Service Manual

ManualsBrandsHitachi ManualsAir ConditionersHitachi RAS-3-HVNC

Table Of Contents

Printed in SpainSMGB0079 rev.0 - 01/2013

Hitachi air conditioning products are manufactured according to:

ISO 9001 of JQA, Japan for its Quality Management accordance with the

standard

ISO 14001 of JACO, Japan for its Environmental Management accordance with

the standard

Hitachi Air Conditioning Products Europe, S.A. is certified with:

ISO 9001 of AENOR, Spain for its Quality Management accordance with the

standard

ISO 14001 of AENOR Spain for its Environmental Management systems

accordance with the standard

Hitachi certifies that our products have met EU consumer safety, health and

environmental requirements.

Hitachi Air Conditioning Products Europe, S.A.

Ronda Shimizu, 1 - Polig. Ind. Can Torrella

08233 Vacarisses (Barcelona) Spain

HITACHI participates in the Eurovent Certification Programme; the certified

data of certified models are listed in the Eurovent Certification Online Directory

(www.eurovent-certification.com).

SMGB0079 rev. 0 - 01/2013

Service Manual

UTOPIA IVX PREMIUM / IVX STANDARD SERIES

H(V)N(P/C)(E)

UTOPIA IVX PREMIUM / IVX STANDARD SERIES

RAS-(2-6)HVNP(E)

RAS-(4-12)HNP(E)

RAS-(3-6)HVNC(E)

RAS-(4-12)HNC(E)

Summary of content (480 pages)

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UTOPIA IVX PREMIUM / IVX STANDARD SERIES H(V)N(P/C)(E) Service Manual RAS-(2-6)HVNP(E) RAS-(4-12)HNP(E) RAS-(3-6)HVNC(E) RAS-(4-12)HNC(E)
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Contents Contents i SMGB0079 rev.
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.II
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General Index Index Contents................................................................................................................................ i 1. General information........................................................................................................ 1 1.1 General information..................................................................................................................................... 2 1.1.1 General notes...........................................
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General Index 3. Piping work and refrigerant charge............................................................................. 51 3.1 General notes before performing pipe work.............................................................................................. 52 3.1.1 Piping Materials.............................................................................................................................................. 52 3.1.2 Three principles on refrigerant piping work................
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General Index 4.3.1 Quantity and position of DIP switches............................................................................................................ 92 4.3.2 Function of the of DIP switches and RSW switches....................................................................................... 93 4.3.3 Jumpers.......................................................................................................................................................... 97 4.3.
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General Index 5.4.1 Cooling operation......................................................................................................................................... 128 5.4.2 Dry operation................................................................................................................................................ 130 5.4.3 Heating operation.........................................................................................................................................
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General Index 8.1.3 Abnormal transmission between the remote control switch and the indoor unit........................................... 186 8.1.4 Abnormal operation of the devices............................................................................................................... 186 8.2 Troubleshooting procedure...................................................................................................................... 192 8.2.1 Alarm display.....................................
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General Index 9.6.1 Cycle and structural parts............................................................................................................................. 308 9.6.2 Electrical parts.............................................................................................................................................. 310 9.6.3 Parts name...................................................................................................................................................
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General Index 10.3.2.5 Removing outdoor fan motor............................................................................................ 348 10.3.2.6 Removing electrical box................................................................................................... 349 10.3.2.7 Removing the compressor............................................................................................... 350 10.3.2.8 Removing the High pressure switch and Pressure switch for control.......................
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General Index 10.3.4.14 Removing other electrical components.......................................................................... 390 10.4 Servicing for Standard Series................................................................................................................ 391 10.4.1 Outdoor Units RAS-(4-6)H(V)NCE............................................................................................................. 391 10.4.1.1 Removing service cover....................................
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General Index 10.4.3.6 Removing electrical box................................................................................................... 426 10.4.3.7 Removing High pressure switch and pressure switch for control..................................... 430 10.4.3.8 Opening electrical box (P-Mounting Plate)....................................................................... 430 10.4.3.9 Removing reversing and solenoid valves coils.................................................................
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General Index 12.3 Service and maintenance record........................................................................................................... 460 12.4 Service and maintenance record using the 7-segment display............................................................. 461 12.5 Service and maintenance record by remote control switch................................................................... 463 12.6 Pump-down method for replacing the compressor...................................
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1. General information 1 . General information 1 Index 1.1. General information.................................................................................................................................. 2 1.1.1. General notes............................................................................................................................................... 2 1.1.2. Introduction...........................................................................................................
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1. General information 1.1 General information 1.1.1 General notes No part of this publication may be reproduced, copied, filed or transmitted in any shape or form without the permission of HITACHI Air Conditioning Products Europe, S.A. Within the policy of continuous improvement of its products, HITACHI Air Conditioning Products Europe, S.A. reserves the right to make changes at any time without prior notification and without being compelled to introducing them into products subsequently sold.
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1. General information 1.2 Safety 1.2.1 Applied symbols During normal air conditioning system design work or unit installation, greater attention must be paid in certain situations requiring particular care in order to avoid damage to the unit, the installation or the building or property. Situations that jeopardise the safety of those in the surrounding area or that put the unit itself at risk will be clearly indicated in this manual.
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1. General information 1.3 Product guide 1.3.1 Classification of outdoor unit models IVX series Unit type (Outdoor unit): RAS Position-separating hyphen (fixed) Capacity (HP): 2, 2.5, 3, 4, 5, 6, 8, 10, 12 H = Heat pump V = Single phase unit (1~ 230V 50Hz) - = Three phase unit (3N~ 400V 50Hz) N = R410A refrigerant P: Premium series C: Standard series E = Made in Europe - = Made in Japan XXX – XX H (X) N X (X) 1.3.
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1. General information 1.3.3 Product guide: Outdoor units IVX Premium 1~ 230V 50Hz Unit Code Unit RAS-2HVNP 60288519 RAS-2.
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1. General information 1.3.
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1. General information 1.3.5 Product guide: Indoor units & complementary systems RCI and RCIM indoor units FSN(2/3)(E)(i) indoor units 1 RCI RCIM 4-way cassette 4-way cassette (compact) Unit Code Unit Code Unit Code RCI-1.0FSN3Ei 7E403014 RCI-1.0FSN3 60278119 RCIM-0.8FSN2 60278010 RCI-1.5FSN3Ei 7E403015 RCI-1.5FSN3 60278120 RCIM-1.0FSN2 60278011 RCI-2.0FSN3Ei 7E403016 RCI-2.0FSN3 60278121 RCIM-1.5FSN2 60278013 RCI-2.5FSN3Ei 7E403017 RCI-2.5FSN3 60278122 RCIM-2.
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1. General information • RCD and RPC indoor units FSN2(E) indoor units RCD RPC 2-way cassette Ceiling type Unit Code Unit Code RCD-1.0FSN2 60278029 RCD-1.5FSN2 60278030 RCD-2.0FSN2 RCD-2.5FSN2 60278031 RPC-2.0FSN2E 7E440003 60278032 RPC-2.5FSN2E RCD-3.0FSN2 7E440004 60278033 RPC-3.0FSN2E 7E440005 RCD-4.0FSN2 60278034 RPC-4.0FSN2E 7E440007 RCD-5.0FSN2 60278035 RPC-5.0FSN2E 7E440008 RPC-6.
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1. General information RPC, RPI and RPIM indoor units FSN(3/4)E indoor units RPI 1 RPIM Indoor ducted unit Unit Code RPI-0.8FSN4E Unit Code 7E424013 RPI-1.0FSN4E 7E424014 RPI-1.5FSN4E 7E424015 RPI-2.0FSN4E 7E424016 RPI-2.5FSN4E 7E424017 RPI-3.0FSN4E 7E424018 RPI-4.0FSN4E 7E424020 RPI-5.0FSN4E 7E424021 RPI-6.0FSN4E 7E424022 RPI-8.0FSN3E 7E424010 RPI-10.0FSN3E 7E424011 9 SMGB0079 rev.0 - 01/2013 Unit Code RPIM-0.8FSN4E 7E430013 RPIM-0.8FSN4E-DU 7E431013 RPIM-1.
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1. General information RPK, RPF and RPFI indoor units FSN(H)(2/3)(E/M) indoor units RPK RPF RPFI Wall type Floor type Floor concealed type Unit Code RPK-0.8FSN3M 60278146 RPK-0.8FSNH3M 60278154 RPK-1.0FSN3M 60278147 RPK-1.0FSNH3M 60278155 Unit Code Unit Code RPF-1.0FSN2E 7E450001 RPFI-1.0FSN2E 7E460001 RPF-1.5FSN2E 7E450002 RPFI-1.5FSN2E 7E460002 RPK-1.5FSN3M 60278148 RPK-1.5FSNH3M 60278156 RPK-2.0FSN3M 60278149 RPF-2.0FSN2E (*) 7E450003 RPFI-2.
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1. General information DX-Interface Control box Expansion valve box 1 DX-Interface Model Code EXV-2.0E1 7E610900 EXV-2.5E1 7E610901 EXV-3.0E1 7E610902 EXV-4.0E1 7E610903 EXV-5.0E1 7E610904 EXV-6.0E1 7E610905 EXV-8.0E1 7E610906 EXV-10.0E1 7E610907 11 SMGB0079 rev.
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2. Unit Installation 2 . Unit Installation Index 2.1. Safety summary..................................................................................................................................... 14 2.2. Transportation of outdoor unit................................................................................................................ 15 2.3. Center of gravity..................................................................................................................................
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2. Unit Installation 2.1 Safety summary DANGER • Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next pages. • Install the outdoor unit where good ventilation is available. • Do not install the outdoor unit where exists a high level of oil mist, salty air or sulphurous atmosphere. • Install the outdoor unit as far as practical (being at least 3 meters) from electromagnetic wave radiator such as medical equipment.
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2. Unit Installation 2.2 Transportation of outdoor unit DANGER Do not put any foreign material into the outdoor unit and check to ensure that none exists in the outdoor unit before the installation and test run. Otherwise a fire or failure will occur. CAUTION 2 Transport the products as close to the installation location as practical before unpacking. Hanging Method When hanging the unit ensure the balance of the unit check safety and lift it up smoothly.
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2. Unit Installation 2.3 Center of gravity Hanging Method When hanging the unit ensure the balance of the unit check safety and lift it up smoothly. Do not remove any packing materials and hang the unit under packing condition with two ropes as shown below. At leat two persons are needed to move the unit. 1 RAS-(2-2.5)HVNP RAS-3HVNC a. 515 mm b. 180 mm h. 275 mm a. 600 mm RAS-3HVNPE b. 195 mm h. 370 mm 1 For 4 HP: a. 590 mm b. 180 mm RAS-(4-6)H(V)NCE h. 360 mm For 5-6 HP: a. 600 mm b. 195 mm h.
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2. Unit Installation 2.4 Factory-supplied accessories for RAS-12HN(P/C) Make sure that the following accessories are packed with the unit. NOTE If any of these accessories are not packed with the unit please contact your dealer. Accessory Quantity Pipe with Flare Nut for Refrigerant Piping 1 17 SMGB0079 rev.
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2. Unit Installation 2.5 Installation space (Initial ckeck) NOTE The following images are for illustration purposes only. 2.5.1 Basic sizes ≥ ≥ RAS-2HVNP - RAS-2.5HVNP - RAS-3HVNC ≥ ≥ ≥ ≥ ≥ All models (except RAS-2HVNP - RAS-2.5HVNP - RAS-3HVNC) ≥ Units in mm. 18 SMGB0079 rev.
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2. Unit Installation 2.5.2 RAS-(2-2.
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2. Unit Installation 2.5.3 RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C) (Unit: mm) Blocked in Inlet Side Upper Side Open Single Installation Multiple Installation (Two units or more) 200 or more of the back space is acceptable when the right and left sides are open. Dimensions in ( ) shows numbers especially for RAS-3HVNPE. Allow 100 mm of space between units. Leave open both right and left sides. Dimensions in ( ) shows numbers especially for RAS-3HVNPE.
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2. Unit Installation Outlet Side Blocked Upper Side Open Single Installation Multiple Installation (Two units or more) Allow 100 mm of space between units. Both right and left sides shall be open. Be sure to use the fan direction guide. Leave open both right and left sides. Be sure to use the fan direction guide. Allow 100 mm of space between units. Leave open both right and left sides. No more than 2 units for multiple installation.
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2. Unit Installation Stack installation (allowed up to 2 Units) Upper Side Open Single Installation Multiple Installation Close the part A not to allow the outlet air bypassed. Install to avoid the drain water from upper unit falling on the lower unit. Allow 100 mm of space between units. Serial sideways installation allowed up to two units. Leave open both right and left sides. Close the part A not to allow the outlet air bypassed.
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2. Unit Installation 2.6 Place provision 2.6.1 Place provision for RAS-(2-2.5)HVNP / RAS-3HVNC 1 Secure the outdoor unit with the anchor 1. Base of outdoor unit 2. Nut 1 3. Special washer (M12) 2 4. Anchor bolts 5. Filled mortar 3 A 6. Concrete 4 A. Max. 17 mm 6 5 Fix the outdoor unit to the anchor bolts by special washer of factory-supplied accessory. 2 When installing the outdoor unit fix the unit by anchor bolts.Regarding the location of fixing holes. 1.
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2. Unit Installation 4 The whole of the base of the outdoor unit should be installed on a foundation. When using vibration-proof mat it should also be positioned the same way. When installing the outdoor unit on a field-supplied frame use metal plates to adjust the frame width for stable installation as shown in Figure. 1. Outdoor unit is unstable 2. Frame 3. Outdoor unit is stable 4. Metal plate A. 57 mm. Base width of outdoor unit B. 60 mm Frame width (Field-supplied) C.
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2. Unit Installation 2.6.2 Place provision for RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C) Concrete foundation • Foundation could be on flat and it is recommended to be 100-300 mm higher than ground level. • Install a drainage around foundation for smooth drain. • When installing the outdoor unit fix it by M10 anchor bolts. • When installing the unit on a roof or a veranda drain water sometimes turns into ice on a cold morning.
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2. Unit Installation Recommended Metal Plate Size • (Field-Supplied) Material: Hot-Rolled Mild Steel. 120 60 • Plate (SPHC) Plate Thickness: 4.5 T. RAS-(4-6)H(V)N(P/C)E R RAS-12HN(P/C) RAS-(8-10)HN(P/C) 420 A 70 A (mm) 410 420 B (mm) 550 560 14 RAS-3HVNPE Model 4-C10 20 70 (B) (560) Example of fixing outdoor unit by anchor bolts 1. Max. 21 mm (After cut “A”) 2. Concrete 3. Anchor bolt 1 B B. Cut this portion when this type of anchor bolt is used.
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2. Unit Installation Suspended unit 1 Suspend the unit as shown in the figures. 2 Ensure that wall can withstand the weight of the outdoor unit indicated on the specifications plate. 3 It is advisable that each foot support should bear the full weight of the unit (in order take account of applied stress fatigue when unit is operating). RAS-3HVNPE RAS-(4-6)H(V)NPE RAS-(4-6)H(V)NCE RAS-(8-10)HN(P/C)E RAS-12HN(P/C) 1 1 2 3 1. Wall support (field supplied) 2 3 2.
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2. Unit Installation Installing location where the unit will be exposed to strong wind Follow the instructions below to install on the roof or in a place which is not surrounded by buildings and where the product may be buffeted by strong winds. 1 Select a place where the input or outlet side of the product is exposed to strong winds. 2 When the outlet is exposed to strong winds: Strong direct winds may cause a lack of air flow and negative effects on the unit operation.
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2. Unit Installation 2.7 Optional parts and installation 2.7.1 Optional parts and installation for RAS-(2-2.
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2. Unit Installation Locations of fixing holes The holes Location shall be made by using self-screws (M4x13) and later shall be used SUS screw (M5x12) for fixing air flow guide. 1 1 Outdoor Unit 2 Hole (4 locations) 2 One flow guide installation 1 2 3 4 5 Air discharge grille Air flow Outdoor unit M5 fixing screw x4 (Accessories) Air flow guide 1 • In case of right and left sides air discharge enough space for air discharge is required. • The downward air discharge is also available.
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2. Unit Installation Wind guard Specifications Model WSP-264 Quantity 1 per unit Material Galvanized sheet metal + baked painting Color UTOPIA Beige Weight 4.
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2. Unit Installation Snow protection hood Air discharge hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Front panel 1 4 Fixing screw (Accessories) 5 Hole for safety wire rope to prevent overturning 3 4 5 1 2 Rear suction hood Nº Part name 1 Right side plate Quantity 1 2 Left side plate 1 3 Upper front panel (Upside) 1 4 Upper front panel (Downside).
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2. Unit Installation Attaching example of snow protection hood A B C 2 1 4 1 2 2 3 1 1 1 5 1 1. Fixing screw (accessories) 2. Air inlet hood 3. Wire rope (optional for over turning protection) 4. Air discharge hood 5. Outdoor unit A. Rear side B. Left side C Front side NOTE • The holes locations marked with a mark shall be made by using sel screw (M4X13) and later shall be used SUS Screw for fixing protection hood.
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2. Unit Installation 2.7.
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2. Unit Installation One flow guide installation 1 2 3 4 5 Air discharge grille Air flow Air flow guide Outdoor unit M5 fixing screw x4 (Accessories) 5 4 1 2 2 3 Service space (In case of upward air discharge) • In case of right and left sides air discharge enough space for air discharge is required. • The downward air discharge is also available. In such case install the base under the unit to secure enough space for air discharge.
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2. Unit Installation Wind guard Specifications Model WSP-335A Quantity 1per unit Material Galvanized sheet metal + baked painting Color Gray (1.0Y8.5/0.5) Weight 5.
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2.
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2. Unit Installation Attaching example of snow protection hood 1 1 2 5 6 3 1 4 1 A B 1 7 C 1. Fixing screw (Accessories). 2. Rear suction hood 3. Wire rope (Optional. For overturning protection) 4. Air discharge grille 5. Left suction hood 6. Air discharge hood A. Left side B. Front side C. Rear side Specifications of snow protection hood Product name Air discharge hood Model ASG-NP335F Quantity ASG-NP335FS2 Bonderized steel sheet (NSSC 180) Gray (1.0Y8.5/0.
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2. Unit Installation 2.7.
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2. Unit Installation Two flow guides installation 1 2 3 4 5 Air discharge grille Air flow Air flow guide (see the note) Outdoor Unit M5 fixing screw x4 (Accessories) NOTE • Air flow direction of both air flow guides should be the same. Service space (In case of upward air discharge) • In case of right and left sides air discharge enough space for air discharge is required. • The downward air discharge is also available.
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2. Unit Installation Wind guard Specifications Model WSP-335A Quantity 2 per unit Material Galvanized sheet metal + baked painting Color Gray (1.0Y8.5/0.5) Weight 5.
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2.
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2. Unit Installation Attaching example of snow protection hood 2 1. Left suction hood 2. Fixing screw (Accessories) 3. Rear suction hood Upper side 4. Wire rope (Optional. For overturning protection) 5. Rear suction hood Lower side 6. Air discharge hood 7. Air discharge grille 8. Air discharge grille A. Front side B. Left side C. Rear side 43 SMGB0079 rev.
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2. Unit Installation Specifications of snow protection hood Product name Air discharge hood Model ASG-NP335F Quantity ASG-NP335FS2 Rear suction hood ASG-NP280B Left suction hood ASG-NP280BS2 2 per unit Bonderized steel sheet Material Iron Color Weight ASGNP280LS2 1 per unit Stainless (NSSC 180) Gray (1.0Y8.5/0.5 or approximation) ASG-NP280L — 3 kg Bonderized steel sheet Stainless (NSSC 180) Iron Gray (1.0Y8.5/0.
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2. Unit Installation 2.7.
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2. Unit Installation Two flow guides installation 1 2 3 4 5 Air discharge grille Air flow Air flow guide (see the note) Outdoor Unit M5 fixing screw x4 (Accessories) NOTE Air flow direction of both air flow guides should be the same. Service space (In case of upward air discharge) • In case of right and left sides air discharge enough space for air discharge is required. • The downward air discharge is also available.
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2. Unit Installation Wind guard Specifications Model WSP-335A Quantity 2 per unit Material Galvanized sheet metal + baked painting Color Gray (1.0Y8.5/0.5) Weight 5.
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2.
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2. Unit Installation Attaching example of snow protection hood 1100 1 2 2 8 390 5 6 2 4 A 1650 2 3 2 2 C 1. Left suction hood 2. Fixing screw (Accessories) 3. Rear suction hood Upper side 4. Wire rope (Optional. For overturning protection) 5. Air discharge hood 6. Air discharge grille 7. Rear suction hood Lower side 8. Outdoor unit A. Front side B. Left side C. Rear side 49 SMGB0079 rev.
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2. Unit Installation Specifications of snow protection hood Product name Air discharge hood Model ASG-NP335F Quantity ASG-NP335FS2 Rear suction hood ASG-NP335B Left suction hood ASG-NP335BS2 2 per unit Bonderized steel sheet Material Iron Color Weight ASGNP335LS2 1 per unit Stainless (NSSC180) Gray (1.0Y8.5/0.5 or approximation) ASG-NP335L — Bonderized steel sheet Stainless (NSSC180) Iron Gray (1.0Y8.5/0.
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3. Piping work and refrigerant charge 3 . Piping work and refrigerant charge Index 3.1. General notes before performing pipe work........................................................................................... 52 3.1.1. Piping Materials.......................................................................................................................................... 52 3.1.2. Three principles on refrigerant piping work..................................................................
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3. Piping work and refrigerant charge 3.1 General notes before performing pipe work 3.1.1 Piping Materials 1 In order to avoid supply problems in terms of local regulations and quality, prepare locally-supplied copper pipes. NOTE In case of using copper pipes for piping sections bigger than Ø19.05 mm (3/4 inches), flaring work cannot be performed. If necessary, use a joint adapter. 2 Select the piping size with the correct thickness and correct material able to withstand sufficient pressure.
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3. Piping work and refrigerant charge CAUTION • Cap the end of the pipe when pipe is to be inserted through a wall hole. • Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe. • If piping installation is not completed until next day or over a longer period of time, braze off the ends of the piping and charge with oxygen free nitrogen through a Schrader valve type access fitting to prevent moisture and particle contamination.
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3. Piping work and refrigerant charge 3.1.2 Three principles on refrigerant piping work In case of using refrigerant R410A in the refrigeration cycle, the refrigeration oil should be of a synthetic type one. In order to avoid oxidation, pay much careful attention to basic piping work control to avoid infiltration of moisture or dust during the refrigerant piping work.
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3. Piping work and refrigerant charge 3.1.4 Brazing work The most important work in the refrigerant piping installation work is the brazing of the pipes. If it accidentally occurs a leakage due to a careless brazing process, it will cause clogged capillary pipes or serious compressor failure.
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3. Piping work and refrigerant charge 3.2 Piping connection for outdoor unit 3.2.1 RAS-(2-2.5)HVNP / RAS-3HVNC 1 Take the piping cover away from the unit. Then fetch the pipes through the rear side and route piping according to the installation place as shown in the figure. Make holes by cutting along the guideline at the rear of the cover or punching with a driver. Remove the burr with a cutter, and place a insulation (field supplied) to protect cables and pipes.
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3. Piping work and refrigerant charge 3.2.2 RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E / RAS-12HN(P/C) 1 The pipes can be connected from 4 directions. Make holes in the piping cover or cabinet for taking out pipes.
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3. Piping work and refrigerant charge For the front and side piping Select the correct knock-out size depending on whether it is for power wiring or transition wiring RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E / RAS-(8-10)HN(P/C)E RAS-12HN(P/C) Right-SIde Piping Hole Right side piping hole Front piping hole Front-SIde Piping Hole Front piping hole Rigth side piping hole B A A To use racking or conduit tubes, check the size and remove B part following the slit.
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3. Piping work and refrigerant charge For the rear side piping After removing the rear-side piping cover, punch out the “A” holes along the guide line. Rear Cover 3 NOTE Remove the rear pipe cover under the rear cover and remove part following the slit. 2 Mount the piping cover in order to avoid water entering into the unit. Seal the holes where pipes and wires are inserted, by using insulation (field-supplied).
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3. Piping work and refrigerant charge 3.2.3 Outdoor unit stop valve 1 Remove the stop valve cap before performing the air tight test after connecting the flare nut. Tighten the spindle valve in clockwise according to the following table “Tightening Torque of Stop Valves.” 2 Tighten the flare nut according the specified torque. If the tightening torque is excessive, it may cause refrigerant leakage from the spindle part. 3 Perform the air tight test after the tightening work.
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3. Piping work and refrigerant charge Hexagonal wrench size used for spindle valve: 2HP, 2.5HP 3HP, 4-6HP Standard Gas valve 4 mm 5 mm - Liquid valve 4 mm 4 mm 4 mm (*) Size Do not apply two spanners at this position. If applied, leakage will occur. 4-6 HP Premium, 8-12HP Stop valve (Spindle type) Flare nut Use two spanners here for pipe connection Don not apply two spanners work here Do not work with two spanners here.
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3. Piping work and refrigerant charge 3.3 Refrigerant piping range 3.3.1 Refrigerant piping length The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following chart. Keep the design point within the area of the chart, which is showing the applicable height difference according to piping length. 3.3.2 Piping system for header branch 1 indoor unit system (O.U. from 2 to 10 HP) 2 indoor units system (O.U. from 2 to 12 HP) 3 indoor units system (O.U.
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3. Piping work and refrigerant charge Maximum refrigerant piping length IVX Premium series (m) Outdoor Unit 2HP Maximum piping length 2.
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3.
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3. Piping work and refrigerant charge 3.3.
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3. Piping work and refrigerant charge 3.3.4 Combinations of piping size and piping length IVX Premium series Liquid Gas Ø6.35 Ø9.52 Ø9.52 Ø12.70 Ø15.88 Ø19.05 Ø12.70 Ø15.88 15 Ø19.05 Ø12.70 Ø22.20 Ø25.40 Ø15.88 Ø19.05 Ø22.20 Ø15.88 Ø25.40 Ø28.60 Ø22.20 Ø25.40 Performance capacity 2 HP Ø28.60 (m) 50 30 - 15 - - - - - - - - - - - 2.
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3. Piping work and refrigerant charge 3.3.5 Refrigerant piping size and multikit/distributor selection CAUTION • Do not use refrigerant pipe sizes other than those indicated in this Technical Catalogue. The diameter of the refrigerant pipes depends directly on the outdoor unit capacity. • If larger diameter gas refrigerant pipes are used, the circuit lubrication oil tends to separate from the gas carrying it. The compressor will be seriously damaged due to a lack of lubrication.
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3. Piping work and refrigerant charge 3 indoor units system (mm) Multi-kit Pipe Size (A) Outdoor Unit HP IVX Premium Series IVX Standard Series Gas Liquid 4/5/6 Ø15.88 Ø9.52 TG-53AN TRE-46N1 8 Ø25.40 Ø9.52 TG-103AN TRE-812N1 10 /12 Ø25.40 Ø12.70 TG-103AN TRE-812N1 (1) In case that pipe length (A+B or A+C or A+D) exceeds 70m in 8 HP, please use a Ø12.7 pipe as a liquid pipe. (mm) Pipe Size (B, C, D) Indoor Unit capacity Gas Liquid ≤ 1.5 HP Ø12.70 Ø6.35 1.8 / 2.0 HP Ø15.
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3. Piping work and refrigerant charge Line branch system A B C D (mm) Outdoor Unit HP Pipe Size (D) Gas Multi-kit model A Multi-kit model B IVX Premium Series IVX Standard Series IVX Premium Series IVX Standard Series Liquid 3/4/5/6 Ø15.88 Ø9.52 E-102SN2 E-102SN2 E-102SN2 E-102SN2 8 Ø25.40 Ø9.52(1) E-162SN2 E-162SN2 E-102SN2 E-102SN2 10 /12 Ø25.40 Ø12.
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3. Piping work and refrigerant charge 3.3.6 System installation NOTE • Pipe connection size on outdoor units, indoor units and the multikit or distributor vary according to the system. • The sizes of the indoor and outdoor units could be different. Adjust the flare adapter (accessory) to the indoor pipe connection in these cases. Height Difference Between Indoor Units and Distributor It is recommended to install all indoor units at the same height.
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3. Piping work and refrigerant charge 3 Correct position of distributor (available also for quad installation) • This is the correct position: Up Branch pipe Greater than 0.5 m Refrigerant direction Main pipe Main pipe Refrigerant direction Down • This is wrong position. Refrigerant direction Branch pipe Main pipe Refrigerant direction Main pipe Branch pipe Branch pipe 4 Correct position of Triple Branch Pipe (Standard series only).
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3. Piping work and refrigerant charge 3.4 Refrigerant charge CAUTION • Do not charge OXYGEN, ACETYLENE, or other flammable and poisonous gases into the refrigerant, as an explosion could occur. It is recommended that oxygen free nitrogen be charged for these types of test cycles when performing a leakage test or an airtight test. These types of gases are extremely dangerous. • Insulate the unions and flare-nuts at the piping connection part completely.
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3. Piping work and refrigerant charge 3.4.1 Caution of the pressure by check joint When the pressure is measured, use the check joint of gas stop valve (A), and use the check joint of liquid piping (B) in the figure below. At that time, connect the pressure gauge according to the following table because of high pressure side and low pressure side changes by operation mode. RAS-(2-2.
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3. Piping work and refrigerant charge 3.4.2 Refrigerant charge quantity Although refrigerant has been charged into this unit, additional refrigerant charge is required according to piping length. 1 The additional refrigerant quantity should be determined and charged into the system according to the following procedure. 2 Record the additional refrigerant quantity in order to facilitate maintenance and servicing activities.
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3. Piping work and refrigerant charge Additional refrigerant charge calculation method Calculate the additional refrigerant charge amount according to the following steps: Step 1: Additional refrigerant charge calculation for liquid piping (W1 (kg)) Outdoor units have been charged with refrigerant for 30m (20m for RAS-3HVNC) of actual piping length, an additional refrigerant charged is required in systems with actual piping length longer.
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3.
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3. Piping work and refrigerant charge Setting of pipe length DSW. DSW2 setting will be required only when the refrigerant pipe length is shorter than 5 m or longer than 30 m. Pipe length setting shall be performed as shown below. (The ■ side in the DIP switch show the position.
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3. Piping work and refrigerant charge 3.5 Caution in case of refrigerant leakage The installers and those responsible for drafting the specifications are obliged to comply with local safety codes and regulations in the case of refrigerant leakage. 3.5.1 Maximum permitted concentration of hydrofluorocarbon (HFC) The refrigerant R410A, charged in the UTOPIA series system, is an incombustible and non-toxic gas. However, if leakage occurs and gas fills a room, it may cause suffocation.
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3. Piping work and refrigerant charge 3.6 Piping work for compatibility with the piping of current installations where is used R22 or R407C. NOTE Contact your Hitachi dealer for specific support on your instalation. The new IVX Premium and IVX Standard are compatible with those installations that have been operating with R22 or R407C. This allows installing the IVX Premium/Standard Outdoor Units, which operate with R410A, without having to change piping installation. 3.6.
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3. Piping work and refrigerant charge 3.6.3 Permissible range for existing Air-Conditioning Pipes (Pipe length in the case of “without cleaning process”. IVX Premium series Liquid Ø6.35 Ø9.52 Ø12.70 0.8 0.8 0.8 Thickness (mm) Gas Thickness (mm) Material Softannealed Ø15.88 1.0 Ø9.52 Ø12.70 Ø15.88 Ø19.05 Ø12.70 Ø15.88 Ø19.05 Ø22.20 Ø25.40 Ø15.88 Ø19.05 Ø22.20 Ø25.40 Ø28.58 Ø22.20 Ø25.40 Ø28.58 0.8 0.8 1.0 1.0 0.8 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.
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3. Piping work and refrigerant charge 3.6.4 Renewal kit selection model Hitachi offers, as an accessory, a renewal kit: Recommended renewal kit Renewal Kit IVX Premium External Attachment to Outdoor Unit [Short Pipe (local) + Kit + Existing Piping] RAS-(2/2.
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3. Piping work and refrigerant charge Model TRF-NP160U Pipe 130 For liquid pipe Pipe connecting port Pipe connecting port for O.U (Ø38.1) for I.U (Flare connection) (Flare connection) 262 130 For gas pipe Pipe connecting port (Ø38.1) Pipe connecting port for I.U (Flare connection) for O.U (Flare connection) O.U.: Outdoor Unit I.U.: Indoor Unit Model TRF-NP280U Pipe 314 314 130 130 For liquid pipe Pipe connecting (φ38.1) 360 360200 (φ25.4) (φ25.4) port for O.
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Renewal kit installation (Example) RAS-(2/2.
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3. Piping work and refrigerant charge RAS-12HV(P/C) Existing refrigerant pipe (Outlet on the rear side) Existing refrigerant pipe (Brazing connection) Strainer for liquid pipe Flare connection Strainer for gas pipe Brazing connection Elbow connection (Field-Supplied) Existing refrigerant pipe (Outlet on the rear side) Existing refrigerant pipe (Outlet on the rear side) NOTE Sizes (a) to (g) depend on the outdoor unit model RAS-(2/2.
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3. Piping work and refrigerant charge 3.7 Drain piping 3.7.1 Drain discharging boss When the base of the outdoor unit is temporarily utilized as a drain receiver and the drain water in it is discharged, this drain boss is utilized to connect the drain piping. Model Applicable Model DBS-12L RAS-(2/2.5)HVNP RAS-3HVNC DBS-26 RAS-3HVNPE RAS-(4-6)H(V)N(P/C)E RAS-(8-10)HN(P/C)E RAS-12HN(P/C) 3 Connecting procedure 1 Insert the plastic cap into the drain boss up to the extruded portions.
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4. Electrical wiring 4 . Electrical wiring Index 4.1. General notes......................................................................................................................................... 88 4.1.1. General check............................................................................................................................................ 88 4.2. Electrical wiring connection for the outdoor unit................................................................................
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4. Electrical wiring 4.1 General notes CAUTION • Before any electrical wiring work or regular inspections, switch off the main power supply switches of the indoor and outdoor units. Wait three minutes before starting installation or maintenance work. • Make sure that the indoor and outdoor are completely stopped before starting work on the electrical wiring or regular inspections. • Protect cables, drain hose, electric parts, etc.
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4. Electrical wiring MODEL Z max (Ω) RAS-2HVNP - MODEL Z max (Ω) RAS-2.5HVNP - RAS-3HVNPE 0.39 RAS-3HVNC - RAS-4HVNPE 0.27 RAS-4HVNCE 0.27 RAS-5HVNPE 0.27 RAS-5HVNCE 0.27 RAS-6HVNPE 0.27 RAS-6HVNCE 0.
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4. Electrical wiring 4.2 Electrical wiring connection for the outdoor unit The correct electrical wiring connection for the outdoor unit is shown below. 1 Insert the power source cables L1, L2, L3 and N (for 400V/50Hz) or L1 and N (for 230V/50Hz ) and the ground cable into the ring core, coiling them with two turns and fix the cables using the cable tie (accessory). As shown in next figure, do not insert the cables from different sides into the ring core. 1. N/(L2) Wire. 2. L1 Wire.
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4. Electrical wiring 3 Connect the wires between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board. 1 2 1 1. Power supply 1~ 230V. 1. Power supply 3N~ 400V. 2. Control cable (5V). 2. Control cable (5V). 2 4 Fix the cable with the clamp supplied in the Electrical Box to ensure strain relief. 5 When routing out cable, make sure that it does not obstruct mounting of the outdoor service cover.
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4. Electrical wiring 4.3 Setting the DIP switches for the outdoor unit 4.3.1 Quantity and position of DIP switches The PCB in the outdoor unit is operating with DIP switches and push switches. The location is as follows: RAS-(2/2.5)HVNP / RAS-3HVNC PCB2 PCB1 RAS-(3-12)H(V)N(P/C)(E) 92 SMGB0079 rev.
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4. Electrical wiring 4.3.2 Function of the of DIP switches and RSW switches NOTE • The mark “■” indicates the position of dips switches. • No mark “■” indicates pin position is not affecting. • The figures show the settings before shipment or after selection. DANGER Before setting dips switches, first turn the power source off and then set the position of the dips switches. In case of setting the switches without turning the power source off, the contents of the setting are invalid.
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4. Electrical wiring DSW2: Pipe length setting (setting is required) / Optional function setting Setting before shipment Pipe length setting should be performed as follows according to the on-site pipe length. Pipe length (≤5m) Pipe length (≥30m) Cooling only Control to support existing pipes ON Optional function setting 1 2 3 4 5 6 External input/output setting mode DSW3: Capacity setting (no setting is required) Factory setting RAS-2HVNP RAS-2.
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4. Electrical wiring DSW4 / RSW1: Refrigerant cycle number setting (Setting is required) In case of using an H-Link II net it is required to set the refrigerant cycle number. ON Setting for the ten digit (Factory setting) 1 2 3 4 5 6 Setting position. Set by inserting slotted screwdriver into the groove (setting for the last digit) Rotary switche’s positions (RSW1) are set by inserting a screw driver into the groove. DSW5: End terminal resistance (No setting is required) • Before shipment, No.
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4. Electrical wiring end terminal resistance setting.
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4. Electrical wiring 4.3.3 Jumpers Jumper lead setting (JP1~6) Setting before shipment: System JP1 JP2 JP3 JP4 JP5 JP6 Single phase (1~) 0 1 1 1 0 0 Three-phase (3N~) 1 1 0 1 0 0 NOTE • 0: Open • 1: Short circuit The function selection using the jumper lead setting is shown in the tables below: RAS-(2-2.
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4. Electrical wiring 4.4 Common wiring 4.4.1 Electrical wiring between outdoor and indoor unit • Connect the electrical wires between the indoor unit and the outdoor unit as show in the figure. • When installing the electrical wiring, follow local codes and regulations. • The refrigerant piping and the control wiring are connected to the units in the same refrigerant cycle. • Use twist pair wire (more than 0.
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4. Electrical wiring 4.4.2 Wire size Connection wiring Recommended minimum sizes for field provided wires: Model Power supply All Indoor Units 1~ 230V 50HZ Power source cable size Transmitting cable size EN60 335-1 EN60 335-1 0.75 mm² 0.75 mm² IVX Premium Series RAS-2HVNP 2.5 mm² RAS-2.5HVNP RAS-3HVNPE RAS-4HVNPE 4.0 mm2 1~ 230V 50HZ 6.0 mm2 RAS-5HVNPE RAS-6HVNPE 0.75 mm² RAS-4HNPE 2.5 mm2 RAS-5HNPE RAS-6HNPE RAS-8HNPE 3N~ 400V 50Hz 6.
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4. Electrical wiring Main switch protection Select the main switches in according to the next table: Model All Indoor Units Power supply Max. current (A) CB (A) ELB (no. poles/A/mA) 1~ 230V 50Hz 5.0 6 2/40/30 ELB: Earth switch; CB: Circuit braker IVX Premium series Outdoor unit MC (A) CB (A) RAS-2HVNP 12.0 16 RAS-2.5HVNP 14.0 20 RAS-3HVNPE 19.0 20 RAS-4HVNPE 28.0 32 RAS-5HVNPE 28.0 32 RAS-6HVNPE 28.0 32 RAS-4HNPE 11.5 15 RAS-5HNPE 11.5 15 RAS-6HNPE 13.
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4. Electrical wiring 4.5 H-LINK II system The H-LINK II is the wiring connection system between units. The H-LINK II wiring system only needs: • Two transmission wires connecting each indoor and outdoor unit for a total of 64 refrigerant cycles. • Connection wiring for all indoor and outdoor units in series. CAUTION The H-LINK II system cannot be applied to the models with the old cycle, nor to units with an old transmission. 4.5.
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4. Electrical wiring 4.5.3 DIP Switch setting for twin, triple and quad systems Dip switch of indoor PCB and outdoor H-LINK II The DIP switches of all the indoor and outdoor units have to be set and the impedance of the transmission circuit adapted. • Example of the setting of the DIP switches. A D E F G H E F I J A: Cycle No. 0. B: Cycle No. 1. C: Cycle No. 2. D: Terminal resistance. E: No. of refrigerant cycle (setting for the tenth digit). F: No.
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4. Electrical wiring Unit Name of DIP switch Mark Setting before the Shipment Function DSW4 RSW1 For setting the refrigerant cycle address of the outdoor unit. Set the DSW4 and RSW1 to overlap the setting of other outdoor units in the same H-LINK system. Resistance of terminal DSW5 To adapt the impedance of the transmission circuit, adjust DSW5 according to the number of outdoor units of the H-LINK system.
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4. Electrical wiring 4.5.5 Examples of H-LINK II system Two cases: 1. Using H-LINK II system for air conditioning systems without a central control device (CSNET WEB or PSCA64S). • Line connection with all units (including Utopia and/or Set Free, Mini Set Free and DC Inverter). A B C A: Outdoor units. B: Indoor units. C: Do not install wiring in a loop. • Line connection for each floor. A A: Outdoor units. B: Indoor units. 104 SMGB0079 rev.
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4. Electrical wiring • Connection with one main line and with the branch lines for the units. A A: Outdoor units. B: Indoor units. CAUTION • The maximum number of units than can be connected is 64 outdoor units and 160 indoor units (including Utopia and/or Set Free, Mini Set-free). • Do not install the wiring in a loop. • If the H-LINK II system is not used when carrying out the electrical wiring as shown above, it must be used once the wiring of the instrument is completed.
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4. Electrical wiring 4.6 System Control 4.6.1 Individual Operation Control Wiring (H-LINK II) Indoor Unit Outdoor Unit DSW6 ON OFF 1 2 Dip Switch 6 setting is NOT required. ( The factory setting position is for the individual operation.) Remote Control Switch (PC-ARF) Individual Thermo ON/OFF Operation The individual Thermo ON/OFF is available to be controlled each indoor unit even if multiple indoor units are controlled simultaneously by one remote control switch.
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4. Electrical wiring 4.6.2 Simultaneous Operation This unit can be operated simultaneously with twin, triple and quad combinations. One remote control switch (PC-ARF) can control without transition wiring up to 4 units of FSN2 series or later model types (H-LINK II supported models) simultaneously (Available if it is with the transition wiring.) Control Wiring (H-LINK II) Indoor Unit Outdoor Unit DSW6 ON OFF 1 2 The dip switch 6 setting is required. Set DSW6-1# pin to OFF side for simultaneous operation.
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4. Electrical wiring 4.7 Electrical wiring diagrams 317S139290 / 317S139291 /317S139294 108 SMGB0079 rev.0 - 01/2013 RAS-2.5HVNP RAS-3HVNC RAS-2HVNP 4.7.1 RAS-(2-2.
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4. Electrical wiring W Surface 4.7.2 RAS-3HVNPE (1~ 230V 50Hz) U Surface V Surface 4 XEK01261_0 109 SMGB0079 rev.
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4. Electrical wiring U Surface V Surface W Surface 4.7.3 RAS-(4-6)HVNPE (1~ 230V 50Hz) XEK01262_0 110 SMGB0079 rev.
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4. Electrical wiring U Surface V Surface W Surface 4.7.4 RAS-(4-6)HNPE (3N~ 400V 50Hz) XEK01263_1 111 SMGB0079 rev.
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W Surfac 4. Electrical wiring V Surface 5-6HP 4HP 5-6HP 4HP U Surface 4HP 4HP 5-6HP 4.7.5 RAS-(4-6)HVNCE (1N~ 230V 50Hz) 112 SMGB0079 rev.
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W Surface 4. Electrical wiring V Surface 5-6HP 4HP 5-6HP 4.7.6 RAS-(4-6)HNCE (3N~ 400V 50Hz) 4HP 5-6HP 4HP U Surface 4HP 4 113 SMGB0079 rev.
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4. Electrical wiring 4.7.7 RAS-(8-10)HN(P/C)E (3N~ 400V 50Hz) XEK01288_0 114 SMGB0079 rev.
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4. Electrical wiring 4.7.8 RAS-12HNP (3N~ 400V 50Hz) - Preliminary data 4 317S136064 115 SMGB0079 rev.
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4. Electrical wiring 4.7.9 RAS-12HNC (3N~ 400V 50Hz) - Preliminary data 317S136071 116 SMGB0079 rev.
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5. Control System 5 . Control System Index 5.1. Device control system.......................................................................................................................... 118 5.2. Outdoor units PCB............................................................................................................................... 120 5.2.1. RAS-(2-2.5)HVNP / RAS-3HVNC............................................................................................................. 120 5.2.2.
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5. Control System 5.1 Device control system Purpose Control subject Control frequency of inverter compressor Opening degree expansion valve of outdoor unit Cooling operation Heating operation The frequency control is determined with the next parameters: The frequency control is determined with the next parameters: • Ratio (I.U. capacity/O.U. capacity) for individual operation. • Ratio (I.U. capacity/O.U. capacity) for individual operation.
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5. Control System The figure below shows the outline of the control system Multiple signals Wireless remote control switch Thermistor for inlet air Transmission circuit Remote control MCU Single signals Suction gas pressure sensor Thermistor of discharge air Discharge gas pressure sensor Thermistor for gas pipe Thermistor for liquid pipe Operation signals Thermistor for outdoor temperature Discharge gas thermistor Thermistor for heating evaporation temp.
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5. Control System 5.2 Outdoor units PCB 5.2.1 RAS-(2-2.
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5. Control System 5.2.
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5. Control System 5.2.
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5. Control System 5.2.
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5. Control System 5.2.
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5. Control System 5.2.
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5. Control System 5.2.
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5. Control System 5.3 Protection and safety control Compressor protection The following devices and their combinations protect the compressor High-pressure switch This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting. This band heater protects against the oil carry-over during the cold starting, as the band heater is energized while the compressor is stopped.
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5. Control System 5.4 Standard operation sequence 5.4.1 Cooling operation 75ºC 75ºC (for RAS-(2-2.5)HVNP 60ºC) RAS-3HVNC (for RAS-(2-2.5)HVNP 60ºC) RAS-3HVNC 12HN(P/C) 25ºC 15ºC 25ºC 15ºC 1 Continues in the next page. 128 SMGB0079 rev.
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5. Control System Td target temp. -15ºC (for RAS-(2-2.5)HVNP<60ºC) RAS-3HVNC Td target temp. -10ºC (for RAS-(2-2.5)HVNP 60ºC) RAS-3HVNC Power to Y52C or RY1 : ON 5 COOL 129 SMGB0079 rev.
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5. Control System 5.4.2 Dry operation Continues in the next page. 130 SMGB0079 rev.
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5. Control System Td target temp. -15ºC (for RAS-(2-2.5)HVNP<60ºC) RAS-3HVNC Td target temp. -10ºC (for RAS-(2-2.5)HVNP 60ºC) RAS-3HVNC Power to Y52C or RY1 : ON 5 3 DRY 131 SMGB0079 rev.
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5. Control System 5.4.3 Heating operation 75ºC 75ºC (for RAS-(2-2.5)HVNP<60ºC) RAS-3HVNC (for RAS-(2-2.5)HVNP 60ºC) RAS-3HVNC 12HN(P/C) 25ºC 15ºC 15 25ºC 15ºC -1ºC in Power to Y52C or RY1 : ON After 3 to 48 sec. IU demand frequency <90Hz Power to YH2:OFF 90Hz Power to YH2:ON MOF (with Thermo-OFF: Low fan speed) Continues in the next page. 132 SMGB0079 rev.
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5. Control System Td target temp. -15ºC (for RAS-(2-2.5)HVNP<60ºC) RAS-3HVNC Td target temp. -10ºC (for RAS-(2-2.5)HVNP 60ºC) RAS-3HVNC Power to Y52C or RY1 : ON IU Air outlet temperature Higher than 50ºC HEAT 133 SMGB0079 rev.
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5. Control System 5.4.4 Automatic cooling and heating operation 134 SMGB0079 rev.
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5. Control System 5.4.5 Defrost operation control Power to YH2:ON RAS-(2-2.5)HVNP / RAS-3HVNC * DSW2-1 ON (and DSW2-2ON for RAS-2.5HVNP) After 30 seconds N 5 Other than above IU demand frequency <90Hz 90Hz Power to YH2:ON 135 SMGB0079 rev.
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5. Control System Defrosting Operation The following defrosting operations, “Standard Defrost”, “Forced Defrost” and “Manual Defrost” are available. 1 Standard Defrost This operation is started according to the outdoor temperature, the outdoor evaporating temperature and operating time. 2 Forced Defrost This operation starts when the indoor unit is operated Thermo-ON/OFF repeatedly and the standard defrost is not used.
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5. Control System NOTE For RAS-(2-2.5)HVNP / RAS-3HVNC: • (*1) More than 39 minutes. • (*2) If outdoor temperature is less than -6ºC then the compressor is operated continuously for more than 2 minutes. If outdoor temperature is more than -6ºC then the compressor is operated continuously for more than 9 minutes. • (*3) Less than 6ºC. Condition for Completing Defrost Operation The defrosting operation is stopped when any of following conditions are met.
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5. Control System 5.5 Standard control functions 5.5.1 Freezing protection during cooling process or dry operation Cooling or Dry Operation Cooling or Dry Operation 138 SMGB0079 rev.
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5. Control System 5.5.2 Prevention Control for High Pressure Increase during Cooling Operation This function is performed to prevent the abnormal condition (Alarm Code: 02) when the air flow volume is decreased by a seasonal wind against air outlet of the outdoor unit. When the following conditions are met, the forced Thermo-OFF operation will be performed. The cause of stoppage will be 13 during Thermo-OFF. RAS-(2-2.
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5. Control System 5.5.3 Prevention control for excessively high discharge gas temperature <60ºC 60ºC CMC: ON 35ºC 35ºC IU demand frequency >90Hz N N Heater control for Indoor Unit 140 SMGB0079 rev.
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5. Control System 5.5.4 Activation for protection device control N Current of the EHW circuit > 10A or >20A Blow EHW fuse 141 SMGB0079 rev.
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5. Control System 5.5.5 Preheating control of compressor RAS-(2-2.5)HVNP / RAS-3HVNC During stopping and operating compressor Other than above During stopping compressor 142 SMGB0079 rev.
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5. Control System 5.5.6 Prevention control for high pressure increase This function is performed to prevent the abnormal condition (Alarm: 02) when the outdoor air flow is decreased by a seasonal wind against air outlet. When the CMC is ON during cooling operation, PSC is ON and Tc is higher than Tc1+4 °C, forced thermo-off operation will be performed. Tc: Outdoor piping temperature. Tc1: Outdoor piping temperature when PSC is ON. PSC ON: 3.60 MPa.
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6. Optional functions 6 . Optional functions Index 6.1. Optional input and output signals (By 7-segment display)................................................................... 146 6.1.1. Available ports.......................................................................................................................................... 146 6.1.2. Available optional signals.........................................................................................................................
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6. Optional functions 6.1 Optional input and output signals (By 7-segment display) The system has several input and output signals, which can be selected using the following connectors of the outdoor unit’s PCB: -- Input connectors CN1 and CN2, which have two and one ports respectively to configure three optional input signals. -- Output connector CN1, which has two ports to configure two optional output signals.
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6.
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6. Optional functions 6.1.2 Available optional signals The outdoor units have the following signals that are described in the following table. These signals are set up through the PCB of the outdoor unit. RAS-(2-2.5)HVNP / RAS-3HVNC Input signals Ind. Input signal Application Port 0 No setting application No setting — 1 Fixing the heating mode This signal allows to pre-fix the operation mode, in this case the heating mode, independently of what the indoor unit requests.
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6. Optional functions RAS-3HVNPE / RAS-(4-12)H(V)N(P/C)(E) Input signals Ind. Input signal Application Port 0 No setting application No setting 1 Fixing the heating mode This signal allows to pre-fix the operation mode, in this case the heating mode, independently of what the indoor unit requests. If the indoor units request the oposite mode than the outdoor unit, the compressor will not start. This is very useful to set up a unique operation mode.
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6. Optional functions 6.1.3 Setting of the optional signals The optional signals of the outdoor unit are set up from the PCB of the outdoor unit and can be selected by pushing switches PSW1, PSW2 and PSW3.
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6. Optional functions 6.1.4 Description of optional signals Input signals RAS-(2-2.5)HVNP / RAS-3HVNC 1 Fixing operation mode (heating / cooling)(1/2) This input function is fixed in terminals CN1 or CN2 of the PCB of the outdoor unit, to use it as a cooling and heating mode. CN1 must be set up as follows. Short circuit between the terminals 1 and 2 of CN1: set heating mode. Short circuit between the terminals 2 and 3 of CN1: set cooling mode.
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6. Optional functions RAS-3HVNPE / RAS-(4-12)H(V)N(P/C)(E) 1 Fixing operation mode (heating / cooling)(1/2) This input function is fixed in terminals CN1 or CN2 of the PCB of the outdoor unit, to use it as a cooling and heating mode. CN1 must be set up as follows. Short circuit between the terminals 1 and 2 of CN1: set heating mode. Short circuit between the terminals 2 and 3 of CN1: set cooling mode.
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6. Optional functions Output signals Operation signal (01) This optional signal is used to pick up the operation signal. It can be used to turn on or off complementary units of the airconditioning system,such as fans, humidifiers, etc. Connect the cabling and use the materials as shown in Available ports. Note that the contact of auxiliary relay X3 is closed when an operation signal is issued. Alarm signal (02) This optional signal is used to pick up the activation of safety devices.
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6. Optional functions 6.2 Optional functions (By 7-segment display) The outdoor unit has several optional functions which can be selected through the 7-segment display of the outdoor unit PCB. 6.2.1 Setting of the optional functions The optional functions of the outdoor unit are set up from the PCB of the outdoor unit and can be selected by pushing switches PSW1, PSW2 and PSW3.
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6.
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6.
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6. Optional functions 6.2.2 Description of the optional functions Control of the indoor unit fan during Thermo-OFF in heating mode (FA) Press PSW1 and select the setting condition “1” at the circulator function at heating thermo-OFF “FA”. In case that the fan speed is changed to “LOW” at heating Thermo-OFF, there is a case that the room air temperature is too high at heating Thermo-OFF. In this case, the circulator function at heating thermo-OFF is recommended, and its function explains below.
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6. Optional functions Cancellation of Outdoor Ambient Temperature Limit (GS) Press “PSW1” and select the setting condition “0” to “3” at the cancellation of outdoor ambient temperature limit of “GS”. Then, this function can be set. The heating operation is continued under a high outdoor temperature or the cooling operation is continued under a low temperature.
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6. Optional functions Slo defrost setting (bJ) Press “PSW1” and select the setting condition “1” at the slow defrost setting “bJ“. Indoor fan operation is stopped during the defrost operation.
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6. Optional functions Fixing on demand function (dE) Press “PSW1” and select the setting condition “1”, so that the fixing of demand function “dE” can be set. However, it is not necessary to short-circuit the demand input terminals on the outdoor unit PCB. (Refer to section Description of optional signals in the input Current control demand) The tables below is the limit of the running current for this function. RAS-(2-2.
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6. Optional functions 6.3 Optional functions (By remote control switch) Additionally to the possible optional functions by the 7-segment display of the outdoor unit’s PCB, there are available a large quantity of optional functions for each remote control switch connected to the system.
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6.
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6.
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6. Optional functions Items Optional function Individual setting Setting condition 00 Function not valid 01 1h 02 2h 03 3h 04-24 F1 Automatic timer OFF setting × F2 Main and secondary remote control setting × F3 Automatic temperature setting release (*3) × F4 Automatic release time × Automatic cooling temperature release (*4) × 0.5 h 0B 1.
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6. Optional functions Items FC Fd FE Optional function Cooling lower limit for setting temperature (*4) Heating upper limit for setting temperature (*5) Not prepared Individual setting × × - Setting condition 00 Standard 01 Lower limit +1ºC 02 Lower limit +2ºC ... ... 09 Lower limit +9ºC 10 Lower limit +10ºC 00 Standard 01 Upper limit –1ºC 02 Upper limit –2ºC ...
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6.
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7. Test run 7 . Te s t r u n Index 7.1. Checking procedure before the test run............................................................................................... 168 7.2. Test run procedure using the remote control switch (PC-ART)............................................................ 170 7.3. Test run procedure using the remote control switch (PC-ARF)............................................................ 172 7.4.
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7. Test run 7.1 Checking procedure before the test run When you have finished the installation, perform the test run according to the following procedure. After performing the test run, hand over the system to the customer. Perform the test run of the indoor units one by one in order. Make sure that the electrical wiring and the refrigerant piping are correctly connected. Start the indoor units one by one in order to make sure that the indoor units are correctly numbered.
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7. Test run • Check to ensure the operating temperature: -- Cooling operation: Indoor DB 21.5 ºC and above, Indoor WB 16 ºC and above, Outdoor DB 0 ºC and above -- Heating operation: Indoor DB 27 ºC and below. (*) About insulation resistance • The insulation may lower during a test run or after being left with the main power OFF for a long time, due to refrigerant accumulation in the compressor.
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7. Test run 7.2 Test run procedure using the remote control switch (PC-ART)  Turn ON the power source of the units Procedure for TEST RUN mode of remote control switch. Depress the MODE and the than 3 seconds. Operation lamp OK switches together for more Counting number of connected units a. If TEST RUN and the counting number of the connected units to the remote control switch (for example ) are  indicated on the remote control switch, the connection of remote control cable is correct.
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7. Test run Remote control switch indication Unit condition Wrong portions Inspection points after power source OFF 1 Connecting order of each terminal boards. 2 Screw fastening of each terminal boards. The operation lamp flickers. (1 time/1 sec.) and the unit number and alarm code 03 flicker. The unit does not start. The power source of outdoor unit in not turned ON. The connecting wires of operating line are incorrect or loosened.  NOTE Recovering method of FUSE for operating circuit.
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7. Test run 7.3 Test run procedure using the remote control switch (PC-ARF) Display Part Schedule Timer Indicator Fan Speed Indicator It is indicated when the schedule timer Swing Louver Indicator Room Name Indicator function is set. Operation Lock Indicator Operation Mode Indicator It is indicated when the operation lock function is set. The indications of “HEAT” and “AUTO” are indicated only for the heat pump type models.
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7. Test run Test Run Setting: 2 units b. Select “Test Run” and press “OK”. The test run settings will be displayed. COOL MED MODE SPEED LOUV. T-RUN TIME 120MIN SEL. ADJ RUN RTN. Test Run Setting: 00 unit COOL MED MODE SPEED NOTE When “00” is indicated, the auto-address function may be performing. Cancel “Test Run” mode and set it again. 4 The total number of the indoor units connected is indicated on the LCD (liquid crystal display).
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7. Test run Test Run: 2 units 9 To finish the test run, press “ ” (run/stop) again or pass over the set test run time. When changing the test run time, press “ ” or “ ” to select “T-RUN TIME”. Then, set the test run time (30 to 600 minutes) by pressing “ ” or “ ” LOUV. T-RUN TIME SEL. -- The RUN indicator on the remote control switch flashes when some abnormalities such as protection devices activated occur during the test run as well as the RUN indicator (orange) on the indoor unit flashes (0.
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7. Test run 7.4 Test run procedure using the wireless remote control switch (PC-LH3A/B) NOTE If the wired remote control switch is used or if multiple units (SET-FREE, DC INVERTER and utopia series) are operating simultaneously, you cannot perform the test run by means of the remote control switch. If that is the case, perform the test run by means of the wired remote control switch. 1 Perform the test run after completing the installation. a. Set the batteries for the remote control switch. b.
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7. Test run c. Alarm code display -- If some malfunction occurs because of the activation of a safety device or any other reason, the red RUN LED blinks (0.5 seconds ON / 0.5 seconds OFF). -- Refer to section Alarm codes on chapter Troubleshooting. -- The alarm code displays the number of blinks of the green DEF LED and the yellow FILTER LED as shown bellow: -- Green DEF LED: Digit 2 of the alarm code blinks. -- Yellow FILTER LED: Digit 1 of the alarm code blinks.
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7. Test run 7.5 Test run procedure from the outdoor unit side The test run procedure from the outdoor unit side is shown below. You can set this DIP switch while the power source is ON. Setting of dip switch DSW1 1 Test Run 2 COOL/HEAT (Setting ON: Heat Operation) 3 COOL / HEAT intermediate season 4 Manual Compressor stop DANGER • Do not touch any other electrical components while you are setting the switches on the PCB.
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7. Test run Manual Defrost  Manual Defrost Operation  Defrost operation is available regar- • dless of frosting condition and total time Starts of heating operation. Press PSW1 for more than 3 seconds during heating operation,  Defrost operation in not performed the defrost operation is started when the temperature of outdoor heat after 2 minutes.This function is exchanger is higher than 10°C, high not available within 5 minutes af- pressure is higher than 3.
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7. Test run 7.6 Check list 7.6.1 Check list on test run MODEL: SERIAL No. COMPRESSOR MFG No.
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7. Test run 21 Does the drain water flow smoothly from the drain pipe? __________ 7.6.2 Check list on compressor CLIENT: MODEL: DATE: Serial N°: Production date: Checker: N° 1 Check item Is THM9 correctly connected? THM9: Discharge gas thermistor Check method (1) Is wire of thermistor correctly connected by viewing? (2) Check to ensure the 7-segment indication of Td when comp. is operating. Td: Temperature of THM9 (1) Check to ensure that thermistor on the top of comp.
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7. Test run Additional information for “Check list on compressor” Check item Additional information (mechanism of compressor failure) 1&2 The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high.
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8. Troubleshooting 8 . Tr o u b l e s h o o t i n g Index 8.1. Initial troubleshooting........................................................................................................................... 184 8.1.1. Checking by means of the 7-segment display.......................................................................................... 184 8.1.2. Failure of the power supply to the indoor unit and the remote control switch........................................... 185 8.1.3.
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8. Troubleshooting 8.1 Initial troubleshooting 8.1.1 Checking by means of the 7-segment display Simple checking procedure by means of the 7-segment display 1 Turn on all the indoor units which are connected to the outdoor unit. 2 Turn on the outdoor unit 3 Auto-addressing starts. (Outdoor unit printed circuit board PCB1). During the auto-addressing, you can check the following items by means of the 7-segment display of the outdoor unit. • Disconnection of the power supply to the Indoor Unit.
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8. Troubleshooting 8.1.2 Failure of the power supply to the indoor unit and the remote control switch • The LED and the LCD are not indicated. • Not operated If the fuses are blown out or a breaker is activated, investigate the cause of the overcurrent and take the necessary action.
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8. Troubleshooting 8.1.3 Abnormal transmission between the remote control switch and the indoor unit • RUN LED on the remote control switch: Flickering every 2 seconds.
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8.
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8.
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8.
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8.
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8. Troubleshooting Cause Check item Action (Turn OFF the main switch) Foreign particles inside of the fan casing Visually inspect it Remove the foreign particles Indoor unit fan runner is hitting the casing Visually inspect it Adjust the position of the fan runner Outdoor unit propeller fan is hitting the shroud Visually inspect it Adjust the position of the propeller fan Faulty Installation Check that each part is tightly fixed Tightly fix each part Liquid ref.
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8. Troubleshooting 8.2 Troubleshooting procedure 8.2.1 Alarm display On-screen displays during abnormal operation • Malfunction The RUN (red) indicator flashes.The ALARM indicator appears on the liquid crystal display.The screen also displays the indoor unit number -A-, the alarm code -B- and the model code -C-. If there are various indoor units connected, the above mentioned information is shown for each one of them -D-.Write down the indications and contact your HITACHI service supplier.
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8. Troubleshooting 8.2.2 Alarm codes for the outdoor and indoor units Code No. Category 01 Indoor unit 02 Outdoor unit Failure of fan motor, drain discharge, PCB, relay, float switch activated. Activation of protection device (high pressure cut) Activation of PSH, locked motor, abnormal operation in the power supply phase. Abnormality between indoor (or outdoor) and outdoor (or indoor) units Incorrect wiring. Loose terminals, Failure of PCB. Tripping of fuse. Power supply OFF.
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8. Troubleshooting 8.2.3 Troubleshooting by alarm code for the outdoor and indoor units Alarm code 01 Activation of the safety device in the indoor unit • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. • The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 02 Activation of the safety device (high pressure switch) in the outdoor unit (Except Alarm codes 41 and 42) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8.
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8. Troubleshooting Alarm code 03 Abnormal transmission between the indoor units and the outdoor unit for RAS-(2-2.5)HVNP / RAS-3HVNC • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. • The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting 198 SMGB0079 rev.
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8. Troubleshooting Phenomenon Cause Blown out fuse for control circuit or activation of outdoor unit breaker Supply the power Short-circuit between the wires Check the insulation material for breaks Remove the short-circuit and replace the fuse Short-circuited wire to ground Measure the insulation resistance Remove short-circuit to ground and replace the fuse Faulty comp. motor Measure the resistance between the wires and the insulation resistance Replace the comp.
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8. Troubleshooting Alarm code 03 Abnormal transmission between the indoor units and the outdoor unit for RAS-(3-12)H(V)N(P/C)(E) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. • The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting 8 201 SMGB0079 rev.
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8. Troubleshooting Disconnected Wire Insufficient Contacting Check continuity and looseness of connection screws. Replacing Wires, Repairing and Tightening Screws Incorrect Wiring Check terminal Nos. Correctly connect wires. Incorrect Wiring 202 SMGB0079 rev.
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8. Troubleshooting NOTE • *1) In the case that the end terminal resistance (DSW5-1) is set to OFF for H-LINK connection, set the end terminal resistance to ON when CN8 is disconnected. Set the end terminal resistance to OFF when CN8 is reconnected.
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8. Troubleshooting Alarm code 04 Abnormal transmission between Inverter PCB and Outdoor PCB1 • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting RAS-(3-6)H(V)NPE 8 NOTE • *1): Surely perform the troubleshooting of the resistance for inrush current prevention (R115/R116) on inverter PCB. If the resistance for inrush current prevention (R115/R116) fails, the abnormal transmitting occurs. • *2): Surely perform the troubleshooting of DC fan motor according to section Procedure of checking other main parts. If the DC fan motor fails, the normal inverter PCB may be damaged.
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8. Troubleshooting RAS-(8-12)HN(P/C)(E) NOTE Surely perform the troubleshooting of DC fan motor according to section Procedure of checking other main parts. If the DC fan motor fails, the normal inverter PCB may be damaged. 206 SMGB0079 rev.
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8. Troubleshooting 05 Alarm code Code abnormal operation of picking up phase signal • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm is displayed when the main power source phase is reversely connected or one phase is not connected.
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8. Troubleshooting Alarm code 06 Excessively low voltage or excessively high voltage for the inverter • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. • The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting RAS-(3-6)H(V)NPE / RAS-(8-12)HN(P/C)(E) 8 NOTE • The indicated voltage is for three phase models. The power supply voltage for single phase models is 220V and 187V during operation. • *1): If capacitor has high voltage, perform the high voltage discharge work refer to the item Procedure of checking other main parts. • *2): Regarding replacing or checking method for the inverter PCB, refer to the item Procedure of checking other main parts. 209 SMGB0079 rev.
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8. Troubleshooting Alarm code 07 Decrease of Discharge Gas Superheat • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Cause Check item Action (Turn OFF the main switch) Ref. cycle is different from the electrical system Check ref. cycle and the electrical system Repair wiring Overcharged Refrigerant Measure pressure Correctly charge refrigerant Faulty Expansion Valve Check expansion valve *1) Replace expansion valve if faulty Fault Replace PCB and check operation Replace PCB if faulty Disconnected Wires for Ex.Valve Control Check connections.
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8. Troubleshooting Alarm code 08 Excessively High Discharge Gas Temperature at the Top of Compressor • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 11 Abnormal operation of thermistor for the indoor unit air inlet temperature (air inlet thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is displayed when the thermistor is short-circuited (less than 0.
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8. Troubleshooting Alarm code 12 Abnormal operation of the thermistor for the indoor discharge air temperature (air outlet thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is displayed when the thermistor is short-circuited (less than 0.
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8. Troubleshooting Alarm code 13 Abnormal operation of the thermistor for the indoor unit heat exchanger liquid pipe temperature (freeze protection thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 14 Abnormal operation of the thermistor for the indoor unit heat exchanger gas pipe temperature (gas piping thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 19 Activation of the protection device for the indoor fan motor (except RCI, RCIM and RPK) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 19 Activation of the protection device for the indoor fan motor (RCI, RCIM) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. • The unit number and the alarm code are displayed on the display of the outdoor unit PCB1. -- This alarm code is displayed when the following conditions occurs three times in 30 minutes.
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8. Troubleshooting Alarm code 19 Activation of the protection device for the indoor fan motor (RPK) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1. -- This alarm code is displayed when the following conditions occurs three times in 30 minutes.
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8. Troubleshooting Alarm code 20 Abnormality of Thermistor for Discharge Gas Temperature (Compressor Thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 21 Abnormality of High pressure sensor for RAS-(3-12)H(V)NP(E) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is indicated when the pressure sensor output voltage decreases (less than 0.1V) or increases (more than 4.
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8. Troubleshooting Alarm code 22 Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient thermistor) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is displayed when the thermistor is short-circuited (less than 0.
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8. Troubleshooting Alarm code 24 Abnormal operation of the thermistor for the evaporating temperature during the heating process (outdoor unit) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting 31 Alarm code Incorrect Capacity Setting or Combined Capacity between Indoor Units and Outdoor Unit • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is indicated when the undefined setting is set to DSW3 on the outdoor unit PCB.
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8. Troubleshooting Alarm code 35 Incorrect Indoor number setting • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, alarm code and unit model code appear alternately on the Set Temperature display of the remote control switch. The alarm code also appears on the outdoor unit PCB display.
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8. Troubleshooting Alarm code 38 Abnormality of Protective Circuit for Protection (Outdoor Unit) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- The alarm code appears if approx.
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8. Troubleshooting 41 Alarm code Cooling Overload (High pressure switch will be activated) for RAS-(2-2.5)HVNP and RAS-3HVNC • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Phenomenon Cause Insufficient Air Flow to Heat Exchanger of Outdoor Unit Check item Action (Turn OFF main switch) Clogging of Heat Exchanger? Remover clogging Check for dust on air filter Remove dust Check the service space Check for outdoor fan speed Excessively High Temp.
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8. Troubleshooting 42 Alarm code Heating Overload (High pressure switch will be activated) for RAS-(2-2.5)HVNP and RAS-3HVNC • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Phenomenon Cause Check item Action (Turn OFF Main Switch) Clogging of Heat Exchanger Activation of High Pressure Switch due to Excessively High Discharge Pressure during Heating Operation Check for dust on air filter Insufficient Air Flow to Heat Exchanger of Indoor Unit Check the service space Excessively High Temp.
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8. Troubleshooting Alarm code 45 Activation of high pressure increase protection device • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- When the compressor is operated with the discharge pressure (Pd) higher than 3.
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8. Troubleshooting Alarm code 47 Activation to Protect System from Excessively Low Suction Pressure (Protection from Vacuum Operation) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- In the case that the evaporating temperature (Cooling: Liquid Refrigerant Piping Temp.
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8. Troubleshooting Alarm code 48 Overcurrent protection activation for RAS-(2-2.5)HVNP and RAS-3HVNC 8 233 SMGB0079 rev.
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8. Troubleshooting Alarm code 48 Restart operation. Does it trip soon? Yes It trips immediately It trips after a certain period Overcurrent protection activation for RAS-(3-12)H(V)N(P/C)(E) Turn OFF power and disconnect U, V, W from compressor terminals. Turn ON #1 of DSW1 on PCB2 (IPM or dipIPM) and restart. Does it trip? *1) No No Is there any cause of instantaneous voltage decrease? Check the compressor. Yes Check the power source capacity. Yes, it trips Replace the PCB2 (IPM or dipIPM).
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8. Troubleshooting Alarm code 51 Abnormal operation of the current sensor (RAS-(2-2.5)HVNP / RAS-3HVNC) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 51 Abnormal operation of the current sensor (RAS-(3-6)H(V)N(P/C)E) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 51 Abnormal operation of the current sensor (RAS-(8-12)HN(P/C)(E)) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code 53 Activation of transistor module (RAS-(2-2.5)HVNP / RAS-3HVNC) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- ISPM has a detection function of the abnormal operation.
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8. Troubleshooting 53 Alarm code Activation of transistor module (RAS-3HVNPE / RAS-(4-6)H(V)NCE) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- IPM or Dip IPM and PCB2 have detecting function of abnormality.
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8. Troubleshooting Alarm code 53 Activation of transistor module (RAS-(4-6)H(V)NPE) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- IPM or Dip IPM and PCB2 have detecting function of abnormality.
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8. Troubleshooting Compressor stops immediately. (Itc=1, 12)* Turn OFF power, disconnect U, V, W from compressor Restart operation. terminals and restart. Does the protecting Compressor function activate? *3) stops after few minutes. Yes It trips. (Itc=1) (Itc=21)* Is heat exchanger clogged? No Normal Check the compressor. Abnormal Yes Failure of Inverter PCB. Replace it. Check the compressor. Replace it if faulty. Remove clogging or Replace heat exchanger.
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8. Troubleshooting Alarm code 53 Activation of transistor module (RAS-(8-12)HN(P/C)(E)) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- IPM or Dip IPM and PCB2 have detecting function of abnormality.
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8.
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8. Troubleshooting Alarm code • 54 Abnormality of inverter fin temperature (RAS-3HVNPE / RAS-(4-6)H(V)N(P/C)E) The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting 54 Alarm code Abnormality of inverter fin temperature (RAS-(8-12)HN(P/C)(E)) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is indicated after the operation is stpped when the following condition occurs three times within 30 minutes.
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8. Troubleshooting Alarm code 55 Abnormality of Inverter Module • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- Actual frequency from Inverter PCB is less than 10 Hz (after inverter frequency output form PCB1 to Inverter PCB).
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8. Troubleshooting Alarm code 57 Abnormality of fan motor protection (DC fan motor) for RAS-(2-2.5)HVNP and RAS-3HVNC • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting 57 Alarm code Abnormality of fan motor protection (DC fan motor) for RAS-(3-6)H(V)NPE and RAS-(8-12)HN(P/C)(E) • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting 57 Alarm code Abnormality of fan motor protection (DC fan motor) for RAS-(4-6)H(V)NCE • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
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8. Troubleshooting Alarm code EE Compressor protection • This alarm code is displayed when one of the following alarms occurs three times within six hours.
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8. Troubleshooting Alarm code b1 Incorrect Setting of Unit and Refrigerant Cycle No. • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. -- This alarm code is indicated in the following condition.
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8. Troubleshooting 8.2.4 Alarm codes for the KPI (E/H/X)3E Series and DX Interface Code No. DXKIT2 KPIS3 KPIActive Category 01 o - o Indoor 03 o - o Transmission Type of Abnormality Main cause Activation of protection device Float switch activation (high water level in drain hose or abnormality in drain pipe, float switch or drain pan). Transmission Error Outdoor fuse meltdown, Indoor/outdoor connection wiring (breaking, wiring error, etc.
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8. Troubleshooting 8.3 Troubleshooting in check mode 8.3.1 Troubleshooting using the remote controller PC-ART Use the “OK” switch of the remote control in the following cases: 1 When the RUN LED is flickering. 2 To trace back the cause of the malfunction after restarting from the stoppage while the RUN LED is flickering. 3 To check during the normal operation or during the stoppage. 4 To monitor the inlet air temperature and the discharge air temperature.
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8. Troubleshooting Although the wireless controller is used for the wall type indoor unit with the built-in receiver part, you can check the alarm code by connecting the PC-P2HTE. Suction grille Connector for check NOTE • The unit does not operate by pressing the operation switch. • The above function is available only when the alarm occurs. • The PCB check using the remote control switch is not available. • The indication is the data when you are connecting PC‑P2HTE.
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8.
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8. Troubleshooting Abnormal operation occurrence counter 15 16 Abnormal operation occurrence counter E1 01 Instantaneous power failure occurrence counter in indoor unit E2 00 Countable up to 99. Over 99 times, “99” is always displayed. NOTE Transmission error occurrence 17 counter between remote control switch and indoor unit E3 00 • If a transmission error continues for three minutes, one is added to the occurrence counter.
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8. Troubleshooting Expansion opening indication 28 Indoor unit expansion valve opening (%) L 20 29 Outdoor unit expansion valve MV1 opening (%) L2 gg 30 Outdoor unit expansion valve MV2 opening (%) L3 gg In case of models without the expansion valve (MV2), the same figure is displayed L4 00 31 Control information Estimated electric current indication 32 Compressor running current (A) P 25 The total current is displayed when several compressors are running.
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8. Troubleshooting Contents of the check mode 2 When more than three indoor units are connected to one remote control switch, the latest data of only the first three indoor units that are connected serially are displayed. If you press the part “” of the TEMP switch, the next display appears. If you press the part “” of the TEMP switch, the previous display appears.
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8. Troubleshooting Self-checking procedure of PCB by means of the Remote Control Switch Use the following troubleshooting procedure for testing the PCB in the indoor unit and the outdoor unit: Press (ex.) Indication of unit No. “0” Indication of unit number After 7 seconds Operating PCB check automatic Indication  Contents Normal Abnormality (open-circuit, short-circuit, etc.
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8. Troubleshooting If you are using a wireless remote control switch with the built-in receiver part of the wall-type indoor unit and you need to perform the above checking, perform the following procedure: 1 2 3 4 Turn OFF the power supply. Disconnect the connector (CN25) on PWB(M). Connect the PC-ART. Turn ON the power supply. After finishing the checking, turn OFF the power supply again and reconnect the connectors according to the previous situation before the checking.
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8. Troubleshooting Self-checking procedure of the remote control switch Cases where the OK switch is used: 1 If the remote control switch displays a malfunction. 2 For the regular maintenance check. 1 2 3 Turn ON the power source Simultaneously press the following three switches. (During the operation, you can press the switches.) The LCD changes as shown in the right figure. No. LCD indication Indicating period (sec.
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8. Troubleshooting The LCD changes as shown below. The detected temperature of the remote control thermostat is displayed at the (A) part in the figure below. 7 The LCD changes as shown below. If the indicators “--” or “FF” are displayed at the “A” part, the remote control thermostat is abnormal. If you press the RESET switch or you leave the switches for 15 seconds, the data of EEPROM (storage cell inside of the remote control switch) is cleared.
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8. Troubleshooting 8.3.2 Troubleshooting using the remote controller PC-ARF Each “Check Menu” item and its function are explained in the following table. Check Menu Item Function Check 1 Sensor condition of air conditioner will be monitored and indicated. Check 2 Sensor data of air conditioner prior to alarm occurrence will be indicated. Alarm History Display Previous alarm record (date, time, alarm code) will be indicated. Model Display Model name and manufacturing number will be indicated. I.
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8. Troubleshooting Check mode 1 items No. Item 1 b1 2 Data Name No. Item Data Name Set Temp. 18 E3 Times of Abnormal Transmitting b2 Inlet Air Temp. 19 E4 Times of Inverter Tripping 3 b3 Discharge Air Temp. 20 F1 Louver Sensor State 4 b4 Liquid Pipe Temp. 21 H1 Discharge Pressure 5 b5 Remote Thermistor Temp. 22 H2 Suction Pressure 6 b6 Outdoor Air Temp. 23 H3 Control Information 7 b7 Gas Pipe Temp. 24 H4 Operating Frequency 8 b8 Evaporating Temp.
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8. Troubleshooting Checking procedure of PCB by means of the Remote Control Switch (1) Press and hold “ ” (menu) and “?” (help) simultaneously for 3 seconds during the normal mode. The check menu is displayed. Check Menu I. U./O. U. PCB Check Self Checking 02 / 02 (2) Select “I.U./O.U. PCB Check” from the check menu and press “OK”. SEL. OK ENT. RTN. I.U./O.U. PCB Check (3) Select the set indoor unit by pressing “ ” and press “OK”.
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8. Troubleshooting Self-checking procedure of PCB by means of the Remote Control Switch The self checking performs to check the remote control switch and to clear EEPROM (storage cell inside of the remote control switch). (1) Press and hold “ ” (menu) and “?” (help) simultaneously for 3 seconds during the normal mode (when unit is not operated). Check Menu I. U./O. U. PCB Check Self Checking The check menu is displayed. 02 / 02 (2) Select “Self Checking” from the check menu and press “OK”. SEL.
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8. Troubleshooting (9) No Function This function is not used. Press “OK” to proceed. Self Checking 07:000 (10) Transmission Circuit Test The remote control switch automatically starts to check the transmission circuit. Self Checking (11) Remote Control Switch Thermistor Test The temperature detected by remote control switch thermistor is displayed at “ A ” in the right figure. 09:025 Self Checking (12) Date/Time Test The date and time is switched from “2012.03.04 12:34” to “2008. 01. 01 00:00”.
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8. Troubleshooting 8.3.3 Troubleshooting using the 7 segment display Simple checking by 7-segment display 1 Turn ON indoor unit connected to the outdoor unit 2 Turn ON the outdoor unit 3 Auto-addressing starts During auto-addressing, the following items can be checked using the outdoor unit’s on-board 7-segment LED display: 1 Disconnection of power supply to the indoor unit. 2 Reverse connection of the operating line between the outdoor and indoor units. 3 Duplication of indoor unit number.
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8. Troubleshooting Check mode items RAS-(2-2.5)HVNP / RAS-3HVNP Item Item Indication data Check No. Indic. Indic.
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8. Troubleshooting RAS-(3-12)H(V)NP(E) Item Item Indication data Check No. Indic. Indic. Input/output state of outdoor microcomputer 01 SC  Capacity of operating indoor unit 02 oP 11 Control software No. 03 SP 11 Inverter software No. 04 iP 11 Inverter order frequency to compressor 05 HI 74 Indicates only for the segments corresponding to the equipment in the figure. (See figure above) 00~199 In case that capacity is higher than 100, the last two digits flash Control Software No.
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8. Troubleshooting RAS-(4-12)H(V)NC(E) Item Item Indication data Check No. Indic. Indic. Input/output state of outdoor microcomputer 01 SC  Capacity of operating indoor unit 02 oP 11 Control software No. 03 SP 11 Inverter software No. 04 iP 11 Inverter order frequency to compressor 05 HI 74 Indicates only for the segments corresponding to the equipment in the figure. (See figure above) 00~199 In case that capacity is higher than 100, the last two digits flash Control Software No.
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8.
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8. Troubleshooting Cancellation of Forced Thermo OFF (21) Turn ON the power source and wait for more than 30 seconds. Then press PSW1 and PSW3 simultaneously for more than 3 seconds. Forced thermo-OFF (indoor unit error code 21) will be cancelled. However, this function may damage the compressor, use only on inevitable occasion. • In case of using the remote control switch (PC-ART), the cancellation is also available with it.
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8. Troubleshooting Protection control code on 7-segment display 1 Protection control code is displayed on 7-segment when a protection control is activated. 2 Protection control code is displayed while function is working, and goes out when released. 3 When several protection control are activated, code number with higher priority will be indicated (see below for the priority order). a. Higher priority is given to protection control related to frequency control than the other.
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8. Troubleshooting Activating condition of protection control code To monitor the conditions such as the temperature change and others, the control of the frequency and other controls are performed by the protection control in order to prevent the abnormal operations. The activating conditions of protection control are shown in the table below: RAS-(2-2.
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8. Troubleshooting RAS-(3-12)H(V)N(P/C)(E) Code Protection control P01 Pressure ratio control P02 High-pressure increase protection P03 Activating condition Remarks Compression ratio ε ≥ 7.5 => frequency decrease Compression ratio ε ≤ 1.6 => frequency increase ε = (Pd+0.1)/(Ps+0.
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8. Troubleshooting 8.4 Checking procedure for main parts 8.4.1 Procedure for checking the DIP-IPM inverter for indoor and outdoor units RAS-(3-6)H(V)N(P/C)E High voltage discharge work for replacing parts C aution Electrical hazard. Risk of electrical shock. Perform this high voltage discharge work to avoid an electric shock. 1 Turn OFF the main switches and wait for three minutes. Make sure that no high voltage exists.
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8. Troubleshooting 1 Touch [+] side of the tester to DIP-IPM 52C terminal, and [-] side to DIP-IPM R, S and T terminals to measure the resistance. Normal if all three terminals have 1 kΩ or greater. 2 Contrary to [1], touch [-] side of the tester to DIP-IPM 52C terminal, and [+] side to DIP-IPM R, S terminals to measure the resistance. Normal if all three terminals have 100 kΩ or greater.
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8. Troubleshooting • ACT circuit of inverter PCB Internal circuit of ACT part of inverter module Non-faulty if [9] – [13] are checked and satisfied. (Measure with 1 kΩ range of a tester.) External Appearance and Internal Circuit of Transistor Module N ote DO NOT use a digital tester. 9 Check items [1] – [8]. 10 Touch [+] side of the tester to DIP-IPM DCL2 terminal, and [-] side to [P] of ISPM/DIP-IPM (soldered part) to measure the resistance.
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8. Troubleshooting • Checking Method of Fuse for fan motor protection (EF1) (Measure the resistance under 1 kΩ range of a circuit tester.) N ote DO NOT use a digital tester. By placing the + and - side of tester to EF1 on inverter PCB, measure the resistance. EF1 If the resistance is 0Ω, it is normal. + - Contact withtospecified terminals Place wires to measure. specified terminal. Tester Circuit Tester Refer to (1) “Detail of Check Points” about details.
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8. Troubleshooting Transistor module checking procedure 1 1 Outer Appearance and Internal Circuit of Transistor Module 1 1 1. Drive circuit. 2. Overheating protection circuit. 3. Sensor. 1 1 1 2 3 Procedure: Remove all the terminals of the transistor module before check. If items [1] – [4] are performed and the results are satisfactory, the transistor module is normal. Measure it under 1kΩ range of a tester. N ote DO NOT use a digital tester.
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8. Troubleshooting Diode module checking procedure Outer appearance and internal circuit of diode module: If items [1] – [4] are performed and the results are satisfactory, the diode module is normal. Measure it under 1kΩ range of a tester. N ote DO NOT use a digital tester. 1 By touching the + side of the tester to the + terminal of diode module and the - side of tester to the ~ terminals (A) of the diode module, measure the resistance. If all the resistances are from 5 to 50kΩ, it is normal.
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8. Troubleshooting 8.4.2 Checking capacitors CB1 & CB2. danger : • Electrical hazard. Risk of serious injuries or death. • Before installing the electrical wiring or before performing a periodical check, turn OFF the main switch of the unit. For safety reasons, be sure that the fan is stopped. • Prevent from touching the capacitors’ terminals. High voltage should be present before discharging them. • Turn off the unit and wait for the LED 201 to be off before touching the components.
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8. Troubleshooting 8.4.3 Fault diagnosis of DC fan motor. When ISPM/DIP-IPM is faulty and Alarm 03, 04 or 53 appears, the fan motor may also be damaged. To prevent ISPM/DIPIPM damage which may result from operation combined with a faulty fan motor, check also if the fan motor is not damaged when ISPM/DIP-IPM is replaced caution • Turn OFF main power before start working. • Working and checking with the power ON may disturb correct diagnosis and may result in failure.
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8. Troubleshooting 8.4.4 Checking procedure for the electronic expansion valve for indoor and outdoor units Indoor unit electronic expansion valve Locked with fully closed Outdoor unit electronic expansion valve Check the liquid pipe temperature during the hea-It is abnormal if the liquid pipe pressure ting process. It is abnormal if the temperaturedoes not increase during the pump down process. does not increase.
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8. Troubleshooting 8.4.6 Checking procedure for other parts Part name Model code Solenoid Valve Coil SR10D VHV-01AP552B1 Reversing Valve Coil STF-G01AG579A1 EU1014D9 EU140XA2 EU180XA1 2YC45HXD 2YC63FXD Compressor E402HHD-36A2 E401HHD-36A2 E507DHD-50A2 E657DHD-65A2 E655DHD-65D2 FC-1/SP Magnet Contactor FC-0/SP 286 SMGB0079 rev.0 - 01/2013 Resistance (Ω) Unit models 1250 RAS-(3-12)H(V)NP(E) RAS-(4-12)H(V)NC(E) (at 20oC) 1473 (at 20oC) 950 (at 75oC) 1.138 (at 75oC) 1.138 (at 75oC) 1.
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8. Troubleshooting Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client: Model: Date: Serie No. Production Date: Checker: No. Check item 1 Is THM9 correctly connected? THM9: Discharge Gas Thermistor 2 Is thermistor THM9 disconnected? Check method Result Remarks 1. Is wire of thermistor correctly connected by viewing? 2. Check to ensure the 7-segment indication of Td when comp. is operating. Td: Temperature of THM9 1.
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8. Troubleshooting Additional Information for “CHECK LIST ON COMPRESSOR” Check item Additional information (mechanism of the compressor failure) 1&2 The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high.
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9. Spare parts 9 . Spare parts Index 9.1. RAS-(2-2.5)HVNP................................................................................................................................ 290 9.1.1. Cycle and structural parts......................................................................................................................... 290 9.1.2. Parts table..........................................................................................................................................
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9. Spare parts 9.1 RAS-(2-2.5)HVNP 9.1.1 Cycle and structural parts LOCATION OF SPARE PARTS IN THE UNIT MODEL: RAS-2HVNP RAS-2.5HVNP U98A U38 U48 U34B U40 U04 U85 U82 U15C U15A U71 U32B U98E U21B U79 U78 U81 U01B U98B U21A U89 U01A U51 U70 U28 U15B U32A U98D U34A U27B U27A Spare Parts Document: EPN-201212A D-RAS-2HVNP-V, D-RAS-2.5HVNP-V - 4 - 290 SMGB0079 rev.
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9. Spare parts 9.1.2 Parts table Cycle and structural parts No. Part name Remarks U01A Pressure SW High pressure U01B Pressure SW For control U04 Fuse 3A U15A Thermistor Ta U15B Thermistor Te U15C Thermistor Td U21A Exp. valve U21B Coil for exp.
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9. Spare parts 9.2 RAS-3HVNC 9.2.1 Cycle and structural parts LOCATION OF SPARE PARTS IN THE UNIT MODEL: RAS-3HVNC U98A U48 U34B U40 U04 U85 U82 U15C U15A U71 U32B U98E U21B U79 U21A U89 U01A U51 U78 U81 U01B U98B U70 U28 U15B U32A U98D U34A U27B U27A Spare Parts Document: EPN-201212A D-RAS-3HVNC-V - 5 292 SMGB0079 rev.
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9. Spare parts 9.2.2 Parts table Cycle and structural parts No. Part name Remarks U01A Pressure SW High pressure U01B Pressure SW For control U04 Fuse 3A U15A Thermistor Ta U15B Thermistor Te U15C Thermistor Td U21A Exp. valve U21B Coil for exp.
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9. Spare parts SUBJECT SERVICE 9.3 RAS-3HVNPE New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS 9.3.1 Cycle and structural parts DATE: Dec’12 PAGE: 4/21 LOCATION OF SPARE PART IN THE UNIT CABINET AND CYCLE RAS-3HVNPE Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 294 SMGB0079 rev.
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SUBJECT SERVICE 9. Spare parts DATE: Dec’12 New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PAGE: 15/21 PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS 9.3.2 Electrical parts LOCATION OF SPARE PART IN THE UNIT ELECTRICAL PARTS RAS-(3/4/5/6)HVNPE A   View from A 9 Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 295 SMGB0079 rev.
PAGE 310
9. Spare parts 9.3.3 Parts name Cycle and structural parts No. Part name Remarks No.
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9. Spare parts 9.4 SERVICE RAS-(4-6)H(V)NPE SUBJECT New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS 9.4.1 Cycle and structural parts DATE: Dec’12 PAGE: 8/21 LOCATION OF SPARE PART IN THE UNIT CABINET AND CYCLE RAS-(4/5/6)H(V)NPE 9 Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 297 SMGB0079 rev.
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SUBJECT SERVICE 9. Spare parts DATE: Dec’12 New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PAGE: 15/21 PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS 9.4.2 Electrical parts LOCATION OF SPARE PART IN THE UNIT ELECTRICAL PARTS RAS-(3/4/5/6)HVNPE A   View from A Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 298 SMGB0079 rev.
PAGE 313
SUBJECT SERVICE DATE: Dec’12 New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PAGE: 17/21 PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS 9. Spare parts LOCATION OF SPARE PART IN THE UNIT ELECTRICAL PARTS RAS-(4/5/6)HNPE  A  View from A 9 Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 299 SMGB0079 rev.
PAGE 314
9. Spare parts 9.4.3 Parts name Cycle and structural parts No. Part name Remarks No.
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9. Spare parts Electrical parts RAS-(4-6)HVNPE No. RAS-(4-6)HNPE Part name Remarks No.
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9. Spare parts SUBJECT SERVICE DATE: Dec’12 9.5 RAS-(4-6)H(V)NCE New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS PAGE: 12/21 9.5.1 Cycle and structural parts LOCATION OF SPARE PART IN THE UNIT CABINET AND CYCLE RAS-4H(V)NCE Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 302 SMGB0079 rev.
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SERVICE PARTS NEWS SUBJECT DATE: Dec’12 New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PAGE: 13/21 Outdoor Units IVX Premium and IVX Standard Series 9. Spare parts LOCATION OF SPARE PART IN THE UNIT CABINET AND CYCLE RAS-(5/6)H(V)NCE 9 Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 303 SMGB0079 rev.
PAGE 318
SUBJECT SERVICE DATE: Dec’12 9. Spare parts New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PAGE: 19/21 PARTS Outdoor Units IVX Premium and IVX Standard Series NEWS 9.5.2 Electrical parts LOCATION OF SPARE PART IN THE UNIT ELECTRICAL PARTS RAS-(4/5/6)HVNCE A   View from A Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 304 SMGB0079 rev.
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SUBJECT SERVICE DATE: Dec’12 New issue of Spare Parts List for HITACHI New DC Inverter UTOPIA PAGE: 21/21 PARTS 9. Spare parts Outdoor Units IVX Premium and IVX Standard Series NEWS LOCATION OF SPARE PART IN THE UNIT ELECTRICAL PARTS RAS-(4/5/6)HNCE A   View from A 9 Spare Parts Document: EPN-201211A Hitachi Air Conditioning Products Europe, S. A. Barcelona (Spain) 305 SMGB0079 rev.
PAGE 320
9. Spare parts 9.5.3 Parts name Cycle and structural parts No. Part name Remarks No.
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9. Spare parts Electrical parts RAS-(4-6)HVNCE No. RAS-(4-6)HNCE Part name Remarks No.
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9. Spare parts 9.6 RAS-(8-10)HN(P/C)E 9.6.1 Cycle and structural parts RAS-(8-10)HNPE Spare Parts Document: EPN-201211B 308 SMGB0079 rev.
PAGE 323
9. Spare parts RAS-(8-10)HNCE 9 Spare Parts Document: EPN-201211B 309 SMGB0079 rev.
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9. Spare parts 9.6.2 Electrical parts Spare Parts Document: EPN-201211B 310 SMGB0079 rev.
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9. Spare parts 9.6.3 Parts name Cycle and structural parts RAS-(8-10)HNPE No. Part name Remarks No.
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9. Spare parts RAS-(8-10)HNCE No. Part name Remarks No.
PAGE 327
9. Spare parts Electrical parts No.
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9. Spare parts 9.7 RAS-12HN(P/C) 9.7.
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9. Spare parts 9.7.
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9. Spare parts 9.7.3 Parts name Cycle and structural parts No. Part name Remarks No.
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9. Spare parts Electrical parts No.
PAGE 332
PAGE 333
10. Servicing 1 0 . Servicing Índice 10.1. Introduction.......................................................................................................................................... 323 10.2. Servicing for Outdoor Units RAS-(2-2.5)HVNP and RAS-3HVNC....................................................... 324 10.2.1. Removing pipe cover................................................................................................................................ 324 10.2.2.
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10. Servicing 10.3.2.7. Removing the compressor..................................................................................................... 350 10.3.2.8. Removing the High pressure switch and Pressure switch for control.................................... 353 10.3.2.9. Opening electrical box (P plate)............................................................................................. 354 10.3.2.10. Removing Reversing valve coil..........................................................
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10. Servicing 10.4. Servicing for Standard Series.............................................................................................................. 391 10.4.1. Outdoor Units RAS-(4-6)H(V)NCE........................................................................................................... 391 10.4.1.1. Removing service cover......................................................................................................... 391 10.4.1.2. Remove outlet grille.....................
PAGE 336
10. Servicing 10.4.3.7. Removing High pressure switch and pressure switch for control........................................... 430 10.4.3.8. Opening electrical box (P-Mounting Plate)............................................................................. 430 10.4.3.9. Removing reversing and solenoid valves coils....................................................................... 431 10.4.3.10. Removing electronic expansion valve coil............................................................
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10. Servicing 10.1 Introduction DANGER • Before performing any of the service operations described in this chapter turn all the main switches off and the place security lockers or convenient warning indicators in order to prevent them from turning on accidentally. • In case of blocked or stucked parts use appropiated tools and eventually lubricants to release them. • In case of sharped edged parts as covers use security gloves to avoid getting injured.
PAGE 338
10. Servicing 10.2 Servicing for Outdoor Units RAS-(2-2.5)HVNP and RAS-3HVNC 10.2.1 Removing pipe cover Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 339
10. Servicing 5 Remove the electrical box cover. 6 Remove the fan motor connector (CN24) inserted into the PCB in the electrical box. Remove the fan motor lead wire fixed onto the motor clamp using a cord band. Remove 4 screws which fixes the motor. 1. Cord band. 1. Cap nut. 1. Electrical box cover. 2. Propeller fan. 2. Fan motor lead wire. 3. Four (4) screws. 4. Fan motor. NOTE • To mount the motor be sure to place the lead wire outlet downward.
PAGE 340
10. Servicing 4 Remove 7 fixing screws and remove the side cover. 1. Electrical box. 2. Heat exchanger. 1 3. Compressor-top thermistor. 4. Compressor wiring. 5. Terminal cover. 6. Side cover Soundproof cover. 2 3 4 6 5 5 Open the soundproof cover wrapped around the compressor and remove the terminal box cover of the compressor body. Disconnect the compressor wires in the terminal box and remove the thermistor on top of the compressor. • Check the wiring color and layout when disconnecting.
PAGE 341
10. Servicing 7 Remove push nuts A and B which fixes the compressor. Lift the compressor and remove from the unit body. (C in the figure does not have a push nut). a. Check if the Faston terminal has any abnormality when replacing the compressor. (Ensure the pull out force greater than 20 N)If the Faston terminal is identified faulty replace to a new one. b. Ensure the fixture of the lead wires. 1. Compressor. 2. Accumulator. 3. Push nut. 4. Vibration-proof rubber. 5. Two push nuts. 6.
PAGE 342
10. Servicing 10.2.6 Removing four-way valve coil 1 2 3 4 5 Remove the pipe cover following Removing pipe cover. Remove 3 fixing screws and remove the upper cover. Remove the front cover following Removing front cover. Remove the electrical box cover. Disconnect the PCN6 connector on the control PCB of the electrical box. 1: PCN6 Connector (Green) 6 Remove 1 fixing screw to remove the 4-way valve coil. 1. 4-way valve. 2. 4-way valve coil. 1 2 3. Screw.
PAGE 343
10. Servicing 7 Hold and disconnect the coil of the expansion valve.The expansion valve coil is equipped with a lock mechanism.Ensure that the coil is locked when replacing. 1. One terminal cover screw. 2. Side cover. 1. Expansion valve coil. 3. Seven side cover screws. 2. Expansion valve body. 4. Three front cover screws. NOTE DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. 10.2.
PAGE 344
10. Servicing 7 Pull up and remove the electrical box. 1. Electrical box cover. 2. Two screws. Removing Display PCB 1 2 3 4 Remove the pipe cover following Removing pipe cover. Remove 1 fixing screw and remove the terminal cover. Disconnect all the wiring connected to the display PCB. Hold the upper part of 4 holders with long nose pliers and remove the display PCB. 1. Display PCB (PWB2). 2. Terminal cover. 3. Long nose pliers. 4. Display PCB. 1 5. Holder.
PAGE 345
10. Servicing Removing other electrical components 1 2 3 4 Remove the pipe cover following Removing pipe cover. Remove 3 fixing screws and remove the upper cover. Remove the electrical box cover. Removing Electrical Components. Remove the fixing screw and remove the reactor. • To mount components be sure to match the wiring connection with the mark band codes. 1 2 3 4 5 6 1. Electrical box cover. 2. Partition plate. 3. Fuse. 4. Electrical box. 5. Reactor. 6. See the note.
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10. Servicing 10.3 Servicing for Premium series 10.3.1 Outdoor unit RAS-3HVNPE 10.3.1.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 347
10. Servicing 10.3.1.3 Removing upper cover 1 Remove the upper cover upward after removing 9 fixing screws. 1. Upper cover. 1 10.3.1.4 Removing bottom service cover and rear cover 1 Remove 5 screws which fix the bottom service cover. Pull and remove the bottom service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 9 screws which fix the rear cover. Pull backward and remove the rear cover.
PAGE 348
10. Servicing 10.3.1.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. Remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4. Screw with spacer.
PAGE 349
10. Servicing 10.3.1.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 4 screws which fix the electrical box. 4 Pull up and remove the electrical box. Electrical Electrical box Box UpperCover cover Upper Removefour 4 screws fixing the Remove (4) fixing screws for electrical box. box electrical NOTE The following wiring must be removed to dismount the electrical box. 1.
PAGE 350
10. Servicing 10.3.1.7 Removing the compressor 1 Remove the service cover upper cover bottom service cover and rear cover following Removing service cover, Removing upper cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Remove the electrical box following Removing electrical box. 3 Collect the refrigerant from the check joint. 4 Remove the valve stay.
PAGE 351
10. Servicing 6 Remove the crankcase heater. 7 Remove the suction pipe and discharge pipe from the compressor. Remove the brazed part after cutting the pipes at “A” by a pipe cutter. NOTE Be sure to separate the blazing burner flame sufficiently from the wires and electrical components around the brazed part in order to avoid burning. Brazing Brazing Part Part Discharge Pipe A Suction Pipe Pipe Suction A 8 Remove 1 nut which fix the compressor and remove it by lifting up.
PAGE 352
10. Servicing 10 Perform in the reverse procedure of removing after replacing the compressor. a. Check if the Faston terminal has any abnormality. (Ensure the pull out force greater than 20 Nm) If the Faston terminal is identified faulty replace with a new one. b. Ensure the fixture of the lead wires. c. Attach the cranckase heater to the compressor without torsion and gap as shown in the figure below.
PAGE 353
10. Servicing 10.3.1.8 Removing the High pressure switch and Pressure switch for control 1 Remove the service cover following Removing service cover. 2 Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. High pressure switch and pressure switch for control 1 Remove the soundproof cover on the compressor. 2 Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control.
PAGE 354
10. Servicing 10.3.1.9 Opening electrical box (P plate) 1 Remove the service cover following Removing service cover in this chapter. 2 Unplug all the connectors of the electrical box. 3 Remove 5 screws which fix the electrical box and open the P plate turning counter clockwise approximately 90°. • Check that the LED201 (red) on the inverter PCB (PCB2) is OFF.
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10. Servicing 10.3.1.11 Removing electronic expansion valve coil 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) and LED1 (Red) are ON to avoid electrical shock. Wait until the LED turn off.
PAGE 356
10. Servicing 10.3.1.13 Removing reversing valve 1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following Removing service cover, Removing bottom service cover and rear cover and Removing upper cover. 2 Remove the reversing valve coil according to Removing Reversing Valve Coil. 3 Remove the electrical box according to Removing Electrical Box. 4 Recover the refrigerant from check joints according to Removing Compressor. 5 Remove the valve stay.
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10. Servicing 10.3.1.14 Removing Electronic expansion Valve and Solenoid Valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Solenoid Valve Coil. 4 Remove the brazed parts as shown in the figures.
PAGE 358
10. Servicing Removing Inverter module 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the Inverter PCB LED turns off. 3 Remove all the wiring connected on the Inverter.
PAGE 359
10. Servicing 10.3.1.16 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
PAGE 360
10. Servicing 10.3.2 Outdoor units RAS-(4-6)H(V)NPE 10.3.2.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 361
10. Servicing 10.3.2.3 Removing upper cover 1 Remove 11 screws fixing the upper cover and remove the upper cover upward. Upper 1 cover 10.3.2.4 Removing the bottom service cover and rear cover 1 Remove 5 screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side. 2 Remove the upper cover according to the item Removing upper cover. 3 Remove 10 screws fixing panel and remove the rear panel by pulling in the arrow direction.
PAGE 362
10. Servicing 10.3.2.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. Remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4. Screw with spacer.
PAGE 363
10. Servicing 10.3.2.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 4 screws which fix the electrical box. 4 Pull up and remove the electrical box. Electrical Electrical box Box UpperCover cover Upper Removefour 4 screws fixing the Remove (4) fixing screws for electrical box. box electrical NOTE The following wiring must be removed to dismount the electrical box. 1.
PAGE 364
10. Servicing 10.3.2.7 Removing the compressor 1 Remove the service cover, bottom service cover and rear cover following Removing service cover and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. PCN8 PCN14 PCN13 PCN7 PCN6 PCN10 PCN5 Y21 Y20A 2 Y20C YCH SEG1 ON 1 SK1 THM7 PCN9 DSW5 CN6 THM8 CN8 CN7 CN5A LED3 Y52C 2 Collect the refrigerant from the check joint.
PAGE 365
10. Servicing 7 Remove the suction pipe and discharge pipe from the compressor. NOTE Be sure to separate the blazing burner flame sufficiently from the wires and electrical components around the brazed part in order to avoid burning. 8 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward. NOTE To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe.
PAGE 366
10. Servicing 10 Perform in the reverse procedure of removing after replacing the compressor. a. Check if the Faston terminal has any abnormality. (Ensure the pull out force greater than 20 Nm). If the Faston terminal is identified faulty replace with a new one. b. Ensure the fixture of the lead wires. c. Surely fix the terminal box by tightening the closing nut (Tightening Torque: 3.0 Nm). d. Attach the top of sound-proof cover to cover surely the compressor. e.
PAGE 367
10. Servicing 10.3.2.8 Removing the High pressure switch and Pressure switch for control 1 Remove the service cover and the bottom service cover following Removing service cover, and Removing bottom service cover and rear cover. 2 Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. High pressure switch and pressure switch for control 1 Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control.
PAGE 368
10. Servicing 10.3.2.9 Opening electrical box (P plate) 1 Remove the service cover following Removing service cover in this chapter. 2 Unplug all the connectors of the electrical box. 3 Remove 5 screws which fix the electrical box and open the P plate turning counter clockwise approximately 90°. • Check that the LED201 (red) on the inverter PCB (PCB2) is OFF.
PAGE 369
10. Servicing 10.3.2.11 Removing electronic expansion valve coil 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. 2 Disconnect the CN5A connector on the control PCB of the electrical box. 3 Hold the coil of the expansion valve and pull out upward.
PAGE 370
10. Servicing 10.3.2.13 Removing reversing valve 1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following Removing service cover, Removing bottom service cover and rear cover and Removing upper cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the reversing valve coil according to Removing Reversing Valve Coil. 4 Remove the reversing valve assemblies from the fixed positions (5 brazing parts). a.
PAGE 371
10. Servicing 10.3.2.14 Removing Electronic expansion Valve and Solenoid Valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Solenoid Valve Coil. 4 Remove the brazed parts as shown in the figures.
PAGE 372
10. Servicing 10.3.2.15 Removing electrical components Removing control PCB (PCB1) 1 Remove the service cover following Removing service cover. 2 Remove all the wiring connected to the control PCB. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. Holder 3 Remove the 6 holders. Clamp the middle part of the holders with long-nose pliers and remove it toward front side.
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10. Servicing 10.3.2.16 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
PAGE 374
10. Servicing 10.3.3 Oudoor units RAS-(8-10)HNPE 10.3.3.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 375
10. Servicing 10.3.3.3 Removing upper cover 1 Remove 11 screws fixing the upper cover and remove the upper cover upward. Upper cover 10.3.3.4 Removing the bottom service cover and rear cover 1 Remove 5 screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side. 2 Remove the upper cover according to the item Removing upper cover. 3 Remove 10 screws fixing panel and remove the rear panel by pulling in the arrow direction.
PAGE 376
10. Servicing 10.3.3.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. Remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4. Screw with spacer.
PAGE 377
10. Servicing 10.3.3.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 6 screws which fix the electrical box. 4 Pull up and remove the electrical box. Upper cover Electrical box Remove the fixing screws NOTE The following wiring must be removed to dismount the electrical box. 1. Remove the reversing valve coil from the reversing valve. : Removing reversing valve coil. 2.
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10. Servicing 10.3.3.7 Removing the compressor 1 Remove the service cover and the bottom service cover following Removing service cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Collect the refrigerant from the check joint. Upper cover 1 NOTE Check Perform the recovery work at the check joint of piping. If not, the refrigerant remains inside.
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10. Servicing 1. Thermistor holder 2. Holder 3. Td Thermistor 4. Thermistor fixing plate 5. Rubber cap Th Thermistor 6. Indication of terminal number 7. Terminal box cover 8. Compressor 9. Compressor wires 10. Fix it with screw 11. Compressor wires (3 wires) A. Details for compressor terminals NOTE • Compressor piping must be connected by brazing. MAKE SURE that any flammable material is not around before heating with burner for the oil inside the piping may flame up.
PAGE 380
10. Servicing 7 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward. NOTE To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe. 8 When brazing the replaced compressor quickly perform the brazing while the compressor side piping is cooled with wet cloth in order to avoid the brazing material from entering the compressor.
PAGE 381
10. Servicing 10.3.3.8 Removing High pressure switch and pressure switch for control 1 Remove the service cover following Removing service cover in this chapter. 2 Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. High pressure switch and pressure switch for control 1 Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control.
PAGE 382
10. Servicing 10.3.3.10 Removing reversing valve coil 1 Remove the service cover following Removing service cover in this chapter. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. 2 Remove the connector (PCN100) on the control PCB (PCB1) of the electrical box. 3 Remove the reversing valve coil by removing 1 screw fixing the coil. 1 1. Upper cover. 8 2. Power Plate. 3. PCN6. 4. Fixing screw for reversing valve coil. 7 5.
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10. Servicing 10.3.3.11 Removing electronic expansion valve coil 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Disconnect the CN5A connector on the control PCB1 of the electrical box. 3 Hold the coil of the expansion valve and pull out upward. It is easier to remove the expansion valve coil if it is rotated while pulling it upward.
PAGE 384
10. Servicing 10.3.3.13 Removing reversing valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Remove the reversing valve coil according to Removing Reversing Valve Coil. 3 Recover the refrigerant from check joints according to Removing Compressor. 4 Remove the reversing valve assemblies from the fixed positions (5 brazing parts). a.
PAGE 385
10. Servicing 10.3.3.14 Removing Electronic expansion Valve and Solenoid Valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Solenoid Valve Coil. 4 Remove the brazed parts as shown in the figures.
PAGE 386
10. Servicing 10.3.3.15 Removing electrical components Removing control PCB (PCB1) and relay PCB (PCB3) 1 Remove the service cover following Removing service cover. 2 Remove all the wiring connected to the control PCB and the relay PCB. Printed Circuit Board (PCB1) DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. Holder 3 Remove the 6 holders for each PCB.
PAGE 387
10. Servicing Removing Diode Module (DM) 1 Disconnect the wirings of terminal + - U V W on the diode module. 2 Remove 2 M5 fixing screws on the diode module. 3 Remove the diode module from the electrical box. 1: 5 Screws (M5) 2: Fixing screw (M5) Removing Transistor Module (IPM) 1 2 3 4 5 Disconnect all the wirings connected to the transistor module. Remove the connectors CN2, CN3, CN206, PCN301 and PCN302 from the transistor module. Disconnect the wirings of P N U V W on the transistor module.
PAGE 388
10. Servicing 10.3.3.16 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
PAGE 389
10. Servicing 10.3.4 Outdoor Units RAS-12HNP 10.3.4.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 390
10. Servicing 10.3.4.3 Removing upper cover 1 Remove 11 screws fixing the upper cover and remove the upper cover upward. Upper cover 10.3.4.4 Removing the bottom service cover and rear cover 1 Remove 5 screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side. 2 Remove the upper cover according to the item Removing upper cover. 3 Remove 10 screws fixing panel and remove the rear panel by pulling in the arrow direction.
PAGE 391
10. Servicing 10.3.4.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. If necessary, remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4.
PAGE 392
10. Servicing 10.3.4.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 6 screws which fix the electrical box. 4 Pull up and remove the electrical box. Remove the fixing screws NOTE The following wiring must be removed to dismount the electrical box. 1. Remove the reversing valve coil from the reversing valve. : Removing reversing valve coil. 2.
PAGE 393
10. Servicing 10.3.4.7 Removing the compressor 1 Remove the service cover and the bottom service cover following Removing service cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Collect the refrigerant from the check joint. Upper cover 1 NOTE Check Perform the recovery work at the check joint of piping. If not, the refrigerant remains inside.
PAGE 394
10. Servicing 1. Thermistor holder 2. Holder 3. Td Thermistor 4. Thermistor fixing plate 5. Rubber cap Th Thermistor 6. Indication of terminal number 7. Terminal box cover 8. Compressor 9. Compressor wires 10. Fix it with screw 11. Compressor wires (3 wires) A. Details for compressor terminals NOTE • Compressor piping must be connected by brazing. MAKE SURE that any flammable material is not around before heating with burner for the oil inside the piping may flame up.
PAGE 395
10. Servicing 7 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward. NOTE To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe. 8 When brazing the replaced compressor quickly perform the brazing while the compressor side piping is cooled with wet cloth in order to avoid the brazing material from entering the compressor.
PAGE 396
10. Servicing 10.3.4.8 Removing High pressure switch and pressure switch for control 1 Remove the service cover following Removing service cover in this chapter. 2 Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. High pressure switch and pressure switch for control 1 Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control.
PAGE 397
10. Servicing 10.3.4.9 Removing reversing and solenoid valves coils 1 Remove the service cover following Removing service cover in this chapter. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. 2 Remove the connectors on the control PCB (PCB1) of the electrical box according to the following picture. 3 Remove the valve coils by removing 1 fixing screw for each coil.
PAGE 398
10. Servicing 10.3.4.10 Removing electronic expansion valve coil 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened.
PAGE 399
10. Servicing 10.3.4.11 Removing reversing valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Remove the reversing valve coil according to Removing Reversing Valve Coil. 3 Recover the refrigerant from check joints according to Removing Compressor. 4 Remove the reversing valve assemblies from the fixed positions (5 brazing parts and 1 flare connection). a.
PAGE 400
10. Servicing 10.3.4.12 Removing Electronic expansion Valve and Solenoid Valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Reversing and Solenoid Valves Coils.
PAGE 401
10. Servicing Removing solenoid valves 1 Remove the brazed parts and the flare connections as shown in the figures. -- Solenoid valve (SVA) Solenoid Valve (SVA) Brazed Parts: 2 -- Solenoid Valve (SVC) Brazed Parts: 2 -- Solenoid Valve (SVF) Flare connections: 2 a. Remove the solenoid valves with cooling the valve bodies by wet cloth. b. Perform the brazing work with attention not to burn the electrical wirings and the piping insulations. c.
PAGE 402
10. Servicing 10.3.4.13 Removing electrical components Removing control PCB (PCB1) 1 Remove the service cover following Removing service cover. 2 Remove all the wiring connected to the control PCB. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. Holder 3 Remove the 6 holders. Clamp the middle part of the holders with long-nose pliers and remove it toward front side.
PAGE 403
10. Servicing Removing Diode Module (DM) 1 Disconnect the wirings of terminal + - U V W on the diode module. 2 Remove 2 M5 fixing screws on the diode module. 3 Remove the diode module from the electrical box. 1: 5 Screws (M5) 2: Fixing screw (M5) Removing Transistor Module (IPM) 1 2 3 4 5 Disconnect all the wirings connected to the transistor module. Remove the connectors CN2, CN3, CN206, PCN301 and PCN302 from the transistor module. Disconnect the wirings of P N U V W on the transistor module.
PAGE 404
10. Servicing 10.3.4.14 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
PAGE 405
10. Servicing 10.4 Servicing for Standard Series 10.4.1 Outdoor Units RAS-(4-6)H(V)NCE 10.4.1.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 406
10. Servicing 10.4.1.3 Removing upper cover 1 Remove the upper cover upward after removing 9 fixing screws. 1. Upper cover. 1 10.4.1.4 Removing bottom service cover and rear cover 1 Remove 5 screws which fix the bottom service cover. Pull and remove the bottom service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 9 screws which fix the rear cover. Pull backward and remove the rear cover.
PAGE 407
10. Servicing 10.4.1.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. Remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4. Screw with spacer.
PAGE 408
10. Servicing 10.4.1.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 4 screws which fix the electrical box. 4 Pull up and remove the electrical box. Electrical Electrical box Box UpperCover cover Upper Removefour 4 screws fixing the Remove (4) fixing screws for electrical box. box electrical NOTE The following wiring must be removed to dismount the electrical box. 1.
PAGE 409
10. Servicing 10.4.1.7 Removing the compressor RAS-4H(V)NCE 1 Remove the service cover upper cover bottom service cover and rear cover following Removing service cover, Removing upper cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Remove the electrical box following Removing electrical box. 3 Collect the refrigerant from the check joint. 4 Remove the valve stay.
PAGE 410
10. Servicing 6 Remove the crankcase heater. 7 Remove the suction pipe and discharge pipe from the compressor. Remove the brazed part after cutting the pipes at “A” by a pipe cutter. NOTE Be sure to separate the blazing burner flame sufficiently from the wires and electrical components around the brazed part in order to avoid burning. Brazing Brazing Part Part Discharge Pipe Suction Pipe Pipe Suction A A 8 Remove 1 nut which fix the compressor and remove it by lifting up.
PAGE 411
10. Servicing Detailof of Spring Spring for Cranckase Detail CrankcaseHeater Heater Crankcase Heater Cranckase Heater Compressor Compressor When attatching When attaching the thespring, spring, pay attention attentio not damage pay not to to damage cranckase heater. thethe crankcase heater. NOTE • To prevent contamination of the refrigerant by water or foreign materials, do not expose the refrigerant parts open to atmosphere for long periods. If necessary, seal pipe ends using caps or tape.
PAGE 412
10. Servicing RAS-(5-6)H(V)NCE 1 Remove the service cover, upper cover, bottom service cover and rear cover following Removing service cover, Removing upper cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Remove the electrical box following Removing electrical box.
PAGE 413
10. Servicing 8 Remove the suction pipe and discharge pipe from the compressor. NOTE Be sure to separate the blazing burner flame sufficiently from the wires and electrical components around the brazed part in order to avoid burning. 9 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward. NOTE To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe.
PAGE 414
10. Servicing 11 Perform in the reverse procedure of removing after replacing the compressor. a. Check if the Faston terminal has any abnormality. (Ensure the pull out force greater than 20 Nm). If the Faston terminal is identified faulty replace with a new one. b. Ensure the fixture of the lead wires. c. Surely fix the terminal box by tightening the closing nut (Tightening Torque: 3.0 Nm). d. Attach the top of sound-proof cover to cover surely the compressor. e.
PAGE 415
10. Servicing 10.4.1.8 Removing the High pressure switch and Pressure switch for control RAS-4H(V)NCE 1 Remove the service cover and the bottom service cover following Removing service cover, and Removing bottom service cover and rear cover. 2 Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. 3 Remove the soundproof cover on the compressor. 4 Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control.
PAGE 416
10. Servicing 10.4.1.9 Opening electrical box (P plate) 1 Remove the service cover following Removing service cover in this chapter. 2 Unplug all the connectors of the electrical box. 3 Remove 5 screws which fix the electrical box and open the P plate turning counter clockwise approximately 90°. • Check that the LED201 (red) on the inverter PCB (PCB2) is OFF.
PAGE 417
10. Servicing 10.4.1.11 Removing electronic expansion valve coil 1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following Removing service cover, Removing bottom service cover and rear cover and Removing upper cover. 2 Disconnect the CN5A connector on the control PCB of the electrical box. 3 Hold the coil of the expansion valve and pull out upward. It is easier to remove the expansion valve coil if it is rotated while pulling it upward.
PAGE 418
10. Servicing 10.4.1.13 Removing reversing valve 1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following Removing service cover, Removing bottom service cover and rear cover and Removing upper cover. 2 Remove the reversing valve coil according to Removing Reversing Valve Coil. 3 Remove the electrical box according to Removing Electrical Box. 4 Remove the electronic expansion valve coil according to Removing Electronic Expansion Valve Coil.
PAGE 419
10. Servicing 10.4.1.14 Removing Electronic expansion valve and Solenoid valve 1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following Removing service cover, Removing bottom service cover and rear cover and Removing upper cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Solenoid Valve Coil.
PAGE 420
10. Servicing Removing Inverter module 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the Inverter PCB LED turns off. 3 Remove all the wiring connected on the Inverter.
PAGE 421
10. Servicing 10.4.1.16 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
PAGE 422
10. Servicing 10.4.2 Outdoor Units RAS-(8-10)HNCE 10.4.2.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
PAGE 423
10. Servicing 10.4.2.3 Removing upper cover 1 Remove 11 screws fixing the upper cover and remove the upper cover upward. Upper cover 10.4.2.4 Removing the bottom service cover and rear cover 1 Remove 5 screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side. 2 Remove the upper cover according to the item Removing upper cover. 3 Remove 10 screws fixing panel and remove the rear panel by pulling in the arrow direction.
PAGE 424
10. Servicing 10.4.2.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. Remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4. Screw with spacer.
PAGE 425
10. Servicing 10.4.2.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 6 screws which fix the electrical box. 4 Pull up and remove the electrical box. Upper cover Electrical box Remove the fixing screws NOTE The following wiring must be removed to dismount the electrical box. 1. Remove the reversing valve coil from the reversing valve. : Removing reversing valve coil. 2.
PAGE 426
10. Servicing 10.4.2.7 Removing the compressor 1 Remove the service cover and the bottom service cover following Removing service cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Collect the refrigerant from the check joint. Upper cover 1 NOTE Check Perform the recovery work at the check joint of piping. If not, the refrigerant remains inside.
PAGE 427
10. Servicing 1. Thermistor holder 2. Holder 3. Td Thermistor 4. Thermistor fixing plate 5. Rubber cap Th Thermistor 6. Indication of terminal number 7. Terminal box cover 8. Compressor 9. Compressor wires 10. Fix it with screw 11. Compressor wires (3 wires) A. Details for compressor terminals NOTE • Compressor piping must be connected by brazing. MAKE SURE that any flammable material is not around before heating with burner for the oil inside the piping may flame up.
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10. Servicing 7 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward. NOTE To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe. 8 When brazing the replaced compressor quickly perform the brazing while the compressor side piping is cooled with wet cloth in order to avoid the brazing material from entering the compressor.
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10. Servicing 10.4.2.8 Removing High pressure switch and pressure switch for control 1 2 3 4 Remove the service cover following Removing service cover in this chapter. Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control. Remove the high pressure switch and the pressure switch for control from the brazed part of discharge piping.
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10. Servicing 10.4.2.10 Removing reversing valve coil 1 Remove the service cover following Removing service cover in this chapter. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. 2 Remove the connector (PCN6) on the control PCB (PCB1) of the electrical box. 3 Remove the reversing valve coil by removing 1 screw fixing the coil. 1 1. Upper cover. 8 2. Power Plate. 3. PCN6. 4. Fixing screw for reversing valve coil. 7 5.
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10. Servicing 10.4.2.11 Removing electronic expansion valve coil 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Disconnect the CN5A connector on the control PCB1 of the electrical box. 3 Hold the coil of the expansion valve and pull out upward. It is easier to remove the expansion valve coil if it is rotated while pulling it upward.
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10. Servicing 10.4.2.13 Removing reversing valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Remove the reversing valve coil according to Removing Reversing Valve Coil. 3 Recover the refrigerant from check joints according to Removing Compressor. 4 Remove the reversing valve assemblies from the fixed positions (4 brazing parts). a.
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10. Servicing 10.4.2.14 Removing Electronic expansion Valve and Solenoid Valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Solenoid Valve Coil. 4 Remove the brazed parts as shown in the figures.
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10. Servicing 10.4.2.15 Removing electrical components Removing control PCB (PCB1) and relay PCB (PCB3) 1 Remove the service cover following Removing service cover. 2 Remove all the wiring connected to the control PCB and the relay PCB. Printed Circuit Board (PCB1) DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. Holder 3 Remove the 6 holders for each PCB.
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10. Servicing Removing Diode Module (DM) 1 Disconnect the wirings of terminal + - U V W on the diode module. 2 Remove 2 M5 fixing screws on the diode module. 3 Remove the diode module from the electrical box. 1: 5 Screws (M5) 2: Fixing screw (M5) Removing Transistor Module (IPM) 1 2 3 4 5 Disconnect all the wirings connected to the transistor module. Remove the connectors CN2, CN3, CN206, PCN301 and PCN302 from the transistor module. Disconnect the wirings of P N U V W on the transistor module.
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10. Servicing 10.4.2.16 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
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10. Servicing 10.4.3 Outdoor Units RAS-12HNC 10.4.3.1 Removing service cover NOTE • Follow the procedure below to remove main parts and components. For mounting follow the reverse procedure of removal. • Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing. Seal the refrigerant cycle when left unattached for a long period.
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10. Servicing 10.4.3.3 Removing upper cover 1 Remove 11 screws fixing the upper cover and remove the upper cover upward. Upper cover 10.4.3.4 Removing the bottom service cover and rear cover 1 Remove 5 screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side. 2 Remove the upper cover according to the item Removing upper cover. 3 Remove 10 screws fixing panel and remove the rear panel by pulling in the arrow direction.
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10. Servicing 10.4.3.5 Removing outdoor fan motor 1 2 3 4 Remove the service cover following Removing service cover. Remove the outlet grille following Remove outlet grille. If necessary, remove the upper cover following Removing upper cover. To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Motor. 4.
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10. Servicing 10.4.3.6 Removing electrical box 1 Remove the service cover following Removing service cover. 2 Remove the upper cover following Removing upper cover. 3 Remove 6 screws which fix the electrical box. 4 Pull up and remove the electrical box. Remove the fixing screws NOTE The following wiring must be removed to dismount the electrical box. 1. Remove the reversing valve coil from the reversing valve. : Removing reversing valve coil. 2.
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10. Servicing Removing the compressor 1 Remove the service cover and the bottom service cover following Removing service cover, and Removing bottom service cover and rear cover. When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall. 2 Collect the refrigerant from the check joint. Upper cover 1 NOTE Check Perform the recovery work at the check joint of piping. If not, the refrigerant remains inside.
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10. Servicing 1. Thermistor holder 2. Holder 3. Td Thermistor 4. Thermistor fixing plate 5. Rubber cap Th Thermistor 6. Indication of terminal number 7. Terminal box cover 8. Compressor 9. Compressor wires 10. Fix it with screw 11. Compressor wires (3 wires) A. Details for compressor terminals NOTE • Compressor piping must be connected by brazing. MAKE SURE that any flammable material is not around before heating with burner for the oil inside the piping may flame up.
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10. Servicing 7 Remove 2 nuts which fix the compressor and remove it by lifting it up with inclining forward. NOTE To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe. 8 When brazing the replaced compressor quickly perform the brazing while the compressor side piping is cooled with wet cloth in order to avoid the brazing material from entering the compressor.
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10. Servicing 10.4.3.7 Removing High pressure switch and pressure switch for control 1 2 3 4 Remove the service cover following Removing service cover in this chapter. Collect the refrigerant from the check joint according to Removing the compressor, in this chapter. Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control. Remove the high pressure switch and the pressure switch for control from the brazed part of discharge piping.
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10. Servicing 10.4.3.9 Removing reversing and solenoid valves coils 1 Remove the service cover following Removing service cover in this chapter. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. 2 Remove the connectors on the control PCB (PCB1) of the electrical box according to the following picture. 3 Remove the valve coils by removing 1 fixing screw for each coil.
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10. Servicing 10.4.3.10 Removing electronic expansion valve coil 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened.
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10. Servicing 10.4.3.11 Removing reversing valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Remove the reversing valve coil according to Removing Reversing Valve Coil. 3 Recover the refrigerant from check joints according to Removing Compressor. 4 Remove the reversing valve assemblies from the fixed positions (4 brazing parts and 1 flare connection). a.
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10. Servicing 10.4.3.12 Removing Electronic expansion Valve and Solenoid Valve 1 Remove the service cover, the bottom service cover and the rear cover following Removing service cover and Removing bottom service cover and rear cover. 2 Recover the refrigerant from check joints according to Removing Compressor. 3 Remove the coils according to Removing Electronic Expansion Valve Coil and Removing Reversing and Solenoid Valves Coils.
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10. Servicing 10.4.3.13 Removing electrical components Removing control PCB (PCB1) 1 Remove the service cover following Removing service cover. 2 Remove all the wiring connected to the control PCB. DANGER DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. Holder 3 Remove the 6 holders. Clamp the middle part of the holders with long-nose pliers and remove it toward front side.
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10. Servicing Removing Diode Module (DM) 1 Disconnect the wirings of terminal + - U V W on the diode module. 2 Remove 2 M5 fixing screws on the diode module. 3 Remove the diode module from the electrical box. 1: 5 Screws (M5) 2: Fixing screw (M5) Removing Transistor Module (IPM) 1 2 3 4 5 Disconnect all the wirings connected to the transistor module. Remove the connectors CN2, CN3, CN206, PCN301 and PCN302 from the transistor module. Disconnect the wirings of P N U V W on the transistor module.
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10. Servicing 10.4.3.14 Removing other electrical components 1 Remove the service cover following Removing service cover in this chapter. 2 Open the P plate turning counter clockwise approximately 90° following Opening electrical box (P plate). • Check that the LED201 (red) on Inverter is OFF when the P plate is opened. DANGER DO NOT touch electrical components while the LED201 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
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11. Electrial checks of main parts 11 . E l e c t r i a l c h e c k s o f m a i n p a r t s Index 11.1. Inverter................................................................................................................................................. 440 11.1.1. Specifications of inverter.......................................................................................................................... 440 11.1.2. Inverter time chart..........................................................
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11. Electrial checks of main parts 11.1 Inverter 11.1.1 Specifications of inverter Applicable model RAS-(4-6)HNPE Applicable power source RAS-(4-6)HNCE RAS-(8-12) RAS-(2-2.5)HVNP HN(P/C)(E) RAS-3HVNC 45.0A 10.5A 3 Phase 400V 50 Hz Output current 24.0A 16.0A RAS-3HVNPE RAS-(4-6)HVNPE RAS-(4-6)HVNCE 1 Phase. 230V 50 Hz Control Method 16.0A 24.0A 16.0A Vector control Range output frequency 20-115HZ Accuracy of frequency 31-115HZ 20-115HZ 0.
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11. Electrial checks of main parts Protection function Applicable model Excessive high or low voltage for inverter RAS-(4-6)HNPE RAS-(4-6)HNCE RAS-(8-12) RAS-(2-2.
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11. Electrial checks of main parts 11.1.2 Inverter time chart Main Circuit Power Source Frequency LOW Frequency HIGH All bit 1 Operation All bit 1 Frequency Instruction Output Voltage Soft Start-Stop (Frequency) The changing speed depends on command from PCB. Failure Signal Activation of Protection Device Overload Signal Output 10sec. Activation of Recovery Charged Indication (LED5, RED) Turn ON 442 SMGB0079 rev.0 - 01/2013 Transmitting Error 30sec.
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11. Electrial checks of main parts 11.1.3 Protective function 1 Excessive high or low voltage for inverter a. Level of detection • When the voltage of direct current is greater than (A) V abnormalities are detected. • When the voltage of direct current is smaller than (B) V abnormalities are detected. Power supply 400V 50Hz 230V 50Hz (A) 750 440 (B) 350 194 b. Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1.
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11. Electrial checks of main parts 5 Fin temperature increase a. Level of detection When the temperature of internal thermistor exceeds more than 80ºC (for 3HP), 90ºC (for 4 to 6HP Premium), 92ºC (for 4 to 6HP Standard) or 100ºC (for 8 to 12HP) an abnormality is detected. b. Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1. c.
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11. Electrial checks of main parts 11.
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11. Electrial checks of main parts 4 If compressor upper part temperature increases excessively the protection control is activated and the compressor is stopped according to the following method.
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11. Electrial checks of main parts 11.3 Electronic expansion valve Micro-computer Pulse signal 2-Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Refrigerant flow control 1. Pulse motor. Precise control 2. Needle.
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11. Electrial checks of main parts 11.4 High pressure protection device If the discharge pressure is excessively high the compressor and the component parts of the refrigeration cycle can be damaged. • High Pressure Switch: In case that the discharge pressure is higher than 4.15 MPa (R410A) the protection control is activated and the compressor is stopped. • Pressure Switch for Control: In case that the discharge pressure is higher than 3.6 MPa (R410A) the protection control might be performed.
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11.
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11. Electrial checks of main parts 11.5 Noise filter (NF) 11.5.1 Noise filter for 3N~ (400V/50Hz) The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals indicated with “LINE” to the power supply side. Items Specifications 4LFB-16830-2FA AC415V 27 A Permissible temperature range -25 ºC to 85 ºC Line Rated current Circuit diagram 450 SMGB0079 rev.
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11. Electrial checks of main parts 11.5.2 Noise filter for 1~ (230V/50Hz) The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals indicated with “LINE” to the power supply side. Specifications Rated current AC230V 30 A Permissible temperature range. -25 ºC to 85 ºC Line LFB-14930-3M Circuit diagram Load Items Model 11 451 SMGB0079 rev.
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11. Electrial checks of main parts 11.6 Capacitor (CB1 CB2) This part is used for changing the alternative current to the direct current for the inverter. Connect two capacitor in line and used. Items Specifications Models LNX2G472MSEAHE Capacity of static electricity 4700 μF Rated voltage 400 VDC Permissible temperature range -25 ºC to 95 ºC 452 SMGB0079 rev.
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11. Electrial checks of main parts 11.7 Reactor (DCL) 11.7.1 Reactor (DCL) for 3N~ (400V/50Hz) This part is used for changing the alternative current to the direct current for the inverter. Items Specifications Character 1.0 mH+10 (at 1 kHz) Rated current 30 A Direct resistance 22.8 mΩ+20 (at 20 °C) Permissible temperature range -20 ºC to 60 ºC 11.7.2 Reactor (DCL) for 1~ (230V/50Hz) This part is used for changing the alternative current to the direct current for the inverter.
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11. Electrial checks of main parts 11.8 Scroll compressor 11.8.1 Reliable mechanism for low vibrating and low sound 1 The rotating direction is definite. 2 The pressure inside of the chamber is high pressure and the surface temperature of the chamber is 60 °C to 110 °C. 11.8.2 Principle of compression 1. The gas is inhaled from the inlet port at the outer frame of the fixed scroll. 2. The gas inside of the compression space is compressed toward the center of the scroll. 3.
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12. Maintenance notes 1 2 . Maintenance notes Index 12.1. General notes....................................................................................................................................... 456 12.1.1. Checking the power source and the wiring connection............................................................................ 456 12.1.2. Burnt-out compressor due to an insufficient refrigerant charge................................................................ 456 12.1.3.
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12. Maintenance notes 12.1 General notes 12.1.1 Checking the power source and the wiring connection Check the following items in the case of abnormal operation: No. 1 Check item Procedure Is the breaker of the fuse cut out? Check the secondary voltage of the breaker and the fuse by means of a tester. Disconnect the secondary side of the transformer and check the voltage by means of a tester.
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12. Maintenance notes 12.1.3 Insufficient cooling performance when a long piping is applied Question and answer for the field work Example 2: Insufficient cooling performance when a long piping is applied Phenomenon Sufficient cooling was not available for an indoor unit that was located at the farthest position. If the location of an outdoor unit is 20 meters lower than the location of the indoor units resetting of the DIP switch DSW3 is required. However no setting was performed.
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12. Maintenance notes 12.1.5 Alarm code “31” Question and answer for the field work Example 4: Alarm code “31” Phenomenon Alarm code “31” sometimes occurred and the system stopped. The combination of the indoor units and the outdoor unit was the following. ON Power Source ON OFF ON ON ON Cause This system was used in a tenant building. One of tenant’s customers turned off the main switch for the indoor unit while other indoor units are running.
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12. Maintenance notes 12.2 Maintenance work For the indoor unit and the outdoor unit 1 Fan and fan motor • Lubrication: All the fan motors are pre-lubricated and sealed at the factory. Therefore no lubrication maintenance is required. • Sound and vibration: Check for abnormal sounds and vibrations. • Rotation: Check the clockwise rotation and the rotating speed. • Insulation: Check the electrical insulation resistance.
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12. Maintenance notes 12.3 Service and maintenance record No. Check item Action Judgement 1 Is the service area sufficient? — Yes No 2 Is there a short circuit of the discharged air? — Yes No 3 Any heat influence? — Yes No 4 Is the ground wire connected? — Yes No 5 Refrigerant piping. — Good Not Good 6 Fixing the units. — Good Not Good 7 Is there any damage on the outer surface or the internal surface? — Yes No 8 Checking the screw and the bolts.
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12. Maintenance notes 12.4 Service and maintenance record using the 7-segment display Customer’s name:________________________________ Date:____________________ RAS(Serial No. ) Outdoor unit model (serial No. ) RAS(Serial No. ) 1. Operation mode 2. Test run start time 3. Data collect start time 4. Read out data from 7-segment in outdoor unit 4.1 Protection control code 4.2 Total capacity of I.U connected CP 4.3 Input/output state of outdoor micro-computer SC 4.
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12. Maintenance notes Customer’s name:________________________________ Date:____________________ RAS(Serial No. ) Outdoor unit model (serial No. ) 8.2 Liquid pipe temp. of I.U. (Freeze protection) LA 8.3 I.U. intake air temp. iA 8.4 I.U. discharge air temp. oA 8.5 Cause of I.U. stoppage dA NOTE • O.U.: Outdoor Unit. • I.U.: Indoor unit. • FAN1 FAN2: Constant speed fan. • 52C: CMC. • PSH: High pressure switch. • 20A: Solenoid valve (SVA). • 20F: Solenoid valve (SFV).
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12. Maintenance notes 12.5 Service and maintenance record by remote control switch Data sheet for checking by remote control switch Time : : : : : 1·2 1·2 1·2 1·2 1·2 I.U. modelo I.U. serial No. I.U. No. / alarm code Check mode 1 Check mode 2 B Temp. indication Set temp. b1 -- Inlet air temp. b2 91 Discharge air temp. b3 92 Liquid pipe temp. b4 93 Remote thermistor temp. b5 -- Outdoor air temp. b6 94 Gas pipe temp. b7 95 Evaporating temp.
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12. Maintenance notes 12.6 Pump-down method for replacing the compressor No. Procedure Remarks 1 Turn off the main switch of the outdoor unit. 2 Remove the covers the thermistor the crankcase heater the power wirings and other items according to the chapter 10. Make sure that the terminal part of the detached power supply wires is not exposed by the winding insulation tape and other items.
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Hitachi Air Conditioning Products Europe, S.A. Ronda Shimizu, 1 - Polig. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain Hitachi certifies that our products have met EU consumer safety, health and environmental requirements. Hitachi Air Conditioning Products Europe, S.A.