Service manual

ManualsBrandsMitsubishi ManualsHeat PumpMS-18RV

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················6

3. INDOOR / OUTDOOR

CORRESPONDENCE TABLE ···························8

4. SPECIFICATION·················································9

5. NOISE CRITERIA CURVES·····························15

6. OUTLINES AND DIMENSIONS ·······················18

7. WIRING DIAGRAM ··········································22

8. REFRIGERANT SYSTEM DIAGRAM··············28

9. PERFORMANCE CURVES······························40

10. MICROPROCESSOR CONTROL ····················75

11. SERVICE FUNCTIONS·····································86

12. TROUBLESHOOTING······································88

13. DISASSEMBLY INSTRUCTIONS···················105

14. PARTS LIST····················································116

Wireless type

Models

MSC-A07WV -

(

)

· MU-A07WV -

MSC-A09WV -

(

)

· MU-A09WV -

MSC-A12WV -

(

)

· MU-A12WV -

MSC-A07WV -

(

)

· MUH-A07WV -

MSC-A09WV -

(

)

· MUH-A09WV -

MSC-A12WV -

(

)

· MUH-A12WV -

Multi system type

Models

MSC-A07WV -

(

)

· MUX-A10WV -

MSC-A09WV -

(

)

· MUX-A19WV -

MSC-A12WV -

(

)

· MUX-A20WV -

· MUX-A25WV -

· MUX-A26WV -

E1E1

MSC-A07WV -

MSC-A09WV -

MSC-A12WV -

No. OB307

REVISED EDITION-C

HFC

utilized

R410A

SPLIT-TYPE, AIR CONDITIONERS

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Revision C:

● MUX-A10/A19/A20/A25/A26WV - can be

connected to MSC-A07/A09/A12YV -

Indication of

model name

Remote

controller

NOTE:

•As for indoor units MSC-A07/A09/A12YV - , refer to the service manual OB329.

•As for outdoor units MUX-A22WV - , refer to the service manual OB318 REVISED EDITION-A.

•As for outdoor units MXZ-A18/A26/A32WV - , refer to the service manual OB319.

Please void OB307 REVISED EDITION-B.

OB307C-1.qxp 04.5.11 1:16 PM Page 1

Summary of content (128 pages)

PAGE 1
OB307C-1.qxp 04.5.11 1:16 PM Page 1 Revision C: ● MUX-A10/A19/A20/A25/A26WV - E1 can be connected to MSC-A07/A09/A12YV - E1 . SPLIT-TYPE, AIR CONDITIONERS SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS Please void OB307 REVISED EDITION-B. No.
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OB307C-1.qxp 04.5.11 1:16 PM Page 2 Revision C: •MUX-A10/A19/A20/A25/A26WV - 1 E1 can be connected to MSC-A07/A09/A12YV - TECHNICAL CHANGES MSC-07RV- E4 ➔MSC-A07WV- E1 MSC-09RV- E4 ➔MSC-A09WV- E1 MSC-12RV- E4 ➔MSC-A12WV- E1 1. Rated voltage has changed. (220-240V➔230V) 2. Indoor model has changed. MU-07RV- E4 ➔MU-A07WV- E1 1. Refrigerant has changed. (R22➔R410A) 2. Compressor has changed. (RH130VGCT➔RN092VHSHT) MU-09RV- E4 ➔MU-A09WV- E1 1. Refrigerant has changed. (R22➔R410A) 2.
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OB307C-1.qxp 04.5.11 1:16 PM Page 3 INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT • This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer. • Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners. 1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/ materials are required. Refer to the table below.
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OB307C-1.qxp 04.5.11 1:16 PM Page 4 Conversion chart of refrigerant temperature and pressure (MPa [Gauge]) 4.0 Saturated liquid pressure 3.5 R410A 3.0 R22 2.5 2.0 NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system). 1.5 1.0 f [Gauge]) The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f 0.5 0.0 -0.5 -30 -20 -10 0 10 20 30 40 50 60 (:) 1.
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OB307C-1.qxp 04.5.11 1:16 PM Page 5 2 Flaring work and flare nut Flaring work for R410A pipe differs from that for R22 pipe. For details of flaring work, refer to Installation manual “FLARING WORK”. Dimension of flare nut Pipe diameter mm R410A R22 6.35 17 17 9.52 22 22 12.7 26 24 3.Refrigerant oil Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces. 4.Air purge • Do not discharge the refrigerant into the atmosphere.
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OB307C-1.qxp 04.5.
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OB307C-1.qxp 04.5.11 1:16 PM Page 8 REMOTE CONTROLLER MSC-A07WV - E1 MSC-A09WV - E1 MSC-A12WV - E1 Signal transmitting section Operation display section PM AM OPERATE /STOP (ON /OFF)button TOO ON/OFF WARM TOO COOL TEMPERATURE buttons Open the front lid. CLOCK PM AM TOO ON/OFF WARM FAN SPEED CONTROL button TOO COOL FAN STOP VANE START OFF-TIMER button ON-TIMER button HR. button MIN. button (TIME SET button) I FEEL COOL HEAT /FAN DRY / HR.
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OB307C-1.qxp 04.5.11 1:16 PM 4 Page 9 SPECIFICATION Indoor model Function Indoor unit power supply Special remarks Fan motor Electrical data Capacity Air flow(High/Med.w/Low w ) Power outlet Running current Power input Power factor Starting current Fan motor current Model Winding resistance(at 20:) Dimensions WOHOD Weight Air direction Sound level(High/Med.w/Loww ) Fan speed (High/Med.
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OB307C-1.qxp 04.5.11 1:16 PM Page 10 Indoor model Function Indoor unit power supply Special remarks Fan motor Electrical data Capacity Air flow(High/Med.w/Low w) Power outlet Running current Power input Power factor Starting current Fan motor current Model Winding resistance(at 20:) Dimensions WOHOD Weight Air direction Sound level(High/Med.w/Loww ) Fan speed(High/Med.
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OB307C-1.qxp 04.5.11 1:16 PM Page 11 NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV). Outdoor model Function Outdoor unit power supply Special remarks Fan motor Compressor Capacity Dehumidification Outdoor air flow Power outlet Running current Power input Auxiliary heater Power factor Starting current Compressor motor current Fan motor current kW R/h K /h A A W A(kW) % A A A Coefficient of performance (C.O.
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OB307C-1.qxp 04.5.11 1:16 PM Page 12 NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV). Outdoor model Function MUX-A20WV Cooling Single phase 230V,50Hz Outdoor unit power supply Single A 2.6 0.
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OB307C-1.qxp 04.5.11 1:16 PM Page 13 NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV). Outdoor model Function Outdoor unit power supply Capacity kW Dehumidification R/h Outdoor air flow K /h Power outlet A Running current A Power input W Auxiliary heater A(kW) Power factor % Starting current A Compressor motor current A Fan motor current A Coefficient of performance (C.O.
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OB307C-1.qxp 04.5.11 1:16 PM Page 14 NOTE: As for specification of indoor unit, refer to page 9 (MSC-A07/A09/A12WV) or OB329 (MSC-A07/A09/A12YV). Outdoor model Function Outdoor unit power supply Capacity kW Dehumidification R/h Outdoor air flow K /h Power outlet A Running current A Power input W Auxiliary heater A(kW) Power factor % Starting current A Compressor motor current A Fan motor current A Coefficient of performance (C.O.
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04.5.11 1:16 PM Page 17 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 FUNCTION SPL(dB(A)) COOL 52 Test conditions. Cooling :DB35: 90 MUX-A26WV - E1 LINE WB24: 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE SPL(dB(A)) COOL 52 LINE WB24: 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 NC-20 10 FUNCTION Test conditions. Cooling :DB35: 90 OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.
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OB307C-1.qxp 04.5.11 1:16 PM 6 Page 18 OUTLINES AND DIMENSIONS Unit: mm 81.5 4.5 133.5 231.5 Installation plate INDOOR UNIT Indoor unit 271 MSC-A07WV - E1 MSC-A09WV - E1 81.5 326 42 41 2.5 783 81.5 326 Wall hole [65 215 Air in 149 606 58 { 90 30 60 5 Installation plate 7 or more 278 815 162 Power supply cord Lead to right 1.0m Lead to left 0.3m Drain hose [16 (Connected part O,D) Insulation [28 110 Air out 19 Liquid line [6.35-0.5m Gas line [9.52-0.43m Insulation [37 O.
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OB307C-1.qxp 04.5.11 1:16 PM Page 19 MU-A07WV - E1 MU-A09WV - E1 MU-A12WV - E1 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 100mm or more Unit: mm REQUIRED SPACE OUTDOOR UNIT 100 mm ore m 00m or m 1 or m ore Air in 320 32 ore or m 35 0m 255 285 320 109 mm 400 m or mo re Air in Drainage 3holes [33 147 110 Air out 25 Service panel 10 155 90 260 43- 35- 540 Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.
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OB307C-1.qxp 04.5.11 1:16 PM Page 20 Unit: mm 100mm or more OUTDOOR UNIT REQUIRED SPACE MUX-A10WV- E1 Air in ore m 00m 1 100 mm 320 or m or m 255 285 320 109 32 ore ore rm Air in o 0mm 40 Drainage 3holes [33 147 35 110 Air out 0m m 25 or mo re Service panel 10 122 500 780 40 10- 226 176 126 76 260 540 Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35 120 56 MUX-A19WV- E1 Gas refrigerant pipe joint Refrigerant pipe (flared) [9.
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OB307C-1.qxp 04.5.
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OB307C-1.qxp 04.5.11 1:16 PM Page 22 Open as a rule 500mm or more if the front and both sides are open OUTDOOR UNIT MUX-A26WV- E1 100mm or more 360 330 125 34 100mm or more 200mm or more if there are obstacles to both sides 40 30 438 273 Air in 100 Drainage 3 holes {33 Unit: mm Air in Air out 500 840 121 65 61 Open as a rule 500mm or more if the back, both sides and top are open 350mm or more Service panel C Unit B Unit A Unit Gas refrigerant pipe joint Refrigerant pipe (flared) {12.
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OB307C-1.qxp 04.5.
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OB307C-1.qxp 04.5.11 1:16 PM Page 24 MUX-A10WV - E1 MODEL WIRING DIAGRAM TB1 2 1 BLU 2 BLU 1 BLU 21R1BLU BLU 2 BLU BLU 1 X2 8 ORN C C1 RED S MC WHT 1 BLU BLU 2 52C BLU 21R2 BLU F62 5 X1 1 3 6 X1 2 4 BRN BRN X1 8 BLK YLW7 NAME SYMBOL BRN F61 BLU DSAR TB2 WHT7 1 WHT 1 TB3 5 X2 1 BRN 2 WHT WHT BRN CIRCUIT BREAKER FROM INDOOR UNIT No.B CONNECTING 12V COM N PE FROM INDOOR UNIT No.
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OB307C-1.qxp 04.5.11 1:16 PM Page 25 MUX-A19WV - E1 MUX-A25WV - E1 MODELS WIRING DIAGRAM OUTDOOR UNIT POWER SUPPLY TB1 L ~/N 230V N 50Hz 2 1 BLU ORN BRN BLU BRN BRN BLU 3 X521 T61 WHT C2 RED S BLK R MC2 C WHT 2 3 4 5 6 WHT BLK CN91 1 4 4 X522 NR61 3 2 1 3 BLK R MC1 C RED LD2 RED LD1 YLW X521 X522 RED 1 3 2 1 F61 BLU 3 2 1 CN90 OUTDOOR CONTROL P.C.
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FROM INDOOR UNIT C CONNECTING 12V FROM INDOOR UNIT A CONNECTING 12V FROM INDOOR UNIT B CONNECTING 12V 26 3 2 WHT 1 CN91 COMPRESSOR CONTACTOR(MC1) COMPRESSOR CONTACTOR(MC2) SOLENOID COIL SOLENOID COIL (B) X521 X522 21RB 21R3 21R4 OUTDOOR FAN RELAY RELAY (21RB) RELAY (C) (21R4) RELAY (B) (21R3) TERMINAL BLOCK SR861 SR863 SR865 OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE(3.15A) COMPRESSOR(INNER PROTECTOR) COMPRESSOR(INNER PROTECTOR) C61 DSAR F61 MC1 MC2 SOLENOID COIL (C) NOTE:1.
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2 SR865 SR866 SR867 SR868 FUSE(3.
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OB307C-1.qxp 8 04.5.11 1:16 PM Page 28 REFRIGERANT SYSTEM DIAGRAM Unit:mm MU-A07WV - E1 MU-A09WV - E1 MSC-A07WV - E1 MSC-A09WV - E1 INDOOR UNIT Indoor heat exchanger Refrigerant pipe [9.52 (with heat insulator) OUTDOOR UNIT Stop valve (with service port) Muffler Indoor coil thermistor RT12 Outdoor heat exchanger Flared connection Room temperature thermistor RT11 Compressor Flared connection Strainer Capillary tube [3.0x[1.4x500(MU-A07WV) [3.0x[1.
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OB307C-1.qxp 04.5.11 1:16 PM Page 29 Unit:mm MSC-A07WV - E1 MSC-A09WV - E1 INDOOR UNIT Indoor heat exchanger Indoor coil thermistor RT12 MUH-A07WV - E1 MUH-A09WV - E1 Refrigerant pipe [ 9.52 (with heat insulator) Flared connection OUTDOOR UNIT 4-way valve Defrost thermistor RT61 Stop valve (with service port) Muffler Outdoor heat exchanger Room temperature thermistor RT11 Compressor Capillary tube [3.0x[1.6x350(MUH-A07WV) [3.0x[1.
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OB307C-1.qxp 04.5.11 1:16 PM Page 30 MAX. REFRIGERANT PIPING LENGTH Refrigerant piping Piping size O.D : mm Max. length : m Model { MSC-A07WV MU-A07WV { MSC-A09WV MU-A09WV { MSC-A12WV MU-A12WV - A Gas 20 9.52 Liquid Indoor unit Outdoor unit Gas 0.43 Gas 0 Liquid 0.5 Liquid 0 E1 E1 E1 6.35 E1 E1 12.7 25 E1 Refrigerant piping Piping size O.D : mm Max. length : m Model { MSC-A07WV MUH-A07WV { MSC-A09WV MUH-A09WV { MSC-A12WV MUH-A12WV - Length of connecting pipe : m A Gas 20 9.
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OB307C-2.qxp 04.5.11 1:17 PM Page 31 MUX-A10WV- E1 INDOOR UNIT OUTDOOR UNIT Room temperature thermistor RT11 Refrigerant pipe 9.52 (With insulation) Strainer UNIT A Unit : mm Indoor heat exchanger Stop valve with service port Solenoid valve 21R Capillary tube [3.0 x [1.4 x 1000 Muffler Flared connection Refrigerant pipe 6.
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OB307C-2.qxp 04.5.11 1:17 PM Page 32 Unit : mm MUX-A19WV- E1 INDOOR UNIT OUTDOOR UNIT Room temperature thermistor RT11 UNIT A Refrigerant pipe 12.7 (With insulation) Indoor heat exchanger Stop valve with service port Muffler Flared connection Indoor coil thermistor RT12 Room temperature thermistor RT11 Compressor(A) Stop valve Refrigerant pipe 6.35 (With insulation) Capillary tube Strainer Outdoor heat exchanger [3.0 x [1.4 x 850 Refrigerant pipe 9.
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OB307C-2.qxp 04.5.11 1:17 PM Page 33 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit B Indoor unit A LA H H LB Outdoor unit MUX-A19WV - E1 UNIT No. Max. limits Pipe length Height difference (H) No.
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OB307C-2.qxp 04.5.11 1:17 PM Page 34 Unit : mm MUX-A20WV- E1 INDOOR UNIT OUTDOOR UNIT Room temperature thermistor RT11 UNIT A Refrigerant pipe 9.52 (With insulation) Indoor heat exchanger Muffler Stop valve with service port Flared connection Indoor coil thermistor RT12 Room temperature thermistor RT11 Compressor(A) Stop valve Capillary tube Refrigerant pipe 6.35 (With insulation) Refrigerant pipe 9.
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OB307C-2.qxp 04.5.11 1:17 PM Page 35 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit C Indoor unit B H LA LB H LC H Outdoor unit MUX-A20WV - E1 UNIT No. Max. limits Pipe length A LA B LB C LC Height difference (H) No.
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OB307C-2.qxp 04.5.11 1:17 PM Page 36 Unit : mm MUX-A25WV- E1 INDOOR UNIT OUTDOOR UNIT Room temperature thermistor RT11 UNIT A Refrigerant pipe 12.7 (With insulation) Indoor heat exchanger Stop valve with service port Muffler Flared connection Indoor coil thermistor RT12 Room temperature thermistor RT11 Compressor(A) Stop valve Refrigerant pipe 6.35 (With insulation) Capillary tube Strainer Outdoor heat exchanger [3.0 x [1.4 x 700 Refrigerant pipe 12.
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OB307C-2.qxp 04.5.11 1:17 PM Page 37 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit B H LA LB H Outdoor unit MUX-A25WV - E1 UNIT No. Max. limits Pipe length Height difference (H) No.
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OB307C-2.qxp 04.5.11 1:17 PM Page 38 MUX-A26WV- E1 INDOOR UNIT Room temperature thermistor RT11 OUTDOOR UNIT Refrigerant pipe {12.7 (With insulation) Strainer UNIT A Unit : mm Indoor heat exchanger Stop valve with service port Solenoid valve 21RA Capillary tube [3.0 x [1.4 x 1000 Muffler Flared connection Indoor coil thermistor RT12 Room temperature thermistor RT11 UNIT B Refrigerant pipe {6.35 (With insulation) Solenoid valve 21R1 Stop valve Strainer Capillary tube [3.0 x [1.
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OB307C-2.qxp 04.5.11 1:17 PM Page 39 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A LA Indoor unit B H Indoor unit C LB H LC Indoor unit D H LD H Outdoor unit MUX-A26WV- E1 UNIT No. Max. limits Pipe length A LA B LB Height difference (H) LA 15m + C LC D LD 15m LB 15m LC + 15m LD No. of bends Total 30m 10m 10 10m 10 Total 30m 10m 10 10m 10 Total 15 Total 15 ADDITIONAL REFRIGERANT CHARGE (R410A:g) UNIT No.
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04.5.11 1:17 PM Page 41 8.8 9.7 7.1 8.0 8.8 6.4 7.2 7.9 5.8 6.5 7.1 5.1 5.1 6.3 MSC-A12WV - E1 (MUH-A12WV - E1 ) 9.6 10.6 7.8 MSC-A09WV - E1 (MUH-A09WV - E1 ) 8.5 MSC-A07WV - E1 (MUH-A07WV - E1 ) 18.8 23.3 16.3 17.2 21.4 14.8 15.7 19.4 13.3 14.1 17.5 11.8 12.5 15.5 10.4 11.0 13.6 8.9 9.4 11.7 MSC-A12WV - E1 (MUH-A12WV - E1 ) 20.4 25.2 17.8 MSC-A07WV - E1 (MUH-A07WV - E1 ) 19.2 MSC-A09WV - E1 (MUH-A09WV - E1 ) OB307C-2.
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04.5.11 1:17 PM Outdoor low pressure (kgf/F[Gauge])(MPa[Gauge]) 12 1.2 11 1.1 10 1.0 9 0.9 8 0.8 7 0.7 15 Page 42 MU-A09WV - E1 230V 20 50 25 60 30 70(%) 3.5 230V 3.0 2.5 2.0 15 35(:) 1.2 11 1.1 10 1.0 9 0.9 8 0.8 7 0.7 15 MU-A12WV - E1 230V 20 50 25 60 30 70(%) 12 1.2 11 1.1 10 1.0 230V 5.0 4.0 3.0 15 35(:) MUH-A07WV - E1 8 0.8 7 0.7 15 20 50 25 60 30 70(%) 1.2 11 1.1 10 1.0 9 0.9 8 0.8 7 0.7 15 2.5 4.
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04.5.11 1:17 PM Page 43 MUH-A12WV - E1 (kgf/F[Gauge])(MPa[Gauge]) Outdoor low pressure 13 12 11 10 9 8 7 1.2 230V 1.1 1.0 0.9 0.8 0.7 15 20 50 25 60 MUH-A12WV - E1 6.0 1.3 Outdoor unit current (A) OB307C-2.qxp 30 70(%) 5.0 230V 4.0 3.0 2.0 15 35(:) 20 50 25 60 35(:) 30 70(%) Ambient temperature(˚C) Ambient humidity(%) Ambient temperature(˚C) Ambient humidity(%) HEAT operation Condition indoor:Dry bulb temperature 20.0°C Wet bulb temperature 14.5°C MUH-A07WV - E1 3.5 230V 3.0 2.
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OB307C-2.qxp 04.5.11 1:17 PM Page 44 9.4 10.2 9.4 9.5 10.8 10.2 10.2 10.3 8.6 9.4 8.6 8.7 9.9 9.4 9.4 9.4 7.8 8.5 7.8 7.9 9.0 8.5 8.5 8.6 7.1 7.7 7.1 7.1 8.1 7.7 7.7 7.7 6.3 6.9 6.3 6.4 7.3 6.9 6.9 6.9 5.6 6.1 5.6 5.7 6.4 6.1 6.1 6.
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OB307C-2.qxp 04.5.11 1:17 PM Page 45 MUX-A20WV- E1 10 1.0 230V 8 0.8 7 0.7 6 0.6 25 30 (˚C) 20 60 70 (%) 50 Ambient temperature(˚C) Ambient humidity(%) Outdoor low pressure (kgf/F[Gauge]) 11 1.1 9 0.9 (kgf/F[Gauge])(MPa[Gauge]) Single operation (Unit B or C) 0.9 6.0 9 5.0 4.0 230V 3.0 2.0 25 30 (˚C) 20 60 70 (%) 50 Ambient temperature(˚C) Ambient humidity(%) 8 0.8 7 0.7 230V 6 0.6 5 0.5 4 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 46 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 : MU-A07WV - E1 CAPACITY : 2.3(kW) SHF : 0.74 INPUT : 710(W) OUTDOOR DB(:) 21 25 27 30 INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 2.70 1.51 0.56 568 2.59 1.45 0.56 596 2.48 1.39 0.56 625 2.39 1.34 0.56 653 21 20 2.82 1.24 0.44 596 2.70 1.19 0.44 632 2.62 1.15 0.44 646 2.53 1.11 0.44 675 22 18 2.70 1.62 0.60 568 2.59 1.55 0.60 596 2.48 1.49 0.60 625 2.39 1.44 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 47 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 : MU-A07WV - E1 CAPACITY : 2.3(kW) SHF : 0.74 INPUT : 710(W) INDOOR INDOOR DB(:) WB(:) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE 18 20 18 20 22 18 20 22 18 20 22 24 18 20 22 24 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 Q 2.25 2.37 2.
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OB307C-2.qxp 04.5.11 1:17 PM Page 48 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 : MU-A09WV - E1 CAPACITY : 2.55(kW) SHF : 0.70 INPUT : 780(W) OUTDOOR DB(:) 21 25 27 30 INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 3.00 1.56 0.52 624 2.87 1.49 0.52 655 2.75 1.43 0.52 686 2.65 1.38 0.52 718 21 20 3.12 1.25 0.40 655 3.00 1.20 0.40 694 2.91 1.16 0.40 710 2.81 1.12 0.40 741 22 18 3.00 1.68 0.56 624 2.87 1.61 0.56 655 2.75 1.54 0.56 686 2.65 1.49 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 49 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 : MU-A09WV - E1 CAPACITY : 2.55(kW) SHF : 0.70 INPUT : 780(W) INDOOR INDOOR DB(:) WB(:) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE 18 20 18 20 22 18 20 22 18 20 22 24 18 20 22 24 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 Q 2.50 2.63 2.
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OB307C-2.qxp 04.5.11 1:17 PM Page 50 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 : MU-A12WV - E1 CAPACITY : 3.45(kW) SHF : 0.67 INPUT : 1140(W) 21 Q SHC SHF INPUT 18 4.05 1.99 0.49 912 20 4.23 1.56 0.37 958 18 4.05 2.15 0.53 912 20 4.23 1.73 0.41 958 22 4.40 1.28 0.29 992 18 4.05 2.31 0.57 912 20 4.23 1.90 0.45 958 22 4.40 1.45 0.33 992 18 4.05 2.47 0.61 912 20 4.23 2.07 0.49 958 22 4.40 1.63 0.37 992 24 4.62 1.16 0.25 1037 18 4.05 2.63 0.65 912 20 4.23 2.24 0.53 958 22 4.40 1.80 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 51 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 : MU-A12WV - E1 CAPACITY : 3.45(kW) SHF : 0.67 INPUT : 1140(W) INDOOR INDOOR DB(:) WB(:) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE Q 35 SHC SHF INPUT 18 3.38 1.66 0.49 20 3.55 1.31 0.37 18 3.38 1.79 0.53 20 3.55 1.46 0.41 22 3.76 1.09 0.29 18 3.38 1.93 0.57 20 3.55 1.60 0.45 22 3.76 1.24 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 52 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 : MUH-A07WV - E1 CAPACITY : 2.3(kW) SHF : 0.74 INPUT : 710(W) OUTDOOR DB(:) 21 25 27 30 INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 2.70 1.51 0.56 568 2.59 1.45 0.56 596 2.48 1.39 0.56 625 2.39 1.34 0.56 653 21 20 2.82 1.24 0.44 596 2.70 1.19 0.44 632 2.62 1.15 0.44 646 2.53 1.11 0.44 675 22 18 2.70 1.62 0.60 568 2.59 1.55 0.60 596 2.48 1.49 0.60 625 2.39 1.44 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 53 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 : MUH-A07WV - E1 CAPACITY : 2.3(kW) SHF : 0.74 INPUT : 710(W) OUTDOOR DB(:) 35 40 Q SHC SHF INPUT Q SHC SHF INPUT Q 18 2.25 1.26 0.56 696 2.07 1.16 0.56 738 1.99 20 2.37 1.04 0.44 724 2.21 0.97 0.44 760 2.13 18 2.25 1.35 0.60 696 2.07 1.24 0.60 738 1.99 20 2.37 1.14 0.48 724 2.21 1.06 0.48 760 2.13 22 2.51 0.90 0.36 753 2.35 0.84 0.36 795 2.27 18 2.25 1.44 0.64 696 2.07 1.32 0.64 738 1.99 20 2.37 1.23 0.52 724 2.
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OB307C-2.qxp 04.5.11 1:17 PM Page 54 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 : MUH-A09WV - E1 CAPACITY : 2.55(kW) SHF : 0.70 INPUT : 780(W) OUTDOOR DB(:) 21 25 27 30 INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 3.00 1.56 0.52 624 2.87 1.49 0.52 655 2.75 1.43 0.52 686 2.65 1.38 0.52 718 21 20 3.12 1.25 0.40 655 3.00 1.20 0.40 694 2.91 1.16 0.40 710 2.81 1.12 0.40 741 22 18 3.00 1.68 0.56 624 2.87 1.61 0.56 655 2.75 1.54 0.56 686 2.65 1.
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OB307C-2.qxp 04.5.11 1:17 PM Page 55 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 : MUH-A09WV - E1 CAPACITY : 2.55(kW) SHF : 0.70 INPUT : 780(W) OUTDOOR DB(:) 35 40 INDOOR INDOOR DB(:) WB(:) Q SHC SHF INPUT Q SHC SHF INPUT Q 21 18 2.50 1.30 0.52 764 2.30 1.19 0.52 811 2.21 21 20 2.63 1.05 0.40 796 2.45 0.98 0.40 835 2.36 22 18 2.50 1.40 0.56 764 2.30 1.29 0.56 811 2.21 22 20 2.63 1.16 0.44 796 2.45 1.08 0.44 835 2.36 22 22 2.78 0.89 0.32 827 2.60 0.83 0.32 874 2.51 23 18 2.50 1.50 0.60 764 2.
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OB307C-2.qxp 04.5.11 1:17 PM Page 56 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 : MUH-A12WV - E1 CAPACITY : 3.40(kW) SHF : 0.67 INPUT : 1060(W) INDOOR INDOOR DB(:) WB(:) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE Q 21 SHC SHF INPUT 18 4.00 1.96 0.49 20 4.17 1.54 0.37 18 4.00 2.12 0.53 20 4.17 1.71 0.41 22 4.34 1.26 0.29 18 4.00 2.28 0.57 20 4.17 1.87 0.45 22 4.34 1.43 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 57 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 : MUH-A12WV - E1 CAPACITY : 3.40(kW) SHF : 0.67 INPUT : 1060(W) 35 INDOOR INDOOR DB(:) WB(:) Q SHC SHF 21 18 3.33 1.63 0.49 21 20 3.50 1.30 0.37 22 18 3.33 1.77 0.53 22 20 3.50 1.44 0.41 22 22 3.71 1.07 0.29 23 18 3.33 1.90 0.57 23 20 3.50 1.58 0.45 23 22 3.71 1.22 0.33 24 18 3.33 2.03 0.61 24 20 3.50 1.72 0.49 24 22 3.71 1.37 0.37 24 24 3.91 0.98 0.25 25 18 3.33 2.17 0.65 25 20 3.50 1.86 0.53 25 22 3.71 1.52 0.
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OB307C-2.qxp 04.5.11 1:17 PM Page 58 PERFORMANCE DATA HEAT operation (230V) MSC-A07WV - E1 : MUH-A07WV - E1 CAPACITY : 2.5 kW INPUT : 690 W INDOOR DB(:) 15 21 26 OUTDOOR WB(:) -10 -5 0 5 10 15 20 Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 1.58 449 1.90 538 2.23 607 2.55 656 2.88 697 3.18 718 3.50 731 1.50 483 1.80 573 2.13 635 2.43 683 2.75 718 3.05 738 3.36 766 1.35 518 1.68 607 1.98 669 2.30 718 2.63 752 2.93 773 3.25 794 MSC-A09WV - E1 : MUH-A09WV - E1 CAPACITY : 3.
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OB307C-2.qxp 04.5.11 1:17 PM Page 59 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 MSC-A07YV - E1 (Single) : MUX-A10WV - E1 CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 760(W) 21 Q SHC SHF INPUT 21 18 2.82 1.58 0.56 608 21 20 2.94 1.29 0.44 638 22 18 2.82 1.69 0.60 608 22 20 2.94 1.41 0.48 638 22 22 3.06 1.10 0.36 661 23 18 2.82 1.80 0.64 608 23 20 2.94 1.53 0.52 638 23 22 3.06 1.22 0.40 661 24 18 2.82 1.92 0.68 608 24 20 2.94 1.65 0.56 638 24 22 3.06 1.35 0.44 661 24 24 3.22 1.03 0.32 692 25 18 2.
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OB307C-2.qxp 04.5.11 1:17 PM Page 60 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 MSC-A07YV - E1 (Single) : MUX-A10WV - E1 CAPACITY : 2.4(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 61 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 MSC-A07YV - E1 (Single : Room B) : MUX-A19WV - E1 CAPACITY : 2.4(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 62 PERFORMANCE DATA COOL operation (230V) MSC-A07WV - E1 MSC-A07YV - E1 (Single : Room B) : MUX-A19WV - E1 CAPACITY : 2.4(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 63 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 MSC-A12YV - E1 (Single : Room A) : MUX-A19WV - E1 CAPACITY : 3.5(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 64 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 MSC-A12YV - E1 (Single : Room A) : MUX-A19WV - E1 CAPACITY : 3.5(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 65 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 MSC-A09YV - E1 (Single : Room A) : MUX-A20WV - E1 CAPACITY : 2.6(kW) SHF : 0.75 INPUT : 850(W) OUTDOOR DB(:) 21 25 27 Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q 18 3.06 1.74 0.57 680 2.93 1.67 0.57 714 2.81 1.60 0.57 748 2.70 20 3.19 1.43 0.45 714 3.06 1.37 0.45 757 2.96 1.33 0.45 774 2.86 18 3.06 1.86 0.61 680 2.93 1.78 0.61 714 2.81 1.71 0.61 748 2.70 20 3.19 1.56 0.49 714 3.06 1.50 0.49 757 2.96 1.
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OB307C-3.qxp 04.5.11 1:18 PM Page 66 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 MSC-A09YV - E1 (Single : Room A) : MUX-A20WV - E1 CAPACITY : 2.6(kW) SHF : 0.75 INPUT : 850(W) 35 Q SHC SHF INPUT 18 2.55 1.45 0.57 833 20 2.68 1.21 0.45 867 18 2.55 1.55 0.61 833 20 2.68 1.31 0.49 867 22 2.83 1.05 0.37 901 18 2.55 1.66 0.65 833 20 2.68 1.42 0.53 867 22 2.83 1.16 0.41 901 18 2.55 1.76 0.69 833 20 2.68 1.53 0.57 867 22 2.83 1.28 0.45 901 24 2.99 0.99 0.33 935 18 2.55 1.86 0.73 833 20 2.68 1.63 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 67 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 MSC-A09YV - E1 (Single : Room B) : MUX-A20WV - E1 CAPACITY : 2.9(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 68 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 MSC-A09YV - E1 (Single : Room B) : MUX-A20WV - E1 CAPACITY : 2.9(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 69 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 MSC-A12YV - E1 (Single) : MUX-A25WV - E1 CAPACITY : 3.5(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 70 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 MSC-A12YV - E1 (Single) : MUX-A25WV - E1 CAPACITY : 3.5(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 71 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 MSC-A09YV - E1 (Single : Room C ) : MUX-A26WV - E1 CAPACITY : 2.75(kW) SHF :0.73 INPUT : 1050(W) 21 Q SHC SHF INPUT 18 3.23 1.76 0.55 840 20 3.37 1.43 0.43 882 18 3.23 1.89 0.59 840 20 3.37 1.57 0.47 882 22 3.51 1.21 0.35 914 18 3.23 2.02 0.63 840 20 3.37 1.70 0.51 882 22 3.51 1.35 0.39 914 18 3.23 2.15 0.67 840 20 3.37 1.84 0.55 882 22 3.51 1.49 0.43 914 24 3.69 1.12 0.31 956 18 3.23 2.28 0.71 840 20 3.37 1.
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OB307C-3.qxp 04.5.11 1:18 PM Page 72 PERFORMANCE DATA COOL operation (230V) MSC-A09WV - E1 MSC-A09YV - E1 (Single : Room C ) : MUX-A26WV - E1 CAPACITY : 2.75(kW) SHF : 0.73 INPUT : 1050(W) 35 Q SHC SHF 18 2.70 1.47 0.55 20 2.83 1.20 0.43 18 2.70 1.58 0.59 20 2.83 1.32 0.47 22 3.00 1.03 0.35 18 2.70 1.68 0.63 20 2.83 1.43 0.51 22 3.00 1.15 0.39 18 2.70 1.79 0.67 20 2.83 1.54 0.55 22 3.00 1.27 0.43 24 3.16 0.96 0.31 18 2.70 1.90 0.71 20 2.83 1.66 0.59 22 3.00 1.39 0.47 24 3.16 1.09 0.35 18 2.70 2.01 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 73 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 MSC-A12YV - E1 (Single : Room A) : MUX-A26WV - E1 CAPACITY : 3.4(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM Page 74 PERFORMANCE DATA COOL operation (230V) MSC-A12WV - E1 MSC-A12YV - E1 (Single : Room A) : MUX-A26WV - E1 CAPACITY : 3.4(kW) SHF : 0.
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OB307C-3.qxp 04.5.11 1:18 PM 10 Page 75 MICROPROCESSOR CONTROL MSC-A07WV - E1 MSC-A09WV - E1 MSC-A12WV - E1 MU-A07WV - E1 MU-A09WV - E1 MU-A12WV - E1 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 MUX-A10WV - E1 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP (ON/OFF) button ON. Indoor unit receives the signal with a beep tone.
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OB307C-3.qxp 04.5.11 1:18 PM Page 76 3. Coil frost prevention ① Temperature control When the indoor coil thermistor RT12 reads 4°C or below(MSC-A07/A09WV) / 0°C or below(MSC-A12WV) for 5 minutes, the coil frost prevention mode starts. The indoor fan operates at the set speed and the compressor stops for 5 minutes. After that, if RT12 still reads below 4°C (MSC-A07/A09WV) / 0°C (MSC-A12WV), this mode is prolonged until the RT12 reads over 4°C (MSC-A07/A09WV) / 0°C (MSC-A12WV).
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OB307C-3.qxp 04.5.11 1:18 PM Page 77 Operation time chart Example ON ON OFF OFF Thermostat ON ON Indoor fan OFF Outdoor fan Compressor OFF OFF ON ON ON OFF OFF ON 8 min. OFF 3 min. 4 min. 1 min. 4. Coil frost prevention The operation is as same as coil frost prevention during COOL operation.(Refer to 10-1.3.) However when coil frost prevention works while the indoor fan is OFF, its speed becomes set speed. 10-3.
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OB307C-3.qxp 04.5.11 1:18 PM Page 78 (3) Warm air control. When the following any condition of 1 (a. ~ c.) and the condition of 2 are satisfied at the same time, warm air control works. 1 a.) When outdoor unit starts operating in HEAT mode. b.) When cold air prevention has been released. c.) When defrosting has been finished 2 When the temperature of indoor coil thermistor RT12 is less than 37°C. When warm air control works, the fan speed changes as follows to blow out warm air gradually.
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OB307C-3.qxp 04.5.11 1:18 PM Page 79 4. Defrosting Defrosting of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT61. (1) Starting conditions of defrost When all conditions of a) ~ c) are satisfied, the defrosting operation starts. a) The compressor cumulative operation time exceeds 40 minutes without the defrosting operation working. b) RT61 reads - 3°C or less.
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OB307C-3.qxp 04.5.11 1:18 PM Page 80 5. R.V. coil control Heating · · · · · ON Cooling · · · · · OFF Dry · · · · · · · · OFF When operation starts, the 4-way valve reverses for 5 seconds right before start-up of the compressor. Operation time chart (COOL/DRY) (HEAT) 5 sec. 5 sec. ON OFF R.V. coil ON OFF ON OFF Outdoor fan ON OFF ON OFF Compressor 10-5. “I FEEL CONTROL” ( ON OFF ) OPERATION (1) Press OPERATE/STOP(ON/OFF) button.
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OB307C-3.qxp 04.5.11 1:18 PM Page 81 (4) The initial set temperature is decided by the initial room temperature.
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OB307C-3.qxp 04.5.11 1:18 PM Page 82 10-6. FAN MOTOR CONTROL (1) Rotational frequency feedback control The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feedback the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (High,Med.,Low), the microprocessor controls SR141 and adjusts fan motor electric current to make the current rotational frequency close to the target rotational frequency.
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OB307C-3.qxp 04.5.11 1:18 PM Page 83 (7) Cold air prevention in HEAT operation When any of the following conditions occurs in HEAT operation, the horizontal vane angle changes to Angle 1 automatically to prevent cold air blowing on users. ① Compressor is not operating. ➁ Defrosting is performed. ➂ Indoor coil thermistor RT12 reads 24: or below. ➃ Indoor coil thermistor RT12 temperature is raising from 24°C or below, but it does not exceed 28:.
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OB307C-3.qxp 04.5.11 1:18 PM Page 84 (4) Press HR. and MIN. button to set the timer. Time setting is 10-minute units. HR. and MIN. button will work when “ ” or “ ” mark is flashing. These marks disappear in 1 minute. After setting the ON timer, check that OPERATION INDICATOR lamp of the indoor unit lights.
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OB307C-3.qxp 04.5.11 1:18 PM Page 85 10-10.
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OB307C-3.qxp 11 04.5.11 1:18 PM Page 86 SERVICE FUNCTIONS MSC-A07WV - E1 MSC-A09WV - E1 MSC-A12WV - E1 MU-A07WV - E1 MU-A09WV - E1 MU-A12WV - E1 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 MUX-A10WV - E1 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 11-1. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JPDS and JPSG on the outdoor deicer P.C. board, defrosting mode can be accomplished regardless of the defrost interval restriction.
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OB307C-3.qxp 04.5.11 1:18 PM Page 87 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit. The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
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OB307C-3.qxp 04.5.11 1:18 PM Page 88 NOTE •The operation settings are memorized when 10 seconds have passed after the remote controller was operated. •If main power is cut while AUTO START/STOP timer is active, the timer setting is cancelled. •If the unit has been off with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is off.
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OB307C-3.qxp 04.5.11 1:18 PM Page 89 INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT : MXZ-A18WV- E1 MXZ-A26WV- E1 MXZ-A32WV- E1 Multi system air conditioner can connect two or more indoor units with one outdoor unit. •Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not connect indoor units beyond the outdoor unit capacity.
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OB307C-3.qxp 04.5.11 1:18 PM Page 90 12-2. Instruction of troubleshooting MSC-A07WV - E1 MSC-A09WV - E1 MSC-A12WV - E1 MU-A07WV - E1 MU-A09WV - E1 MU-A12WV - E1 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 MUX-A10WV - E1 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 Start Indoor unit operates. Outdoor unit doesn't operate normally. Indoor unit operates. Outdoor unit doesn't operate. Indoor unit doesn't receive the signal from remote controller.
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OB307C-4.qxp 04.5.11 1:19 PM Page 91 12-3. Troubleshooting check table • The following indication applies regardless of shape of the indicator. Operation Indicator Lighted Not lighted · Flashing of the OPERATION INDICATOR lamp (left-hand side) indicates possible abnormalities. · The OPERATION INDICATOR lamp (left-hand side lamp) is lighting during normal operation. ❈ Before taking measures, make sure that the symptom reappears, for accurate troubleshooting. Self check table No.
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OB307C-4.qxp 04.5.11 1:19 PM Page 92 12-4. Trouble criterion of main parts MSC-A07WV - E1 MSC-A09WV - E1 MSC-A12WV - E1 Check method and criterion Part name Room temperature thermistor (RT11) Measure the resistance with a tester.
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OB307C-4.qxp 04.5.11 1:19 PM MU-A07WV - E1 MU-A09WV - E1 MU-A12WV - E1 Page 93 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 Check method and criterion Part name Defrost thermistor (RT63) Measure the resistance with a tester. (Part temperature –10°C ~ 40°C) Normal MUH-A07/A09/A12WV Compressor (MC) INNER PROTECTOR MU-A07/A09WV MUH-A07/A09WV 150i 5°C OPEN 90i10°C CLOSE Abnormal Open or short-circuit 5kΩ ~ 60kΩ Measure the resistance between the terminals with a tester.
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OB307C-4.qxp 04.5.11 1:19 PM Page 94 MUX-A10WV - E1 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 Part name Figure Check method and criterion Measure the resistance between the terminals with a tester. (Coil wiring temperature-10°C ~ 40°C) Normal Compressor (MC, MC1, MC2) INNER PROTECTOR 150°C OPEN 90°C CLOSE RN092VHSHT RN145VHSHT RN092VHSHT RN099VHSHT RN125VHSHT Open or C-R 3.41 ~ 4.18Ω 2.14 ~ 2.63Ω 3.41 ~ 4.18Ω 2.99 ~ 3.67Ω 2.52 ~ 3.09Ω C-S 5.41 ~ 6.63Ω 3.35 ~ 4.11Ω 5.41 ~ 6.63Ω 4.
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OB307C-4.qxp 04.5.11 1:19 PM Page 95 When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor doesn’t operate. A Check of indoor fan motor Turn OFF the power supply. Check connector CN211 visually. No Reconnect the lead wires. Yes Is soldered point of the connector correctly soldered? Are lead wires connected? No Resolder it. Yes Disconnect lead wires from connector CN211 on indoor electronic control P.C. board. Measure resistance between lead wires No.1 and No.5 and then No.3 and No.5.
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OB307C-4.qxp 04.5.11 1:19 PM Page 96 The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually. Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply.
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OB307C-4.qxp 04.5.11 1:19 PM Page 97 Compressor and/or outdoor fan doesn’t operate. D Check of outdoor unit Start Is there 230V AC between L - N on the TB1 of outdoor unit? Yes Press the EMERGENCY OPEERATION switch of all indoor units. No 3 minutes later, is there 12V DC between 1 - 2 on the all terminal blocks of outdoor unit? No Check the power supply and connecting wire. Is there 12V DC between 1 - 2 on the terminal block of each indoor unit? No Check the indoor unit.
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OB307C-4.qxp 04.5.11 1:19 PM Page 98 Compressor and/or outdoor fan motor doesn’t stop. E Check of outdoor unit Start Turn OFF the power supply. After 1 minute, turn ON power supply again. Does compressor or outdoor fan motor stop? No Yes Is there 12V DC between 1–2 on the outdoor terminal block (TB2)? Yes No Is there 230V AC between COM on the Yes compressor contactor (52C) and N on the outdoor terminal block (TB1)? No Replace the indoor electoronic control P.C. board.
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OB307C-4.qxp 04.5.11 1:19 PM Page 99 Unit operates COOL mode even if it is set to HEAT mode. w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit. F Check of R.V. coil Turn ON the power supply and operate the indoor unit in HEAT mode by pressing the EMERGENCY OPERATION switch. After 3 minutes, does the unit operate in COOL mode? No OK Yes Is there 230V AC between CN7211 – 2 on the deicer P.C. board? No Replace the deicer P.C.
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OB307C-4.qxp 04.5.11 1:19 PM Page 100 When OPERATION INDICATOR lamp flashes 0.5-second intervals or 1-time. Outdoor unit does not operate. G How to check mis-wiring and serial signal error w1 Set the switch(SW2-2) on indoor electronic control P.C. board to MU or MUX type, when the outdoor unit is MU or MUX type. If the setting is MUH or MXZ type, the unit does not work. Start w2 Short circuit of JPG and JPS on the indoor electronic control P.C.
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OB307C-4.qxp 04.5.11 1:19 PM Page 101 When OPERATION INDICATOR lamp flashes 6-time. Thermistors in the outdoor unit are abnormal. H Check of outdoor thermistor Start Replace the deicer P.C. board. Defrost thermistor (RT61) Measure resistance between CN 661 1 and 2. Turn OFF the power supply. Is the resistance of thermistor normal? Yes No Reconnect CN661. Turn ON the power supply and press the EMERGENCY OPERATION switch.
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OB307C-4.qxp 04.5.11 1:19 PM Page 102 TEST POINT DIAGRAM AND VOLTAGE MSC-A07WV - E1 MSC-A09WV - E1 MSC-A12WV - E1 Indoor electronic control P.C. board Fuse 250V AC 3.15A } Varistor (NR11) 12V DC Indoor fan motor 230 V AC { +-- } Power supply input 230 V AC R132 Indoor coil thermistor (RT12) Room temperature thermistor (RT11) } Timer short mode point JPG, JPS (Refer to page 86.) Emergency operation switch SW2 (Refer to page 87.) 1 sets the Auto restart function ON/ OFF.
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OB307C-4.qxp 04.5.11 1:19 PM Page 103 Power supply input 230V AC } } CN711 CN721 Outdoor fan motor R.V. coil 230V AC 230V AC } MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 Outdoor deicer P.C. board NR61 Varistor F61 Fuse 2A/250V + -- } R601 5~10VDC Defrost interval time short pin (JPDS, JPSG) (Refer to page 86.) } CN661 1-2 Defrost thermistor RT61 5V DC J205 + J101 -12V DC J204 + J101 -- 103 } Jumper wire for change in defrost setting (JRF, JRG) (Refer to page 86.
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OB307C-4.qxp 04.5.11 1:19 PM Page 104 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 Outdoor control P.C.
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OB307C-4.qxp 04.5.11 1:19 PM 13 Page 105 DISASSEMBLY INSTRUCTIONS <"Terminal with lock mechanism" Detaching points> In case of terminal with lock mechanism, detach the terminal as shown below. There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism. The terminal with no lock mechanism can be removed by pulling it out. Check the shape of the terminal and work. (1) Slide the sleeve and check if there is a locking lever or not.
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OB307C-4.qxp 04.5.11 1:19 PM Page 106 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (1) (2) (3) (4) (5) (6) (7) Remove the front panel. (Refer to 1.) Remove the electrical cover. (Refer to 2.) Remove the V.A. clamp. (Refer to 2.) Remove the cord clamp. (Refer to 2.) Remove the terminal block. (Refer to 2.) Remove the screw of ground wire. (Refer to 2.
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OB307C-4.qxp 04.5.11 1:19 PM Page 107 13-2. MU-A07WV - E1 MU-A09WV OUTDOOR UNIT MU-A12WV - E1 E1 OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) (2) (3) (4) (5) Remove the Remove the Remove the Remove the Remove the the insides. (6) Remove the (7) Remove the screws of the top panel. screw of the service panel. screws of the cabinet. screws of the front panel and motor support. service panel, and remove the screw from Photo 1 Screws of the front panel and motor support top panel. cabinet.
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OB307C-4.qxp 04.5.11 1:19 PM Page 108 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor (1) Remove the cabinet. (Refer to 1.) (2) Remove the propeller nut. (3) Remove the propeller. NOTE : Loose the propeller in the rotating direction for removal. When attaching the propeller, align the mark on the propeller and the motor shaft cut section. Set the propeller in position by using the cut on the shaft and the mark on the propeller.
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OB307C-4.qxp 04.5.11 1:19 PM Page 109 13-3. MUH-A07WV - E1 MUH-A09WV OUTDOOR UNIT E1 MUH-A12WV - OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) (2) (3) (4) (5) Remove the Remove the Remove the Remove the Remove the the insides. (6) Remove the (7) Remove the E1 Photo 1 Screws of the front panel and motor support screws of the top panel. screw of the service panel. screws of the cabinet. screws of the front panel and motor support. service panel, and remove the screw from top panel.
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OB307C-4.qxp 04.5.11 1:19 PM Page 110 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor (1) Remove the cabinet. (Refer to 1.) (2) Remove the propeller nut. (3) Remove the propeller. NOTE : Loose the propeller in the rotating direction for removal. When attaching the propeller, align the mark on the propeller and the motor shaft cut section. Set the propeller in position by using the cut on the shaft and the mark on the propeller.
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OB307C-4.qxp 04.5.11 1:19 PM Page 111 13-4. MUX-A10WV - E1 OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) (2) (3) (4) (5) Remove the Remove the Remove the Remove the Remove the the insides. (6) Remove the (7) Remove the screws of the top panel. screw of the service panel. screws of the cabinet. screws of the front panel and motor support. service panel, and remove the screw from Set screws of the front panel and motor support top panel. cabinet.
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OB307C-4.qxp 04.5.11 1:19 PM Page 112 OPERATING PROCEDURE PHOTOS 3. Removing the propeller and the outdoor fan motor Photo 5 (1) Remove the cabinet. (Refer to 1.) (2) Remove the propeller nut. (3) Remove the propeller. Screws of the NOTE : Loose the propeller in the rotating direction for solenoid coil removal. (21R) When attaching the propeller, align the mark on the propeller and the motor shaft cut section. Set the propeller in position by using the cut on the shaft and the mark on the propeller.
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OB307C-4.qxp 04.5.11 1:19 PM Page 113 13-5. MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 OUTDOOR UNIT NOTE : These photos are MUX-A20WV. Other models are almost the same as MUX-A20WV. OPERATING PROCEDURE PHOTOS 1.Removing the cabinet (1) (2) (3) (4) (5) (6) (7) (8) Remove Remove Remove Remove Remove Remove Remove Remove the the the the the the the the Photo 1 screws of the service panel. screws of the top panel. service panel. top panel. screws of the front panel. front panel.
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OB307C-4.qxp 04.5.11 1:19 PM Page 114 OPERATING PROCEDURE PHOTOS 2. Removing the relay panel Photo 4 (1) Remove the cabinet. (Refer to 1.) (2) Disconnect the following connectors. . Outdoor fan motor . Only MUX-20WV Solenoid coil (21RB, 21R3, 21R4) .
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OB307C-4.qxp 04.5.11 1:19 PM Page 115 OPERATING PROCEDURE PHOTOS 5. Removing the compressor (A, B) Photo 5 (1) Remove the cabinet. (Refer to 1.) (2) Remove the relay panel. (3) Remove the soundproof felt. (4) Remove the terminal cover on the compressor. (5) Disconnect lead wires from the compressor. (6) Recover gas from the refrigerant circuit. (7) Disconnect the welded part of the discharge pipe. (8) Disconnect the welded part of the suction pipe. (9) Remove nuts fixing the compressor.
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OB307C-4.qxp 14 04.5.11 1:19 PM Page 116 PARTS LIST MSC-A07WV - E1 (WH) MSC-A09WV - E1 (WH) MSC-A12WV - E1 (WH) 14-2. ACCESSORY AND REMOTE CONTROLLER 14-1. INDOOR UNIT STRUCTURAL PARTS 1 (W) 11 10(W) 12 9 2 8 (See page 127.) 3 7 (See page 127.) 4 5 6 (W) (W) These figures show about MSC-A12WV. 14-1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol No. Part No.
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OB307C-4.qxp 04.5.11 1:19 PM Page 117 MSC-A07WV - E1 (WH) MSC-A09WV - E1 (WH) MSC-A12WV - E1 (WH) 14-4. INDOOR UNIT HEAT EXCHANGER 14-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 19 SLEEVE BEARING 18 21 (W) 16 17 15 2 1 ROOM TEMPERATURE THERMISTOR 3 13 12 22 14 4 11 23 5 FUSE 6 VARISTOR 7 (W)These figures show about MSC-A12WV. 8 9 10 14-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. No.
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OB307C-4.qxp 04.5.11 1:19 PM Page 118 MU-A07WV - E1 MU-A09WV - E1 MU-A12WV - E1 14-5. OUTDOOR UNIT STRUCTURAL PARTS 12 11 10 9 1 2 3 5 4 6 8 7 Part number that is circled is not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Part No.
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OB307C-4.qxp 04.5.11 1:20 PM MU-A07WV - E1 Page 119 MU-A09WV - E1 MU-A12WV - E1 14-6. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 5 6 1 3 2 4 Part numbers that are circled are not shown in the illustration. No. 1 2 3 4 5 6 7 8 Part No.
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OB307C-4.qxp 04.5.11 1:20 PM Page 120 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 14-7. OUTDOOR UNIT STRUCTURAL PARTS 1 13 12 11 2 3 10 4 5 6 Part numbers that are circled are not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Part No.
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OB307C-5.qxp 04.5.11 1:21 PM Page 121 MUH-A07WV - E1 MUH-A09WV - E1 MUH-A12WV - E1 14-9. ACCESSORY 14-8. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 7 8 2 1 3 13 12 6 5 4 14-8. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 Part name Part No.
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OB307C-5.qxp 04.5.11 1:21 PM Page 122 MUX-A10WV - E1 14-10. OUTDOOR UNIT STRUCTURAL PARTS 12 11 9 10 1 2 3 13 14 15 4 5 6 7 8 Part numbers that are circled are not shown in the illustration. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Part No.
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OB307C-5.qxp 04.5.11 1:21 PM Page 123 MUX-A10WV - E1 14-11. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 11 9 8 10 B A 2 1 No. 1 2 3 4 5 6 7 8 9 10 11 Part No.
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OB307C-5.qxp 04.5.11 1:21 PM Page 124 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 14-12. OUTDOOR UNIT STRUCTURAL PARTS MUX-A26WV - E1 17 18 1 2 6 3 4 15 5 14 13 6 7 8 9 10 11 12 16 These figures show MUX-A20WV.
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OB307C-5.qxp 04.5.11 1:21 PM Page 125 14-12. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Symbol No. Part No.
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OB307C-5.qxp 04.5.11 1:21 PM Page 126 MUX-A19WV - E1 MUX-A20WV - E1 MUX-A25WV - E1 MUX-A26WV - E1 14-13. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 9 10 1 8 7 6 2 B 5 A 3 4 Part numbers that are circled are not shown in the illustration. Symbol No. Part No. Part Name in Wiring Diagram E02 1 E02 2 E02 E02 E02 3 E02 E02 4 756 726 214 756 757 758 759 301 301 501 444 444 444 444 OUTDOOR FAN MOTOR OUTDOOR FAN MOTOR PROPELLER OUTDOOR CONTROL P.C. BOARD OUTDOOR CONTROL P.C.
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OB307C-5.qxp 04.5.11 1:21 PM Page 127 14-14. AIR CLEANING FILTER ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 4 months. However, when it becomes dirty, replace it as soon as possible. ● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. ● DO NOT reuse AIR CLEANING FILTER even if it is washed. ● DO NOT remove or attach AIR CLEANING FILTER during unit operation.
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OB307C-5.qxp 04.5.11 1:21 PM Page 128 HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C Copyright 2002 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2004. No.OB307 REVISED EDITION-C 6 Distributed in Jan. 2004. No.OB307 REVISED EDITION-B 6 Distributed in Feb. 2003. No.OB307 REVISED EDITION-A 17 Distributed in Dec. 2002. No.OB307 17 Made in Japan New publication, effective May 2004 Specifications subject to change without notice.