Service manual

ManualsBrandsMitsubishi ManualsDomestic AppliancesMr.Slim PKH-FAK

This manual does not cover the

following outdoor units. When ser-

vicing them, please refer to the

service manual No.OC150 and

this manual in a set.

[Service Ref.]

PUH-1.6VKA

3.UK

PUH-2VKA2.UK

PUH-2.5VKA2.UK

PUH-3VKA

2.UK

PUH-3YKA2.UK

PUH-4YKSA2.UK

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

CONTENTS

1. PART NAMES AND FUNCTIONS ········2

2. SPECIFICATIONS·································4

3. DATA·····················································9

4. OUTLINES AND DIMENSIONS··········23

5. WIRING DIAGRAM·····························27

REFRIGERANT SYSTEM DIAGRAM

······29

7. OPERATION FLOW-CHART··············30

8. MICROPROCESSOR CONTROL·······34

9. TROUBLESHOOTING························56

10. SYSTEM CONTROL···························65

11. DISASSEMBLY PROCEDURE ···········70

12. PARTS LIST········································73

13. OPTIONAL PARTS ·····························79

1999

Indoor unit

[Model names] [Service Ref.]

PKH-1.6FKA PKH-1.6FKA-E

PKH-2FKA PKH-2FKA-E

PKH-2.5FKA PKH-2.5FKA-E

PKH-3FKA PKH-3FKA-E

PKH-4FKSA PKH-4FKSA-E

INDOOR UNIT

Wall MountedSeries PKH

FILTER

CHECK MODE

TEST RUN

REMOTE CONTROLLER

No.OC190

The Slim Line.

From Mitsubishi Electric.

Summary of content (84 pages)

PAGE 1
999 SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS No.OC190 TECHNICAL & SERVICE MANUAL Series PKH Wall Mounted Indoor unit [Model names] This manual does not cover the following outdoor units. When servicing them, please refer to the service manual No.OC150 and this manual in a set. [Service Ref.] PKH-1.6FKA-E PKH-2FKA-E PKH-2.5FKA-E PKH-3FKA-E PKH-4FKSA-E PKH-1.6FKA PKH-2FKA PKH-2.5FKA PKH-3FKA PKH-4FKSA [Service Ref.] PUH-1.6VKA3.UK PUH-2VKA2.UK PUH-2.5VKA2.UK PUH-3VKA2.UK PUH-3YKA2.UK PUH-4YKSA2.
PAGE 2
1 PART NAMES AND FUNCTIONS ● Indoor Unit Air intake Filter room air is suctioned in here. Air intake grill (Removes dust and dirt from the intake air.) Guide vane Swing louvers Air flow can be changed to horizontally by moving the Guide vane to the left or right. Disperses airflow up and down as well as adjusts the angle of air flow direction.
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● Display CENTRALLY CONTROLLED display r display This indicates when the unit is controlled by optional features such as central control type remote controller. The current time , start time and stop time can be displayed in ten second intervals by pressing the time switch button. The start time or stop time is always displayed during the timer operation. l display The selected fan speed is displayed.
PAGE 4
2 Item Function SPECIFICATIONS Service Ref. Capacity PKH-1.6FKA-E Cooling 4,500 15,350 1.51 W Btu/h kW Total input Service Ref. Power supply(phase,cycle,voltage) Input kW Running current A Starting current A External finish Heat exchanger Fan Fan(drive) ✕ No. Fan motor output kW Airflow(Low-High) m3/X External static pressure Pa(mmAq) Booster heater kW Operation control & Thermostat Noise level(Low-High) > Unit drain pipe O.D. A(in.) W A(in.) Dimensions D A(in.) H A(in.
PAGE 5
Item Function Service Ref. Capacity PKH-2FKA-E Cooling 5,500 18,800 2.27 W Btu/h kW Total input Service Ref. Power supply(phase,cycle,voltage) Input kW Running current A Starting current A External finish Heat exchanger Fan Fan(drive) ✕ No. Fan motor output kW Airflow(Low-High) m3/X External static pressure Pa(mmAq) Booster heater kW Operation control & Thermostat Noise level(Low-High) > Unit drain pipe O.D. A(in.) W A(in.) Dimensions D A(in.) H A(in.) Weight kg(lbs) Service Ref.
PAGE 6
Item Function Service Ref. Capacity PKH-2.5FKA-E Cooling 6,500 22,200 2.56 W Btu/h kW Total input Service Ref. Power supply(phase,cycle,voltage) Input kW Running current A Starting current A External finish Heat exchanger Fan Fan(drive) ✕ No. Fan motor output kW Airflow(Low-High) m3/X External static pressure Pa(mmAq) Booster heater kW Operation control & Thermostat Noise level(Low-High) > Unit drain pipe O.D. A(in.) W A(in.) Dimensions D A(in.) H A(in.) Weight kg(lbs) Service Ref.
PAGE 7
Item Function Service Ref. Capacity Cooling 7,900 27,000 3.25 W Btu/h kW REFRIGERANT PIPING OUTDOOR UNIT INDOOR UNIT Total input Service Ref. Power supply(phase,cycle,voltage) Input kW Running current A Starting current A External finish Heat exchanger Fan Fan(drive) ✕ No. Fan motor output kW Airflow(Low-High) m3/X External static pressure Pa(mmAq) Booster heater kW Operation control & Thermostat Noise level(Low-High) > Unit drain pipe O.D. A(in.) W A(in.) Dimensions D A(in.) H A(in.
PAGE 8
Item Function Service Ref. Capacity INDOOR UNIT OUTDOOR UNIT REFRIGERANT PIPING Cooling 9,500 32,400 3.31 W Btu/h kW Total input Service Ref. Power supply(phase,cycle,voltage) kW Input A Running current A Starting current External finish Heat exchanger Fan Fan(drive) ✕ No. kW Fan motor output m3/X Airflow(Low-High) Pa(mmAq) External static pressure kW Booster heater Operation control & Thermostat > Noise level(Low-High) A(in.) Unit drain pipe O.D. A(in.) W A(in.) Dimensions D A(in.
PAGE 9
3 DATA 1. PERFORMANCE DATA 1) COOLING CAPACITY<1> PKH-1.6FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 20 SHC(W) SHF P.C. Outdoor intake air °C DB 25 CA SHC(W) SHF P.C. CA 30 SHC(W) SHF P.C. 20 16 4540 3042 0.67 1.21 4415 2958 0.67 1.26 4253 2850 0.67 1.36 20 18 4834 2659 0.55 1.23 4706 2589 0.55 1.29 4535 2494 0.55 1.39 20 20 5131 2206 0.43 1.26 5010 2154 0.43 1.31 4831 2077 0.43 1.42 22 16 4540 3405 0.75 1.21 4415 3312 0.75 1.
PAGE 10
COOLING CAPACITY<2> PKH-1.6FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 35 SHC(W) SHF P.C. Outdoor intake air °C DB 40 CA SHC(W) SHF P.C. CA 45 SHC(W) SHF P.C. 20 16 4081 2734 0.67 1.46 3899 2612 0.67 1.55 3706 2483 0.67 1.65 20 18 4355 2395 0.55 1.49 4167 2292 0.55 1.59 3970 2183 0.55 1.70 20 20 4645 1997 0.43 1.53 4451 1914 0.43 1.64 4249 1827 0.43 1.75 22 16 4081 3061 0.75 1.46 3899 2924 0.75 1.55 3706 2780 0.75 1.
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COOLING CAPACITY<3> PKH-2FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 20 SHC(W) SHF P.C. Outdoor intake air °C DB 25 CA SHC(W) SHF P.C. CA 30 SHC(W) SHF P.C. 20 16 5549 3385 0.61 1.82 5397 3292 0.61 1.90 5198 3171 0.61 2.04 20 18 5908 2895 0.49 1.86 5752 2819 0.49 1.94 5543 2716 0.49 2.09 20 20 6271 2320 0.37 1.89 6124 2266 0.37 1.97 5905 2185 0.37 2.13 22 16 5549 3829 0.69 1.82 5397 3724 0.69 1.90 5198 3587 0.69 2.
PAGE 12
COOLING CAPACITY<4> PKH-2FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 35 SHC(W) SHF P.C. Outdoor intake air °C DB 40 CA SHC(W) SHF P.C. CA 45 SHC(W) SHF P.C. 20 16 4988 3043 0.61 2.19 4765 2907 0.61 2.34 4530 2763 0.61 2.49 20 18 5323 2608 0.49 2.24 5093 2495 0.49 2.40 4852 2378 0.49 2.55 20 20 5677 2101 0.37 2.30 5440 2013 0.37 2.46 5193 1921 0.37 2.63 22 16 4988 3442 0.69 2.19 4765 3288 0.69 2.34 4530 3125 0.69 2.
PAGE 13
COOLING CAPACITY<5> PKH-2.5FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 20 SHC(W) SHF P.C. Outdoor intake air °C DB 25 CA SHC(W) SHF P.C. CA 30 SHC(W) SHF P.C. 20 16 6557 4787 0.73 2.05 6378 4656 0.73 2.14 6144 4485 0.73 2.30 20 18 6982 4259 0.61 2.09 6798 4147 0.61 2.18 6551 3996 0.61 2.36 20 20 7411 3631 0.49 2.13 7237 3546 0.49 2.23 6979 3420 0.49 2.41 22 16 6557 5312 0.81 2.05 6378 5166 0.81 2.14 6144 4976 0.81 2.
PAGE 14
COOLING CAPACITY<6> PKH-2.5FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 35 SHC(W) SHF P.C. Outdoor intake air °C DB 40 CA SHC(W) SHF P.C. CA 45 SHC(W) SHF P.C. 20 16 5895 4303 0.73 2.47 5631 4111 0.73 2.64 5353 3908 0.73 2.80 20 18 6291 3837 0.61 2.53 6019 3671 0.61 2.70 5734 3498 0.61 2.88 20 20 6709 3288 0.49 2.59 6429 3150 0.49 2.78 6137 3007 0.49 2.96 22 16 5895 4775 0.81 2.47 5631 4561 0.81 2.64 5353 4336 0.81 2.
PAGE 15
COOLING CAPACITY<7> PKH-3FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 20 SHC(W) SHF P.C. Outdoor intake air °C DB 25 CA SHC(W) SHF P.C. CA 30 SHC(W) SHF P.C. 20 16 7970 5101 0.64 2.60 7752 4961 0.64 2.72 7467 4779 0.64 2.92 20 18 8486 4413 0.52 2.66 8262 4296 0.52 2.77 7961 4140 0.52 2.99 20 20 9007 3603 0.40 2.71 8796 3518 0.40 2.83 8482 3393 0.40 3.06 22 16 7970 5738 0.72 2.60 7752 5581 0.72 2.72 7467 5376 0.72 2.
PAGE 16
COOLING CAPACITY<8> PKH-3FKA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 35 SHC(W) SHF P.C. Outdoor intake air °C DB 40 CA SHC(W) SHF P.C. CA 45 SHC(W) SHF P.C. 20 16 7164 4585 0.64 3.13 6844 4380 0.64 3.35 6506 4164 0.64 3.56 20 18 7646 3976 0.52 3.21 7315 3804 0.52 3.43 6970 3624 0.52 3.65 20 20 8154 3262 0.40 3.29 7813 3125 0.40 3.52 7459 2984 0.40 3.76 22 16 7164 5158 0.72 3.13 6844 4928 0.72 3.35 6506 4685 0.72 3.
PAGE 17
COOLING CAPACITY<9> PKH-4FKSA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 20 SHC(W) SHF P.C. Outdoor intake air °C DB 25 CA SHC(W) SHF P.C. CA 30 SHC(W) SHF P.C. 20 16 9584 6709 0.70 2.65 9322 6525 0.70 2.77 8979 6285 0.70 2.98 20 18 10204 5919 0.58 2.71 9936 5763 0.58 2.82 9574 5553 0.58 3.05 20 20 10832 4983 0.46 2.76 10577 4865 0.46 2.88 10200 4692 0.46 3.11 22 16 9584 7476 0.78 2.65 9322 7271 0.78 2.77 8979 7004 0.78 2.
PAGE 18
COOLING CAPACITY<10> PKH-4FKSA-E Indoor Indoor Intake air Intake air °C DB °C WB CA 35 SHC(W) SHF P.C. Outdoor intake air °C DB 40 CA SHC(W) SHF P.C. CA 45 SHC(W) SHF P.C. 20 16 8615 6031 0.70 3.19 8230 5761 0.70 3.41 7824 5477 0.70 3.62 20 18 9194 5333 0.58 3.27 8797 5102 0.58 3.49 8381 4861 0.58 3.72 20 20 9806 4511 0.46 3.35 9396 4322 0.46 3.59 8970 4126 0.46 3.83 22 16 8615 6720 0.78 3.19 8230 6420 0.78 3.41 7824 6103 0.78 3.
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Cooling capacity correction factors Refrigerant piping length(one way) Service Ref. 5m 10m 15m 20m 25m 30m 35m 40m 45m 50m PKH-1.6FKA-E 1.00 0.093 0.984 0.978 0.969 0.961 0.956 0.948 - - PKH-2FKA-E 1.00 0.992 0.983 0.978 0.966 0.959 0.950 0.945 - - PKH-2.5FKA-E 1.00 0.989 0.980 0.970 0.960 0.950 0.940 0.930 0.920 0.910 PKH-3FKA-E 1.00 0.981 0.968 0.952 0.940 0.925 0.913 0.900 0.886 0.874 PKH-4FKSA-E 1.00 0.989 0.980 0.970 0.960 0.950 0.940 0.
PAGE 20
2. ELECTRICAL DATA Indoor unit · · · · · 220V 50Hz 1phase Outdoor unit · · · 220V 50Hz 1phase / 380V 50Hz 3phase Indoor unit Service Ref. Outdoor unit PKH-1.6FKA-E PKH-2FKA-E PKH-2.5FKA-E PUH-1.6VKA3.UK PUH-2VKA2.UK PUH-2.5VKA2.UK PUH-3VKA2.UK PUH-3YKA2.UK PUH-4YKSA2.UK Cool Capacity(W) 4,400 4,550 5,400 6,150 6,400 7,100 Total Input(kW) 1.43 1.39 2.19 2.21 2.51 Input(kW) 0.07 0.07 0.07 0.07 0.095 0.095 Current(A) 0.32 0.32 0.32 0.32 0.44 0.44 0.44 0.44 Starting current(A) 0.
PAGE 21
3. STANDARD OPERATION DATA Service Ref. PKH-1.6FKA-E PKH-2FKA-E PKH-2.5FKA-E Total Mode PKH-3FKA-E Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Capacity W 4,500 4,650 5,500 6,250 6,500 7,200 7,900 9,100 7,900 9,100 9,500 10,700 Input kW 1.51 2.27 2.56 3.25 3.25 3.31 1.48 2.29 2.33 Electrical circuit Indoor unit Service Ref. PKH-1.6FKA-E PKH-2FKA-E PKH-2.5FKA-E 3.04 3.
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SPL(db(A)) LINE 43 36 PKH-2.5FKA PKH-3FKA 90 90 80 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 APPROTIMATE TERESHOLD OF REARING FOR CONTINUOUS NOISE OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR 5. NOISE CRITERION CURVES NOTCH PKH-1.
PAGE 23
Front (Height ut unit) 68- 5 hole 53 491 476 450 405 Gas pipe position Liquid pipe position 2 X5 - 2.9 hole for tapping screw Knock out hole for left-rear piping Tapping screw 277 300 0 45 85 80 5 2. 323 276 229 R5 179 150 330 5 35 150 or more 190 60 (100 for left-hand side piping) Ref.pipes & drain pipe (Width of unit) 1250 215 Knock out hole for left-hand side piping 60 24 0 Sleeve Through hole 90 90~ 100 Details of installation plate 1 Sleeves are available on the market.
PAGE 24
37 74 A 30 32-ø12 hole for bolt 66-ø6 hole for tapping screw Wall fixture 100 4 39 225 18 39 990 180 12-ø6 hole for tapping screw 240 on left-hand side C 30 455 39 610 91 314 285 19 245 90 25 Drain hose for left-hand side piping Knock out hole for left piping Left side Range for left rear piping opening 280 Drainage range on right-hand side 37 74 Unit center 10 91=(910) 900 18 Drainage range 98 32 B 37 65 Knock out hole for piping A 100 4 45 45 1400 Front 235 552 Ai
PAGE 25
295 225 39 180 314 285 19 245 90 Range for left rear piping opening 280 750 Drainage range 91 on right-hand side 595 12-ø6 hole for tapping screw 240 25 Knock out hole for left piping 340 Drain hose for left-hand side piping 37 74 C 30 13 91=(1183) 900 1270 Drainage range on left-hand side 18 Range for left rear piping opening 41-ø12 hole for bolt 18 37 65 Unit center 98 65 Wall fixture 39 B 100 4 Knock out hole for wiring Unit out line 37 74 A 30 84-ø6 hole for tapping s
PAGE 26
Unit : mm 2. REMOTE CONTROLLER FILTER CHECK MODE TEST RUN TEST RUN 120 FILTER CHECK MODE REMOTE CONTROLLER PAR-JH241KA 18 130 83.5 Rear side wiring arrangement opening.
PAGE 27
WIRING DIAGRAM 5 PKH-1.6FKA-E / PKH-2FKA-E WHT LS RED MF GRN/YLW 11.1VAC 240V TB2 230V C 14.2VAC ZNR CN21 SW3 CN51 123 12 1 2 3 4 5 6 7 8 9 10 NAME FAN MOTOR CAPACITOR PROGRAM TIMER CONNECTOR REMOTE SWITCH CONNECTOR LOSSNAY CONNECTOR CENTRALLY CONTROL CONNECTOR EMERGENCY OPERATION CONNECTOR FUSE (6.3A 250V) INDOOR CONTROLLER BOARD DC 12V POWER LED DC 5V POWER LED LIMIT SWITCH FAN MOTOR VANE MOTOR REMOTE CONTROLLER BOARD ROOM TEMPERATURE THERMISTOR (0:/15".25:/5.
PAGE 28
PKH-2.5FKA-E / PKH-3FKA-E / PKH-4FKSA-E L N POWER SUPPLY ~(1 PHASE) AC220-240V 50Hz AC220V 60Hz GRN/YLW 10VAC 240V MF TB2 C FAN1 220V 14.3VAC 6 BRN RED BRN CN2L NAME FAN MOTOR CAPACITOR PROGRAM TIMER CONNECTOR REMOTE SWITCH CONNECTOR LOSSNAY CONNECTOR DRAIN LIFT-UP MECHANISM CONNECTOR CENTRALLY CONTROL CONNECTOR FUSE (6.
PAGE 29
6 REFRIGERANT SYSTEM DIAGRAM Unit : mm PKH-1.6FKA-E / PUH-1.6VKA3.UK PKH-2FKA-E / PUH-2VKA2.UK PKH-2.5FKA-E / PUH-2.5VKA2.UK PKH-3FKA-E / PUH-3VKA2 .UK, 3YKA2 .UK Oil separator Refrigerant pipe (option) 15.
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7 OPERATION FLOW-CHART MAIN OPERATION START Power circuit breaker 1 NO YES YES Check SW ON twice NO Operation SW ON w1 YES NO “OFF” timer YES NO NO Set time complete “ON” timer NO YES YES YES Set time complete w2 NO NO Trouble YES STOP Trouble STOP PROTECTION DEVICE SELF HOLD RELEASE PROTECTION DEVICE SELF HOLD Remote controller indicator lamp OFF w3 Remote controller trouble display Remote controller operation display Operating mode (COOL) NO Operating mode (DRY) NO Operating mo
PAGE 31
COOLING OPERATION COOL operation Four-way valve/OFF NO Initial COOLING w8 YES Vane initial setting Vane 60 deg downward angle 70 deg downward angle NO NO YES Fan speed LOW YES NO Vane setting notch Downward discharge 1 hour Vane horizontal airflow NO w9 Compressor YES thermostat ON NO Allowance cancel NO YES 3-minute time delay YES NO 6-minute time delay NO 3-minute compressor operation YES Allowance period NO 6 minute time delay NO w10 Allowance set YES Coil frost prevention Coil frost pr
PAGE 32
HEATING OPERATION A Heat operation w11 w15 Initial HEATING NO YES Vane setting notch PKH-FK Type YES Heating area NO Vane initial setting NO 2 YES YES Defrosting 3-minute NO Auxiliary heater OFF Defrost release NO Defrost 30 min. elapse Indoor coil NO thermstor is 60°C or higher Outdoor unit trouble NO Four-way valve ON 1 FAN speed Low notti YES YES Hor adjust in process Airflow 10% up NO YES Compressor ON YES NO NO YES Compressor thermostat ON w9 3 min.
PAGE 33
DRY OPERATION DRY operation Four-way valve / OFF NO Initial dry operation w8 YES Vane setting notch Vane initial setting YES Room temperature is 18°C or lower w 12 NO NO During compressor ON YES 3-minute compressor operation NO NO YES NO YES 3-minute time delay w9 Compressor & thermostat ON YES Compressor & thermostat ON w9 NO YES NO Compressor ON time completes 10-minute compressor OFF YES YES 10-minute compressor OFF timer start Compressor OFF W 14 Fan STOP w 13 Compressor ON ti
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8 MICROPROCESSOR CONTROL 1. OUTLINE OF MICROPROCESSOR CON- INPUT to remote controller ● OFF-ON switching. ● COOL/DRY-AUTO-HEAT selector switching. ● Thermostat setting. ● TIMER mode selector-switching and Timer setting. ● HIGH-LOW fan speed switching. ● AUTO Vane selector (AIR DISCHARGE) switching. ● TEST RUN switching. ● CHECK mode switching. (Self diagnostic trouble shooting) REMOTE CONTROLLER ● Processes and transmits orders.
PAGE 35
2. INDOOR UNIT CONTROL 2-1 COOL operation 1 Press POWER ON/OFF button. 2 Press the a button to display “ f ”. 3 Press the i TEMP. button to set the desired temperature. NOTE: The set temperature changes 1°C when the or button is press one time Cooling 19 to 30°C. FILTER CHECK MODE TEST RUN 241 Operation starts by POWER button ON. Room temperature becomes equal to set temperature. Room temperature rises above set temperature.
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(2) Indoor fan control Indoor fan speed LOW/HIGH depends on the remote controller setting. However, if an outdoor unit abnormality is detected, the indoor fan speed will be LOW, regardless of the remote controller setting. When the outdoor unit abnormality detection is released and the fan speed returns to the set speed, the quiet cycle control will work. (a) Normal control ( i ) Fan speed LOW/HIGH depends on the remote controller setting regardless of the thermostat ON/OFF.
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(3) Auto vane control Auto vane position is set to 10 degrees airflow at the start-up of COOL operation. It can then be changed by the remote controller. (a) Stop mode (fixed operation) ( i ) At start-up of COOL operation, the auto vane is set to 10 degrees airflow direction. ( ii ) Discharge direction can be changed with button. 1 Fan speed : LOW 10° 60° 70° (SWING) 60° 70° (SWING) 2 Fan speed : HIGH 30° 10° (b) SWING mode (Only PKH-2.
PAGE 38
(PKH-1.6FKA-E / PKH-2FKA-E) (a) The auto vane is driven by a 2.5 rpm motor. 1 10° 2 30° 3 60° 4 70° (b) Vane motor drive time Airflow direction change 50Hz Downward C → Horizontal 4→1 Horizontal → Downward A 1→2 Rise 2.1 0.65 Downward A → Horizontal B 2→3 Horizontal B → Downward C 3→4 6.7 0.65 (c) Airflow direction is based on the horizontal position detected by the vane motor limit switch.
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(5) Drain pump control (Option : Only PKH-2.5FKA-E / PKH-3FKA-E / PKH-4FKSA-E) The drain pump works in COOL or DRY operation. When operation stops or changes to HEAT mode, the drain pump continues to operate for 3 more minutes. The drain pump does not work in check mode. When both the drain pump and unit are operating, the drain sensor detects the temperature. This temperature tells whether the drain water level is above or under the drain sensor.
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(1) Compressor control 13-minute time delay To prevent overload, the compressor will not start within 3 minutes after stop. 2The compressor runs when the room temperature is higher than the set temperature. The compressor stops when the room temperature is equal to or lower than the set temperature. 3The compressor stops in check mode or during protective functions. 4The compressor will not start when the room temperature is below 18°C.
PAGE 41
2-3 HEAT operation 1 Press POWER ON/OFF button. 2 Press the a button to display “ g ”. 3 Press the i TEMP. button to set the desired temperature. NOTE: The set temperature changes 1°C when the or button is press one time Heating 17 to 28°C. FILTER CHECK MODE TEST RUN [ DEFROST ] The [ DEFROST ] symbol is only displayed during the defrost operation.
PAGE 42
(2) Indoor fan control (a) Normal control (!)The indoor fan runs on EXTRA-LOW speed during the thermostat OFF. EXTRA-LOW speed can be changed to LOW or HIGH speed by setting the dip switch SW1-7 and SW1-8,(PKH2.5/3/4 for J1-7, J1-8) If the indoor coil temperature becomes more than 5 degrees below the room temperature during the thermostat OFF, the indoor fan will stop. After, when the indoor coil temperature becomes within 5 degrees of room temperature, the indoor fan will run on EXTRA-LOW speed.
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(4) Detecting abnormalities in the outdoor unit When the outdoor unit is determined to be abnormal by the following causes, the compressor will stop and the check code “ P8 ” will appear on the remote controller display. 1 During compressor ON after hot adjustment [1] If the difference between the indoor coil temperature and room temperature is in the RANGE B, the indoor fan will w1 (See the next page.) stop.
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2-4 AUTO operation (Automatic COOL/HEAT change over operation) 1 Press POWER ON/OFF button. 2 Press the a button to display “ h ”. 3 Press the i TEMP. button to set the desired temperature. NOTE: The set temperature changes 1°C when the or button is press one time Auto 19 to 28°C. ●“AUTOMATIC” works to change by itself the operation mode either to cooling or heating according to the room temperature.
PAGE 45
2-5 Auto vane control To change the airflow direction, press button. FILTER CHECK MODE TEST RUN 241 10˚ Available in COOL operation with fan speed on HIGH or in HEAT operation. Unavailable in DRY operation. If fan speed changes from LOW to HIGH during 30° downward airflow in COOL mode, the direction automatically changes to 10°. 30˚ 60˚ 70˚ Swing Changes by pressing the button.
PAGE 46
2-6 TIMER operation AUTO STOP ·········The air conditioner stops after the set time lapses. AUTO START ········The air conditioner starts after the set time lapses. FILTER CHECK MODE AUTO OFF ············Timer is not active. TEST RUN 1. Press POWER ON/OFF button. 2. Press w button to select AUTO STOP or AUTO START. 3. Press q button to set desired time. 241 Time setting is in 1 hour units for up to 24 hours.
PAGE 47
(1) Indoor coil temperature code During the test run, the indoor coil temperature code from 1 to 15 is displayed on the remote controller instead of room temperature. The code should fall with the lapse of time in normal COOL operation, and should rise in normal HEAT operation.
PAGE 48
2-9 Interlock with ventilation system (LOSSNAY) Mr. SLIM/LOSSNAY interlock operation is available by using the optional parts listed below. (1) System organization Relay box (PZ-12RB-E) Relay box Mr. SLIM LOSSNAY LOSSNAY Power supply Mr. SLIM Power supply Remote controller Remote display adapter (PAC-SA88HA-E) LOSSNAY control switch (PZ-05SLB2-E) Remote controller LOSSNAY control switch (PZ-05SLB2-E) (2) LOSSNAY models connectable to Mr.
PAGE 49
2-10 Dip switch and jumper connector functions Each figure shows the initial factory setting. [1] On remote controller board (1) SW17(Address selector) 8 7654321 OFF ON SW17-1 ~ 6) For address setting SW17-7) When two remote controllers are used, this switch sets the controller function. OFF: The remote controller is set as a main controller. ON: The remote controller is set as a sub controller.
PAGE 50
(2) SW2 (Address selector) Used in setting the unit-address for group control. 123456 ON For further information, refer to page 68. OFF (3) SW3 (Emergency operation switch) Normal operation For emergency cooling 1 2 For emergency heating 1 2 ON OFF 1 2 ON OFF ON OFF (4) SW5 (Model selector) 1 2 3 4 ON OFF SW5-1) Power supply :230V/240V ( ON ) OFF:220V SW5-2) OFF:For models with heat pump. ON:For models without heat pump. SW5-3) Not for use SW5-4) This switch is unavailable for PKH-FK(S)A-E.
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J1-6) Switch for set temperature adjustment in HEAT mode During HEAT operation, warm air collects near the ceiling. When the indoor unit is installed near the ceiling, the temperature read by room temperature thermistor differs from the actual living-space temperature by about 4 degrees. Therefore, the room temperature read by room temperature thermistor must be lowered by 4 degrees.
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3. OUTDOOR UNIT CONTROL 3-1 Outdoor fan control The rotational frequency of outdoor fan is phase-controlled according to the outdoor coil temperature. This control allows the cooling operation even with the low outside-air temperature and the heating operation even with the high outside-air temperature. 3-2 Outdoor unit control The outdoor unit turns ON/OFF the cooling/heating operation according to orders given from the indoor unit.
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3-5 Defrosting in HEAT mode Defrosting starts. Indoor unit Defrosting stops. ON Indoor fan OFF Auto vane 10 degrees discharge direction. ON OFF CLOSE (Remote controller still displays set direction.) CLOSE Outdoor unit ON 4-way valve OFF Bypass valve ON OFF Outdoor fan ON OFF Compressor ON OFF (1) Start conditions A. When all of the following conditions are satisfied, defrosting will start.
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(3) Defrost interval The defrost interval time is determined as follows. ● Initial defrost interval is 50 minutes. ● The defrost interval after defrosting depends on the preceding defrosting time as shown below. Defrosting operation time 3 minutes or below Next defrost interval 120 minutes 3 to 7 minutes 80 minutes 7 to 10 minutes 60 minutes 10 to 15 minutes 40 minutes 15 minutes (Maximum) 30 minutes NOTE1:If the unit stops during defrosting , the next defrost interval will be 50 minutes.
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3-7 Service functions (1) Compulsory defrosting 1When all of the following conditions are satisfied, pressing SW2 starts the compulsory defrosting. ● During HEAT mode ● The compressor is ON. ● The outdoor coil temperature is being displayed by LED. (Outdoor controller board dip switch SW3-1 : OFF, SW3-2 : ON) ● The outdoor coil thermistor reads 8°C or below. 2The operation state and the termination conditions of the compulsory defrosting are the same as those of the normal defrosting.
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9 TROUBLESHOOTING 1.TROUBLE IN TEST RUN Symptom Cause Check points The display “CENTRALLY CONTROLLED” on remote controller dose not disappear. 1) Wrong address setting of remote controller/indoor controller board. 2) Timer adapter is connected to the remote controller. 3) Signal transmission error between indoor unit and remote controller. 1) Check the address setting of remote controller and indoor controller. 2) Make sure the timer adapter is used correctly.
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2. SELF DIAGNOSTIC FUNCTION WITH REMOTE CONTROLLER 2-1 When malfunction occurs during operation When a malfunction occurs, the indoor and outdoor units stop and the malfunction is displayed on the LCD of the remote controller. (A) ON the set temperature display part, “CHECK” appears, and the unit address and the check code are displayed alternately at one-second intervals.
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Check Diagnosis of malfunction Cause Check points code Signal transmitting/receiving During individual unit control 1) Check the transmission wire. EO error 1) Bad contact of transmission 2) Check with another remote controller. If “EO” is (Indoor controller does not wire still indicated, replace the indoor controller respond to remote controller 2) Signal transmitting/receiving cirboard. signal.) cuit is abnormal. If other check code appears. replace the original remote controller.
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3. SERVICE DATA INDICATION BY SWITCHES ON OUTDOOR CONTROLLER BOARD Setting dip switches SW2 and SW3 on the outdoor controller board enables LED to show the output state and check code. Output state is shown by LED lighting, and check code by blinking. SW1 : Turning SW1 ON clears the check code. If SW1 is turned ON while the check code is blinking , the indication changes to output state indication. NOTE : SW1 is usually available independent of SW3 setting.
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3-1 Outdoor coil temperature To obtain data on the outdoor coil temperature, add the number of bits of lighting LED, and see the graph below to find the temperature. C 100 (Short (Short 38 238bits) bits) 80 60 Temperature 40 20 0 -20 -40 (Open (Open219 8 bits) bits) 0 50 100 150 200 255 Number of bits 3-2 Fan output step To obtain data on the fan output step, add the number of bits of lighting LED, and see the graph below to find the fan rotational frequency. 1PUH-1.6/2VKA PUH-4YKSA 2PUH-2.
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4. TROUBLESHOOTING ACCORDING TO CHECK CODE Blinking Diagnosis of malfunction LED LD1 Reversed phase Cause Check point Phases L1, L2, and L3 are con- Check the power supply connection. nected improperly. LD2 Open phase LD3 Outdoor coil thermistor is ● Outdoor coil thermistor is abnormal. (Open circuit or short broken. circuit) ● Thermistor was connected incorrectly. LD4 High pressure switch (63H2) function ● 62H2 was badly connected. ● 63H2 was working. ● Check 63H2 and the outdoor fan motor.
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6. WRONG WIRING ON SITE 6-1 Between remote controller and indoor unit If the wire is disconnected between the remote controller and the indoor unit, nothing is displayed on the remote controller when the POWER button is pressed. The beep sound will also not be heard.
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7. OTHER TROUBLES AND CAUSES Vanes do not work. t Unit stops after 5 to 20 seconds operation Protection function is working. t Airflow display is OFF and button does not operate. In this case, remote controller is normal. Power ON/OFF button is not available. Vane motor does not work. Limit switch does not work. Connector is poorly connected. Vane motor is poorly assembled. Indoor controller board is damaged. t Indoor controller board deems the auto vanes are not attached to the unit.
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8.MR. SLIM/LOSSNAY INTERLOCK OPERATION If any of the following symptoms occur, they are not malfunctions. Symptom Cause LOSSNAY control switch does not work. LOSSNAY control switch can not work during interlock operation. LOSSNAY control switch is effective only while Mr. SLIM is not operating. LOSSNAY air speed can not be controlled in interlock operation. LOSSNAY fan speed is fixed to HIGH during interlock operation.
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10 SYSTEM CONTROL 1. VARIETY OF SYSTEM CONTROL FUNCTIONS 1 Group control with a single remote controller (See page 66.) Unit Unit Many units, installed at different locations, can be started and controlled with a single remote controller. The remote controller can be mounted in a different location using a non-polar two-wire cable, which can be extended up to 500m. A maximum of 50 units can be controlled with a single remote controller. All units operate in the same mode.
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2. GROUP CONTROL WITH A SINGLE REMOTE CONTROLLER A maximum of 50 units can be started in order according to the dip switch settings 2-1 How to wire (1) Connect the remote controller to the double terminal block on the indoor controller board of the master unit (No.0 unit). (See Figure 1.) (2) Connect the double terminal block of the master unit to the double terminal block of No.1 unit. (3) Connect the double terminal block of No.1 unit to the double terminal block of No.2 unit.
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3. REMOTE ON-OFF AND INDIVIDUAL REMOTE CONTROLS This method is available to control one unit or any number of units. The following operations are available by connecting a relay, a timer adapter (PAC-SA89TA-E), and a remote ON/OFF switch to the system. Timer adapter is an optional part. Other parts are available on the market.
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3-3 Switch function of remote ON-OFF switch SW1 (Switches between remote ON and OFF.) ON (Start) OFF (Stop) SW2 (Switches between remote ON-OFF and individual control) ON OFF (Remote ON-OFF control) (Individual control) All units start together. w1 Each unit can be controlled by each Individual control is not available. remote controller. All units stop together. w2 Remote ON-OFF switch is not available. Individual control is not available.
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Indoor controller board 5. MULTIPLE REMOTE CONTROL DISPLAY You can control several units with a multiple remote control display,by wiring an optional multiple display adapter (PAC-SA88HA-E) with relays and lamps on the market. 5-1 How to wire (1) Connect the multiple display adapter to the connector CN51 on the indoor controller board. (2) Wire three of the five wires from the multiple display adapter as shown in the figure below.
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11 DISASSEMBLY PROCEDURE PKH-3FKA-E OPERATING PROCEDURE PHOTOS&ILLUSTRATION 1. Removing the lower side of the indoor unit from the installation plate (1) Remove the 2 screws. Hang the indoor unit hangers to the catches on the installation plate. Figure 1 Hanger of indoor unit Catch of installation plate Metal fixture Screws 2. Removing the right side panel (1) Remove the 2 screws of the right side panel:one on the bottom and the other on the upper right-hand side.
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OPERATING PROCEDURE PHOTOS&ILLUSTRATION (9) Remove the screws of the indoor controller board case, and pull out the indoor controller board case. Then the transformer and the capacitor and relay can be serviced. Photo 3 Relay Transformer Capacitor Indoor controller board case 5. Removing the vane motor (1) Remove the right side panel. (2) Remove the screw of the electrical parts box cover, and remove the cover. (3) Remove the 2 screws of the vane motor, and remove the motor from the shaft.
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OPERATING PROCEDURE PHOTOS 8. Removing the lineflow fan and the fan motor (1) Remove the left and right side panels. (2) Remove the grills. (3) Remove the electrical parts box. (4) Remove the drain pan. (5) Loosen the screw that fixes the lineflow fan to the fan motor. (See Photo 7. ) (6) Remove the 4 screws of the motor fixture, and remove the fan motor and the motor fixture at a time (See Photo 8.
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12 PARTS LIST STRUCTURAL PARTS PKH-1.6FKA -E PKH-2FKA -E 1 7 3 9 6 8 3 9 5 3 10 2 4 , Q ty/set No. Part No. Part Name Specification PKH-1.6/2 Remarks (Drawing No.
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ELECTRICAL PARTS PKH-1.6FKA -E PKH-2FKA -E 2 5 21 4 22 FILTER CHECK MODE TEST RUN 36 6 34 11 18 38 35 19 20 30 24 8 3 1 25 9 7 13 29 14 15 16 17 26 37 31 10 28 27 12 33 32 , Q ty/set PKH-1.6 PKH-2 FKA-E FKA-E 1 1 2 R01 KV5 114 LINEFLOW FAN 1 1 3 R01 KV5 105 RUBBER MOUNT 2 2 4 R01 KV5 106 BEARING SUPPORT 1 1 5 R01 566 103 SLEEVE BEARING 1 1 6 R01 KV5 102 BEALING MOUNT 1 1 7 R01 KV5 130 MOTOR SUPPORT 1 1 8 R01 93W 530 NOZZLE ASSEMBLY 1 1 No. Part No.
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Part number that is circled is not shown in the figure. , Q ty/set Price Wiring RecomRemarks Diagram mended (Drawing No.) Symbol Q,ty Unit Amount PKH-1.6 PKH-2 FKA-E 1 FKA-E 1 1 1 TB4 18 R01 588 255 FAN MOTOR CAPACITOR 2.0µF 440V 1 1 C 19 R01 J07 202 INDOOR COIL THERMISTOR 1 1 RT2 20 T7W 53J 799 TRANSFORMER 1 1 T No. Part Name Part No.
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ELECTRICAL PARTS PKH-2.5FKA -E PKH-3FKA -E PKH-4FKSA -E 8 37·38 34 10 FILTER CHECK MODE TEST RUN 39 5 7 11 9 22 12 14 13 6 1 4 16 2 19 3 31 35 28 27 20 18 17 25 32 33 16 26 29 21 15 36 30 23 24 , Q ty/set No. 1 2 Part No. Part Name Price Wiring RecomRemarks Diagram mended Specification PKH-2.5 PKH-3 PKH-4 (Drawing No.
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, Q ty/set No. Part Name Part No. Specification PKH-2.5 FKA-E PKH-3 PKH-4 FKA-E FKSA-E 10 R01 Z61 102 BEARING MOUNT 1 1 1 11 R01 KV5 102 BEARING MOUNT Price Wiring RecomRemarks Diagram mended (Drawing No.
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STRUCTURAL PARTS PKH-2.5FKA -E PKH-3FKA -E PKH-4FKSA -E 11 8 10 2 7 6 3 1 5 Part number that are circled are not shown in the figure. , Q ty/set Price PKH-2.5 PKH-3 PKH-4 FKA-E FKA-E FKSA-E 1 R01 12G 661 RIGHT SIDE PANEL 1 1 1 2 R01 12G 662 LEFT SIDE PANEL 1 1 1 3 R01 12G 691 INTAKE GRILLE 2 2 2 4 4 1 1 1 1 1 1 1 1 1 1 1 1 No. Part No.
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13 OPTIONAL PARTS 1. REFRIGERANT PIPES Service Ref. : PKH-1.6FKA-E/PKH-2FKA-E/PKH-2.5FKA-E/PKH-3FKA-E Part No Pipe length Pipe size O.D. Connection method PAC-05FFS-E 5C PAC-07FFS-E 7C Liquid:{9.52 Indoor unit:Flared PAC-10FFS-E 10C Gas:{15.88 Outdoor unit:Flared PAC-15FFS-E 15C PAC-SC51PI-E 5C PAC-SC52PI-E 7C Liquid:{9.52 Indoor unit:Flared PAC-SC53PI-E 10C Gas:{19.05 Outdoor unit:Flared PAC-SC54PI-E 15C Service Ref. : PKH-4FKSA-E Part No Pipe length Pipe size O.D. Connection method Note 1.
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2-3. How to connect program timer (1) Install the program timer next to the remote controller the same way as the remote controller is installed. (2) Connect the program timer and the remote controller with a 6-wire cable as shown in the figure below 2-wire cable NOTE:While the program timer is connected to the remote controller, the 24hour ON/OFF timer on the remote controller will not operate.
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4. MULTIPLE REMOTE CONTROLLER ADAPTER This adapter is needed for remote indication (operation/check). Adapter connection is described on page 84. Part No. PAC-SA88HA-E BRN RED ORN YLW GRN 1 2 3 4 5 5. CENTRALIZED REMOTE CONTROLLER Allows individual or combined control of up to 16 units. When using the PAC-805RC, the program timer adapter (PAC825AD)is also needed. See page ##. Part No. PAC-805RC 5-1. Dimensions Unit : mm 113 56.3 12 23.
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5-3 Connection method (1) Connections in the power supply cord. 1. Connect the power supply cord to the power supply terminal-block and fix it in-place with a tie-wrap. Connect a single phase 200V AV (220, 230, 240V) to A N. As E is the GND terminal, be sure to ground the earth wire. 2. Connect the transmission line to the transmission terminal-block and fix it in-place with a tie-wrap. Use a Ø1.6 (AWG 14) or above two-wire cable for the transmission line.
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6. PROGRAM TIMER ADAPTER This adapter is needed when a program timer(PAC-SC32PTA)or a centralized remote controller(PAC-805RC)is used. Part No.
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7. DRAIN PUMP Part No. (Only for PKH-2.5FKA-E / PKH-3FKA-E / PKH-4FKSA-E). PAC-SE89DM-E HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO cCopyright 1999 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Issued in Sep. 1999. NO.OC190 541 Printed in Japan New publication, effective Sep. 1999.