Service manual

ManualsBrandsMitsubishi ManualsAir ConditionerPKH-3FKA

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

CONTENTS

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

2. PART NAMES AND FUNCTIONS········3

3. SPECIFICATIONS·································5

4. DATA···················································13

5. OUTLINES AND DIMENSIONS··········20

6. WIRING DIAGRAM·····························24

REFRIGERANT SYSTEM DIAGRAM

······26

8. OPERATION FLOW-CHART··············28

9. MICROPROCESSOR CONTROL·······32

10. TROUBLESHOOTING ························54

11. SYSTEM CONTROL ···························63

12. DISASSEMBLY PROCEDURE···········68

13. PARTS LIST········································71

14. OPTIONAL PARTS ·····························80

Indoor unit

[ Model names ] [ Service Ref. ]

PKH-2FKA PKH-2FKA

PKH-2.5FKA PKH-2.5FKA

PKH-2.5FKA

PKH-3FKA PKH-3FKA

PKH-3FKA

PKH-4FKSA PKH-4FKSA

PKH-4FKSA

No. OC132

REVISED EDITION-A

2001

Indoor unit

Wall Mounted

Series PKH

FILTER

CHECK MODE

CHECK

TEST RUN

REMOTE CONTROLLER

• PKH-2.5FKA

, PKH-3FKA

and

PKH-4FKSA

are added in

REVISED EDITION-A.

• Please void OC132 .

• This manual does not cover

outdoor units. When servicing

them, please refer to the service

manual No.OC128 REVISED

EDITION-C and this manual in

a set.

[Service Ref.]

PUH-2VKA

2, PUH-2VKA3,

PUH-2NKA1, PUH-2NKA2,

PUH-2.5VKA2, PUH-2.5VKA3,

PUH-2.5NKA1, PUH-2.5NKA2,

PUH-3VKA2, PUH-3VKA3,

PUH-3YKA2, PUH-3YKA3,

PUH-3YKA4,

PUH-3NKA1, PUH-3NKA2,

PUH-4YKSA3, PUH-4YKSA4,

PUH-4TKSA1

OC132--1.qxp 1.11.8 10:42 AM Page 1

Summary of content (86 pages)

PAGE 1
OC132--1.qxp 1.11.8 10:42 AM Page 1 2001 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OC132 REVISED EDITION-A TECHNICAL & SERVICE MANUAL Series PKH Wall Mounted Indoor unit [ Model names ] [ Service Ref. ] PKH-2FKA3 PKH-2.5FKA2 PKH-2.5FKA3 PKH-3FKA2 PKH-3FKA3 PKH-4FKSA2 PKH-4FKSA3 PKH-2FKA PKH-2.5FKA PKH-3FKA PKH-4FKSA • PKH-2.5FKA3, PKH-3FKA3 and PKH-4FKSA3 are added in REVISED EDITION-A. • Please void OC132 . • This manual does not cover outdoor units.
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OC132--1.qxp 1.11.8 10:42 AM Page 2 1 TECHNICAL CHANGES ● PKH-2.5FKA2 ➔ PKH-2.5FKA3 ● PKH-3FKA2 ➔ PKH-3FKA3 ● PKH-4FKSA2 ➔ PKH-4FKSA3 •NOSE shape has changed. •UNDER PLATE shape has changed. •TOP PLATE shape has changed. •DRAIN PAN shape has changed. •BOX ASSEMBLY shape has changed. •The specifications of these power supply voltages have been added: 50Hz 220-230-240V; 50Hz 380-400-415V.
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OC132--1.qxp 1.11.8 10:42 AM Page 3 2 PART NAMES AND FUNCTIONS ● Indoor Unit Air intake Filter Room air is suctioned in here. Air intake grille (Removes dust and dirt from the intake air.) Guide vane Auto vane Air flow can be changed to horizontally by moving the Guide vane to the left or right. Air outlet Air outlet ● Remote controller ● Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button repeatedly.
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OC132--1.qxp 1.11.8 10:42 AM Page 4 ● 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. display The selected fan speed is displayed.
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OC132--1.qxp 1.11.8 10:42 AM Page 5 3 SPECIFICATIONS 50Hz Service Ref. Item Function Capacity 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) > Cond. drain connection. O.D. A W A
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OC132--1.qxp 1.11.8 10:42 AM Page 6 50Hz Service Ref. PKH-2.5FKA2 PKH-2.5FKA3 Item Function Capacity Cooling Heating 6,500 7,200 22,200 24,600 2.56 2.33 PKH-2.5FKA2 PKH-2.5FKA3 Single Phase, 50Hz, 220-230-240V 0.095 0.095 0.44 0.44 0.80 0.80 Munsell 3.4Y 7.7/0.8(White) Plate fin coil Line flow(direct) ✕ 2 0.040 15-20<530-706> 0(direct blow) — Remote controller & built-in 39-45 20<13/16> 1,400<55-1/8> 235<9-1/4> 340<13-3/8> 26<57> PUH-2.5VKA2 PUH-2.5VKA3 Single Phase, 50Hz, 220-230-240V 2.46 2.23 10.
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OC132--1.qxp 1.11.8 10:42 AM Page 7 50Hz Service Ref. Item Function Capacity Cooling Heating 7,900 9,100 27,000 31,000 3.25 3.04 PKH-3FKA2 PKH-3FKA3 Single Phase, 50Hz, 220-230-240V 0.095 0.095 kW 0.44 0.44 A 0.80 0.80 A Munsell 3.4Y 7.7/0.8(White) Plate fin coil Line flow(direct) ✕ 2 0.040 kW 15-20<530-706> m3/X 0(direct blow) Pa(mmAq) — kW Remote controller & built-in 39-45 > 20<13/16> A 1,400<55-1/8> A 235<9-1/4> A 340<13-3/8> A
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OC132--1.qxp 1.11.8 10:42 AM Page 8 50Hz Service Ref. Item Function Capacity 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(drive) ✕ No. Fan Fan motor output kW Airflow(Low-High) m3/X External static pressure Pa(mmAq) Booster heater kW Operation control & Thermostat Noise level(Low-High) > Cond. drain connector. O.D. A W A Dimensions D A
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OC132--1.qxp 1.11.8 10:42 AM Page 9 60Hz Service Ref. Item PKH-2FKA3 Cooling 5,800/5,100 19,800/17,400 2.49/2.91 Function W Btu/h kW Capacity Total input Service Ref. Power supply(Phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger Fan(drive)oNo. Fan Fan motor output Airflow(Low-High) External static pressure Booster heater Operation control & Thermostat Noise level(Low-High) Cond. drain connection O.D. REFRIGERANT PIPING Weight Refrigerant Charge Munsell 3.
PAGE 10
OC132--1.qxp 1.11.8 10:42 AM Page 10 60Hz Service Ref. Item Function W Btu/h kW Capacity Total input Service Ref. Power supply(Phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger Fan(drive)oNo. Fan Fan motor output Airflow(Low-High) External static pressure Booster heater Operation control & Thermostat Noise level(Low-High) Cond. drain connection O.D. INDOOR UNIT kW A A OUTDOOR UNIT Dimensions W D H Weight Service Ref.
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OC132--1.qxp 1.11.8 10:42 AM Page 11 60Hz Service Ref. Item PKH-3FKA2 PKH-3FKA3 Cooling 7,800/6,900 26,600/23,500 3.62/4.23 Function W Btu/h kW Capacity Total input Service Ref. Power supply(Phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger Fan(drive)oNo. Fan Fan motor output Airflow(Low-High) External static pressure Booster heater Operation control & Thermostat Noise level(Low-High) Cond. drain connection O.D.
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OC132--1.qxp 1.11.8 10:42 AM Page 12 60Hz Service Ref. Item Function W Btu/h kW Capacity Total input Service Ref. Power suppl(Phase, cycle, voltage) Input Running current Starting current External finish Heat exchanger Fan(drive)oNo. Fan Fan motor output Airflow(Low-High) External static pressure Booster heater Operation control & Thermostat Noise level(Low-High) Cond. drain connection O.D. INDOOR UNIT kW A A OUTDOOR UNIT Dimensions W D H Weight Service Ref.
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OC132--1.qxp 1.11.8 10:42 AM Page 13 4 DATA 1. PERFORMANCE DATA 1) COOLING CAPACITY 50Hz Service Ref. PKH-2FKA3 PKH-2.5FKA2 PKH-2.5FKA3 PKH-3FKA2 PKH-3FKA3 PKH-4FKSA2 PKH-4FKSA3 Indoor Intake air W.B.: 20 P.C. CA 25 CA P.C. Outdoor intake air D.B.: 35 40 30 CA P.C. CA P.C. CA P.C. 45 CA P.C. 16 5,549 1.82 5,397 1.90 5,198 2.04 4,988 2.19 4,765 2.34 4,530 2.49 18 5,908 1.86 5,752 1.94 5,543 2.09 5,323 2.24 5,093 2.40 4,852 2.55 20 6,271 1.89 6,124 1.97 5,905 2.13 5,677 2.
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OC132--1.qxp 1.11.8 10:42 AM Page 14 3) HEATING CAPACITY 50Hz Service Ref. PKH-2FKA3 PKH-2.5FKA2 PKH-2.5FKA3 PKH-3FKA2 PKH-3FKA3 PKH-4FKSA2 PKH-4FKSA3 Indoor Intake air W.B.°C 15 20 25 15 20 25 15 20 25 15 20 25 -10 CA 4,280 4,098 3,939 4,931 4,721 4,537 6,232 5,967 5,735 7,328 7,016 6,743 P.C. 1.73 1.86 1.98 1.76 1.89 2.02 2.29 2.47 2.63 2.49 2.68 2.86 Outdoor intake air D.B.°C 0 5 CA P.C. CA P.C. 5,591 1.90 6,336 2.09 5,380 2.05 6,100 2.25 5,167 2.19 5,874 2.41 6,441 1.93 7,229 2.12 6,198 2.
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OC132--1.qxp 1.11.8 10:42 AM Page 15 2. PERFORMANCE CURVE Cooling Heating INDOOR W.B.(:) 1.2 1.0 22 20 18 16 0.8 0.6 TOTAL INPUT (RATIO) 15 20 25 1.2 INDOOR D.B. (:) 1.0 0.8 0.6 1.4 22 20 18 16 1.2 INDOOR W.B.(:) 1.0 0.8 0.6 0.4 -5 CAPACITY (RATIO) 1.4 TOTAL INPUT (RATIO) CAPACITY (RATIO) 1.4 5 1.4 INDOOR D.B. (:) 1.2 25 20 15 1.0 0.8 0.6 0.4 -12-10 15 25 35 46 OUTDOOR D.B.(:) 15 -5 0 5 10 15 OUTDOOR W.B.
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OC132--1.qxp 1.11.8 10:42 AM Page 16 3. ELECTRICAL DATA 50Hz Indoor unit · · · · · 220V 50Hz 1phase Outdoor unit · · · 220V 50Hz 1phase / 380V 50Hz 3phase Indoor unit PKH-2FKA3 PKH-2.5FKA2 PKH-2.5FKA3 Outdoor unit PUH-2VKA2 PUH-2VKA3 PUH-2.5VKA2 PUH-2.5VKA3 Service Ref. Mode Cool Capacity(W) 5,400 6,150 Total Input(kW) Cool Heat PUH-4YKSA3 PUH-4YKSA4 Heat PUH-3YKA2 PUH-3YKA3 PUH-3YKA4 Cool Heat 7,800 9,000 7,800 9,000 9,400 10,500 PUH-3VKA2 PUH-3VKA3 Cool Cool Heat 2.19 2.21 2.
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OC132--1.qxp 1.11.8 10:42 AM Page 17 3. ELECTRICAL DATA 60Hz Indoor unit · · · · · 220V 60Hz 1phase Outdoor unit · · · 220V 60Hz 1phase/3phases Rating condition (Cooling)...Indoor D.B. 27:, W.B. 19: Outdoor D.B. 35: PKH-2.5FKA2 PKH-2FKA3 Indoor unit PKH-2.5FKA3 Service Ref. PUH-2NKA1 PUH-2.5NKA1 Outdoor unit PUH-2NKA2 PUH-2.5NKA2 Outdoor unit Indoor unit Mode Capacity (W) Total Input (kW) Input (kW) Current (A) Starting current (A) Input (kW) Current (A) Starting current (A) Cooling 5,800 2.49 0.08 0.
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OC132--1.qxp 1.11.8 10:42 AM Page 18 4. STANDARD OPERATION DATA 50Hz Service Ref. PKH-2FKA3 Total Mode Electrical circuit Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 6,500 7,200 7,900 9,100 7,900 9,100 9,500 10,700 2.56 2.33 3.25 3.04 3.25 3.04 3.31 3.30 W 5,500 6,250 Input kW 2.27 2.29 PKH-2FKA3 PKH-2.5FKA2 PKH-2.5FKA3 PKH-3FKA2 PKH-3FKA3 PKH-4FKSA2 PKH-4FKSA3 Phase,Hz 1,50 1,50 1,50 1,50 Volts 240 240 240 240 Amperes 0.
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OC132--1.qxp 1.11.8 10:42 AM Page 19 4. STANDARD OPERATION DATA 60Hz Electrical circuit Total Mode Capacity Input Indoor unit Service Ref. Phase, Hz Volts Amperes W KW V A Outdoor unit Service Ref. Refrigerant circuit Phase, Hz Volts Amperes Outdoor Indoor side side PKH-2.5FKA2 PKH-2.5FKA3 PKH-3FKA2 PKH-3FKA3 PKH-4FKSA2 PKH-4FKSA3 PKH-2FKA3 Cooling Heating 7,000 8,000 3.01 2.90 PKH-2.5FKA2 PKH-2.5FKA3 Cooling Heating 7,800 9,500 3.62 3.43 PKH-3FKA2 PKH-3FKA3 Cooling Heating 10,400 12,200 4.
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Front (Height ut unit) 68- 5 hole 53 476 450 405 Gas pipe position Liquid pipe position 2 X5 - 2.9 hole for tapping screw Knock out hole for left-rear piping 45 85 80 5 2. 323 276 229 R5 179 150 330 R 35 150 or more 190 60 (100 for left-hand side piping) Ref.
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100 4 39 32-ø12 hole for bolt 66-ø6 hole for tapping screw Wall fixture 37 74 A 30 225 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 4 340 30 10 184 30 30 80 29 280
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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 Drainage range on left-hand side 18 Range for left rear piping opening 41-ø12 hole for bolt 18 1270 Unit center 98 65 Wall fixture 39 B 37 65 Knock out hole for wiring Unit out line 37 74 A 30 84-ø6 hole for tapping screw 10
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OC132--1.qxp 1.11.8 10:42 AM Page 23 Unit : mm(inch) 2. REMOTE CONTROLLER FILTER FILTER CHECK CHECK MODE TEST RUN TEST RUN 120 CHECK MODE 18 130 Rear side wiring arrangement opening. 83.
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OC132--1.qxp 1.11.8 10:42 AM Page 24 6 WIRING DIAGRAM PKH-2FKA3 POWER SUPPLY ~(1 PHASE) AC220-240V 50Hz AC220V 60Hz L N WHT LS RED MF GRN/YLW 11.1VAC 220V TB2 230V C 14.2VAC 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°C/15KΩ.
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OC132--1.qxp 1.11.8 10:42 AM Page 25 PKH-2.5FKA2 PKH-3FKA2 PKH-4FKSA2 PKH-2.5FKA3 PKH-3FKA3 PKH-4FKSA3 L N POWER SUPPLY ~ (1 PHASE) AC220-240V 50Hz AC220V 60Hz GRN/YLW 10VAC 240V MF TB2 C FAN1 220V 14.3VAC 1 3 CNT TRANS POWER 1 BRN RED BRN SYMBOL TB4 3 2 1 RT1 4FKSA ON OFF 1 2 3 4 TRANSMISSION WIRES DC12V TO OUTDOOR UNIT CONNECTING WIRES DC12V R.
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OC132--1.qxp 1.11.8 10:42 AM Page 26 7 REFRIGERANT SYSTEM DIAGRAM PKH-2FKA3 PKH-2.5FKA2 , PKH-3FKA2 , / / / / PKH-2.5FKA3 PKH-3FKA3 PUH-2VKA2 , PUH-2.5VKA2 , PUH-3VKA2 , PUH-3YKA2 , High pressure control switch Oil separator Refrigerant pipe (option) 15.88mm( 5/8") (with heat insulator) Indoor unit Unit : mm PUH-2VKA3 PUH-2.
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OC132--1.qxp 1.11.8 10:42 AM Page 27 Unit : mm PKH-2FKA3 / PUH-2NKA1, PUH-2NKA2 PKH-2.5FKA2, PKH-2.5FKA3 / PUH-2.5NKA1, PUH-2.5NKA2 Refrigerant pipe (option) 15.88mm([5/8") (with heat insulator) Indoor unite Ball valbe Strainer Refrigerant flow in cooling Refrigerant flow in heating R.V.
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OC132--1.qxp 1.11.
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OC132--1.qxp 1.11.
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OC132--1.qxp 1.11.8 10:42 AM Page 30 HEATING OPERATION A Heat operation w11 w15 NO Initial HEATING Heating area YES Vane setting notch PKH-FK Type YES YES 3-minute NO Auxiliary heater OFF YES Indoor coil NO thermistor is 60°C or higher NO NO Defrost 30 min. elapse Vane initial setting Defrost release 2 YES YES Defrosting Outdoor unit trouble NO YES Four-way valve ON FAN speed Low notch 1 YES Hot adjust in process YES Compressor ON NO NO Compressor YES w9 thermostat ON 3 min.
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OC132--2.qxp 1.11.
PAGE 32
OC132--2.qxp 1.11.8 10:17 AM Page 32 9 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) ● Processes and transmits orders.
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OC132--2.qxp 1.11.8 10:17 AM Page 33 2. INDOOR UNIT CONTROL 2-1 COOL operation 1 Press POWER ON/OFF button. 2 Press the 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 CHECK MODE TEST RUN Operation starts by POWER button ON. Room temperature becomes equal to set temperature.
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OC132--2.qxp 1.11.8 10:17 AM Page 34 5 Coil frost protection When indoor coil temperature becomes -15°C or below, coil frost protection will proceed as follows. After the compressor has been continuously operated for 3 minutes or more,and the indoor coil temperature has been -15°C or below for 3 minutes,the coil frost protection will start. Compressor stops for 6 minutes, and then restarts.
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OC132--2.qxp 1.11.8 10:17 AM Page 35 (3) Auto vane control Auto vane position is set to 10degrees discharge at the start-up of COOL operation. It can then be changed by the remote controller. (a) Stop mode (fixed operation) (!) At start-up of COOL operation, the auto vane is set to 10 degrees discharge direction. (@) Discharge direction can be changed with AIR DISCHARGE UP/DOWN button. 1 Fan speed : LOW 10° 60° 70° (SWING) 60° 70° (SWING) 2 Fan speed : HIGH 10° 30° (b) SWING mode (Only PKH-2.
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OC132--2.qxp 1.11.8 10:17 AM Page 36 (PKH-2FKA3) (a) The auto vane is driven by a 2.5 rpm motor. (b) Discharge direction can be selected between the No.1 and No.2 setting. (Initial setting is No.1) 1 2 3 4 10° 30° 60° 70° (c) Vane motor drive time Unit : sec. Discharge direction change 50Hz 60Hz Downward C → Horizontal 4→1 Rise 2.1 Rise 1.75 Horizontal → Downward A 1→2 0.65 0.55 Downward A → Downward B 2→3 6.7 5.55 Downward B → Downward C 3→4 0.65 0.
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OC132--2.qxp 1.11.8 10:17 AM Page 37 2-2 DRY operation CHECK 1 Press POWER ON/OFF button. 2 Press the button to display “ e ”. 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 Operation starts by POWER button ON. Room temperature becomes equal to set temperature. Room temperature rises above set temperature.
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OC132--2.qxp 1.11.8 10:17 AM Page 38 (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.
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OC132--2.qxp 1.11.8 10:17 AM Page 39 2-3 HEAT operation 1 Press POWER ON/OFF button. 2 Press the 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 Cooling 17 to 28°C. FILTER CHECK CHECK MODE TEST RUN [ DEFROST ] The [ DEFROST ] symbol is only displayed during the defrost operation.
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OC132--2.qxp 1.11.8 10:17 AM Page 40 (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 lower than the set temperature.The compressor stops when the room temperature is equal to or higher than the set temperature. 3The compressor stops in check mode or during protective functions.
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OC132--2.qxp 1.11.8 10:17 AM Page 41 (3) Auto vane control (a) STOP mode (fixed operation) (!) The discharge direction at the start-up of HEAT operation is the same as that of the previous operation. (@) The discharge direction can be changed by the remote controller setting. 10° 30° 60° 70° (SWING) In the following cases, discharge direction becomes 10° regardless of the remote controller setting.
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OC132--2.qxp 1.11.8 10:17 AM Page 42 2-4 AUTO operation (Automatic COOL/HEAT change over operation) 1 Press POWER ON/OFF button. 2 Press the button to display “ ”. 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 28°C. ●“AUTOMATIC” works to change by itself the operation mode either to cooling or heating according to the room temperature.
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OC132--2.qxp 1.11.8 10:17 AM Page 43 2-5 Auto vane control To change the air flow direction, press CHECK button. FILTER CHECK MODE TEST RUN 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 discharge in COOL mode, the direction automatically changes to 10°. 30° 60° 70° SWING Changes by pressing the button.
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OC132--2.qxp 1.11.8 10:17 AM Page 44 2-6 TIMER operation AUTO STOP ·········The air conditioner stops after the set time lapses. FILTER CHECK AUTO START ········The air conditioner starts after the set time lapses. CHECK MODE TEST RUN AUTO OFF ············Timer is not active. 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. Time setting is in 1 hour units for up to 24 hours.
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OC132--2.qxp 1.11.8 10:17 AM Page 45 (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.
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OC132--2.qxp 1.11.8 10:17 AM Page 46 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) Remote controller LOSSNAY control switch (PZ-05SLB2-E) LOSSNAY control switch (PZ-05SLB2-E) (2) LOSSNAY models connectable to Mr.
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OC132--2.qxp 1.11.8 10:17 AM Page 47 2-10 Dip switch and jumper connector functions Each figure shows the initial factory setting. 1 On remote controller board (1) SW17(Address selector) 12345678 ON OFF 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.
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OC132--2.qxp 1.11.8 10:17 AM Page 48 (2) SW2 (Address selector) 123456 Used in setting the unit-address for group control. ON For further information, refer to page 55.
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OC132--2.qxp 1.11.8 10:17 AM Page 49 J1-4) Switch for drain pump Provided : The drain pump works in only COOL operation Not provided: The drain pump works in both COOL and HEAT operation Switch to change the temperature to start coil frost prevention Provided : 1°C (For all current models) Not provided: -3°C (For previous special models) Switch for set temperature adjustment in HEAT mode During HEAT operation, warm air collects near the ceiling.
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OC132--2.qxp 1.11.8 10:17 AM Page 50 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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OC132--2.qxp 1.11.8 10:17 AM Page 51 3-5 Defrosting in HEAT mode Defrosting starts. Indoor unit Defrosting stops. ON Indoor fan OFF Auto vane 10 degrees ON OFF Set direction (Remote controller still displays set direction.) Set direction 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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OC132--2.qxp 1.11.8 10:17 AM Page 52 (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.
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OC132--2.qxp 1.11.8 10:17 AM Page 53 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.
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OC132--2.qxp 1.11.8 10:17 AM Page 54 10 TROUBLESHOOTING 1. TROUBLE IN TEST RUN Symptom Cause Check points The display “CENTRALLY CONTROLLED” on remote controller does 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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OC132--2.qxp 1.11.8 10:17 AM Page 55 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. (1) ON the set temperature display part, “CHECK” appears, and the unit address and the check code are displayed alternately at one-second CHECK mode intervals.
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OC132--2.qxp 1.11.8 10:17 AM Page 56 Check Diagnosis of malfunction Cause Check points code EO Signal transmitting/receiving During individual unit control 1) Check the transmission wire. 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.
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OC132--2.qxp 1.11.8 10:17 AM Page 57 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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OC132--2.qxp 1.11.8 10:17 AM Page 58 3-1 Outdoor coil temperature To obtain data on the outdoor coil temperature, add the number of bits of lighting LEDs, and see the graph below to find the temperature. Temperature Short Open Number of bits 3-2 Fan output step To obtain data on the fan output step, add the number of bits of lighting LEDs, and see the graph below to find the fan rotational frequency. 2PUH-2.5NKA, PUH-3NKA PUH2.5VKA, PUH-2.
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OC132--2.qxp 1.11.8 10:17 AM Page 59 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. ● Phase L2 is open. ● Check the power supply. ● Contact of protector, such as ● Check each protector. thermal switch, opened when power was turned on. LD2 Open phase LD3 Outdoor coil thermistor is ● Outdoor coil thermistor is abnormal.
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OC132--2.qxp 1.11.8 10:17 AM Page 60 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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OC132--3.qxp 1.11.8 10:43 AM Page 61 7. OTHER TROUBLES AND CAUSES Vanes do not work. Unit stops after 5 to 20 seconds operation Air discharge display is OFF and air discharge UP/DOWN button does not operate. In this case, remote controller is normal. Power ON/OFF button is not available. Vane motor is damaged. Vane motor relay is damaged. Vane motor does not work. Limit switch does not work. Connector is poorly connected. Vane motor is poorly assembled. Indoor controller board is damaged.
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OC132--3.qxp 1.11.8 10:43 AM Page 62 9. How to check the parts Parts name Check points Disconnect the connector then measure the resistance using a tester. (Surrounding temperature 10:~30:) Room temperature thermistor (RT1) Pipe temperature thermistor (RT2) Relay connector Red 2 White 3 Black Abnormal Open or short Measure the resistance between the terminals using a tester. (Winding temperature 20:) Fan motor (MF) 1 Normal 4.3k"~9.
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OC132--3.qxp 1.11.8 10:44 AM Page 63 11 SYSTEM CONTROL 1. VARIETY OF SYSTEM CONTROL FUNCTIONS 1 Group control with a single remote controller (See page 64.) Unit Unit Many units, installed at different locations, can be started and controlled with a angle 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.
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OC132--3.qxp 1.11.8 10:44 AM Page 64 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.
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OC132--3.qxp 1.11.8 10:44 AM Page 65 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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OC132--3.qxp 1.11.8 10:44 AM Page 66 NOTE1 : Install the relay box where you can be serviced it easily. NOTE2 : For control circuit wiring, use a wire of No. 14 AWG or a control cable according to the power supply of control circuit. NOTE3 : When the power supply of the control circuit is 220/240V AC, ● Do not connect the control circuit wire to the remote controller cable directly. ● Do not place the control circuit wire and the remote controller cable into the same conduit tube.
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OC132--3.qxp 1.11.8 10:44 AM Page 67 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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OC132--3.qxp 1.11.8 10:44 AM Page 68 12 DISASSEMBLY PROCEDURE PKH-3FKA2, PKH-3FKA3 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.
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OC132--3.qxp 1.11.8 10:44 AM Page 69 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 can be serviced. Photo 3 Transformer Capacitor Indoor controller board case Electrical parts box 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.
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OC132--3.qxp 1.11.8 10:44 AM Page 70 OPERATING PROCEDURE PHOTOS 8. Removing the lineflow fan and the fan motor (1) Remove the left and right side panels. (2) Remove the grilles. (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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OC132--3.qxp 1.11.8 10:44 AM Page 71 13 PARTS LIST STRUCTURAL PARTS PKH-2FKA PKH-2FKA1 PKH-2FKA2 PKH-2FKA3 1 11 2 3 10 8 4 2 3 9 4 7 2 5 6 Q'ty / set PKH-2 No. Part No.
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OC132--3.qxp 1.11.8 10:44 AM Page 72 STRUCTURAL PARTS PKH-2.5FKA PKH-3FKA PKH-2.5FKA1 PKH-3FKA1 PKH-2.5FKA2 PKH-3FKA2 PKH-2.5FKA3 PKH-3FKA3 7 8 9 1 2 3 5 6 4 Part number that is circled is not shown in the figure. Q'ty / set No. Part No. Part Name Specification PKH-2.
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OC132--3.qxp 1.11.8 10:44 AM Page 73 STRUCTURAL PARTS PKH-4FKSA PKH-4FKSA1 PKH-4FKSA2 PKH-4FKSA3 7 8 9 1 2 3 5 6 4 Part number that is circled is not shown in the figure. Q'ty / set No. 1 2 3 Part No. Part Name Remarks (Drawing No.
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OC132--3.qxp 1.11.8 10:44 AM Page 75 Part number that is circled is not shown in the figure. Q'ty / set No. Part No. Part Name PKH-2 Specification FKA FKA1 FKA2 FKA3 1 R01 KV5 106 BEARING SUPPORT 1 1 2 R01 KV5 102 BEARING MOUNT 1 1 3 R01 566 103 SLEEVE BEARING 1 1 4 R01 KV5 114 LINEFLOW FAN 1 1 5 R01 KV5 223 VANE MOTOR 1 1 6 R01 KV5 530 NOZZLE ASSEMBLY 1 1 7 R01 KW1 002 LEFT ROTARY VANE 1 1 Remarks (Drawing No.
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OC132--3.qxp 1.11.8 10:44 AM Page 76 ELECTRICAL PARTS PKH-2.5FKA PKH-3FKA PKH-2.5FKA1 PKH-3FKA1 PKH-2.5FKA2 PKH-3FKA2 PKH-2.
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OC132--3.qxp 1.11.8 10:44 AM Page 77 Q'ty / set No. Part No. Part Name Specification PKH-2.5 FKA 9 R01 KV5 527 DRAIN HOSE 10 R01 12G 002 AUTO VANE PKH-3 FKA1 FKA1 FKA3 FKA FKA3 FKA2 FKA2 Remarks (Drawing No.
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OC132--3.qxp 1.11.8 10:44 AM Page 79 Q'ty / set No. Part No. Part Name 10 R01 16G 002 AUTO VANE Remarks (Drawing No.
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OC132--3.qxp 1.11.8 10:44 AM Page 80 14 OPTIONAL PARTS 1. REFRIGERANT PIPES Service Ref. : PKH-2FKA3, PKH-2.5FKA2, PKH-2.5FKA3, PKH-3FKA2, PKH-3FKA3 Part No. PAC-05FFS-E PAC-07FFS-E PAC-10FFS-E PAC-15FFS-E 5m 7m 10m 15m Pipe length Pipe size O.D. Liquid:{9.52 Connection method Indoor unit:Flared Gas:{15.88 Outdoor unit:Flared Service Ref. : PKH-4FKSA2, PKH-4FKSA3 Part No. PAC-SC51PI-E Pipe length PAC-SC52PI-E PAC-SC53PI-E PAC-SC54PI-E 7m 10m 15m 5m Pipe size O.D. Liquid:{9.
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OC132--3.qxp 1.11.8 10:44 AM Page 81 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.
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OC132--3.qxp 1.11.8 10:44 AM Page 82 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. Part No. PAC-805RC 5-1. Dimensions 113 56.3 12 23.
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OC132--3.qxp 1.11.8 10:44 AM Page 83 TERMINAL-BLOCK TERMINAL-BLOCK FOR TRANSMISSION OF POWER SUPPLY Transmission A T N 240 (O) 230 (R) 220 200 E (W) (BR) Tie-wrap (Y) 5A Tie-wrap A N Fuse(5A) TRANSFORMER POWER SUPPLY E Wiring has to be changed when a 200,230 or 240V power is used. (2) Connection method of centralized remote controller and power supply board. 1. Connect the centralized remote controller and power supply board with a non-polar, two-wire cable.
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OC132--3.qxp 1.11.8 10:45 AM Page 84 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. PAC-825AD 6-1.
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OC132--3.qxp 1.11.8 10:45 AM Page 86 HEAD OFFICE : MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI,CHIYODA-KU TOKYO 100-8310, JAPAN © Copyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. Distributed in Nov. 2001. No.OC132 REVISED EDITION-A 700 Issued in Jul. 1997. No.OC132 340 Made in Japan New publication, effective Nov.