Mitsubishi Mr.Slim PCH-GAK Manuel de service

TECHNICAL & SERVICE MANUALSPLIT-TYPE,HEAT PUMP AIR CONDITIONERSCONTENTS1. FEATURES ···········································32. PART NAMES AND F

10Rating Conditions (JIS B8616)Service Ref.Power supplyExternal finishHeat exchangerBooster heaterOperation control & ThermostatNoise level(Low-Hi

114DATA1. PERFORMANCE DATA1) COOLING CAPACITY544858006157651770627519798184487566805685519052100881074111402120691251013319141381496514628155751653217

122. HEATING CAPACITYService Ref. PCH-2GKHA1 PCH-2.5GKHA1 PCH-3GKHA1 PCH-4GKHSA1 PCH-5GKHSA1 PCH-6GKHSA1152025152025152025152025152025152025CA-10 -5 0

133. ELECTRICAL DATARating Conditions (JIS B8616)Indoor……220V 50Hz 1phaseOutdoor… 220V 50Hz 1phase / 380V 50Hz 3phaseIndoorOutdoorInput (kW)Current (A

144. STANDARD OPERATION DATARating Conditions (JIS B8616)Electrical circuit Total Refrigerant circuitIndoor sideOutdoor sideCapacityInput Indoor unit

1551. INDOOR UNITPCH-2GKHA11802101571585182 (3/8F) liquid201 (5/8F) gas241 (Drainage)Air intake918254680Electrical box2267052592835226

16PCH-2.5GKHA1PCH-3GKHA11240 (suspension bolt pitch)140150320 80177061290121421018081 761310Air outlet1228680254Air intake8518220124115157(3/8F liquid

171228680254Air intake121427020781 961310Air outlet1240 (suspension bolt pitch)140150320 80177068718224516217(3/8F liquid)(5/8F-gas)(Drainage) 328514E

181535680254Air intake152427020781 961620Air outlet1547(suspension bolt pitch)140150320 80187068718219824516217(3/8F liquid)(3/4F gas)(Drainage) 32851

192. REMOTE CONTROLLER Unit : mm(inch)18130Rear side wiring arrangement opening.120FILTERCHECK MODETEST RUNFILTERCHECK MODETEST RUN4683.5SW18SW17CAUTI

20WIRING DIAGRAM6PCH-2GKHA1/PCH-2.5GKHA1/PCH-3GKHA1PCH-4GKHSA1/PCH-5GKHSA1/PCH-6GKHSA1240V230V220V230V220VYELLOWORANGERED1ONOFF23 41ONOFF23 4[Emergenc

217REFRIGERANT SYSTEM DIAGRAMIndoor unitIndoor heat exchangerRefrigerant pipe(option)15.88mm( 5/8")(with heat insulator)Flexible tubeBall val

22OPERATION FLOW-CHART8STARTPower circuitbreakerCheck SWON twiceOperation SWON“OFF” timer“ON” timerSTOPSet timecompleteSet timecomplete1NONONO NONONON

23COOL operationFour-way valve/OFFInitialCOOLINGNONONONONONOYESYESYESYESYESYESNOYESYESYESYESYESYESYESYESYESYESYESNONONONOYESNONONONONONONONONOw8w9Vane

24Heat operationInitialHEATINGVane setting notchVane initial settingDefrostingHeating areaDefrost releaseDefrost30 min. elapseOutdoor unit troubleFour

25w8—9 Refer to page 31~32.w12 When room temperature is 18°C or below, the compressor cannot operate.When room temperature rises over 18°C, the compre

26MICROPROCESSOR CONTROL9● Compressor andoutdoor fan : ON-OFF● Operation modechange :COOL-HEAT.1.OUTLINE OF MICROPROCESSOR CONTROL● OFF-ON switching.●

272. INDOOR UNIT CONTROL2-1COOL operation(1) Compressor control1 3-minute time delayTo prevent overload, the compressor will not start within 3 minute

285 Coil frost protectionWhen indoor coil temperatuer becomes -15°C or below,coil frost protection will proceed as follows.<Start condition>Afte

29(3) Auto vane controlAuto vane position is set to horizontal airflow at the start-up of COOL operation. It can then be changed by the remotecontroll

3● Operation buttons● Once the operation of the unit is set, subsequent operation canonly be performed by pressing the ON/OFF button repeatedly.FILTER

30<Auto vane drive> (a) The auto vane is driven by DC12V motor.(b) Airflow direction is selected depends on the number of pulse were sended.(c)

31<DRY operation time chart>ONThermostatIndoor fanAuto vaneDrain pump(OPTIONAL)CompressorONONLow speedLOW speedONOFFOFF3 minutesOFFOFFBooster he

324The compressor will not start when the room temperature is below 18:.The compressor start intermittent operation when the power is turned ON with r

33<HEAT operation time chart>ONThermostatIndoor fanAuto vaneDrain pump(OPTINAL)CompressorONONLOW or HIGHLOW or HIGHONOFFOFFOFFOFFOFFPower ON lam

34(1) Compressor control13-minute time delayTo prevent overload, the compressor will not start within 3 minutes after stop. 2The compressor runs when

35(3) Auto vane control(a) STOP mode (fixed operation)( i ) The airflow direction at the start-up of HEAT operation is the same as that of the previo

36(6) Indoor coil thermistor abnormality detectionAn abnormality can be detected during compressor ON, except for the following.●For the first 30 minu

372-4 AUTO operation (Automatic COOL/HEAT change over operation)(1) Initial mode1 When AUTO operation starts after unit OFF.● If the room temperature

38<How to operate>To change the air flow direction, press button.NOTE: Vane angle can be change to upper angle by cutting off the J5-3.(Jamp

39FILTERCHECK MODETEST RUN4<Timer function>AUTO STOP ·········The air conditioner stops after the set time lapses.AUTO START ········The air con

4Caution● Only the display lights when the unit is stopped and power supplied to the unit.● When power is turned ON for the first time the (CENTRA

40(1) Indoor coil temperature codeDuring the test run, the indoor coil temperature code from 1 to 15 is displayed on the remote controller instead of

412-9 Interlock with ventilation system (LOSSNAY)Mr. SLIM/LOSSNAY interlock operation is available by using the optional parts listed below.(1) System

422-10 Dip switch functionsEach figure shows the initial factory setting.1 On remote controller board(1) SW17(Address selector)SW17-1~6) For address s

43(2) SW2 (Address selector) Used insetting the unit-address for group control.For further information, refer to page 40

442-11 INDOOR FAN CONTROLEach figure shows the initial factory setting.(1) Fan motor max. rotational frequncy for PCH-GKHA(2) Indoor fan relay output(

4510 minutes 1ONThermostatOutdoor fan4-way valve(COOL)4-way valve(HEAT)Bypass valveCompressorCrankcase heater(with jumper wire J3)Crankcase heater

46(1) Start conditions A. When all of the following conditions are satisfied, defrosting will start. However, when the bypass valve turns OFF,defrosti

47(3) Defrost intervalThe defrost interval time is determined as follows.● Initial defrost interval is 50 minutes.● The defrost interval after defrost

483-7 Service functions(1) Compulsory defrositng1When all of the following conditions are satisfied, pressing SW2 starts the compulsory defrosting.● D

4910TROUBLESHOOTINGSymptom Cause Check pointsThe display “CENTRALLYCONTROLLED” on remotecontroller dose notdisappear.1) Wrong address setting of remot

51. AIR OUTLETNew PCH series models have 1 air outlet (auto vane switching of horizontal air flow / down flow by switched by auto vane)instead of 2 (h

502. SELF DIAGNOSTIC FUNCTION WITH REMOTE CONTROLLER2-1 When malfunction occurs during operationWhen a malfunction occurs, the indoor and outdoor unit

51CheckcodeDiagnosis of malfunction Cause Check pointsEO Signal transmitting/receivingerror(Indoor controller does notrespond to remote controllersign

523. SERVICE DATA INDICATION BY SWITCHES ON OUTDOOR CONTROLLER BOARDSetting dip switchs SW2 and SW3 on the outdoor controller board enables LED to sho

533-1 Outdoor coil temperatureTo obtain data on the outdoor coil temperature, add the number of bits of lighting LEDs, and see the graph below to find

54BlinkingLEDDiagnosis of malfunction Cause Check pointLD1 Reversed phase Phases L1, L2, and L3areconnected improperly.Check the power supply connecti

556. WRONG WIRING ON SITE6-1 Between remote controller and indoor unitIf the wire is disconnected between the remote controller and the indoor unit, n

56LOSSNAY control switch does not work.LOSSNAY control switch can not work during interlockoperation.LOSSNAY control switch is effective only while Mr

1. Removing the air intake grill (1) Slide the intake grill holding knobs (at two locations)backward to open the intake grill.(2) When the intake gri

58Figure 2OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS3. Removing the fan motor (1) Remove the intake grill.(2) Disconnect the fan motor connector.(3

59OPERATING PROCEDURE PHOTOS6. Removing the vane motor (1) Remove the air intake grill.(2) Remove the left side panel.(3) Remove the relay connector

66. QUITENESS ; 43dB (HIGH NOTCH)New PCH series has No.1 quietness by changing the air course and the adapting the new shape air outlet.7. EASY MAINTE

60OPERATING PROCEDURE PHOTOS9. Removing the drain pan (option)(1) Remove the air intake grill.(2) Remove the beam.(3) Remove the side panel (right an

61OPERATING PROCEDURE PHOTOS13. Removing the heat exchanger. (1) Remove the air intake grill.(2) Remove the beam.(3) Remove the side panel (right and

7PART NAMES AND FUNCTION2● Indoor (Main) UnitAir outletIntake grilleAir intakeLeft/right guide vanesChange the direction of airflowfrom the horizontal

Service Ref.Power supplyExternal finishHeat exchangerBooster heaterOperation control & ThermostatNoise level(Low-High)Cond. drain connection O.D.D

9Rating Conditions (JIS B8616)Service Ref.Power supplyExternal finishHeat exchangerBooster heaterOperation control & ThermostatNoise level(Low-Hig