Mitsubishi Electric PCA-A30KA Service Manual

SERVICE MANUALSPLIT-TYPE, HEAT PUMP AIR CONDITIONERSSPLIT-TYPE, AIR CONDITIONERSNo. OCH455INDOOR UNITREMOTE CONTROLLER CONTENTS 1. REFERENCE MANUAL.

10PCA-A36KA PCA-A42KA Unit: inch (mm)When drain socket is installed9-3/16(233)When drain socket is installedDrainage9-11/16(246)14NOTES.1.Use M10

11WIRING DIAGRAM7PCA-A24KA PCA-A30KA PCA-A36KA PCA-A42KASYMBOL SYMBOLNAME NAMEI.BR.BINDOOR CONTROLLER BOARDFUSE (T6.3AL250V)VARISTORSURGE ABS

12Pipe temperature thermistor/liquid(TH2)Distributorwith strainer 1/2#50/#50Condenser/evaporatortemperature thermistor(TH5)Room temperature thermistor

13<Error code display by self-diagnosis and actions to be taken for service (summary)>Present and past error codes are logged and displayed on t

14[Procedure]1. Press the CHECK button twice.2. Press the temperaturebuttons.3. Point the remote controller at thesensor on the indoor unit andpress t

15[Output pattern A] Errors detected by indoor unit[Output pattern B]E9*1 If the beeper does not sound again after the initial2 beeps to confirm the s

16•If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.SymptomCauseWired remote controller

179-3. SELF-DIAGNOSIS ACTION TABLENote: Refer to the manual of outdoor unit for the details of display such as F, U, and other E.Error CodeAbn

18Error CodeAbnormal point and detection methodCauseCountermeasureP6Freezing/overheating protection is work-ingFreezing protection (Cooling mode)The u

19Error CodeAbnormal point and detection methodCauseCountermeasureP9Pipe temperature thermistor/Condenser-Evaporator (TH5)The unit is in 3-minute resu

21-1. OUTDOOR UNIT’S SERVICE MANUAL1-2. TECHNICAL DATA BOOKREFERENCE MANUAL1Series (Outdoor unit) Manual No.PUZ-A•NHA3(-BS) PUY-A•NHA3(-BS) OCS14PUZ-

20E6Contact failure, short circuit or,miswiring (converse wiring) ofindoor/outdoor unit connectingwireDefective transmitting receivingcircuit of outdo

21 (For the separate indoor/outdoor unit power sup-ply system)Power supply of 208/230V AC is not supplied toindoor unit.The connectors of the option

22Note: Refer to the manual of outdoor unit for the detail of remote controller.(3)Upward/downward vane performance failureThe vane is not do

239-5. EMERGENCY OPERATION9-5-1. When wireless remote controller fails or its battery is exhausted9-5-2. When wired remote controller or indoor unit m

249-6. HOW TO CHECK THE PARTSPCA-A24KA PCA-A30KA PCA-A36KA PCA-A42KAParts name Check pointsDisconnect the connector then measure the resistance usin

259-6-1. Thermistor<Thermistor Characteristic graph>Room temperature thermistor (TH1)Pipe temperature thermistor/liquid (TH2)Condenser/evaporato

269-7. TEST POINT DIAGRAMIndoor controller boardPCA-A24KA PCA-A30KA PCA-A36KA PCA-A42KACN3CTransmission(Indoor/outdoor)(0~24V DC)SW2Capacity setting

27SW1Setting by the dip switch and jumper wireFunctionsJumper wireModelsettingsCapacitysettingsPair numbersetting withwirelessremotecontrollerFor serv

2828SPECIAL FUNCTION10Note:· When the uint is restarted to operate after turning off the power or OFF operation, the unit which was operating will sta

2929 System constraint· This function is available only in cooling mode.Ex.) Set temp. by R/C = 20:(68°F)Set point = 26:(79°F)When request code number

3SAFETY PRECAUTION2Cautions for units utilising refrigerant R410A2-2. CAUTIONS RELATED TO NEW REFRIGERANTUse new refrigerant pipes.Make sure that the

30(2) Setting method of each function by wired remote controllerB: Refrigerant addressC: Data display areaD: Request code display areaTESTCHECKFILTER

31Photo 2DISASSEMBLY PROCEDURE11PCA-A24KA PCA-A30KA PCA-A36KA PCA-A42KA Be careful when removing heavy parts.(Photo: PCA-A36KA)OPERATING PROCEDUREPH

32OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS3. Removing the room temperature thermistor (TH1) (1) Remove the air intake grille. (See Figure 1,2) (2

33OPERATING PROCEDUREPHOTOS & ILLUSTRATIONSScrewSide panel (Right)Side panel (Left)Sliding the panelto the frontFigure 36. Removing the side pan

34OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS8. Removing the under panel(1) Remove the air intake grille. (See Figure 1,2) (2) Remove the left and r

35OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS10. Removing the thermistors/Liquid pipe (TH2) and con-denser/evaporator (TH5)(1) Remove the air intake

OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS13. Removing the heat exchanger (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the beam.

4[3] Service tools Use the below service tools as exclusive tools for R407C refrigerant.GravimeterUnit No. Tool name Specifications 1 Gauge ma

5°F°C°F°CERROR CODEAFTERTIMERTIME SUN MON TUE WED THU FRI SATONOFFHrAFTERFILTERFUNCTIONONLY1Hr.WEEKLYSIMPLEAUTO OFFPAR-21MAAON/OFFFILTERCHECKOPERATION

66SPECIFICATIONS44-1. SPECIFICATIONSAAkWF.L.Am3/min(CFM)Pa(mmAq)dBmm(in.)mm(in.)mm(in.)mm(in.)kg(lbs)Service Ref.Power supply(phase, cycle, voltage)Ma

771 phase, 60Hz, 208/230V152White Munsell 6.4Y 8.9/0.4Plate fin coilSirocco fan (direct) % 40.1600.97Dry: 23-25-27-29(810-885-955-1025)Wet: 21-23-25-2

8NOISE CRITERION CURVES5NOTCHHighMedium1Medium2LowSPL(dB)40373533LINE90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARIN

9OUTLINES AND DIMENTIONS6PCA-A24KA PCA-A30KA Unit: inch (mm)When drain socket is installed9-3/16(233)DrainageWhen drain socket is installed9-11/16(24