Mitsubishi PKH-2.5 Service Manual

TECHNICAL & SERVICE MANUALSPLIT-TYPE, HEAT PUMP AIR CONDITIONERSCONTENTS1. TECHNICAL CHANGE ·············································22. FEATU

10SHF=0.71Does not include booster heater (1.9kW)Total power consumption (kW) Total capacity (x103 Btu/h)30352418123.02.52.01.515 25 35 45 55 65Total

11NOTES : A point on the curve shows the reference point.COOLING CAPACITY HEATING CAPACITYCOOLING CAPACITY HEATING CAPACITY716763716763423630244.03.53

123. CONDENSING PRESSURE AND SUCTION PRESSUREData is based on the condition under indoor humidity 50%.Air flow should be set at HI.A point on the curv

13Data is based on the condition under indoor humidity 50%.Air flow should be set at HI.A point on the curve shows the reference point.Data is based o

14Data is based on the condition under indoor humidity 50%.Air flow should be set at HI.A point on the curve shows the reference point.Data is based o

15Data is based on the condition under indoor humidity 50%.Air flow should be set at HI.A point on the curve shows the reference point.Data is based o

164. STANDARD OPERATION DATAModelsItemElectrical circuitRefrigerant circuitIndoor sideOutdoor sideVoltageFrequencyTotal inputIndoor fan current Booste

17ConditionStandard temperatureMaximum temperatureMinimum temperatureMaximum humidityStandard temperatureMaximum temperatureMinimum temperature8095678

188. NOISE CRITERION CURVES90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC

19OUTLINES AND DIMENSIONS69-1/41-25/329-1/41-25/329-1/4 9-1/41-25/321/213-3/87-3/41-21/322-9/32TopFrontRight sideLeft side55-1/842-15/16 Air intake9-1

21TECHNICAL CHANGE2FEATURES1. COMPACT DESIGNThe PKH series models have been downsized and now require such minimal wall space that they can even be in

2066-5/329-1/453-15/16 Air IntakeFrontKnock out holeRight side9-1/47-3/4Cfor right pipingBAABC4-1/32Liquid pipe 1/2FGas pipeSleeve >< 1><

21Unit : inchRemote controllerFILTERCHECK MODETEST RUNTIMER OFF TIMERCHECK SET TEMP.CLOCK AUTO AUTO START STOPSWINGFANSPEED5-1/84-3/

228WIRING DIAGRAMMODELS PKH18FK3, PKH24FK3, PKH30FK3, PKH36FK3 WIRING DIAGRAMGRL1L2POWER SUPPLY~(1PHASE)AC208/230V 60HzGROUND3NOTES:1.Since the indoo

23OPERATION FLOW-CHART9STARTPower circuitbreakerCheck SWON twiceOperation SWON“OFF” timer“ON” timerSTOPSet timecompleteSet timecomplete1NONONONONONONO

24COOL operationFour-way valve/OFFInitialCOOLINGNONONONONOYESYESYESYESYESYESNOYESYESYESYESYESYESYESYESYESYESYESNONONONOYESNONONONONONONONONOw 8w 9Vane

25w8—9 Refer to page OC273-24.w12 When room temperature is 64°F or below, the compressor cannot operate.When room temperature rises over 64°F the comp

26Heat operationinitialHEATINGVane setting notchVane initial settingdefrostingHeating areaDefrost releaseDefrost30 min. elapseOutdoor unit troubleFour

27MICROPROCESSOR CONTROL10● Compressor andoutdoor fan : ON-OFF● Operation modechange :COOL-HEAT.1. OUTLINE OF MICROPROCESSOR CONTROL● OFF-ON switching

28Minimum 3 minutes 1ONThermostatIndoor fanAuto vaneBooster heaterCompressorONLOW or HIGHInitially 10°(Changeable by remote controller setting)LOW

29(1) Compressor control1 3-minute time delayTo prevent overload, the compressor will not start within 3 minutes after stop. 2 The compressor runs whe

34. ADVANCED MICROPROCESSOR(1) Easy to Use Microprocessor1) Ultra-Thin Remote ControllerThe streamlined, wide controller is designed toblend with any

30(3) Auto vane controlAuto vane position is set to 10 degrees airflow at the start-up of COOL operation. It can then be changed by the remotecontroll

31(4) Detecting abnormalities in the outdoor unitAfter the compressor has been continuously operated for 3 minutes, if the difference between the indo

32<DRY operation time chart>Minimum 3 minutes w1ONThermostatIndoor fanAuto vaneBooster heaterCompressorONDRY MODEDRY MODEONONOFFOFFONOFFOFFOFFOF

33(1) Compressor control1 3-minute time delayTo prevent overload, the compressor will not start within 3 minutes after stop. 2 The compressor runs whe

342-3 HEAT operationMinimum 3 minutes w2ONThermostatIndoor fanAuto vaneBooster heaterCompressorPower ON lampSTAND BY lampONONLOW or HIGHLOW or HI

35(1) Compressor control13-minute time delayTo prevent overload, the compressor will not start within 3 minutes after stop.2The compressor runs when t

36(3) Auto vane controlAuto vane position is set to 70 degrees airflow at the start-up of HEAT operation.(a) Vane position set mode & swing mode.(

37(6) Indoor coil temperature abnormality detectionAn abnormality can be detected during compressor ON, except for the following.●For the first 30 min

382-4 AUTO operation (Automatic COOL/HEAT change over operation)(1) Initial mode1 When AUTO operation starts after unit OFF.● If the room temperature

39<How to operate>To change the air flow direction, press AIR DISCHARGE button.(1) COOL/DRY operationAt the start-up of COOL or DRY operation, t

46. HIGH RELIABILITY AND EASY SERVICINGIn addition to the self-diagnostic function, units are also equipped with a 3-minute time delay mechanism (cool

40<Timer function>AUTO STOP ·········The air conditioner stops after the set time lapses.AUTO START ········The air conditioner starts after the

41(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

422-9 Dip switch functionsEach figure shows the initial factory setting.(1). On remote controller board1. SW17(Address selector)SW17-1~6) For address

432-10 INDOOR FAN CONTROLIndoor fan relay output.(a) During fan ONThe indoor fan relay turns ON. One second later, the phase control will start.(b) Du

4411TROUBLESHOOTINGThe display “CENTRALLYCONTROLLED” on remotecontroller does not disap-pear.1) Wrong address setting of remote con-troller/indoor con

452-2 How to use the self diagnostic function for serviceA. For normal control with one unit and one remote controller(1) Pressing the CHECK button on

461) Check the indoor/outdoor connecting wire.2) Change the connection of electric wiring.3) Check the protection device.4) Measure the resistance of

473. WRONG WIRING ON SITE3-1 Between remote controller and indoor unitIf the wire is disconnected between the remote controller and the indoor unit, n

48Vanes do not work.Vane motor does not work.Connector is poorly connected.Vane motor is poorly assembled.Indoor controller board is damaged.Unit stop

495. HOW TO CHECK THE PARTSRoom temperaturethermistor (RT1)Pipe temperaturethermistor (RT2)Fan motor (MF)Disconnect the connector, then

5PART NAMES AND FUNCTIONS3Remote controller operation buttonsTIMER OFF TIMERCHECK SET TEMP.DRY COOLAUTO HEATCLOCK AUTO AUTO

5012SYSTEM CONTROL1. VARIETY OF SYSTEM CONTROL FUNCTIONSUnitRemote controldisplay boardRemotecontrollerUnit UnitTwo remote controllers can be used to

512. GROUP CONTROL WITH A SINGLE REMOTE CONTROLLERA maximum of 50 units can be started in order according to the dip switch settings 2-1 How to wire(1

523. CONTROL USING TWO REMOTE CONTROLLERSTwo remote controllers can be used to control either one unit or a group of units. Units operate according to

53NOTE1 : Install the relay box where it can be serviced easily.NOTE2 : For control circuit wiring, use a wire of No. 14 AWG or a control cable accord

546. MULTIPLE REMOTE CONTROL DISPLAYYou can control several units with a multiple remote control display, bywiring an optional multiple display adapte

55DISASSEMBLY PROCEDURE13OPERATING PROCEDURE PHOTOS&ILLUSTRATIONMetal fixtureScrews1. Removing the lower side of the indoor unit from the instal-l

56OPERATING PROCEDURE PHOTOS&ILLUSTRATION(8) Remove the screws of the indoor controller board case,and pull out the indoor controller board case.

57OPERATING PROCEDURE PHOTOS8. Removing the line flow fan and the fan motor(1) Remove the left and right side panels. (2) Remove the grilles. (3) Remo

5814 PARTS LISTNo.Parts No. Parts NameIncluding Restrictor valve • Capillary tube Including Restrictor valve • Capillary tubeIncluding Restrictor

59No.Parts No. Parts Name SpecificationsRemarks(Drawing No.)WiringDiagramSymbolQ'ty / setPKH6789101112131415161718192021222324252627282930313233D

6TIMER OFF TIMERCHECK SET TEMP.DRY COOLAUTO HEATCLOCK AUTO AUTO START STOPMODE TIMER ON/OFF CLOCK/TIMER FAN SPEED AIR D

60No.Parts No. Parts Name SpecificationsRemarks(Drawing No.)WiringDiagramSymbolQ'ty / setPKHPart numbers that is circled is not shown in the figu

61OPTIONAL PARTS151-2 Feature of program timer(1) Daily timer functionDaily timer can be set in 30 minutes units for up to 24 hours.Each unit can be s

621-4 Names and functions<PAC-SC32PTA>WEEKLY TIMER SETTING DISPLAYSets timer for a week.SET/MONITORSETSMTWT F SMONITORPROGRAM TIMERPAC-SC32PTATO

OC273-A-3.qxp 03.11.25 9:02 AM Page 63

TMcCopyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.Distributed in Nov. 2003 No.OC273 REVISED EDITON-A PDF 9Distributed in Dec. 2001 No.OC273Ne

3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 Toll Free: 800-433-4822 ● Toll Free Fax: 800-889-9904 www.mrslim.com Specifications ar

7SPECIFICATIONS448 -41CapacityMoisture removalPowerConsumptionEERSEERHSPFCOPINDOOR UNIT MODELSExternal finishPower supplyMax.fuse size (time delay)Min

85DATAModelsModels Outdoor intake air DB temperature(˚F)PKH18FK371676362.5605971676362.5605971676362.5605971676362.56059TC21.019.518.218.117.216.827.9

9ModelsModels Outdoor intake air WB temperature(˚F)PKH18FK3757065757065757065757065CA12.112.412.716.316.617.021.521.922.524.725.325.9PC1.201.161.111.8