Mitsubishi PEH-3EAKH Service Manual

TECHNICAL & SERVICE MANUALSPLIT-TYPE, HEAT PUMP AIR CONDITIONERSCONTENTS1. FEATURES ···········································22. PART NAMES AND

10Heating1.41.21.00.80.61.41.21.00.80.60.4-12-10 -5 0 5 10 15OUTDOOR W.B.(°C)INDOOR D.B. (°C)INDOOR D.B. (°C)152025252015TOTAL INPUT (RATIO) CAPACITY

11Air flow (CMM)Recommended range20015010050HiLo02015 17 25 30 35External static pressure(Pa)(1Pa = 0.1mmAq)Fan PerformanceAir flow (CMM)Recommended

12Service Ref.Indoor unitOutdoor unitIndoor unitOutdoor unitModeCapacity (W)Total Input (kW)Input (kW)Current (A)Starting current (A)Input (kW)

13VAVAService Ref.TotalElectrical circuitElectrical circuitIndoor sideOutdoor sideWkWMPa·G(Of/F·G)MPa·G(Of/F·G):::mD.B.:W.B.:D.B.:D.B.:W.B.:Mode

141. INDOOR UNITSPEH-2.5EKHA2.THPEH-3EKHA2.TH1111105 35704450845725.5505975(3)352861713.2(2 3/8)60 265(10 1/2) 40 155 155 15520(13/16)10(3/8)600(24)10

15PEH-4EKHSA2.TH11903542.520980(38 9 16)(13/16)942(37 1 16)(3 9/16)795(31 5 16)345(13 5/8)451236711✕65(=715)7✕65(=455)70 404065 65 65 65 65 65 65 6

16PEH-5EKHSA2.TH1111903542.5201180(46 7 16)(13/16)1142(44 15 16)(3 9 16)995(39 3 16)14✕65(=910)4✕65(=260)3✕65(=195)13✕65(=855)345(13 5/8)451236770

17Unit : mm (inch)2. REMOTE CONTROLLER18130Rear side wiring arrangement opening.120FILTERCHECK MODETEST RUNFILTERCHECK MODETEST RUN4683.5SW18SW17CAUTI

18PEH-2.5/3/4/5EKH(S)A2.TH1. Since the indoor transformer (T) is connected with 240V power, if 220, 230V power is used. Change the wiring connection s

19PEH-2.5EKHA2.TH/PUH-2.5 VKA2(.UK)PEH-3EKHA2.TH/PUH-3 VKA2(.UK) PUH-3 YKA2(.UK)Outdoor unitOutdoor unitOutdoor unitIndoor

21FEATURESIndoor unitCeiling ConcealedSeries PEHRemote controllerFILTERCHECK MODETEST RUNOutdoor unit1. TOTALLY INVISIBLE INDOOR UNIT BEHIND THE CEILI

20 STARTPower circuit breakerCheck SW ON twiceOperation SW ON“OFF” timer“ON” timerSTOPSet time completeSet time complete1 NO NO

21 COOL operationFour-way valve/OFFNONOYESYESNOYESYESYESYESYESYESYESYESYESYESYESNONONONOYESNONONONONONONONONOCompressor thermostatONAllowance ca

22w11 Refer to page 26~27.w12 When room temperature is 18: or below, the compressor cannot operate.When room temperature rises over 18:, the compresso

23Heat operationDefrpstingHeating areaDefrost releaseDefrost 30 min. elapseOutdoor unit troubleFour-way valve ONHor adjust in processCompressor

24● Compressor andoutdoor fan : ON-OFF● Operation modechange :COOL-HEAT.1.OUTLINE OF MICROPROCESSOR CONTROL● OFF-ON switching.● COOL/DRY-AUTO-HEAT sel

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

26<DRY operation time chart>Minimum 3 minutes w1ONThermostatIndoor fanBooster heaterCompressorONLow speedLOW speedONONOFFOFFOFFOFFOFFOperation s

274The compressor will not start when the room temperature is below 18°C.The compressor starts intermittent operation when the power is turned ON with

282-3 HEAT operationMinimum 3 minutes w2ONThermostatIndoor fanBooster heaterCompressorONLOW or HIGHLOW or HIGHONOFFOFFOFFONOFFExtra LOW w1Extra LO

29(1) Compressor control13-minute time delayTo prevent overload, the compressor will not start within 3, minutes after stop.2The compressor runs when

3PART NAMES AND FUNCTIONS2● Indoor (Main) UnitAir intake duct flangeAir outlet duct flangeAir outletAir intake(sucks the air inside the room into the

30(5) Indoor coil thermistor abnormality detectionAn abnormality can be detected during compressor ON, except for the following.●For the first 20 minu

312-4 AUTO operation (Automatic COOL/HEAT change over operation)(1) Initial mode1 When AUTO operation starts after unit OFF.● If the room temperature

32FILTERCHECK MODETEST RUN<Timer function>AUTO STOP ·········The air conditioner stops after the set time lapses.AUTO START ········The air cond

33(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

342-9 Interlock with ventilation system (LOSSNAY)Mr. SLIM/LOSSNAY interlock operation is available by using the optional parts listed below.(1) System

2-10 Dip switch functionsEach figure shows the initial factory setting.1 On remote controller board(1) SW17(Address selector)SW17-1~6) For address set

36SW2-1SW2-2SW2-3SW2-4SW2-5SW2-6OFF000000ON2 0 (1)2 1 (2)2 2 (4)2 3 (8)2 4 (16)2 5 (32)(2) SW2 (Address selector)1 2 3 4 5 6ONOFFUsed in setting the u

3710 minutesw1ONThermostatOutdoor fan4-way valve(COOL)4-way valve(HEAT)Bypass valveCompressorCrankcase heater(with jumper wire J3)Crankcase heat

38(1) Start conditions A. When all of the following conditions are satisfied, defrosting will start. However, when the bypass valve turns OFF,defrosti

39(3) Defrost intervalThe defrost interval time is determined as follows.● Initial defrost interval is 50 minutes.● The defrost interval after defrost

4● Remote controller● Operation buttons● Once the operation of the unit isset, subsequent operations canonly be performed by pressingthe ON/OFF button

403-7 Service functions(1) Compulsory defrosting1When all of the following conditions are satisfied, pressing SW2 starts the compulsory defrosting.● D

41Symptom Cause Check pointsThe display “CENTRALLYCONTROLLED” on remotecontroller dose not disap-pear.1) Wrong address setting of remote con-troller/i

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

43CheckcodeDiagnosis of malfunction Cause Check pointsEO Signal transmitting/receivingerror(Indoor controller does notrespond to remote controllersign

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

453-1 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

46BlinkingLEDDiagnosis of malfunction Cause Check pointLD1 Reversed phase Phases A1, A2, and A3are con-nected improperly.Check the power supply connec

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

48LOSSNAY control switch does not work.LOSSNAY control switch can not work during interlock opera-tion.LOSSNAY control switch is effective only while

492. Removing the electrical parts(1) Remove the 2 screws and the electrical parts cover.(See Photo 2.)● Indoor controller board● Transformer● Run cap

5FILTERCHECK MODETEST RUN050Caution● Only the display lights when the unit is stopped and power supplied to the unit.● When power is turned ON for th

504. Removing the fanNote : Perform the following with the indoor unit lowereddown to the floor.(1) Remove the drain pan. (See Photo 1.)(2) Disconne

51PARTS LIST12No.Part No.Part nameSpecificationRemarksUnitAmountWiringDiagramSymbolRecom-mendedQ'tyQ'ty/setPEH-2.5 PEH-3Price123456

52No.Part No.Part nameSpecificationRemarks(Drawing No.)UnitAmountWiringDiagramSymbolRecom-mendedQ'tyQ'ty/setPEH-4Price1234567891011121314151

53No.Part No.Part nameSpecificationRemarks(Drawing No.)UnitAmountWiringDiagramSymbolRecom-mendedQ'tyQ'ty/setPEH-5Price1234567891011121314151

54ELECTRICAL PARTSPEH-2.5EKHA1.TH/PEH-2.5EKHA2.THPEH-3EKHA1.TH/PEH-3EKHA2.THPEH-4EKHSA1.TH/PEH-4EKHSA2.THPEH-5EKHSA1.TH/PEH-5EKHSA2.THNo.Part No.Part

55OPTIONAL PARTS131. REFRIGERANT PIPESService Ref. : PEH-2.5EKHA2.TH,PEH-3EKHA2.THService Ref .: PEH-4EKHSA2.TH,PEH-5EKHSA2.TH2-2 Feature of program t

56SET/MONITORSETSMTWT F SMONITORPROERAN TIMERPAC-SC32PTATODAYONWEEKLYSETTINGOFFONSET BACKOFFCLOCK DAILY TIMERSET BACKSET BACKDAILYSETTING12 15

57"ENGAGED" indicatorWhen this indicator is lit, transmission is inprogress and all switches are inoperative.DUAL/CENTRAL switchThis change-

585-3 Connection method! Connections in the power supply cord.1. Connect the power supply cord to the power supply terminal-block and fix it in-place

596. PROGRAM TIMER ADAPTERThis adapter is needed when a program timer(PAC-SK65PT)or a centralized remote controller(PAC-805RC)is used.6-2 Connection m

63 SPECIFICATIONSw1 Rating condition <JIS B 8616>(INDOOR) Cooling : 27: D.B.,19:W.B. Heating : 20: D.B.(OUTDOOR) Cooling : 35: D.B.

HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYOIssued in Sep. 1997. NO. OC153 560Printed in Japan© Copyright 199

7PEH-4EKHSA2.TH PEH-5EKHSA2.THCooling33,1009,7003.64Heating Cooling42,30012,4004.860.441.872.600.2427-34(950-1200)(2.4)1055<41-1/2>

84DATA1 PERFORMANCE DATA1) COOLING CAPACITYNote CA : Capacity (W)P.C. : Power consumption (kW)Cooling capacity correction factorsP.C.CA6,4576,8757,2

92) HEATING CAPACITYNote CA :Capacity (W)P.C. :Power consumption (kW)Heating capacity correction factorsP.C.CA4,5884,3934,2225,6845,4435,2307,12