Mitsubishi PUHZ-W90VHA Service Manual

SERVICE MANUALAIR TO WATER HEAT PUMPNo. OCH419 CONTENTS 1. SAFETY PRECAUTION...2 2. SPECIFICATIONS...

10REFRIGERANT SYSTEM DIAGRAM7DistributorTH7Strainer(#100) Strainer(#100)ReceiverLEV-BTH6TH32Plate HEXWater INWater OUTStrainer(#100)TH3CHECK/VCHECK/VC

11TROUBLESHOOTING8Unit conditions at serviceError codeActions to be taken for service (summary)The trouble is reoccurring.DisplayedNot displayedJudge

128-3. SELF-DIAGNOSIS ACTION TABLE<Abnormalities detected when the power is turned on>Error CodeAbnormal point and detection method CaseJudgment

13<Abnormalities detected while unit is operating>Error CodeAbnormal point and detection method Judgment and actionU1High pressure (High-pressur

14ThermistorsOpen detection Short detectionSymbolNameTH3TH6TH7TH8– 40 or below– 40 or below– 40 or below– 40 or below– 35 or below90 or above90

15Error CodeAbnormal point and detection method CaseJudgment and actionU7Too low superheat due to low discharge temperatureAbnormal if discharge super

16Error CodeAbnormal point and detection method Judgment and actionCaseUHCurrent sensor error or input current error·Abnormal if current sensor detect

17Error CodeAbnormal point and detection method Judgment and actionCaseP6Freezing/overheating protection is working(1)Freezing protection <Cooling

18Error CodeAbnormal point and detection method Judgment and actionCasePEInlet water temperatureAbnormal if the following conditions aredetected for c

198-4. HOW TO CHECK THE PARTS PUHZ-W90VHA123456MParts nameCheck pointsDisconnect the connector then measure the resistance using a tester. (At t

2SAFETY PRECAUTION1Cautions for units utilizing refrigerant R410A1-2. CAUTIONS RELATED TO NEW REFRIGERANT1-1. ALWAYS OBSERVE FOR SAFETYBefore obtainin

20Notes · High voltage is applied to the connector (CNF1) for the fan motor. Give attention to the service. · Do not pull out the connector (CNF1) of

218-5. HOW TO CHECK THE COMPONENTS<Thermistor feature chart>Low temperature thermistors• Thermistor <Liquid pipe> (TH3)• Thermistor <Pl

22Low temperature thermistor• Thermistor <Inlet water> (TH32) 0 15k10 9.6k20 6.3k25 5.1k30 4.2k40 2.9kThermistor R0 = 15k ± 2.5%B

23<Output pulse signal and the valve operation>(2) Linear expansion valve operationOpenExtra tightning (about 32 pulse)Pulse number500 pulseO

24Main bodyLead wireStopperCoil(3) How to attach and detach the coil of linear expansion valve<Composition>Linear expansion valve is separable i

258-6. TEST POINT DIAGRAMOutdoor controller circuit boardCNSNot usedCNAC to : Power supplyfor outdoor controller circuit board(220V-240V AC) to :

26CNAC1, CNAC2220-240V ACConnect to the out-door controller cir-cuit board (CNAC).EIConnect to the earth.LI, NIVoltage of 220-240V AC is input. Connec

27Outdoor power circuit boardTABP1Connect toACTM+TABP2Connect to the ACTMCN4Connect to the outdoor controller circuit board (CN4)CN2Connect to the out

28Interface circuit boardCNIF3Input signalConnect to theterminal block(TB2, TB3)CNIF1Connect to the outdoor controller circuit boardCNIF2Connect to th

29Active filter module(ACTM)—Connect to the outdoor power circuit board (TABN1)L1, L2Connect to the DCL (Reactor)+Connect to the outdoor power circuit

331-3. CAUTIONS FOR REFRIGERANT PIPING WORKTools for R410A (The following table shows whether conventional tools can be used or not.)Gauge manifoldCha

308-7. OUTDOOR UNIT OPERATION MONITOR FUNCTIONSW2 setting1ON23456Display detailExplanation for display UnitOperation indicator SW2 : Indicator ch

31SW2 setting1ON23456Display detailExplanation for display UnitPipe temperature / Liquid(TH3)– 40~90– 40~90(When the coil thermistor detects 0 or bel

32SW2 setting1ON23456Display detailExplanation for display UnitPipe temperature / Liquid(TH3) when error occured.– 40~90– 40~90(When the coil thermist

33SW2 settingDisplay detailExplanation for displayUnit1ON23456Plate HEX liquid pipe temperature(TH6)– 39~88– 39~88(When the temperature is 0 or less

340.1 AInput current of outdoor unit0~5000~500(When it is 100 or more, hundreds digit, tens digit and ones digit are displayed by turns.)PulseLEV-B op

35SW2 settingDisplay detailExplanation for display UnitOperation frequency when error occured.0~2250~225(When it is 100Hz or more, hundreds digit, ten

36SW2 settingDisplay detailExplanation for display UnitSub cool (SC) when error occured. 0~130 Cooling:SC = T63HS-TH3 Heating:SC = T63HS-TH60~130

378-8. FUNCTION OF SWITCHESSwitchFunctionSelectionInitial setting* Function detailsEffective timing (SW1, 8) / Note (SW6)mark No. ON (with) OFF (witho

38DISASSEMBLY PROCEDURE9OPERATING PROCEDUREPUHZ-W90VHA 1. Removing the service panel and top panel(1) Remove 3 screws (5x10) and slide the hook on th

3939OPERATING PROCEDUREPHOTOS&ILLUSTRATION 4. Removing the thermistor <Plate HEX Liquid> (TH6)(1) Remove the service panel. (See figure 1.)

4SPECIFICATIONS2Power supply Phase㱢Voltage VnoitidnocgnitarepolanimoNzHycneuqerFHeating Capacity kW Heating(A2/W35)(A2/W35) 2+)blub-yrD(erutarepmetria

40OPERATING PROCEDUREPHOTOS&ILLUSTRATION 8. Removing the solenoid valve coil <Four-way valve> (21S4) linear expansion valve coil (LEV (A),

41OPERATING PROCEDUREPHOTOS&ILLUSTRATION 11. Removing the bypass valve (1) Remove the service panel. (See figure 1.) (2) Remove the top panel. (S

42OPERATING PROCEDUREPHOTOS&ILLUSTRATION 14. Removing the compressor (MC) (1) Remove the service panel. (See figure 1.) (2) Remove the top panel

43OPERATING PROCEDUREPHOTOS&ILLUSTRATION 17. Removing the interface circuit board (I.F.) : Figure 2 (1) Remove 2 Interface board cover fixing scr

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5DATA31.5m1mMICROPHONEUNITGROUND90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC

63-2. STANDARD OPERATION DATAMode Cooling (A35/W7) Heating (A7/W35)TotalCapacity W 7,100 9,000Input kW 3.55 2.31Electrical circuitOutdoor unit PUHZ-W9

77OUTLINES AND DIMENSIONS4PUHZ-W90VHAHandle for movingSide Air Intake330175 600 1755328370 19417Installation Feet2-U Shaped notched holes(Foundfation

8WIRING DIAGRAM5PUHZ-W90VHATB1MCMF121S463HTH3TH4TH6TH7TH8LEV-A, LEV-BDCLTerminal Block<Power Supply>TB2 Terminal Block<Controller>TB3 Term

9WIRING SPECIFICATIONS6FIELD ELECTRICAL WIRING (power wiring specifications)Outdoor unit power supply ~/N (single), 50Hz, 230 VOutdoor unit Circuit Br