Mitsubishi Electric MUZ-FE12NA1 Manual de servicio

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ··································· 22. PART NAMES AND FUNCTIONS ····················· 33. SPECIFICATION ··

10Max. Length AMax. HeightdifferenceBIndoorunitOutdoor unitMAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCEModel Refrigerant pipin

11DATA7MUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1 MUZ-FE18NA7-1. PERFORMANCE DATA 1) COOLING CAPACITYModel Indoor air Outdoor intake air DB temperature (˚

127-2. PERFORMANCE CURVECoolingThis value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationship

13757065Indoor intake air DB temperature (°F)= 381 CFMAirflow1552535455565Outdoor intake air WB temperature (°F)0.70.50.30.10.90.60.40.20.8Total power

147-3. CONDENSING PRESSURECoolingData is based on the condition of indoor humidity 50 %.Air flow should be set to High speed.MUZ-FE12NA MUZ-FE12NA1(P

15757065(PSIG)(PSIG)Condensing pressureOutdoor ambient temperature155 10 2025303540455055606570(°F)220200180160140240260280320300340360380400757065Suc

167-4. STANDARD OPERATION DATAModel MSZ-FE09NA MSZ-FE12NA MSZ-FE18NAItem Unit Cooling Heating Cooling Heating Cooling HeatingTotalCapacity Btu/h 9,000

177-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCYCapacity correction factorsInput correction factorsInput correction factorsCapacity c

188ACTUATOR CONTROLMUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1 MUZ-FE18NA8-2. R.V. COIL CONTROLHeating . . . . . . . . . . . . . . . . . ON Cooling . . . . .

19SERVICE FUNCTIONS99-1. CHANGE IN DEFROST SETTINGChanging defrost finish temperature<JS> To change the defrost finish temperature, cut/solder t

21TECHNICAL CHANGESMUZ-FE09NAMUZ-FE12NAMUZ-FE18NA1. New modelRevision A:• MUZ-FE18NA has been added.Revision B:• MUZ-FE09NA - 1 and MUZ-FE12NA1 have b

2010-2. FAILURE MODE RECALL FUNCTION1. Flow chart of failure mode recall function for the indoor/outdoor unitMSZ-FE09NAMSZ-FE12NAMSZ-FE18NAOutline of

21Does POWER lamp(MSZ-FE09/12NA)/the up-per lamp of OPERATION INDICATOR lamp(MSZ-FE18NA) on the indoor unit blink at the interval of 0.5 seconds?Blink

22 3. Outdoor unit failure mode tableOPERATION INDICATOR POWER lampUpper lamp(Indoor unit) Abnormal point (Failure mode/protection) LED indication(

2310-3. TROUBLESHOOTING CHECK TABLENo. Symptom LED indication Abnormal point/ Con-dition Condition Remedy1Outdoor unit does not oper-ate. 1-time fl as

24No. Symptom LED indication Abnormal point/ Con-dition Condition Remedy18Outdoor unit operates. 7-time fl ash 2.5 seconds OFF Low discharge tem-perat

2510-4. TROUBLE CRITERION OF MAIN PARTSMUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1 MUZ-FE18NAPart name Check method and criterion FigureDefrost thermistor

2610-5. TROUBLESHOOTING FLOWAre the voltages balanced?Disconnect the connector between compressor and the intelligent power module (IPM).Replace the i

27 F Check of compressor start failure D Check of compressor winding E Check of compressor operation time● Disconnect the connector between the com

28Is the thermistor normal? (Refer to 10-6.1.)Reconnect the connector of thermistor.Turn ON the power supply and press EMERGENCY OPERATION switch. NoR

29 I Check of outdoor fan motorIs the outdoor fan motor normal?(Refer to 10-4.)Replace the outdoor fan motor.Disconnect CN932 from the inverter P.C.

3MUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1Air outletDrain outletPipingDrain hoseAir inlet(back and side)MUZ-FE18NAPipingAir outletDrain outletAir inlet(back

30 J Check of power supplyIs there voltage 208/230 VAC between the indoor terminal block S1 and S2?NoYesReplace the indoor electronic control P.C. bo

31MUZ-FE18NAIs there voltage 208/230 VAC between the indoor terminal block S1 and S2?NoYesReplace the indoor electronic control P.C. board.Rectify ind

32Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor

33Check the outdoor fan motor. (Refer to 10-5. .)Is the fuse (F901) blown on the in-verter P.C. board?Check the connection of the connectors (CN931 ,

34 M How to check miswiring and serial signal errorTurn OFF inverter-controlled lighting equipment.Turn OFF the power supply and then turn ON again.P

35 N Electromagnetic noise enters into TV sets or radiosYesIs the unit grounded?NoGround the unit.YesIs the distance between the antennas and the ind

3610-6. TEST POINT DIAGRAM AND VOLTAGE-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61)Ambient temperature thermistor

37MUZ-FE18NA-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61)Ambient temperature thermistor(RT65)Outdoor heat exchang

3811-1. MUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1NOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove

39OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

43SPECIFICATIONOutdoor unit model MUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1 MUZ-FE18NA Capacity Rated (Minimum~Maximum) Cooling 1Btu/h 9,000 (2,800~9,000) 1

40OPERATING PROCEDUREPHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and am

4111-2. MUZ-FE18NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screws of the service

42OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

43OPERATING PROCEDURE PHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and a

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN© Copyright 2009 MITSUBISHI ELECTRIC CO.,LTDDistributed in Apr. 2011. N

5Test conditionARI Mode Test Indoor air condition (°F) Outdoor air condition (°F)Dry bulb Wet bulb Dry bulb Wet bulbSEER (Cooling) "A-2" Co

6OUTLINES AND DIMENSIONS4Unit: inchMUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1Liquid pipe :1/4 (flared)Gas pipe :3/8 (flared) 6-23/3225-7/82-23/321-3/415-3/

75WIRING DIAGRAMMUZ-FE09NA MUZ-FE12NAMUZ-FE09NA - 1 MUZ-FE12NA1

8MUZ-FE18NA

96REFRIGERANT SYSTEM DIAGRAMUnit: inchMUZ-FE09NA MUZ-FE12NA MUZ-FE12NA1OutdoorheatexchangerFlared connectionDefrostthermistorRT61Dischargetemperatur