Mitsubishi Mr.Slim MSZ-FE09NA Service Manual

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ··································· 22. PART NAMES AND FUNCTIONS ····················· 23. SPECIFICATION ··

107-2. 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

11757065Indoor intake air DB temperature (°F)= 381 CFMAirflow1552535455565Outdoor intake air WB temperature (°F)0.70.50.30.10.90.60.40.20.8Total power

127-3. CONDENSING PRESSURECoolingData is based on the condition of indoor humidity 50 %.Air flow should be set to High speed.MUZ-FE12NA(PSIG)Condensin

13757065(PSIG)(PSIG)Condensing pressureOutdoor ambient temperature155 10 2025303540455055606570(°F)220200180160140240260280320300340360380400757065Suc

147-4. STANDARD OPERATION DATAModel MSZ-FE09NA MSZ-FE12NA MSZ-FE18NAItem Unit Cooling Heating Cooling Heating Cooling HeatingTotalCapacity Btu/h 9,000

157-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCYCapacity correction factorsInput correction factorsInput correction factorsCapacity c

168ACTUATOR CONTROLMUZ-FE09NA MUZ-FE12NA MUZ-FE18NA8-2. R.V. COIL CONTROLHeating . . . . . . . . . . . . . . . . . ON Cooling . . . . . . . . . . .

17SERVICE FUNCTIONS99-1. CHANGE IN DEFROST SETTINGChanging defrost finish temperature<JS> To change the defrost finish temperature, cut/solder t

1810-2. FAILURE MODE RECALL FUNCTION1. Flow chart of failure mode recall function for the indoor/outdoor unitMSZ-FE09NAMSZ-FE12NAMSZ-FE18NAOutline of

19Does 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

21TECHNICAL CHANGESMUZ-FE09NAMUZ-FE12NAMUZ-FE18NA1. New modelPART NAMES AND FUNCTIONS2MUZ-FE09NA MUZ-FE12NAAir outletDrain outletPipingDrain hoseAir

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

2110-3. TROUBLESHOOTING CHECK TABLENo. Symptom LED indication Abnormal point/ Con-dition Condition Remedy1Outdoor unit does not oper-ate. 1-time fl as

22No. Symptom LED indication Abnormal point/ Con-dition Condition Remedy18Outdoor unit operates. 7-time fl ash 2.5 seconds OFF Low discharge tem-perat

2310-4. TROUBLE CRITERION OF MAIN PARTSMUZ-FE09NA MUZ-FE12NA MUZ-FE18NAPart name Check method and criterion FigureDefrost thermistor (RT61) Ambien

2410-5. TROUBLESHOOTING FLOWAre the voltages balanced?Disconnect the connector between compressor and the intelligent power module (IPM).Replace the i

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

26Is the thermistor normal? (Refer to 10-6.1.)Reconnect the connector of thermistor.Turn ON the power supply and press EMERGENCY OPERATION switch. NoR

27 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.

28 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

29MUZ-FE18NAIs there voltage 208/230 VAC between the indoor terminal block S1 and S2?NoYesReplace the indoor electronic control P.C. board.Rectify ind

33SPECIFICATIONOutdoor unit model MUZ-FE09NA MUZ-FE12NA MUZ-FE18NA Capacity Rated (Minimum~Maximum) Cooling 1Btu/h 9,000 (2,800~9,000) 12,000 (2,800~1

30Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor

31Check 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 ,

32 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

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

3410-6. TEST POINT DIAGRAM AND VOLTAGE-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61)Ambient temperature thermistor

35MUZ-FE18NA-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61)Ambient temperature thermistor(RT65)Outdoor heat exchang

3611-1. MUZ-FE09NA MUZ-FE12NANOTE: Turn OFF power supply before disassembling.OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screw f

37OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

38OPERATING PROCEDUREPHOTOS5. Removing outdoor fan motor(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the connectors for outdoor fan

3911-2. MUZ-FE18NANOTE: Turn OFF power supply before disassembling.OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screws of the servi

4Test conditionARI Mode Test Indoor air condition (°F) Outdoor air condition (°F)Dry bulb Wet bulb Dry bulb Wet bulbSEER (Cooling) "A-2" Co

40OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

41OPERATING PROCEDURE PHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and a

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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN© Copyright 2009 MITSUBISHI ELECTRIC CO.,LTDDistributed in Sep. 2010. N

5OUTLINES AND DIMENSIONS4Unit: inchMUZ-FE09NA MUZ-FE12NALiquid pipe :1/4 (flared)Gas pipe :3/8 (flared) 6-23/3225-7/82-23/321-3/415-3/412 ~ 12-3/41

65WIRING DIAGRAMMUZ-FE09NA MUZ-FE12NAMUZ-FE18NA

76REFRIGERANT SYSTEM DIAGRAMUnit: inchMUZ-FE09NA MUZ-FE12NAOutdoorheatexchangerFlared connectionDefrostthermistorRT61DischargetemperaturethermistorRT

8Max. Length AMax. HeightdifferenceBIndoorunitOutdoor unitMAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCEModel Refrigerant piping

9DATA7MUZ-FE09NA MUZ-FE12NA MUZ-FE18NA7-1. PERFORMANCE DATA 1) COOLING CAPACITYModel Indoor air Outdoor intake air DB temperature (˚F) IWB (˚F) 75