Mitsubishi Electronics MUY-D36NA User Manual

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ··································· 32. PART NAMES AND FUNCTIONS ····················· 33. SPECIFICATION ··

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

11DATA7MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA7-1. PERFORMANCE DATA 1) COOLING CAPACITYModel Indoor air Outdoor intake air DB temperature (˚F)

12127-2. PERFORMANCE CURVE65707575706545403530252015Indoor intake air DB temperature (°F)= 848 CFMAirflow15 25 35 45 55Outdoor intake air WB temperatu

13137-3. CONDENSING PRESSURECoolingData is based on the condition of indoor humidity 50 %.Air flow should be set to High speed.MUZ-D36NA(PSIG)Condensi

757065757065(PSIG)(PSIG)Condensing pressureOutdoor ambient temperature14 20 25 30 35 40 45 50 55 60 65 70(°F)20050048046044042040038036034032030028026

15157-4. STANDARD OPERATION DATAModel MSZ-D30NA MSZ-D36NA MSY-D30NA MSY-D36NAItem Unit Cooling Heating Cooling Heating Cooling CoolingTotalCapacity

167-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCYMUZ-D36NACapacity correction factorsInput correction factorsInput correction factorsC

177-6. TEST RUN OPERATION (How to operate fixed-frequency operation)1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT

188ACTUATOR CONTROLMUZ-D30NAMUZ-D36NAMUY-D30NAMUY-D36NA8-3. Relation between main sensor and actuatorSensor PurposeActuatorCompressorLEVOutdoor fan mo

19SERVICE FUNCTIONS9MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA9-1. PRE-HEAT CONTROLIf moisture gets into the refrigerant cycle, or when refrigerant

2

2010TROUBLESHOOTING10-1. CAUTIONS ON TROUBLESHOOTING1. Before troubleshooting, check the following1) Check the power supply voltage.2) Check the indoo

21Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

22Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds?Blinks: The outdoor unit is abnormal. Beep is emi

23 3. Outdoor unit failure mode tableMUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NAThe left lamp of OPERA-TION INDICATOR lamp (Indoor unit) Abnormal po

24The left lamp of OPERA-TION INDICATOR lamp (Indoor unit) Abnormal point(Failure mode / protection) LED indication (Out-door P.C. board) Condition Co

25The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.(Example) When the flashing frequency is “2”.ONOFF2.5-sec

26No. Symptom Indication Abnormal point / Condition Condition CorrespondenceLED1(Red) LED2(Yellow) 20Outdoor unit oper-ates. Once Lighting Primary c

2710-4. TROUBLE CRITERION OF MAIN PARTSMUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NAPart name Check method and criterion FigureDefrost thermistor (RT61

28OPERATION / INDICATOR lamp flashes 5-times.Outdoor unit does not operate.10-5. TROUBLESHOOTING FLOWMeasure the voltage between each lead wire leadin

29OPERATION INDICATOR lamp flashes 6-times.Thermistor is abnormal. Thermistor Symbol Connector, Pin No. Board Defrost (MUZ) RT61 Between CN661 pi

331TECHNICAL CHANGESMUZ-D30NAMUZ-D30NA - U1MUZ-D36NAMUZ-D36NA - U1MUY-D30NAMUY-D36NA1. New modelPART NAMES AND FUNCTIONS2MUZ-D30NAMUY-D30NAPipingAir o

30Heating operation does not work.•Is there voltage of 208 / 230 VAC between pin1 and pin 2 at connector CN912? YesNoDisconnect the lead wire leading

31Fan motor does not operate or stops operating shortly after starting the operation.Is the resistance between each ter-minal of outdoor fan motor nor

32 G Check of LEVWhen cooling, heat exchanger of non-operating indoor unit frosts.When heating, non-operating indoor unit gets warm.Turn ON power supp

33• Unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate.• OPERATION INDICATOR lamp

341. Disconnect the connector CN681 in the electronic control P.C. board.2. Check the resistance of HPS 1 minute after the outdoor unit power supply w

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

36-4 14 32 50 68 86 104100908070605040302010032 50 68 86 104 122 140 158 176200180160140120100806040200Resistance (kΩ)Resistance (kΩ)Temperature (°F)T

37MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA2. Noise filter P.C. board{MUZCN912R.V. coil 208 / 230 VAC60 HzOutput208 / 230 VAC60 Hz Input208 / 230 VAC

38MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA3. Outdoor power board294-370 VDCOutputConnect to the compressorVoltage among phases: 180 VConnect to the

39OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screws of the service panel.(2) Remove the screws of the top panel.(3) Remove the sc

443SPECIFICATIONItem Model MSZ-D30NA MSY-D30NA MSZ-D36NA MSY-D36NA Capacity Rated(Minimum~Maximum)

40OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, P.C. board and power board (1) Remove the top panel, cabinet, service panel and the back

41OPERATING PROCEDUREPHOTOS4. Removing the defrost thermistor (MUZ), discharge temperature thermistor, outdoor heat exchanger temperature thermistor a

42OPERATING PROCEDUREPHOTOS6. Removing the compressor and 4-way valve(1) Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.

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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Fe

55Test conditionARI Mode TestIndoor air condition Outdoor air conditionDry bulb (°F) Wet bulb (°F) Dry bulb (°F) Wet bulb (°F)SEER (Cooling) "A&q

6Open as a rule20 inch or more ifthe front and bothsides are open4 inch or more /8 inch or more if there are obstaclesto both sidesOpen as a rule20 in

775WIRING DIAGRAMMUZ-D30NA MUZ-D36NA

88MUY-D30NA MUY-D36NA

996REFRIGERANT SYSTEM DIAGRAMUnit:inchMUZ-D30NAMUZ-D36NAMUY-D30NAMUY-D36NAOutdoorheatexchangerFlared connectionDefrostthermistorRT61ServiceportService