Mitsubishi Mr.Slim MSZ-FE12NA Service Manual

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

108-2. DRY ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. POWER lamp of the indoor unit turns on with a beep tone.(2) Select DRY mode with OPE

118-5. AUTO VANE OPERATION1. Horizontal vane(1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotatin

12(9) To change the airflow direction not to blow directly onto your body.To change the air fl ow directionWhen to use this function? COOL/DRY HEATPres

138-6. i-see CONTROL OPERATIONThe sensors constantly measure the room and floor/wall temperatures to automatically adjust to the set temperature by es

14Indoor unit installation location and air-conditioning area·Be sure to set the slide switch inside the remote controller to an appropriate position

15Operation and operating rangei-see sensor moves 30 degrees from the center in both right and left side.i-see Sensor operates as follows in accordanc

16(Example 1) The current time is 8:00 PM.The unit turns off at 11:00 PM, and on at 6:00 AM.• OFF timer and ON timer can be used in combination. The t

178-11. Changing temperature indication (°F/°C)8-10. 3-MINUTE TIME DELAY OPERATIONWhen the system turns OFF, compressor will not restart for 3 minutes

189-1. CAUTIONS ON TROUBLESHOOTING1. Before troubleshooting, check the following1) Check the power supply voltage.2) Check the indoor/outdoor connecti

19Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

21TECHNICAL CHANGESMSZ-FE09NAMSZ-FE12NA 1. New model

202. Indoor unit failure mode tablePOWER Abnormal point (Failure mode) Condition RemedyNot lighted Normal — —1-time fl ash every 0.5-second Room temp

21Indoor unit oper-ates.Outdoor unit does not operate.If blinking of OPERATION INDI-CATOR lamp cannot be checked, it can be checked with failure mode

229-4. TROUBLESHOOTING CHECK TABLEBefore taking measures, make sure that the symptom reappears for accurate troubleshooting.When the indoor unit has s

23 L AREA R POWER No. Abnormal point Operation indicator lamp Symptom Condition Remedy1MXZ type Operation mode settingPOWER lamp is ligh

24 A Check of indoor fan motor9-6. TROUBLESHOOTING FLOWThe indoor fan motor error has occurred, and the indoor fan does not operate.Turn OFF the powe

25 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner.Does th

26 C Check of indoor electronic control P.C. board and indoor fan motorTurn OFF the power supply.Remove indoor fan motor connector CN211, vane motor

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

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

29MSZ-FE09NA MSZ-FE12NA1. Indoor electronic control P.C. board9-7. TEST POINT DIAGRAM AND VOLTAGERoom temperature thermistor (RT11)Indoor coil thermi

3PART NAMES AND FUNCTIONS2MSZ-FE09NA MSZ-FE12NAFront panelAir filterAir inletOperation indicator lampPlatinum deodorizing filterAnti-allergy Enzyme Fil

302. Power monitor receiver P.C. board3. Monitor P.C. board

31MSZ-FE09NA MSZ-FE12NANOTE:Turn OFF power supply before disassembling.OPERATING PROCEDUREPHOTOS1. Removing the panel(1) Hold both sides of the fron

32OPERATING PROCEDUREPHOTOS2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, i-see Sensor, SW P.C. board and the t

33OPERATING PROCEDUREPHOTOS3. Removing the electrical box(1) Remove the panel (Refer to 1.) and the corner box.(2) Remove the indoor/outdoor connectin

34OPERATING PROCEDUREPHOTOS6. Removing the horizontal vane motor(1) Remove the nozzle assembly. (Refer to 4.)(2) Remove the screws of the horizontal v

35

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN© Copyright 2009 MITSUBISHI ELECTRIC CO.,LTDDistributed in Jul. 2009. No

43SPECIFICATIONIndoor model MSZ-FE09NA MSZ-FE12NAPower supply V, phase, Hz 208/230 , 1 , 60Max. fuse size (time delay)/ Disconnect switchA15Min. circu

54OUTLINES AND DIMENSIONSUnit: inchMSZ-FE09NA MSZ-FE12NA30-7/831-3/81/21-7/82-3/1611-5/827-1/163/42-5/166-1/41-11/162-11/162-3/163-15/161/210-1/8 1/4

65WIRING DIAGRAMMSZ-FE09NA MSZ-FE12NAREFRIGERANT SYSTEM DIAGRAM6MSZ-FE09NA MSZ-FE12NARefrigerant flow in coolingRefrigerant flow in heatingUnit:inch

77-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time wil

8NOTE:• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.• If main power

98MICROPROCESSOR CONTROLWIRELESS REMOTE CONTROLLERMSZ-FE09NA MSZ-FE12NAON TIMER buttonCLOCK SET buttonTIME SET buttonsFORWARD buttonBACKWARD buttonOF