SERVICE MANUALCONTENTS1. TECHNICAL CHANGES·······································22. PART NAMES AND FUNCTIONS ····················· 33. SPECIFICATION
107-1. 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 wi
11NOTE:• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.• If main powe
12Signal transmitting sectionOperation display sectionOPERATE/STOP (ON/OFF) buttonFAN SPEED CONTROL buttonOPERATION SELECT buttonPOWERFUL buttonIndica
138-1. COOL ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. POWER lamp (MSZ-FE09/12NA)/OPERATION INDICATOR lamp (MSZ-FE18NA) of the indoor uni
148-3. HEAT ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. POWER lamp (MSZ-FE09/12NA)/OPERATION INDICATOR lamp (MSZ-FE18NA) of the indoor unit
158-5. AUTO VANE OPERATION1. Horizontal vane(1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotatin
16(8) Cold air prevention in HEAT operationThe horizontal vane position is set to Upward.NOTE: When 2 or more indoor units are operated with multi out
178-6. i-see CONTROL OPERATION (MSZ-FE09NA MSZ-FE12NA)The sensors constantly measure the room and floor/wall temperatures to automatically adjust to
18Indoor unit installation location and air-conditioning area·Be sure to set the slide switch inside the remote controller to an appropriate position
19Operation 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
21TECHNICAL CHANGESMSZ-FE09NAMSZ-FE12NAMSZ-FE18NA 1. New modelRevision A:• MSZ-FE18NA has been added.Use the specifi ed refrigerant onlyNever use any
20(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
218-11. Changing temperature indication (°F/°C)8-10. 3-MINUTE TIME DELAY OPERATIONWhen the system turns OFF, compressor will not restart for 3 minutes
229-1. CAUTIONS ON TROUBLESHOOTING1. Before troubleshooting, check the following1) Check the power supply voltage.2) Check the indoor/outdoor connecti
23Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro
242. Indoor unit failure mode tablePOWER lampUpper lampAbnormal point (Failure mode) Condition RemedyNot lighted Normal — —1-time fl ash every 0.5-se
25Indoor 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
269-4. TROUBLESHOOTING CHECK TABLEBefore taking measures, make sure that the symptom reappears for accurate troubleshooting.When the indoor unit has s
27 L AREA R POWER No. Abnormal point Operation indicator lamp Symptom Condition Remedy1MXZ type Operation mode settingMSZ-FE09/12NAPOWER
289-6. TROUBLESHOOTING FLOW A Check of indoor fan motorThe indoor fan motor error has occurred, and the indoor fan does not operate.Turn OFF the powe
29 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
3PART NAMES AND FUNCTIONS2MSZ-FE09NA MSZ-FE12NAFront panelAir filterAir inletOperation indicator lampPlatinum deodorizing filterAnti-allergy Enzyme Fil
30 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
31CN211R111Indoor electroniccontrol P.C. boardIndoor terminalP.C. boardFuse(F11)Varistor(NR11)YesNo 1. The fan motor connector's lead wire i
32 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
33 E Electromagnetic noise enters into TV sets or radiosYesIs the unit grounded?NoGround the unit.YesIs the distance between the antennas and the ind
34MSZ-FE09NA MSZ-FE12NA1. Indoor electronic control P.C. board9-7. TEST POINT DIAGRAM AND VOLTAGERoom temperature thermistor (RT11)Indoor coil thermi
354. Indoor terminal P.C. board, Indoor electronic control P.C. board, Power monitor receiver SW P.C. boardRoom temperature thermistor (RT11)Indoor co
3610-1. MSZ-FE09NA MSZ-FE12NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDUREPHOTOS1. Removing the panel(1) Hold both sides of the
37OPERATING 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
38OPERATING PROCEDUREPHOTOS3. Removing the electrical box(1) Remove the panel (Refer to 1.) and the corner box.(2) Remove the indoor/outdoor connectin
39OPERATING PROCEDUREPHOTOS6. Removing the horizontal vane motor(1) Remove the nozzle assembly. (Refer to 4.)(2) Remove the screws of the horizontal v
4Remote controller Display sectionFront panelAir filter(Nano platinum filter)Air inletAir cleaning filter(Electrostatic anti-alergy enzyme filter)Air
4010-2. MSZ-FE18NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOTOS1. Removing the panel(1) Remove the horizontal vanes.(2) Re
41OPERATING PROCEDURE PHOTOS3. Removing the indoor electrical box(1) Remove the panel (Refer to 1.) and the corner box.(2) Remove the indoor/outdoor c
42OPERATING PROCEDURE PHOTOS5. Removing the vertical vane motor unit(1) Remove the nozzle assembly. (Refer to 4.)(2) Remove the crank of the vertical
43OPERATING PROCEDURE PHOTOS7. Removing the water cut, the indoor fan motor, the indoor coil thermistor, and the line flow fan(1) Remove the panel (Re
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN© Copyright 2009 MITSUBISHI ELECTRIC CO., LTDDistributed in Apr. 2011.
53SPECIFICATIONIndoor modelMSZ-FE09NA MSZ-FE12NA MSZ-FE18NAPower supply V, phase, Hz 208/230 , 1 , 60Max. fuse size (time delay)/ Disconnect switchA15
64OUTLINES 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
75WIRING DIAGRAMMSZ-FE09NA MSZ-FE12NA
8MSZ-FE18NAMSZ-FE09NA - 8 MSZ-FE12NA - 8
9MSZ-FE09NA MSZ-FE12NARefrigerant flow in coolingRefrigerant flow in heatingUnit: inchIndoorheatexchangerFlared connectionRoom temperaturethermistorR
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