Mitsubishi Electric MSZ-EF18VEW Service Manual
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Mitsubishi Electric MSZ-EF18VEW Service Manual

Split-type air conditioners indoor unit
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SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Models
MSZ-EF18VEW
MSZ-EF35VEW
MSZ-EF18VEB
MSZ-EF35VEB
MSZ-EF18VES
MSZ-EF35VES
MSZ-EF18VE2W
MSZ-EF35VE2W
MSZ-EF18VE2B
MSZ-EF35VE2B
MSZ-EF18VE2S
MSZ-EF35VE2S
MSZ-EF·VEW
MSZ-EF·VEB
MSZ-EF·VES
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
MSZ-EF22VEW
-
E1
MSZ-EF42VEW
-
E1
MSZ-EF22VEB
-
E1
MSZ-EF42VEB
-
E1
MSZ-EF22VES
-
E1
MSZ-EF42VES
-
E1
,
MSZ-EF22VE2W
-
E1
ER1
,
MSZ-EF42VE2W
-
E1
ER1
,
MSZ-EF22VE2B
-
E1
ER1
,
MSZ-EF42VE2B
-
E1
ER1
,
MSZ-EF22VE2S
-
E1
ER1
,
MSZ-EF42VE2S
-
E1
ER1
Outdoor unit service manual
MUZ-EF·VE(H) Series (OBH590)
MXZ-C·VA Series (OB584)
Revision D:
• The descriptions of the dimensions for MSZ-
EF18/22/25/35/42/50VE2W -
EF18/22/25/35/42/50VE2B -
MSZ-EF18/22/25/35/42/50VE2S -
have been modified.
Please void OBH589 REVISED EDITION-C.
MSZ-EF25VEW
-
E1
MSZ-EF50VEW
-
E1
MSZ-EF25VEB
-
E1
MSZ-EF50VEB
-
E1
MSZ-EF25VES
-
E1
MSZ-EF50VES
-
E1
,
MSZ-EF25VE2W
-
E1
ER1
,
MSZ-EF50VE2W
-
E1
ER1
,
MSZ-EF25VE2B
-
E1
ER1
,
MSZ-EF50VE2B
-
E1
ER1
,
MSZ-EF25VE2S
-
E1
ER1
,
MSZ-EF50VE2S
-
E1
ER1
MXZ-D·VA Series (OBH626)
MXZ-8B Series (OCH480)
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 6
4. NOISE CRITERIA CURVES ······························ 8
5. OUTLINES AND DIMENSIONS ······················ 10
6. WIRING DIAGRAM ·········································· 12
7. REFRIGERANT SYSTEM DIAGRAM ············· 13
8. SERVICE FUNCTIONS ··································· 14
9. MICROPROCESSOR CONTROL ··················· 16
10. TROUBLESHOOTING ····································· 24
11. DISASSEMBLY INSTRUCTIONS ···················· 38
PARTS CATALOG (OBB589)
,
, MSZ-
E1
ER1
,
and
E1
ER1
,
E1
ER1
No. OBH589
REVISED EDITION-D
-
E1
-
E1
-
E1
-
E1
-
E1
-
E1
,
-
E1
ER1
,
-
E1
ER1
,
-
E1
ER1
,
-
E1
ER1
,
-
E1
ER1
,
-
E1
ER1

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Summary of Contents for Mitsubishi Electric MSZ-EF18VEW

  • Page 1: Indoor Unit

    EF18/22/25/35/42/50VE2W - , MSZ- EF18/22/25/35/42/50VE2B - SPLIT-TYPE AIR CONDITIONERS MSZ-EF18/22/25/35/42/50VE2S - have been modified. Please void OBH589 REVISED EDITION-C. INDOOR UNIT No. OBH589 SERVICE MANUAL REVISED EDITION-D Models MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB...
  • Page 2 Revision A: • Airflow in the Silent mode in the cooling operation has been changed. • "TROUBLESHOOTING" has been corrected (10-2, 10-4). Revision B: • MSZ-EF18VEW - , MSZ-EF18VEB - and MSZ-EF18VES - have been added. Revision C: •...

  • Page 3: Technical Changes

    The following models may be connected to the MUZ-EF·VE(H) series after once connected to the MXZ series and operated, for example because of relocation. In that case, the MUZ-EF·VE(H) series outdoor units will not operate without taking a step. Follow the procedure "Deleting the memorized abnormal condition" described in 10-2.1. MSZ-EF18VEW - MSZ-EF22VEW - MSZ-EF25VEW -...

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES Front panel Air filter (Nano platinum filter) Air cleaning filter (Electrostatic anti-allergy enzyme filter, option) Air inlet Emergency...
  • Page 5 MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S Front panel Air filter (Nano platinum filter) Air cleaning filter (Electrostatic anti-allergy enzyme filter) Air inlet Horizontal vane Emergency Air outlet operation switch Heat exchanger Operation Remote control...

  • Page 6: Specification

    SPECIFICATION MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES Indoor model MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S Power supply Single phase 230 V, 50 Hz Cooling Power input Heating Cooling 0.14...
  • Page 7 MSZ-EF42VEW MSZ-EF50VEW MSZ-EF42VEB MSZ-EF50VEB MSZ-EF42VES MSZ-EF50VES Indoor model MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF42VE2S MSZ-EF50VE2S Power supply Single phase 230 V, 50 Hz Cooling Power input Heating Cooling 0.14 0.18 Running current Heating 0.30 0.32 Model RC0J40 Cooling 0.14 0.18 Current Heating 0.30 0.32...

  • Page 8: Noise Criteria Curves

    NOISE CRITERIA CURVES MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High...
  • Page 9 MSZ-EF42VEW MSZ-EF50VEW MSZ-EF42VEB MSZ-EF50VEB MSZ-EF42VES MSZ-EF50VES MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF42VE2S MSZ-EF50VE2S FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 NC-10...

  • Page 10: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES Unit: mm Insulation ø37 O.D Liquid line ø6.35 - 0.5 m (Flared connection ø6.35) ø9.52 - 0.43 m Gas line (Flared connection: ø9.52 (18/22/25/35/42), ø12.7 (50))

  • Page 11: Obh589D

    MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S Unit: mm Insulation ø37 O.D Liquid line ø6.35 - 0.5 m (Flared connection ø6.35) ø9.52 - 0.43 m Gas line (Flared connection: ø9.52 (18/22/25/35/42), ø12.7 (50)) Drain hose Insulation ø28 O.D Connected part ø16 O.D OBH589D...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S OBH589D...

  • Page 13: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S Unit: mm Refrigerant pipe ø9.52 (MSZ-EF18/22/25/35/42)

  • Page 14: Service Functions

    SERVICE FUNCTIONS MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S 8-1. TIMER SHORT MODE For service, the following set time can be shortened by bridging JPG and JPS on the electronic control P.C.

  • Page 15: Auto Restart Function

    8-3. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT (MSZ-EF•VE2W/B/S) A maximum of 4 indoor units with wireless remote controllers can be used in a room. To operate the indoor units individually with each remote controller, assign a number to each remote controller according to the number of the indoor unit.

  • Page 16: Microprocessor Control

    MICROPROCESSOR CONTROL MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S WIRELESS REMOTE CONTROLLER...
  • Page 17 MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S Signal transmitting section FAN SPEED CONTROL button Operation display section OPERATION SELECT button VANE CONTROL button ECONO COOL button TIME, TIMER set buttons FORWARD button BACKWARD button i save button...

  • Page 18: Fan Operation

    9-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons TEMP button to select the desired temperature. The setting range is 16 - 31°C. 1.

  • Page 19: Auto Vane Operation

    NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT: MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit. • When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the others for heating, the operation mode of the indoor unit that operates first is selected.

  • Page 20: Timer Operation

    (9) ECONO COOL ( ) operation (ECONOmical operation) When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2°C higher by micro- processor. However, the temperature on the LCD screen on the remote controller is not changed. Also the horizontal vane swings in various cycle.

  • Page 21: Weekly Timer Operation

    9-8. WEEKLY TIMER OPERATION • A maximum of 4 ON or OFF timers can be set for individual days of the week. • A maximum of 28 ON or OFF timers can be set for a week. NOTE: The simple ON/OFF timer setting is available while the weekly timer is on. In this case, the ON/OFF timer has priority over the •...

  • Page 22: I-Save Operation

    (4) Press button to complete and transmit the weekly timer setting. which was blink- ing goes out, and the current time will be displayed. NOTE: • Press button to transmit the setting information of weekly timer to the indoor unit. Point the remote controller toward the indoor unit for 3 seconds.

  • Page 23: Emergency/Test Operation

    9-10. EMERGENCY/TEST OPERATION In the case of test run operation or emergency operation, use Operation mode COOL/HEAT EMERGENCY OPERATION switch on the right side of the indoor unit. Set temperature 24°C Emergency operation is available when the remote controller is missing Fan speed Med.

  • Page 24: Troubleshooting

    TROUBLESHOOTING MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S 10-1. CAUTIONS ON TROUBLESHOOTING 1.
  • Page 25 10-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-4.) disappears, the memorized failure details can be recalled. 1.
  • Page 26 2. Indoor unit failure mode table The left lamp of Abnormal point OPERATION INDI- Condition Remedy (Failure mode) CATOR lamp Not lighted Normal — — The room temperature thermistor short or 1-time fl ash every Room temperature Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second thermistor...
  • Page 27 10-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Indoor unit oper- Indoor unit does OPERATION INDICATOR Outdoor unit does not receive the ates. lamp on the indoor unit is not operate normally. signal from re- Outdoor unit fl ashing ON and OFF. does not operate.
  • Page 28 10-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes. OPERATION INDICATOR Lighted Blinking...

  • Page 29: Trouble Criterion Of Main Parts

    10-5. TROUBLE CRITERION OF MAIN PARTS MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B...

  • Page 30: Troubleshooting Flow

    10-6. TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector CN211. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
  • Page 31 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press OPERATE/STOP (ON/OFF) button on the remote controller. 1 Look at the image of the signal transmitting section of the remote controller through the monitor of a digital camera or a camera phone.
  • Page 32 C Check of indoor P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 from indoor power P.C. board and vane Measure the resistance of indoor fan Short circuit: motor connector CN151 from the indoor motor.
  • Page 33 D How to check miswiring and serial signal error MUZ-EF Type Turn the main power supply OFF. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)? The connection information to the Multi series is stored...
  • Page 34 MXZ Type Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Check the wiring. Press EMERGENCY OPERATION switch once. Does the left lamp of OPERATION INDICATOR lamp light up? <Confi...
  • Page 35 E Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 3 m, or is the the indoor unit, and/or the antennas and the distance between the antennas and the outdoor unit.
  • Page 36 10-7. TEST POINT DIAGRAM AND VOLTAGE Indoor power P.C. board, Indoor electronic control P.C. board, Receiver board, Display board, Switch board MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES Fuse (F11)
  • Page 37 MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S Fuse (F11) Varistor (NR11) Indoor fan motor Indoor power P.C. board (CN211) Connector to terminal 325 VDC block (CN201) (–) GND (high- voltage DC) 15 VDC (+)3-6 VDC...

  • Page 38: Operating Procedure

    Locking lever lever. Connector MSZ-EF18VEW MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW MSZ-EF18VEB MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB MSZ-EF18VES MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES MSZ-EF18VE2W MSZ-EF22VE2W MSZ-EF25VE2W MSZ-EF35VE2W MSZ-EF42VE2W MSZ-EF50VE2W MSZ-EF18VE2B MSZ-EF22VE2B MSZ-EF25VE2B MSZ-EF35VE2B MSZ-EF42VE2B MSZ-EF50VE2B MSZ-EF18VE2S MSZ-EF22VE2S MSZ-EF25VE2S MSZ-EF35VE2S MSZ-EF42VE2S MSZ-EF50VE2S NOTE: Turn OFF power supply before disassembly.
  • Page 39 OPERATING PROCEDURE PHOTOS 2. Remove the indoor electrical box Photo 2 Electrical box Earth wire (1) Remove the panel (Refer to 1.) and the corner box right. (2) Remove the screw of the V.A. clamp. Remove the V.A. clamp and the indoor/outdoor connecting wire.
  • Page 40 OPERATING PROCEDURE PHOTOS 4. Removing the nozzle assembly Photo 4 (1) Remove the panel (Refer to 1.) and the corner box right. (2) Remove the indoor/outdoor connecting wire (Refer to 2.). (3) Remove the electrical cover (Refer to 2.). (4) Disconnect the following connector: <Indoor electronic control P.C.
  • Page 41 OPERATING PROCEDURE PHOTOS 6. Removing the indoor fan motor, the indoor coil Photo 5 Lead wire of thermistor and the line flow fan the indoor coil thermistor (1) Remove the panel (Refer to 1.) and the corner box right. (2) Remove the indoor electronic control P.C. board holder, the electrical box and the nozzle assembly.
  • Page 42 Do not pull the lead wire when removing the indoor coil thermistor. HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2010 MITSUBISHI ELECTRIC CORPORATION Distributed in Mar. 2014. No. OBH589 REVISED EDITION-D Distributed in Jan. 2014. No. OBH589 REVISED EDITION-C Distributed in Nov.

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