Mitsubishi Electric MSZ-EF22VEW User manual

CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS····················· 4
3. SPECIFICATION················································ 5
4. NOISE CRITERIA CURVES ······························ 6
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM············································ 9
7. REFRIGERANT SYSTEM DIAGRAM ··············· 9
8. SERVICE FUNCTIONS ··································· 10
9. MICROPROCESSOR CONTROL ··················· 12
10. TROUBLESHOOTING····································· 18
11. DISASSEMBLY INSTRUCTIONS ···················· 31
SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL No. OBH589
INDOOR UNIT
PARTS CATALOG (OBB589)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
Models
MSZ-EF22VEW -
E1
MSZ-EF22VEB -
E1
MSZ-EF22VES -
E1
MSZ-EF25VEW -
E1
MSZ-EF25VEB -
E1
MSZ-EF25VES -
E1
MSZ-EF35VEW -
E1
MSZ-EF35VEB -
E1
MSZ-EF35VES -
E1
MSZ-EF42VEW -
E1
MSZ-EF42VEB -
E1
MSZ-EF42VES -
E1
MSZ-EF50VEW -
E1
MSZ-EF50VEB -
E1
MSZ-EF50VES -
E1
Models
MSZ-EF22VEW -
E1
MSZ-EF25VEW -
E1
MSZ-EF35VEW -
E1
MSZ-EF42VEW -
E1
MSZ-EF50VEW -
E1
MSZ-EF22VEB -
E1
MSZ-EF25VEB -
E1
MSZ-EF35VEB -
E1
MSZ-EF42VEB -
E1
MSZ-EF50VEB -
E1
MSZ-EF22VES -
E1
MSZ-EF25VES -
E1
MSZ-EF35VES -
E1
MSZ-EF42VES -
E1
MSZ-EF50VES -
E1
Outdoor unit service manual
MUZ-EF·VE(H) Series (OBH590)
MXZ-C·VA Series (OB584)

2
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.

3
TECHNICAL CHANGES
1
MSZ-EF22VEW - E1 MSZ-EF25VEW - E1 MSZ-EF35VEW - E1
MSZ-EF42VEW - E1 MSZ-EF50VEW - E1
MSZ-EF22VEB - E1 MSZ-EF25VEB - E1 MSZ-EF35VEB - E1
MSZ-EF42VEB - E1 MSZ-EF50VEB - E1
MSZ-EF22VES - E1 MSZ-EF25VES - E1 MSZ-EF35VES - E1
MSZ-EF42VES - E1 MSZ-EF50VES - E1
1. New model
These models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-EF·VE(H)-series outdoor units enables the low standby power control. Refer to the tech-
nical guide (OBT17) about the low standby power control.
These models may be connected to the MUZ-EF·VE(H) series after once connected to the MXZ-VA 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 described in 10-2. "Deleting the memorized abnormal condition".

4
ACCESSORIES
MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES
PART NAMES AND FUNCTIONS
2
Model
MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES
Installation plate 1
Installation plate fixing screw 4 × 25 mm 5
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Soft dry cloth (VEB type only) 1
Operation
indicator lamp
Remote control
receiving section
Emergency
operation switch
Horizontal vane
Air inlet
Air filter
(Nano platinum filter)
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter, option)
Heat exchanger
Front panel
Air outlet
Remote controller

5
Indoor model
MSZ-EF22VEW
MSZ-EF22VEB
MSZ-EF22VES
MSZ-EF25VEW
MSZ-EF25VEB
MSZ-EF25VES
MSZ-EF35VEW
MSZ-EF35VEB
MSZ-EF35VES
MSZ-EF42VEW
MSZ-EF42VEB
MSZ-EF42VES
MSZ-EF50VEW
MSZ-EF50VEB
MSZ-EF50VES
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
1
Cooling W14 18
Heating 27 31 34
Running
current 1
Cooling A0.14 0.18
Heating 0.26 0.30 0.32
Fan motor
Model RC0J40
Current 1 Cooling A0.14 0.18
Heating 0.26 0.30 0.32
Dimensions W × H × D mm 895 × 299 × 195
Weight kg 11.5
Special remarks
Air direction 5
Airflow
Cooling
Super High
m3/h
630 618 660
High 498 534 558
Med. 378 462 474
Low 276 396 408
Silent 240
Heating
Super High
m3/h
714 762 792
High 534 594 666
Med. 372 468 540
Low 276 378 438
Silent 240 330 384
Sound level
Cooling
Super High
dB(A)
42 43
High 36 39 40
Med. 29 35 36
Low 23 24 31 33
Silent 21 28 30
Heating
Super High
dB(A)
45 46 48 49
High 37 38 41 43
Med. 29 30 35 37
Low 24 30 33
Silent 21 28 30
Fan speed
Cooling
Super High
rpm
1,200 1,180 1,240
High 990 1,050 1,080
Med. 800 930 950
Low 630 830 850
Silent 570 750
Heating
Super High
rpm
1,330 1,400 1,440
High 1,050 1,140 1,250
Med. 790 940 1,060
Low 630 800 890
Silent 570 720 810
Fan speed regulator 5
Remote controller model SG11D
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C
Heating: Indoor Dry-bulb temperature 20°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
1 Measured under rated operating frequency.
SPECIFICATION
3

6
MSZ-EF22VEW MSZ-EF25VEW
MSZ-EF22VEB MSZ-EF25VEB
MSZ-EF22VES MSZ-EF25VES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
46
NC-10
MSZ-EF35VEW
MSZ-EF35VEB
MSZ-EF35VES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
45
NC-10
NOISE CRITERIA CURVES
4
Specifications and rating conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 VDC
Varistor (NR11) S10K300E2K1 (ERZV10D471)
Terminal block (TB) 3P

7
Test conditions
Cooling: Dry-bulb temperature 27 °C
Wet-bulb temperature 19 °C
Heating: Dry-bulb temperature 20 °C
INDOOR UNIT
WALL
MICROPHONE
0.8m
1m
MSZ-EF42VEW
MSZ-EF42VEB
MSZ-EF42VES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
43
49
NC-10
MSZ-EF50VEW
MSZ-EF50VEB
MSZ-EF50VES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
42
48
NC-10

8
Unit: mm
MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES
Piping
Insulation ø37 O.D
Liquid line ø6.35 - 0.5 m (Flared connection ø6.35)
Gas line ø9.52 - 0.43 m
(Flared connection: ø9.52 (22/25/35/42), ø12.7 (50))
Drain hose Insulation ø28 O.D Connected part ø16 O.D
OUTLINES AND DIMENSIONS
5

9
MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES
WIRING DIAGRAM
6
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø9.52 (MSZ-EF22/25/35/42)
ø12.7 (MSZ-EF50)
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
Unit: mm
REFRIGERANT SYSTEM DIAGRAM
7
MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES

10
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.
The time will be shortened as follows. (Refer to 10-7.)
Set time: 1 minute →1 second
Set time: 3 minutes →3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by short circuit-of JPG and JPS.)
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be
modified according to the number of the indoor unit.
How to modify the remote controller P.C. board
Remove batteries before modification.
The board has a print as shown below:
The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.
After modification, press the RESET button.
NOTE: For modification, take out the batteries and press the OPERATE/STOP (ON/OFF) button twice or 3 times at first.
After modification, put back the batteries then press the RESET button.
Table 1
1 unit operation 2 units operation 3 units operation 4 units operation
No. 1 unit No modification Same as at left Same as at left Same as at left
No. 2 unit — Solder J1 Same as at left Same as at left
No. 3 unit — — Solder J2 Same as at left
No. 4 unit — — — Solder both J1 and J2
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote
controller for the indoor unit.
The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set.
The setting will be cancelled if the breaker is turned OFF, or the power supply is shut down.
Please conduct the above setting once again after the power has restored.
SERVICE FUNCTIONS
8
J1 J2
MSZ-EF22VEW MSZ-EF25VEW MSZ-EF35VEW MSZ-EF42VEW MSZ-EF50VEW
MSZ-EF22VEB MSZ-EF25VEB MSZ-EF35VEB MSZ-EF42VEB MSZ-EF50VEB
MSZ-EF22VES MSZ-EF25VES MSZ-EF35VES MSZ-EF42VES MSZ-EF50VES