Mitsubishi Electric MUZ-EF VG Series User manual

1
INDOOR UNIT No. OBH831
REVISED EDITION-A
Models
MSZ-EF18VGW/B/S -E1 ,E2 MSZ-EF18VGKW/B/S -E1
MSZ-EF22VGW/B/S -E1 ,ET1 ,E2 ,ET2 MSZ-EF22VGKW/B/S -E1 ,ET1
MSZ-EF25VGW/B/S -E1 ,ET1 ,E2 ,ET2 MSZ-EF25VGKW/B/S -E1 ,ET1
MSZ-EF35VGW/B/S -E1 ,ET1 ,E2 ,ET2 MSZ-EF35VGKW/B/S -E1 ,ET1
MSZ-EF42VGW/B/S -E1 ,ET1 ,E2 ,ET2 MSZ-EF42VGKW/B/S -E1 ,ET1
MSZ-EF50VGW/B/S -E1 ,ET1 ,E2 ,ET2 MSZ-EF50VGKW/B/S -E1 ,ET1
MSZ-EF∙VGW/VGKW
MSZ-EF∙VGB/VGKB
MSZ-EF∙VGS/VGKS PARTS CATALOG (OBB831)
CONTENTS
1. TECHNICAL CHANGES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 3
2. PART NAMES AND FUNCTIONS∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4
3. SPECIFICATION∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 5
4. NOISE CRITERIA CURVES∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 7
5. OUTLINES AND DIMENSIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 9
6. WIRING DIAGRAM∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 10
7. REFRIGERANT SYSTEM DIAGRAM∙∙∙∙∙∙∙∙∙∙∙∙∙ 15
8. SERVICE FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 16
9. MICROPROCESSOR CONTROL ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 19
10. TROUBLESHOOTING∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 27
11. DISASSEMBLY INSTRUCTIONS∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 44
SERVICE MANUAL
Outdoor unit service manual
MUZ-EF∙VG/H Series (OBH832)
MXZ-F∙VF Series(OBH790)
OBH831 is void.
Revision A:
• MSZ-EF18/22/25/35/42/50VGW/B/S - E2 ,
MSZ-EF22/25/35/42/50VGW/B/S - ET2 ,
MSZ-EF18/22/25/35/42/50VGKW/B/S - E1 and
MSZ-EF22/25/35/42/50VGKW/B/S - ET1
have been added.

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.
Use the specied refrigerant only
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
Revision A:
• MSZ-EF18/22/25/35/42/50VGW/B/S - E2 , MSZ-EF22/25/35/42/50VGW/B/S - ET2 ,
MSZ-EF18/22/25/35/42/50VGKW/B/S - E1 and MSZ-EF22/25/35/42/50VGKW/B/S - ET1 have been added.
OBH831A

3
TECHNICAL CHANGES
1
The following models are compatible with the outdoor units with low standby power control.
Connecting the following models to the MUZ-EF∙VG/H series outdoor units enables the low standby power control.
The following models may be connected to the MUZ-EF∙VG/H series after once connected to the MXZ series and operated,
for example because of relocation. In that case, the MUZ-EF∙VG/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-EF18VGW/B/S - E1 MSZ-EF18VGW/B/S - E2
MSZ-EF22VGW/B/S - E1 ,- ET1 MSZ-EF22VGW/B/S - E2 ,- ET2
MSZ-EF25VGW/B/S - E1 ,- ET1 MSZ-EF25VGW/B/S - E2 ,- ET2
MSZ-EF35VGW/B/S - E1 ,- ET1 MSZ-EF35VGW/B/S - E2 ,- ET2
MSZ-EF42VGW/B/S - E1 ,- ET1 MSZ-EF42VGW/B/S - E2 ,- ET2
MSZ-EF50VGW/B/S - E1 ,- ET1 MSZ-EF50VGW/B/S - E2 ,- ET2
1. Indoor electronic control P.C. board has been changed.
MSZ-EF18VGW/B/S - E1
MSZ-EF22VGW/B/S - E1 ,- ET1
MSZ-EF25VGW/B/S - E1 ,- ET1
MSZ-EF35VGW/B/S - E1 ,- ET1
MSZ-EF42VGW/B/S - E1 ,- ET1
MSZ-EF50VGW/B/S - E1 ,- ET1
MSZ-EF18VGKW/B/S - E1
MSZ-EF22VGKW/B/S - E1 ,- ET1
MSZ-EF25VGKW/B/S - E1 ,- ET1
MSZ-EF35VGKW/B/S - E1 ,- ET1
MSZ-EF42VGKW/B/S - E1 ,- ET1
MSZ-EF50VGKW/B/S - E1 ,- ET1
1. New model
OBH831A

4
PART NAMES AND FUNCTIONS
2
ACCESSORIES
MSZ-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF35VGW MSZ-EF42VGW MSZ-EF50VGW
MSZ-EF18VGB MSZ-EF22VGB MSZ-EF25VGB MSZ-EF35VGB MSZ-EF42VGB MSZ-EF50VGB
MSZ-EF18VGS MSZ-EF22VGS MSZ-EF25VGS MSZ-EF35VGS MSZ-EF42VGS MSZ-EF50VGS
Operation
indicator lamp
Remote control
receiving section
Emergency
operation switch
Horizontal vane
Air inlet
Air filter
(Air purifying filter)
Air cleaning filter
(Silver-ionized air purifier
filter)
Heat exchanger
Front panel
Air outlet
Wi-Fi interface
(Only for MSZ-EF·VGKW/B/S)
MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW MSZ-EF35VGKW MSZ-EF42VGKW MSZ-EF50VGKW
MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB MSZ-EF35VGKB MSZ-EF42VGKB MSZ-EF50VGKB
MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS MSZ-EF35VGKS MSZ-EF42VGKS MSZ-EF50VGKS
Remote controller
Model
MSZ-EF18VGW MSZ-EF18VGB MSZ-EF18VGS
MSZ-EF22VGW MSZ-EF22VGB MSZ-EF22VGS
MSZ-EF25VGW MSZ-EF25VGB MSZ-EF25VGS
MSZ-EF35VGW MSZ-EF35VGB MSZ-EF35VGS
MSZ-EF42VGW MSZ-EF42VGB MSZ-EF42VGS
MSZ-EF50VGW MSZ-EF50VGB MSZ-EF50VGS
MSZ-EF18VGKW MSZ-EF18VGKB MSZ-EF18VGKS
MSZ-EF22VGKW MSZ-EF22VGKB MSZ-EF22VGKS
MSZ-EF25VGKW MSZ-EF25VGKB MSZ-EF25VGKS
MSZ-EF35VGKW MSZ-EF35VGKB MSZ-EF35VGKS
MSZ-EF42VGKW MSZ-EF42VGKB MSZ-EF42VGKS
MSZ-EF50VGKW MSZ-EF50VGKB MSZ-EF50VGKS
Installation plate 1
Installation plate xing screw 4 × 25 mm 5
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Soft dry cloth (VGB type only) 1
Air cleaning lter 2
OBH831A

5
Indoor model
MSZ-EF18VGW
MSZ-EF18VGB
MSZ-EF18VGS
MSZ-EF18VGKW
MSZ-EF18VGKB
MSZ-EF18VGKS
MSZ-EF22VGW
MSZ-EF22VGB
MSZ-EF22VGS
MSZ-EF22VGKW
MSZ-EF22VGKB
MSZ-EF22VGKS
MSZ-EF25VGW
MSZ-EF25VGB
MSZ-EF25VGS
MSZ-EF25VGKW
MSZ-EF25VGKB
MSZ-EF25VGKS
MSZ-EF35VGW
MSZ-EF35VGB
MSZ-EF35VGS
MSZ-EF35VGKW
MSZ-EF35VGKB
MSZ-EF35VGKS
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
1Cooling W20
Heating 26 30
Running
current 1Cooling A0.20
Heating 0.26 0.29
Fan motor
Model RC0J40
Current 1Cooling A0.20
Heating 0.26 0.29
Dimensions W × H × D mm 885 × 299 × 195
Weight kg 11.5
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
630
High 498
Med. 378
Low 276
Silent 240
Heating
Super High
m3/h
714 762
High 534
Med. 372
Low 276
Silent 240
Sound level
Cooling
Super High
dB(A)
42
High 36
Med. 29 30
Low 23 24
Silent 19 21
Heating
Super High
dB(A)
45 46
High 37 38
Med. 29 30
Low 24
Silent 21
Fan speed
Cooling
Super High
rpm
1,200
High 990
Med. 800
Low 630
Silent 570
Heating
Super High
rpm
1,330 1,400
High 1,050
Med. 790
Low 630
Silent 570
Fan speed regulator 5
Remote controller model W: SG19A
B,S: SG19B
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
Specifications and rated conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 V DC
Varistor (NR11) 470 V
Terminal block (TB) 3P
OBH831A

6
Specifications and rated conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 V DC
Varistor (NR11) 470 V
Terminal block (TB) 3P
Indoor model
MSZ-EF42VGW
MSZ-EF42VGB
MSZ-EF42VGS
MSZ-EF42VGKW
MSZ-EF42VGKB
MSZ-EF42VGKS
MSZ-EF50VGW
MSZ-EF50VGB
MSZ-EF50VGS
MSZ-EF50VGKW
MSZ-EF50VGKB
MSZ-EF50VGKS
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
1Cooling W23 23
Heating 33 43
Running
current 1Cooling A0.23 0.23
Heating 0.31 0.39
Fan motor
Model RC0J40
Current 1Cooling A0.23 0.23
Heating 0.31 0.39
Dimensions W × H × D mm 885 × 299 × 195
Weight kg 11.5
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
672 678
High 534 552
Med. 462 474
Low 396 408
Silent 348
Heating
Super High
m3/h
792 876
High 594 666
Med. 468 540
Low 378 432
Silent 330 384
Sound level
Cooling
Super High
dB(A)
43 43
High 39 40
Med. 35 36
Low 31 33
Silent 28 30
Heating
Super High
dB(A)
48 49
High 41 43
Med. 35 37
Low 30 33
Silent 28 30
Fan speed
Cooling
Super High
rpm
1,260 1,270
High 1,050 1,080
Med. 930 950
Low 830 850
Silent 750
Heating
Super High
rpm
1,440 1,570
High 1,140 1,250
Med. 940 1,060
Low 800 890
Silent 720 810
Fan speed regulator 5
Remote controller model W: SG19A
B,S: SG19B
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.
OBH831A

7
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
NOISE CRITERIA CURVES
4
MSZ-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW
MSZ-EF18VGB MSZ-EF22VGB MSZ-EF25VGB MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB
MSZ-EF18VGS MSZ-EF22VGS MSZ-EF25VGS MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS
MSZ-EF35VGW MSZ-EF35VGKW
MSZ-EF35VGB MSZ-EF35VGKB
MSZ-EF35VGS MSZ-EF35VGKS
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
OBH831A

8
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
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
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
48
NC-10
MSZ-EF42VGW MSZ-EF42VGKW
MSZ-EF42VGB MSZ-EF42VGKB
MSZ-EF42VGS MSZ-EF42VGKS
MSZ-EF50VGW MSZ-EF50VGKW
MSZ-EF50VGB MSZ-EF50VGKB
MSZ-EF50VGS MSZ-EF50VGKS
OBH831A

9
OUTLINES AND DIMENSIONS
5
MSZ-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF35VGW MSZ-EF42VGW MSZ-EF50VGW
MSZ-EF18VGB MSZ-EF22VGB MSZ-EF25VGB MSZ-EF35VGB MSZ-EF42VGB MSZ-EF50VGB
MSZ-EF18VGS MSZ-EF22VGS MSZ-EF25VGS MSZ-EF35VGS MSZ-EF42VGS MSZ-EF50VGS
Unit: mm
MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW MSZ-EF35VGKW MSZ-EF42VGKW MSZ-EF50VGKW
MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB MSZ-EF35VGKB MSZ-EF42VGKB MSZ-EF50VGKB
MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS MSZ-EF35VGKS MSZ-EF42VGKS MSZ-EF50VGKS
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)
Drain hose Insulation ø28 O.D Connected part ø16 O.D
OBH831A

10
WIRING DIAGRAM
6
MSZ-EF18VGW- E1 MSZ-EF22VGW-
E1 , ET1 MSZ-EF25VGW- E1 , ET1
MSZ-EF35VGW- E1 , ET1 MSZ-EF42VGW-
E1 , ET1 MSZ-EF50VGW- E1 , ET1
MSZ-EF18VGB- E1 MSZ-EF22VGB-
E1 , ET1 MSZ-EF25VGB- E1 , ET1
MSZ-EF35VGB- E1 , ET1 MSZ-EF42VGB-
E1 , ET1 MSZ-EF50VGB- E1 , ET1
MSZ-EF18VGS- E1 MSZ-EF22VGS-
E1 , ET1 MSZ-EF25VGS- E1 , ET1
MSZ-EF35VGS- E1 , ET1 MSZ-EF42VGS-
E1 , ET1 MSZ-EF50VGS- E1 , ET1
OBH831A

11
MSZ-EF18VGW-
E2
MSZ-EF22VGW-
E2
MSZ-EF25VGW-
E2
MSZ-EF35VGW-
E2
MSZ-EF42VGW-
E2
MSZ-EF18VGB-
E2
MSZ-EF22VGB-
E2
MSZ-EF25VGB-
E2
MSZ-EF35VGB-
E2
MSZ-EF42VGB-
E2
MSZ-EF18VGS-
E2
MSZ-EF22VGS-
E2
MSZ-EF25VGS-
E2
MSZ-EF35VGS-
E2
MSZ-EF42VGS-
E2
MSZ-EF22VGW-
ET2
MSZ-EF25VGW-
ET2
MSZ-EF35VGW-
ET2
MSZ-EF42VGW-
ET2
MSZ-EF22VGB-
ET2
MSZ-EF25VGB-
ET2
MSZ-EF35VGB-
ET2
MSZ-EF42VGB-
ET2
MSZ-EF22VGS-
ET2
MSZ-EF25VGS-
ET2
MSZ-EF35VGS-
ET2
MSZ-EF42VGS-
ET2
Terminal bloğu
Konektör
NOTLAR :
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme
kablosu kullanın
3. Sembolleri gösterir
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
TERMİNAL BLOĞU
RÖLE
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
KANAT MOTORU
(YATAY ALT)
KANAT MOTORU
(YATAY ÜST)
RESİSTÖR
PARÇA ADI
DIŞ ÜNİTEYE
GÖSTERGE KARTI
ALICI KARTI
SİVİÇ KARTI
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE ELEKTRONİK
KONTROL KARTI
OBH831A

12
MSZ-EF50VGW- E2
MSZ-EF50VGB- E2
MSZ-EF50VGS- E2
MSZ-EF50VGW- ET2
MSZ-EF50VGB- ET2
MSZ-EF50VGS- ET2
Terminal bloğu
Konektör
NOTLAR :
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme kablosu kullanın
3. Sembolleri gösterir
DIŞ ÜNİTEYE
GÖSTERGE KARTI
ALICI KARTI
SİVİÇ KARTI
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE ELEKTRONİK
KONTROL KARTI
SİGORTA
(T3.15AL250V)
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
TERMİNAL BLOĞU
RÖLE
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
FAN MOTORU
VARİSTÖR
KANAT MOTORU
(YATAY ALT)
KANAT MOTORU
(YATAY ÜST)
REAKTÖR
OBH831A

13
MSZ-EF18VGKW-
E1
MSZ-EF22VGKW-
E1
MSZ-EF25VGKW-
E1
MSZ-EF35VGKW-
E1
MSZ-EF42VGKW-
E1
MSZ-EF18VGKB-
E1
MSZ-EF22VGKB-
E1
MSZ-EF25VGKB-
E1
MSZ-EF35VGKB-
E1
MSZ-EF42VGKB-
E1
MSZ-EF18VGKS-
E1
MSZ-EF22VGKS-
E1
MSZ-EF25VGKS-
E1
MSZ-EF35VGKS-
E1
MSZ-EF42VGKS-
E1
MSZ-EF22VGKW-
ET1
MSZ-EF25VGKW-
ET1
MSZ-EF35VGKW-
ET1
MSZ-EF42VGKW-
ET1
MSZ-EF22VGKB-
ET1
MSZ-EF25VGKB-
ET1
MSZ-EF35VGKB-
ET1
MSZ-EF42VGKB-
ET1
MSZ-EF22VGKS-
ET1
MSZ-EF25VGKS-
ET1
MSZ-EF35VGKS-
ET1
MSZ-EF42VGKS-
ET1
DIŞ ÜNİTEYE
GÖSTERGE KARTI
ALICI KARTI
SİVİÇ KARTI
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE ELEKTRONİK
KONTROL KARTI
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
TERMİNAL BLOĞU
RÖLE
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
KANAT MOTORU
(YATAY ALT)
KANAT MOTORU
(YATAY ÜST)
RESİSTÖR
PARÇA ADI
Wİ-Fİ
ARAYÜZÜ
Terminal bloğu
Konektör
NOTLAR :
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme kablosu kullanın
3. Sembolleri gösterir
OBH831A

14
MSZ-EF50VGKW- E1
MSZ-EF50VGKB- E1
MSZ-EF50VGKS- E1
MSZ-EF50VGKW- ET1
MSZ-EF50VGKB- ET1
MSZ-EF50VGKS- ET1
Terminal bloğu
Konektör
NOTLAR :
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme kablosu kullanın
3. Sembolleri gösterir
DIŞ ÜNİTEYE
GÖSTERGE KARTI
ALICI KARTI
SİVİÇ KARTI
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE ELEKTRONİK
KONTROL KARTI
Wİ-Fİ
ARAYÜZÜ
SİGORTA
(T3.15AL250V)
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
TERMİNAL BLOĞU
RÖLE
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
FAN MOTORU
VARİSTÖR
KANAT MOTORU
(YATAY ALT)
KANAT MOTORU
(YATAY ÜST)
REAKTÖR
OBH831A

15
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø9.52
(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-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF35VGW MSZ-EF42VGW MSZ-EF50VGW
MSZ-EF18VGB MSZ-EF22VGB MSZ-EF25VGB MSZ-EF35VGB MSZ-EF42VGB MSZ-EF50VGB
MSZ-EF18VGS MSZ-EF22VGS MSZ-EF25VGS MSZ-EF35VGS MSZ-EF42VGS MSZ-EF50VGS
MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW MSZ-EF35VGKW MSZ-EF42VGKW MSZ-EF50VGKW
MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB MSZ-EF35VGKB MSZ-EF42VGKB MSZ-EF50VGKB
MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS MSZ-EF35VGKS MSZ-EF42VGKS MSZ-EF50VGKS
OBH831A

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8-1. TIMER SHORT MODE
For service, the following set time can be shortened by bridging JPG and JPS/the timer short mode point* on the elec-
tronic control P.C. board. (Refer to 10-7.)
• The set time for the ON/OFF timer can be reduced to 1 second for each minute.
• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to 1
minute. Restarting the compressor, which takes 3 minutes, cannot be reduced.
SERVICE FUNCTIONS
8
MSZ-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF35VGW MSZ-EF42VGW MSZ-EF50VGW
MSZ-EF18VGB MSZ-EF22VGB MSZ-EF25VGB MSZ-EF35VGB MSZ-EF42VGB MSZ-EF50VGB
MSZ-EF18VGS MSZ-EF22VGS MSZ-EF25VGS MSZ-EF35VGS MSZ-EF42VGS MSZ-EF50VGS
MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW MSZ-EF35VGKW MSZ-EF42VGKW MSZ-EF50VGKW
MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB MSZ-EF35VGKB MSZ-EF42VGKB MSZ-EF50VGKB
MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS MSZ-EF35VGKS MSZ-EF42VGKS MSZ-EF50VGKS
8-2. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT
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.
This setting can be set only when all the following conditions are met:
• The remote controller is powered OFF.
• Weekly timer is not set.
• Weekly timer is not being edited.
(1) Hold down button on the remote controller for 2 seconds to enter the pairing mode.
(2) Press button again and assign a number to each remote controller.
Each press of button advances the number in the following order: 1 → 2 → 3 → 4.
(3) Press button to complete the pairing setting.
After you turn the breaker ON, the remote controller that first sends a signal to an indoor unit will be regarded as the
remote controller for the indoor unit.
Once they are set, the indoor unit will only receive the signal from the assigned remote controller afterwards.
* JPG and JPS: MSZ-EF∙VG- E1 , ET1
Timer short mode point: MSZ-EF∙VG- E2 , ET2 , MSZ-EF-VGK- E1 , ET1
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8-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed
are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in
the same mode just before the shutoff of the main power.
Operation
If the main power has been cut, the operation settings remain.
After the power is restored, the unit restarts automatically according to the memory.
(However, it takes at least 3 minutes for the compressor to start running.)
How to disable “AUTO RESTART FUNCTION”
Turn off the main power for the unit.
Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 10-7.)
NOTE:
• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-
celled.
• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the
power button of the remote controller is OFF.
• To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the same
time.
• When some air conditioners are connected to the same supply system, if they are operated before power failure, the
starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current
by adding to the system that allows the units to start one by one.
JR77
IC171
CN104CN112
BZ
Indoor electronic
control P.C. board
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8-4. Wi-Fi INTERFACE SETTING UP (MSZ-EF∙VGKW/B/S)
3
4
5
6
21
• Ensure that the Router supports the WPA2-AES encryption setting before
starting the Wi-Fi interface setup.
• The End user should read and accept the terms and conditions of the Wi-Fi
service before using this Wi-Fi interface.
• To complete connection of this Wi-Fi interface to the Wi-Fi service, the Rout-
er may be required.
• This Wi-Fi interface will not commence transmission of any operational data
from the system until the End user registers and accepts the terms and con-
ditions of the Wi-Fi service.
• This Wi-Fi interface should not be installed and connected to any Mitsubishi
Electric system which is to provide application critical cooling or heating.
• At the time of relocation or disposal, reset the Wi-Fi interface to the factory
default.
ERR
NET
MODE
UNIT
RESET MODE
Wi-Fi INTERFACE
MODEL
XXXXXXXX
MAC
ID
SSID
KEY
: XXXXXXXXXXXX
: XXXXXXXXXX
: XXXXXXXXXXXX
: XXXXXXXXXXXX
VOLTAGE
CURRENT:
:
MITSUBISHI ELECTRIC CORPRATION
WiFi.ASSY DWG No.
XXXXXXXXXXX
MADE IN CHINA
XXXXXXXXXX
>PP<
3
4
5
6
1
2
This Wi-Fi interface communicates the status information and controls
the commands from the MELCloud by connecting to an indoor unit.
(1) MODE switch
• The MODE switch is used for selecting modes in configurations.
(2) RESET switch
• Hold down the RESET switch for 2 seconds to reboot the system.
• Hold down the RESET switch for 14 seconds to initialize the Wi-Fi interface to
the factory default.
(1) Open the front panel and remove the Wi-Fi interface.
(2) Set up a connection between the Wi-Fi interface and the router.
Refer to the SETUP MANUAL and SETUP QUICK
REFERENCE GUIDE provided with the unit.
For SETUP MANUAL, please go to the website below.
http://www.melcloud.com/Support
(3) Put the Wi-Fi interface back and close the front panel
after the setup is completed.
(4) For MELCloud User Manual, please go to the website below.
http://www.melcloud.com/Support
NOTE:
Mitsubishi Electric’s Wi-Fi interface is designed for communication to Mit-
subishi Electric’s MELCloud Wi-Fi service.
Third party Wi-Fi interfaces cannot be connected to MELCloud.
Mitsubishi Electric is not responsible for any (i) under performance of a sys-
tem or any product;(ii) system or product fault; or (iii) loss or damage to any
system or product; which is caused by or arises from connection to and/or use
of any third party Wi-Fi interface or any third party Wi-Fi service with Mitsubishi
Electric equipment.
For the latest information regarding MELCloud from Mitsubishi Electric
Corporation, please visit www.MELCloud.com.
NOTE:
When the Wi-Fi interface is reset to the factory default, ALL the configuration
information will be lost. Take great care in implementing this operation.
No. Item Description
1 MODE switch It selects modes.
2 RESET switch It resets the system and ALL settings.
3 ERR LED (Orange) It shows the network error state.
4 NET LED (Green) It shows the network state.
5 MODE LED (Orange) It shows the Access point mode state.
6 UNIT LED (Green) It shows the indoor unit state.
Wi-Fi interface introduction
Wi-Fi interface
Front panel
Wi-Fi interface
Front panel
OBH831A

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WIRELESS REMOTE CONTROLLER
MICROPROCESSOR CONTROL
9
MSZ-EF18VGW MSZ-EF22VGW MSZ-EF25VGW MSZ-EF35VGW MSZ-EF42VGW MSZ-EF50VGW
MSZ-EF18VGB MSZ-EF22VGB MSZ-EF25VGB MSZ-EF35VGB MSZ-EF42VGB MSZ-EF50VGB
MSZ-EF18VGS MSZ-EF22VGS MSZ-EF25VGS MSZ-EF35VGS MSZ-EF42VGS MSZ-EF50VGS
MSZ-EF18VGKW MSZ-EF22VGKW MSZ-EF25VGKW MSZ-EF35VGKW MSZ-EF42VGKW MSZ-EF50VGKW
MSZ-EF18VGKB MSZ-EF22VGKB MSZ-EF25VGKB MSZ-EF35VGKB MSZ-EF42VGKB MSZ-EF50VGKB
MSZ-EF18VGKS MSZ-EF22VGKS MSZ-EF25VGKS MSZ-EF35VGKS MSZ-EF42VGKS MSZ-EF50VGKS
Operation Indicator lamp
The operation indicator at the right side of the indoor unit indicates the operation state.
•The following indication applies regardless of shape of the indication.
Indication Operation state Room temperature
The unit is operating to
reach the set temperature About 2°C or more away from set temperature
The room temperature is approaching the set tem-
perature About 1 to 2°C from set
temperature
Standby mode (Only during multi system
operation)
-
INDOOR UNIT DISPLAY SECTION
Lit
Blinking
Not lit
Signal transmitting section
Operation display section
Temperature buttons
STOP/OPERATE
(OFF/ON) button
Indication of
remote controller
model is on back
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
CLOCK SET button
WEEKLY TIMER
set button
TIME, TIMER set buttons
FORWARD button
BACKWARD button
RESET button
i save button
VANE CONTROL button
NOTE: Last setting will be stored after the unit is turned OFF with the remote con-
troller. Indoor unit receives the signal of the remote controller with beeps.
OBH831A

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9-2. DRY ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select DRY mode with OPERATION SELECT button.
(3) The set temperature is determined from the initial room temperature.
1. Coil frost prevention
Coil frost prevention works the same way as that in COOL mode. (9-1.1.)
2. Low outside temperature operation
Low outside temperature operation works the same way as that in COOL mode. (9-1.2.)
3. Indoor fan speed control
Indoor fan speed control works the same way as that in COOL mode. (9-1.3.)
9-3. FAN ( ) OPERATION
(1) OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select FAN mode with OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates.
Outdoor unit does not operate.
9-4. HEAT ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select HEAT mode with OPERATION SELECT button.
(3) Press TEMPERATURE buttons TEMP or button to select the desired temperature. The setting range is 16 - 31°C.
1. Cold air prevention control
When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room tem-
perature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.
2. High pressure protection
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con-
densing pressure from increasing excessively.
When the temperature of indoor heat exchanger becomes too high, the high pressure protection works.
The indoor fan operates following the cold air prevention control. This mode continues until the temperature of indoor
heat exchanger falls.
3. Defrosting
Defrosting starts when the temperature of outdoor heat exchanger becomes too low.
The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts.
This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.
9-1. COOL ( ) OPERATION
(1) Press / STOP/OPERATE (OFF/ON) 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 or button to select the desired temperature. The setting range is 16 - 31°C.
1. Coil frost prevention
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil
from frosting.
When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor
heat exchanger rises.
2. Low outside temperature operation
When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.
3. Indoor fan speed control
When the thermostat turns OFF, the indoor fan operates very Low to reduce power consumption.
When the room temperature rises and the thermostat is ON, the indoor fan operates according to the settings on the
remote controller.
OBH831A