Mitsubishi Electric MSZ-AP71VG-E3 User manual

1
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB788)
No. OBH788
REVISED EDITION-E
Outdoor unit service manual
MUZ-AP∙VG/VGH Series (OBH789)
MXZ-D∙VA/VAH Series (OBH626)
MXZ-E∙VA/VAH Series (OBH723)
MXZ-F∙VF/VFH Series (OBH790)
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 ··································· 11
7. REFRIGERANT SYSTEM DIAGRAM··········· 21
8. SERVICE FUNCTIONS······························22
9. MICROPROCESSOR CONTROL ················24
10. TROUBLESHOOTING ·······························32
11. DISASSEMBLY INSTRUCTIONS·················48
MSZ-AP25VG
MSZ-AP35VG
MSZ-AP42VG
MSZ-AP50VG
MSZ-AP25VGK
MSZ-AP35VGK
MSZ-AP42VGK
MSZ-AP50VGK
Models
MSZ-AP25VG - E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
,
E3
,
ET3
MSZ-AP35VG - E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
,
E3
,
ET3
MSZ-AP42VG - E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
,
E3
,
ET3
MSZ-AP50VG - E1
,
EN1
,
ET1
,
ER1
,
E2
,
EN2
,
ET2
,
E3
,
ET3
MSZ-AP60VG - E1
,
ET1
,
ER1
,
E2
,
ET2
,
E3
,
ET3
MSZ-AP71VG - E1
,
ET1
,
ER1
,
E2
,
ET2
,
E3
,
ET3
MSZ-AP25VGK - E1 , EN1 , ET1 , ER1 ,E2 , EN2 , ET2 , ER2 ,E3 , EN3 , ET3 , ER3
MSZ-AP35VGK - E1 , EN1 , ET1 , ER1 ,E2 , EN2 , ET2 , ER2 ,E3 , EN3 , ET3 , ER3
MSZ-AP42VGK - E1 , EN1 , ET1 , ER1 ,E2 , EN2 , ET2 , ER2 ,E3 , EN3 , ET3 , ER3
MSZ-AP50VGK - E1 , EN1 , ET1 , ER1 ,E2 , EN2 , ET2 , ER2 ,E3 , EN3 , ET3 , ER3
MSZ-AP60VGK - E1 , ET1 , ER1 , E2 , ET2 , ER2 , E3 , ET3 , ER3
MSZ-AP71VGK - E1 , ET1 , ER1 , E2 , ET2 , ER2 , E3 , ET3 , ER3
OBH788 REVISED EDITION-D is void.
Revision E:
• MSZ-AP25/35/42/50/60/71VG - E3 , ET3 ,
MSZ-AP25/35/42/50/60/71VGK - E3 ,
ET3 , ER3 and MSZ-AP25/35/42/50VGK -
EN3 have been added.

2
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-AP25/35/42/50VG- ET1 and MSZ-AP25/35/42/50VGK- ET1 have been added.
Revision B:
• MSZ-AP25/35/42VG- ER1 , MSZ-AP25/35/42VGK- ER1 , MSZ-AP60/71VG- E1 , ET1 and MSZ-AP60/71VGK- E1 , ET1 have
been added.
Revision C:
• MSZ-AP25/35/42VG- E2 , EN2 , ET2 , MSZ-AP25/35/42VGK- E2 , EN2 , ET2 , MSZ-AP50VG- ER1 , E2 , EN2 , ET2 , MSZ-
AP50VGK- ER1 , E2 , EN2 , ET2 , MSZ-AP60/71VG- ER1 , E2 , ET2 , MSZ-AP60/71VGK- ER1 , E2 , ET2 , have been added.
Revision D:
• MSZ-AP25/35/42/50/60/71VGK- ER2 have been added.
<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 pull 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.
Revision E:
• MSZ-AP25/35/42/50/60/71VG - E3 , ET3 , MSZ-AP25/35/42/50/60/71VGK - E3 , ET3 , ER3 and MSZ-AP25/35/42/50VGK -
EN3 have been added.
WARNING
• When the refrigeration circuit has a leak, do not execute pump down with the
compressor.
• When pumping down the refrigerant, stop the compressor before disconnecting the
refrigerant pipes. The compressor may burst if air etc. get into it.
• When opening or closing the valve below freezing temperatures, refrigerant may
spurt out from the gap between the valve stem and the valve body, resulting in injuries.
OBH788E

3
1
MSZ-AP25VG - E1 , EN1 , ET1 , ER1
MSZ-AP35VG - E1 , EN1 , ET1 , ER1
MSZ-AP42VG - E1 , EN1 , ET1 , ER1
MSZ-AP50VG - E1 , EN1 , ET1 , ER1
MSZ-AP25VGK - E1 , EN1 , ET1 , ER1
MSZ-AP35VGK - E1 , EN1 , ET1 , ER1
MSZ-AP42VGK - E1 , EN1 , ET1 , ER1
MSZ-AP50VGK - E1 , EN1 , ET1 , ER1
MSZ-AP60VG - E1 , ET1 , ER1
MSZ-AP71VG - E1 , ET1 , ER1
MSZ-AP60VGK - E1 , ET1 , ER1
MSZ-AP71VGK - E1 , ET1 , ER1
1. New model
MSZ-AP25VG - E1 , EN1 , ET1 E2 , EN2 , ET2
MSZ-AP35VG - E1 , EN1 , ET1 E2 , EN2 , ET2
MSZ-AP42VG - E1 , EN1 , ET1 E2 , EN2 , ET2
MSZ-AP50VG - E1 , EN1 , ET1 E2 , EN2 , ET2
MSZ-AP25VGK - E1 , EN1 , ET1 , ER1 E2 , EN2 , ET2 , ER2
MSZ-AP35VGK - E1 , EN1 , ET1 , ER1 E2 , EN2 , ET2 , ER2
MSZ-AP42VGK - E1 , EN1 , ET1 , ER1 E2 , EN2 , ET2 , ER2
MSZ-AP50VGK - E1 , EN1 , ET1 , ER1 E2 , EN2 , ET2 , ER2
MSZ-AP60VG - E1 , ET1 E2 , ET2
MSZ-AP71VG - E1 , ET1 E2 , ET2
MSZ-AP60VGK - E1 , ET1 , ER1 E2 , ET2 , ER2
MSZ-AP71VGK - E1 , ET1 , ER1 E2 , ET2 , ER2
1. Remote controller has been changed.
2. Wi-Fi interface has been changed.
MSZ-AP25VG - E2 , ET2 E3 , ET3
MSZ-AP35VG - E2 , ET2 E3 , ET3
MSZ-AP42VG - E2 , ET2 E3 , ET3
MSZ-AP50VG - E2 , ET2 E3 , ET3
MSZ-AP25VGK - E2 , EN2 , ET2 , ER2 E3 , EN3 , ET3 , ER3
MSZ-AP35VGK - E2 , EN2 , ET2 , ER2 E3 , EN3 , ET3 , ER3
MSZ-AP42VGK - E2 , EN2 , ET2 , ER2 E3 , EN3 , ET3 , ER3
MSZ-AP50VGK - E2 , EN2 , ET2 , ER2 E3 , EN3 , ET3 , ER3
MSZ-AP60VG - E2 , ET2 E3 , ET3
MSZ-AP71VG - E2 , ET2 E3 , ET3
MSZ-AP60VGK - E2 , ET2 , ER2 E3 , ET3 , ER3
MSZ-AP71VGK - E2 , ET2 , ER2 E3 , ET3 , ER3
1. New air cleaning filter has been added.
TECHNICAL CHANGES
These models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-AP·VG/VGH series outdoor units enables the low standby power control.
These models may be connected to the MUZ-AP·VG/VGH series after once connected to the MXZ series and operated, for
example because of relocation. In that case, the MUZ-AP·VG/VGH series outdoor units will not operate without taking a step.
Follow the procedure "Deleting the memorized abnormal condition" described in 10-2.1.
OBH788E

4
ACCESSORIES
MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG
MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK
Model
MSZ-AP25VG - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2
MSZ-AP35VG - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2
MSZ-AP42VG - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2
MSZ-AP50VG - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2
MSZ-AP25VGK - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2 ,ER2
MSZ-AP35VGK - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2 ,ER2
MSZ-AP42VGK - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2 ,ER2
MSZ-AP50VGK - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2 ,ER2
MSZ-AP25VG - E3 ,ET3
MSZ-AP35VG - E3 ,ET3
MSZ-AP42VG - E3 ,ET3
MSZ-AP50VG - E3 ,ET3
MSZ-AP25VGK - E3 ,EN3 ,ET3 ,ER3
MSZ-AP35VGK - E3 ,EN3 ,ET3 ,ER3
MSZ-AP42VGK - E3 ,EN3 ,ET3 ,ER3
MSZ-AP50VGK - E3 ,EN3 ,ET3 ,ER3
(1) Installation plate 1 1
(2) Installation plate xing
screw 4 × 25 mm 5 5
(3) Wireless remote con-
troller 1 1
(4) Felt tape (For left or
left-rear piping) 1 1
(5) Battery (AAA) for re-
mote controller 2 2
(6) Air cleaning lter - 2
Operation indicator lamp
Remote control receiving
section
Air inlet
Front panel
Air outlet
Spec name plate
Air filter
Horizontal vane Emergency
operation switch
Wi-Fi interface
MSZ-AP·VGK
Heat exchanger
Fan guard
Air cleaning filter
(V Blocking Filter)
Operation indicator lamp
Remote control receiving
section
Air cleaning filter
(Silver-ionized air
purifier filter, option)
MSZ-AP·VG - E3 , ET3
MSZ-AP·VGK - E3 , EN3 , ET3 , ER3 )
Remote controller
PART NAMES AND FUNCTIONS
2
OBH788E

5
Remote controller
ACCESSORIES
MSZ-AP60VG MSZ-AP71VG
MSZ-AP60VGK MSZ-AP71VGK
Model
MSZ-AP60VG - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2
MSZ-AP71VG - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2
MSZ-AP60VGK - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2 ,ER2
MSZ-AP71VGK - E1 ,EN1 ,ET1 ,ER1 ,E2 ,EN2 ,ET2 ,ER2
MSZ-AP60VG - E3 ,ET3
MSZ-AP71VG - E3 ,ET3
MSZ-AP60VGK - E3 ,ET3 ,ER3
MSZ-AP71VGK - E3 ,ET3 ,ER3
(1) Installation plate 1 1
(2) Installation plate xing
screw 4 × 25 mm 7 7
(3) Wireless remote con-
troller 1 1
(4) Felt tape (For left or
left-rear piping) 1 1
(5) Battery (AAA) for re-
mote controller 2 2
(6) Air cleaning lter - 2
Operation indicator lamp
Remote control receiving
section
MSZ-AP·VG - E3 , ET3
MSZ-AP·VGK - E3 , ET3 , ER3
Emergency operation
switch
Horizontal vane
Air inlet
Front panel
Air outlet
Wi-Fi interface
MSZ-AP·VGK
Heat exchanger
Spec name plate
Air filter
Fan guard
Air cleaning filter
(V Blocking Filter)
Air cleaning filter
(Silver-ionized air
purifier filter, option)
OBH788E

6
Specifications and rated conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV1, MV2) 12 V DC
Vertical vane motor (MV3)
Varistor (NR11) 470 V
Terminal block (TB) 3P
Indoor model MSZ-AP25VG
MSZ-AP25VGK
MSZ-AP35VG
MSZ-AP35VGK
MSZ-AP42VG
MSZ-AP42VGK
MSZ-AP50VG
MSZ-AP50VGK
Power supply Single phase 230 V, 50 Hz
Electrical data
Power
input *1 Cooling W19 24
Heating 26 32
Running
current *1 Cooling A0.18 0.24
Heating 0.26 0.32
Fan motor
Model RC0J30-CV
Current *1 Cooling A0.18 0.24
Heating 0.26 0.32
Dimensions W × H × D mm 798 × 299 × 219
Weight kg 10.5
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
684 756
High 522 558 600
Med. 426 462 504
Low 354 390 432
Silent 294 324 360
Heating
Super High
m3/h
774 840
High 534 564 600
Med. 438 462 492
Low 354 366 390
Silent 294 318 336
Sound level
Cooling
Super High
dB(A)
42 44
High 36 38 40
Med. 30 34 36
Low 24 29 33
Silent 19 21 28
Heating
Super High
dB(A)
45 48
High 39 38 40 43
Med. 34 31 35 38
Low 24 29 33
Silent 19 21 28
Fan speed
Cooling
Super High
rpm
970 1,050
High 790 830 880
Med. 670 720 770
Low 580 630 680
Silent 500 540 590
Heating
Super High
rpm
1,070 1,140
High 800 840 880
Med. 690 720 750
Low 580 600 630
Silent 500 530 560
Fan speed regulator 5
Remote controller
model
E1 ,EN1 ,ET1 ,ER1 SG17B
E2 ,EN2 ,ET2 ,ER2
E3 ,ET3 SH20A
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 Wet-bulb temperature 24°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
OBH788E

7
Indoor model MSZ-AP60VG
MSZ-AP60VGK
MSZ-AP71VG
MSZ-AP71VGK
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
*1 Cooling W41 42
Heating 49 45
Running
current *1 Cooling A0.37 0.38
Heating 0.43 0.40
Fan motor
Model RC0J56-AH
Current *1 Cooling A0.37 0.38
Heating 0.43 0.40
Dimensions W × H × D mm 1100 × 325 × 257
Weight kg 16 17
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
1,134 1,116
High 960 918
Med. 792
Low 660 690
Quiet 564 576
Heating
Super High
m3/h
1,218 1,152
High 1,044 918
Med. 924 792
Low 804 690
Quiet 648 612
Sound level
Cooling
Super High
dB(A)
48 49
High 45
Med. 41
Low 37
Quiet 29 30
Heating
Super High
dB(A)
48 51
High 45
Med. 41
Low 37
Quiet 30
Fan speed
Cooling
Super High
rpm
1,100 1,140
High 960 970
Med. 820 860
Low 710 770
Quiet 630 670
Heating
Super High
rpm
1,170
High 1,030 970
Med. 930 860
Low 830 770
Quiet 700
Fan speed regulator 5
Remote controller
model
E1 ,EN1 ,ET1 ,ER1 SG18D
E2 ,EN2 ,ET2 ,ER2
E3 ,EN3 ,ET3 ,ER3 SH20C
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 Wet-bulb temperature 24°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.
Specifications and rated conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV1) 12 V DC
Vertical vane motor (MV2)
Varistor (NR11) 470 V
Terminal block (TB) 3P
OBH788E

8
MSZ-AP25VG
MSZ-AP25VGK
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
MSZ-AP35VG
MSZ-AP35VGK
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
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-AP42VG
MSZ-AP42VGK
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
44
48
NC-10
MSZ-AP50VG
MSZ-AP50VGK
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
OBH788E

9
MSZ-AP71VG
MSZ-AP71VGK
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
49
51
NC-10
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
HEATING
48
48
NC-10
MSZ-AP60VG
MSZ-AP60VGK
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
OBH788E

10
Unit: mm
E1 ET1 ER1 E2 ET2
EN1 EN2
193
60 19
62750 121
299
408
1440
51
86 86225 225
168 145
33135247 68
43 214
44 213
255
22
256
233
798
5
219
4
87
124
129
100
MIN 39mm
MIN 20mm MIN 40mm
MIN 7mm
AIR OUT
AIR IN INSTALLATION PLATE
DRAIN HOSE
INSTALLATION PLATE 11×20 OBLONG HOLE
11×26 OBLONG HOLE
INDOOR UNIT
PIPING
IN CASE OF LEFT, LEFT BACK,OR LEFT UNDER PIPING (USING SPACER), MIN 116mm
WALL HOLE 65
EN1 EN2
PIPING
INSULATION
LIQUID LINE
GAS LINE
DRAIN HOSE
PIPING
INSULATION
LIQUID LINE
GAS LINE
DRAIN HOSE
Ø37 O.D
Ø6.35 - 0.39m (FLARED CONNECTION Ø6.35)
Ø9.52 - 0.34m (FLARED CONNECTION Ø9.52)
INSULATION Ø29 CONNECTED PART Ø16 O.D
Ø37 O.D
Ø6.35 - 0.5m (FLARED CONNECTION Ø6.35)
Ø9.52 - 0.45m (FLARED CONNECTION Ø9.52)
INSULATION Ø29 CONNECTED PART Ø16 O.D
E1 ET1 ER1 E2 ET2 ER2 E3 ET3E3 ET3 ER3
EN3
(MSZ-AP25/35/42/50VG-
MSZ-AP25/35/42/50VGK-
MSZ-AP25/35/42/50VGK- )
(MSZ-AP25/35/42/50VG-
)
OUTLINES AND DIMENSIONS
5
MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG
MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK
MSZ-AP60VG MSZ-AP71VG
MSZ-AP60VGK MSZ-AP71VGK
OBH788E