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.

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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

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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

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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