Mitsubishi Electric MSZ-AP20VG-E3 User manual

INDOOR UNIT
SERVICE MANUAL
Outdoor unit service manual
MUZ-AP∙VG Series (OBH839)
MXZ-D∙VA Series (OBH626)
MXZ-E∙VA Series (OBH723)
MXZ-F∙VF Series (OBH790)
PARTS CATALOG (OBB838)
MSZ-AP15VG
MSZ-AP20VG
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES··························6
5. OUTLINES AND DIMENSIONS·····················7
6. WIRING DIAGRAM ·····································8
7. REFRIGERANT SYSTEM DIAGRAM ··········· 11
8. SERVICE FUNCTIONS······························12
9. MICROPROCESSOR CONTROL ················14
10. TROUBLESHOOTING ·······························21
11. DISASSEMBLY INSTRUCTIONS·················35
No. OBH838
REVISED EDITION-C
OBH838 REVISED EDITION-B is void.
Revision C:
• MSZ-AP15/20VG - E3 , ET3 and
MSZ-AP15/20VGK - E2 , ET2, ER2 have
been added.
Models
MSZ-AP15VG -E1 , ET1 , ER1 , E2 , ET2 , E3 , ET3
MSZ-AP20VG -E1 , ET1 , ER1 , E2 , ET2 , E3 , ET3
MSZ-AP15VGK -E1 , ET1 , ER1 , E2 , ET2 , ER2
MSZ-AP20VGK -E1 , ET1 , ER1 , E2 , ET2 , ER2

2
Use the specified 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.
<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 A:
• MSZ-AP15/20VG - ER1 have been added.
Revision B:
• MSZ-AP15/20VG - E2 , ET2 and MSZ-AP15/20VGK - E1 , ET1, ER1 have been added.
Revision C:
• MSZ-AP15/20VG - E3 , ET3 and MSZ-AP15/20VGK - E2 , ET2, ER2 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.
OBH838C

3
TECHNICAL CHANGES
1
MSZ-AP15VG - E1 , ET1 , ER1
MSZ-AP20VG - E1 , ET1 , ER1
MSZ-AP15VGK - E1 , ET1 , ER1
MSZ-AP20VGK - E1 , ET1 , ER1
1. New model
MSZ-AP15VG - E1 , ET1 MSZ-AP15VG - E2 , ET2
MSZ-AP20VG - E1 , ET1 MSZ-AP20VG - E2 , ET2
1. Remote controller has been changed.
MSZ-AP15VG - E2 , ET2 MSZ-AP15VG - E3 , ET3
MSZ-AP20VG - E2 , ET2 MSZ-AP20VG - E3 , ET3
MSZ-AP15VGK - E1 , ET1 , ER1 MSZ-AP15VGK - E2 , ET2 , ER2
MSZ-AP20VGK - E1 , ET1 , ER1 MSZ-AP20VGK - E2 , ET2 , ER2
1. New air cleaning filter has been added.
These models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-AP·VG series outdoor units enables the low standby power control.
These models may be connected to the MUZ-AP·VG series after once connected to the MXZ series and operated, for exam-
ple because of relocation. In that case, the MUZ-AP·VG series outdoor units will not operate without taking a step. Follow the
procedure "Deleting the memorized abnormal condition" described in 10-2.1.
OBH838C

4
ACCESSORIES
Model MSZ-AP15/20VG - E1 , ET1 , ER1 ,E2 , ET2
MSZ-AP15/20VGK - E1 , ET1 , ER1
MSZ-AP15/20VG - E3 , ET3
MSZ-AP15/20VGK - E2 , ET2 , ER2
(1) Installation plate 1 1
(2) Installation plate xing
screw 4 × 25 mm 5 5
(3) Wireless remote controller 1 1
(4) Felt tape (For left or left-
rear piping) 1 1
(5) Battery (AAA) for (3) 2 2
(6) Air cleaning lter - 2
MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK
PART NAMES AND FUNCTIONS
2
Remote controller
Operation
indicator lamp
Remote control
receiving section
Horizontal vane
Air outlet
Air filter
Heat exchanger Emergency
operation switch
Front panel
Wi-Fi interface
Air inlet
MSZ-AP·VGK
Fan guard
Spec name plate
Air cleaning filter
(V Blocking Filter)
MSZ-AP·VG - E3 , ET3
MSZ-AP·VGK - E2 , ET2 , ER2
OBH838C

5
Indoor model MSZ-AP15VG
MSZ-AP15VGK
MSZ-AP20VG
MSZ-AP20VGK
Power supply Single phase 230 V, 50 Hz
Electrical data
Power
input *1 Cooling W17 19
Heating 17 19
Running
current *1 Cooling A0.17 0.19
Heating 0.17 0.19
Fan motor
Model RC0J30-CW
Current *1 Cooling A0.17 0.19
Heating 0.17 0.19
Dimensions W × H × D mm 760 × 250 × 178
Weight kg 8.2
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
384 414
High 330 330
Med. 276 276
Low 234 234
Silent 210
Heating
Super High
m3/h
408 438
High 360
Med. 300
Low 264
Silent 222
Sound level
Cooling
Super High
dB(A)
40 42
High 35
Med. 30
Low 26
Silent 21
Heating
Super High
dB(A)
40 42
High 35
Med. 30
Low 26
Silent 21
Fan speed
Cooling
Super High
rpm
1,430 1,530
High 1,250 1,250
Med. 1,080 1,080
Low 940 940
Silent 860
Heating
Super High
rpm
1,430 1,530
High 1,290
Med. 1,110
Low 990
Silent 870
Fan speed regulator 5
Remote
controller model VG - E1 ,ET1 ,ER1 SG19C
Others SH20B
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.
Specifications and rating conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 V DC
Varistor (NR11) 470 V
Terminal block (TB) 3P
SPECIFICATION
3
OBH838C