Mitsubishi Electric MSZ-AY25VG-ET1 User manual

Models
MSZ-AY25VG -ET1
MSZ-AY35VG -ET1
MSZ-AY42VG -ET1
MSZ-AY50VG -ET1
MSZ-AY25VGK -E1 , SC1 , ET1 , ER1
MSZ-AY35VGK -E1 , SC1 , ET1 , ER1
MSZ-AY42VGK -E1 , SC1 , ET1 , ER1
MSZ-AY50VGK -E1 , SC1 , ET1 , ER1
MSZ-AY25VGKP -E1 , SC1 , ET1 , ER1
MSZ-AY35VGKP -E1 , SC1 , ET1 , ER1
MSZ-AY42VGKP -E1 , SC1 , ET1 , ER1
MSZ-AY50VGKP -E1 , SC1 , ET1 , ER1
SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB932)
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 ···········13
8. SERVICE FUNCTIONS······························14
9. MICROPROCESSOR CONTROL·················20
10. TROUBLESHOOTING·······························30
11. DISASSEMBLY INSTRUCTIONS·················45
Outdoor unit service manual
MUZ-AY∙VG/VGH Series (OBH931)
MXZ-F∙VF/VFH Series (OBH790)
No. OBH932

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.
<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.
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.
OBH932

3
TECHNICAL CHANGES1
These models are compatible with the outdoor units with low standby power control.
Connecting these models to the MUZ-AY·VG/VGH series outdoor units enables the low standby power control.
These models may be connected to the MUZ-AY·VG/VGH series after once connected to the MXZ series and operated, for
example because of relocation. In that case, the MUZ-AY·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.
MSZ-AY25VG - ET1
MSZ-AY35VG - ET1
MSZ-AY42VG - ET1
MSZ-AY50VG - ET1
MSZ-AY25VGK - E1 , SC1, ET1 , ER1
MSZ-AY35VGK - E1 , SC1, ET1 , ER1
MSZ-AY42VGK - E1 , SC1, ET1 , ER1
MSZ-AY50VGK - E1 , SC1, ET1 , ER1
MSZ-AY25VGKP - E1 , SC1, ET1 , ER1
MSZ-AY35VGKP - E1 , SC1, ET1 , ER1
MSZ-AY42VGKP - E1 , SC1, ET1 , ER1
MSZ-AY50VGKP - E1 , SC1, ET1 , ER1
1. New model
OBH932

4
PART NAMES AND FUNCTIONS2
ACCESSORIES
MSZ-AY25VG MSZ-AY35VG MSZ-AY42VG MSZ-AY50VG
MSZ-AY25VGK MSZ-AY35VGK MSZ-AY42VGK MSZ-AY50VGK
MSZ-AY25VGKP MSZ-AY35VGKP MSZ-AY42VGKP MSZ-AY50VGKP
Model MSZ-AY25VG MSZ-AY35VG MSZ-AY42VG MSZ-AY50VG MSZ-AY25VGK MSZ-AY35VGK MSZ-AY42VGK MSZ-AY50VGK
MSZ-AY25VGKP MSZ-AY35VGK PMSZ-AY42VGK PMSZ-AY50VGKP
(1) Installation plate 1
(2) Installation plate xing screw 4 × 25 mm 5
(3) Wireless remote controller 1
(4) Felt tape (For left or left-rear piping) 1
(5) Battery (AAA) for remote controller 2
(6) Air cleaning lter 2 (VG and VGK only)
Emergency operation switch
Operation indicator lamp
Air purifying lamp (VGKP type only)
Remote control receiving
section
Horizontal vane
Air filter
Front panel
Spec name plate *1
Heat exchanger
Fan guard
Air outlet
Air cleaning filter
(V Blocking Filter)
(VG and VGK only)
Air purifying device
(VGKP type only)
Wi-Fi interface
(VGK and VGKP only)
Air inlet
*1
The manufacturing year and
month
are indicated on the
spec name plate.
Remote controller
OBH932

5
SPECIFICATION3
Indoor model MSZ-AY25VG
MSZ-AY25VGK
MSZ-AY25VGKP
MSZ-AY35VG
MSZ-AY35VGK
MSZ-AY35VGKP
MSZ-AY42VG
MSZ-AY42VGK
MSZ-AY42VGKP
MSZ-AY50VG
MSZ-AY50VGK
MSZ-AY50VGKP
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 RC0J30CV
Current *1 Cooling A0.18 0.24
Heating 0.26 0.32
Dimensions W × H × D mm 798 × 299 × 245
Weight kg VG, VGK: 10.5 VGKP: 11
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
630 666 630 702
High 468 504 546
Med. 378 420 450
Low 300 342 384
Silent 216 270 312
Heating
Super High
m3/h
708 774
High 480 516 546
Med. 396 420 438
Low 300 318 342
Silent 240 264 288
Sound level
Cooling
Super High
dB(A)
42 44
High 36 38 40
Med. 30 34 36
Low 24 29 33
Silent 18 21 28
Heating
Super High
dB(A)
45 48
High 39 38 40 43
Med. 34 31 35 38
Low 24 29 33
Silent 18 21 28
Fan speed
Cooling
Super High
rpm
940 980 940 1,020
High 760 800 850
Med. 650 700 740
Low 560 610 660
Silent 450 520 570
Heating
Super High
rpm
1,030 1,100
High 770 810 850
Med. 670 700 720
Low 560 580 610
Silent 480 510 540
Fan speed regulator 5
Remote controller model VG: SH22Q VGK - E1 , ET1 , ER1: SH22Q VGK - SC1: SH22S
VGKP - E1 , ET1 , ER1: SH22R VGKP - SC1: SH22T
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 Wet-bulb temperature 15°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, MV2) 12 V DC
Vertical Vane motor (MV3) 12 V DC
Varistor (NR11) 470 V
Terminal block (TB) 3P
OBH932

6
NOISE CRITERIA CURVES4
MSZ-AY25VG
MSZ-AY25VGK
MSZ-AY25VGKP
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
90
80
70
60
50
40
30
20
10
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
FAN SPEED FUNCTION SPL(dB(A)) LINE
Super High COOLING
HEATING
42
45
MSZ-AY35VG
MSZ-AY35VGK
MSZ-AY35VGKP
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
90
80
70
60
50
40
30
20
10
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
FAN SPEED FUNCTION SPL(dB(A)) LINE
Super High COOLING
HEATING
42
45
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-AY42VG
MSZ-AY42VGK
MSZ-AY42VGKP
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
90
80
70
60
50
40
30
20
10
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
FAN SPEED FUNCTION SPL(dB(A)) LINE
Super High COOLING
HEATING
44
48
MSZ-AY50VG
MSZ-AY50VGK
MSZ-AY50VGKP
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
90
80
70
60
50
40
30
20
10
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
FAN SPEED FUNCTION SPL(dB(A)) LINE
Super High COOLING
HEATING
42
45
OBH932

7
OUTLINES AND DIMENSIONS5
MSZ-AY25VG MSZ-AY35VG MSZ-AY42VG MSZ-AY50VG
MSZ-AY25VGK MSZ-AY35VGK MSZ-AY42VGK MSZ-AY50VGK
MSZ-AY25VGKP MSZ-AY35VGKP MSZ-AY42VGKP MSZ-AY50VGKP
Unit: mm
Piping Piping
ø37 O.D
ø37 O.D
ø6.35 - 0.57m (Flared connection ø6.35)
ø6.35 - 0.39m (Flared connection ø6.35)
ø9.52 - 0.52m (Flared connection ø9.52)
ø9.52 - 0.34m (Flared connection ø9.52)
Insulation ø29 Connected part ø16 O.D
Insulation ø29 Connected part ø16 O.D
Insulation
Insulation
Liquid line
Liquid line
Gas line
Gas line
Drain hose
Drain hose
E1 ,
SC1
ET1 ,ER1
OBH932

8
WIRING DIAGRAM6
MSZ-AY50VG- ET1
MSZ-AY25VG- ET1 MSZ-AY35VG- ET1 MSZ-AY42VG- ET1
OBH932

9
MSZ-AY50VGK- E1 , SC1 , ER1
MSZ-AY25VGK- E1 , SC1 , ER1 MSZ-AY35VGK- E1 , SC1 , ER1 MSZ-AY42VGK- E1 , SC1 , ER1
OBH932

10
MSZ-AY50VGK- ET1
MSZ-AY25VGK- ET1 MSZ-AY35VGK- ET1 MSZ-AY42VGK- ET1
OBH932