Mitsubishi OB379D Service Manual
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
HFC
utilized
R410A
OUTDOOR UNIT
SERVICE MANUAL
Wireless type
Models
Revision D:
•PARTS LIST and RoHS PARTS LIST have been
changed.
Please void OB379 REVISED EDITION-C.
No. OB379
REVISED EDITION-D
MUZ-GA25VA MUZ-GA25VA MUZ-GA25VA MUZ-GA25VA MUZ-GA35VA MUZ-GA35VA -
E1
E2
E3
E4
E1
E2
MUZ-GA25VAH MUZ-GA25VAH -
MUZ-GA25VAH MUZ-GA25VAH -
MUZ-GA35VAH MUZ-GA35VAH -
E1
E2
E3
E4
E1
E2
Indoor unit service manual
MSZ-GA•VA Series (OB378)
MSZ-CB•VA Series (OB441)
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················7
3. SPECIFICATION·················································8
4. NOISE CRITERIA CURVES·····························10
5. OUTLINES AND DIMENSIONS························11
6. WIRING DIAGRAM ··········································12
7. REFRIGERANT SYSTEM DIAGRAM··············20
8. PERFORMANCE CURVES······························23
9. ACTUA TOR CONTROL····································31
10. SERVICE FUNCTIONS·····································32
11. TROUBLESHOOTING ······································32
12. DISASSEMBLY INSTRUCTIONS·····················53
13. PARTS LIST······················································56
14. RoHS PARTS LIST···········································60
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
Revision A:
Model 6. Wiring diagram
11-6.N Check of inverter P.C.board
Change Change
MUZ-GA25VA
MUZ-GA25VAH
MUZ-GA35VA
MUZ-GA35VAH
No change No change
•Alternative inverter P.C.board has been added(Refer to 11-7.1. Inverter P.C.board (Alternative)). FUSE F901 has been
equipped to MUZ-GA35.
E2
• model has been added.
Quick clean kit has been removed.
Revision B:
•MUZ-GA25VA(H)- has been added.
•11-2. Failure mode recall function has been changed.
•RoHS PARTS LIST has been added.
E3
Revision C:
•MUZ-GA25VA(H)- has been added.
•Solenoid valve coil has been removed.
(MUZ-GA25VA- :Serial No. 6021351T~ , MUZ-GA25VAH- :Serial No. 7000001T~)
E4
E3E3
Revision D:
•PARTS LIST and RoHS PARTS LIST have been changed.
2
1
TECHNICAL CHANGES
MUZ-A09YV - ➔ MUZ-GA25VA MUZ-A09YVH - ➔ MUZ-GA25VAH -
1.Indication of capacity has been changed.(BTU base ➔ kW base)
2.Control method between indoor and outdoor unit has been changed.
3.Power supply method has been changed (change to supply from outdoor unit).
4.Terminal block for power supply has been added.
5.Power P.C. board has been changed.
6.Inverter P.C. board has been changed.
7.Refrigerant circuit has been changed.
• Compressor has been changed.(KNB073FBVH➔KNB065FDTH)
• LEV has been removed and capillary tube has been added.
• Bypass circuit for low outside temperature operation has been added.
• Specification and position of muffler have been changed.
• Path of outdoor heat exchanger has been changed.
• 4-way valve and R.V. coil have been changed.
• Stop valve has been changed.
8.Fan motor has been changed. (AC)
9.Shape of grille has been changed.
10.Shape of service panel has been changed.
11.Shape of propeller has been changed.
12.Quick Clean Kit has been added.
13.Symbol on terminal block has been changed (to S1/S2/S3).
MUZ-A12YV - ➔ MUZ-GA35VA MUZ-A12YVH - ➔ MUZ-GA35VAH -
E1E1
E1E1
E1E1
E1E1
1.Indication of capacity has been changed.(BTU base ➔ kW base)
2.Control method between indoor and outdoor unit has been changed.
3.Power supply method has been changed (change to supply from outdoor unit).
4.Terminal block for power supply has been added.
5.Power P.C. board has been changed.
6.Inverter P.C. board has been changed.
7.Refrigerant circuit has been changed.
• Compressor has been changed.(KNB092FAAH➔KNB073FDVH)
• Specification and position of muffler have been changed.
• Path of outdoor heat exchanger has been changed.
• 4-way valve and R.V. coil have been changed.
• Stop valve has been changed.
8.Fan motor has been changed.(AC➔DC)
9.Shape of grille has been changed.
10.Shape of service panel has been changed.
11.Shape of propeller has been changed.
12.Quick Clean Kit has been added.
13.Symbol on terminal block has been changed (to S1/S2/S3).
MUZ-GA25VA - ➔ MUZ-GA25VA MUZ-GA25VAH - ➔ MUZ-GA25VAH MUZ-GA35VA - ➔ MUZ-GA35VA MUZ-GA35VAH - ➔ MUZ-GA35VAH -
1.Quick clean kit has been removed.
MUZ-GA25VA - ➔ MUZ-GA25VA MUZ-GA25VAH - ➔ MUZ-GA25VAH -
1.Capillary tube for heating has been added.
2.Solenoid valve coil has been removed.(GA25VA- :Serial No. 6021351T~ , GA25VAH- :Serial No. 7000001T~)
E2E1
E2E1
E2E1
E2E1
E3E2
E3E2
E3E3
MUZ-GA25VA - ➔ MUZ-GA25VA MUZ-GA25VAH - ➔ MUZ-GA25VAH -
1.Refrigerant circuit has been changed.
2.Solenoid valve coil has been removed.
E4E3
E4E3
3
Refrigeration
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (:)
Steam pressure [25:](Mpa)
Saturated steam density [25:](Kg/K)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1:Ozone Depletion Potential : based on CFC-11
w2 :Global Warming Potential : based on CO
2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
New Specification Current Specification
The incompatible refrigeration oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigeration oil of the upper layer to flow back to the
compressor.
Since refrigerant and refrigeration oil are compatible,
refrigeration oil goes back to the compressor through the
lower position oil back hole.
Compressor
Suction muffler
Oil back hole
Refrigeration oil
Refrigerant
Compressor
Suction muffler
Oil back hole
Refrigeration oil /Refrigerant
Compressor
• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.
• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air
conditioners.
1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/
materials are required. Refer to the table below.
2 Take sufficient care not to allow water and other contaminations to enter the R410Arefrigerant during storage and
installation, since it is more susceptible to contaminations than R22.
3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
4
Conversion chart of refrigerant temperature and pressure
R410A tools
Can R22 tools be used?
Gas leak detector
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
resistance.
Dedicated for HFC refrigerant.
6.35 mm and 9.52 mm
Description
Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization
No
No
No
Yes
Yes
New
New
New
Gauge manifold
Charge hose
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A Yes : Substitutable for R410A
No 12.7 mm
Wall
thickness
Outside diameter
Pipe
mm
For liquid
For gas
6.35
9.52
12.7
0.8 mm
0.8 mm
0.8 mm
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
Insulation material
(MPa [Gauge])
4.0
3.5
3.0
2.5
2.0
1.5
R410A
R22
NOTE : The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
1.0
0.5
Saturated liquid pressure
0.0
-0.5
-30 -20 -10 0 10 20
30
40 50 60
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/ff[Gauge])
(:)
1.Tools dedicated for the air conditioner with R410A refrigerant
The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
2.Refrigerant piping
1 Specifications
Use the refrigerant pipes that meet the following specifications.
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.
5
Electronic scale for refrigerant charging
Outdoor unit
Refrigerant gas
cylinder
operating valve
Refrigerant gas cylinder
for R410A with siphon
Refrigerant (liquid)
Service port
Gauge manifold
valve (for R410A)
Union
Liquid pipe
Gas pipe
Stop valve
Indoor unit
Charge hose (for R410A)
R410A
Pipe diameter
mm
6.35
9.52
12.7
17
22
26
Dimension of flare nut
R22
17
22
24
2 Flaring work and flare nut
Flaring work for R410A pipe differs from that for R22 pipe.
For details of flaring work, refer to Installation manual “FLARING WORK”.
3.Refrigeration oil
Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.
4.Air purge
• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant
circuit.
• Use the vacuum pump for air purging for the purpose of environmental protection.
5.Additional charge
For additional charging, charge the refrigerant from liquid phase of the gas cylinder.
If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the
outdoor unit. In this case, capacity of the refrigeration cycle decreases or normal operation can be impossible. However,
charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.
6
2
PART NAMES AND FUNCTIONS
MUZ-GA25VA MUZ-GA35VA
MUZ-GA25VAH MUZ-GA35VAH
Air inlet
(back and side)
Piping
Drain hose
Air outlet
Drain outlet
ACCESSORIES
Drain socket
1
Quick clean kit
2
MUZ-GA25VA MUZ-GA35VA -
1
1
E1
MUZ-GA25VAH -
E1
MUZ-GA35VAH -
MUZ-GA25VA -
E1
MUZ-GA25VA -
E1
MUZ-GA25VA MUZ-GA35VA -
–
1
1
––
E2
MUZ-GA25VAH -
E3
MUZ-GA25VAH -
E4
MUZ-GA25VAH -
E2
MUZ-GA35VAH -
–
E2
E3
E4
E2
7
3
SPECIFICATION
Outdoor model
Function
Power supply
A
A
W
%
A
A
A
W
"
"
kg
kg
cc
2.5 (0.9-3.0)
U-V 1.88
Capacity Rated frequency(Min.-Max.)
Dehumidification
Air flow ✽1
Capacity
Power outlet
Running current ✽1
Power input ✽1
Power factor ✽1
Starting current ✽1
Electrical
data
Compressor motor current ✽1
Fan motor current ✽1
Coefficient of performance(C.O.P)
Model
Output
Winding
resistance(at 20:)
Compressor
Model
Winding
Fan
motor
resistance(at 20:)
Dimensions WOHOD
Weight
Sound level ✽1
Fan speed(High/Low, High/Med./Low)
Fan speed regulator
Refrigerant filling
Special
remarks
capacity(R410A)
Refrigeration oil (Model)
NOTE : Test conditions are based on ISO 5151
Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:
Outdoor Dry-bulb temperature 35:Wet-bulb temperature(24:)
Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:
Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6:
Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency
kW
r/h
K /h
✽1
mm
dB(A)
rpm
MUZ-GA25VA
MUZ-GA25VAH
Cooling
Single phase
230V,50Hz
1.4
1,890
10
2.95
607
89
3.6
2.71
0.24
3.91
KNB065FDTH
500
V-W 1.88
RA6V21-AB
WHT-BLK 347
BLK-RED 281
800o550o285
31
46
810
1
0.85
320 (NEO22)
Heating
3.2 (0.9-4.5)
—
3.35
727
94
3.11
4.21
U-W 1.88
MUZ-GA35VA
MUZ-GA35VAH
Cooling
Single phase
230V,50Hz
3.5 (1.0-3.9)
2.0
2,058
4.75
1,047
96
4.44
0.31
3.24
KNB073FDVH
U-V 1.53
V-W 1.53
RC0J50-AL
WHT-BLK 37.5
BLK-RED 37.5
RED-WHT 37.5
800o550o285
47
810/750
2
320 (NEO22)
Heating
4.0 (0.9-5.0)
2,178
10
4.55
1,022
5.0
4.20
0.35
3.79
550
U-W 1.53
33
880/810/650
0.90
—
98
48
3
8
Specifications and rating conditions of main electric parts
Item
Model
Current transformer
Current transformer
Smoothing capacitor
Diode module
(CT761, CT781)
(
C63A, C63B, C63C
(DB61, DB65)
Fuse
Fuse
Fuse
(CT)
(F61)
(F71, F801)
( F901 w1)
Defrost heater
Intelligent power module
Expansion valve coil
Reactor
Current-detecting resistor
Current-detecting resistor
Current-limiting resistor
(
Terminal block
Relay
Relay
Relay
Relay
R.V. coil
Solid state relay
Solenoid valve coil
Heater protector
(IPM)
(LEV)
(L61)
(R61)
(R831)
R64A, R64B
(TB1,TB2)
(X63)
(X64)
(X66)
(X69)
(21S4)
(SR61)
(21R1)
(26H)
)
(H)
)
MUZ-GA25VA
—
—
G5NB-1a(for
FQ-208-RK (for
—
Outdoor fan motor thermal fuse
w1 Refer to Revision A.
w2 MUZ-GA25VA- (Serial No. ~6021350T)
MUZ-GA25VAH- (Serial No. ~7000000T)
E3
E3
MUZ-GA25VAH
—
230V 130W
—
E1 / E2 / E3 )
SHF-4-10W5
G3MC-202PL
E1 / E2 / E3 w2)
Open 152:
ETA19Z59BZ
ETQ19Z71AY
620+ 420V
D25XB60
250V 20A
250V 3.15A
PS21244-A-203
10A 23.0mH
45m" 5W (1 element)
25m" 5W
10" 5W
G5NB-1a
G4A-1A-PS
G5NB-1a
Open 45:
MUZ-GA35VA
3P
MUZ-GA35VAH
250V 3.15A
—
230V 130W
CAM-MD12ME 12VDC
—
G5NB-1a
—
STF-01AJ503
—
—
—
Open 45:
—
9
4
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
Test conditions
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
SPL(dB(A)) LINE
HEATING
46
46
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
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
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
SPL(dB(A))
LINE
FAN SPEED
HEATING
47
48
Test conditions
Cooling : Dry-bulb temperature 35: Wet-bulb temperature (24:)
Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:
OUTDOORUNIT
MICROPHONE
1m
High
Med.
NOISE CRITERIA CURVES
MUZ-GA25VA
MUZ-GA25VAH
MUZ-GA35VA
MUZ-GA35VAH
10
5
10
69
800
302.5
500 Bolt pitch for installation
150
22.3
Handle
550
280
164.5
99.5
170.5
23
Service panel
Service port
285
344.5
44
400
Air in
Air out
Air in
17.5
Bolt pitch for
installation
304~325
40
Liquid refrigerant pipe joint
Refrigerant pipe (flared) [6.35
Gas refrigerant pipe joint
Refrigerant pipe (flared) [9.52
43-
35-
2 holes 10X21
Drain hole [33 (MUZ-GA25/GA35VAH)
REQUIRED SPACE
Basically open 100mm or more
without any obstruction in front
and on both sides of the unit.
350mm or more
200mm or more
100mm or more
100mm or more
Open two sides of left,
right, or rear side.
Drain hole [42 (MUZ-GA25/GA35VA)
OUTLINES AND DIMENSIONS
MUZ-GA25VA MUZ-GA35VA
MUZ-GA25VAH MUZ-GA35VAH
Unit: mm
11
6
SYMBOL
CT,CT761,CT781
C63A,C63B,C63C
C65
DB61,DB65
DSA61
F61
F71,F801
IC801
IPM
SYMBOL
L61
L62,L63MCMF
NR63,NR64
RT61
RT62
RT64
RT65
SYMBOL
R61,R831
R64A,R64B
SR61
TB1,TB2
TR821
T801
X63,X64,X69
21S4
21R1
NAME
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
OUTDOOR FAN CAPACITOR
DIODE MODULE
SURGE ABSORBER
FUSE (T20AL250V)
FUSE (T3.15AL250V)
INTELLIGENT POWER DEVICE
INTELLIGENT POWER MODULE
NAME
REACTOR
CMC COIL
COMPRESSOR
OUTDOOR FAN MOTOR(INNER FUSE)
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
FIN TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
NAME
CURRENT-DETECTING RESISTOR
CURRENT-LIMITING RESISTOR
SOLID STATE RELAY
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
R.V. COIL
SOLENOID VALVE COIL
WIRING DIAGRAM
MUZ-GA25VAMUZ-GA25VAMUZ-GA25VA- (Serial No. ~6021350T)
E1
E2
E3
U
BLK
1
BLK
LD-U
CT761
U
P
+++
W
REDRED
2
WHT
LD-V
V
F801
MC
3
N
C63C
C63B
C63A
CN61
LD-W
W
R61
V
WHT
CT781
IPM
T801
IC801
CN642
2134
CN641
2121
CN643
INVERTER P.C. BOARD
R831
LDY
54321
CN601
TR821
RT64
RT62RT61
RT65
GRN
the indoor unit electric wiring diagram for
servicing.
2.Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NOTE:1. About the indoor side electric wiring refer to
BLK
L61
BLK
TAB63
TAB61
L63
L62
WHT
F61
DB61
R64A
R64B
LD70
X64
TAB62
BLK
BLU
3
4
CT
LD69
CN721
X63
F71
NR63NR64
TB800
21S4
2
1
DSA61
MF
CN771
C65
SR61
LDE
GRN
DB65
21R1
2
1
321
2
1
CN923
CN726 CN725
X69
64
CN727
POWER P.C. BOARD
WHITE
BLU
RED
WHT
BLU
230V~
RED
S2S1S3
V
12-24
TB2
L
GRN/YLW
N
~/N
230V 50Hz
TB1
CONNECTING
TO INDOOR UNIT
CIRCUIT BREAKER
PE
POWER
SUPPLY
12
MUZ-GA25VA- (Serial No. 6021351T~)
MUZ-GA25VA-
E3
E4
13
SYMBOL
CT,CT761,CT781
C63A,C63B,C63C
C65
DB61,DB65
DSA61
F61
F71,F801HIC801
IPM
SYMBOL
L61
L62,L63MCMF
NR63,NR64
RT61
RT62
RT64
RT65
R61,R831
SYMBOL
R64A,R64B
SR61
TB1,TB2
TR821
T801
X63,X64,X66,X69
21S4
21R1
26H
NAME
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
OUTDOOR FAN CAPACITOR
DIODE MODULE
SURGE ABSORBER
FUSE (T20AL250V)
FUSE (T3.15AL250V)
DEFROST HEATER
INTELLIGENT POWER DEVICE
INTELLIGENT POWER MODULE
NAME
REACTOR
CMC COIL
COMPRESSOR
OUTDOOR FAN MOTOR(INNER FUSE)
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
FIN TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
CURRENT-DETECTING RESISTOR
NAME
CURRENT-LIMITING RESISTOR
SOLID STATE RELAY
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
R.V. COIL
SOLENOID VALVE COIL
HEATER PROTECTOR
MUZ-GA25VAH- MUZ-GA25VAH- (Serial No. ~7000000T)
MUZ-GA25VAH-
E2
U
E3E1
V
BLK
L61
BLK
TAB63
BLK
DB61
1
BLK
LD-U
U
P
R64A
R64B
MC
W
2
3
WHT
RED RED
LD-V
CT761
V
N
F801
C63C
C63B
+++
C63A
LD70
X64
CN61
LD-W
CT781
W
R61
BLK
BLU
3
4
CT
WHT
IPM
T801
LD69
1
CN721
X63
F71
IC801
TR821
TB800
21S4
2
CN771
CN642
431212
CN641
21
CN643
INVERTER P.C. BOARD
LDY
21R1
2
2
1
1
45
231
CN601
CN725CN727 CN726
46
R831
DB65
MF
312
CN923
X69
C65
SR61
RT65 RT64RT62RT61
GRN
the indoor unit electric wiring diagram for
servicing.
2.Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NOTE:1. About the indoor side electric wiring refer to
L63
L62
TAB61
WHT
F61
BLU
WHT
TB2
S1
S2
230V~
TAB62
NR64 NR63
RED
S3
V
12-24
CONNECTING
TO INDOOR UNIT
DSA61
LDE
POWER P.C. BOARD
GRN
GRN/YLW
N
~/N
230V 50Hz
PE
POWER
SUPPLY
TB1
L
CIRCUIT BREAKER
14
X66
CN722
RED
1
2
BLKBLK
BLK BLK
312
YLW
26H
BLK
H
BLK
1
BLK
WHITE
BLU
RED
2
MUZ-GA25VAH- (Serial No. 7000001T~)
MUZ-GA25VAH-
E3
E4
15
SYMBOL
CT,CT761,CT781
C63A,C63B,C63C
DB61,DB65
DSA61
F61
F71,F801
IC801
IPM
LEV
SYMBOL
L61
L62,L63MCMF
NR63,NR64
RT61
RT62
RT64
RT65
SYMBOL
R61,R831
R64A,R64B
TB1,TB2
TR821
T801
X63,X64
21S4
NAME
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
DIODE MODULE
SURGE ABSORBER
FUSE (T20AL250V)
FUSE (T3.15AL250V)
INTELLIGENT POWER DEVICE
INTELLIGENT POWER MODULE
EXPANSION VALVE COIL
NAME
REACTOR
CMC COIL
COMPRESSOR
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
FIN TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
NAME
CURRENT-DETECTING RESISTOR
CURRENT-LIMITING RESISTOR
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
R.V. COIL
MUZ-GA35VA
~/N
230V~
230V 50Hz
CIRCUIT BREAKER
PE
RED
BLU
WHITE
GRN/YLW
TB1
POWER
SUPPLY
L
N
R64A
TB2
S3
S1
TO INDOOR UNIT
CONNECTING
S2
RED
BLU
WHT
R64B
WHT
+++
NR63
LDE
GRN
4
6
21
231
CN601
45
31
24
5
3
2
1
24
51 3
CN931 CN932
431212
TB800
RT65 RT64RT62RT61
POWER P.C. BOARD
CN643
CN641
INVERTER P.C. BOARD
CN642
21S4
MF
X63
CN721
1
2
IC801
F801
C63C
LD-V
LD-W
LD-U
3
1
WHT
BLK
RED RED
V
BLK
WHT
W
U
MC
CN61
IPM
CT781
CT761
2
CN724
LEV
6
R61
N
U
V
W
P
L61
BLK
R831
TAB63
3
LD69
DB65
DB61
LD70
TR821
C63B
C63A
BLK
T801
L63
NR64
DSA61
F61
CT
LDY
TAB61
L62
X64
4
F71
TAB62
GRN
BLK
BLU
CN727CN72
6
CN725
12-24
V
the indoor unit electric wiring diagram for
servicing.
2.Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NOTE:1. About the indoor side electric wiring refer to
16
MUZ-GA35VAH
SYMBOL
CT,CT761,CT781
C63A,C63B,C63C
DB61,DB65
DSA61
F61
F71,F801HIC801
IPM
LEV
SYMBOL
L61
L62,L63MCMF
NR63,NR64
RT61
RT62
RT64
RT65
R61,R831
SYMBOL
R64A,R64B
TB1,TB2
TR821
T801
X63,X64,X66
21S4
26H
NAME
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
DIODE MODULE
SURGE ABSORBER
FUSE (T20AL250V)
FUSE (T3.15AL250V)
DEFROST HEATER
INTELLIGENT POWER DEVICE
INTELLIGENT POWER MODULE
EXPANSION VALVE COIL
NAME
REACTOR
CMC COIL
COMPRESSOR
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
FIN TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
CURRENT-DETECTING RESISTOR
NAME
CURRENT-LIMITING RESISTOR
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
R.V. COIL
HEATER PROTECTOR
BLK
L61
BLK
U
BLK
BLK
LD-U
U
P
DB61
TAB63
R64A
R64B
W
2
1
WHT
RED RED
LD-V
CT761
V
F801
+++
MC
3
LD-W
W
N
C63C
C63B
C63A
LD70
X64
CN61
CT781
R61
BLK
BLU
3
4
V
WHT
IPM
T801
6
CN724
LD69
X63
LEV
IC801
TR821
TB800
21S4
1
2
CN642
431212
CN641
21
CN643
3
2
1
INVERTER P.C. BOARD
5
3
24
CN931 CN932
1
R831
LDY
CN725
4
23145
CN601
6
DB65
6
CN727CN72
CN721
5
31
24
GRN
RT65 RT64RT62RT61
MF
the indoor unit electric wiring diagram for
servicing.
2.Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NOTE:1. About the indoor side electric wiring refer to
L63
L62
TAB61
WHT
F61
WHT
TB2
S1
230V~
BLU
S2
TAB62
RED
S3
V
12-24
CT
F71
DSA61
LDE
NR64 NR63
GRN
GRN/YLW
TB1
L
N
CONNECTING
TO INDOOR UNIT
CIRCUIT BREAKER
~/N
230V 50Hz
X66
WHITE
BLU
312
CN722
POWER P.C. BOARD
BLK
RED
YLW
1
2
1
2
BLKBLK
BLK
BLK
BLK BLK
H
PE
POWER
26H
SUPPLY
17
RED
SYMBOL
CT,CT761,CT781
C63A,C63B,C63C
DB61,DB65
DSA61
F61
F71,F801,F901
IC801
IPM,IC932
LEV
SYMBOL
L61
L62,L63MCMF
NR63,NR64
RT61
RT62
RT64
RT65
SYMBOL
R61,R831
R64A,R64B
TB1,TB2
TR821
T801
X63,X64
21S4
NAME
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
DIODE MODULE
SURGE ABSORBER
FUSE (T20AL250V)
FUSE (T3.15AL250V)
INTELLIGENT POWER DEVICE
INTELLIGENT POWER MODULE
EXPANSION VALVE COIL
NAME
REACTOR
CMC COIL
COMPRESSOR
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
FIN TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
NAME
CURRENT-DETECTING RESISTOR
CURRENT-LIMITING RESISTOR
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
R.V. COIL
MUZ-GA35VA
ww
Alternative inverter P.C. board
U
MC
BLK
W
RED
1
2
3
CN61
WHT
BLK
RED
LD-W
LD-U
LD-V
CT761
U
V
W
P
N
R61
V
WHT
CT781
IPM
LEV
6
724
C
N
CN931
IC932
F901
CN932
3
2
1
5
42
3
1
MF
5
42
3
1
the indoor unit electric wiring diagram for
servicing.
2.Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NOTE:1. About the indoor side electric wiring refer to
L61
DB61
BLK
BLK
TAB63
L63
L62
TAB61
WHT
F61
+++
R64A
R64B
F801
C63C
C63B
C63A
LD70
X64
TAB62
BLK
3
4
CT
T801
BLU
NR63
NR64
LD69
X63
F71
IC801
TR821
TB800
21S4
1
2
DSA61
GRN
DB65
6
C
CN721
LDE
CN642
21213412
CN641
INVERTER P.C. BOARD
CN643
R831
LDY
CN601
725
C
N
4
726
727
C
N
N
RT61 RT62 RT64RT65
GRN
45
231
POWER P.C. BOARD
WHITE
BLU
RED
WHT
TB2
S1
~
230V
BLU
S2
RED
S3
12-24V
TB1
L
N
CONNECTING
TO INDOOR UNIT
CIRCUIT BREAKER
~/N
230V 50Hz
GRN/YLW
PE
POWER
SUPPLY
18
MUZ-GA35VAH
SYMBOL
CT,CT761,CT781
C63A,C63B,C63C
DB61,DB65
DSA61
F61
F71,F801,F901
H
IC801
IPM,IC932
LEV
SYMBOL
L61
L62,L63MCMF
NR63,NR64
RT61
RT62
RT64
RT65
R61,R831
SYMBOL
R64A,R64B
TB1,TB2
TR821
T801
X63,X64,X66
21S4
26H
NAME
CURRENT TRANSFORMER
SMOOTHING CAPACITOR
DIODE MODULE
SURGE ABSORBER
FUSE (T20AL250V)
FUSE (T3.15AL250V)
DEFROST HEATER
INTELLIGENT POWER DEVICE
INTELLIGENT POWER MODULE
EXPANSION VALVE COIL
NAME
REACTOR
CMC COIL
COMPRESSOR
OUTDOOR FAN MOTOR
VARISTOR
DEFROST THERMISTOR
DISCHARGE TEMPERATURE THERMIST OR
FIN TEMPERATURE THERMIST OR
AMBIENT TEMPERA TURE THERMIST OR
CURRENT-DETECTING RESISTOR
NAME
CURRENT-LIMITING RESISTOR
TERMINAL BLOCK
SWITCHING POWER TRANSISTOR
TRANSFORMER
RELAY
R.V. COIL
HEATER PROTECTOR
ww
Alternative inverter P.C. board
BLK
U
1
BLK
LD-U
U
P
MC
W
2
3
WHT
RED RED
LD-V
CT761
V
N
CN61
LD-W
W
R61
V
WHT
CT781
IPM
LEV
6
CN932
3
2
1
5
3
24
1
MF
5
31
24
the indoor unit electric wiring diagram for
servicing.
2.Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block, : Connector
NOTE:1. About the indoor side electric wiring refer to
724
C
N
IC932
CN931
F901
BLK
L61
BLK
TAB63
TAB61
TB2
DB61
L63
L62
WHT
F61
WHT
S1
230V~
F801
+++
R64A
R64B
BLU
S2
T801
C63C
C63B
C63A
LD70
BLK
BLU
3
X64
4
CT
TAB62
NR64 NR63
RED
S3
V
12-24
CONNECTING
TO INDOOR UNIT
CIRCUIT BREAKER
LD69
X63
F71
TB1
L
IC801
TR821
TB800
21S4
1
2
DSA61
GRN
N
~/N
CN642
431212
CN641
INVERTER P.C. BOARD
21
CN643
R831
LDY
CN725
4
23145
CN601
6
DB65
6
CN727CN72
CN721
X66
LDE
POWER P.C. BOARD
GRN/YLW
PE
POWER
SUPPLY
230V 50Hz
CN722
RED
1
2
BLKBLK
BLK BLK
312
YLW
26H
BLK
H
1
BLK
2
BLK
RT65 RT64RT62RT61
GRN
WHITE
BLU
RED
19
7
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
Muffler
Muffler
4-way valve
Refrigerant flow in heating
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe [6.35
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
Capillary tube
[3.0✕[1.4✕800
Check
valve
Capillary tube
[3.0✕[1.4✕500
Solenoid
valve
Ambient
temperature
thermistor
RT65
Outdoor
heat
exchanger
Flared connection
Defrost
thermistor
RT61
Discharge
temperature
thermistor
RT62
Flared connection
Stop valve
(with strainer)
Stop valve
(with service port)
Refrigerant flow in cooling
Compressor
Muffler
Muffler
4-way valve
Refrigerant flow in heating
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe [6.35
(with heat insulator)
R.V. coil
heating ON
cooling OFF
Strainer
#100
Capillary tube
[3.0✕[1.4✕800
Check
valve
Capillary tube
[3.0✕[1.4✕500
Solenoid
valve
Ambient
temperature
thermistor
RT65
Capillary tube
[3.0✕[1.4✕400
Check valve
REFRIGERANT SYSTEM DIAGRAM
MUZ-GA25VA - MUZ-GA25VA MUZ-GA25VAH - MUZ-GA25VAH -
E2E1
E2E1
Unit:mm
MUZ-GA25VA MUZ-GA25VAH -
E3
E3
20
Unit:mm
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