Mitsubishi Electric MCFH-GA50VB Assembly Instructions
The Mitsubishi Electric MCFH-GA50VB is a powerful and efficient air conditioner, designed to provide reliable cooling and heating in spaces up to 50 square meters. With its advanced features, such as wireless remote control, energy-saving modes, and automatic operation, this air conditioner is a great choice for those seeking comfort and convenience.
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OB380A.qxp 06.5.11 11:30 AM Page 1
FLOOR AND CEILING TYPE AIR CONDITIONERS
Revision A:
● RoHS PARTS LIST has been added.
Please void OB380.
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
MCFH-GA35VB -
MCFH-GA50VB -
MCFH-GA60VB -
E1
E1
E1
(When installed on the floor)
(When installed on the ceiling)
No. OB380
REVISED EDITION-A
CONTENTS
Outdoor unit service manual
MUCFH-GA•VB Series (OB381)
MXZ-A•WV Series (OB319)
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································4
4. NOISE CRITERIA CURVES ·······························5
5. OUTLINES AND DIMENSIONS ·························6
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM ················8
8. SERVICE FUNCTIONS ······································9
9. TROUBLESHOOTING······································11
10. DISASSEMBLY INSTRUCTIONS·····················19
11. PARTS LIST······················································21
12. RoHS PARTS LIST···········································23
13. OPTIONAL PARTS···········································25
NOTE:
This service manual describes technical data of the indoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS PARTS LIST (RoHS compliant).
OB380A.qxp 06.5.11 11:30 AM Page 2
Revision A :
• RoHS PARTS LIST has been added.
1 TECHNICAL CHANGES
MCFH-A12WV-
E1
➔ MCFH-GA35VB-
1. Model name has been changed.
E1
MCFH-A18WV-
E1
➔ MCFH-GA50VB-
1. Model name has been changed.
E1
MCFH-A24WV-
E1
➔ MCFH-GA60VB-
1. Model name has been changed.
E1
2 PART NAMES AND FUNCTIONS
MCFH-GA35VB MCFH-GA50VB MCFH-GA60VB
(When installed on the floor)
Vertical vanes
Horizontal vane
Operation indicator lamp
Receiving section
Front panel
Air cleaning filter
(white bellows type)(option)
Air inlet
Air filter
Deodorizing filter
(gray sponge type)(option)
ACCESSORIES
Item
Installation plate
Unit fixing screw
5 o 12mm
Wireless remote controller
Remote controller mounting hardware
Fixing screw for
3.5 o 16mm (Black)
Battery (AAA) for remote controller
Drain hose
Drain pipe cover
Knockout cover
Screw for 4 o 10mm
Operation section
(When the air inlet grille is opened.)
Remote controller
1
2
2
1
2
1
1
Q'ty
2
2
1
(When installed on the ceiling)
Emergency operation switch
2
OB380A.qxp 06.5.11 11:30 AM Page 3
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
REMOTE CONTROLLER
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF)button
PM
AM
ON/OFF
TOO
WARM
TOO
COOL
Open the front lid.
TEMPERATURE buttons
Indication of remote controller model is on back.
CLOCK
PM
AM
ON/OFF TOO
WARM
TOO
COOL
VANE CONTROL button
OPERATION SELECT button
ECONO COOL button
RESET button
FAN STOP
I FEEL COOL
HEAT DRY
MODE
VANE START
HR.
ECONO COOL MIN.
RESET CLOCK
FAN SPEED CONTROL button
OFF-TIMER button
ON-TIMER button
HR. button
MIN. button
(TIME SET button)
CLOCK SET button
3
OB380A.qxp 06.5.11 11:30 AM Page 4
3 SPECIFICATION
Indoor model
Function
Power supply
Capacity Air flow(High/Med.
W /Low W )
Power outlet
Running current
Power input
Power factor
Fan motor current
Model
Winding resistance(at20 : )
Dimensions W
O
H
O
D
Weight
Air direction
Sound level(High/Med.
W
/Low
W
)
Fan speed(High/Med.
W
/Low
W
)
Fan speed regulator
Thermistor RT11(at25 : )
Thermistor RT12(at25 : )
Remote controller model
K /h
A
A
W
%
A
" mm kg dB rpm k " k "
MCFH-GA35VB
Cooling Heating
MCFH-GA50VB
Cooling Heating
780/636
W
/492
W
10
0.30
66
96
0.30
RB4V25-AC
WHT-BLK 182.2 BLK-YLW 68.9
YLW-BLU 47.5 BLU-BRN 31.5
BRN-RED 22.9
Single phase
230V, 50Hz
25
5
46/41
W
/36
W
1,240/1,060/845
3
10
10
KM04M
840/696
W
10
0.36
80
97
0.36
5
/570
48/44
W
/39
W
1,320/1,145/960
3
10
10
KM04M
W
RB4V36-AC
WHT-BLK 82.9 BLK-YLW 65.6
YLW-BLU 36.0 BLU-BRN 27.0
BRN-RED 13.7
1100 ✕ 650 ✕ 180
25
NOTE: Test conditions are based on ISO 5151
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB(24°C)
Indoor-Outdoor piping length : 5 m w Reference value
Heating : Indoor DB20°C WB 15°C
Outdoor DB 7°C WB 6°C
MCFH-GA60VB
Cooling Heating
840/744
W
/642
W
10
0.36
80
97
0.36
RB4V36-DB
WHT-BLK 84.0 BLK-YLW 46.2
YLW-BLU 37.2 BLU-BRN 45.2
BRN-RED 13.6
25
5
48/45
W
/42
W
1,320/1,190/1,060
3
10
10
KM04M
4
OB380A.qxp 06.5.11 11:30 AM Page 5
4 NOISE CRITERIA CURVES
MCFH-GA35VB
FAN SPEED FUNCTION
COOLING
High
HEATING
SPL(dB
46
(A)
) LINE
Test conditions,
Cooling : DB 27 : WB 19 :\
Heating : DB 20 : WB 15 :
90
MCFH-GA50VB
FAN SPEED FUNCTION
COOLING
High
HEATING
SPL(dB
48
(A)
) LINE
Test conditions,
Cooling : DB 27 : WB 19 :\
Heating : DB 20 : WB 15 :
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
20
10
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125
NC-20
250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
MCFH-GA60VB
FAN SPEED FUNCTION
COOLING
High
HEATING
SPL(dB
48
(A)
) LINE
Test conditions,
Cooling : DB 27 : WB 19 :\
Heating : DB 20 : WB 15 :
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
20
10
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125
NC-20
250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
INDOOR UNIT
MICROPHONE
WALL
1m
1m
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
20
10
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125
NC-20
250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
5
OB380A.qxp 06.5.11 11:30 AM Page 6
5 OUTLINES AND DIMENSIONS
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
80.8
50cm or more
(When installed on the floor)
50cm or more
906
16
112.8
Unit: mm
50cm (When installed on the ceiling)
or m ore
50cm or more
93
77
58 19
1100
Liquid line
6.35
Wireless remote controller
180
Gas line
12.7 (MCFH-GA35/GA50VB)
15.88 (MCFH-GA60VB)
6
OB380A.qxp 06.5.11 11:30 AM Page 7
6 WIRING DIAGRAM
MCFH-GA35VB MCFH-GA50VB MCFH-GA60VB
POWER
SUPPLY
~/N 230V
50Hz
TO OUTDOOR
UNIT
CONNECTING
12V
PE
L
CIRCUIT BREAKER
N
TB2
BLU
3
N
TB1
GRN/YLW
BLU
RED
BRN
1
2
3
CN201
CN CN
101 113
5
HIC1
CN
112
LDCOM
CN
151
TAB12
C11
LDC11
LDC12
F11
X144
LDFH
LDFM
SR143
LDFL
SR142
SR141
LDFVL
ELECTRONIC CONTROL P.C BOARD
6
4 5
5
MV
REMOTE
CONTROLLER
DISP/
RECEIVER
P.C.BOARD
SW/THERMO
P.C.BOARD
RT11
2 2
RT12
WHT
ORN
RED
BLK
YLW
BLU
BRN
1
2
3
4
5
6
7
8
WHT
ORN
RED
BLK
YLW
BLU
BRN
MF
GRN/YLW
SYMBOL
C11
F11
HIC1
MF
NAME
INDOOR FAN CAPACITOR
FUSE (3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)
SYMBOL
MV
NR11
RT11
RT12
VANE MOTOR
NAME
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
NOTES: 1.About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2.Use copper conductors only. (For field wiring)
3.Symbols below indicate.
: Terminal block : Connector
SYMBOL NAME
SR141~SR143 SOLID STATE RELAY
TB1, TB2
X144
TERMINAL BLOCK
RELAY
7
OB380A.qxp 06.5.11 11:30 AM Page 8
7 REFRIGERANT SYSTEM DIAGRAM
MCFH-GA35VB
Refrigerant pipe [ 12.7
(with heat insulator)
Indoor heat exchanger
Distributor
Flared connection
Indoor coil thermistor
RT12
MCFH-GA50VB
Refrigerant pipe [ 12.7
(with heat insulator)
Indoor heat exchanger
Distributor
Flared connection
Indoor coil thermistor
RT12
Unit : mm
Room temperature thermistor
RT11 Flared connection
Refrigerant pipe
[ 6.35
(with heat insulator)
MCFH-GA60VB
Refrigerant pipe [ 15.88
(with heat insulator)
Indoor heat exchanger
Distributor
Indoor coil thermistor
RT12
Flared connection
Room temperature thermistor
RT11
Flared connection
Refrigerant pipe
[ 6.35
(with heat insulator)
Room temperature thermistor
RT11 Flared connection
Refrigerant pipe
[ 6.35
(with heat insulator)
Refrigerant flow in cooling
Refrigerant flow in heating
8
OB380A.qxp 06.5.11 11:30 AM Page 9
8 SERVICE FUNCTIONS
MCFH-GA35VB MCFH-GA50VB MCFH-GA60VB
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-6.)
3-minutes time delay : 3-minutes → 3-seconds
Set time : 1 minute ➔ 1-second
Set time : 3 minute ➔ 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS.)
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.
How to modify the remote controller P.C. board
Remove batteries before modification. The board has a print as shown below;
NOTE : For remodelling, take out the batteries and press the OPERATE/STOP(ON/OFF) button twice or 3 times at first.
After finish remodelling, put back the batteries then press the RESET button.
J1 J2
The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in
Table 1. After modification, press the RESET button.
Table1.
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
1 unit operation
No modification
–
–
–
2 units operation
Same as at left
Solder J1
–
–
3 units operation
Same as at left
Same as at left
Solder J2
–
4 units operation
Same as at left
Same as at left
Same as at left
Solder both J1 and J2
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit.
The indoor unit only accepts the signal from the remote controller that has been assigned to the indoor unit once they are set.
The setting will be cancelled if the breaker has turned OFF, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.
9
OB380A.qxp 06.5.11 11:30 AM Page 10
8-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure.Then, the unit will restart automatically. However if the unit is operated in “I FEEL CON-
TROL” mode before power failure, the operation is not memorized. In “I FEEL CONTROL” mode, the operation is decided by the initial room temperature.
Operation
1
If the main power (230V AC) has been cut, the operation settings remain.
2
After the power is restored, the unit restarts automatically according to the memory.(However, it takes at least 3 minutes for the compressor to start running.)
How to release “AUTO RESTART FUNCTION”
1
Turn OFF the main power for the unit.
2
Pull out the electronic control P.C. board. (Refer to 10.)
3
Solder jumper wire to the JR07 on the indoor electronic control P.C. board. (Refer to 9-6.)
C11
TAB12
IC101
CN105
JR07
SW2
NOTE
• The operation settings are memorized when 10 seconds have passed after the remote controller was operated with the remote controller.
• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active ,the timer setting is cancelled.
• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is off.
• To prevent breaker off due to the rush of starting current, systematize other home appliances not to turn ON at the same time.
• When some air conditioners are connected to the same supply system, if they are operated before power failure, the starting current of all the compressors may flow simultaneously at restart.
Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one.
10
OB380A.qxp 06.5.11 11:30 AM Page 11
9 TROUBLESHOOTING
MCFH-GA35VB MCFH-GA50VB MCFH-GA60VB
9-1. Cautions on troubleshooting
1. Before troubleshooting, check the following:
(1) Check the power supply voltage.
(2) Check the indoor/outdoor connecting wire for mis-wiring.
2. Take care the following during service.
(1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and then after confirming the horizontal vane has completely closed, turn OFF the breaker.
(2) Be sure to unplug the power cord before removing the air inlet grille, the front panel, the cabinet, the top panel and the electronic control P.C. boards.
(3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.
(4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
3. Troubleshooting procedure
(1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.
(2) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration.
(3) When troubleshooting, refer to 9-2. “Instruction of troubleshooting” and 9-3. “Troubleshooting check table”.
4. How to replace batteries
Weak batteries may cause the remote controller malfunction.
In this case, replace the batteries to operate the remote controller normally.
1
Remove the front lid and insert batteries.
2
Press the RESET button with tip end of ball point
Then reattach the front lid.
pen or the like, and then use the remote controller.
Insert the negative pole of the batteries first.
Check if the polarity of the batteries are correct.
RESET button
NOTE : If the RESET button is not pressed, the remote controller may not operate correctly.
INFORMATION FOR MULTI SYSTEM AIR CONDITIONER
OUTDOOR UNIT : MXZ-A14WV MXZ-A18WV MXZ-A26WV MXZ-A32WV
Multi system air conditioner can connect two or more indoor units with one outdoor unit.
•Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not connect indoor units beyond the outdoor unit capacity.
Operation indicator lamp flashes as shown in the figure below.
•When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor units that will start the operation later cannot operate, indicating as shown in the figure below. In this case, please set all the indoor units to the same operation mode.
Operation Indicator lighted flashing
•When indoor units starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes
(max. 10 minutes) to blow out the warm air.
•In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant flowing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.
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9-2. Instruction of troubleshooting
Start
Indoor unit operates.
Outdoor unit doesn't operate.
Indoor unit operates.
Outdoor unit doesn't operate normally.
Indoor unit doesn't receive the signal from remote controller.
OPERATION INDICATOR lamp on the indoor unit is flashing on and off.
Outdoor unit operates only in Test Run operation.
w
Outdoor unit doesn't operate even in
Test Run operation.
w
Outdoor unit doesn't stop even if indoor unit stops.
Unit doesn't operate normal operation in
COOL or
HEAT mode.
Indoor unit operates, when the EMERGENCY
OPERATION switch is pressed.
Indoor unit doesn't operate, when the
EMERGENCY
OPERATION switch is pressed.
Check room temperature thermistor.
Refer to 9-6.
"Test point diagram and voltage".
Refer to
"Check of outdoor unit".
Refer to
"Check of outdoor unit".
Refer to
"Check of
R.V. coil".
Refer to 9-5.
B
"Check of remote controller and receiver
P.C. board".
1. Check indoor /
outdoor
connecting wire.
2. Refer to 9-5.
C
"Check of indoor
electronic control
P.C. board".
Flash on and off at 0.5second interval
Cause:
Indoor/
Outdoor unit
• Mis-wiring
or trouble of
serial signal
2-time flash
Cause:
Indoor unit
• Trouble of
room
temperature/
indoor coil
thermistor
4-time flash
Cause:
Indoor unit
• Trouble of
indoor
electric
P.C. board
MXZ type
5-time flash
Cause:
Outdoor unit
• Outdoor
power
system
abnormality
6-time flash
Cause:
Outdoor unit
• Trouble of
thermistor
in outdoor
unit
MXZ type
MUCFH-GA60VB
7-time flash
Cause:
Outdoor unit
• Trouble of
outdoor
control
system
Refer to 9-5.
E
"How to check miswiring and serial signal error (When outdoor unit doesn't work)".
Check room temperature thermistor and indoor coil thermistor.
Refer to 9-6.
"Test point diagram and voltage".
Refer to 9-5.
D
"Check of indoor electric control P.C. board".
Refer to
"Check of inverter/ compressor" and "Check of power supply".
Refer to
"Check of outdoor thermistor".
MUCFH-GA60VB
Replace the deicer
P.C. board.
MXZ type
Replace the outdoor electronic control
P.C. board.
w "Test Run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed.
Refer to outdoor unit service manual.
12
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9-3. Troubleshooting check table
OPERATION
INDICATOR lamp
Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
Self check table
NO.
Abnormal point
Indication Symptom Detect method
0.5-second ON
1
Mis-wiring or Serial signal
0.5-second OFF
Outdoor unit does not run.
Check point
When serial signal stops for 4 to 5 seconds.
● Check wiring (visual check and conductivity check).
● Check indoor electronic control
P.C.board.
● Check outdoor deicer P.C. board.
● Check electrical parts.
Indoor coil thermistor
2
Room temperature thermistor
2-time flash
2.5-second OFF
Outdoor unit does not run.
Detect Indoor coil/room temperature thermistor short or open circuit every 8 seconds during operation.
● Check resistance of thermistor.
● Reconnect connector.
● Check indoor electronic control P.C. board.
4-time flash
3
Indoor control
P.C.
board
Indoor unit does not run
When it cannot properly read data in the nonvolatile memory of the indoor electronic control
P.C. board.
● Check indoor electronic control P.C.
board.
2.5-second OFF
4
5
MCFH-
GA60VB
MXZ type
Outdoor control
P.C.
board
❈
6
Outdoor thermistor
MXZ type
Outdoor power system
❈
7
MXZ type
Operation mode setting
6-time flash
Outdoor unit does not run
When the outdoor thermistors short or open after the compressor start-up.
● Check outdoor deicer P.C. board.
● Check resistance of thermistor.
● Reconnect connector.
Refer to outdoor unit service manual.
2.5-second OFF
7-time flash
5-time flash
Operation Indicator
Lighted
Flashing
Outdoor unit does not run
When it cannot properly read data in the nonvolatile memory of the outdoor deicer
P.C. board or outdoor electronic control P.C. board.
● Check the outdoor deicer P.C. board or outdoor electronic control P.C. board.
Refer to outdoor unit service manual.
2.5-second OFF
2.5-second OFF
2.5-second OFF
Outdoor unit does not run
When the compressor operation is continuously three times interrupted by over current protection within
1 minute after start-up , it stops operation.
● Check the inverter output.
● Check the compressor.
Refer to outdoor unit service manual.
Outdoor unit operates but indoor unit does not operate.
When the operation mode of each indoor unit is differently set to COOL(includes DRY) and HEAT at same time, the operation mode of indoor unit that has operated at first has the priority.
● Unify the operation mode.
Refer to outdoor unit service manual.
❈ The indication is shown only when the indoor unit connects with the outdoor unit MXZ type.
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9-4. Trouble criterion of main parts
MCFH-GA35VB MCFH-GA50VB MCFH-GA60VB
Part name
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12)
Indoor fan motor
(MF)
INNER FUSE
145 i 5 : CUT OFF
Check method and criterion
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Normal
8k
Ω
~ 20k
Ω
Abnormal
Open or short-circuit
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Color of lead wire
WHT-BLK
BLK-YLW
YLW-BLU
BLU-BRN
BRN-RED
MCFH-GA35VB
175~190
Ω
66~72
Ω
45~50
Ω
30~33
Ω
22~24 Ω
Normal
MCFH-GA50VB
79~87
Ω
63~69
Ω
34~38
Ω
25~29
Ω
13~15 Ω
MCFH-GA60VB
80~88
Ω
44~49
Ω
35~39
Ω
43~47
Ω
13~15 Ω
Abnormal
Open or short-circuit
Vane motor
(MV)
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Normal Abnormal
328 ~ 356
Ω
Open or short-circuit
Figure
BLK YLW BLU BRN RED ORN
WHT
FUSE
GRN
YLW
RED
ROTOR
YLW
BRN
ORN GRN
14
OB380A.qxp 06.5.11 11:30 AM Page 15
9-5. Troubleshooting flow
Indoor fan does not operate.
A Check of indoor fan motor
No
Are lead wires connected?
Reconnect the lead wires.
Turn OFF power supply.
Check connector (Fan motor) visually.
Yes
No
Is soldered point of the connector correctly soldered?
Yes
Resolder it.
Disconnect lead wires from connector (Indoor fan motor).
Measure resistance between lead wires No.1 and No.4 and then No.3 and No.4 of the indoor fan motor.
Is resistance 0 (short circuit) or
∞
(open circuit)?
Yes ( 0 or
∞
)
Replace the indoor fan motor.
No
(others)
Replace the indoor electronic control
P.C. board.
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller.
B Check of remote controller and receiver P.C. board w Check if the remote controller is exclusive for this air conditioner.
Switch on the remote controller.
Is LCD display on remote controller visible?
Yes
Remove the batteries, then set them back and press the RESET button. Check if the unit operates with the remote controller.
No
(not clear)
Replace the batteries.(Refer to 9-4.)
Does the unit operate with remote controller?
OK
Yes
No Turn ON a radio to AM and press switch on remote controller.
Is noise heard from radio?
Yes
Are there any fluorescent lights of inverter or rapid-start type within the range of 1m?
No when remote controller button is pressed.
No
Yes
Replace the remote controller.
● Reinstall the unit away from lights.
● Attach a filter on receiving part.
–
Yes Replace the indoor electronic control
P.C. board.
Is the voltage approx. 4V DC ?
No(5V or 0V DC)
Replace the receiver P.C. board.
15
OB380A.qxp 06.5.11 11:30 AM Page 16
The unit does not operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
C Check of indoor electronic control P.C. board
Check both “parts side”and “pattern side” of indoor electronic control P.C.
board visually.
Replace the fuse.
Yes
Is fuse(F11)blown?
No
Is varistor(NR11)burnt?
Yes
Replace the varistor.
No
When OPERATION INDICATOR lamp flashes 4 - time.
Indoor unit does not operate.
D Check of indoor electronic control P.C. board
Trouble of the indoor electronic control P.C. board.
Turn OFF the power supply.
Replace the indoor electronic control P.C. board.
16
OB380A.qxp 06.5.11 11:30 AM Page 17
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.
Outdoor unit does not operate.
E How to check mis-wiring and serial signal error (when outdoor unit does not work)
Start
Make them sure.
Yes
Is this mis-wiring, poor contact, or disconnection of wire?
No
1. Turn OFF the power supply (indoor/outdoor unit) and disconnect indoor and outdoor connecting wire on indoor side.
2. Short-circuit between indoor terminal block N and 3 .
3. Turn ON the power supply (indoor unit) and press once EMERGENCY OPERATION switch.
Is there 20V DC between both ends of
R132 on indoor electronic control P.C. board ?
( By tester, the stylus is between 0 ~ 20V. )
Yes
•Turn OFF the power supply (indoor unit).
•Connect ON indoor and outdoor connecting wire.
No
Replace the indoor electronic control P.C. board.
Turn ON the power supply (outdoor unit).
Is there 230V AC between outdoor terminal block L N (TB1)?
Yes
No
Check the outdoor power supply, power supply cord and connection.
Is there 5V DC between J205 + –J101 - (MUCFH-GA35VB/GA50VB)/
J101 + –J401 - (MUCFH-GA60VB) on the deicer P.C. board?
No
Replace the deicer P.C. board.
Yes
Turn ON the power supply (indoor unit).
During EMERGENCY OPERATION, is there 10V DC between both ends of R601?
(By tester, the stylus is between 5 ~10V)
Yes
No
Make the wiring between CN730 on the deicer P.C. board and outdoor terminal block correct.
Replace the deicer P.C. board.
Refer to outdoor unit service manual.
17
OB380A.qxp 06.5.11 11:30 AM Page 18
9-6. Test point diagram and voltage
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
Indoor electronic control P.C. board
Fan motor power supply 230V AC
Very
Low Low
7 5
Med.
High
6 4 3 2 1 8
Fuse (F11)
250V AC
3.15A
Varistor (NR11)
Power supply input 230V AC
R132 about 20V DC
(Refer to 9-5.
E
.)
+
–
}
5V DC
–
+
}
12V DC
Solder jumper wire to the
JR07 on the indoor electronic control P.C. board.
(Refer to 8-3.)
Room temperature thermistor (RT11)
Time short point JPG and JPS
(Refer to 8-1.)
Indoor coil thermistor (RT12)
Indoor coil thermistor (RT12)
Room temperature thermistor (RT11)
40
EMERGENCY OPERATION switch
30
Receiver P.C.
board connector
(CN101)
RT11
TH113
DE00R697B
Room temperature thermistor(RT11)
CH313
To the indoor electronic control
P.C.board CN113
20
10
1 2
0
0 10 20 30 40 50 60
Temperature ( C)
18
OB380A.qxp 06.5.11 11:30 AM Page 19
10 DISASSEMBLY INSTRUCTIONS
<"Terminal with locking mechanism" Detaching points>
The terminal which has the locking mechanism can be detached as shown below.
There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism.
The terminal without locking mechanism can be detached by pulling it out.
Check the shape of the terminal before detaching.
(1) Slide the sleeve and check if there is a locking lever or not.
(2) The terminal with this connector has the locking
mechanism.
Sleeve
Locking lever
1
2
Slide the sleeve.
Pull the terminal while
pushing the locking
lever.
1
Hold the sleeve, and
pull out the terminal
slowly.
Connector
10-1.MCFH-GA35VB MCFH-GA50VB MCFH-GA60VB
OPERATING PROCEDURE
1. Removing the electronic control P. C . board.
(1) Pull out the upper part of the grille. (See Photo 1.)
(2) Remove the screws of the grille.
(3) Remove screws of terminal block cover.
Remove the terminal block cover and remove the terminal block.
(4) Remove the screws of the electronic box cover.
(5) Pull out the electronic control P. C. board.
Photo 1
Photo 3
Photo 2
PHOTOS
Screws
Electronic control P.C. board
Electronic box Terminal block
19
OB380A.qxp 06.5.11 11:30 AM Page 20
OPERATING PROCEDURE
2. Removing the indoor fan motor
(1) Remove the grille. (Refer to 1(1) (2).)
(2) Remove the fan casing.(upper)
(3) Disconnect the connector of the indoor fan motor.
(4) Disconnect the earth wire of the fan motor.
(5) Remove the screws of the motor band and remove the catch.
(6) Take out the sirocco fan and the indoor fan motor.
Photo 4
Fan casing
(upper)
PHOTOS
Motor band
Indoor fan motor
Screws
Fan casing(upper)
3. Removing the indoor heat exchanger.
(1) Remove the grille. (Refer to 1(1) (2).)
(2) Remove the screws on both side and in front of the front panel. (See Photo 5.)
(3) Remove the screws of the nozzle assembly. (See Photo 6.)
(4) Remove the electronic box. (Refer to 1.)
(5) Remove the indoor fan motor. (Refer to 2.)
(6) Remove the screws of the motor support .
(7) Remove the fan casing. (Iower)
(8) Remove the insulation of the drain pan and remove the screws. (See Photo 7.)
(9) Remove the screws under the drain pan. (See Photo 8.)
(10) Remove the drain pan.
(11) Remove the indoor heat exchanger.
Photo 5
Screws
Photo 7
Photo 6
Insulation and screws
Screws
Photo 8
20 screws
OB380A.qxp 06.5.11 11:30 AM Page 21
11 PARTS LIST (non-RoHS compliant)
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
11-1. INDOOR UNIT
STRUCTURAL PARTS
15 14 13
1
2
3
4
9
12
11
10
8
7
5 6
9
10
11
12
13
1
2
3
4
7
8
5
6
Part number that is circled is not shown in the illustration.
No.
Part No.
Part name
Q'ty/unit
Symbol in Wiring
Diagram
MCFH-GA35VB
- E1
MCFH-GA50VB
- E1
MCFH-GA60VB
- E1
14
15
16
E02 227 303
E02 179 971
E02 179 100
E02 179 010
E02 179 000
E02 215 700
E02 179 237
E02 179 238
E02 179 667
E02 138 666
E02 179 972
E02 138 667
E02 179 231
E02 227 235
E02 823 620
E02 824 620
E02 227 040
E02 179 142
VANE MOTOR
INSTALLATION METAL (L)
AIR FILTER
GRILLE
FRONT PANEL
DRAIN PAN
FAN CASING (U)
FAN CASING (L)
UNION (GAS)
UNION (GAS)
INSTALLATION METAL (R)
UNION (LIQUID)
BACK PANEL (IN)
NOZZLE
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
VANE
GRILLE CATCH
MV
1
2
2
1
1
1
1
1
2
1
1
1
1
1
1
3
1
2
2
1
1
1
1
1
2
1
1
1
1
1
1
3
1
1
1
1
2
1
2
2
1
1
1
1
1
1
1
3
Remarks
1PCE/SET
1PCE/SET
1PCE/SET
{ 12.7
{ 15.88
{ 6.35
3PCS/SET
21
OB380A.qxp 06.5.11 11:31 AM Page 22
3
2
1
1
2
PARTS LIST (non-RoHS compliant)
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
11-2. INDOOR UNIT
ELECTRICAL PARTS
9 8 7 6 5 4
11-3. ACCESSORY AND
REMOTE CONTROLLER
12 13
11-2. INDOOR UNIT ELECTRICAL PARTS
Part numbers that are circled are not shown in the illustration.
No.
1
2
3
8
9
10
11
6
7
4
5
Part No.
E02 179 500
E02 179 505
E02 228 300
E02 229 300
E02 684 300
E02 826 375
E02 823 375
E02 227 468
E02 327 307
E02 826 452
E02 827 452
E02 828 452
E02 215 328
E02 820 385
E02 127 382
Part name
SIROCCO FAN
FAN MOTOR RUBBER MOUNT
INDOOR FAN MOTOR
INDOOR FAN MOTOR
INDOOR FAN MOTOR
TERMINAL BLOCK
TERMINAL BLOCK
RECEIVER P.C. BOARD
INDOOR COIL THERMISTOR
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
SWITCH & ROOM TEMPERATURE THERMISTOR P.C. BOARD
VARISTOR
FUSE
Q'ty/unit
Symbol in Wiring
Diagram
MCFH-GA35VB
- E1
MCFH-GA50VB
- E1
MCFH-GA60VB
- E1
2
2
1
2
2
2
2
MF
MF
MF
TB2
TB1
DISP/RECEIVER
P.C. BOARD
RT12
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SW/THERMO
P.C. BOARD
NR11
F11
1
1
1
1
1
1
1
1
1
1
Remarks
1PCE/SET
2PCS/SET
RB4V25-
RB4V36-
RB4V36-
3P
3P
3.15A
11-3. ACCESSORY AND REMOTE CONTROLLER
12
13
E02 826 426
E02 527 083
REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER
1
1
1
1
1
1
KM04M
22
OB380A.qxp 06.5.11 11:31 AM Page 23
12 RoHS PARTS LIST (RoHS compliant)
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
12-1. INDOOR UNIT
STRUCTURAL PARTS
15 14 13
1
2
3
4
9
12
11
10
8
7
5 6
9
10
11
12
13
1
2
3
4
7
8
5
6
Part number that is circled is not shown in the illustration.
No.
Part No.
Part name
Q'ty/unit
Symbol in Wiring
Diagram
MCFH-GA35VB
- E1
MCFH-GA50VB
- E1
MCFH-GA60VB
- E1
14
15
16
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
E12 227 303
E12 179 971
E12 179 100
E12 179 010
E12 179 000
E12 215 700
E12 179 237
E12 179 238
E12 179 667
E12 138 666
E12 179 972
E12 138 667
E12 179 231
E12 227 235
E12 823 620
E12 824 620
E12 825 620
E12 227 040
E12 179 142
VANE MOTOR
INSTALLATION METAL (L)
AIR FILTER
GRILLE
FRONT PANEL
DRAIN PAN
FAN CASING (U)
FAN CASING (L)
UNION (GAS)
UNION (GAS)
INSTALLATION METAL (R)
UNION (LIQUID)
BACK PANEL (IN)
NOZZLE
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
VANE
GRILLE CATCH
MV
1
2
2
1
1
1
1
1
2
1
1
1
1
1
1
3
1
2
2
1
1
1
1
1
2
1
1
1
1
1
1
3
1
1
1
1
2
1
2
2
1
1
1
1
1
1
1
3
Remarks
1PCE/ SET
1PCE/ SET
1PCE/ SET
{ 12.7
{ 15.88
{ 6.35
3PCS/SET
23
OB380A.qxp 06.5.11 11:31 AM Page 24
3
2
1
1
2
RoHS PARTS LIST (RoHS compliant)
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
12-2. INDOOR UNIT
ELECTRICAL PARTS
9 8 7 6 5 4
12-3. ACCESSORY AND
REMOTE CONTROLLER
12 13
12-2. INDOOR UNIT ELECTRICAL PARTS
Part numbers that are circled are not shown in the illustration.
No.
3
6
7
4
5
1
2
8
9
10
11
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
Part No.
E12 179 500
E12 179 505
E12 228 300
E12 229 300
E12 684 300
E12 826 375
E12 823 375
E12 227 468
E12 327 307
E12 826 452
E12 827 452
E12 828 452
E12 215 328
E12 820 385
E12 A49 382
Part name
SIROCCO FAN
FAN MOTOR RUBBER MOUNT
INDOOR FAN MOTOR
INDOOR FAN MOTOR
INDOOR FAN MOTOR
TERMINAL BLOCK
TERMINAL BLOCK
RECEIVER P.C. BOARD
INDOOR COIL THERMISTOR
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
ELECTRONIC CONTROL P.C. BOARD
SWITCH & ROOM TEMPERATURE
THERMISTOR P.C. BOARD
VARISTOR
FUSE
Q'ty/unit
Symbol in Wiring
Diagram
MCFH-GA35VB
- E1
MCFH-GA50VB
- E1
MCFH-GA60VB
- E1
2
2
1
2
2
2
2
MF
MF
MF
TB2
TB1
DISP/RECEIVER
P.C. BOARD
RT12
SW/THERMO
P.C. BOARD
NR11
F11
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Remarks
1PCS/SET
2PCS/SET
RB4V25-
RB4V36-
RB4V36-
3P
3P
3.15A
12-3. ACCESSORY AND REMOTE CONTROLLER
12
13
G
G
E12 826 426
E12 527 083
REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER
1
1
1
1
1
1
KM04M
24
OB380A.qxp 06.5.11 11:31 AM Page 25
13 OPTIONAL PARTS
13-1. AIR CLEANING FILTER
● If the air cleaning filter is clogged, it may lower the unit’s capacity or cause condensation at the air outlet .
● The air cleaning filter is disposable . The standard usable term is about 4 months . However , if the color of the filter turns to dark brown , replace soon .
Remove the air filter and the air cleaning filter together.
Separate the air cleaning filter
(white bellows type) from the air filter.
Models
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
Part No.
MAC - 1200 FT
13-2. DEODORIZING FILTER
● Clean the filter every two weeks . When it becomes too dirt , clean it more often .
● Replace the filter with a new one when its color can not be restored even after washing or when the filter becomes dark.
● Standard interval for the filter replacement is about 1 year .
Separate the deodorizing filter (gray sponge type) from the air filter.
Remove the air filter and the deodorizing filter together.
Models
MCFH-GA35VB
MCFH-GA50VB
MCFH-GA60VB
Part No.
MAC - 1700 DF
25
OB380A.qxp 06.5.11 11:31 AM Page 26
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OB380A.qxp 06.5.11 11:31 AM Page 27
27
OB380A.qxp 06.5.11 11:31 AM Page 28
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
C
Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in May 2006. No.OB380 REVISED EDITION-A 6
Distributed in Jan. 2005. No.OB380 6
Made in Japan
New publication, effective May 2006
Specifications subject to change without notice.
Public link updated
The public link to your chat has been updated.
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