Mitsubishi Electric MCF-GA35VB User manual

SERVICE MANUAL
CONTENTS
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 ············································6
7. REFRIGERANT SYSTEM DIAGRAM················7
8. SERVICE FUNCTIONS ······································8
9. TROUBLESHOOTING······································10
10. DISASSEMBLY INSTRUCTIONS·····················15
11. PARTS LIST······················································17
12. OPTIONAL PARTS···········································19
Wireless type
Models
MCF-GA35VB - (WH)
MCF-GA50VB - (WH)
MCF-GA60VB - (WH)
E1
E1
E1
No. OB382
(When installed on the ceiling)
(When installed on the floor)
FLOOR AND CEILING TYPE AIR CONDITIONERS
Indication of
model name
MCF-GA35VB -
MCF-GA50VB -
MCF-GA60VB - E1
E1
E1
NOTE:
• This service manual describes technical data of indoor units
• As for outdoor units MUCF-GA35VB - ,MUCF-GA50VB - and MUCF-GA60VB - , refer to
the service manual OB383. E1E1E1
OB382--1.qxp 04.12.21 16:45 Page 1

TECHNICAL CHANGES
2
1
PART NAMES AND FUNCTIONS
INDOOR UNIT
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
(When installed on the floor)
(When the air inlet grille is opened.)
Deodorizing filter
(Gray sponge type)(option)
Air filter
Remote controller
Air inlet
Operation section
Air cleaning filter
(White bellows type)(option)
Front panel
Receiving section
Operation indicator lamp
Horizontal vane
Vertical vanes
Emergency
operation switch
(When installed on the ceiling)
ACCESSORIES
Item
Installation plate
Unit fixing screw
5 o12mm
Wireless remote
controller
Remote controller
holder
Fixing screw for
3.5 o16mm (Black)
Battery (AAA) for
remote controller
Drain hose
Drain pipe cover
Knockout cover
Screw for 4 o10mm
2
2
1
1
2
2
1
1
1
2
Q'ty
2
MCF-A12WV - ➔MCF-GA35VB -
1. Model name has been changed.
MCF-A18WV - ➔MCF-GA50VB -
1. Model name has been changed.
MCF-A24WV - ➔MCF-GA60VB -
1. Model name has been changed.
E1E1
E1E1
E1E1
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3
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
REMOTE CONTROLLER
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
STOP
START
HR.
MIN.
I FEEL COOL
DRY
PM
CLOCK
AM
RESET CLOCK
FAN
ECONO COOL
ECONO COOL button
Open the front lid.
Signal transmitting section
Operation display section
OPERATE /STOP
(ON /OFF)button
TEMPERATURE buttons
OPERATION SELECT button
FAN SPEED CONTROL button OFF-TIMER button
HR. button
MIN. button
(TIME SET button)
ON-TIMER button
RESET button VANE CONTROL button
CLOCK SET button
Indication of remote controller model
is on back.
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SPECIFICATION
4
3
Indoor model
Function
Power supply
Air flow (High/Med.W/LowW)
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Fan motor current
Model
Winding
resistance(at 20:)
Dimensions WOHOD
Weight
Air direction
Sound level
(High/Med.W/LowW)
Fan speed
(High/Med.W/LowW)
Fan speed regulator
Thermistor RT11(at 25:)
Thermistor RT12(at 25:)
Remote controller model
K/h
A
A
W
A(kW)
%
A
"
mm
kg
dB
rpm
k"
k"
MCF-GA50VB - E1
Cooling
Single phase
230V, 50Hz
780 / 636W/ 492W
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
1,100O650O180
25
5
46 /41W/36W
1,240 /1,060W/845W
3
10
10
KM04N
MCF-GA60VB - E1
Cooling
Single phase
230V, 50Hz
840/ 744W/ 642W
0.36
80
97
0.36
RB4V36-DB
WHT-BLK 84 BLK-YLW 46.2
YLW-BLU 37.2 BLU-BRN 45.2
BRN-RED 13.6
48 /45W/42W
1,320 /1,190W/1,060W
Electrical data
Fan motor
Special remarks
Capacity
MCF-GA35VB - E1
Cooling
Single phase
230V, 50Hz
678 /582W/474 W
0.26
56
94
0.26
RB4V19-AC
WHT-BLK 203.2 BLK-YLW 45.9
YLW-BLU 32.7 BLU-BRN 44.4
BRN-RED 23.3
44 /40W/34W
1,105 /970W/820W
NOTE:Test conditions are based on ISO 5151.
Cooling : Indoor DB27°C WB19°C
Outdoor DB35°C WB(24°C)
Indoor-Outdoor piping length : 5m
WReference value
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5
NOISE CRITERIA CURVES
4
NOISE CRITERIA CURVES
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
Test conditions,
Cooling : Dry-bulb temperature 27:Wet-bulb temperature 19:
High 46
SPL(dB(A)) LINE
FAN SPEED
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
Test conditions,
Cooling : Dry-bulb temperature 27:Wet-bulb temperature 19:
High 44
SPL(dB(A)) LINE
FAN SPEED
MCF-GA35VB - E1 MCF-GA50VB - E1
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
Test conditions,
Cooling : Dry-bulb temperature 27:Wet-bulb temperature 19:
High 48
SPL(dB(A)) LINE
FAN SPEED
INDOOR UNIT
WALL
1m 1m
MICROPHONE
MCF-GA60VB - E1
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WIRING DIAGRAM6
INDOOR UNIT
TAB12
HIC1
ELECTRONIC CONTROL P.C BOARD
1
WHT
DISP/
P.C.BOARD
RECEIVER
12V
REMOTE
CONTROLLER
2
4
5
SW/THERMO
P.C.BOARD
MV
5
2
5
6
RT11
F11
CIRCUIT BREAKER
SUPPLY
TO
OUTDOOR
UNIT
CONNECTING
50Hz
~/N 230V
POWER
1TB2
L
N
PE TB1 GRN/YLW
1
CN202
CN201
BLK
BRN
3
2
BLU
NR11
YLW
4
YLW
BLU
SR142
SR143
LDFM
LDFL
GRN/YLW
8BRN
BLU
6
7
5
WHT
RED
ORN
BLK
LDCOM
C11
X144
LDC12
LDFH
LDC11
CN
112
2 2
WHT
1RED
ORN
BLK
3
2
RT12
MF
CN
101 CN 113 CN 151
SOLID STATE RELAY
TERMINAL BLOCK
RELAY
SR142~SR143
TB1, TB2
X144
VANE MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR
MV
NR11
RT11
RT12
C11
F11
HIC1
MF
INDOOR FAN CAPACITOR
FUSE (3.15A)
DC/DC CONVERTER
INDOOR FAN MOTOR(INNER FUSE)
SYMBOL SYMBOL SYMBOLNAME NAME NAME
MODELS WIRING DIAGRAM
NOTE: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
OUTLINES AND DIMENSIONS
6
5
(When installed on the floor)
(When installed on the ceiling)
500mm or more
500mm or more
500mm or more
500mm or more
1000mm or more
650 616.5
80.8 906 112.8
114
16
1100
93
77
113 143
180
17042.5
[ 12.7 (MCF-GA35/GA50VB)
[ 15.88 (MCF-GA60VB)
Gas line
[ 6.35
Liquid line
Wireless remote controller
162
19
58
INDOOR UNIT
MCF-GA35VB - MCF-GA60VB -
MCF-GA50VB - E1
E1E1 Unit: mm
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
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7
REFRIGERANT SYSTEM DIAGRAM7
INDOOR UNIT
MCF-GA60VB - E1
Indoor
heat
exchanger
Distributor Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant flow in cooling
Refrigerant flow in heating
Refrigerant pipe [15.88
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Indoor
heat
exchanger
Distributor Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Flared connection
Refrigerant pipe [12.7
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
INDOOR UNIT
MCF-GA35VB - E1
Indoor
heat
exchanger
Distributor Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Flared connection
Refrigerant pipe [12.7
(with heat insulator)
Refrigerant pipe
[6.35
(with heat insulator)
INDOOR UNIT
MCF-GA50VB - E1 Unit : mm
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SERVICE FUNCTIONS
8
8
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
Remote controller model : KM04N
J1 J2
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;
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
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.
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 will 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.
NOTE : For remodelling, take out the bat-
teries 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.
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9
How to release “AUTO RESTART FUNCTION”
1Turn off the main power for the unit.
2Pull out the electronic control P.C. board. (Refer to 10.)
3Solder jumper wire to the JR07 on the indoor electronic
control P.C. board. (Refer to 9-6..)
JR07
CN151CN113CN112
CN101
CN105
SW2
CN102
CN201
SW1
IC101
C11
TAB12
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.
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.
8-3. AUTO RESTART FUNCTION
Operation
1If the main power (230V AC) has been cut, the operation settings remain.
2After 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.)
OB382--1.qxp 04.12.21 16:45 Page 9

TROUBLESHOOTING
10
9
Insert the negative pole
of the batteries first.
Check if the polarity of
the batteries are correct.
RESET button
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.
1Remove the front lid and insert batteries.
Then reattach the front lid. 2Press the RESET button with tip end of ball point pen or the like, and then use the remote controller.
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
NOTE : If the RESET button is not pressed, the remote controller may not operate correctly.
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 servicing.
(1) Before servicing the air conditioner, be sure to turn off the main unit first with the remote controller, and then after con-
firming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.
(2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic
control P.C. board.
(3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the com-
ponents.
(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)Before servicing that the connector and terminal are connected properly.
(3) 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.
(4) When troubleshooting, refer to 9-2. “Instruction of troubleshooting” and 9-3. “Troubleshooting check table”.
OB382--1.qxp 04.12.21 16:45 Page 10

11
9-3. Troubleshooting check table
❈ Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
Self check table
9-2. Instruction of troubleshooting
OPERATION INDICATOR
lamp
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
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 in
only Test Run
operation.
Outdoor unit
doesn't
operate
even in
Test Run
operation.
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".
Check of
wiring
diagram of
outdoor
unit.w
Refer to 9-5.B
"Check of
remote
controller
and receiver
P.C. board".
Refer to 9-5.C
"Check of
indoor
electronic
control
P.C. board".
2-time flash
Cause:
Indoor unit
• Trouble of
room
temperature/
indoor coil
thermistor
Check room
tempreture
thermistor and
indoor coil
thermistor.
Refer to 9-6.
"Test point
diagram and
voltage".
When the
remote
controller is
pressed
or when the
EMERGENCY
OPERATION
switch is
pressed,
the fan doesn't
rotate, with
OPERATION
INDICATOR
lamp on.
Refer to 9-5.A
"Check of
indoor fan
motor".
As for outdoor unit MUCF type, refer to service manual OB383.
wBefore checking the outdoor unit, make sure if
any signal or power is being transmitted from
the indoor unit.
4-time flash
Cause:
Indoor unit
• Trouble of
indoor unit
control
system
Replace the
indoor
electronic
control
P.C. board.
No.
1
SymptomOperation indicator lamp Detection method
Checkpoint
Indoor coil
thermistor
Abnormal
point
Room
temperature
thermistor
2-time flash
2.5-second OFF
Detect Indoor coil/room temperature
thermistor short or open circuit.
• Check the resistance of
thermistor.
• Reconnect the connector.
• Check the indoor electronic
control P.C.
Outdoor unit
does not
operate.
2
4-time flash
2.5-second OFF
Indoor
control
system
When it cannot properly read data in the
nonvolatile memory of the indoor electronic
control P.C. board.
Outdoor unit
does not
operate. • Check the indoor electronic
control P.C. board.
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12
Check of indoor fan motor
A
Indoor fan does not operate.
Replace the indoor fan motor.
Disconnect lead wires from connector (Fan motor).
Measure resistance between lead wires No.1 and No.4 and then No.3 and No.4 of the fan motor.
Are lead wires connected?
Reconnect the lead
wires.
Replace the indoor electronic control
P.C. board.
Resolder it.
Is resistance 0 (short circuit) or ∞(open circuit)?
Yes ( 0 or ∞)No
(others)
Yes
No
Yes
No
Abnormal
Open or
short-circuit
MCF-GA60VB
80 ~ 88Ω
44 ~ 49Ω
35 ~ 39Ω
43 ~ 47Ω
13 ~ 15Ω
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Room
temperature
thermistor (RT11)
9-4. Trouble criterion of main parts
Part name
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)
Figure
Normal
8kΩ~ 20kΩAbnormal Open or short-circuit
Vane
motor
(MV)
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
BLK RED ORNYLW BLU BRN WHT
GRN
YLW
FUSE
YLW
GRNORN
BRN
RED ROTOR
Normal
MCF-GA50VB
WHT-BLK MCF-GA35VB 175 ~ 190Ω195 ~ 212Ω
BLK-YLW 66 ~ 72Ω44 ~ 48Ω
YLW-BLU 45 ~ 50Ω31 ~ 34Ω
BLU-BRN 30 ~ 33Ω42 ~ 47Ω
BRN-RED 22 ~ 24Ω22 ~ 25Ω
Color of lead
wire
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
Normal
329 ~ 357ΩAbnormal
Open or short-circuit
Turn OFF power supply.
Check connector (Fan motor) visually.
Is soldered point of the connector
correctly soldered?
9-5. Troubleshooting flow
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13
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote con-
troller.
●Reinstall the unit away from lights.
●Attach a filter on receiving part.
Switch on the remote controller
Is LCD display on remote controller
visible? Replace the batteries.(Refer to 9-1..)
Remove batteries and then set them back and press
the RESET button. Check if the unit operates with
remote controller.
Does the unit operate with remote controller?
Turn on a radio toAM and press
switch on remote controller.
Is noise heard from radio? Replace the remote controller.
Are there any fluorescent lights
of inverter or rapid-start type
within the range of 1m?
Measure the voltage between receiver P.C.board connector No.2(+)and No.1 when remote controller button is pressed.
Is the voltage approx. 4V DC?
No
(5V DC or 0V DC)
Replace the receiver.
No
(not clear)
Yes
Yes
No
OK
No
Yes
Yes
Yes
No
Replace the indoor
electronic control P.C. board.
No
wCheck if the remote controller is exclusive for this air conditioner.
Check of indoor electronic control P.C. board
C
The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
Replace the fuse.
Trouble of the indoor electronic
control P.C. board.
Yes
No
No
Yes
Is fuse(F11)blown?
Be sure to check both fuse
and varistor in any case.
Is varistor(NR11)burnt?
Replace the varistor.
Check of remote controller and receiver P.C. board
B
Check both “parts side”and “pattern
side” of indoor electronic control P.C.
board visually.
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14
DE00R697B
To the indoor
electronic control
P.C.board CN113
Indoor coil thermistor (RT12)
Room temperature thermistor (RT11)
RT11
EMERGENCY OPERATION switch
TH113 CH313
GILMS
1 2
0
0
10
20
30
40
10 20 30 40 50 60
Temperature ( C)
Resistance (K')
9-6. Test point diagram and voltage
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1
Indoor electronic control P.C. board
Fan motor power supply 230V AC
6 5 4 3 2 1
Med. High Fuse (F11)
250V AC
3.15A
Power supply
input 230V AC
12V DC
5V DC
–
+
+
–
Time short point JPG and JPS
(Refer to 8-1..)
Indoor coil thermistor (RT12)
Room temperature
thermistor(RT11)
Low
Release of “AUTO RESTART
FUNCTION”
Solder jumper wire to the JR07.
(Refer to 8-3..)
}
}
Room temperature thermistor (RT11)
Varistor (NR11)
– +
Receiver P.C.
board connector
(CN101)
No.2 No.1
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15
DISASSEMBLY INSTRUCTIONS10
OPERATING PROCEDURE PHOTOS
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.
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 ground 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 1
Photo 2
Photo 4
Screws
Electronic box
Fan casing
(upper)
Indoor fan motor
Screws Fan
casing(upper)
Motor band
Terminal block
MCF-GA35VB - MCF-GA50VB - MCF-GA60VB -
INDOOR UNIT E1E1E1
Photo 3
Grille
Electronic control P.C. board
(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking
mechanism.
1Slide the sleeve.
2Pull the terminal while
pushing the locking
lever.
1Hold the sleeve, and
pull out the terminal
slowly.
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.
<"Terminal with locking mechanism" Detaching points>
Connector
Sleeve
Locking lever
OB382--1.qxp 04.12.21 16:45 Page 15

16
OPERATING PROCEDURE PHOTOS
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
Photo 6
Photo 7
Photo 8
Screws
Insulation of drain pan and screws
screws
Screws
Front panel
Nozzle assembly
Drain pan
OB382--1.qxp 04.12.21 16:45 Page 16

17
PARTS LIST11
Part number that is circled is not shown in the illustration.
Q'ty/unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VANE MOTOR
INSTALLATION METAL (L)
AIR FILTER
GRILLE (WH)
FRONT PANEL (WH)
DRAIN PAN
FAN CASING (U)
FAN CASING (L)
UNION (GAS)
UNION (GAS)
INSTALLATION METAL (R)
UNION (LIQUID)
BACK PANEL (IN)
NOZZLE (WH)
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
VANE (WH)
GRILLE CATCH (WH)
{12.7
{15.88
{6.35
3PCS/SET
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
3
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
3
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
3
MV
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
No. Part No. RemarksPart name Symbol
in Wiring
Diagram - E1
(WH)
MCF-GA35VB - E1
(WH)
MCF-GA50VB - E1
(WH)
MCF-GA60VB
MCF-GA35VB - (WH)
MCF-GA50VB - (WH)
MCF-GA60VB - (WH)
E1
E1
E1
2
15
12
1314
1
11-1. INDOOR UNIT
STRUCTURAL PARTS
11
10
9
8
7
65
3
4
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18
Part numbers that are circled are not shown in the illustration.
984
6
7
1
2
3
4
5
6
7
8
9
10
11
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
2
2
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
MF
MF
MF
TB2
TB1
RT12
NR11
F11
REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER
SW/THERMO
P.C. BOARD
Q'ty/unit
E02 179 500
E02 179 505
E02 227 300
E02 228 300
E02 684 300
E02 824 375
E02 823 375
E02 227 468
E02 324 307
E02 823 452
E02 824 452
E02 825 452
E02 215 328
E02 820 385
E02 127 382
No. Part No. RemarksPart name Symbol
in Wiring
Diagram
2PCS/SET
RB4V19-
RB4V25-
RB4V36-
3P
3P
3.15A
12
13 1 11 11 1
E02 823 426
E02 527 083
DISP/RECEIVER
P.C. BOARD
- E1
(WH)
MCF-GA35VB - E1
(WH)
MCF-GA50VB - E1
(WH)
MCF-GA60VB
KM04N
3
11-2. INDOOR UNIT
ELECTRICAL PARTS
1312
11-3. ACCESSORY AND REMOTE CONTROLLER
11-3. ACCESSORY AND
REMOTE CONTROLLER
11-2. INDOOR UNIT ELECTRICAL PARTS
MCF-GA35VB - (WH)
MCF-GA50VB - (WH)
MCF-GA60VB - (WH)
E1
E1
E1
2
2
1
1
5
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19
OPTIONAL PARTS12
12-2. 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.
12-1. 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
deodorizing
filter together.
Separate the deodorizing
filter (gray sponge type)
from the air filter.
Remove the air
filter and the
air cleaning filter
together.
Separate the air
cleaning filter
(white bellows type)
from the air filter.
Models
MCF-GA35VB -
MCF-GA50VB -
MCF-GA60VB - E1
E1
E1
Part No.
MAC - 1200 FT
Models
MCF-GA35VB -
MCF-GA50VB -
MCF-GA60VB - E1
E1
E1
Part No.
MAC - 1700 DF
OB382--1.qxp 04.12.21 16:46 Page 19

New publication, effective Dec. 2004
Specifications subject to change without notice.
CCCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
Distributed in Dec. 2004. No.OB382 6
Made in Japan
HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN
OB382--1.qxp 04.12.21 16:46 Page 20