Mitsubishi Electric MCF-GA35VB Manuel utilisateur

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)

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

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

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

Q'ty

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

OB382--1.qxp 04.12.21 16:45 Page 2

MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1

REMOTE CONTROLLER

ON/OFF

TOO

COOL

TOO

WARM

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

STOP

START

HR.

MIN.

I FEEL

COOL

DRY

CLOCK

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.

OB382--1.qxp 04.12.21 16:45 Page 3

SPECIFICATION

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(kW)

rpm

MCF-GA50VB - E1

Cooling

Single phase

230V, 50Hz

780 / 636W/ 492W

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

46 /41W/36W

1,240 /1,060W/845W

KM04N

MCF-GA60VB - E1

Cooling

Single phase

230V, 50Hz

840/ 744W/ 642W

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

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

OB382--1.qxp 04.12.21 16:45 Page 4

NOISE CRITERIA CURVES

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

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

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

OB382--1.qxp 04.12.21 16:45 Page 5

WIRING DIAGRAM6

INDOOR UNIT

TAB12

HIC1

ELECTRONIC CONTROL P.C BOARD

WHT

DISP/

P.C.BOARD

RECEIVER

12V

REMOTE

CONTROLLER

SW/THERMO

P.C.BOARD

RT11

F11

CIRCUIT BREAKER

SUPPLY

OUTDOOR

UNIT

CONNECTING

50Hz

~/N 230V

POWER

1TB2

PE TB1 GRN/YLW

CN202

CN201

BLK

BRN

BLU

NR11

YLW

BLU

SR142

SR143

LDFM

LDFL

GRN/YLW

8BRN

BLU

WHT

RED

ORN

BLK

LDCOM

C11

X144

LDC12

LDFH

LDC11

112

2 2

WHT

1RED

ORN

BLK

RT12

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

NR11

RT11

RT12

C11

F11

HIC1

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

(When installed on the floor)

(When installed on the ceiling)

500mm or more

1000mm or more

650

616.5

80.8 906 112.8

114

1100

113

143

180

17042.5

[

12.7 (MCF-GA35/GA50VB)

[

15.88 (MCF-GA60VB)

Gas line

[

6.35

Liquid line

Wireless remote controller

162

INDOOR UNIT

MCF-GA35VB - MCF-GA60VB -

MCF-GA50VB - E1

E1E1 Unit: mm

MCF-GA35VB - MCF-GA50VB - MCF-GA60VB - E1E1E1

OB382--1.qxp 04.12.21 16:45 Page 6

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

OB382--1.qxp 04.12.21 16:45 Page 7

SERVICE FUNCTIONS

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

Solder J2

–

4 units operation

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.

OB382--1.qxp 04.12.21 16:45 Page 8

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

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

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