Mitsubishi Electric MCFH-A12WV Manuel utilisateur

SERVICE MANUAL

Wireless type

Models

MCFH-A12WV- (WH)

MCFH-A18WV- (WH)

MCFH-A24WV- (WH)

No. OB336

(When installed on the ceiling)

(When installed on the floor)

FLOOR AND CEILING TYPE AIR CONDITIONERS

NOTE:

• This manual describes technical data of indoor units

• As for outdoor units MUCFH-A18/A24WV- , refer to the service manual OB337.

• As for outdoor unit MUH-A12YV- , refer to the service manual OB331.

• As for outdoor units MXZ-A18/A26/A32WV- , refer to the service manual OB319.

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 ············································7

7. REFRIGERANT SYSTEM DIAGRAM················8

8. SERVICE FUNCTIONS ······································9

9. TROUBLESHOOTING······································11

10. DISASSEMBLY INSTRUCTIONS·····················19

11. PARTS LIST······················································21

12. OPTIONAL PARTS···········································23

Indication of

model name

MCFH-A12WV-

MCFH-A18WV-

MCFH-A24WV- E1

OB336--1.qxp 04.1.6 11:12 AM Page 1

PART NAMES AND FUNCTIONS

TECHNICAL CHANGES

INDOOR UNIT

MCFH-A12WV -

MCFH-A18WV -

MCFH-A24WV - E1

(When installed on the floor)

(When the air inlet grille is opened.)

Deodorizing filter

(gray sponge type)(option)

Air filter

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

mounting hardware

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

Remote controller

MCFH-13NV- ➔MCFH-A12WV-

1. Rated voltage has changed. (220-240V ➔230V)

2. Indoor electronic control P.C. board has changed.

3. Horizontal vane has changed.

4. Terminal block has changed.

5. Indoor heat exchanger has changed.

6. Remote controller has changed.

Econo cool operation has been added.

7. Indoor fan motor has changed. (RB4V25-AB ➔RB4V25-AC)

E1E4 MCFH-18NV- ➔MCFH-A18WV-

1. Rated voltage has changed. (220-240V ➔230V)

2. Indoor electronic control P.C. board has changed.

3. Horizontal vane has changed.

4. Terminal block has changed.

5. Indoor heat exchanger has changed.

6. Remote controller has changed.

Econo cool operation has been added.

7. Gas of union has changed. ({15.88 ➔{12.7)

8. Indoor fan motor has changed. (RB4V36-AB ➔RB4V36-AC)

E1E3

MCFH-24NV- ➔MCFH-A24WV-

1. Rated voltage has changed. (220-240V ➔230V)

2. Indoor electronic control P.C. board has changed.

3. Horizontal vane has changed.

4. Terminal block has changed.

5. Indoor heat exchanger has changed.

6. Remote controller has changed.

Econo cool operation has been added.

7. Liquid of union has changed. ({9.52 ➔{6.35)

8. Indoor fan motor has changed. (RB4V36-AB ➔RB4V36-DB)

E1E3

OB336--1.qxp 04.1.6 11:13 AM Page 2

REMOTE CONTROLLER

MCFH-A12WV -

MCFH-A18WV -

MCFH-A24WV - E1

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

I FEEL

COOL

HEAT

DRY

CLOCK

RESET CLOCK

ON/OFF

TOO

COOL

TOO

WARM

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

ON-TIMER button

RESET button

ECONO COOL button

VANE CONTROL button

CLOCK SET button

HR. button

MIN. button

(TIME SET button)

Indication of remote controller model

is on back.

OB336--1.qxp 04.1.6 11:13 AM 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(at20:)

Dimensions WOHOD

Weight

Air direction

Sound level(High/Med.W/LowW)

Fan speed(High/Med.W/LowW)

Fan speed regulator

Thermistor RT11(at25:)

Thermistor RT12(at25:)

Remote controller model

K/h

A(kW)

rpm

Electrical

data

Fan

motor

Special

remarks

Capacity

MCFH-A12WV- E1 MCFH-A18WV- E1 MCFH-A24WV- E1

Cooling

—

Heating

—

780/636W/492W

0.30

0.066

0.30

RB4V25-AC

WHT-BLK 182.2 BLK-YLW 68.9

YLW-BLU 47.5 BLU-BRN 31.5

BRN-RED 22.9

46/41W/36W

1,240/1,060/845

KG04C

Cooling

—

Heating

—

Single phase

230V, 50Hz

840/696W/570W

0.36

0.080

0.36

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

48/44W/39W

1,320/1,145/960

KG04C

Cooling

—

Heating

—

840/744W/642W

0.36

0.080

0.36

RB4V36-DB

WHT-BLK 84.0 BLK-YLW 46.2

YLW-BLU 37.2 BLU-BRN 45.2

BRN-RED 13.6

48/45W/42W

1,320/1,190/1,060

KG04C

NOTE: Test conditions are based on ISO 5151

Cooling : Indoor DB27°C WB19°C Heating : Indoor DB20°C WB 15°C

Outdoor DB35°C WB(24°C) Outdoor DB 7°C WB 6°C

Indoor-Outdoor piping length : 5 m

wReference value

OB336--1.qxp 04.1.6 11:13 AM Page 4

NOISE CRITERIA CURVES

MCFH-A24WV - 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

Test conditions,

Cooling : DB 27: WB 19:\

Heating : DB 20: WB 15:

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

High

SPEED

SPL(dB(A)) LINE

MCFH-A12WV - 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

Test conditions,

Cooling : DB 27: WB 19:\

Heating : DB 20: WB 15:

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

High

SPEED

SPL(dB(A)) LINE

MCFH-A18WV - 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

Test conditions,

Cooling : DB 27: WB 19:\

Heating : DB 20: WB 15:

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

High

SPEED

SPL(dB(A)) LINE

INDOOR UNIT

WALL

1m 1m

MICROPHONE

OB336--1.qxp 04.1.6 11:13 AM Page 5

OUTLINES AND DIMENSIONS

(When installed on the floor)

(When installed on the ceiling)

50cm or more

100cm or more

650

616.5

80.8 906 112.8

114

1100

113

143

180

17042.5

12.7 (MCFH-A12/A18WV)

15.88 (MCFH-A24WV)

Gas line

6.35

Liquid line

Wireless remote controller

162

INDOOR UNIT

MCFH-A12WV -

MCFH-A18WV -

MCFH-A24WV - E1

E1 Unit: mm

OB336--1.qxp 04.1.6 11:13 AM Page 6

WIRING DIAGRAM6

INDOOR UNIT

TAB12

ELECTRONIC CONTROL P.C BOARD

SR142

SR143

X144

CN201

BRN

RECEIVER

P.C.BOARD

CONTROLLER

REMOTE

DISP/

12V

CONNECTING

TO OUTDOOR

UNIT

RT11

P.C.BOARD

SW/THERMO

113 151101

CN CN CN

C11

50Hz

SUPPLY

POWER

LDFH

LDFL

LDFM

LDC12

LDC11

LDCOM

BLK

BLU

YLW 6

ORN

RED

WHT 2

GRN/YLW

BLK MF

BLU

BRN

YLW

ORN

RED

WHT

112

CN 2RT12

BLU

RED

BLU

TB1 GRN/YLW

~/N 230V

BRN

SR141

LDFVL

TB2

CIRCUIT BREAKER

HIC1

F11

NR11

TRANS

MODELS WIRING DIAGRAM

SYMBOL

SR141~SR143

TB1, TB2

X144

SYMBOL

NR11

RT11

RT12

NAME NAME NAME

INDOOR FAN CAPACITOR

FUSE (3.15A)

DC/DC CONVERTER

INDOOR FAN MOTOR(INNER FUSE)

VANE MOTOR

VARISTOR

ROOM TEMPERATURE THERMISTOR

INDOOR COIL THERMISTOR

SOLID STATE RELAY

TERMINAL BLOCK

RELAY

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. : Connector

: Terminal block

NOTES:

SYMBOL

C11

F11

HIC1

MCFH-A12WV -

MCFH-A18WV -

MCFH-A24WV - E1

OB336--1.qxp 04.1.6 11:13 AM Page 7

REFRIGERANT SYSTEM DIAGRAM7

INDOOR UNIT

MCFH-A24WV- 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

MCFH-A12WV- 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

MCFH-A18WV- E1

Unit : mm

OB336--1.qxp 04.1.6 11:13 AM Page 8

SERVICE FUNCTIONS8

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 page 18.)

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.

MCFH-A12WV - MCFH-A18WV - MCFH-A24WV - E1E1E1

Remote controller model : KG04C

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.

OB336--1.qxp 04.1.6 11:13 AM Page 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 page 19.)

3Solder jumper wire to the JR07 on the indoor electronic

control P.C. board. (Refer to page 18.)

JR07

CN151CN113CN112

CN101

CN105

SW2

CN102

CN201

SW1

IC101

C11

TAB12

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.)

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

OB336--1.qxp 04.1.6 11:13 AM Page 10

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