Mitsubishi Electric MSC-07RV-E2 Manuel utilisateur

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ····································3

2. PART NAMES AND FUNCTIONS······················8

3. SPECIFICATION···············································11

4. WIRING DIAGRAM ··········································13

5. REFRIGERANT SYSTEM DIAGRAM··············15

6. MICROPROCESSOR CONTROL ····················16

7. TROUBLESHOOTING······································16

8. PARTS LIST ·····················································27

Wireless type

Models

MSC-07RV - (WH) · MU-07RV -

MSC-09RV - (WH) · MU-09RV -

MSC-12RV - (WH) · MU-12RV -

MSC-07RV - (WH) · MU-07RV -

MSC-09RV - (WH) · MU-09RV -

MSC-12RV - (WH) · MU-12RV -

MSC-07RV - (WH) · MU-07RV -

MSC-09RV - (WH) · MU-09RV -

MSC-12RV - (WH) · MU-12RV -

MSC-07RV - (WH) · MUH-07RV -

MSC-09RV - (WH) · MUH-09RV -

MSC-12RV - (WH) · MUH-12RV -

MSC-07RV - (WH) · MUH-07RV -

MSC-09RV - (WH) · MUH-09RV -

MSC-12RV - (WH) · MUH-12RV -

MSC-07RV - (WH) · MUH-07RV -

MSC-09RV - (WH) · MUH-09RV -

MSC-12RV - (WH) · MUH-12RV -

MSC-07RV - (WH)

MSC-09RV - (WH)

MSC-12RV - (WH)

Multi system type

MSC-07RV - (WH) · MUX-10RV -

MSC-09RV - (WH) · MUX-18RV -

MSC-12RV - (WH) · MUX-24RV -

Inverter controlled multi system type

· MXZ-18RV -

E2E2

E4E4

E3E3

E2E2

E4E4

E3E3

E2E2

No. OB252

REVISED EDITION-D

SPLIT-TYPE, AIR CONDITIONERS

SPLIT-TYPE, HEAT PUMPAIR CONDITIONERS

MSC-07RV - MSC-07RV -

MSC-09RV - MSC-09RV -

MSC-12RV - MSC-12RV - E5E4

E5E4

Revision:

• MSC-07RV- , MSC-09RV- and MSC-12RV- have been

added.

• This service manual covers only change points.

Please refer to the service manual OB227 REVISED

EDITION-B for unchanged contents.

OB227 REVISED EDITION-B describes only for the indoor unit

and the connected outdoor unit of MU, MUH, MUX and MXZ

series.

• Please refer to the below service manual as for following models.

MXZ-32SV- : OB254

MXZ-18TV- : OB280

MUX-19TV- , MUX-20TV- and MUX-25TV- : OB284

PUMY-P125YMA and others : OC272 and others, and OC296

R-CONVERTER UNIT

• Please void OB252 REVISED EDITION-C.

E1E1E1

E5E5E5

Indication of model name

OB252D-1.qxp 03.4.22 11:00 AM Page 1

OB252D-1.qxp 03.4.21 9:16 AM Page 2

TECHNICAL CHANGES

The specifications of indoor and outdoor fan motor

The data of Med. and Low speed have been added to indoor

fan motor specification as reference.✼

✼The data value of indoor fan motor does not change even if

the indoor unit is connected to a multi-type or PUMY series

outdoor unit.

Remote controllers of COOL ONLY or COOL & HEAT

type are outdoor unit accessory.

Remote controller is included as an indoor unit accessory.

Two-way common remote controller

Two-way (using dip switch) remote controller

The specification of electronic control P.C. board is

compatible with remote controllers of COOL ONLY

and COOL & HEAT type.

Indoor electronic control P.C. board has changed

for two-way remote controller.

Indoor electronic control P.C. board has changed

for two-way remote controller.

Microprocessor programming flow has changed.

Indoor electronic control P.C. board for E3 is interchangeable

with the one for E2 except for MSC-12RV.

(New P.C. board) Indoor electronic control P.C. board has

changed.

Earth wire from the board is fixed to the electrical box with screw.

The shape of connector CN211 has changed. Indoor electronic

control P.C. board has been connected with

power monitor, receiver P.C. board using connector.

Indoor electronic control P.C. board has changed.

Microprocessor programming flow has changed to make the

communication between indoor unit and R-CONVERTER

possible.

Indoor unit gets to be connected to outdoor unit of PUMY

series (PUMY-P125YMA and others).

However, R-CONVERTER UNIT is necessary to connect

PUMY series.

Indoor electronic control P.C. board for E5 is interchangeable

with the one for E4.

The setting of fan speed control when fan speed is set to

"Auto" in COOL operation has been improved in order to

reach the set temperature faster than E1, E2, and E3.

The mark of terminal block has changed. Terminal block for E4

or E5 is interchangeable with the ones for E1, E2 and E3.

Winding resistance and shape of indoor fan motor have

changed. Indoor fan motor for E4 or E5 is not interchangeable

with the ones for E1, E2 and E3 except for MSC-12RV.

As for spare indoor fan motors for MSC-07/09RV-E1, E2, E3,

E4 and MSC-07/09RV-E5 are the same.

Fan motor rubber mount has changed from E3 because

the shape of fan motor was changed.

As for spare fan motor rubber mount sets for MSC-07/09/12RV-

E1, E2, E3, E4 and MSC-07/09/12RV-E5 are the same.

Circle shows the change point of the model.

Change point

No.

MSC-07RV-

E3 MSC-09RV-

E3 MSC-12RV-

E4 E4

E5 E5

OB252D-1.qxp 03.4.22 11:01 AM Page 3

Remote controller of COOL ONLY type is outdoor unit accessory.

Remote controller is included as an indoor unit accessory.

Compressor contactor (52C) has changed. Compressor

contactor for E2,E3,E4 are interchangeable with the ones for E1.

Compressor has changed. Compressors for E3 and E4 are not

interchangeable with the ones for E1 and E2.

Compressor capacitor has changed. Due to different shape,

compressor capacitor for E4 is not interchangeable with the

ones for E1, E2 and E3.

Fuse has been removed.

Wiring diagram has changed because fuse was removed.

The shape of propeller fan has changed. The number of

propeller fan has changed from four to three. Propeller fan for E4

is not interchangeable with the ones for E1, E2 and E3.

The shape, diameter of axis and fan speed of fan motor have

changed. Fan motor for E4 is not interchangeable with the ones

for E1, E2 and E3.

Fan motor capacitor has changed. 1.5+➔ 2.0+

Fan motor capacitor for E4 is not interchangeable with the

ones for E1, E2 and E3(MU-12RV only).

Refrigerant filing capacity has changed. 0.85kg➔ 0.80kg

The method of troubleshooting for outdoor unit has changed.

The repairing procedure when outdoor unit does not stop

has been added to troubleshooting.

Circle shows that change points apply to the models.

Change point

No.

MU-07RV-

E3 MU-09RV-

E3 MU-12RV-

OB252D-1.qxp 03.4.21 9:16 AM Page 4

Remote controller of COOL & HEAT type is outdoor unit

accessory.

Remote controller is included as an indoor unit accessory.

Accumulator has been removed.

Compressor has changed.

Compressor capacitor has changed. Due to different

shape, compressor capacitor for E4 is not interchangeable

with the ones for E1,E2 and E3.

The mark of terminal block has changed. Terminal block

for E4 is interchangeable with the ones for E1, E2 and E3.

Deicer P.C. board has changed. Jumper wire of compulsory

defrosting mode has changed.

(JP607-R853➔JPDS-JPSG)

Jumper wire for defrost setting has changed.

(JPC-JPE➔JRF-JRG) (Refer to page 26.)

The defrosting intervals which are changed by setting a short

circuit are the same as E1, E2, and E3.

Deicer P.C. board for E4 is not interchangeable with the

ones for E1, E2 and E3.

Wiring diagram has changed according to the following

reasons; the shape of connectors CN711 and CN661 has

changed and R.V. coil relay (X62) has changed into SSR (SR62).

X62 has changed into SR62 in Example of Operation

time chart in HEAT operation.

Compared to E1, E2, and E3, no change has been made about

the operational condition for defrosting and tne control system of

R.V. coil (timing of switching on/off).

The shape of propeller fan has changed. The number of

propeller fan has changed from four to three. Propeller

fan for E4 is not interchangeable with the ones for E1,E2, and E3.

The shape and diameter of axis of fan motor have changed.

The shape of connector has changed.

Fan motor and connector for E4 are not interchangeable

with those for E1, E2 and E3.

Refrigerant filling capacity has changed. 0.80kg➔ 0.85kg

The method of checking serial signal error for E4 has been added.

The method of troubleshooting for outdoor unit has changed.

The method for checking thermistor has been added to

troubleshooting.

The method for checking 4-way valve has been added to

troubleshooting.

The repairing procedure when outdoor unit does not stop has

been added to troubleshooting.

Circle shows that change points apply to the models.

Change point

No.

MUH-07RV-

E3 MUH-09RV-

E3 MUH-12RV-

MUX-10RV -

MUX-18RV -

MUX-24RV -

MXZ-18RV - E1

E1 MUX-10RV -

MUX-18RV -

MUX-24RV -

MXZ-18RV - E2

1. Remote controller is unprovided as the outdoor unit accessory.

OB252D-1.qxp 03.4.21 9:16 AM Page 5

COOL ONLY COOL

& HEAT TWO-WAY

REMOTE CONTROLLER

Model

MS-07/09/12RV- E1

MSH-07/09/12RV- E1

MS-07/09/12RV- E2

MSH-07/09/12RV- E2

✕✕

wWhen HEAT mode is selected

by the remote controller of

COOL & HEAT type, the unit

will operate in FAN mode.

TWO-WAY

DIP switch

MS-07/09/12RV- E3

MSH-07/09/12RV- E3

MS-07/09/12RV- E4

MSH-07/09/12RV- E4

MS-07/09/12RV- E5

MSH-07/09/12RV- E5

Reference

COOL ONLY REMOTE CONTROLLER TWO-WAY REMOTE CONTROLLER

COOL&HEAT REMOTE CONTROLLER TWO-WAY REMOTE CONTROLLER

1. Both of COOL ONLY and COOL & HEAT remote controller are unified into a two-way remote controller.

2. FAN mode operation is available in COOL ONLY unit. In this case the set room temperature

will be displayed on the remote controller, however, the room temperature can not be controlled by remote controller button.

HEAT operation is available in only HEAT & COOL type unit.

TWO-WAY REMOTE CONTROLLER TWO-WAY DIP SWITCH REMOTE CONTROLLER

• Outlines and dimensions have been changed.

162

Wireless remote controller

MSC-07RV -

MSC-09RV -

MSC-12RV -

MU-07RV -

MU-09RV -

MU-12RV -

MUH-07RV -

MUH-09RV -

MUH-12RV - E1

E1 MSC-07RV -

MSC-09RV -

MSC-12RV -

MU-07RV -

MU-09RV -

MU-12RV -

MUH-07RV -

MUH-09RV -

MUH-12RV - E2

MSC-07RV -

MSC-09RV -

MSC-12RV - E2

E2 MSC-07RV -

MSC-09RV -

MSC-12RV - E3

OB252D-1.qxp 03.4.21 9:16 AM Page 6

Slide switch Type

The position

of the slide

switch

COOL ONLYCOOL & HEAT

REMOTE CONTROLLER (How to set the type)

This remote controller setting needs to be switched according to the type of air conditioner (COOL & HEAT or COOL

ONLY).

If the setting is incorrect, the air conditioner does not operate normally. Therefore, check if the setting corresponds to

the type of air conditioner. If it does not, correct the setting as shown below.

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 :

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.

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.

Table 1

• The way of remodelling individual operation of P.C Board of remote controller has changed.

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

OB252D-1.qxp 03.4.21 9:16 AM Page 7

PART NAMES AND FUNCTIONS

ACCESSORIES

Installation plate

Installation plate fixing screw 4 o25 mm

Remote controller mounting hardware

Fixing screw for 33.5 o16 mm

Battery (AAA) for remote controller

Felt tape (Used for left or left-rear piping)

Deodorizing filter

Air cleaning filter

Wireless remote controller

Drain socket: MUH type

Drain cap: MUH type

Installation plate

Installation plate fixing screw 4 o25 mm

Remote controller mounting hardware

Fixing screw for 33.5 o16 mm

Battery (AAA) for remote controller

Wireless remote controller

Felt tape (Used for left or left-rear piping)

Deodorizing filter

Air cleaning filter

Drain socket

Drain cap

MSC-07RV - • MU-07RV -

MSC-09RV - • MU-09RV -

MSC-12RV - • MU-12RV -

MSC-07RV - • MUH-07RV -

MSC-09RV - • MUH-09RV -

MSC-12RV - • MUH-12RV -

MSC-07RV - • MU-07RV -

MSC-09RV - • MU-09RV -

MSC-12RV - • MU-12RV -

MSC-07RV - • MUH-07RV -

MSC-09RV - • MUH-09RV -

MSC-12RV - • MUH-12RV -

MSC-07RV - • MU-07RV -

MSC-09RV - • MU-09RV -

MSC-12RV - • MU-12RV -

MSC-07RV - • MUH-07RV -

MSC-09RV - • MUH-09RV -

MSC-12RV - • MUH-12RV -

MSC-07RV -

MSC-09RV -

MSC-12RV - E5

E4E4

E3E3

E2E2

MSC-07RV - • MU-07RV -

MSC-09RV - • MU-09RV -

MSC-12RV - • MU-12RV -

MSC-07RV - • MUH-07RV -

MSC-09RV - • MUH-09RV -

MSC-12RV - • MUH-12RV - E1E1

E1E1

• How to replace batteries

Weak batteries may cause the remote controller malfunction.

In this case, replace the batteries to operate the remote controller normally.

NOTE : If the RESET button is not pressed, the remote controller may not operate correctly.

Insert the negative pole

of the batteries first.

Check if the polarity of

the batteries are correct.

HEAT

/FAN

RESET button

HEAT

/FAN

1Remove the front lid and insert batteries.

Then reattach the front lid. 2Press the RESET button.

OB252D-1.qxp 03.4.21 9:16 AM Page 8

MSC-07RV - MSC-09RV - MSC-12RV - E2E2E2

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

OPERATION SELECT button

FAN SPEED CONTROL button

ON-TIMER button

CLOCK SET button

HR. button

MIN. button

(TIME SET button)

TEMPERATURE buttons

VANE CONTROL button

OFF-TIMER button

RESET button

ON/OFF TOO

WARM TOO

COOL

HR. MIN.

CLOCK

RESET

CLOCK

MODE

FAN VANE

START STOP

ECONO COOL button ECONO COOL

I FEEL COOL DRY

HEAT/FAN

600 1 100

AM PM

REMOTE CONTROLLER

OB252D-1.qxp 03.4.21 9:16 AM Page 9

MSC-07RV - MSC-07RV - MSC-07RV -

MSC-09RV - MSC-09RV - MSC-09RV -

MSC-12RV - MSC-12RV - MSC-12RV - E5E4E3

E5E4E3

ON/OFF

TOO

COOL

TOO

WARM

ON/OFF

FAN

TOO

WARM TOO

COOL

VANE

MODE

ECONO COOL

STOP

START

HR.

MIN.

I FEEL

COOL

DRY

CLOCK

RESET CLOCK

HEAT

/FAN

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

ECONO COOL button

VANE CONTROL button

CLOCK SET button

REMOTE CONTROLLER

OB252D-1.qxp 03.4.21 9:16 AM Page 10

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