Mitsubishi Electric MSC-07RV User manual

SERVICE MANUAL
SPLIT-TYPE,AIR CONDITIONERS
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················6
3. REFRIGERANT SYSTEM DIAGRAM················8
4. PARTS LIST ·······················································9
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) · 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 -
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 -
E2
E2E2
E2E2
E2E2
E3E3
E3E3
E3E3
E2E2
E2E2
E2E2
E3E3
E3E3
E3E3
E2E2
E2E2
E2E2
No. OB252
REVISED EDITION-A
MSC-07RV -
MSC-09RV -
MSC-12RV - E2
E2
E2
NOTE: • This service Manual covers only change points.
Please refer to the Service Manual OB227 REVISED EDITION-
B for unchanged contents.
• Please refer to the following service manual when the outdoor
unit is the under mentioned model.
MXZ-32SV-E1: OB254
MXZ-18TV-E1: OB280
MUX-19/20/25TV-E1: OB284
• Please void OB252.
OB252A-1.qxp 01.4.4 2:20 PM Page 1

REVISION
This service Manual covers only change points.
(MSC-07/09/12RV- ➔MSC-07/09/12RV- )
(MU-07/09/12RV- ➔MU-07/09/12RV- )
(MUH-07/09/12RV- ➔MUH-07/09/12RV- )
(MUX-10/18/24RV- ➔MUX-10/18/24RV- )
(MXZ-18RV- ➔MXZ-18RV- )
(MSC-07/09/12RV- ➔MSC-07/09/12RV- )
(MU-07/09/12RV- ➔MU-07/09/12RV- )
(MUH-07/09/12RV- ➔MUH-07/09/12RV- )
E3E2
E3E2
E3E2
E2E1
E2E1
E2E1
E2E1
E2E1
OB252A-1.qxp 01.4.4 2:20 PM Page 2

3
TECHNICAL CHANGES
1
MUH-07RV -
MUH-09RV -
MUH-12RV -
MUX-10RV -
MUX-18RV -
MUX-24RV -
MXZ-18RV - E1
E1
E1
E1
E1
E1
E1 MUH-07RV -
MUH-09RV -
MUH-12RV -
MUX-10RV -
MUX-18RV -
MUX-24RV -
MXZ-18RV - E2
E2
E2
E2
E2
E2
E2
MSC-07RV -
MSC-09RV -
MSC-12RV - E1
E1
E1 MSC-07RV -
MSC-09RV -
MSC-12RV - E2
E2
E2
• Indoor electronic control P.C. board has changed.
• COOL ONLY / COOL & HEAT two-way remote controller is provided in the indoor unit accessory.
• Remote controller is unprovided in the outdoor unit accessory.
COOL ONLY REMOTE CONTROLLER Two-way REMOTE CONTROLLER
COOL&HEAT REMOTE CONTROLLER Two-way REMOTE CONTROLLER
•Both of COOL ONLY and COOL & HEAT remote controller are unified into a two-way remote controller.
• 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.
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
✕✕
✕
✕
w
wWhen HEAT mode is selected by
the remote controller of COOL & HEAT
type, the unit will operate in FAN mode.
Reference
MU-07RV -
MU-09RV -
MU-12RV - E1
E1
E1 MU-07RV -
MU-09RV -
MU-12RV - E2
E2
E2
• Contactor(52C) has changed.
• Remote controller is unprovided in the outdoor unit accessory.
OB252A-1.qxp 01.4.4 2:20 PM Page 3

4
MSC-07RV -
MSC-09RV - E2
E2 MSC-07RV -
MSC-09RV - E3
E3
• Indoor electronic control P.C. board has changed.
• Remote controller has changed.(COOL ONLY / COOL & HEAT two-way)
MSC-12RV - E2 MSC-12RV - E3
• Remote controller has changed.(COOL ONLY / COOL & HEAT two-way)
Remote controller
Amaximum 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
Slide switch Type
The position
of the slide
switch
COOL ONLYCOOL & HEAT
4-2. 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.
• The way of remodelling individual operation of P.C Board of remote controller changed.
OB252A-1.qxp 01.4.4 2:20 PM Page 4

5
MU-09RV - E2 MU-09RV - E3
MU-07RV - E2 MU-07RV - E3
• Compressor has changed. RH-135VGCT ➔RH-130VGCT
MU-12RV - E2 MU-12RV - E3
• Compressor has changed. RH-145VGCT ➔RH-140VGCT
• Refrigerant filling capacity (R22) has changed. 0.85kg ➔0.80kg
• Compressor has changed. RH-231VHAT ➔RH-220VHAT
MUH-07RV - E2 MUH-07RV - E3
• Compressor has changed. RH-135VGCT ➔RH-130VGCT
• Accumulator has been removed.
• Refrigerant filling capacity (R22) has changed. 0.80kg ➔0.85kg
MUH-09RV - E2 MUH-09RV - E3
• Compressor has changed. RH-174VGCT ➔RH-165VGCT
• Accumulator has been removed.
• Refrigerant filling capacity (R22) has changed. 0.80kg ➔0.85kg
MUH-12RV - E2 MUH-12RV - E3
• Compressor has changed. RH-231VHAT ➔RH-220VHAT
• Accumulator has been removed.
• How to replace batteries
Weak batteries may cause the remote controller malfunction.
In this case, the remote controller can be repaired only by the battery replacement. To operate the remote controller
normally, replace the batteries in the following order.
This remote controller has the RESET button. After refilling new batteries, press the RESET button with tip end of ball
point pen or the like, and then use the remote controller.
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 battereis is correct.
RESET button
1Remove the front lid and insert batteries.
Then reattach the front lid. 2Press the RESET button.
OB252A-1.qxp 01.4.4 2:20 PM Page 5

6
PART NAMES AND FUNCTIONS
2
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
ACCESSORIES
<Outdoor unit> <Outdoor unit: MUH type>
installation plate
Installation plate fixing screw 4 o25 mm
Remote controller mounting hardware
Fixing screw for 3.5 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
1
1
2
1
5
1
2
2
1
1
1
<Indoor unit>
installation plate
Installation plate fixing screw 4 o25 mm
Remote controller mounting hardware
Fixing screw for 3.5 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
1
2
1
5
1
2
2
1
1
1
1
<Indoor unit>
REMOTE CONTROLLER
MSC-07RV - • MU-07RV -
MSC-09RV - • MU-09RV -
MSC-12RV - • MU-12RV -
MSC-07RV - • MUH-07RV -
MSC-09RV - • MUH-09RV -
MSC-12RV - • MUH-12RV - E3E2E3E2
E3E2E3E2
E3E2E3E2
E3E2E3E2
E3E2E3E2
E3E2E3E2
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
E1E1
E1E1
E1E1
E1E1
OB252A-1.qxp 01.4.4 2:20 PM Page 6

7
MSC-07RV - MSC-09RV - MSC-12RV - E3E3E3
ON/OFF
TOO
COOL
PM
AM
TOO
WARM
ON/OFF
FAN
TOO
WARM TOO COOL
VANE
MODE
ECONO COOL
STOP
START
HR.
MIN.
I FEEL COOL
DRY
PM
CLOCK
AM
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
OB252A-1.qxp 01.4.4 2:20 PM Page 7

8
REFRIGERANT SYSTEM DIAGRAM
3
Unit:mm
MSC-12RV - E3 MUH-12RV - E3
INDOOR UNIT OUTDOOR UNIT
(with heat insulator)
(with heat insulator)
Refrigerant pipe [12.7 4-way valve
Muffler
Stop valve
(with service port)
Strainer
Refrigerant pipe [6.35
Stop valve
Capillary tube
[3.0x[1.6x700
Check
valve
Refrigerant flow in cooling
Refrigerant flow in heating
Defrost
thermistor
RT61 Outdoor
heat
exchanger
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT12
Capillary tube
[3.0x[1.8x300
Flared connection
Flared connection
Compressor
Indoor
heat
exchanger
R.V. coil
heating ON
cooling OFF
MSC-07RV -
MSC-09RV - E3
E3 MUH-07RV -
MUH-09RV - E3
E3
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Room temperature
thermistor
RT11
(with heat insulator)
Refrigerant pipe [9.52
Muffler
4-way valve
Defrost
thermistor
RT61
Strainer
Outdoor
heat
exchanger
Capillary tube
[3.0x[1.4x800 (2 pcs)
Capillary tube
[3.0x[1.6x600(MUH-07)
[3.0x[1.6x400(MUH-09)
Capillary tube
[3.0x[1.4x600(MUH-07)
[3.0x[1.4x550(MUH-09)
Check valve
Strainer
Refrigerant pipe [6.35
(with heat insulator) Refrigerant flow in cooling
Refrigerant flow in heating
Unit:mm
Stop valve
(with service
port)
Indoor coil
thermistor
RT12
R.V. coil
heating ON
cooling OFF
Capillary tube
[3.0x[1.4x500(2pcs)
Flared connection
Flared connection
Compressor
Stop valve
Strainer
OB252A-1.qxp 01.4.4 2:20 PM Page 8

9
1
2
3
4
5
6
7
8
9
10
11
E02 409 234
E02 411 234
E02 409 976
E02 424 000
E02 409 067
E02 424 010
E02 408 142
E02 408 100
E02 410 100
E02 409 975
E02 408 970
BOX(WH)
BOX(WH)
CORNER BOX (LEFT)
FRONT PANEL(WH)
SCREW CAP(WH)
GRILLE(WH)
CATCH
AIR FILTER
AIR FILTER
DEODORIZING FILTER
AIR CLEANING FILTER
CORNER BOX (RIGHT)
INSTALLATION PLATE
Symbol
in Wiring
Diagram
Q'ty/unit
1
1
1
2
1
3
2
1
1
1
1
1
1
1
2
1
3
2
1
1
1
1
1
1
1
2
1
3
2
1
1
1
1
Including No.4,5,6
2PCS/SET
3PCS/SET
MAC-1800DF
MAC-1300FT
Remarks
Part No.
No.
Part Name MSC-07RV
1
1
1
2
1
3
2
1
1
1
1
1
1
1
2
1
3
2
1
1
1
1
1
1
1
2
1
3
2
1
1
1
1
1
1
1
2
1
3
2
1
1
1
1
1
1
1
2
1
3
2
1
1
1
1
-
(WH)
E1 -
(WH)
E2
1
1
1
2
1
3
2
1
1
1
1
1 1
11
1
1 1
11
1
1 1
11
1
-
(WH)
E3 MSC-09RV
-
(WH)
E1 -
(WH)
E2 -
(WH)
E3 MSC-12RV
-
(WH)
E1 -
(WH)
E2 -
(WH)
E3
E02 504 426
E02 527 083
E02 141 083
E02 583 426
12
13
REMOTE CONTROLLER HOLDER
REMOTE CONTROLLER HOLDER
REMOTE CONTROLLER
REMOTE CONTROLLER
9 (W2)
1 (W1)
10
3
2
5
MSC-07RV - (WH) MSC-07RV - (WH) MSC-07RV - (WH)
MSC-09RV - (WH) MSC-09RV - (WH) MSC-09RV - (WH)
MSC-12RV - (WH) MSC-12RV - (WH) MSC-12RV - (WH)
E3E2E1
E3E2E1
E3E2E1
4
11
4-2. ACCESSORY PART
4-1. INDOOR UNIT STRUCTURAL PARTS
4-1.INDOOR UNIT STRUCTURAL PARTS
67 (W1)
12
4-2. ACCESSORY PART
4 PARTS LIST
(W1) These figures show about MSC-12RV.
13
8 (W2)
E3E2
(W2) Refer to OB227 REVISED EDITION-B 16. OPTIONAL PARTS (see page 184 ).
OB252A-1.qxp 01.4.4 2:20 PM Page 9

10
Part No.
No. Part Name
E02 001 504
E02 408 702
E02 409 235
E02 409 040
E02 409 041
E02 127 382
E02 336 385
E02 408 034
E02 424 395
E02 424 452
E02 504 452
E02 583 452
E02 425 452
E02 505 452
E02 584 452
E02 426 452
E02 506 452
E02 408 303
E02 408 308
E02 151 300
E02 424 375
E02 151 505
E02 408 307
E02 408 302
E02 408 509
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SLEEVE BEARING
DRAIN HOSE
NOZZLE (WH)
VANE UPPER (WH)
VANE LOWER (WH)
FUSE
VARISTOR
VANE MOTOR SUPPORT SET
POWER SUPPLY CORD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
ELECTRONIC CONTROL P.C.BOARD
VANE MOTOR
ROOM TEMPERATURE THERMISTOR
INDOOR FAN MOTOR
TERMINAL BLOCK
FAN MOTOR RUBBER MOUNT
INDOOR COIL THERMISTOR
LINE FLOW FAN
BEARING MOUNT
3.15A
AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART
AUTO RESTART
RC4V19-
2PCS/SET
F11
NR11
MV
RT11
MF
TB
RT12
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
Symbol
in Wiring
Diagram
Q'ty/unit
Remarks
MSC-07RV
-
(WH)
E1 -
(WH)
E2 -
(WH)
E3 MSC-09RV
-
(WH)
E1 -
(WH)
E2 -
(WH)
E3 MSC-12RV
-
(WH)
E1 -
(WH)
E2 -
(WH)
E3
4-3. INDOOR UNIT ELECTRICAL PARTS 19 (W)
20
21
E02 408 620
E02 410 620
E02 515 620
E02 151 666
E02 155 666
E02 151 667
19
20
21
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
UNION(GAS)
UNION(GAS)
UNION(LIQUID)
1
1
1

{9.52
{12.7
{6.35
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
10
12
4
2
5
11
15
3
17
13
18 16
14
9
68
7
4-4. INDOOR UNIT HEAT EXCHANGER
4-3. INDOOR UNIT ELECTRICAL PARTS
4-4. INDOOR UNIT HEAT EXCHANGER
MSC-07RV - (WH) MSC-07RV - (WH) MSC-07RV - (WH)
MSC-09RV - (WH) MSC-09RV - (WH) MSC-09RV - (WH)
MSC-12RV - (WH) MSC-12RV - (WH) MSC-12RV - (WH)
E3E2E1
E3E2E1
E3E2E1
SLEEVE
BEARING
ROOM TEMPERATURE
THERMISTOR
FUSE VARISTOR
1
(W)These figures show about MSC-12RV.
OB252A-1.qxp 01.4.4 2:20 PM Page 10