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SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
MSC-07RV -
MSC-09RV -
MSC-12RV -
MSC-07RV -
MSC-09RV -
MSC-12RV -
MSC-07RV -
MSC-09RV -
MSC-12RV -
MSC-07RV -
MSC-09RV -
MSC-12RV -
MSC-07RV -
MSC-09RV -
MSC-12RV -
MSC-07RV -
MSC-09RV -
MSC-12RV -
MSC-07RV -
MSC-09RV -
MSC-12RV -
Multi system type
MSC-07RV -
MSC-09RV -
MSC-12RV -
Inverter controlled multi system type
Indication of model name
MSC-07RV -
MSC-07RV -
E4
MSC-09RV -
MSC-09RV -
E4
MSC-12RV -
MSC-12RV -
E4
Revision:
• MSC-07RV-
• This service manual covers only change points.
• Please refer to the below service manual as for following models.
• Please void OB252 REVISED EDITION-C.
· MU-07RV -
E2
( WH )
· MU-09RV -
E2
( WH )
· MU-12RV -
( WH )
E2
· MU-07RV -
E3
( WH )
· MU-09RV -
E3
( WH )
· MU-12RV -
E3
( WH )
· MU-07RV -
E4
( WH )
· MU-09RV -
E4
( WH )
· MU-12RV -
E4
( WH )
· MUH-07RV -
( WH )
E2
· MUH-09RV -
( WH )
E2
· MUH-12RV -
E2
( WH )
· MUH-07RV -
E3
( WH )
· MUH-09RV -
( WH )
E3
· MUH-12RV -
( WH )
E3
· MUH-07RV -
E4
( WH )
· MUH-09RV -
E4
( WH )
· MUH-12RV -
E4
( WH )
E5
( WH )
E5
( WH )
E5
( WH )
· MUX-10RV -
E2
( WH )
· MUX-18RV -
E2
( WH )
· MUX-24RV -
E2
( WH )
· MXZ-18RV -
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
E5
7. TROUBLESHOOTING······································16
E5
8. PARTS LIST ·····················································27
E5
, MSC-09RV-
E5
E5
added.
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.
MXZ-32SV-
: OB254
E1
MXZ-18TV-
: OB280
E1
MUX-19TV-
, MUX-20TV-
E1
E1
PUMY-P125YMA and others : OC272 and others, and OC296
R-CONVERTER UNIT
E2
E2
E2
E3
E3
E3
E4
E4
E4
E2
E2
E2
E3
E3
E3
E4
E4
E4
E2
E2
E2
E2
and MSC-12RV-
have been
E5
and MUX-25TV-
: OB284
E1
No. OB252
REVISED EDITION-D
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Summary of Contents for Mitsubishi Electric MSC-07RV-E2
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Page 1: Table Of Contents
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 SPLIT-TYPE, AIR CONDITIONERS and the connected outdoor unit of MU, MUH, MUX and MXZ SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS series. -
Page 3: Technical Changes
TECHNICAL CHANGES Circle shows the change point of the model. Change point MSC-07RV- MSC-09RV- MSC-12RV- 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. - Page 4 Circle shows that change points apply to the models. Change point MU-07RV- MU-09RV- MU-12RV- 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.
- Page 5 Circle shows that change points apply to the models. Change point MUH-07RV- MUH-09RV- MUH-12RV- 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.
- Page 6 Reference REMOTE CONTROLLER Model COOL TWO-WAY COOL ONLY TWO-WAY & HEAT DIP switch MS-07/09/12RV- w When HEAT mode is selected MSH-07/09/12RV- MS-07/09/12RV- by the remote controller of MSH-07/09/12RV- COOL & HEAT type, the unit MS-07/09/12RV- will operate in FAN mode. MSH-07/09/12RV- MS-07/09/12RV- MSH-07/09/12RV-...
- Page 7 • The way of remodelling individual operation of P.C Board of remote controller has changed. 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.
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Page 8: Part Names And Functions
• How to replace batteries Weak batteries may cause the remote controller malfunction. In this case, replace the batteries to operate the remote controller normally. 1 Remove the front lid and insert batteries. 2 Press the RESET button. Then reattach the front lid. Insert the negative pole of the batteries first. - Page 9 MSC-07RV - MSC-09RV - MSC-12RV - REMOTE CONTROLLER Signal transmitting section Operation display section CLOCK 6 00 1 1 00 OPERATE /STOP (ON /OFF)button ON/OFF COOL WARM OPERATION SELECT button TEMPERATURE buttons MODE I FEEL COOL DRY HEAT/FAN VANE FAN SPEED CONTROL button VANE CONTROL button ECONO COOL ECONO COOL button...
- Page 10 MSC-07RV - MSC-07RV - MSC-07RV - MSC-09RV - MSC-09RV - MSC-09RV - MSC-12RV - MSC-12RV - MSC-12RV - REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button ON/OFF WARM COOL TEMPERATURE buttons Open the front lid. CLOCK ON/OFF WARM COOL...
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Page 11: Specification
SPECIFICATION MSC-07RV - MSC-09RV - MSC-12RV - Indoor model MSC-07RV - MSC-09RV - MSC-12RV - Function Cooling Cooling Cooling Single phase Single phase Single phase Indoor unit power supply 220-240V,50Hz 220-240V,50Hz 220-240V,50Hz Capacity Air flow(High/Med. /Low ) K /h 474/384 /294 474/384 /294 588/468 /360 Power outlet... - Page 12 MSC-07RV - MSC-09RV - MSC-12RV - Indoor model MSC-07RV - MSC-09RV - MSC-12RV - Heating Function Cooling Heating Cooling Heating Cooling Single phase Single phase Single phase Indoor unit power supply 220-240V,50Hz 220-240V,50Hz 220-240V,50Hz Capacity K /h 642/516 /402 Air flow(High/Med. /Low ) 474/384 /294 504/414 /336 474/384 /294...
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Page 13: Wiring Diagram
WIRING DIAGRAM MSC-07RV - MSC-09RV - MSC-12RV - MODELS WIRING DIAGRAM INDOOR UNIT TO OUTDOOR UNIT TAB12 RT12 CONNECTING CN201 RT11 MUH OR MXZ TYPE NR11 CN202 TRANS MU OR MUX TYPE SR141 CN211 LD103 POWER ELECTRONIC CONTROL P.C. BOARD SUPPLY CORD ~/N 220-240V... - Page 14 MU-07RV - MU-09RV - MU-12RV - MODELS WIRING DIAGRAM OUTDOOR UNIT FROM INDOOR UNIT CONNECTING DSAR CIRCUIT BREAKER NO COM POWER SUPPLY 220-240V 50Hz GRN/YLW SYMBOL NAME SYMBOL NAME SYMBOL NAME COMPRESSOR(INNER PROTECTOR) COMPRESSOR CONTACTOR COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR(INNER FUSE) OUTDOOR FAN CAPACITOR TERMINAL BLOCK DSAR...
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Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM Unit:mm MUH-07RV - MUH-07RV - MSC-07RV - MSC-07RV - MSC-07RV - MUH-09RV - MUH-09RV - MSC-09RV - MSC-09RV - MSC-09RV - INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [ 9.52 4-way valve (with heat insulator) Muffler Indoor coil Defrost Indoor Stop valve... -
Page 16: Microprocessor Control
MICROPROCESSOR CONTROL MSC-07RV - MSC-07RV - MU-07RV - MUH-07RV - MSC-09RV - MSC-09RV - MU-09RV - MUH-09RV - MSC-12RV - MSC-12RV - MU-12RV - MUH-12RV - 11-1. COOL ( ) OPERATION 6-1. 1. Indoor fan speed control Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regard- less of thermostat’s OFF-ON. - Page 17 When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor doesn’t operate. Check of indoor fan motor Turn OFF the power supply. Check connector CN211 visually. Is soldered point of the connector Are lead wires connected? correctly soldered? Reconnect the lead wires. Resolder it.
- Page 18 The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually.
- Page 19 Compressor and / or outdoor fan motor doesn’t operate. Check of outdoor unit <MU-07/09/12RV> Start Is the switch SW2-2 on the Change the switch SW-2-2 indoor electronic control on the indoor electronic control P.C. board to MU type. P.C. board set to MU type? Operate the unit in COOL mode by pressing the EMERGENCY OPERATION switch.
- Page 20 Compressor and / or outdoor fan motor doesn’t operate. Check of outdoor unit <MUH-07/09/12RV> Start Is the switch SW2-2 on the Change the switch SW-2-2 on the indoor electronic control indoor electronic control P.C. board set to MUH type? P.C. board to MUH type. Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch.
- Page 21 Outdoor unit doesn’t work. How to check mis-wiring and serial signal error 1 Set the switch(SW2-2) on indoor electronic control P.C. board to MU or MUX type, when the outdoor unit is MU or MUX type. If the setting is MUH or MXZ type, the unit does not work. Start 2 Short circuit of JPG and JPS on the indoor electronic control P.C.
- Page 22 Compressor and / or outdoor fan motor doesn’t stop. Check of outdoor unit <MU-07/09/12RV> Start Turn OFF the power supply. After 1 minute, turn ON power supply again. Is there 220-240V AC between COM on Is there 12V DC between Does compressor or Replace the compressor the compressor contactor (52C) and N on...
- Page 23 When OPERATION INDICATOR lamp flashes 6-time. Thermistors in the outdoor unit are abnormal. Check of outdoor thermistor <MUH-07/09/12RV> Start Replace the deicer P.C. board. Defrost thermistor (RT61) Re-connect CN661. Measure Turn ON the power resistance Does the resistance Turn OFF the supply and press Does the unit operate between CN 661...
- Page 24 Unit operates HEAT mode even if it is set to COOL mode. w First, measure the resistance of R.V. coil to confirm it is disconnected or is not short-circuit. <MUH-07/09/12RV> Check of R.V. coil Turn ON the power supply and operate the indoor unit in COOL mode by pressing the EMERGENCY OPERATION switch.
- Page 25 TEST POINT DIAGRAM AND VOLTAGE MSC-07RV - MSC-07RV - MSC-09RV - MSC-09RV - MSC-12RV - MSC-12RV - Indoor electronic control P.C. board Power supply input 220-240V AC Fuse(F11) 250V AC 3.15A Fan motor power supply Varistor (NR11) CN111 Room temperature thermistor (RT11) CN112 CN201...
- Page 26 MUH-07RV - MUH-09RV - MUH-12RV - Outdoor deicer P.C. board CN721 CN711 Power supply input R.V. coil Outdoor fan motor 220-240V AC 220-240V AC 220-240V AC NR61 Varistor Fuse 2A/250V R601 5~10VDC Defrost interval time short pin (JPDS, JPSG) (Refer to page 5.) Jumper wire for change in defrost setting...
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Page 27: Parts List
PARTS LIST MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) - Page 28 MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) MSC-07RV - (WH) MSC-09RV - (WH) MSC-12RV - (WH) 8-4.
- Page 29 MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV - 8-5. OUTDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol MU-07RV-...
- Page 30 MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV - 8-7. REMOTE CONTROLLER 8-6. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS MU-07RV - MU-09RV - MU-12RV - MU-07RV - MU-09RV - MU-12RV -...
- Page 31 MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV - MUH-12RV - 8-8. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol MUH-07RV-...
- Page 32 MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV - MUH-12RV - 8-10. ACCESSORY AND 8-9. OUTDOOR UNIT REMOTE CONTROLLER ELECTRICAL PARTS AND FUNCTIONAL PARTS MUH-07RV - MUH-09RV - MUH-12RV - MUH-07RV - MUH-09RV -...
- Page 33 MUX-10RV - MUX-10RV - 8-11. OUTDOOR UNIT STRUCTURAL PARTS, 8-12. REMOTE CONTROLLER ELECTRICAL PARTS AND FUNCTIONAL PARTS When servicing, cut the tube to the proper length as shown in the REFRIGERANT SYSTEM DIAGRAM. 8-11. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration.
- Page 34 MUX-18RV - MUX-18RV - 8-13. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 24 23 22 6 21 29 28 8-14. REMOTE CONTROLLER...
- Page 35 MUX-18RV - MUX-18RV - 8-13. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty / unit Symbol in Wiring Part No. Part Name Remarks MUX-18RV- Diagram CABINET T2W 457 232 T2W 466 509 OUTER NOZZLE M21 K59 245...
- Page 36 MUX-24RV - MUX-24RV - 8-16. REMOTE CONTROLLER 8-15. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 8-15. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. Q'ty / unit Symbol in Wiring Part No.
- Page 37 MUX-24RV - MUX-24RV - 8-17. OUTDOOR UNIT STRUCTURAL PARTS 9 10 11 12 Part number that is circled is not shown in the illustration. Q'ty / unit Symbol in Wiring Part No. Part Name Remarks MUX-24RV- Diagram T2W E44 521 OUTER NOZZLE SERVICE PANEL T2W E44 245...
- Page 38 MXZ-18RV - MXZ-18RV - 8-18. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 11 12 Part numbers that are circled are not shown in the illustration. Q'ty / unit Symbol in Wiring Part No. Part Name Remarks MXZ-18RV- Diagram R01 A00 662 SIDE PANEL HANDLE T2W A70 009...
- Page 39 MXZ-18RV - MXZ-18RV - 8-20. ACCESSORY AND 8-19. OUTDOOR UNIT ELECTRICAL PARTS REMOTE CONTROLLER 8-19. OUTDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty / unit Symbol in Wiring Part No. Part Name Remarks MXZ-18RV- Diagram...
- Page 40 HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Apr. 2003. No.OB252 REVISED EDITION D 142 Reprinted in Mar. 2003. No.OB252 REVISED EDITION-C 10 Distributed in Mar. 2002. No.OB252 REVISED EDITION C 13 Distributed in Jan.
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