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Mitsubishi Electric MUX-10RV User Manual

Mitsubishi Electric MUX-10RV
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SERVICE MANUAL
SPLIT-TYPE,AIR CONDITIONERS
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················4
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························7
4. INDOOR UNITS COMBINATION ·······················8
5. SPECIFICATION···············································13
6. NOISE CRITERIA CURVES···························· 19
7. OUTLINES AND DIMENSIONS ······················ 22
8. WIRING DIAGRAM ··········································28
9. REFRIGERANT SYSTEM DIAGRAM··············35
10. PERFORMANCE CURVES······························46
11. MICROPROCESSOR CONTROL···················102
12. SERVICE FUNCTIONS···································120
13. TROUBLESHOOTING····································122
14. DISASSEMBLY INSTRUCTIONS···················148
15. PARTS LIST····················································166
16. OPTIONAL PARTS·········································184
Wireless type
Models
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 -
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 -
· MXZ-32RV -
E1
E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
No. OB227
REVISED EDITION-B
MSC-07RV -
MSC-09RV -
MSC-12RV -
E1
E1
E1
Revision:
MUX-10/18/24RV - has been added.
MXZ-18/32RV - has been added.
Noise criteria curves has been added.
Performance data has been added.
Specification has been partially modified.
Refrigerant system diagram has been partially
modified.
• Please void OB227 REVISED EDITION-A
E1
E1
NOTE: (Only MXZ-32RV - )
This manual describes technical data of MSC
type indoor unit .
For other indoor unit refer to the service manuals
No. OB229 REVISED EDITION-A of correspond-
ing models.
E1

Table of Contents

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Mitsubishi Electric MUX-10RV Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMUX-10RV
CategoryAir Conditioner
LanguageEnglish

Summary

1 TECHNICAL CHANGES

2 PART NAMES AND FUNCTIONS

INDOOR UNIT

Details the components and labels of the indoor unit section, including diagrams.

OUTDOOR UNIT

Details the components and labels of the outdoor unit section, including diagrams.

3 INDOOR / OUTDOOR CORRESPONDENCE TABLE

4 INDOOR UNITS COMBINATION

5 SPECIFICATION

Indoor model

Provides detailed specifications for indoor units across different models and functions.

Outdoor model

Provides detailed specifications for outdoor units across different models and functions.

Coefficient of performance(C.O.P)

Lists the Coefficient of Performance (C.O.P.) values for various indoor/outdoor unit combinations.

6 NOISE CRITERIA CURVES

MSC-07/09RV

Presents noise criteria curves for MSC-07/09RV indoor units under cooling and heating conditions.

MSC-12RV

Presents noise criteria curves for MSC-12RV indoor units under cooling and heating conditions.

MU-07/09RV

Presents noise criteria curves for MU-07/09RV indoor units under cooling and heating conditions.

MU-12RV

Presents noise criteria curves for MU-12RV indoor units under cooling and heating conditions.

7 OUTLINES AND DIMENSIONS

INDOOR UNIT (MSC-07RV, MSC-09RV)

Provides outline drawings and dimensions for MSC-07RV and MSC-09RV indoor units.

INDOOR UNIT (MSC-12RV)

Provides outline drawings and dimensions for the MSC-12RV indoor unit.

OUTDOOR UNIT (MU models)

Provides outline drawings and dimensions for MU/MUH series outdoor units.

OUTDOOR UNIT (MUX models)

Provides outline drawings and dimensions for MUX-10RV and MUX-18RV outdoor units.

8 WIRING DIAGRAM

INDOOR UNIT

Shows the wiring diagram for the indoor unit, including components and connections.

OUTDOOR UNIT (MU models)

Shows the wiring diagram for MU/MUH series outdoor units, including components and connections.

OUTDOOR UNIT (MUX-10RV)

Shows the wiring diagram for the MUX-10RV outdoor unit, including components and connections.

OUTDOOR UNIT (MUX-18RV)

Shows the wiring diagram for the MUX-18RV outdoor unit, including components and connections.

9 REFRIGERANT SYSTEM DIAGRAM

MSC/MU models

Illustrates the refrigerant circuit for MSC and MU series indoor/outdoor units.

MSC/MU models (cont.)

Continues refrigerant system diagrams for MSC and MU series, showing reversing valve function.

MAX. REFRIGERANT PIPING LENGTH

MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE(R-22 : g)

MSC/MUH & MSC/MU Models

Details additional refrigerant charge for MSC/MUH and MSC/MU series based on piping length.

10 PERFORMANCE CURVES

10-1-1.CAPACITY AND THE INPUT CURVES

Shows cooling capacity and input curves for MSC/MU models based on indoor/outdoor temperatures.

10-2-1.CAPACITY AND THE INPUT CURVES (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT)

Shows capacity and input curves for single indoor/outdoor unit combinations.

10-2-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Presents data on outdoor low pressure and current for MUX series units in COOL operation.

10-3-3.Outdoor low pressure and outdoor unit current

Provides data for MXZ-18RV in single operation for COOL and HEAT modes.

PERFORMANCE DATA

COOL operation (220V)

Provides performance data for MSC-07RV/MU-07RV models in COOL operation at 220V.

11 MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER

Explains the operation and display of the wireless remote controller.

INDOOR UNIT DISPLAY SECTION

Describes the operation indicator lamp on the indoor unit and its meaning.

11-1. COOL ( ) OPERATION

Details the COOL mode operation, including fan speed control and coil frost prevention.

11-2. DRY ( ) OPERATION

Explains the operation and control logic for the DRY mode.

11-4. HEAT ( ) OPERATION

2. High pressure protection

Describes the high pressure protection mechanism in HEAT operation for MUH/MXZ units.

3. Defrosting

Explains the defrosting control process for MUH/MXZ units based on thermistor readings.

4. Reversing valve control

Details the reversing valve control logic for MUH/MXZ units during different operations.

11-5. “I FEEL CONTROL” ( ) OPERATION

COOL mode of "I FEEL CONTROL"

Details the control logic for COOL mode within "I FEEL CONTROL", including fan speed and coil frost prevention.

11-6. FAN MOTOR CONTROL

11-7. AUTO VANE OPERATION

(1) Vane motor drive

Explains how the vane motor is driven by pulse signals from the microprocessor.

(7) Cold air prevention in HEAT operation

Explains cold air prevention logic in HEAT mode for MUH/MXZ units, adjusting vane angle.

(8) ECONO COOL ( ) operation

Details the ECONO COOL operation, including set temperature adjustment and fan speed gradation.

11-8. TIMER OPERATION

11-9. EMERGENCY-TEST OPERATION

2. Cancel

Explains how to cancel timer settings using the ON/OFF TIMER buttons.

11-10. INVERTER MULTI SYSTEM CONTROL

11-10.1. System organization (MXZ-18RV)

Provides a block diagram showing the system organization for MXZ-18RV inverter multi system.

INVERTER MULTI SYSTEM CONTROL (MXZ-32RV)

Illustrates the system organization for the MXZ-32RV inverter multi system.

11-10.2. LEV control

Explains the control of the Linear Expansion Valve (LEV) based on various parameters.

11-10.3. Control by the number of operating indoor unit

11-10.4. Selection of operation mode

11-10.5. Outdoor fan control

11-10.6. Operational frequency range

(1) COOLING

Lists compressor operational frequency ranges for cooling mode based on operating units.

11-10.7. Defrosting in heating

11-10.8. High and low pressure protection

(1) High pressure protection in heating

Details high pressure protection during heating operation for MXZ models.

11-10.9. Discharge temperature protection

11-10.10. Refrigerant recovery in heating

11-10.11. Sensors and actuators

12 SERVICE FUNCTIONS

12-1. COMPULSORY DEFROSTING MODE FOR SERVICE

Describes how to perform compulsory defrosting for service purposes on MUH models.

12-2. CHANGE IN DEFROST SETTING

Explains how to change defrost settings by modifying jumper wires on MUH models.

12-3. TIMER SHORT MODE

Details the procedure for shortening timer operation times by shorting specific points.

12-4. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

Explains how to modify P.C. boards for individual operation of multiple indoor units.

12-5. MU TYPE / MUH TYPE SWITCH OVER AND AUTO RESTART FUNCTION

2. AUTO RESTART FUNCTION

Explains how the auto restart function works after power restoration.

13 TROUBLESHOOTING

13-1. Cautions on troubleshooting

Provides important safety and preparation guidelines before starting troubleshooting.

13-2. Instruction of troubleshooting

Provides a troubleshooting flowchart for indoor unit related issues (except MXZ).

Instruction of troubleshooting (cont.)

Provides a troubleshooting flowchart for outdoor unit related issues and multi-system units.

13-3. troubleshooting check table <INDOOR UNIT>

Lists common indoor unit abnormalities, symptoms, detection methods, and check points.

troubleshooting check table <OUTDOOR UNIT> (Only MXZ-18/32RV)

(1) Troubleshooting table

Lists outdoor unit abnormalities, symptoms, detection methods, and check points for MXZ-18/32RV.

10-4. Trouble criterion of main parts

Room temperature thermistor

Provides criteria for checking the room temperature thermistor's resistance and voltage.

Compressor

Details the check method and criteria for the compressor's resistance and abnormalities.

Outdoor fan motor

Provides criteria for checking the outdoor fan motor's resistance and abnormalities.

Defrost thermistor

Provides check method and criteria for the defrost thermistor's resistance.

Compressor

Outdoor fan motor

Details resistance checks for outdoor fan motors in MUX series outdoor units.

Solenoid coil

Details resistance checks for solenoid coils in MUX series outdoor units.

Linear expansion valve

High pressure switch (HPS) / Low pressure switch (LPS)

Explains how to check high/low pressure switches and compressor thermostat for MXZ-32RV.

A Check of indoor fan motor

B Check of remote controller and receiver P.C. board

C Check of indoor electronic control P.C. board

D Check of outdoor unit

Compressor and / or outdoor fan does not operate

Troubleshooting flowchart for when the compressor or outdoor fan does not operate.

Compressor and / or outdoor fan does not operate.(Only indoor fan operates.)

Troubleshooting flowchart for when only the indoor fan operates.

Compressor and fan do not operate.(Only indoor fan operates.)

Troubleshooting flowchart for when neither compressor nor fan operates, only indoor fan.

E How to check mis-wiring and serial signal error (when outdoor unit does not work)

F Simple check methods for inverter/ compressor

G Check of open phase

Describes how to check for open phase issues in MXZ-18/32RV inverter systems.

H Check of resistance (transistor module)

Details resistance checks for the transistor module in MXZ-18/32RV systems.

I Check of compressor

J Check of compressor winding

Details how to check compressor winding resistance for MXZ-18/32RV.

K Check of compressor operation

Explains how to check compressor operation and detect overcurrent issues in MXZ-18/32RV.

L Check of outdoor thermistor

M Check of reversing valve coil

N Check of outdoor fan motor

O Check of solenoid coil

P Check of power supply

Q Check of rush current control circuit

R Check of hi/ low pressure switch and compressor thermostat circuits

S Check of liner expansion valve (LEV)

T Check of mis-wiring or mis-piping

T Check of mis-wiring or mis-piping (cont.)

Provides a troubleshooting flowchart for mis-wiring and serial signal errors in MXZ-32RV.

U The other cases

TEST POINT DIAGRAM AND VOLTAGE

Indoor electronic control P.C. board

Shows test points and voltage readings for the indoor electronic control P.C. board.

Outdoor deicer P.C. board

Shows test points and voltage readings for the outdoor deicer P.C. board.

MXZ-18RV Outdoor unit electronic control P.C. board

Illustrates test points and voltage readings for the MXZ-18RV outdoor electronic control P.C. board.

MXZ-18RV Relay P.C. board

Shows the layout and test points for the MXZ-18RV relay P.C. board.

MXZ-32RV Electronic control P.C.board

Noise filter P.C.board

Shows the layout of the noise filter P.C. board.

I.P.M. P.C.board

Shows the layout of the I.P.M. P.C. board.

Relay P.C.board

Shows the layout of the relay P.C. board.

14 DISASSEMBLY INSTRUCTIONS

1. Removing the front panel

Provides step-by-step instructions and photos for removing the front panel of the indoor unit.

2. Removing the electronic control P.C. board and the display P.C. board

Details the procedure for removing the electronic control and display P.C. boards from the indoor unit.

3. Removing the electrical box

Provides instructions and photos for removing the electrical box from the indoor unit.

4. Removing the vane motor

Details the procedure for removing the vane motor from the indoor unit.

1. Removing the cabinet

2. Removing the electrical parts

Details the process of removing electrical components like capacitors and terminal blocks from MU outdoor units.

3. Removing the propeller fan and the outdoor fan motor

4. Removing the compressor

Provides detailed steps and notes for removing the compressor from MU series outdoor units.

1. Removing the cabinet

2. Removing the deicer P.C. board

Details the procedure for removing the deicer P.C. board from MUH series outdoor units.

3. Removing the propeller fan and the outdoor fan motor

4. Removing the compressor

Provides detailed steps for removing the compressor from MUH series outdoor units.

1. Removing the cabinet.

2. Removing the propeller.

Details the procedure for removing the propeller from the MUX-10RV outdoor unit.

3. Removing the outdoor fan motor.

Explains how to remove the outdoor fan motor from the MUX-10RV outdoor unit.

4. Removing the compressor.

1.Removing the cabinet.

2. Removing the propeller.

Details the procedure for removing the propeller from the MUX-18RV outdoor unit.

3.Removing the outdoor fan motor.

Explains how to remove the outdoor fan motor from the MUX-18RV outdoor unit.

4. Removing the compressor.

5. Removing the compressor.

Provides an alternative procedure for removing the compressor from the MUX-18RV outdoor unit.

1.Removing the cabinet.

2. Removing the relay panel.

3. Removing the propeller.

Details the procedure for removing the propeller from the MUX-24RV outdoor unit.

4. Removing the outdoor fan motor.

Explains how to remove the outdoor fan motor from the MUX-24RV outdoor unit.

5. Removing the compressor. (A,B)

6. Removing the compressor. (C,D)

Provides steps for removing the compressor (C,D) from MUX-24RV outdoor unit.

Removing the compressor

Removing the outdoor fan motor

1.Removing the compressor

3.Removing the 4-way valve

4.Removing the linear expansion valve

Explains how to remove the linear expansion valve from the MXZ-32RV outdoor unit.

5.Removing the reactor

15 PARTS LIST

15-1. INDOOR UNIT STRUCTURAL PARTS

Lists structural parts of the indoor unit with part numbers and Q'ty.

15-1. INDOOR UNIT STRUCTURAL PARTS (cont.)

Lists structural parts of the indoor unit with part numbers and Q'ty.

15-3. INDOOR UNIT ELECTRICAL PARTS

Lists electrical parts for the indoor unit with part numbers and Q'ty.

15-4. INDOOR UNIT HEAT EXCHANGER

Lists heat exchanger parts for indoor units with part numbers and Q'ty.

15-5. OUTDOOR UNIT STRUCTURAL PARTS (MU models)

15-6. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS (MUH models)

15-7. REMOTE CONTROLLER

Lists the remote controller part with part number and Q'ty.

15-5. OUTDOOR UNIT STRUCTURAL PARTS (MUH models)

15-9. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS (MUH models)

15-10. REMOTE CONTROLLER

Lists the remote controller part with part number and Q'ty.

15-11. ACCESSORY PARTS

Lists accessory parts like drain socket and cap with part numbers and Q'ty.

15-12. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS (MUX-10RV)

15-13. REMOTE CONTROLLER

Lists the remote controller part with part number and Q'ty.

15-14. OUTDOOR UNIT STRUCTURAL PARTS (MUX-10RV)

15-15. OUTDOOR UNIT FUNCTIONAL PARTS AND AND ELECTRICAL PARTS AND STRUCTURAL PARTS (MUX-18RV)

15-16. REMOTE CONTROLLER

Lists the remote controller part with part number and Q'ty.

15-15. OUTDOOR UNIT FUNCTIONAL PARTS AND AND ELECTRICAL PARTS AND STRUCTURAL PARTS (MUX-18RV cont.)

15-16. REMOTE CONTROLLER

Lists the remote controller part with part number and Q'ty.

15-17. OUTDOOR UNIT FUNCTIONAL PARTS AND AND ELECTRICAL PARTS (MUX-24RV)

15-18. REMOTE CONTROLLER

Lists the remote controller part with part number and Q'ty.

15-20. OUTDOOR UNIT STRUCTURAL PARTS (MXZ-18RV)

15-21. OUTDOOR UNIT FUNCTURAL PARTS (MXZ-18RV)

15-22. OUTDOOR UNIT ELECTRICAL PARTS (MXZ-18RV)

15-23. OUTDOOR UNIT STRUCTURAL PARTS (MXZ-32RV)

15-24. OUTDOOR UNIT FUNCTIONAL PARTS (MXZ-32RV)

15-25. REMOTE CONTROLLER

15-26. ACCESSORY PARTS

16 OPTIONAL PARTS

16-1. AIR CLEANING FILTER

Describes the air cleaning filter, its function, life, and maintenance.

16-2. DEODORIZING FILTER

Describes the deodorizing filter, its function, cleaning, and replacement.

16-3. Different-diameter pipe

Provides specifications for different diameter pipes used for indoor/outdoor unit connections.

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