Mitsubishi Electric MUH-09RV-E1 User Manual

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

Mitsubishi Electric MUH-09RV-E1 Specifications

General

Brand	Mitsubishi Electric
Model	MUH-09RV-E1
Category	Air Conditioner
Language	English

Summary

Technical Changes

Specifications

Indoor Model Specifications

Details electrical data, fan motor, and special remarks for indoor models.

Outdoor Model Specifications

Details capacity, electrical data, fan motor, and special remarks for outdoor models.

Outlines and Dimensions

Wiring Diagram

Indoor Unit Wiring Diagram

Illustrates the wiring connections for the indoor unit.

Outdoor Unit Wiring Diagram

Illustrates the wiring connections for the outdoor unit.

Refrigerant System Diagram

MSC/MU Series Refrigerant Diagram

MUH Series Refrigerant Diagram

Performance Curves

Capacity and Input Curves

Outdoor Low Pressure and Unit Current

Microprocessor Control

Wireless Remote Controller

Explains the functions and buttons of the wireless remote controller.

Service Functions

Troubleshooting

Cautions on Troubleshooting

Important safety and preliminary checks before troubleshooting.

Troubleshooting Procedure

Steps to follow when diagnosing operational abnormalities.

Troubleshooting Check Table (Indoor Unit)

Self Check Table

Table correlating abnormal indicators with symptoms, detection methods, and check points.

Troubleshooting Table (Outdoor Unit)

Troubleshooting Table

Table for diagnosing outdoor unit abnormalities based on display and detecting method.

Trouble Criterion of Main Parts

Room Thermistor Criteria

Indoor Fan Motor Criteria

Compressor Criteria

Simple Check Methods for Inverter/Compressor

Check of Open Phase

Procedure to check for open phase in the inverter by measuring AC voltage.

Check of Resistance (Transistor Module)

Check of Compressor Operation

Method to check compressor operation and detect overcurrent issues.

Check of Outdoor Thermistor

Check of Reversing Valve Coil

Check of Outdoor Fan Motor

Check of Hi/Low Pressure Switch and Compressor Thermostat Circuits

Check of Liner Expansion Valve (LEV)

Check of Mis-wiring or Mis-piping

Mis-wiring or Mis-piping Symptoms

Describes symptoms and checks for mis-wiring or mis-piping issues.

Test Point Diagram and Voltage

Indoor Electronic Control P.C. Board Test Points

Diagrams showing test points and voltages for indoor electronic control board.

Outdoor Unit Electronic Control P.C. Board Test Points

Diagrams showing test points and voltages for MXZ-18RV outdoor control board.

Disassembly Instructions

Indoor Unit Disassembly

Outdoor Unit Disassembly (MU Series)

Outdoor Unit Disassembly (MUH Series)

Parts List

Indoor Unit Structural Parts

Indoor Unit Electrical Parts

Outdoor Unit Structural Parts

Outdoor Unit Structural Parts (MU Series)

Outdoor Unit Structural Parts (MXZ-32RV)

Outdoor Unit Functional Parts and Electrical Parts (MU Series)

Outdoor Unit Functional Parts and Electrical Parts

Outdoor Unit Functional Parts and Electrical Parts (MXZ-18RV)

Outdoor Unit Functional Parts and Electrical Parts (MXZ-24RV)