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Mitsubishi Electric MSC-12RV-E1 - User Manual

Mitsubishi Electric MSC-12RV-E1
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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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Summary

Technical Changes

Specifications

Wiring Diagram

Indoor Unit Wiring Diagram

Shows the wiring diagram for the indoor unit.

Refrigerant System Diagram

Max Refrigerant Piping Length & Height Difference

Additional Refrigerant Charge (R-22:g)

Details additional refrigerant charge requirements based on piping length.

Performance Curves

Outdoor Low Pressure and Unit Current (Cool Operation)

Shows outdoor low pressure and current data for COOL operation.

Inverter Frequency Correction (MXZ-18 RV)

Illustrates capacity/input correction by inverter frequency for MXZ-18RV.

Performance Data Cool Operation (220 V)

Microprocessor Control

Cool Operation

Heat Operation

Defrosting

I FEEL CONTROL Operation

Dry Mode I FEEL CONTROL

Details fan speed and compressor/fan operation in DRY mode.

Heat Mode I FEEL CONTROL

Details fan speed, high pressure, defrosting, and reversing valve control in HEAT mode.

Timer Operation

How to Set the Timer

Details the procedure for setting ON/OFF timers.

Emergency-Test Operation

Inverter Multi System Control

System Organization

Shows the overall system structure for inverter multi systems.

LEV Control

Operational Frequency Range

Defrosting in Heating

High and Low Pressure Protection

Discharge Temperature Protection

Service Functions

Compulsory Defrosting Mode for Service

Explains compulsory defrosting mode for service purposes.

MU Type; MUH Type Switch Over and Auto Restart Function

Auto Restart Function

Details the auto restart function and its settings.

Troubleshooting

Troubleshooting Precautions

Lists initial checks before starting troubleshooting.

Servicing Precautions

Outlines safety precautions during servicing.

Troubleshooting Procedure Steps

Provides steps for troubleshooting abnormalities.

Instruction of Troubleshooting (MU Models)

Troubleshooting Other Cases (MXZ Models)

Troubleshooting Check Table (Indoor Unit)

Troubleshooting Table (Outdoor Unit)

Indoor Fan Motor Check

Remote Controller and Receiver PC Board Check

Indoor Electronic Control PC Board Check

Outdoor Unit Check

Check Mis-wiring and Serial Signal Error (Outdoor Unit Failure)

Simple Inverter;Compressor Checks

Check of Open Phase

Procedure to check for open phase in the transistor module.

Check of Resistance (Transistor Module)

Procedure to check resistance of the transistor module terminals.

Compressor Checks

Compressor Check

Troubleshooting steps for compressor issues.

Compressor Winding Check

Method to check compressor winding resistance.

Compressor Operation Check

Procedure to check compressor operation under overcurrent.

Outdoor Thermistor Check

Outdoor Fan Motor Check

Power Supply Check

Hi;Low Pressure Switch and Compressor Thermostat Circuits Check

Linear Expansion Valve (LEV) Check

Mis-wiring or Mis-piping Check

Test Point Diagram and Voltage

Indoor Electronic Control P.C. Board Test Points

Shows test points and voltages on the indoor electronic control P.C. board.

Disassembly Instructions

Indoor Unit Disassembly

Instructions for disassembling indoor units.

MU Outdoor Unit Disassembly

MU Outdoor Unit Disassembly Steps

Steps for removing cabinet and electrical parts.

MUH Outdoor Unit Disassembly

MUH Outdoor Unit Disassembly Steps

Disassembly instructions for MUH outdoor units.

MUX-10 RV Outdoor Unit Disassembly

MUX-10 RV Outdoor Unit Disassembly Steps

Steps for removing cabinet, propeller, and fan motor.

MUX-18 RV Outdoor Unit Disassembly

MUX-18 RV Outdoor Unit Disassembly Steps

Steps for removing cabinet, propeller, and fan motor.

MUX-24 RV Outdoor Unit Disassembly

MUX-24 RV Outdoor Unit Disassembly Steps

Steps for removing cabinet, propeller, and fan motor.

MXZ-18 RV Outdoor Unit Disassembly

MXZ-18 RV Outdoor Unit Disassembly Steps

Steps for removing compressor, inverter, fan, etc.

MXZ-32 RV Outdoor Unit Disassembly

Parts List

Mitsubishi Electric MSC-12RV-E1 Specifications

General IconGeneral
BrandMitsubishi Electric
ModelMSC-12RV-E1
CategoryAir Conditioner
LanguageEnglish

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