Mitsubishi Electric MU-A12WA User Manual

SERVICE MANUAL
Wireless type
Models
MU-A09WA
MU-A12WA
MU-A12WA-
1
SPLIT-TYPE AIR CONDITIONERS
OUTDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS ·························8
5. WIRING DIAGRAM ············································9
6. REFRIGERANT SYSTEM DIAGRAM··············10
7. DATA·································································12
8. TROUBLESHOOTING······································16
9. DISASSEMBLY INSTRUCTIONS ····················17
10. PARTS LIST······················································22
10-1. PARTS LIST·············································22
10-2. RoHS PARTS LIST··································24
NOTE:
This service manual describes technical data of the outdoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS PARTS
LIST (RoHS compliant).
Indoor unit service manual
MS-A•WA Series (OB448)
MU-A12WA
MU-A09WA
TM
HFC
utilized
R410A
No. OB449
REVISED EDITION-A
Revision : A
● MU-A12WA-
has been added.
1
Please void OB449.
OB449A.qxp 06.5.9 11:13 AM Page 1

Mitsubishi Electric MU-A12WA Specifications

General

Cooling Capacity	3.5 kW
Heating Capacity	4.0 kW
Power Supply	220-240 V, 50 Hz
Indoor Unit Noise Level	21 dB(A)
Type	Air Conditioner
Cooling Capacity (BTU)	12000 BTU
Noise Level (Indoor)	21 dB(A)

Summary

Technical Changes

Wiring Diagram

MU-A09WA Wiring Diagram

Electrical circuit diagram for MU-A09WA.

MU-A12WA Wiring Diagram

Electrical circuit diagram for MU-A12WA.

Refrigerant System Diagram

MU-A09WA Refrigerant System Diagram

Refrigerant flow and components for MU-A09WA.

MU-A12WA Refrigerant System Diagram

Troubleshooting

Troubleshooting Cautions

Safety precautions and general checks before troubleshooting.

Troubleshooting Instructions

Guidance for unit non-operation issues.

Trouble Criterion of Main Parts

Check methods and criteria for compressor and fan motor.

Disassembly Instructions

MU-A09WA Disassembly Instructions

MU-A12WA Disassembly Instructions

Parts List

MU-A09WA Parts List (Non-RoHS)

MU-A12WA Parts List (Non-RoHS)

MU-A09WA Parts List (RoHS)

MU-A12WA Parts List (RoHS)