Mitsubishi Electric MSZ-GE09NA-9 User Manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES
·······································
2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································5
4. OUTLINES AND DIMENSIONS ························ 7
5. WIRING DIAGRAM ············································ 9
6. REFRIGERANT SYSTEM DIAGRAM ············· 11
7. SERVICE FUNCTIONS ···································12
8. MICROPROCESSOR CONTROL ···················14
9. TROUBLESHOOTING ·····································21
10. DISASSEMBLY INSTRUCTIONS ···················· 40
No. OBH548
REVISED EDITION-D
SPLIT-TYPE AIR CONDITIONERS
INDOOR UNIT
Outdoor unit service manual
MUZ-GE•NA MUY-GE•NA
Series (OBH549)
MXZ-B·NA Series (OB444)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB548)
Revision D:
• MSZ-GE06/09/12/15/18NA-
9
and MSY-
GE09/12/15/18NA-
9
have been added.
Please void OBH548 REVISED EDITION-C
MSZ-GE06NA
MSZ-GE09NA
MSZ-GE12NA
MSZ-GE15NA
MSZ-GE18NA
MSZ-GE24NA
MSY-GE09NA
MSY-GE12NA
MSY-GE15NA
MSY-GE18NA
MSY-GE24NA
Models
MSZ-GE06/09/12/15/18NA
MSY-GE09/12/15/18NA
MSZ-GE06NA-
8
,
9
MSZ-GE09NA-
8
,
9
MSZ-GE12NA-
8
,
9
MSZ-GE15NA-
8
,
9
MSZ-GE18NA-
8
,
9
MSY-GE09NA-
8
,
9
MSY-GE12NA-
8
,
9
MSY-GE15NA-
8
,
9
MSY-GE18NA-
8
,
9

Mitsubishi Electric MSZ-GE09NA-9 Specifications

General

Cooling Capacity	9, 000 BTU/h
Heating Seasonal Performance Factor (HSPF)	10.0
Refrigerant	R410A
Operating Temperature (Cooling)	14°F to 115°F
Noise Level (Outdoor)	49 dB(A)

Summary

Technical Changes

Part Names and Functions

Specification

Operating Range

Wiring Diagram

Refrigerant System Diagram

Service Functions

Troubleshooting

Cautions on Troubleshooting

Important safety precautions and checks to perform before starting troubleshooting.

Troubleshooting Procedure

Step-by-step guide for identifying and diagnosing unit abnormalities.

Failure Mode Recall Function

Allows recalling and identifying past failure modes of the unit for diagnosis.

Indoor Unit Failure Mode Table

Table listing indoor unit failure modes, symptoms, conditions, and remedies based on indicator lamp flashes.

Instruction of Troubleshooting

Flowchart to guide the diagnosis of unit issues and identify potential causes.

Troubleshooting Check Table

A comprehensive table of abnormalities, symptoms, conditions, and remedies for accurate troubleshooting.

Trouble Criterion of Main Parts

Methods to test main components like thermistors, fan motors, and vane motors for faults.

Troubleshooting Flow: Indoor Fan Motor Check

Flowchart for diagnosing indoor fan motor errors and potential causes.

Check of Remote Controller and Indoor Electronic P.C. Board

Check of Indoor P.C. Board and Indoor Fan Motor

Detailed checks for indoor P.C. boards and the indoor fan motor to diagnose issues.

How to Check Miswiring and Serial Signal Error

Diagnostic steps to identify and resolve issues related to wiring errors and communication signals.

Test Point Diagram and Voltage