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SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 4
4. OUTLINES AND DIMENSIONS ························ 6
5. WIRING DIAGRAM ············································ 8
6. REFRIGERANT SYSTEM DIAGRAM ··············· 9
7. SERVICE FUNCTIONS ··································· 10
8. TROUBLESHOOTING ······································11
9. DISASSEMBLY INSTRUCTIONS ···················· 25
10. PARTS LIST ····················································· 30
10-1. PARTS LIST ············································ 30
10-2. RoHS PARTS LIST ································· 36
11. MICROPROCESSOR CONTROL ···················· 42
Wireless type
Models
No. OB450
REVISED EDITION-C
MSZ-A09/12/15/17NA
MSY-A15/17NA
INDOOR UNIT
Outdoor unit service manual
MUZ-A·NA Series (OB451)
MXZ-A·NA Series (OB444)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the PARTS
LIST (RoHS compliant).
Revision C:
• SPECIFICATION has been corrected.
Please void OB450 REVISED EDITION-B.
MSZ-A09NA MSZ-A24NA
MSZ-A09NA -
1
MSZ-A24NA -
1
MSZ-A12NA MSY-A15NA
MSZ-A12NA -
1
MSY-A15NA -
1
MSZ-A15NA MSY-A17NA
MSZ-A15NA -
1
MSY-A17NA -
1
MSZ-A17NA MSY-A24NA
MSZ-A17NA -
1
MSY-A24NA -
1