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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
MSZ-A09NA MSZ-A24NA
MSZ-A09NA - MSZ-A24NA -
MSZ-A12NA MSY-A15NA
MSZ-A12NA - MSY-A15NA -
MSZ-A15NA MSY-A17NA
MSZ-A15NA - MSY-A17NA -
MSZ-A17NA MSY-A24NA
MSZ-A17NA - MSY-A24NA -
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No. OB450
REVISED EDITION-B
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MSZ-A09NA MSY-A15NA
MSZ-A12NA MSY-A17NA
MSZ-A15NA
MSZ-A17NA
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 B:
• MSZ-A•NA- and MSY-A•NA- have been
added.
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Please void OB450 REVISED EDITION-A.
OB450B-1.qxp 07.5.14 4:13 PM Page 1