SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR/OUTDOOR
CORRESPONDENCE TABLE ···························8
4. INDOOR UNITS COMBINATION ·······················9
5. SPECIFICATION···············································10
6. NOISE CRITERIA CURVES···························· 17
7. OUTLINES AND DIMENSIONS ······················ 20
8. WIRING DIAGRAM ··········································25
9. REFRIGERANT SYSTEM DIAGRAM··············32
10. PERFORMANCE CURVES······························45
11. MICROPROCESSOR CONTROL·····················84
12. SERVICE FUNCTIONS···································102
13. TROUBLESHOOTING····································104
14. DISASSEMBLY INSTRUCTIONS···················129
15. PARTS LIST····················································144
16. OPTIONAL PARTS·········································157
Wireless type
Models
MSC-A07WV -
(
WH
)
· MU-A07WV -
MSC-A09WV -
(
WH
)
· MU-A09WV -
MSC-A12WV -
(
WH
)
· MU-A12WV -
MSC-A07WV -
(
WH
)
· MUH-A07WV -
MSC-A09WV -
(
WH
)
· MUH-A09WV -
MSC-A12WV -
(
WH
)
· MUH-A12WV -
Multi system type
Models
MSC-A07WV -
(
WH
)
· MUX-A10WV -
MSC-A09WV -
(
WH
)
· MUX-A19WV -
MSC-A12WV -
(
WH
)
· MUX-A20WV -
· MUX-A25WV -
· MUX-A26WV -
Inverter-controlled multi system Model
· MXZ-A18WV -
E1
E1
E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
E1E1
MSC-A07WV -
MSC-A09WV -
MSC-A12WV -
E1
E1
E1
No. OB307
REVISED EDITION-A
SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Revision:
● MXZ-A18WV - have been added.
● MSC-A07/09/12WV - Part No.
.
have changed.
VARISTOR (NR11& NR12)
E02 336 385 ➔ E02 749 385
● Please void OB307.
E1
E1
Indication of
model name
Remote
controller
OB307A1.qxp 03.2.19 3:56 PM Page 1
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