SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················5
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································7
7. REFRIGERANT SYSTEM DIAGRAM················8
8. PERFORMANCE CURVES································9
9. MICROPROCESSOR CONTROL ····················20
10. SERVICE FUNCTIONS·····································22
11. TROUBLESHOOTING······································22
12. DISASSEMBLY INSTRUCTIONS·····················29
13. PARTS LIST······················································32
Wireless type
Models
MUH-A07YV -
MUH-A09YV -
MUH-A12YV -
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No. OB331
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MUH-A07YV -
MUH-A09YV -
MUH-A12YV -
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Indication of
model name
NOTE:
•This manual describes technical data of outdoor units.
•As for indoor units MSC-A07/A09/A12YV - , refer to the service manual OB329.
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OB331-1.qxp 03.12.3 1:20 PM Page 1
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