SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES ·······························6
5. OUTLINES AND DIMENSIONS ·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM ················8
8. MICROPROCESSOR CONTROL ······················9
9. SERVICE FUNCTIONS ····································17
10. TROUBLESHOOTING······································19
11. DISASSEMBLY INSTRUCTIONS ·····················26
12. PARTS LIST······················································28
Wireless type
Models
MSC-A07YV -
(WH)
MSC-A09YV -
(WH)
MSC-A12YV -
(WH)
E1
E1
E1
MSC-A07YV -
MSC-A09YV -
MSC-A12YV -
E1
E1
E1
No. OB329
HFC
utilized
R410A
SPLIT-TYPE, AIR CONDITIONERS
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Indication of model name
NOTE:
•This manual describes technical data of indoor units.
•As for outdoor units MU-A07/A09/A12YV -
, refer to the service manual OB330.
•As for outdoor units MUH-A07/A09/A12YV -
, refer to the service manual OB331.
•As for outdoor units MUX-A10/A19/A20/A25/A26WV -
, refer to the service manual OB307 REVISED
EDITION-A.
•As for outdoor units MUX-A22WV -
, refer to the service manual OB318.
•As for outdoor units MXZ-A18/A26/A32WV -
, refer to the service manual OB319.
E1
E1
E1
E1
E1
OB329-1.qxp 03.12.3 1:16 PM Page 1
