SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················2
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES·······························8
5. OUTLINES AND DIMENSIONS ······················ 10
6. WIRING DIAGRAM ··········································13
7. REFRIGERANT SYSTEM DIAGRAM··············17
8. PERFORMANCE CURVES······························20
9. MICROPROCESSOR CONTROL ····················36
10. SERVICE FUNCTIONS·····································50
11. TROUBLESHOOTING······································52
12. DISASSEMBLY INSTRUCTIONS·····················71
13. PARTS LIST······················································79
14. OPTIONAL PARTS···········································88
Wireless type
Models
MSH-18RV -
(
WH
)
· MUH-18RV -
· MUH-18RV -
MSH-24RV -
(
WH
)
· MUH-24RV -
MSH-30RV -
(
WH
)
· MUH-30RV -
E1E1
E1E1
E2
E1E1
No. OB272
REVISED EDITION-A
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
MSH-18RV -
MSH-24RV -
E1
E1
Revision:
● MUH-18RV- has been added.
MUH-18RV- ➔ MUH-18RV-
•Path of outdoor heat exchanger has changed.
E2E1
E2
•Refer to the Service Manual OB185 REVISED EDITION C when MSH-18RV- is connected
with MXZ-32NV- or MXZ-32NV- as multi system units.
•Refer to the Service Manual OB227 REVISED EDITION-B when MSH-18RV- is connected
with MXZ-32RV- as multi system units.
•Refer to the Service Manual OB254 when MSH-18RV- is connected with MXZ-32SV- as
multi system units.
E1E1
E1
E1
E2E1
E1
OB272-1.qxp 02.1.26 1:22 PM Page 1
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