SERVICE MANUAL
SPLIT-TYPE,HEATPUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGES····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································6
4. OUTLINES AND DIMENSIONS······················ 11
5. WIRING DIAGRAM ··········································15
6. REFRIGERANT SYSTEM DIAGRAM··············24
7. PERFORMANCE CURVES······························29
8. MICROPROCESSOR CONTROL····················33
9. SERVICE FUNCTIONS····································44
10. TROUBLESHOOTING······································47
11. DISASSEMBLYINSTRUCTIONS·····················60
12. PARTS LIST······················································70
13. OPTIONAL PARTS····································BACK

Wireless type

Models

MSH-07NV - (WH) · MUH-07NV -

MSH-09NV - (WH) · MUH-09NV -

MSH-12NV - (WH) · MUH-12NV -
MSH-18NV - (WH) · MUH-18NV -
MSH-24NV - (WH) · MUH-24NV -
MSH-07NV - (WH) · MUH-07NV -

MSH-09NV - (WH) · MUH-09NV -

MSH-12NV - (WH) · MUH-12NV -
MSH-18NV - (WH) · MUH-18NV -
MSH-24NV - (WH) · MUH-24NV -
MSH-18NV - (WH) · MUH-18NV -
E3E3
E2E2
E2E2
E2E2
E2E2
E2E2
E1E1
E1E1
E1E1
E1E1
E1E1
No. OB207
MSH-18NV -
MSH-18NV -
MSH-18NV - E3
E2
E1
This Servise Manual OB207 deals with MSH-07/09/12/18/24NV-E1,
MUH-07/09/12/18/24NV-E1, MSH-18NV-E2, and MUH-18NV-E2 in
OB176 REVISED EDITION-A issued in July in1997.
Therefore, please refer to OB207, not to OB176 REVISED
EDITION-A, for the above models.
Refer to the Service Manual OB185 when MSH-07/09/12NV- , MSH-07/09/12/18NV- ,and MSH-18NV-
are connected with MXZ-32NV- as multi system units.
E1
E3E2E1
OB207t-1qxp 25/9/97 8:51 PM Page 1