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Contents


CONTENTS
1. Specifications..........................................................................................................2
2. Outline and Dimensions .........................................................................................3
3. Installation Section..................................................................................................6
4. Operation ..............................................................................................................23
5. Wiring Diagram.....................................................................................................36
6. Refrigerant Cycle..................................................................................................38
7. Control Block Diagram .........................................................................................39
8. Trouble Shooting...................................................................................................41
9. Key Components of Electronic Circuit .................................................................71
10. Disassembly Instructions .....................................................................................75
1) Indoor Unit ........................................................................................................75
2) Outdoor Unit .....................................................................................................77
3) Exploded Diagram (Indoor Unit)......................................................................78
4) Exploded Diagram (Outdoor Unit)...................................................................83
5) Control Box Assembly......................................................................................85
1. SPECIFICATIONS
DMB-1812LH
MODEL DMB-1812LH (9K) DMB-1812LH (12K) DMB-1812LH (9K+12K)

Function Cooling Heating Cooling Heating Cooling Heating

Class T

Power AC 220-240V, 50Hz

W 2637.6 2637.6 3516.8 3516.8 5275.2 5275.2
Capacity
Btu/h 9000 9000 12000 12000 18000 18000

Dehumidification l/h 1.15 2.10 3.25

Running Current A 8.0 8.0 8.0 8.0 8.5 8.0
Electrical
Power Input W 1800.0 1800.0 1800.0 1800.0 1850.0 1800.0
Data
Starting Current A 49 A

Type Rotary (Hitachi)

Compressor Model SHW33TC4-U

Capacitor 50