1-98
TROUBLESHOOTING
Purpose
Symbol PCB
PCB1 for Control 1. Transmitting between Indoor Unit and Outdoor Unit
2. Processing for Sensor Input
3. Processing for Dip Switch Input
4. Operation Control for Above Items 1 to 3.
Compressor Operation Control, Bypass Valve Control, Fan Control
and Overcurrent Control
5. 7-Segment Indication
6. Processing of Safety Device Input
7. Processing of Relay Output
8. Reverse Phase Detection for Power Source
PCB2 for Fan Fan Speed Control
PCB3 for Inverter 1. Inverter power part is driven by instruction of PCB1 and compressor
is driven.
2. Overcurrent Control
3. Protection Control for Inverter Part
PCB5 for "SNUBBER" 1. Restraining of Surge Voltage added to Transistor Module (IPM)
2. Absorbing for Switching Noise of Transistor Module (IPM)
Purpose
RAS-24FSG1, RAS-24FS5, RAS- 30FSG1 and RAS-30FS5
Front Side
NF1
DCL
CMC1
CB
EF1
EF2
TB5
EF11
EF12
NF10
EF4
EF3
EF5
CA3
CA1
EF7
EF6
EF8
ISPM1ISPM2
The Interior of
the Electrical Control Box
Front Side
TB1
TB3
TB4
TB2
PCB1
Electrical Control Box of Outdoor Unit
CMC3
CMC2
CMC4
CMC3
CMC2
CMC4
TF1
TF2
TB3
TB1
TB4
TB2
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