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TROUBLESHOOTING
Front Side
ISPM2
G Purpose
Symbol
PCB1
for Control
PCB2
for Fan
PCB3
for Inverter
PCB5
for "SNUBBER"
1-98
RAS-24FSG1, RAS-24FS5, RAS- 30FSG1 and RAS-30FS5
Electrical Control Box of Outdoor Unit
EF1
DCL
NF1
EF2
EF11
ISPM1
CMC1
NF10
CB
PCB
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
Fan Speed Control
1. Inverter power part is driven by instruction of PCB1 and compressor
is driven.
2. Overcurrent Control
3. Protection Control for Inverter Part
1. Restraining of Surge Voltage added to Transistor Module (IPM)
2. Absorbing for Switching Noise of Transistor Module (IPM)
Front Side
CMC3
CMC4
TB5
EF12
CMC2
The Interior of
the Electrical Control Box
CMC3
CMC4
CMC2
Purpose
TB4
EF8
EF7
TB3
EF6
EF5
TB1
CA1
EF4
EF3
CA3
TB2
TB4
PCB1
TB3
TF1
TB1
TF2
TB2
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Table of Contents
Troubleshooting
