LG AS-W1863 Series Svc Manual page 70

Troubleshooting Guide
The Compressor/Outdoor Fan are unable to drive.
Trouble 3
Operate Cooling Mode by setting the disired temperature of the remote controller is less
than one of the Indoor temperature by 1°C at least.
Check the sensor for Indoor temperature is attatched as close as to be effected by the
themperature of Heat Exchange (EVA.)
When the sensor circuit for Indoor temperature and connector are in bad connection or are
not engaged, Compressor/Outdoor fan is stopped.
• Check the related circuit of R02H(12.1K), R01H(6.2K), R04H(1K), R03H(1K), C01H(102),
C02H(102), Micom(pin No.
• Check the Indoor temperature sensor is disconnected or not (Resistance is about 10K at 25°C).
Check the Relay(RY-PWR) for driving Compressor.
• Check the voltage between brown and blue cable of terminal to connect the Outdoor
(About AC220V / 240V).
• Check the related circuit of relay in Outdoor PCB Ass'y.
Check Point
Between Micom(No.
GND
Between IC01M(No.
GND
Check the electrical wiring diagram of Outdoor side.
Check the open or short of connecting wires between Indoor and Outdoor.
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Only for training and service purposes
Turn on the main power.
When in air circulation mode, compressor/outdoor fan is stopped.
, ).
46 ) and
) and
15
Turn off main power.
Comp. ON
DC 5V
DC 1V↓
- 70 -
Comp. OFF
DC 0V
DC 12V
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