Compressor/Outdoor Fan Are Unable To Drive - LG AS-H0764DM0 Service Manual

Troubleshooting Guide

Compressor/Outdoor Fan are unable to drive.

Operate "Cooling Mode(
remote controller is less than one of the indoor temperature by 1°C at least.
When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.
Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(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 RY-FAN.
• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C).
Check Relay(RY - COMP) for driving compressor.
• When the power(About AC220V/240V) is applied to the connecting wire
terminal support transferred to compressor, PWB Assembly is normal.
• Check the circuit related to the relay.
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of
Compressor/Outdoor Fan Motor.
• Check the "open" or "short" of conmecting wires between indoor and
outdoor.
58 Room Air Conditioner
Turn on Main Power
)" by setting the desired temperature of the
Check point
Between Micom(No.
59) and GND
Between IC01M(No. 15)
and GND
Turn off Main Power
COMP ON COMP OFF
DC5V DC0V
Below DC 1V
About DC12V
(app)