LG ATNH126ELFB Service Manual page 70

When cooling does not operate
Trouble 3
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 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 Ass'y is normal.
• Check the circuit related to the relay.
Between two pin of DC
part in relay for COMP
Turn on Main Power
)" by setting the desired temperature of the
Check point COMP ON
Below DC 1V
COMP OFF
About DC12V
(app)
Troubleshooting Guide
Service Manual 115