Compressor/Outdoor Fan Are Unable To Drive - LG TMNC092DYAA Service Manual

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
• Check the circuit related to the relay.
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of
• Check the "open" or "short" of conmecting wires between indoor and
36 Multi Air Conditioner
terminal support transferred to compressor, PWB Assembly is normal.
Check point
Between Micom(No.
59) and GND
Between IC01M(No. 15)
and GND
Compressor/Outdoor Fan Motor.
outdoor.
Turn on Main Power
)" by setting the desired temperature of the
COMP ON
DC5V
Below DC 1V
(app)
Turn off Main Power
Cycle Troubleshooting Guide
COMP OFF
DC0V
About DC12V