LG TN-C090BT00 Service Manual page 22

Electronic parts Troubleshooting Guide
Possible trouble 7
Is the indoor fan operation?
YES
Is the HUMID LCD "ON"?
YES
Is the output
voltage of Micom's 3PIN on
the MAIN PCB 5V?
YES
Is the voltage
between 1PIN of CN5 and
NEUTRAL 220V?
YES
Is the magnetic
contactor for humidifier OK?
YES
Check the humidifier.
: No humidifier operation performed.
NO
NO
NO
NO
NO
22
1. Press cooling or fan operation
or heater operation key.
1. Press humidifier Key.
1. Check or exchange IC02D
on the MAIN PCB.
1. Check or exchange RY3.
1. Check the wiring or Magnetic
contactor.
2. Exchange Magnetic contactor.