LG LK-0580HC Service Manual page 39

Possible trouble 5
Is the unit operating?
YES
Is the cooling mode?
YES
Set Temp. < Room Temp.?
YES
Is the output
voltage of IC02D on the MAIN
PCB DC5V?
YES
Is the output
voltage of IC01M's 13/12(COMP B)PIN
on the MAIN PCB DC0V?
YES
Is the voltage
between A/B(COMP B) of CN-COMP
and NEUTRAL 220V?
YES
Is the magnetic contactor
for compressor ON?
YES
1. Check Compressor and
Capacitor for Compressor.
NOTE: 3ø model has not capacitor for compressor.
: No cooling operation performed.
NO
NO
NO
NO
NO
NO
NO
— 39 —
1. Press power ON/OFF button.
1. Press cooling operation key.
2. After reenergizing power supply,
press power "ON/OFF" button.
1. Set following.
'Set Temp. < Room Temp.'
1. Check or exchange IC01D,
IC02D on the MAIN PCB.
1. Check or exchange IC01M.
2. Check 3-minutes time delay.
1. Check or exchange RY4/RY5(COMP B).
1. Check the wiring of Magnetic
contactor.
2. Exchange Magnetic contactor.