LG LCN240CP - Manual (Page 33)

Service Manual 33
Troubleshooting Guide
Electronic Parts Troubleshooting Guide
The Product doesn’t operate at all.
Turn off the main power and wait until LED on outdoor PCB is off
Turn on the main power again.
Does the Operating LED of indoor unit blink
When Operation's ON?
Refer to the self-diagnosis function.
Is the Connection between CN-POWER of indoor
unit and terminal block? Check the connecting state of connector
Is the Connection of cable between indoor and
Outdoor unit right?
Check the diagram wiring on the control panel
Is the voltage of CN-POWER in outdoor
PCB ASS'Y about AC220/240V?
Check the main power.
Check the Fuse of outdoor PCB Ass'y.
Check the connecting state of wires
Confirm Auto Addresssing work method
Check the Auto Addressing Work
Replace the PCB Ass'y
* The product's operation starts at three minutes after main power turning on
Trouble 1