LG LCU340CP Service Manual - Page 33

Electronic Parts Troubleshooting Guide

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

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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