Electronic Parts Troubleshooting Guide - LG ATNH126ELFB Service Manual

Troubleshooting Guide

Electronic Parts Troubleshooting Guide

The Product doesn't operate at all.
Trouble 1
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
Refer to the self-diagnosis function.
When Operation's ON?
Is the Connection between CN-POWER of indoor
Check the connecting state of connector
unit and terminal block?
Is the Connection of cable between indoor and
Check the diagram wiring on the control panel
Outdoor unit right?
Is the voltage of CN-POWER in outdoor
Check the main power.
PCB ASS'Y about AC220/240V?
Check the Fuse of outdoor PCB Ass'y.
Check the connecting state of wires
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 113