Electronic Parts Troubleshooting Guide - LG A2UC146FA0 Service Manual

Electronic Parts Troubleshooting Guide

Electronic Parts Troubleshooting Guide
1. The Outdoor Unit does not operate at all
Does the Operating LED of indoor unit blink
when Operation's ON?
Is the Connection between CN-Power of indoor
unit and terminal block?
Is the connection of cable between indoor and
outdoor unit ringht?
Is the voltage of CN-POWER
PCB Ass'y about AC220V / 240V?
Check the Fuse of outdoor PCB Ass'y.
Chek the connecting state of wires
Replace the PCB Ass'y.
* TPS units start at three minutes after main power turning on.
52 Free Joint Multi Air Conditioner
NO
YES
YES
in outdoor
YES
NO
NO
Refer to the self-diagnosis function.
NO
Check the connecting state of connector
NO
Indoor
1(L)(Brown)
2(N)(Blue)
(Green/YL)
3(Red)
NO
Check the main power
Outdoor
1(L)(Brown)
2(N)(Blue)
(Green/YL)
3(Red)