LG Electronics LA120CPI, LA120HPO, LA090HPO Product is not operate with the remote controller

Troubleshooting Guide

The product is not operate with the remote controller.

Turn on Main Power

While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped.

When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller. (When operated in the Sleeping Mode, the wind speed is set to the low speed by force.)

Cause by the remote controller

When the mark( ) is displayed in LCD screen, replace battery.

When the detect switch(double key) inside the remote controller door is fault, it is impossible to operate temperature regulating(/) and wind speed selecting.

Check the connecting circuit between the remote controller MICOM (No. ) - R17(2Ω ) - IR LED - Q1 - R16(2.2KΩ ).

Caused by other parts except the remote controller

Check the contact of CN-DISP connector.

Check DISP PWB Ass'y

- Voltage between CN DISP - : DC +5V

Check point

•Check the connecting circuit between PIN 43 - R11L(1K) - C11L(680PF) - MICOM PIN

•Check Receiver Ass'y

64Room Air Conditioner