LG LMU240HE Service Manual - Page 68

Product doesn't operate with the remote controller.

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Troubleshooting Guide Trouble 2 Product doesn't 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 as force.) Caused by the remote controller. Caused by other parts except the remote controller When the mark ( ) is displayed in LCD screen, replace battery. Check the contact of CN-DISP 1 connector When the detect switch (double key) inside the remote controller door is fault, it is impossible to operate temperature regulating(L / M) and wind speed selecting. Check DISP PWB Ass'y -Voltage between CN1 DC +5V Check the Display PWB Ass'y • Check receiver ass'y 68 Multi type Air Conditioner

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68
Multi type Air Conditioner
Troubleshooting Guide
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 as force.)
Caused by the remote controller.
Caused by other parts except
the remote controller
When the mark (
) is displayed in LCD
screen, replace battery.
Check the contact of CN-DISP 1 connector
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 DISP PWB Ass'y
-Voltage between CN1
➀
-
➆
: DC +5V
Check the Display PWB Ass'y
•
Check receiver ass'y
Product doesn't operate with the remote controller.
Trouble 2