LG LV-B1864HL - Operation Limit; Cooling Operation Limits; Heating Operation Limits; Power Source and Starting Voltage Limits

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Only for training and service purposes
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Possible Trouble 3
: Up/Down Air direction louver does not operate.
Possible Trouble 4
: Remote controller does not operate.
YES
NO
YES
Is IC01M operated
normally?
Is the PIN 1 of
CN-UP/DOWN DC12V?
Check the step motor
and connector
(CN-UP/DOWN 1,2)
Check the main P.C.B
DC12V pattern
NO
Exchange IC01M
NO
YES
YES
YES
Is the battery consumed
much?
Is the PIN 8 of CN-DISP
DC5V?
Is the connection of
CN-DISP all right?
Exchange receiver ass'y
Connect CN-DISP exactly
NO
NO
Exchange the battery
Check the main P.C.B
DC5V pattern