LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0 Air Conditioner User Manual


 
Service Manual 79
The problem of missing the connector (INDOOR MAIN PCB ASSY)
The problem of missing the connector (OUTDOOR MAIN PCB ASSY)
Connectors
CN-AC/DC
CN-FAN
CN-DISP1
CN-T/Block
CN-DISP2
CN-TH
CN-U/D
Condition
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN/SHORT
OPEN
Malfunctions all indoor & outdoor unit.
Malfunctions remocon, force, test operation mode.
Malfunctions remote contoller.
Don't operate the power display module.
Malfunctions outdoor unit.
Stop compressor and outdoor fan motor.
The operation LED blinks 5 times.
Communication error.
Don't operate the power display module.
The operation LED blinks twice.
Enable to receive remote singnal.
Malfunctions UP/DOWN step motor.
Don't operate louver.
Malfunctions indoor fan motor.
Problem (error mode)
Connectors
Condition
OPEN
OPEN
OPEN
Stop compressor.
Malfunctions 4-WAY valve.
Malfunctions fan
Problem (error mode)
CN-TH
CN-UVW
CN-4 WAY
CN-FAN
CN-D-PIPE
OPEN/SHORT
OPEN/SHORT
The operation LED blinks twice.
The LED01M blinks twice.
The LED01M blinks 10 times.
Continue Comp. operation.
(when the discharge pipe TH opens)
Stop Comp. operation
(when the discharge pipe TH shorts)
Troubleshooting Guide