LG AS-W1863 Series Svc Manual page 78

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