LG FMN0760NL - Troubleshooting: PCB Connector Issues

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■ The problem of missing the connector (INDOOR MAIN PCB ASSY)
Connectors
CN-POWER
(AC2)
CN-FAN
CN-DATA
CN-DISP1
CN-TH
CN-U/D
Condition
OPEN
OPEN
OPEN
OPEN
OPEN/SHORT
OPEN
• Malfunctions all indoor & outdoor unit.
• Malfunctions remocon, force, test operation mode.
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan motor.
• The operation LED blinks 5 times.
• Communicaion error.
• Malfunctions remote contoller.
• Don't operate the power display module.
• The operation LED blinks once.
• Enable to receive remote singnal.
• Malfunctions UP/DOWN step motor.
• Don't operate louver.
• Malfunctions indoor fan motor.
Problem (error mode)