LG Electronics AS-W096URH0/UBH0/UWH0/UMH0 Problem of missing the connector Indoor Main PCB Assy

Troubleshooting Guide

■The problem of missing the connector (INDOOR MAIN PCB ASSY)

Connectors	Condition	Problem (error mode)
	OPEN	• Malfunctions all indoor & outdoor unit.
CN-AC/DC		• Malfunctions remocon, force, test operation mode.
CN-FAN	OPEN	• Malfunctions indoor fan motor.
		• Malfunctions outdoor unit.
CN-T/Block	OPEN	• Stop compressor and outdoor fan motor.
		• The operation LED blinks 5 times.
		• Communication error.
CN-DISP1	OPEN	• Malfunctions remote contoller.
		• Don't operate the power display module.
CN-DISP2	OPEN	• Don't operate the power display module.
CN-TH	OPEN/SHORT	• The operation LED blinks twice.
		• Enable to receive remote singnal.
CN-U/D	OPEN	• Malfunctions UP/DOWN step motor.
		• Don't operate louver.

■The problem of missing the connector (OUTDOOR MAIN PCB ASSY)

Connectors	Condition	Problem (error mode)
CN-4 WAY	OPEN	• Malfunctions 4-WAY valve.
CN-FAN	OPEN	• Malfunctions fan
CN-TH	OPEN/SHORT	• The operation LED blinks twice.
		• The LED01M blinks twice.
		• The LED01M blinks 10 times.
CN-D-PIPE	OPEN/SHORT	• Continue Comp. operation.
		(when the discharge pipe TH opens)
		• Stop Comp. operation
		(when the discharge pipe TH shorts)
CN-UVW	OPEN	• Stop compressor.

Service Manual 79