LG Electronics LA120CPI, LA120HPO, LA090HPO Phenomena in case of connecting error, Indoor Unit

Troubleshooting Guide

The phenomena in case of connecting error

INDOOR UNIT

Connector Type			Condition		Phenomena
	CN-DC/DC	Open and connecting error
				• The same as the phenomenon of Outdoor Unit.

Blue
Black
Brown
Red
							• The indoor fan does not operate.
CN-MOTOR					Open
							• The operation indicator of Indoor unit blinks 8 times.
					Open	• The up/down vane does not operate.
CN-UP/DOWN
			Short between terminals			• The up/down vane does not smoothly operate.
CN-DISP					Open		• It does not operate with a remote controller.
							• The operation indicator blinks once.
								On for 0.5 second
					Open
									Off for 3 seconds
							• The compressor and the outdoor fan stop.
							• The indoor fan speed is low.
CN-TH
						• The operation indicator blinks once
			Short between terminals				(on for 0.5 second, off for 3 seconds).
						• The compressor operates continuously regardless
	(			and	) of ROOM-TH.
							of the setting temperature and the variation of room
							temperature.
			Short between terminals			• The operation indicator blinks once
		(		and	) of PIPE-TH.		(on for 0.5 second, off for 3 seconds)
						• Continuous operation

Service Manual 69