LG Electronics LA120HPO, LA090HPO, LA120CPO, LA120HPI, LA120CPI service manual Outdoor Unit

Troubleshooting Guide

OUTDOOR UNIT

Connector Type					Condition				Phenomena
							• All functions stop.
							• The operation with the remote controller, forced and
						OPEN
								test one do not operate.
	CN-POWER
				Connecting reversely				• PWB pattern is damaged when applying the power.
								• All functions stop or the compressor does not operate.
						OPEN
								• The operation with the remote controller, forced and test
								one do not operate.
	RY-COMP
	terminal
								• All functions stop.
				Connecting reversely
								• The operation with the remote controller, forced and test
								one do not operate.
								• All functions stop.
	CN-TRANS					OPEN		• The operation with the remote controller, forced and
								test one do not operate.
	CN-FAN					OPEN		• The Indoor Fan does not operate.
								• All functions stop.
The connecting
	wire of CN-					OPEN		• The operation with the remote controller, forced and test
	DC/DC, and							one do not operate.
	Indoor and
								• The only signal of remote controller operation/stop is
	Outdoor Unit				Connecting error			inputted, but the product does not operate.
		(				)		• The RED indicator of outdoor unit blinks 5 times after 2
								minutes with applying the power.
								• The beep sound, such as "beep, beep, beep, beep,
								beep", occurs periodically in Indoor unit.
	Blue
	Black				Connecting error			• The signal input of a remote controller and operation of
			(			)		product is impossible.
	Brown
	Red							• The RED indicator blinks 5 times after 2 minutes with
								applying the power.
								• The signal of remote controller is inputted, but the
								product does not operate.
					Connecting error
								• The RED indicator of outdoor unit and the operation
		(				)
								indicator of indoor one blinks 5 times after 2 minutes
								with applying the power.
								• No power for Indoor unit.
								• The signal input of the remote controller and opera-
					Connecting error
								tion of product is impossible.
			(			)
								• The thermal protector of the Power Trans operates
								when let it alone for long time.
								• The signal of the remote controller is inputted.
					Connecting error
								• The fuse and Q61 in the Outdoor unit are damaged
				(		)
								when the indoor fan is operated.
								• No power for Indoor unit.
								• The signal input of the remote controller and opera-
					Connecting error
								tion of product is impossible.
		(				)
								• The RED indicator of the Outdoor unit blinks 5 times
								after 2 minutes with applying the power.

70Room Air Conditioner