LG Electronics LWP1830WAL, HB1803R, LWP1820PDL, LWP1820PEL, LWC182PLMM0 Troubleshooting Guide

Troubleshooting Guide

COMPLAINT	CAUSE	REMEDY
Compressor will not run,	Thermistor	Check the TEMP control. If not at the lowest number,
but fan motor runs.		set TEMP control to this setting and restart the unit.
		Check the continuity of the thermistor. Replace the
		thermistor if the circuit is open.
	Capacitor (Discharge	Check the capacitor.
	capacitor before servicing.)	Replace if not within ±10% of manufacturers rating.
		Replace if shorted, open, or damaged.
	Compressor	Check the compressor for open circuit or ground. If
		open or grounded, replace the compressor.
	Overload	Check the compressor overload, if externally mount-
		ed. Replace if open. (If the compressor temperature
		is high, remove the overload, cool it, and retest.)
Compressor cycles on	Voltage	Check the voltage.
overload.		If not within limits, call an electrician.
	Overload	Check overload, if externally mounted.
		Replace if open. (If the compressor temperature is
		high, remove the overload, cool, and retest.)
Compressor cycles on	Fan motor	If not running, determine the cause. Replace if
overload.		required.
	Condenser air flow restric-	Remove the cabinet. inspect the interior surface of
	tion	the condenser; if restricted, clean carefully with a vac-
		uum cleaner (do not damage fins) or brush. Clean the
		interior base before reassembling.
	Condenser fins (damaged)	If condenser fins are closed over a large area on the
		coil surface, head pressures will increase, causing
		the compressor to overload. Straighten the fins or
		replace the coil.
Compressor cycles on	Capacitor	Test capacitor.
overload.	Wiring	Check the terminals. If loose, repair or replace.
	Refrigerating system	Check the system for a restriction.
Insufficient cooling or heat-	Air filter	If restricted, clean of replace.
ing
	Exhaust damper door	Close if open.
	Unit undersized	Determine if the unit is properly sized for the area to
		be cooled.
Excessive noise	Turbo or fan	Check the set screw or clamp. If loose or missing,
		correct. If the turbo or fan is hitting air guide,
		rearrange the air handling parts.
	Copper tubing	Remove the cabinet carefully and rearrange tubing
		not to contact cabinet, compressor, shroud, and barri-
		er.

40Room Air Conditioner