LG Electronics LF300CP(LP-C303R20), LF480CE(LP-C483TA0) Both blower and compressor are working

The unit is working, but not cooling and heating sufficiently

(Both blower and compressor are working)

WHAT TROUBLED	COMPLAINTS	HOW TO CHECK	REMEDY
Load	Much heat load	Heat load increased.	Do necessary disposal
		Window or door has many	respectively.
		cracks or gaps.
Air flow	Obstacle disturbs Intake	Checking	Correct it.
	of uniform wind.
Short air volume	Reverse rotation of	Checking	Correct it.
	blower.
Refrigerant	Shortage in the charged	Coil inlet pipe is frosted	Replenish it.
	refrigerant.		(Repair the leakage spot).
Air passage	Improper or foreign bodies	Checking	Correct or clear the
			foreign bodies.
Air filter	Clogged with dust	Checking	Cleaning

9.4 All the functions are performed normally, but very noisily and much vibratively.

WHAT TROUBLED	COMPLAINTS	HOW TO CHECK	REMEDY
Compressor	Liquid refrigerant flooding	• Check for refrigerant over-charge.
	back from the evaporator.	• Check to see if the intaking air temperature is
		extremely cold.
		• Check for insufficient air flow quantity.
	Compressor shipping	• Checking	• Remove the shipping
	bracket is not removed.		bracket.
	Faulty discharge valve and	• Checking	• Replace the
	suction valve.		compressor
Blower	Fan broken.	Checking	• Repair or replace it.
	Other materials intruded.		• Clear the other
			material
Screws	Looseness or fail-off of	Checking	Repair
	screws

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