Haier HSU-18RC03/R2(DB), HSU-09RC03/R2(DB), HSU-12RC03/R2(DB), HSU-22RC03/R2(DB) Trouble shooting

Trouble shooting

Before asking for service, check the following first.

	Phenomenon	Cause or check points
	The system does not restart	When unit is stopped, it won't restart
	immediately.
		immediately until 3 minutes have elapsed
		to protect the system.
		When the electric plug is pulled out and
		reinserted, the protection circuit will work
		for 3 minutes to protect the air conditioner.
	Noise is heard:	During unit operation or at stop, a swishing
		or gurgling noise may be heard. At first 2-3
		minutes after unit start, this noise is more
		noticeable. (This noise is generated by
Normal		refrigerant flowing in the system.)
		During unit operation, a cracking noise may
Performance		be heard. This noise is generated by the
inspection		casing expanding or shrinking because of
		temperature changes.
		Should there be a big noise from air flow in
		unit operation, air filter may be too dirty.
	Smells are generated.	This is because the system circulates smells
		from the interior air such as the smell of
		furniture, cigarettes.
	Mist or steam are blown out. During COOL or DRY operation, indoor unit
		may blow out mist. This is due to the sudden
		cooling of indoor air.
Multiple	Does not work at all.	Is power plug inserted?
		Is there a power failure?
check
		Is fuse blown out?
	Poor cooling	Is the air filter dirty? Normally it should be
		cleaned every 15 days.
		Are there any obstacles before inlet and outlet?
		Is temperature set correctly?
		Are there some doors or windows left open?
		Is there any direct sunlight through the
		window during the cooling operation?(Use
		curtain)
		Are there too much heat sources or too many
		people in the room during cooling operation?

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