Haier HSU-18R04, HSU-09R04 Trouble shooting, Before asking for service, check the following first

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.
	During unit operation or at stop, a swishing
	or gurgling noise may be heard. At first 2-3
Noise is heard	minutes after unit start, this noise is more
	noticeable. (This noise is generated by
	refrigerant flowing in the system.)
Normal	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.
Does not work at all.	Is power plug inserted?
Multiple
	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?

Application temp. range of air conditioner -7oC~43oC.

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