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Trouble Shooting - Haier HSU-12LNA/022L(W) Operational Manual

Split type on-off room air conditioner
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Trouble Shooting

Please check the instructions before service.
The system does not
restart immediately.
Noise is heard.
Smells are generated.
Mist or steam are blown out.
Cause or check points
When unit is stopped, it won's restart
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
minutes after unit start, this noise is more
noticeable. (This noise is generated by
refrigerant flowing in the system).
During unit operation a cracking noise may
be heard. This noise is generated by the
casing expanding or shrinking because or
temperature changes.
Should there be a big noise from air flow in
unit operatio, air filter may be too dirty.
This is because the system circulates
smells from the interior air such as the
smell of furniture, cigarettes.
During COOL or DRY operation, indoor
unit may blow out mist. This is due to the
sudden cooling of indoor air.
Trouble Shooting
Does not work at all
Poor cooling
Application temp, range of air conditioner 7 C - 43 C.
Cause or check points
Is power plug inserted?
Is there a power failure?
Is fuse blown out?
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 come 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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