Haier HW-12C03 Service Manual page 103

REPAIRING
Before asking for service, check the following first.
The system does not
restart immediately.
Normal
Performance
inspection
Smells are generated.
Mist or steam are
Does not work at all
Double
check
Application temp. range of air conditioner -7
Phenomenon
Noise is heard.
blown out.
Poor cooling
Cause or check points
When unit is stopped,it won't restart immediately until
3 minutes have elasped 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 when unit starts
this noise is more noticeable.(This noise is generated by
refrigerant flowing in the systen.)
During unit operation, a cracking noise may be heard.
This noise is generated by the casing expanding or shrinking
because of temperat re changes. u
Should there be a big noise from air flow in unit operation,
air filter may be too dirty.
This is because the system circulates smells from the
interior air such as the smell of furnit re, cigarettes.
During COOL or DRY operation,indoor unit may blow
out mist.This is due to the sudden cooling of indoor air.
ls electric plug inserted?
ls there a power failure?
ls fuse blown out?
ls the air filter dirty? Normally it should be cleaned every
15 days.
Are there any obstacles in intet and outlet?
ls temperature set correctly?
Are there some doors or windows left open?
ls 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?
~43 .
106
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