Haier HPU-24C03 User Manual - Page 23

Trouble shooting

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Trouble shooting Before asking for service, check the following first. Phenomenon The system does not restart immediately. Noise is heard Normal Performance inspection Smells are generated. Mist or steam are blown out. Cause or check points When unit is stopped, it won't 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 of temperature changes 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 furniture, cigarettes. During COOL or DRY operation, indoor unit may blow out mist. This is due to the sudden cooling of indoor air. Multiple check Does not work at all. Is power plug inserted? Is there a power failure? 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? 22

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22
T
rouble shooting
B
efore as
k
ing for ser
v
ice
,
chec
k
the follo
w
ing first.
N
ormal
Performance
inspection
N
oise is heard
Phenomenon
C
ause or chec
k
points
T
he s
y
stem does not restart
immediatel
y
.
S
mells are generated.
Mist or steam are blo
w
n out.
Multiple
chec
k
D
oes not
w
or
k
at all.
Poor cooling
When unit is stopped
,
it
w
on
'
t restart
immediatel
y
until 3 minutes ha
v
e elapsed
to protect the s
y
stem.
When the electric plug is pulled out and
reinserted
,
the protection circuit
w
ill
w
or
k
for 3 minutes to protect the air conditioner.
D
uring unit operation or at stop
,
a s
w
ishing
or gurgling noise ma
y
be heard.
A
t first 2
-
3
minutes after unit start
,
this noise is more
noticeable. (
T
his noise is generated b
y
refrigerant flo
w
ing in the s
y
stem.)
D
uring unit operation
,
a crac
k
ing noise ma
y
be heard.
T
his noise is generated b
y
the
casing e
x
panding or shrin
k
ing because of
temperature changes
S
hould there be a big noise from air flo
w
in
unit operation
,
air filter ma
y
be too dirt
y
.
T
his is because the s
y
stem circulates smells
from the interior air such as the smell of
furniture
,
cigarettes.
D
uring
C
OO
L
or
DR
Y operation
,
indoor unit
ma
y
blo
w
out mist.
T
his is due to the sudden
cooling of indoor air.
I
s po
w
er plug inserted?
I
s there a po
w
er failure?
I
s fuse blo
w
n out?
I
s the air filter dirt
y
?
N
ormall
y
it should be
cleaned e
v
er
y
15 da
y
s.
A
re there an
y
obstacles before inlet and outlet?
I
s temperature set correctl
y
?
A
re there some doors or
w
indo
w
s left open?
I
s there an
y
direct sunlight through the
curtain)
w
indo
w
during the cooling operation?(
U
se
A
re there too much heat sources or too man
y
people in the room during cooling operation?