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18
BEFORE CALLING FOR SERVICE
The following conditions do not denote equipment malfunctions
UNIT DOES NOT OPERATE
• The unit will not operate if it is turned on
immediately after it is turned off. The unit
will not operate immediately after the
mode is changed. This is to protect the
internal mechanisms. Wait 1.5~3 minutes
before operating the unit.
• The unit will not operate immediately after
the circuit breaker is turned on. This is the
safety mechanism to protect the
compressor. Wait for 90 seconds.
UNIT DOES NOT SEND OUT WARM
AIR
The unit is preheating or de-icing.
CRACKING NOISE
The unit may produce a cracking noise. This
sound is generated by the friction of the front
panel and other components expanding or
connecting due to a temperature change.
INDOOR UNIT BECOMES WARM EVEN
WHEN IDLE
This is because the refrigerant also flows
through the idle indoor unit's pipes when the
other unit operated.
If the unit appears to be malfunctioning, check the following points before calling for
service.
IF THE UNIT FAILS TO OPERATE
ODORS
Carpet and furniture odors that entered into
the unit and the air conditioner's inner com-
ponent odors at the early stage of installa-
tion may be sent out from the unit.
SWISHING NOISE
The soft, swishing noise is the sound of the
refrigerant flowing inside the unit.
WATER VAPOUR
• In the COOL and DRY operation, water va-
pour can sometimes be seen at the air out-
let due to the difference between the room
air temperature and the air discharged by
the unit.
• In the HEAT operation, water vapour may
flow out of the outdoor unit during de-icing.
THE OUT DOOR UNIT DOES NOT STOP
After stopping the operation, the outdoor unit
will rotate its' fan for about 80 seconds to cool
down the unit.
UNIT DOES NOT OPERATE IN YOUR
REQUESTED MODE
• When one indoor unit is operationg in COOL
or DRY mode, you can not operate the other
unit in HEAT mode. (4 seconds later, a long
BEEP will be emitted, and OPERATION
lamp and TIMER lamp will blink alternately.)
• When one indoor unit is operationg in HEAT
mode, you can not operate the other unit in
COOL nor DRY mode. (4 seconds later, a
long BEEP will be emitted, and OPERA-
TION lamp and TIMER lamp will blink alter-
nately.)
Check to see if the circuit breaker has tripped or the fuse has blown.
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