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Page 10
Troubleshooting
CAUTION
If one of the following conditions occurs, switch o the power supply immediately and contact
your dealer for further assistance.
• The operation light continues to flash rapidly after the unit has been restarted
• The remote control buttons do not work
• The unit continually trips fuses or circuit breakers
• A foreign object or water enters the air conditioner
• Other abnormal situations
Common Problems
The following symptoms are not malfunctions and in most situations will not require repairs:
ProblemPossible Causes
The unit does not
turn on when the
ON/OFF button
is pressed
The unit has a 3-minute protection feature that prevents it from
overloading. The unit cannot be restarted within 3 minutes of being
turned o.
Cooling and heating models: If the operation light and PRE-DEF (Pre-heating/
defrost) indicators are lit up, the outdoor temperature is too cold and the unit’s
anti-cold wind is activated to defrost the unit.
In cooling-only models: If the “fan only” indicator is lit up, the outdoor
temperature is too cold and the unit’s anti-freeze protection is activated to
defrost the unit.
The unit changes
from COOL mode
to FAN mode
The unit changes its setting to prevent frost from forming on the unit. Once
the temperature increases, the unit will start operating again.
The set temperature has been reached, at which point the unit turns o the
compressor. The unit will resume operating when the temperature fluctuates
again.
The indoor unit
emits a white mist
In humid regions, a large temperature dierence between the room’s air and
the conditioned air can cause a white mist.
Both the indoor
and outdoor units
emit a white mist
When the unit restarts in HEAT mode after defrosting, a white mist may be
emitted due to moisture generated from the defrosting process.
The indoor unit
makes noises
A squeaking sound is heard when the system is OFF or in COOL mode. The
noise is also heard when the drain pump (optional) is in operation.
A squeaking sound may occur after the unit is run in HEAT mode due to
expansion and contraction of the unit’s plastic parts.
Both the indoor
and outdoor units
make noises
A low hissing sound may occur during operation. This is normal and is caused
by refrigerant gas flowing through both the indoor and outdoor units.
A low hissing sound may be heard when the system starts, has just stopped
running, or is defrosting. This noise is normal and is caused by the refrigerant
gas stopping or changing direction.
The outdoor unit
makes noises
The unit will make dierent sounds based on its current operating mode.
Troubleshooting
4
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