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3. Troubleshooting
CAUTION
If one of the following conditions occurs, switch off 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 a malfunction and, in most situations, will not require repairs.
Issue Possible Causes
Unit does not turn on when
pressing ON/OFF button
The unit has a 3-minute protection feature that prevents the unit from overloading. The
unit cannot be restarted within three minutes of being turned off)
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 in order 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 in order to defrost the unit.
The unit changes from COOL
mode to FAN mode
The unit may change 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 off the compressor.
The unit will continue operating when the temperature fluctuates again.
The indoor unit emits white
mist
In humid regions, a large temperature difference between the room's air and the
conditioned air can cause white mist.
Both the indoor and outfoor
units emit white mist
When the unit restarts in HEAT mode after defrosting, 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 running the unit in HEAT mode due to expansion
and contraction of the unit's plastic parts.
11


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