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Troubleshooting
SAFETY PRECAUTIONS
If any of the following conditions occurs, turn o your unit immediately!
The power cord is damaged or abnormally warm
•
You smell a burning odor
•
The unit emits loud or abnormal sounds
•
A power fuse blows or the circuit breaker frequently trips
•
Water or other objects fall into or out of the unit
•
DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED
SERVICE PROVIDER IMMEDIATELY!
Common Issues
The following problems are not a malfunction and in most situations will not require repairs.
Issue
Unit does not turn
on when pressing
ON/OFF button
The unit changes from
COOL/HEAT mode to
FAN mode
The indoor unit
emits white mist
Both the indoor and
outdoor units emit
white mist
The indoor unit makes
noises
Both the indoor unit
and outdoor unit make
noises
Possible Causes
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 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 fan 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 may change its setting to prevent frost from forming on the unit.
Once the temperature increases, the unit will start operating in the previously
selected mode again.
The set temperature has been reached, at which point the unit turns o the
compressor. The unit will continue operating when the temperature fluctuates
again.
In humid regions, a large temperature di erence between the room's air and the
conditioned air can cause white mist.
When the unit restarts in HEAT mode after defrosting, white mist may be emitted
due to moisture generated from the defrosting process.
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.
Low hissing sound during operation: This is normal and is caused by refrigerant gas
flowing through both indoor and outdoor units.
Low hissing sound 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.
Squeaking sound: Normal expansion and contraction of plastic and metal parts
caused by temperature changes during operation can cause squeaking noises.
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