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DURASTAR.COM
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TROUBLESHOOTING
SAFETY PRECAUTIONS
If ANY of the following conditions occur, turn off 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 PROVID-
ER IMMEDIATELY!
COMMON ISSUES
The following problems are not malfunctions and in most situations do not require repairs.
ISSUE POSSIBLE CAUSES
The unit changes from
COOL/HEAT 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 in the previ-
ously selected mode 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.
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.
Outdoor units emit
white mist
When the unit restarts in HEAT mode after defrosting, white mist may be
emitted due to moisture generated during the defrosting process.
Both the indoor unit
and outdoor unit make
noises
Low hissing sound during operation: This is normal and is caused by re-
frigerant 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 met-
al parts caused by temperature changes during operation can cause
squeaking noises.
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