R
DURASTAR.COM
23
TROUBLESHOOTING
If trouble occurs, please check the following points before contacting a repair company.
PROBLEM POSSIBLE CAUSES SOLUTION
Poor cooling
performance
Temperature setting may be higher
than ambient room temperature.
Lower the temperature setting.
The heat exchanger on the indoor
or outdoor unit is dirty.
Clean the affected heat exchanger.
The air filter is dirty.
Remove the filter and clean it according
to instructions.
The air inlet or outlet of either unit is
blocked.
Turn the unit off, remove the obstruction
and turn it back on.
Doors and windows are open.
Make sure that all doors and windows are
closed while operating the unit.
Excessive heat is generated by
sunlight.
Close windows and curtains during
periods of high heat or bright sunshine.
Low refrigerant due to leak or long-
term use.
Check for leaks, re-seal if necessary and
top off refrigerant.
Too many sources of heat in
the room (people, computers,
electronics, etc.).
Reduce amount of heat sources.
SILENCE function is activated
SILENCE function can lower product
performance by reducing operating
frequency. Turn off SILENCE function.
Poor heating
performance
The outdoor temperature is
extremely low.
Use auxiliary heating device.
Cold air is entering through doors
and windows.
Make sure that all doors and windows are
closed during use.
Low refrigerant due to leak or
long-term use.
Check for leaks, re-seal if necessary
and top off refrigerant.
The unit
starts
and stops
frequently
There’s too much or too little
refrigerant in the system.
Check for leaks and recharge the system
with refrigerant.
Incompressible gas or moisture has
entered the system.
Evacuate and recharge the system with
refrigerant.
The compressor is broken. Replace the compressor.
The voltage is too high or too low. Install a manostat to regulate the voltage.
Indicator
lamps
continue
flashing or
error code
appears
The unit may stop operation or continue to run safely. If the indicator lamps
continue to flash or error codes appear, wait for about 10 minutes. The problem
may resolve itself.
If not, disconnect the power, then connect it again. Turn the unit on.
If the problem persists, disconnect the power and contact your nearest
customer service center.
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