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Troubleshooting Tips
When troubles occur, please check the following points before contacting a repair company.
Problem Possible Causes Solution
The unit is not
working
Power failure Wait for the power to be restored
The power switch is off Turn on the power
The fuse is burned out Replace the fuse
Remote control batteries are dead Replace the remote control batteries
The unit's 3-minute protection has been
activated Wait three minutes after restarting the unit
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 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
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
There is air, incompressible gas or foreign
material in the refrigeration system Evacuate and recharge the system with refrigerant
System circuit is blocked Determine which circuit is blocked and re-place
the malfunctioning piece of equipment
The compressor is broken Replace the compressor
The voltage is too high or too low Install a manostat to regulate the voltage
Poor heating
performance
The outdoor temperature is lower than 7ºC
(44.5ºF)
Check for leaks and recharge the system with
refrigerant
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
13


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