A5HL5-SF-1A-EN
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When problem occur, please check the following points before contacting a repair company.
Table 11. Troubleshooting
Problem Possible Cause 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
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 the 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, reseal 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 replace the
malfunctioning piece of equipment
The compressor is broken Replace the compressor
The voltage is too high or too low Install a monostatic to regulate the voltage
Poor heating
performance
The outdoor temperature is lower than 44.5℉ 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, reseal if necessary and top off
refrigerant
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