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Problem Possible Causes
Dust is emitted
from either the
indoor or out-
door unit
The unit may accumulate dust during extended periods of non-use, which will be emitted when
the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.
The unit emits a
bad odor
The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.)
which will be emitted during operations.
The unit's lters have become moldy and should be cleaned.
The fan of the
outdoor unit
does not operate
During operation, the fan speed is controlled to optimize product operation.
Problem Possible Causes Solution
The unit is not
working
Power failure Wait for the power to be restored
The power switch is o 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 the ambient room temperature Lower the temperature setting
The heat exchanger on the indoor or
outdoor unit is dirty Clean the aected heat exchanger
The air lter is dirty Remove the lter and clean it according to instructions
The air inlet or outlet of either unit is
blocked
Turn the unit o, 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 o
refrigerant
The unit
starts and stops
frequently
There's too much or too little refriger-
ant 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 manostat to regulate the voltage
Poor heating
performance
The outdoor temperature is lower than
7°C (44.5°F)
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 o
refrigerant
When troubles occur, please check the following points before contacting a repair company.
Troubleshooting Tips
12


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