14
Owner’s manual
7. TROUBLESHOOTING
7.1 Troubles and causes of air conditioner
Solution
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirt and to make the air
flow smoothly.
Close doors and windows.
Install curtains to provide shelter from
the sun.
Reduce heat sources.
AC cooling capacity reduces (normal).
Check leakage and add refrigerant.
Symptoms
Causes
Unit does not start
Air flows normally but
doesn’t cool
Unit starts or stops
frequently
Low cooling effect
Low heating effect
Power failure.
Power switch is off.
The power switch fuse may have burned
out
The remote controller’s batteries are dead.
Temperature is not set correctly.
The three-minute compressor for
protection is activated
There is too much or too little
refrigerant.
There is no gas in the refrigerating
circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
The outdoor unit and indoor unit of the
heat exchanger are dirty.
The air filter is dirty.
Inlet/outlet of the indoor/outdoor unit is
blocked.
Doors and windows are open.
Sunlight is directly shining on the unit.
Too much heat resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of
refrigerant.
Wait for the power to resume.
Switch on the power.
Replace the fuse.
Replace the batteries or check the
controller.
Set the temperature properly.
Wait.
Check leakage, and rightly recharge the
refrigerant.
Vacuum and recharge the refrigerant.
Maintenance or the change compressor.
Install manostat.
Find reasons and the solution.
Use a heating device.
Close doors and windows.
Check leakage and add refrigerant.
Outdoor temperature is lower than 7°C.
Doors and windows are not completely
closed.
Refrigerant is leaking or there’s not
enough.
Table 7-1
If one of the following faults occur, power the unit off and contact your dealer.
The remote controller receives malfunction or the button does not work well.
A safety device such as a circuit breaker frequently trips.
Obstacles and water enter the unit.
Water is leaking from the indoor unit.
Other malfunctions.
If the system does not run properly due to a reason other than those mentioned above, check the
system as follows. (See in Table 7-1)
