Owner's Manual

Table 7-2
Solution
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirt.
Close doors and windows.
Adjust curtains to shelter unit from
sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage and rightly recharge
refrigerant.
Symptoms Causes
Unit does not start
Air flowing normally however
unit is not cooling cooling
Units starts or stops
frequently
Low cooling effect
Low heating effect
Outdoor unit and indoor unit heat
exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor/outdoor units is
blocked.
Doors and windows are open
Direct sunlight on unit.
A strong heat source nearby. heat
resource.
Outdoor temp. is too high.
Leakage of refrigerant or lack of
refrigerant.
Use heating device.
Close doors and windows.
Check leakage and rightly recharge
refrigerant.
Outdoor temperature is lower than
44.6˚F/7˚C
Doors and windows not completely
closed.
Leakage of refrigerant or lack of
refrigerant.
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted
or other problem of controller.
Temperature is not set correctly.
Unit is in 3 minutes protection mode for
the compressor.
Refrigerant is too low or too high.
Air or no concentrating gas in the
refrigerating circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Wait for the return of power.
Switch on the power.
Replace the fuse.
Replace the batteries or check the
controller.
Set the temperature properly.
Wait.
Check leakage, and rightly recharge
refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.
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