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8
owner’s manual
Clean the heat exchanger.
Clean the air filter.
Eliminate all contaminants and make
filtrate the air.
Close doors and windows.
Draw curtains closed in order to shield
from sunshine.
Reduce heat source.
A/C cooling capacity is reduced (normal).
Check leakage and recharge refrigerant.
The air is flowing normally
but can’t completely cool
Unit starts or stops frequently
Insufficient cooling results
Low heating effect
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.
Possible 3 minute protection precaution
of compressor.
Too little or too much refrigerant inside.
Air or other concentrated gas in the
refrigerant circuit.
Malfuction of compressor.
Voltage is too high or too low.
System circuit is blocked.
Outdoor unit and/or indoor unit heat
exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor/outdoor units has
blockage.
Doors and windows are open.
Sunlight is shine directly onto unit.
Too many heat sources within the area.
Outdoor temp. is too high.
Leakage of refrigerant, or lack of
refrigerant.
Wait for the return of power.
Switch on the power.
Replace the fuse.
Replace the batteries, or check the con-
troller.
Set the temperature properly.
Wait 3 minutes and try again.
Check leakage, and recharge the
refrigerant.
Vacuum and recharge refrigerant.
Maintenance, or change compressor.
Install a manostat.
Trace the resolve the blockage.
Use heating device.
Close doors and windows.
Check leakage and recharge
refrigerant.
Outdoor temperature is lower than 7 C
Doors and windows not completely
closed.
Leakage of refrigerant, or lack of
refrigerant.
SolutionSymptoms Causes
Unit does not start
Table 9-2
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