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Table 7-2
Symptoms
Unit does not start
Air flowing normally but
completely can't cooling
Units start or stop frequently
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owner's manual
10
Causes
•
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.
•
Be in 3 minutes protection of
compressor.
•
Refrigerant is too little or too much.
•
Air or no concretingc gas in the
refrigerating circuit.
•
Compressor is malfunction.
•
Voltage is too high or too low.
•
System circuit is blocked.
•
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
•
Sunlight directly shine.
•
Too much heat resource.
•
Outdoor temp. is too high.
•
Leakage of refrigerant or lack of
refrigerant.
•
Outdoor temperature is lower than 7 °C
•
Doors and windows not completely
closed.
. Leakage of refrigerant or
lack of
refrigerant.
Solution
•
Wait for the comeback of power.
•
Switch on the power.
•
Replace the fuse.
•
Replace the batterises 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.
•
Clean the heat exchanger.
•
Clean the air filter.
•
Eliminate all dirties and make air
smooth.
•
Close doors and windows.
•
Make curtains in order to shelter from
sunshine.
•
Reduce heat source.
•
AC cooling capacity reduces (normal).
•
Check leakage and rightly recharge
refrigerant.
•
Use heating device.
•
Close doors and windows.
•
Check leakage and rightly recharge
refrigerant.
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