Symptoms Causes
Solution
Unit does not start
•
Power failure.
•
Power switch is off.
•
Fuse of power switch may have burned.
•
Batteries of remote controller exhausted
or other problem of controller.
•
W ait for the comeback of power.
•
Switch on the power.
•
Replace the fuse.
•
Replace the batteries or check the
controller.
Air flowing normally but
completely can't cooling
•
Temperature is not set correctly.
•
Be in 3 minutes protection of compressor.
•
Set the temperature properly.
•
Wait.
Units start or stop
frequently
•
Refrigerant is too little or too much.
•
Airor no concreting gas in the refrigerating
circuit.
•
Compressor is malfunction.
•
Voltage is too high or too low.
•
System circuit is blocked.
•
Check leakage, and rightly recharge
refrigerant.
•
Vacuum and recharge refrigerant.
•
Maintenance or change compressor.
•
Install manostat.
Low cooling 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
•
Sunlight directly shine.
•
Too much heat resource.
•
Outdoor temp. is too high.
•
Leakage of refrigerant or lack of
refrigerant.
•
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).
Low heating effect
•
Outdoor temperature is lower than 7°C .
•
Doors and windows not completely
closed.
•
Leakage of refrigerant or lack of
refrigerant.
•
Check leakage and rightly recharge
refrigerant.
•
Use heating device.
•
Close doors and windows.
•
Check leakage and rightly recharge
refrigerant.
Table 8-2
Symptoms Causes
Solution
The fan speed can not be
changed.
•
Check whether the MODE indicated on the
display is "AUTO"
When the automatic mode is selected, the
air conditioner will automatically change
the fan speed.
•
Check whether the MODE indicated on the
display is "DRY"
When dry operation is selected, the air
conditioner automatically change the fan
speed. The fan speed can be selected
during "COOL" , "FAN ONLY", and
"HEAT".
The remote controller
signal is not transmitted
even when the ON/OFF
button is pushed.
•
Check whether the batteries in the remote
controller are exhausted.
The power supply is off.
The TEMP. indicator does
not come on.
•
Check whether the MODE indicated on the
display is FAN ONLY
The temperature cannot be set during FAN
mode.
The indication on the
display disappears after
a lapse of time.
•
Check whether the timer operation has
come to an end when the TIMER OFF is
indicated on the display.
The air conditioner operation will stop up
to the set time.
The TIMER ON indicator
goes off after a lapse of
certain time.
•
Check whether the timer operation is
started when the TIMER ON is indicated on
the display.
Up to the set time, the air conditioner will
automatically start and the appropriate
indicator will go off.
No receiving tone sounds
from the indoor unit even
when the ON/OFF button
is pressed.
•
Check whether the signal transmitter of the
remote controller is properly directed to the
infrared signal receiver of the indoor unit
when the ON/OFF button is pressed.
Directly transmit the signal transmitter of
the remote controller to the infrared signal
receiver of the indoor unit, and then
repeatly push the ON/OFF button twice.
Table 8-3
