13
Table 7-1
Symptom
Possible Cause
Solution
The unit does not start.
●
Power failure.
●
Power breaker is off.
●
Batteries of the remote controller are depleted
or there is another problem with the controller.
●
Wait for the power supply to be restored.
●
Turn on the power.
●
Replace the batteries or check the
controller.
Air is flowing normally but offers zero
cooling effect.
●
Temperature is not set correctly.
●
The unit’s compressor is in the 3-7 minutes
protection period.
●
Set the temperature properly.
●
Wait.
Units start or stop frequently.
●
Refrigerant is too little or too much.
●
There is air or no condensing gas in the
refrigerating circuit.
●
The compressor is malfunctioning.
●
Voltage is too high or too low.
●
The system circuit is blocked.
●
Check for leakage and correctly recharge
refrigerant.
●
Vacuum and recharge refrigerant.
●
Maintain or change compressor.
●
Install a manostat.
●
Find reasons and solutions.
Poor cooling effect.
●
The heat exchangers of the ODU and IDU are
dirty.
●
The air filter is dirty.
●
Inlet/outlet of IDU/ODU is blocked.
●
Doors and windows are open.
●
The unit is directly exposed to sunlight.
●
There are too many heat sources.
●
Outdoor temp. is too high.
●
Leakage of refrigerant or lack of refrigerant.
●
Clean the heat exchanger.
●
Clean the air filter.
●
Eliminate all dirt and allow air to flow smoothly.
●
Close doors and windows.
●
Install or close curtains in order to shade
the unit from sunshine.
●
Reduce heat source.
●
Unit cooling capacity is reduced (normal)
Check for leakage and correctly recharge
refrigerant.
Poor heating effect.
●
Outdoor temperature is lower than 7°C.
●
Doors and windows are not completely closed.
●
Leakage of refrigerant or lack of refrigerant.
●
Use heating devices.
●
Close doors and windows.
●
Check for leakage and correctly recharge
refrigerant.
Table 7-2
Symptom
Troubleshooting
Solution
The fan speed cannot be changed.
Check whether the MODE indicated on the
display is "AUTO".
When the automatic mode is selected, the air
conditioner will automatically change its fan
speed.
Check whether the MODE indicated on the
display is "DRY".
When Dry mode is selected, the air conditioner
will automatically change its fan speed. When
dry operation is selected, the air conditioner
automatically changes the fan speed. Fan
speed can be selected in "COOL", “FAN
ONLY”, and “HEAT” modes
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 when the unit
is working in FAN mode.
The indication on the display disappears
after a lapse of time.
Check whether the timer has ended when
TIMER OFF is indicated on the display.
Air conditioner operation will stop when the
set time is reached.
The TIMER ON indicator goes off after a
lapse of time.
Check whether the timer starts when TIMER
ON is indicated on the display
When the set time is reached, the air
conditioner will automatically start and the
corresponding indicator will turn off.
The IDU does not produce a sound when the
ON/OFF button is pressed.
Check whether the signal transmitter of the
remote controller is properly pointing towards
the infrared signal receiver of the IDU when
the ON/OFF button is pressed.
Air conditioner operation will stop when the
set time is reached.
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