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Troubleshooting
10 TROUBLESHOOTING
10.1 Operating problems and possible causes
If one of the malfunctions described below is encountered, switch o the air conditioner, disconnect it from the mains
and contact an authorised technical service centre.
– The operation light flashes quickly (twice per second). It continues flashing even if the unit is switched o and
back on again.
– The remote control does not receive the signals correctly or the button does not work properly.
– The fuse, circuit breaker or another safety device trips frequently.
– Water or foreign materials enter the unit.
– There are water leaks from the indoor unit.
– Other malfunctions.
If the system does not work properly and has the above faults or other types of problems, proceed as follows to try and
find the causes.
Symptoms Causes Solution
The unit does not start
Power failure. Wait for the power to return.
The power supply switch is o. Switch on the appliance.
Blown fuse or faulty power switch. Replace.
Remote control batteries flat or other
remote control problem.
Change the batteries or check the remo-
te control.
Air circulates normally but
cooling is insucient
The temperature is not set correctly. Set the correct temperature.
Compressor protection with 3-minute
delay is active.
Wait.
The unit starts or stops
frequently
The amount of refrigerant is insucient
or excessive.
Check for leaks and top up the refrige-
rant.
Air or no gas in the refrigerant circuit.
Bleed the circuit and recharge the refri-
gerant
Compressor malfunction
Have the compressor repaired or repla-
ced.
Voltage too high or too low. Install a pressure switch.
System circuit blocked. Find the causes and fix them.
Limited cooling eect
The heat exchangers of the outdoor unit
and indoor unit are dirty.
Clean the heat exchanger.
The air filter is dirty Clean the air filter
Indoor/outdoor units’ inlet/outlet ob-
structed.
Remove all the residues to allow the air
to circulate freely.
Doors or windows open. Close doors and windows.
Direct exposure to sunlight.
Fit a curtain to reduce exposure to
sunlight.
Too many heat sources. Reduce the heat sources.
Outdoor air too high.
The cooling capacity of the air conditio-
ner has lowered (normal).
Refrigerant leaks or insucient amount
of refrigerant.
Check for leaks and top up the refrige-
rant.
Limited heating eect
The outdoor temperature is lower than
7 °C.
Use the heating function.
Doors and windows not completely
closed.
Close doors and windows.
Refrigerant leaks or insucient amount
of refrigerant.
Check for leaks and top up the refrige-
rant.
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