22
Faults
In case of malfunction, stop the operation of the air conditioner immediately, deactivate the unit and disconnect from the mains.
Switch off the automatic circuit breaker in the manifold and pull of the mains plug, if necessary.
Contact the after-sales service.
You can detect possibly impaired function by a reduced output, smoke development, unusual odours, loud noises, increased
tripping of the fuse or unusual heat development.
However, before you contact the after-sales service, please use the list below to check whether this could be a normal
occurrence or a fault you can remedy yourself.
Type of fault Possible causes
Device does not switch on immediately If the device is switched off and then on again immediately, a safety function
prevents it operating for about 3 minutes (compressor safety function).
The same thing happens when disconnecting the air conditioner from the mains
and then switching it on again. Again the safety function prevents the operation of
the device for approx. 3 minutes.
A delay of up to 17 minutes can occur before the heating function starts or warm air
begins to circulate, e.g. when the operating mode is changed or there is a power
cut when in heating mode.
Noises Noises caused by the flow of the refrigerant through the pipes can sometimes be
heard during operation. These noises tend to occur particularly during the first two
to three minutes after switching on or off.
Temperature fluctuations cause material expansion and contraction, which can also
produce noises.
Smells The air emitted by the indoor unit may carry various smells already present in the
room, e.g. cooking smells, tobacco, new furniture, etc.). Because the air-
conditioned air is emitted at a higher speed, the smells can be perceived as more
intensive.
Emission of steam or vapour Slight vapour formation may be visible at the device during cooling or
dehumidification. This is due to the sudden cooling of the existing room air by the
climatised air and is normally no longer perceivable after a few minutes.
Device is not working Is it connected to the mains power supply?
Has a fuse blown?
Have the operating limits been exceeded?
Has a power cut occurred?
Are the batteries in the remote control working?
The device switches off or on
unintentionally
The timer function may possibly be activated.
The command entered on the remote
control is not executed
Depending on the operating mode selected, impractical functions cannot be
executed.
Inadequate cooling or heating Do the air filters need cleaning?
Are the device
’
s inlet and outlet vents covered or clogged with dirt?
Have additional sources of heat been switched on? (during cooling mode)
Are the room temperature settings appropriate?
Are the windows and doors in the room to be cooled or heated open?
Has the correct fan speed been set (air volume)?
Are larger window surfaces present during cooling operation through which direct
sunlight enters the room?
You may need to close the curtains, lower the blinds, etc.
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