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Troubleshooting and customer service
The equipment and components are manufactured using state-of-the-art production methods and tested several
times to verify their correct function. If malfunctions should occur, please check the functions as detailed in the
list below. Please inform your dealer if the unit is still not working correctly after all the functional checks have
been performed!
Fault Possible cause Checks Remedial measures
The unit does not start
or switches itself off
Power outage, undervoltage,
defective mains fuse / main circuit
breaker switched off
Are all other electrical installations
functioning correctly?
Check voltage,
possible wait until turned on
again.
Damaged mains cable Are all other electrical installations
functioning correctly? Repair by a certified service centre
Waiting time after switch-on too
short
Have approx. 5 minutes elapsed
since the restart? Plan for longer waiting period
Temperate outside operating
temperature range
Are the fans in the indoor unit
and outside component working
correctly?
Take into account the temperature
range for the indoor unit and
outside component
Overvoltages caused by thunder
storms Has there recently been lightning?
Switch off the mains protection
and switch it back on / have it
checked by a specialist
Fault in external condensation
pump
Did the pump shut down due to
a fault?
Check and if necessary clean the
pump
The unit does not respond
to the remote control
Transmission distance too far /
receiver affected by interference
Does the indoor unit beep when
pressing a button?
Reduce the distance to less than 6
m or change position
Defective remote control Is the unit running in manual
mode? Replace the remote control
Receiver or transmitter unit
exposed to excessive solar
radiation
Does it function correctly in the
shade?
Place the receiver & transmitter
unit in the shade
Electromagnetic fields are
interfering with transmission
Does it function when
switching off possible sources of
interference?
Signal is not transmitted
when interference sources are
operational
Button on remote control jammed /
two buttons pressed at same time
Does the “Send” symbol appear
on the display?
Release the button / only press
one button
Batteries in remote control are flat Have new batteries been inserted?
Is the display incomplete? Insert new batteries
The unit is running
but only provides
reduced cooling or heating
performance
Filter is unclean / air inlet / outlet
blocked by foreign items Have the filters been cleaned? Clean the filters
Windows and doors open.
Heating/cooling output increases
Have there been any
constructional /
application-related changes?
Close windows and doors / install
additional units
Neither cooling nor heating mode
has been set
Is the cooling/heating symbol
shown on the display?
Correct the settings for the unit
Fins on outdoor component
blocked by foreign items
Is the fan on the outdoor
component running
and are the fins unobstructed?
Check the fan or winter controller,
reduce the air resistance
Leaking refrigerant circuit Are there signs of frost on the fins
of the indoor unit? Repair by specialist
Condensation is leaking out
of the collection container
drainage pipe Blocked / damaged
Is unrestricted condensation
discharge ensured?
Cleaning of drain pipe and
collector reservoir.
Faulty external condensation
pump or float
Is the condensation tray full and
the pump running?
Call out a specialist to replace the
pump
Condensation has not drained
away and has collected in the
condensation pipe
Is there a steady fall on the
condensation pipe? Check there is
no blockage in the pipe.
The condensation pipe must have a
fall. If necessary, clean the pipe
Condensation does not drain off
Are the condensation pipes
unblocked and is there a steady
fall? Are the condensation pump
and float switch functioning
correctly?
The condensation pipe must have
a fall. If necessary, clean the pipe.
A faulty condensation pump and
float switch should be replaced.
Malfunction
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