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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 electrical installations
functioning correctly?
Check the voltage and if necessary
wait for it to come back on
Damaged mains cable
Are all electrical installations
functioning correctly?
Repair by specialist
Waiting time after switch-on too
short
Have approx. 5 minutes
elapsed since the restart?
Schedule longer waiting times
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&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 in 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
Doors and windows open.
Heating/cooling output increases
Have modifications been made to
the building?
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 ? 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 unit
Drainage pipe on collection
container clogged / damaged
Can the condensation drain off
without any obstruction?
Clean the drainage pipe and
collection container
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
REMKO ML
14
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