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Troubleshooting
This unit has been designed using state-of-the-art manufacturing processes and it has been tested repeatedly to
ensure that it is working properly. However, should problems occur, refer to the following list.
Unplug the unit from the power supply before performing any work on it!
Problem Possible cause Check Remedy
The unit does not start or
switches itself off automati-
cally.
Power failure.
Are all other electrical compo-
nents working?
Check current and wait for the
device to start again.
Defective power fuse /
main switch is off.
Are all currents for lighting
functional?
Replace power fuse.
Switch on main switch.
Power supply line damaged.
Are all other electrical compo-
nents working?
Maintenance by authorised
personnel.
Temperature range is either
too high or too low.
Is the fan still working?
Keep the unit within operating
temperature range 20 to 35°C.
Water tank is full.
Is the “Tank Full” signal light lit
up?
Empty tank. See page 7.
The surrounding temperature is
outside of the operating range
(16 to 35 °C).
Does “E1“ appear on the dis-
play?
Do not operate the unit out-
side of the operating range.
The exhaust hose is bent, ex-
tended, facing downwards or
blocked.
Does the cooling performance
improve when the device is
operated without an exhaust
hose and without a filter?
Make sure that the exhaust
channel is not blocked.
Dirty filter
Input and/or output opening
blocked by foreign matter.
Are the filters dirty?
Does the cooling performance
improve when the device is
operated without a filter?
Clean filter and reinsert it into
the unit.
Minimum clearance is insuffi-
cient.
Has the minimum distance of
50 cm been maintained?
Maintain minimum distance.
Windows and doors open /
thermal load increased.
Has something been changed
in the design or application?
Close windows and doors /
reduce thermal load.
Low pressure in the setup
room when operating the unit.
Does the cooling performance
improve when a door or win-
dow is opened?
Correct pressure in the setup
room.
“Cooling” operating mode not
set.
Is the “AUTO, HI, MED or LO“
LED lit up in the display?
Set operation mode to “AUTO,
HI, MED or LO“.
Device is switched on with the
timer function.
Is the “AUTO, HI, MED, LO or
FAN“ LED lit up?
Press the I / 0 button again.
Temperature setting too high.
Is the temperature setting
higher than the temperature of
the room?
Lower temperature.
Excess voltage due to light-
ning.
Was there lightning recently in
the region?
Unplug the unit from power
supply with switch 5 and re-
start.
The unit does not to respond
to the infrared remote con-
trol.
Remote-control batteries are
dead or the transmission dis-
tance is too far.
Does the button function work
at a distance of approx. 1 m?
Replace batteries /
reduce distance or change lo-
cation.
Polarity of the batteries is in-
correct after replacement.
Is the polarity correct?
Insert the batteries correctly.
Pay attention to the labels.
Condensation water leaks
out of the device.
The device is not standing up-
right.
Is the device upright?
Place upright and make sure it
is firmly in place.
The plug for the condensation
drain is not inserted correctly
or is damaged.
Is water dripping out of the
condensation drain?
Insert the plug correctly or re-
place if necessary.
The unit is either not cooling
at all or only cooling a little
bit.
Should the unit still not be working despite these checks, please contact an authorised service centre.
11


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