11
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.
G
Unplug the unit from the power supply before performing any work on it!
G
Problem
Possible cause
Check
Remedy
The device does not start
or switches itself off auto-
matically.
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 outside
of the operating range.
The device is either not
cooling at all or only
cooling a little bit.
The exhaust hose is bent, ex-
tended, place downwards or
blocked.
Does the cooling performance
improve when the device is op-
erated 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
Is the filter dirty?
Clean the filter
The unit is too close to the wall
or other objects.
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 FAN operating mode
set?
Switch unit operating mode
Device is switched on with the
timer function
Is the “TIMING ON“ LED lit up? Press the On / Off 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 device from the power
supply with switch 5 and restart
The unit does not to
respond to the infrared-
remote control.
Remote-controlled batteries
are dead or the transmission
distance is too far
Does the button function work
at a distance of approx. 3 m ?
Replace batteries /
reduced distance or change
location.
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 air flap is not opened wide
enough
Check the position of the air
flap.
Open the air flap as wide as
possible.
Should the unit still not be working despite these checks, please contact an authorised service centre.
Содержание MTK 260
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