Troubleshooting
DANGER
First pull out the plug from the mains before
carrying out any tasks on the machine.
Suction turbine does not run
Check the receptacle and the fuse of
the power supply.
Check power cable, mains plug and
mechanical overflow protection.
Turn on the appliance.
Vacuum turbine is running but the
machine is not sucking in dust/dirt
Turn off the appliance and wait for 5
seconds, turn it on again after 5 sec-
onds.
Loosen and clean the jammed float us-
ing a damp cloth. Check float for ease of
movement.
– Float is blocking the suction canal.
Empty the container.
Suction capacity decreases
Remove choking of suction nozzle, suc-
tion tube, suction hose, or cartridge fil-
ter.
NT 50/1, NT 50/2 only:
Exchange the fleece filter bag (option).
Clean or replace the membrane filter
(special accessory) under running wa-
ter.
Change cartridge filter.
NT 70/2, NT 90/2 only:
Check drain pipe for leaks.
Dust comes out while vacuuming
Check the proper installation of the car-
tridge filter.
Change cartridge filter.
Water leak during vacuuming
Loosen and clean the jammed float us-
ing a damp cloth. Check float for ease of
movement.
14
Customer Service
If malfunction can not be fixed, the de-
vice must be checked by customer ser-
vice.
The warranty terms published by the rele-
vant sales company are applicable in each
country. We will repair potential failures of
your appliance within the warranty period
free of charge, provided that such failure is
caused by faulty material or defects in man-
ufacturing. In the event of a warranty claim
please contact your dealer or the nearest
authorized Customer Service centre.
Please submit the proof of purchase.
Accessories and Spare Parts
– Only use accessories and spare parts
which have been approved by the man-
ufacturer. The exclusive use of original
accessories and original spare parts
ensures that the appliance can be oper-
ated safely and trouble free.
– At the end of the operating instructions
you will find a selected list of spare parts
that are often required.
– For additional information about spare
parts, please go to the Service section
at www.kaercher.com.
– 4
EN
Warranty