– 5Illustration Release and remove the suction head. Put the disposal bag over. Tightly close the disposal bag with ca-ble tie underneath the opening. Remove disposal bag. Insert the new disposal bag. Pull disposal bag over the container.Make sure that the marking line is situ-ated within the container and both ven-tilation holes are positioned at the backof the container. Insert and lock the suction head. Release and remove the suction head. Clean the electrodes with a brush. Insert and lock the suction head. DANGERFirst pull out the plug from the mains beforecarrying out any tasks on the machine. Check the receptacle and the fuse ofthe power supply. Check the power cable, the power plug,the electrodes and possibly the recep-tacle of the device. Turn on the appliance. Empty the container. Turn off the appliance and wait for 5 sec-onds, turn it on again after 5 seconds. Clean the electrodes as well as thespace between the electrodes with abrush. Remove blockages in the suction noz-zle, suction tube, suction hose, or flatpleated filter. Replacing the full fleece filter bag. Replace the filled disposal bag Ensure the filter cover properly locksinto place. Replace the flat pleated filter. NT 50/1 only:Check drain pipe for leaks.Illustration Check/correct the correct positioning ofthe flat pleated filter. Replace the flat pleated filter. Clean the electrodes as well as thespace between the electrodes with abrush. Continuously check the filling level incase of non-conductive liquid. Suction hose is not connected. Inform Customer Service. Inform Customer Service.If malfunction can not be fixed, the de-vice must be checked by customer ser-vice.Replace the disposal bagCleaning the electrodesTroubleshootingSuction turbine does not runSuction turbine turns offSuction turbine does not start againafter the container has beenemptiedSuction capacity decreasesDust comes out while vacuumingAutomatic shut-off (wet vacuumcleaning) does not reactAutomatic filter cleaning is notworkingAutomatic filter cleaning cannot beswitched offAutomatic filter cleaning cannot beswitched onCustomer Service13EN