14 EN7 TroubleshootingThis chapter summarizes the most common problems you could encounter with theappliance. If you are unable to solve the problem with the information below, contactthe Consumer Care Center in your country.Problem Possible solutionThe appliancedoes not work eventhough it is pluggedin.• The filter replacement light has been flashing but youhave not replaced the NanoProtect filter, and the applianceis now locked. In this case, replace the filter and reset thefilter lifetime counter.• The water refill light flashes. Make sure the water tankis properly installed and there is enough water in the watertank.The appliancedoes not work eventhough it is switchedon.The appliance is working but the buttons are not responsive.Check if the child lock is on.There are somewhite deposits onthe NanoCloudrotary humidificationwick.The white deposits are called scale and they consist ofminerals from the water. Scale on the NanoCloud rotaryhumidification wick affects the humidifying performance,however it does not harm your health. Follow the cleaninginstructions in the user manual.No air comes out ofthe air outlet. Plug the appliance into the power supply and switch on.The airflow thatcomes out of the airoutlet is significantlyweaker than before.• The pre-filter is dirty. Clean the pre-filter (see the chapter"Cleaning").• Make sure that you have removed all packaging material ofthe NanoProtect filter.