29Defrosting en= DefrostingDefrosting Freezer compartmentThe fully automatic NoFrost system ensures thatthe freezer compartment remains free of ice. Defrostingis no longer required.D CleaningCleaningCaution!Avoid damaging the appliance and the fittings.– Do not use abrasive, chloride or acidic cleaningagents or solvents.– Do not use scouring or abrasive sponges.The metallic surfaces may corrode.– Never clean the shelves or containersin the dishwasher.The parts may become deformed.Proceed as follows:1 Switch off the appliance.2 Pull out the mains plug or switch off the fuse.3 Take out the food and store in a cool location.If present: place ice pack on the food.4 If present: wait until the layer of frost has thawed.5 Clean the appliance with a soft cloth, lukewarmwater and a little pH-neutral washing-up liquid.Caution!The rinsing water must not run into the light orthrough the drainage hole into the evaporation area.6 Wipe door seal with clear water and dry thoroughlywith a cloth.7 Reconnect and switch on appliance and put in food.Cleaning the equipmentTo clean, take the variable parts out of the appliance.~ "Interior fittings" on page 24> NoisesNoiseNormal noisesDroning: A motor is running, e.g. refrigerating unit, fan.Bubbling, buzzing or gurgling: Refrigerant is flowingthrough the tubes.Clicking: Motor, switches or solenoid valves areswitching on and off.Cracking: Automatic thawing successful.Preventing noisesAppliance is not level: Align appliance using a spiritlevel. If required, place a little packing underneath.Containers, shelves or storage compartments wobbleor stick: Check the removable fittings and re-insert ifrequired.