en Troubleshooting16ATTENTION!Unsuitable cleaning products may damage the sur-faces of the appliance.▶ Never use unsuitable cleaning products.▶ Do not use cleaning products while the hob is stillhot. This may cause marks on the surface.Unsuitable cleaning products¡ Undiluted detergent¡ Detergent intended for dishwashers¡ Abrasive cleaning products¡ Aggressive cleaning products such as oven sprayor stain remover¡ Abrasive sponges¡ High-pressure or steam jet cleaners20.2 Cleaning the hobClean the hob after every use to stop cooking residuesfrom getting burnt on.Requirement: The hob must be cold. Do not allow thehob to cool down if it has sugar stains, rice starch,plastic or aluminium foil on it.1. Remove heavy soiling using a glass scraper.2. Clean the hob with a cleaning agent for glassceramic.Follow the cleaning instructions on the packaging ofthe cleaning agent.Tips¡ You can achieve good cleaning results using aspecial sponge for glass ceramic.¡ If you keep the base of the cookware clean, thehob surface remains in a good condition.20.3 Cleaning the hob surroundIf the hob frame is dirty or stained after use, clean this.Note: Do not use a glass scraper.1. Clean the hob frame with hot soapy water and a softcloth.Wash new sponge cloths thoroughly before use.2. Dry with a soft cloth.Troubleshooting21 TroubleshootingTroubleshoot-ingYou can rectify minor faults on your appliance yourself.Read the troubleshooting information before contactingafter-sales service. This will avoid unnecessary costs.WARNING ‒ Risk of injury!Improper repairs are dangerous.▶ Repairs to the appliance should only be carried outby trained specialist staff.▶ If the appliance is defective, call Customer Service.→ "Customer Service", Page 17WARNING ‒ Risk of electric shock!Improper repairs are dangerous.▶ Repairs to the appliance should only be carried outby trained specialist staff.▶ Only use genuine spare parts when repairing theappliance.▶ If the power cord or the appliance power cable ofthis appliance is damaged, it must be replaced witha special power cord or special appliance powercable, which is available from the manufacturer orits Customer Service.21.1 WarningsNotes¡ If appears in the displays, press and hold thesensor for the respective cooking zone and read thefault code.¡ If the fault code is not listed in the table, disconnectthe hob from the power supply and wait 30 secondsbefore reconnecting it. If this display appears again,contact the technical after-sales service and specifythe exact fault code.¡ If an error occurs, the appliance does not switch tostandby mode.¡ In order to protect the appliance's electronic partsfrom overheating or surge currents, the hob maytemporarily reduce the power level.21.2 Information on the display panelFault Cause and troubleshootingNo displays light up. The power supply has been disconnected.▶ Use other electrical appliances to check whether there has been a power failure.The appliance has not been connected as shown in the circuit diagram.▶ Connect the appliance in accordance with the circuit diagram.Electronics fault▶ If you are unable to rectify the fault, inform the technical after-sales service.The displays flash. The control panel is wet or an object is covering it.▶ Dry the control panel or remove the object.