15Water filterOperation with or without a waterfilterYou can use the appliance with or without a waterfilter.If the water hardness exceeds 7°dH or carbonatehardness 5°dH, we recommend the installation of thedescaling system GF 111 100.Changing the water filterFilter cartridges should be replaced regularly.Replacement cartridges are available from after-salesservice or in the online shop (order numberGF 121 110).The capacity of the filter cartridge depends on thefrequency of use of the appliance and your regionalwater hardness. A message will appear in the displayto remind you when the filter needs to be replaced.Regardless of the actual amount of water filtered thefilter cartridge needs to be changed after 12 monthsat the latest.1 Set the function selector to S. Select "Water filterchange" using the rotary selector.2 The œ symbol is displayed. Confirm with ™.3 Change the water filter cartridge. Refer to theinstructions included with the filter cartridge.Confirm with ™.4 "Water filter capacity” is shown in the display.Confirm with ™.5 Turn the rotary selector to select the capacity ofthe filter cartridge (between 100 - 9000 litres).Confirm with ™.The water filter change is complete. Confirm with ™.The appliance is now ready for operation.Activating the applianceStandbyThe appliance goes into standby mode if no functionhas been set or the child lock is activated.The brightness of the control panel is dimmed instandby mode.Notes‒ Different displays are available for standby mode.The default setting is the GAGGENAU logo andthe clock. To change the display, refer to the Basicsettings section.‒ The brightness of the display depends on thevertical viewing angle. You can adjust the displayusing the "Brightness" setting in the basicsettings.Activating the applianceTo exit standby mode, you can either:▯ turn the function selector,▯ touch a control panel,▯ or open or close the door.You can now set the required function. Please refer tothe corresponding sections for information on how toset functions.Notes‒ If no settings are implemented for a long periodof time after activation, the standby screen willreappear.‒ When the door is open, the interior lighting goesout after a short time.