The water softener filter has been used up.
Follow the instructions in this step-by-step guide:
The message "Confirm?" appears on the display.
“HOT WATER Confirm?” appears on the display
The coffee machine begins hot water delivery and the message "Please wait..." appears on the display.
After the flow of hot water stops the coffee machine automatically resets to "Ready for coffee" status. The new filter is now active and ready for use.