The water back-flow counter needs to be reset if, on machines with partial or full demineralisation
cartridge, the accompanying symbol appears on the display.
Partial demineralisation cartridge
Replace the partial demineralisation cartridge.
Reset the water back-flow counter.
Full demineralisation cartridge
Have the resin of the full demineralisation cartridge replaced by an authorised service technician.
Reset the water back-flow counter.