The detergent cartridge for compartment 1 (TwinDos Whites) or the detergent cartridge for compartment 2 (TwinDos Colours) is empty.
Prepare the new cartridge:
Remove the cover cap from the cartridge.
or
Remove the film seal from the cartridge completely.
Replace the detergent cartridge:
Switch on the washing machine.
To release the lock, press the yellow button above the cartridge (1).
Pull out the detergent cartridge (2).
Insert a new cartridge.
Touch the flashing sensor control
The counter is set to 0.