The brew unit drive was not in the home position when the brew unit was removed.
Initialise the brew unit drive as follows:
Insert the drip tray and grounds container into the coffee machine.
Close the coffee machine door.
Switch on the coffee machine.
Switch the coffee machine off.
Switch the coffee machine on again.
This will automatically initialise the brew unit drive and put it back into the start position. Noises can be heard when initialising the brew unit.
CVA 2xxx to CVA 6xxx:
CVA 7xxx and CM xxxx:
If necessary, push the coffee ejector of the brew unit into the correct position.
After initialisation, slide the brew unit into the coffee machine.