There is an excessive amount of ground coffee added to the brew unit.
Switch the coffee machine off with the On/Off switch.
Wait 2 minutes before switching the coffee machine back on.
To make drinks using ready ground coffee, add a portion of ground coffee to the ground coffee chute. Only 1 portion of coffee or espresso can be made at a time when using ready ground coffee.
Some coffee machine models are supplied with a coffee scoop. Use the measuring spoon supplied so that the correct amount is dispensed.
CM 7xxx: When using the coffee scoop supplied:
Put exactly 2 level coffee scoops of ground coffee in the ground coffee chute of the coffee machine.
CM 6xxx, CVA xxxx: When using the coffee scoop supplied:
Put exactly 1 level coffee scoop of ground coffee in the ground coffee chute of the coffee machine.
CM 5xxx: Put exactly 12 g of ground coffee powder in the ground coffee chute of the coffee machine.