The coffee machine has been set up incorrectly.
Set the quantity of coffee, espresso or hot water dispensed in the portion size programming settings.
You will find the description of the portion size programming in your operating instructions.
The quantity of coffee/espresso/hot water dispensed is too little or too much.
Set the quantity of coffee, espresso or hot water dispensed in the portion size programming settings.
You will find the description of the portion size programming in your operating instructions.
Descale the coffee machine.
Refer to the operating instructions for the descaling procedure.