Bosch CTL9 Series Instructions For Use Manual page 64

en Troubleshooting
Fault
Coffee or milk froth
quality varies widely.
Milk froth quality var-
ies widely.
Coffee is not dis-
pensed or has slowed
to a trickle.
Set quantity is not
reached.
Coffee has no crema.
Coffee is too acidic.
Coffee is too bitter.
Coffee tastes burnt.
64
Cause and troubleshooting
Build-up of limescale in the appliance.
▶ Descale the appliance.
Milk froth quality depends on the type of milk or plant-
based alternative used.
▶ Optimise the result through the selection of the milk
or vegetable-based drink type.
Grinding level is set too fine.
▶ Set a coarser grinding level.
Heavy build-up of limescale in the appliance.
Descale the appliance.
▶
Air is in the water filter.
Immerse the water filter in water with the opening
1.
facing upwards until no more air bubbles escape.
Reinsert the filter.
2.
Appliance is soiled.
▶ Clean the brewing unit.
▶ Descale and clean the appliance.
Type of coffee is not optimal.
▶ Use a coffee variety with a higher proportion of Ro-
busta beans.
▶ Use beans with a darker roast.
Coffee beans are no longer freshly roasted.
▶ Use fresh coffee beans.
Grinding level is not appropriate for coffee beans.
▶ Adjust the grinder to a finer setting.
Grinding level is set too coarse.
▶ Adjust the grinder to a finer setting.
Type of coffee is not optimal.
▶ Use a coffee variety with a higher proportion of Ro-
busta beans.
Use beans with a darker roast.
▶
Grinding level is set too fine.
Set a coarser grinding level.
▶
Type of coffee is not optimal.
▶ Change the coffee variety.
Grinding level is set too fine.
▶ Set a coarser grinding level.
Type of coffee is not optimal.