Bosch TCA640 Series Repair Instruction page 67

7.1.3 Grinding unit
Complaint
Coffee beans are not ground
Noise of grinding unit is
quieter and higher
Noise of grinding unit is loud
Grinding unit is not
functioning
Grinding unit starts as soon
as appliance is switched on
58300000120060_ARA_en_c.doc – 18.09.09
Cause?
►
Grinding unit has not been adequately filled with
coffee
►
Coffee beans are too oily and stick to the wall of
the bean container
►
Coffee beans do not fall into the grinding unit
►
Bean container is empty
►
Coffee beans do not fall into the grinding unit, are
too oily and stick to the wall of the bean container
►
Foreign object in grinding unit (e.g. grit, may also
occur with select coffees)
►
Ground coffee has been selected
►
Power module not actuated by the logic module
►
Grinding unit not actuated by the power module
►
Grinding unit motor defective
►
Optocoupler on power module defective
Remedial action
►
Press coffee dispensing button again to start
another brewing process
►
Empty and clean bean container. Use beans
with lower fat content
►
Fill bean container
►
Empty and clean bean container. Use beans
with lower fat content
►
Replace grinding unit
►
Press coffee dispensing button again to start
another brewing process
►
Check actuation; to do this, press the coffee
dispensing button
process. If required, replace logic module
►
Check actuation; to do this, press the coffee
dispensing button
process. If required, replace power module
►
Replace grinding unit
►
Replace power module
to start a brewing
to start a brewing
Seite 67 von 95