Bosch TCA640 Series Repair Instruction page 11

3.4.8 Cleaning button
When the red illuminated ring lights up around the
cleaning button clean, the appliance must be cleaned.
Coffee can still be brewed.
To start the cleaning cycle, press the clean button for
approx. 3 sec.
58300000120060_ARA_en_c.doc – 18.09.09
3.4.9 Descaling button
When the red illuminated ring lights up around the
descaling button calc, the appliance must be descaled.
Coffee can still be brewed.
To start the descaling cycle, press the calc button for
approx. 3 sec.
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