Bosch TCA640 Series Repair Instruction page 69

7.1.5 Cleaning and descaling programme
Complaint
Cleaning programme does
not start
Cleaning programme stops
after addition of cleaning
tablet
Error message "Error 8" is in-
dicated
Descaling programme does
not start
Descaling programme runs
for too long
Descaling display does not
go out after descaling
58300000120060_ARA_en_c.doc – 18.09.09
Cause?
►
System too hot (message on display)
►
Ground coffee flap is not closed
►
No ground coffee duct flap or no magnet on
ground coffee duct flap
►
Reed switch for detecting the ground coffee duct
flap defective
►
Cleaning tablet added at wrong time. Cleaning
tablet is blocking brewing unit
►
System too hot (message on display)
►
Water filter inserted and active
►
Too much liquid in water tank
►
Request to empty trays is indicated. Descaling
programme interrupted
►
Descaling was ended prematurely
Remedial action
►
Cool down system by drawing hot water
►
Close ground coffee duct flap and press the
coffee dispensing button
►
Replace ground coffee duct flap with magnet
►
Replace reed switch
►
Remove and clean brewing unit, remove
cleaning tablet
►
If damaged, replace brewing module
►
Cool down system by drawing hot water
►
Remove water filter and change programming
►
Adjust water hardness
►
Observe 0.5 l mark on water tank
►
Empty trays, clean contacts and dry
►
Restart descaling and run from start to end
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