Bosch TCA640 Series Repair Instruction page 36

4.4.4 Drainage valve
The drainage valve (B) connects the water inlet (A) to the brewing unit
and drains the system at the end of the brewing cycle.
4.4.4.1 Home position
When the gears are in the home position, the drainage valve is open.
The cam (E) of the actuator must then be in the illustrated position.
58300000120060_ARA_en_c.doc – 18.09.09
Warning!
Malfunction
The position of the actuator and therefore the cam (E)
is not specified permanently on the drive shaft.
The actuator may be in the wrong position. The
function sequence may malfunction.
When installing the gears, ensure that actuator is
in the correct position, as indicated under "Home
position"!
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