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#56657
Beobuddy
FOUNDER Member

It’s probably most obvious that the BS9000 looses the information about the position of the sledge. It stresses and goes into standby for a restart routine. During that starting routine the sledge moves back to the first position ignoring a possible defective or dirty tacho sensor at the big motor, which moves the sledges.
They aren’t any things a user can do. It has to be opened for further cleaning/replacement which has to be done. But I have to say that the culprit can be on both sensor(s) around the motor or inside the sledge.
The servicemode (sometimes) can tell you more about errors. So, that’s the first thing to explore.