Jura J5 Reinigung mit Tablette das ganze Wasser liegt in Auffangschalle Problem Lösung Fehler

When rinsing and making coffee, the brewing group is at the very bottom and everything works normally. However, during the cleaning program, it lowers completely and then shortly afterwards moves up 2 cm. This means that the lower piston is not connected to the drainage valve, and the water flows freely out the bottom. While the cleaning program was running, I loosened the motor and screwed the brewing group all the way down, and lo and behold, the water flowed out of the coffee spout. Unfortunately, it doesn't stay that way. When I restart the cleaning program, the brewing group moves all the way down and then up 2 cm. I reset the machine to the factory settings. Then I screwed the brewing group in half and recalibrated the machine. Unfortunately, there was no improvement. Otherwise, the machine runs normally. When making coffee, there is very little water in the drip tray, so the drainage valve is fine. The problem lies in the incorrect assembly of the lower piston, but see for yourself.