Very many thanks pollyp for a very detailed step by step instructio and illustration.
I have sorted it out. Before opening I have noticed the liner did have crews. When opened the pump noticed its not original abd the connecotr simply taped. Removed and connected properly and it works. Apparently the tappe was broken and connection was lost.
Regards.
PS: the app is not working on nexus mobile today can some confirm it please?
