Hi

I have getting an issue on my KHD, Erro;titration takes too long, and shows 0.0 on the current value.
I have read and check Sam FAQ but I am not sure if I have found the cause.

1 I have check all the calibration of the pumps and the PH electrode.

2 When I open the top cover on the KHD I saw the both tubes too the internal pump were broken.( first time I opened the top cover)

3 I also remove the filter from the vent tube.

I made Sam measurements then I noticed that the internal pump did not go, is there someone who knows when the pump should go during the measurement procedure.
I suspect the pump is broken but wonder if ther are any more things I can do before I submit it for service 20ACA50E-5F2C-4D18-A615-F6738FCFE38F.jpg412CFFE2-257E-419A-B11A-E29C8568B9F7.jpg