We are having a problem with Jura F9 it say its malfaction 8

You can find some detail procedure in this tip below
http://www.fixya.com/support/r5713182-jura_capresso_impressa_f9_malfunction_8
Try it since it have help some other with same problem.

I have had this same problem numerous times, and I think somewhere on this forum someone had previously posted that it is usually coffee grounds that get stuck in the dumping process.

The way way I have fixed this is to pour hot water, little by little (1/4 to 1/2 cup at a time) through the "pre-ground" bean trap door, located on the top of the machine, and turning the machine off and on so it can attempt to clear the excess grounds causing this malfunction. Eventually the excess grounds will come out in a clump and the malfunction should clear. Be patient, I recall one time I had to do this for probably about 30 minutes, but also know that other times it will clear much after the first few attempts.