Paolo_Cortese
@BillyG
With the explanation from Paulo (I had been wondering at what pressure the timer switched over)
I would suggest you lower your preinfusion pressure to 4 bars even if you do not want to, but just to help fault find, or find if you have a fault or not
I’d suggest, and without seeing a video it’s difficult to understand your issue, that depending on your grind you are inadvertantly hitting the 6.8 bar and cancelling the preinfusion phase.
Even at 2 bars set point depending on grind I’ve seen it hit 2.6 bars on a “top up” which I’d suggest is just due to the great performance of the rotary pump and not a real world issue.
Maybe 6 bars is a little high for standard operation is what I’m suggesting regardless at what spec wording you are going to throw back at me.
Updated
I just reread your message and would suggest what I’m saying above is true, on a “top up” you are cancelling the preinfusion infusion when the higher pressure is hit. This is most probably not a fault but due to the grind size, and high set point you are using.
