ignazthecat A new matter is the pump screams up to 12+ bar when the lever activated for about 12-15 seconds before H2O comes out of grouphead…even on profiles with 2.3 bar preinfusions programmed.
This is an odd behaviour that doesn’t logically correlate with any error I can think of? Usually this means there is something you may not have mentioned?
- Pump pressure controlled by pressure transducer and feedback, as soon as pump reads set pressure it will cut back, not stay there for 12 seconds
- Water not coming out of group = blockage (but see point 1?)
- Then water comes out, because of air in brew circuit = non return valve or top group valve leaking (so why 12 bar+), alternatively, blockage is intermittent (again see point 1)
- It works as programmed after the pressure surge (can’t think of a reason why it would do this)????
- It’s a new problem, is it related to the work you did (quite likely)
So work the problem, here’s the things I don’t know, and without knowing them, I can’t help, only sp;eculate.
- what exactly did you do, is the group assembled correctly
- what are the profile settings exactly
- does it do it with a straight 9 bar profile
- can you post a video with sound showing the problem, show the display and any gauges (don’t make it too short, it doesn’t cost anything
- what are the advanced PID settings for the pump, P I and D, plus pump acceleration (remind me of the construction year when you do as Cruzet, the maker of the mag drive unit for the pump made a change in the impulses required in later models, which means different PID settings are needed).
So far the only conclusion based on the information provided is the problem doesn’t make sense, so it must be a fault in the control board or pump that has coincidentally sprung up just as you finished the work. However, I really don’t like coincidences and the pump control units are bullet proof, the same with the control boards….so I think it’s extremely unlikely either have a problem.