Go in as user type gt (password is micnt). If you go to inkjet operation, you should see the inkjet parameters.
The screen below is not complete and contains only a description of the PID.
The PID regulates the meniscus vacuum and the parameters depend on the software version. Currently a value of P=1, I=1, and D=3 is what it takes. This value is delivered on a sheet that comes with every head.
Or better make a soft stop just 2 seconds (if it is 0 it is forever or until you press the green button above)