Hi, The LC is indicating a high pusher voltage fault 39 reset. When relaunched, it worked properly pumping vacuum for 48 hours approximately and then it displayed the same fault. The green light turns to red, the vacuum dropped and then it restarts pumping (green light) until it rushed the same level about 10-7 and then it stands repeating the same cycle. When we restart the LC it lasts pumping about two days and then the same fault reappears. It seems a problem related to vacuum.
We encountered the same problem more than a year ago and it was solved spontaniously
Did anyone encountered this problem and how to solve it?