A.) Is the Internal Vacuum Chamber (IVC) good and at a pressure below 10-6 Torr
spikes above 10-5 Torr for a few seconds ONLY during filling are OK, but if it takes longer than a few minutes to come back down to 10-6 Torr, then call the Target Expert.
B.) Is the Liquefier producing normally without any alarms (RED lights indicating alarms on the QT screen) and are the cold head compressors all running (green lights).
The following screenshot shows the QT system under normal working conditions. The box in the top shows the overview