Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual page 32

2
General Troubleshooting
MSD turns on but then the foreline pump shuts off
MSDs will shut down both the foreline pump and the high vacuum pump if the
system fails to pump down correctly. This is usually because of a large air leak:
either the sideplate has not sealed correctly or the vent valve is still open. This
feature helps prevent the foreline pump from sucking air through the system,
which can damage the analyzer and pump.
See
MSD to recover from this state.
Local control panel says "No server found"
• Disconnected LAN cable between MSD and the hub, or the hub and the PC
• PC is turned off
• Holding the No/Cancel key down for 5 seconds will bypass error and allow
32
"Pumpdown failure shutdown"
the user to look at the LCP.
on page 174. You must power cycle the
5975 Series MSD Troubleshooting and Maintenance Manual