28 Troubleshooting and Maintenance Manual
2 General Troubleshooting
MS turns on but then the foreline pump shuts off
The MS will shut down both the foreline pump and the turbo pumps if the
system fails to pump down correctly. This is usually because of a large air leak
or the side plate has not sealed correctly. This feature helps prevent the
foreline pump from sucking air through the system, which can damage the
analyzer and the turbo pumps.
You must power cycle the MS to recover from this state.
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