Table of Contents
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Summary
The most common problems with the DPS is the roughing pumps tripping off and causing a cascade of other faults. So the first thing to look for is what stage or stages are faulted, and what roughing pump is likely to blame.
There is some redundancy in the system, so depending on the type of fault, the system should be able to continue to operate well enough to keep the beamline valves open if a single stage fails, but you may not be able to operate any gas sources without the full DPS operational.
Check for your problem in the table below, then see full instructions below that for how to fix the issue.
Troubleshooting guide:
| Symptom | Potential Issue | What to do |
|---|---|---|
| Roughing pump tripped off | Radiation related fault | See - Restarting a roughing pump |
| Roughing pump won't start | Error message is present | Check "More..." status to see what error is listed |
In the case of pressure rise on gauges 3259 and 3291 due to a failure of one or more pumps in the DS-DPS system, this procedure should be used to isolate the beamline and stop the pressure from rising further. See the attached document for the full procedure.
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