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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. See the "Pump redundancy" section for more info.
Overview of Operation and Troubleshooting of the the DPS
dstorey_2022-11-3 - DPS Operations and Troubleshooting Summary.pdf
Troubleshooting guide:
Check for your problem in the table below, then see full instructions below that for how to fix the issue.
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| Symptom | Potential Issue | What to do |
|---|---|---|
| Roughing pump tripped off | Radiation related fault | See - Resetting a roughing pump fault |
| Roughing pump won't start | Error message is present | Check "More..." status to see what error is listed. |
| Roughing pump won't reset an error | There is a real problem, or pump has been damaged | See - Resetting a roughing pump fault |
Turbopump tripped off | Most likely related to loss of backing pressure | Fix the problem with the roughing pump/foreline configuration then restart the turbo as described in Restarting DPS pumps. |
| Radiation related fault | See - Resetting a turbopump fault | |
| Roughing pump or turbo not responsive | Pump is in local mode, not remote | Put pump into remote mode. See Setting pumps to remote mode |
| US4 stage cannot be restarted | Probably radiation damage | See - Pump redundancy |
| Foreline valve won't open | Foreline interlocks need to be cleared | Reset foreline interlocks from "Foreline Vlv Intlks..." panel |
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