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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 - |
| 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 | Radiation related fault | See - Resetting a turbopump fault |
| US4 stage cannot be restarted | Probably radiation damage | See - Pump redundancy |
| Foreline valve won't open | Foreline interlocks need to be cleared | Reset foreline inerlocks from "Foreline Vlv Intlks..." panel |
Resetting a roughing pump fault
This may be indicated by one or more of the following:
- The roughing pump is stopped (red) or disconnected (purple), or
- The foreline vacuum gauge is reading a value >1 Tor, or
- A warning or alarm is present in the "More..." panel of the roughing pump panel, or
- Something else that I have not though of.
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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