What it means
Sump pressure has risen beyond the controller's acceptable condition.
This condition appears in the STS troubleshooting guide as a fault condition that requires the cause to be corrected rather than repeatedly reset.
Likely causes
- Sump pressure-control valve failure involving poppet, Sullicon, spiral, blowdown or pneumatic valve functions
- Faulty solenoid valve
- Pressure regulator fault or incorrect adjustment
- Minimum-pressure/check-valve problem on applicable lubricated compressors
Operator-safe first checks
- Record the displayed pressure and exact alarm text.
- Stop repeated restart attempts if the high-pressure condition returns.
- Keep clear of pressurized piping, separator vessel and relief devices.
Trained maintenance / service checks
- Inspect the applicable pressure-control valves and their adjustment.
- Check solenoid operation and wiring.
- Check the pressure regulator and, where applicable, the minimum-pressure/check valve.
Can the compressor keep running?
No. Treat a recurring high-sump-pressure fault as a stop-and-diagnose condition.
Source confidence
OEM VERIFIED
Sullair's troubleshooting table lists pressure-control valves, solenoids, regulator and minimum-pressure/check-valve causes.
Source: Sullair STS Controller User Manual, part 02250241-178 R01. Referenced manual page(s): 32.