What it means
A monitored package pressure channel is above its configured high-pressure limit.
This entry is tied to the exact STS message family documented by Sullair. The same words can mean something different on another controller generation, so confirm the displayed message and machine documentation before acting.
Likely causes
- Actual package pressure is too high
- Pressure-sensor fault
Operator-safe first checks
- Record the exact channel/message and pressure value.
- Do not defeat high-pressure protection or repeatedly reset the fault.
Trained maintenance / service checks
- Check operation of pressure-control valves and associated controls.
- Verify the relevant pressure sensor against an independent measurement and replace only if confirmed defective.
Reset or keep running?
Do not use repeated resets as a substitute for diagnosis. If the condition involves electrical power, a motor overload, high pressure, loss of cooling, abnormal temperature, or a safety circuit, correct the underlying problem before returning the compressor to service.
Source confidence
OEM VERIFIED
This message and its troubleshooting direction are traced to the Sullair STS controller troubleshooting guide.
Source: Sullair STS Controller User Manual, part 02250241-178 R01. Referenced manual page: 31.