What it means
The spiral-valve actuator pressure is above the expected condition due to regulator adjustment.
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
- Spiral-valve actuator pressure regulator misadjustment
Operator-safe first checks
- Record the message and compressor load/capacity state.
- Do not alter regulator settings without the machine-specific adjustment procedure.
Trained maintenance / service checks
- Check and set the pressure regulator for the spiral-valve actuator using the correct Sullair adjustment procedure.
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.