What it means
The controller has disabled Ethernet after detecting an abnormal network condition.
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
- Excessive Ethernet traffic on the compressor LAN
Operator-safe first checks
- Note whether the compressor itself continues to operate normally.
- Record any recent network changes or newly connected devices.
Trained maintenance / service checks
- Review the compressor network topology.
- Use appropriate network segmentation/routing to reduce excessive LAN traffic as recommended by the OEM.
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.