What it means
The STS has detected a mismatch or error in the VSD configuration for the compressor package.
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
- Controller initialized incorrectly
- Incorrect VSD rating or configuration
Operator-safe first checks
- Record the compressor nameplate data and the exact message.
- Do not change VSD parameters by trial and error.
Trained maintenance / service checks
- Verify controller initialization against the machine nameplate.
- Confirm the installed drive is the correct rating for the compressor package.
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: 35.