What it means
The package has detected a high-moisture condition in a configuration that monitors moisture removal.
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
- Moisture drain malfunction
- Drain interval too long
- Plugged drain strainer
- Insufficient oil flow to the absorber module from a restricted orifice/strainer
Operator-safe first checks
- Confirm that automatic drains are not visibly backed up or discharging abnormally.
- Record when the condition occurs and whether it follows heavy condensate load.
Trained maintenance / service checks
- Check drain wiring and operation.
- Adjust drain timing only to the documented package setting.
- Clean applicable strainers/orifices following the machine 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.