Power unit: Unknown alarm

What does A30999 mean?

This alarm indicates that an event occurred on the power unit which the Control Unit firmware cannot interpret. This typically happens when the power unit has newer firmware than the Control Unit, leading to unrecognized alarm codes. While not immediately critical, it signifies a firmware version mismatch that can obscure actual issues. The risk is that critical alarms might go uninterpreted, leading to delayed troubleshooting or missed underlying problems with the drive.