N30804 alarm in siemens 6RA80 DC Drive indicate CRC error. This means a CRC error has occurred for the power unit.

A CRC (Cyclic Redundancy Check) fault in a Siemens 6RA80 drive indicates an error in the data transmission or reception process. This can occur due to various factors, such as noise, interference, or hardware issues.

1. Carry out a POWER ON (power off/on) for all components.
2. Upgrade firmware to later version.