Cause: FIRMWARE ERROR comes when a critical problem with the drive's internal firmware. This is a serious fault that usually means the core software that controls the drive's operation has encountered an issue.

FERR FIRMWARE ERROR fault in Parker AC890 drive indicates a critical internal firmware failure. This is not an application-level issue, but rather a fault in the drive's embedded control firmware, which is responsible for the core operation of the AC890.

Troubleshooting Steps:

• Power Cycle: The first and simplest step is to completely power down the drive, wait a few minutes, and then power it back up.
• Check for Recent Events: Consider if there were any recent power outages, surges, or other electrical disturbances that might have occurred while the drive was operating or being powered down.
• Recent Update Attempt: If you recently attempted to update the drive's firmware and the process was interrupted or unsuccessful, this is a very likely cause of the error.
• Retry Firmware Update: If a firmware update failed, you will likely need to retry the update procedure