F1000 fault in siemens sinamics V90 drive indicates an Internal Software Error. This means the drive’s firmware has encountered an unexpected condition or crash, requiring a reboot or firmware update to recover.
Cause:
An internal software error has occurred.
Remedy:
- Evaluate fault buffer.
- Carry out a POWER ON (power off/on) for all components.
- Upgrade firmware to later version.
- Contact the Hotline.
- Replace the Control Unit.
