Troubleshooting Siemens Fault 0A7991: A Comprehensive Guide
Step 1: Perform a Hard Reset
Sometimes, a logical glitch is all it takes.
To clear this alarm and enable the drive for normal operation, you must either complete the identification routine or manually deactivate it. Complete the Identification Routine:
- Re-enter motor nameplate data exactly.
- Perform motor ID (p1910 = 1).
- Ensure
p0340 = 3(recalculate motor model).
