When the Siemens fault 0A7991 occurs, users may experience the following symptoms:
If you still see the fault, perform a using p0970 = 1 (factory reset) and repeat Phase 1. Corrupted non-volatile memory (NVRAM) is a silent cause of this fault. siemens fault 0a7991 best
Phase loss, incorrect motor wiring, or improper motor data (p03xx parameters) during commissioning. When the Siemens fault 0A7991 occurs, users may