Old Hand Fault Finder

Siemens SINAMICS G120 F07801: Drive: Motor overcurrent

What it means The permissible motor limit current was exceeded.

✓ Checked against the manual (Oct 2026): meaning and actions match the official fault table. Manual page.

Likely causes

  • Current limit set too low
  • Up ramp too short or load too high
  • Short or ground fault in the motor cable
  • Motor data not matching

Checks, in order

  1. Check the current limit (p0640)
  2. Lengthen the up ramp (p1120) or reduce load
  3. Check motor and cables for short and ground fault
  4. Check star-delta and nameplate data

Source

Source (reworded, not copied): Siemens, SINAMICS G120 Control Units CU240B-2/CU240E-2 List Manual, 02/2023, A5E33839529, section 4.2 List of faults and alarms, PDF page 881. Official manual (PDF). Fault numbers and names can differ between firmware versions.