Siemens Drive Fault Code 7902 Extra Quality May 2026

The Siemens drive fault code 7902 (often displayed as F07902) indicates a "Motor Stalled" condition. This occurs when the drive detects that the actual motor speed has deviated from the set speed for longer than a specified delay time.  Core Causes 

Decouple the motor from the load to see if the fault persists. If it runs fine while decoupled, the issue is likely the mechanical load or an unreleased brake. Enable Flying Restart: siemens drive fault code 7902

According to Siemens Support, you should follow these steps to resolve the fault: The Siemens drive fault code 7902 (often displayed

) are too low for the application, preventing sufficient torque. Recommended Solutions Faulty encoder (incremental or absolute) on the motor

• Faulty encoder (incremental or absolute) on the motor (damaged cable, connector pins, water ingress, bent shaft).
• Loose, damaged, or incorrectly wired encoder cable or connector (broken shield, intermittent contact).
• Incorrect encoder type or parameter settings in the drive (mismatched pulses/revolution, wrong encoder mode).
• Excessive electrical noise on the encoder wiring (EMI from nearby power cables, lack of shielding or grounding).
• Drive firmware or parameter corruption after update or power loss.
• Fault in the drive’s encoder interface hardware (failed input stage) or a motor/internal wiring fault.
• Mechanical issues causing encoder disk slip or lost reference mark.