Siemens | Drive Fault Code 7902

In the context of Siemens SINAMICS drives (such as the G120 or S120), Fault Code F7902 signals that the motor has stalled

Missing Identification: Motor data identification and rotating measurements (static optimization) were not performed or completed.

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Elias’s radio crackled to life. It was the shift supervisor, Marcus, his voice tight with panic.

Need further assistance? Consult the official Siemens manual for your specific drive model (function diagrams 8010–8020 for output monitoring). For hands-on help, Siemens Technical Support can provide remote diagnostic assistance using Starter or STARTER software to trace current waveforms in real time. In the context of Siemens SINAMICS drives (such

: Re-run the motor data identification routine (often called "MotID") to ensure the drive accurately understands the electrical characteristics of the motor. Check Mechanical Load

• The drive trips and displays F07902 on the operator panel.
• The motor may feel hot to the touch (in genuine overtemperature cases).
• The fault may appear immediately at startup or after several hours of operation.
• In sensor-related cases, the fault may appear even when the motor is cold.
• Intermittent occurrence—especially during load cycles or ambient temperature changes.

The Siemens drive fault code F07902 indicates a "Motor Stalled" condition. This occurs when the drive detects that the motor speed is significantly below the expected setpoint while it is delivering maximum torque or current. Deep Technical Insight: Why it Occurs The drive trips and displays F07902 on the operator panel

: Limits for stall detection (such as speed or current thresholds) may be set too strictly for the specific application. Acceleration/Deceleration Rates