Siemens Drive Fault Code 7902 Jun 2026

(e.g., G120, G120XA, S120)?

If using encoder feedback, verify the encoder signal is accurate.

| Parameter | Description | Expected value | |-----------|-------------|----------------| | | Motor temperature (actual) | In °C. If showing -99°C or >250°C, sensor fault is likely. | | p0600 | Temperature sensor type | 0 = none, 1 = KTY84, 2 = PTC, 3 = PT100 | | p0601 | Sensor connection method | 0 = via terminal, 1 = via TM120 module | | p0604 | Overtemperature threshold | Typically 130-160°C for KTY, 90-130°C for PT100 | | p0610 | Motor overtemperature response | Defines reaction (reduce current, trip, etc.) | siemens drive fault code 7902

A "Motor Data Identification" (MotID) or static optimization run was not completed correctly during commissioning. Ramp Settings: The acceleration ramp ( cap P 1120

The actual motor speed has exceeded the p2162 (overspeed threshold) value for longer than the time set in p2163 . If showing -99°C or >250°C, sensor fault is likely

Measure the resistance of the motor windings using a multimeter to ensure balance across all three phases.

: The default delay time for stall detection is too short for high-inertia loads. siemens drive fault 7902 - Click2Electro Measure the resistance of the motor windings using

) is too short, leading to starting before the field is established. Recommended Troubleshooting Steps

Alternatively, increase the interval limit in if your operational schedule allows for longer intervals between servicing.

Check fault buffer. Often, overcurrent causes rapid heating, which then triggers 7902. Fix the overcurrent first.

If you are staring at a panel displaying “F07902” or “Fault 7902,” you know production has stopped. This article provides a deep dive into what this fault means, why it occurs, and—most importantly—a step-by-step guide to getting your machinery back online.