Siemens Drive Fault Code 7902 | Authentic & Direct

Is the drive currently , or is it just showing a warning ?

If the motor was never commissioned with the drive, run a static identification (p1910 = 1) followed by a rotating measurement (p1960). This teaches the drive the exact electrical characteristics of the motor. Failure to do this is a primary cause of unexplained 7902 faults in sensorless vector control. siemens drive fault code 7902

This fault occurs when the drive detects that the motor is not rotating properly—or is rotating too slowly—despite being given a command to run. Is the drive currently , or is it just showing a warning

Unlike a standard overload alarm, which trips due to high current, 7902 indicates a mismatch between the commanded speed and the actual mechanical movement. The drive is effectively telling the controller: "I am sending energy to the motor to turn, but the shaft is not moving as expected." Failure to do this is a primary cause