Siemens Drive Fault | Code 7902

: Incorrect motor phase lead connections or disconnected motor cables.

To effectively troubleshoot F7902 , you must understand four key parameters. These are the "knobs" Siemens engineers use to fine-tune the stall detection sensitivity. Modifying these parameters is often the fastest path to a solution. siemens drive fault code 7902

Primarily seen in SINAMICS S120 and G120/G120XA drives using Vector Control (VC) or Sensorless Vector Control (SLVC). : Incorrect motor phase lead connections or disconnected

To resolve F7902, users typically follow a structured diagnostic process: Validate Motor Parameters: Ensure parameters such as (rated voltage), (rated current), and (rated speed) exactly match the motor's physical nameplate. Perform Motor ID: Re-run the identification procedure using Modifying these parameters is often the fastest path

Fault 7902 ("Motor Stalled") means that the speed controller has reached its maximum capability, yet the actual speed of the motor does not match the setpoint. Essentially, the drive thinks the motor is "stalled" or blocked.

Inspect gearboxes, belts, and couplings for visible damage or misalignment. Step 2: Verify Motor Parameterization

The most effective approach to clearing the 7902 fault is re-commissioning. If your system is failing with F07902, follow these steps in order: 1. Perform a Factory Reset