Siemens Drive Fault Code 7902 Portable

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

To help tailor this guide to your exact setup, could you tell me:

Follow this structured matrix to diagnose and clear the 7902 fault code systematically.

Fault F7902 is triggered during a commissioning or tuning phase known as or Line Data Identification . During this sequence, the Siemens inverter injects specific current pulses into the motor stationary windings (or the incoming supply line) to calculate critical internal variables. These variables include stator resistance, leakage inductance, and rotor time constants. siemens drive fault code 7902

If the fault consistently happens during startup or at very low frequencies in sensorless vector control:

The above two conditions have simultaneously persisted longer than the stall delay time ( p2177p 2177 Primary Causes of Fault 7902

If the motor vibrates violently or makes a growling noise during startup before tripping F7902 , you likely have a phase loss. To resolve F7902, users typically follow a structured

what does this code mean? It means the the drive thinks the motor has stalled. Please see parameters p1744, p1755 and p2178. Siemens SiePortal SINAMICS G120XA fault F07902 - ID: 109773411 - Support

: Configures the warning threshold for overload/maintenance. p0650 : Displays the actual motor operating hours.

If the above points pass but the fault persists, suspect drive hardware: During this sequence, the Siemens inverter injects specific

The specifically indicates a "Drive: Motor Stalled" condition. It triggers when the drive detects that the motor shaft has stopped spinning or cannot keep up with the commanded speed while operating above its baseline speed threshold.

The root causes generally fall into four primary categories:

If the parameters are flawless, the issue is likely a physical barrier preventing the identification current from flowing evenly across all three phases.