Cause : Motor stalled comes when the drive detects that the motor is not rotating as expected based on the commanded speed and the motor model within the drive. The drive has detected that the motor is stalled — meaning it’s energized but not rotating (or rotating way too slowly compared to what it should be).

f7902 fault in g120 indicates motor stalled condition. This means the drive is trying to spin the motor, but it senses that it's stuck or moving way too slowly.

Troubleshooting Steps:

Follow these steps to correct f7902 fault in g120:

• Check for Mechanical Obstructions: Ensure the motor and the driven equipment are free from any mechanical jams, blockages, or excessive loads. Try to rotate the motor shaft manually (with the power off) to check for free movement.
• Verify Motor Parameters: Double-check that all motor parameters in the drive exactly match the motor's nameplate data.
• Perform Motor Data Identification/Static Optimization: For asynchronous motors, run the static optimization routine and then calculate the motor parameters .
• Activate Flying Restart (if applicable): If you are using an asynchronous motor and need to restart a still-rotating motor, ensure the flying restart function is enabled.
• Increase Acceleration Time: A longer acceleration ramp will allow the motor more time to overcome inertia and reach the target speed without stalling.
• Check Torque Limits: Ensure the torque limits are appropriately set for the application's requirements. Avoid setting them too low.