Underload fault

What does F029 mean?

This fault is detected when the motor current drops below the Application Underload threshold (211) for a duration longer than the Application underload time delay (210). This condition indicates that the motor is running with insufficient load, and detection is active only during steady-state operation.

• Motor current undershoots the Application Underload threshold (211).
• The application underload condition persists longer than the Application underload time delay (210).
• Loss of mechanical load on the motor (e.g., broken belt, dry pump, material shortage in a conveyor).
• Application Underload threshold (211) is set too high, or Application underload time delay (210) is set too short for the application.

Click steps to track your progress.

1. 1

   Verify the actual motor current during operation and compare it to the Application Underload threshold (211).

2. 2

   Inspect the mechanical system for any issues causing a loss of load, such as broken couplings, empty feeders, or fluid loss in pumping applications.

3. 3

   Adjust the Application Underload threshold (211) (20% to 100% of 305 parameter) and Application underload time delay (210) (0 to 100s) to suit the application's normal operating conditions, if current settings are too sensitive.

4. 4

   Ensure that underload detection is configured correctly, noting that a value of 0 for parameter 210 disables this feature.