Drive Overload
Allen-Bradley · PowerFlex 520-series Adjustable Frequency AC Drive
What does F064 mean?
This fault indicates that the drive's internal thermal model has detected a prolonged current draw exceeding its rated capacity, typically occurring under high load conditions. Continuous operation in an overload state will reduce the lifespan of the drive, generate excessive heat, and potentially damage internal components. This often signals that the drive is undersized for the application or there's an issue with the mechanical system.
Complete Troubleshooting Guide
- 1
Increase A584 [PM Stable 2 Kp] by 100 for each trial if the fault is experienced at high load, especially during open loop tuning for sPM motors.
- 2
Verify the motor and drive are correctly sized for the application's continuous and peak load requirements.
- 3
Check for mechanical issues in the driven equipment (e.g., worn bearings, misalignment, excessive friction) that could be causing excessive load on the motor.
- 4
Monitor the motor's actual current draw against its rated current to confirm overload conditions and evaluate the average and peak loads.