FF06 Motor overspeed fault in lenze i550 drive

Fault Code FF06 in a Lenze i550 drive indicates a motor overspeed fault. This means the motor connected to the drive is spinning at a speed that exceeds its rated maximum speed.

Potential Causes

1. Drive Configuration Issues:
   • Incorrectly set maximum speed limit or frequency.
   • Solution: Verify and adjust drive parameters to match the motor's specifications.
2. Mechanical Problems:
   • Jamming or Binding: Obstructions in the mechanical system can cause the motor to accelerate beyond its rated speed.
   • Loose Coupling: A loose coupling between the motor and the driven load can lead to overspeed.
   • Solution: Check for mechanical obstructions, ensure proper alignment, and tighten couplings as needed.
3. Sensor Issues:
   • A faulty speed sensor or incorrect sensor calibration can provide inaccurate speed readings, leading to overspeed.
   • Solution: Verify the sensor's functionality, calibrate it if necessary, or replace it if faulty.
4. Drive Internal Components:
   • A fault within the drive's control circuitry or power electronics can cause the motor to accelerate uncontrollably.
   • Solution: This often requires professional inspection and repair or replacement of the faulty component.

Troubleshooting Steps

1. Check Drive Parameters:
   • Ensure the maximum speed limit and frequency are set correctly for the motor.
   • Verify that the motor's rated speed is not exceeded.
2. Inspect Mechanical System:
   • Check for any obstructions or binding in the mechanical system.
   • Ensure couplings are tight and properly aligned.
3. Verify Sensor Functionality:
   • Test the speed sensor to ensure it's providing accurate readings.
   • Calibrate the sensor if necessary.
4. Use Diagnostic Tools:
   • If possible, use the drive's built-in diagnostic tools to gather more information about the fault.
   • These tools might provide specific error codes or data that can help pinpoint the problem.