Overtorque Detection 1

What does oL3 mean?

This fault indicates that the drive's output current exceeded the level set in L6-02 for longer than the time specified in L6-03. This suggests a mechanical issue like a machine lock-up or that the load parameters are incorrectly configured. Leaving this unresolved can lead to continued machine stress, overheating, or damage to connected equipment.

• Mechanical jam or excessive friction in the driven equipment (e.g., conveyor, pump, fan impeller).
• Motor or drive is undersized for the peak torque requirements of the application.
• Rapid acceleration rate (e.g., C1-01) set too fast for the load's inertia.
• Incorrect overtorque detection level (L6-02) set too low, or overtorque detection time (L6-03) set too short.
• Worn bearings in the motor or gearbox increasing frictional load.

Click steps to track your progress.

1. 1

   1. Manually attempt to rotate the load mechanism to identify any mechanical binding or obstruction.

2. 2

   2. Monitor the drive's output current (e.g., display parameter U1-06) during operation and compare to motor nameplate rated current.

3. 3

   3. Increase parameter L6-02 (Overtorque Detection 1 Level) or L6-03 (Overtorque Detection 1 Time) in small increments if mechanical inspection yields no fault.

4. 4

   4. Verify acceleration time parameter C1-01 is appropriate for the load inertia; increase it if acceleration is too rapid.

5. 5

   5. Perform a load test without the motor connected to the mechanical system if possible, to isolate the motor/drive from the load.

6. 6

   6. Check motor parameters P1-01 through P1-08 for accuracy against the motor nameplate.