Overtorque 2 Fault

What does OL4 mean?

This fault indicates that the motor load has exceeded the configured Overtorque 2 detection level (L6-05) for the set duration (L6-06). Similar to OL3 but using a secondary profile, it triggers based on L6-04 settings, causing the drive to shut down. This points to a mechanical obstruction, jamming, or excessive resistance in the driven equipment. If persistent, this can lead to motor and drive damage or mechanical failure of the connected machinery.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Monitor motor current and output torque using the drive's digital operator display to identify operational patterns leading to the fault.

2. 4

   Verify the motor is correctly sized for the application and is not operating at its design limits during normal conditions.

3. 5

   Check for issues in mechanical power transmission components like bearings or gears that could increase torque demand.