OLF

Motor Overload

Schneider Electric · Altivar Machine ATV320 Variable Speed Drive

What does OLF mean?

Indicates that the motor's thermal model in the drive has calculated an overload condition, suggesting the motor is operating too hot. This protection mechanism prevents motor winding damage due to excessive current over time. The fault typically clears after the motor has cooled down.

Complete Troubleshooting Guide

  1. 1

    Check the actual motor temperature using an infrared thermometer.

  2. 2

    Verify that the motor's rated current and thermal parameters in the drive match the motor nameplate.

  3. 3

    Inspect the motor for proper ventilation and ensure cooling fins are clean and unobstructed.

  4. 4

    Reduce the mechanical load on the motor or extend acceleration/deceleration times.

  5. 5

    Ensure the motor cooling fan is operating correctly.

Source: Schneider Electric Manual