Motor Overload

What does -OLF mean?

This fault indicates that the connected motor has experienced a prolonged overload condition, causing its estimated thermal state to exceed safe limits (118% as per page 75). This protects the motor windings from overheating and damage. It could be due to incorrect thermal protection settings or an undersized motor for the application, leading to premature motor failure.

Complete Troubleshooting Guide

1. 1

   Verify that the motor's thermal protection setting (ItH parameter) in the drive controller is correctly configured for the motor's nominal current and thermal class.

2. 2

   Inspect the mechanical load on the motor and reduce it if it consistently exceeds the motor's capabilities. Check for mechanical binding or issues that increase load.

3. 3

   Allow the motor to cool down completely before attempting to reset the fault and restart operation. Re-evaluate if the motor itself is undersized for the application's continuous load requirements.