Inverter Overload

What does OL2 mean?

This fault indicates the inverter itself is experiencing an overload condition, likely due to excessive output current over time. It triggers a shutdown to protect the inverter's power components (IGBTs, rectifiers) from damage. Persistent inverter overload can lead to component failure, overheating, and reduced lifespan of the drive.

Complete Troubleshooting Guide

1. 1

   Reduce the load on the motor to ensure the inverter's output current remains within its rated limits.

2. 2

   Verify that the motor and application are correctly sized for the inverter's continuous current rating.

3. 3

   Check the inverter's cooling system (fans, heatsinks) for proper operation and blockages.

4. 4

   Increase acceleration/deceleration times to reduce peak current demands during transients.

5. 5

   Measure the actual output current and compare it to the inverter's rated current and OL2 detection settings.