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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

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

2. 4

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

3. 5

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