At my current job, we have tons of VFDs (Variable Frequency Drives) manufactured by ABB. We using them for various types of equipment. Recently we had found one that was unable to be turned on, and showed an "internal configuration fault". What a help that was haha!
This is what we found. (on the inverter section of the VFD).
No processing FYI
Nothing beats the smell of melting plastic in the morning.