IG Plus Finding Power Stage Error Codes 

This video shows how to go to the STATEPS menu to determine the error codes for each power stage of a Fronius IG or IG Plus. They have the same menu system. If there is no code on the power stage it will show Last ---. The reason there is a 558 code is because I was using a IG Plus V control box and the inverter box was an IG Plus, and older model.