Solved! Fronius STATE 303, STATE 304, STATE 325, STATE 326, STATE 327 & STATE 517 fault messages

Is your Fronius Galvo, Primo, Symo or ECO inverter showing a STATE code that is related to high temperatures? Depending on your inverter this could be a STATE 303, STATE 304, STATE 325, STATE 326, STATE 327 or STATE 517 fault code and is basically the inverter telling you that it's not working properly because it's getting too hot.

A lot of the times fault codes like this are shown due to issues with the internal fan on the Fronius inverters, well I say it's an internal fan however it is external to the inverter, but it's mounted on the back of the unit and requires the inverter to be pulled apart to get to it.

In this video we will look at how to check and clean the fans on the back of the Fronius inverter. Please be advised the information shown in this video is general information only, any work carried out on a solar inverter is potentially hazardous and should be performed by a licensed electrician.