I have a newly installed Fronius Primo Inverter. Since day one the unit is constantly restarting itself, and throwing 306/307 error codes. The information I have indicates these are due to insufficient sunlight reaching the panels and is typical at sunrise/sunset. This happens 30 to 40 times a day. The unit makes loud clicking/clunking noises each time, which suggests to me something of a mechanical nature (e.g. relays, fuses) is physically happening inside.
I have raised the issue with the installer, and after several weeks they finally indicated a warranty issue and went back to Fronius for their action.
Fronius has now come back saying there is nothing physically wrong with the unit (not sure how they would know this as they haven’t done any inspection themselves), but they need to have the installer revisit to make some changes to the settings in the unit.
My concern now is my brand new unit (installed 6 weeks ago) has already undergone the equivalent of 10 times the normal tripping process, and therefore we are unlikely to realise the intended / expected design life.
Does anyone know what might be causing the clicking/clunking noise? It is significant as the wall on which the unit is mounted vibrates each time.
Do I have reason to be concerned about shortened unit life?
