Fronius IG Plus inverter issue?

[k1rod]

Failure solved

Thanks Bruce for the advice. The problem didn't however turn out to be the breaker. The problem was that the installer (a year and 9 months ago) didn't fully tighten down the AC line connection inside the inverter. The AC terminal on the circuit board in the inverter had a high resistance connection to the AC grid line and burned up. The inverter now needs to be replaced. The repair tech said he had seen this happen several times.

[bcroe]

Thanks Bruce for the advice. The problem didn't however turn out to be the breaker. The problem was that the installer (a year and 9 months ago) didn't fully tighten down the AC line connection inside the inverter. The AC terminal on the circuit board in the inverter had a high resistance connection to the AC grid line and burned up. The inverter now needs to be replaced. The repair tech said he had seen this happen several times.

I think that could happen at any high current terminal. I've gotten into tightening them
periodically. Also I might run a check near the end of peak power on a long sunny day.
All wires are checked for excessive heat, esp close to terminals. A thermal non contact
meter gets used too. There is enough AC current to warm 4 gauge; but it had better not
be excessive. Perhaps the thermal cycles tend to work loose the connections. Bruce Roe

[SunEagle]

I think that could happen at any high current terminal. I've gotten into tightening them
periodically. Also I might run a check near the end of peak power on a long sunny day.
All wires are checked for excessive heat, esp close to terminals. A thermal non contact
meter gets used too. There is enough AC current to warm 4 gauge; but it had better not
be excessive. Perhaps the thermal cycles tend to work loose the connections. Bruce Roe

One of the best tools I have ever used for electrical PM work is the Infrared camera. It will spot a problem way before a loose connection burns up the wire.

[ronbot]

Thanks Bruce for the advice. The problem didn't however turn out to be the breaker. The problem was that the installer (a year and 9 months ago) didn't fully tighten down the AC line connection inside the inverter. The AC terminal on the circuit board in the inverter had a high resistance connection to the AC grid line and burned up. The inverter now needs to be replaced. The repair tech said he had seen this happen several times.

Any progress with getting this repaired?
(not sure why they said it would need to be replaced, versus repaired)