Hello! I'm hoping someone on the list has experience with the 6304 code on the SB 5000TL-US-22 or similar vintage (2015) SMA inverter.
I was asked to troubleshoot an inverter that has developed a daily habit of throwing this error and stopping production. The production curves over the last several days show production in the AM that builds and then abruptly stops late AM./mid-day. It looks like a problem caused by AC voltage rise, but my multimeter readings at both the main breaker and on the circuit board of the inverter stayed below 258V even at peak production. My impression from the online SMA documentation is that this is a metering error internal to the inverter and is not fixable. SMA does not seem to want to deal with this legacy model through tech support channels. It might be time for a new inverter, but I wanted to canvas the folks on the list before I gave up on this older model. -- Matt Sherald PIMBY Energy, LLC 304-704-5943
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