I've had a number of people ask me over the years how to clear the error status on the Sunny Island inverters. This video helps explain and demonstrate how to detect and clear the error from the master Sunny Island. These error flags can sometimes prevent the inverter from working properly depending on the error itself.
There's many ways to cause an error to surface but the most common ones are when the generator unexpectedly gets shut off or if the battery temperature gets too hot in the sun or is if the temp sensor is malfunctioning.
For example, if the inverter has failed to start the generator too many times the error state could prevent it from trying to start the generator any more...