Hello all,    Another 3 years since my last post, and unfortunately once again it's Sunamp related. We have separate 3kW and 6 kW SunAmp PV's installed back in 2018, despite some early installation issues we've had fairly reliable hot water since 2019. However in the last few weeks we've noticed that our larger 'tank' is no longer filling up at all - it appears to have gone into the cold start mode to protect the PCM.   Our Eddi diverter is still talking happily to the smalle