F86 fault !!


New Member
Jul 5, 2022
Installed two Sun Gold SP6548's (MPP LV6548 clone) running split phase. I had a couple of faults when freshly installed and managed to overcome them, but this one has me stumped. Out of the blue, last night, inverters shut down. Surprising, since they had been working for at least 24 hours straight at that point. When trying to reboot them, sometimes it's both inverters, but most of the times it's the second (slave) inverter that is throwing that error (F86). The settings also changed on their own, and it wasn't default settings. Another weird symptom is that they "click" about every 3 seconds. Both inverters and not at the same time. I confirmed that sound is coming from display LCD module. Any help from member is greatly appreciated! Thanks!