Hi I installed an inverter 5kva 48v not an original mecer but one of the many other Chinese versions on the SA market.
3 months down the line error 90 comes up and I have no clue how to erase or reset unit.
What I understand is error 90 is a software glitch. I'm an electrician not a it boff and have no clue how to sort.
Any help would be greatly appreciated.
Gary