Hi,
I have a weird issue ( for me !)
I just installed my Multi RS in an isolated site (very unreliable mains).
When disconnected from grid everything works fine.
When connected to the grid an error #43 is issued.
Tested resitance to the ground (OK) and previously no issue was evidenton the home electrical circuit.
I know that you cannot fix/give answer for specific situation buy is there anywhere genral ( or more specific) advice to approach the problem ?