I have a RCBO circuit dedicated to an AC unit. Obviously the AC is now off due to the fault. It has tripped once before, but I flipped it back on and it seemed ok. The AC stays off until I power it back on.
I noticed it has tripped again today, but when flipping the RCBO up, it immediately trips.
Since it is a dedicated line to just the AC, there is nothing else that could be pulling power and causing the trip. What should I be testing and what can the potential problems be?
Edit 1: There is no intermediate switch. I know enough (although unlicensed) to disconnect the AC unit from the wiring, insulate the ends, and see if the RCBO resets.
Edit 2: I've disconnected the AC from the wiring and the breaker trips immediately. That's going to be a new question...