Just bought a second hand mecer 1200va 12v inverter as we had now power for 12 days. Was running fine off the battery that I took somewhere else to charge.
The error I recieved was when it was running on mains, I turned off at the wall while unit was running, so it should have switched over to the battery simulating a power failure and I heard a noise, and now have an error and red light on the led screen. I have opened the unit, cleaned it out, checked the 4x 40A fuses, thermal breaker. My tester can't check mossfets.
Any idea what it could be?