Thanks, I'm looking for a mistake in the cables to the main contactor. By the way I found some trodden cables and accidentaly put 24v direct on the exit of 80/24v converter but in the cables of the machine not into converter, the converter have the plug off so it didn't suffer anything but when I plug the battery it make short circuit, I turned all off and repaired the cables and connected it right this time. Now I have 100V in the IN of the converter 80/24 when it supposed only have 80V. I don't understand how it's possible or what I burned to it happens...