Hi,
I was going to upgrade the firmware of a Quattro 48/8000 (first time power on). The only cables that are connected are the DC battery cables (yes I checked polarity). Even with the quattro power switch (the 3 way rocker switch on the Quattro) in the OFF position there seems to be a short! The battery BMS turns of and reports a short. Is the quattro defective? I have a Blue Sea 300A main switch in front of the Quattro. when I tried a second time I saw it spark so there really seems to be a short :(.
Is there a way I can verify that the Quattro is the problem?
Best regards