I just purchased a second-hand BMV-700 of unknown history. I wired it up as instructed in the victron video: the shunt to the neg of the battery and the red wire to the positive terminal., and the UTP cable connecting the shunt to the display.
The BMV flashes the display backlighting very rapidly continuously with no apparent message. It's absolutely unresponsive except if I press "setup" and "select" simultaneously the backlighting goes off, and the screen displays bL 1.02 . Pressing "-" once again sets it back to flashing the backlight.
I don't know what this means. Is it displaying a firmware version? Is it an indication of a low supply voltage for the display?