Primary and 2nd air gauges

[Gdosxx336]

So my primary and secondary air gauges go to six o'clock when ever I turn the truck on is a 2009 international prostar and the warning beep is on but I do have air on the tanks and also I have breaks and I can hear the tank purge. This also hapennds when key on engine off both gauges go from 0 to past 150 and stay there with alarm on. Does anybody knows what's going on.