Top of the dash has all your fault lamps. Top middle is a exclamation mark that came on and stays on. Hour meter won't display because there is something trying to display but never really gives you an idea what it is. Almost looks like part of a p. Unit runs good but I can get the lamp to flash on and off if I run hydraulic lever into relief and lowers the RPM's. If I lower the RPM's then my hour meter displays a fault code "24". Any idea why lamp is on? Need help!