Take a volt meter and test the output of your converter. Also, take a standard battery charger and charge your battery outside the unit and then take the battery to a auto parts store and get it load tested. Your battery may be shorted out and causing havoc with your converter. If your converter is fine at this time and your converter keeps trying to compensate for your bad battery (if you have a bad batt) it will mess up your converter in time.
2013 Forest River Salem Hemisphere SBT312QBUD
2001 CrewCab F-250 7.3 PowerStroke Diesel
SuperChip, BTS transmission, 6.0 Trans Cooler