If you're replacing the controller you would want to replace the entire system. Your system's rooftop unit hasn't been confirmed to work with a different controller and with yours not having a 6 or 9-pin connector you'd have no way of connecting it to a new controller.
For this I recommend the Advent Air RV Air Conditioner System # ADV64FR so that you can have a digital wall thermostat. I do recommend also picking up the start capacitor # ACMSCKIT to help lower the starting wattage needed... view full answer...