Vaughn, Are you talking about the EMS system. The Energy Management system has a black 2" by 4" display located with all the other monitors I think in the hallway. It has a display on the left side that is usually blank when plugged into 50amp shore power. If on Generator or 30 amps, it will display how many amps are being used. The PC Board for the EMS is located inside the circuit breaker box on the right side. If the washer dryer circuit breaker is turned off, the EMS gets confused and the rear air conditioner will not work. Hope this helps, Fred