For some reason, the AC pass thru is not working on my multiplus 2000. When I plug in shore power and turn the switch to 'on', the Inverter(Green) LED will light up for a few seconds then switch to the charger(Orange) LED, and I get no AC power out. VEConfig doesn't show any issues with the input AC(118v, 60hz). I've tried changing some of the settings like weak AC input, and UPS power but nothing seems to help. Does anyone have any suggestions?