in a rv park with city water plenty of water but no water flow. one daythey had to shut off thewater for the day so i filled the fresh water tank and tried to use the normal setting in udc i cannot get any water to flow. i can hear the water pump running in udc when i turn on the switch on control panel but no flow and the pump is running all the time even when i am not using any water i do not see any switch in udc for pump thanks