Some more help. The trailer has usually two 12v batteries that supply power to the 12v equipment. When the trailer isn't plugged in, the batteries supply power. When the trailer is plugged in, the converter supplies power to the 12v equipment and charges the batteries.
One thing to do when you change the LP tanks, is to light the stove and let it run a few minutes to purge the system of any air that got in while changing tanks. This will help the refrigerator start on LP. If the refrigerator does not light in a certain amount of time, it will go into an error mode and show an error on the control panel. Simply turn the refrigerator off for about a minute then back on. It should start normally then.
When you are draining the fresh water tank, it might be wise to open the filler cap to allow air in just in clase the vent that is in the area is plugged. You also might want to sterlize the water system before using it. Look in the manual and it will tell you how much bleach to use to sterlize the system.
Steve & Trudy
Swamplands of Louisiana
Laissez les bons temps rouler!!!!