The Use / Store switch is a mommentary switch in many of the coaches but it is still a Use / Store switch.... press once and it us "Use" and orpess again it is "Store."
There is another easy way to tell if it is in the Use or Store mode while on shore power without unplugging. Turn the breaker off to you converter. If the lights and other 12v applicances go out, it was in the Store mode. If the lights stay on, it is in the Use mode and the batteries are connected.
Just remember to turn the breaker on so your batteries will charge when in the Use mode.
__________________
|