We have the same unit, I thought the first unit was defective as it was showing a bunch of codes in the display however there was no power to the bus. Called and was informed that it takes a few minutes for the unit to run its tests before it allows power to the bus( will read instructions next time)in any event while on that particular trip we had lightning strike a tree which jumped into a pedestal next to us. It cooked the guys coach on the other side of the pedestal. We had no damage,whether it was the protector or dumb luck I can't say.
Granvil Tracy
2000 Vantare XLV45, S-2