as a fellow Palazzo owner, I might can help, but give us a little more information as there can be model year differences in the installation and devices used in the '17 versus the '14...
- what do you mean when you say 'switch over'... are you saying that you are waiting 30minutes after you've plugged your shore cord into the power source for the coach to move from 'Inverting' to 'Charging' on the Inverter Panel, and for you to have access to using your roof air conditioners, etc? Are you hearing a 'thump' almost immediately when you plug into shore power?
- I imagine that whether you are plugging into 50amp shore power, or 30amp shore power, it should make no difference, as it is all the same 120v power*. Even a household 15amp outlet should work.
- my Transfer switch is within the foot-end of the bed frame, under a panel cover. Your may be in a different place, but I can remove my ATS box cover and easily see the design of the wiring and magnetic switches inside, with two main incoming wire set from the Generator and the Shore Power, and one outgoing to the Main Electrical Panel.
-What is the 'adjusting the dial' you are referring to? SHORE MAX setting? If so, that will have no bearing on the ATS function, but only serves to help limit the Battery Charger from using too much amperage if you are on 30amp or less shore power, but otherwise would not have any impact on the 'time' the ATS takes to switch over.
when you crank and run your generator, does the same 'lag time' happen? When you use the generator, there WILL be a 20-30 second transfer time, as the ATS is registering the voltage output of the generator, which takes time to spool up, as opposed to Shore POwer, which should IMMEDIATELY switch over.
when you are plugged into shore power and 'waiting' for it to switch over, are you hearing anything from the ATS? Such as a 'nervous jiggle' or something? (that's a fancy term for the magnet(s) trying to make contact!)...
one thing that can happen with many coaches, many times fairly soon after ownership and some travel history, is that the wiring connections are becoming loose... I would unplug from shore power, and check the tightness of each wiring screw within the ATS.
A loose connection can cause many issues, working sometimes, and not others.
*50amp Shore Power is actually 240v, with two incoming 120v hot wires, which is what the coach uses within it's Main Panel - it doesn't combine the two for 240v, though, but uses them separately for two 120v 'sides', for a total of up to 100amps of usable power : )
two Campers, two Electric cars
former diesel pusher traveler