I only asked about those interlocks because you mentioned you were a new owner/rv'er. I fell for that trap when I was a new owner (& once or twice afterwards).
The next trap I've found, and I don't know if it applies to your unit (& you may have tested for it already): Are you certain there isn't a circuit breaker tripped, or a fuse blown? Some of the circuit breakers used are nearly impossible to visually see the state. And the control circuits to the circuit breaker would most likely have fuses.
My info shows there is a 30 amp breaker in the power relay compartment (near the 80 amp breakers) This is of the style where the tripped arm is difficult to see. There is also a parking brake relay that must be activated & powered. In addition, there is a 15 amp fuse with wires numbered something like "SSL" and "SSL2".
My guess is that will keep you busy for a couple hours - it's my lunch time
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