Going off of memory here, not always a good thing for me to do
On our 04 Allure's Auto Start and RG7 panel, I do not believe we had a 'manual start' option for the generator. You could set the start/stop parameters of the Auto Start, and then select it to be On/Off.
I believe this was because in the same panel over the door, the Generator Start button was right next to the RG7, so they did not program that option.
Memory may be off on this. Also, our Silverleaf was not interfaced with the Generator either.
As the Allure was one level down from your coach, very possible your's had more sophisticated options programmed into the mix.
Worse case, give the companies tech support a call. They should be able to walk you thru some parameters, and give you tips on things to look over if you should have a Manual On option.
Please let us know what you find out, and also, don't be surprised if you get more input later tonight or Monday - after the weekend warriors get back to the internet!
Best of luck to you,