Thoughts
We also have a (2017) Quantum KM24. I do not have any troubleshooting to offer, just misc feedback.
If our Quantum a AGS I am certainty not aware of it. We did not get any manual regarding AGS. It was also not listed in our components list from Thor.
I find it interesting that your generator will start without battery power. I just upgraded to Lithium Ion batteries and when I removed the batteries the generator would not start until I got the new batteries installed. I believe it started OK on shore power even without batteries installed.
Were told by a Tech to always prime our propane powered generator. It seems to have trouble firing up if I do not prime it first. We push our rocker switch down until a LED lights up meaning it is primed. Then we push the switch up to start and it always fires right up. Cummings recommends running the gen at least 4 hours a month for our module. I do not worry about running it too much except that the maintenance schedule comes around faster.
I am with those who suggest calling Thor first and then get it in to a repair facility if you cannot solve it on your own.
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