Apu constantly cycling on and off

Thread starter #1
So I've been in my truck for about 2 months. I just came off my first home time(about a week).

Of course I made the rookie mistake and never checked to see if my TK Tripac was on sentry mode before I took my week off.

So I came back to a very dead truck. I jumped the truck and ran for a bit. At first the apu wouldn't start at all. Now it runs but only for a few minutes then shuts off for a minute and then cycles right back on.
The control unit doesn't show the error light. It just runs then shuts down then starts right back up.

I was just hoping if anyone had idea of what this could be to maybe avoid a trip to TK.