International Sleeper Auto Climate

I just got a International sleeper truck. How do I work the Sleeper Auto Climate control? There's instructions posted next to the buttons in the sleeper, but they are vague.

The 1st few times I tried the Sleeper Auto Climate, trying my best with the instructions, it wouldn't stay at my desired temperature...the screen indicator in the sleeper kept creeping up to a hotter temperature..it stays too hot in the truck when I have all the settings on max A/C and the truck doesn't stay on until battery voltage gets too low, then the engine will start by itself...