Old thread, but thanks for this manual! Helped me troubleshoot.
Apparently these are NOT waterproof and should not be left in the back of your truck in the rain. I live in Southern CA and it's only left in the bed (under a RTT, but the front sticks out a little) when going on trips.
Going to replace the control board and hopefully that fixes it. Also going to drill a weep hole in the bottom of the pocket.