Well, if the controller lights up it's doing something! You probably have an issue with the compressor assembly, one of the solenoids hanging up, plugged compressor, etc.
Speaking of compressors, when manually airing up the shocks, ONLY use a manual one that is specifically designed for small volumes of air! Do not use a compressor that you would inflate a tire with, it would supply too big of a volume and blow the bladder on the rear, and blow the seals on the fronts!
I agree with you, for the most part CLASS is a mind stroke and really isn't all that functional...