I have a 50 ton Trane RTU with the Intellipak system that gives me a high supply air pressure alarm everytime it comes out of night set back. It is programmed to only go into set back 3X's a week for VAV calibration purposes. After being manually reset it runs fine for days, up until the next scheduled set back. I should also mention this unit has the inlet guide vains on the blower. They seem to operate fine after a manual reset. Any ideas what might be causing my unit to go off on high supply air pressure?