Recently installed a JACE (Webs 600) on a network that includes 2 York YPAL 90 ton RTU's. These units have the old Optilogic control boards in them. About a year ago, someone installed Lon boards in them. We were able to discover all of the points but I'm unsure what some of the values signify. For example: a point labeled LastActFault, a numeric point, displays 0 during normal operation, and 7000 during a supply fan fault, and 21 during a air switch failure (switch still closed after fan shuts off). A number of points, enumerated, numeric, etc, are like this. The factory has no published reference material.. It's been a struggle. Anyone out there have some info on this? Thanks --- gman