IF he is firing you for calling for help on this unit, you don't want to work there long term. Coming from residential to a Voyager are complete opposite ends of the spectrum. Ive been working on Voyagers for a bit and still pull my hair out at times..
There are test terminals on the right side of the unit. I believe TB1. You can jump them out to get the unit into the different modes of operation.
Also how was this unit being controlled? BAS, Summit, of a conventional stat?