First, make sure all the pipes are cleaned out well. If you have a power vent make sure it is cleaned out well too. Fly ash accumulates in the venting pipes and can restrict air flow, impacting draft and the ability to keep a fire going (particularly in the lower burn rates).
From the good TEST mode results we know the motors are all working and the thermostat cable and control box are working properly.
When it is in the idle/round robin display is the combustion air motor running? If not, does the display "NOFIRE" come up during the idle/round robin set of displays? If so, you need to set the IGN setup setting to "N".
While you're in the SETUP menu, here are the defaults. Make sure they are set like this:
Time (whatever is right), DEG (F or C, your preference), MIN 6, MAX 40, TBRN N, HLF 0 (this might not be there at all depending on when you bought it), IGN N, FR (not setable, just a display of the current FR percentage).
If those are set and it still isn't working try this: Once the fire is going, go to the MIN setting and increase it to 15. Leave it on that MIN setting. A MIN of 15 should run the stoker motor for roughly 15 seconds of every 100 seconds. Make sure the stoker is coming on for those 15 seconds. If that is fine, continue to leave the MIN at 15 for 20-30 minutes, letting the fire settle down from being started. If the fire looks good then start moving that MIN setting down a couple points at a time every 30 minutes until you get to the point where you think the fire is near going out. Bump the setting back up a couple points and that should do it.
If that doesn't help, give LL (570-752-1811) or us (315-299-3589) a call and we'll try to get you up and running.