Since all the control board lights are on, there seems that power is getting to the motors and ignitor...by the way, in test mode, the ignitor light shouldnt come on.
Here is the one glaring thing I see. Honest answer now.......did you clean your unit just after shutting it down in the spring? Another reason it may not be coming in is due to ash blockage. Take the cover off the comb blower and give it a spin to see if it turns freely. Does it? Remove the cover by the ignitor, see if theres much ash in there, and clean it out. Many a time, weve seen the comb blower froze down by hard ash, and the ignitor covered in ash as well. Most folks wont admit they didnt clean, but its pretty telling when you open the ignitor access door and see alot of ash....clean it out, and the stove lights.
Another thing......is your pipe clogged by anything? Ive pulled 6 dead birds out of one, and that will cause you not to feed either. Bees nest? Dead Birds? Alot of ash? All can clog a pipe.
The comb blower is also 110, so you can hook it up directly to an outlet using a pigtail. Does it turn then?
My guess is its a frozen comb blower due to rust, ash, or what have you. I might add that your stove is certainly covered under warrantee, parts and labor. So, if you are sure it isnt a maintenance issue, call the dealer.....should be free, unless of course, the unit hasnt been cleaned. Harman doesnt have a page yet on how to clean the XXV, but heres the link to cleaning the Accentra FS....similar to the XXV, and it shows the ignitor access and comb blower cleaning quite well.
http://harmanstoves.com/maintenance/accentracleaninginstructions.pdf
Let us know how you make out! Good luck!