Canaan clarified a week or so ago, I think I posted about it here or another thread. Lily is our main contact.
6 month comprehensive warranty, 2 year limited. Now I sound like an insurance agent.
It would be good if they posted that on their website. Suggest mentioning that to Lily if you get the chance.
ps. If you happen to be talking to her, please ask her to have someone address the issues posted on the Avalon Management System github forum.