Maybe the psu : after a power on off, it loops and can't mine. Will try canaan support by email.

I captured the log just before the crash and after a crash
before crash after 202s, where we have theses max value for temp : MTmax[108 74 111] MTavg[62 59 63]
https://pastebin.com/xNDqrmRGafter crash 206s, where we see "out over hot", and wrong PS value : PS[0 1214 2 0 0 1272]
https://pastebin.com/ZtejwG4x