V-Core 3 shutdowns mid print

Hello all.
I have a RatRig V-Core3 500x500 printer. I have like 1 year or so. I still have some troubles with leveling the bed and printing with PETG. But the main problem i have is during long prints, randomly the printer shutdown. On the next day the printer is totally cold, the printer head is stopped in middle of the print, all fans shutdown and I'm unable to access the printer, give the error that moonraker is inaccessible.
I already search the logs but don't find anything.
I'll attach the logs.
Any one have ideas?