I suggest you edit your post put the kernel log inside the insert code you can find it when you edit your first post and look for "#" button.
i'll do the test as soon as i get a new fan, but would there be another possible error? because 2 hash cards are showing 0 hash and one of them the status is not complete
Anyway, the other error looks related to temp sensor but I think it's because of the fan that giving a false signal that could affect other hashboard.
You can try to run it on Braiins OS to test if the 3 hash boards will run normally. Then check the Kernel and system logs and paste them here for analysis.