Troubleshooting a unit: if you can access the dashboard of this unit, just go directly to the kernel logs to check what the cause of the issue is, then check Bitmain's support for the solution guide if they have if not then use the search button here on the forum to look for a solution before making a new thread if your problem doesn't solve.

It looks like you got that high error due to an overheating issue. If I got the error, the first thing I would do is to clean the unit and clean all terminals first; it might be due to rusty terminals from the power supply.
If it still doesn't work, try to flash the unit with the latest firmware or switch to other firmware like Vnish or Braiins OS.

It looks like you got this image from Bitmain common issues and solutions? Why not try their solution? Yet if it doesn't work for you, try my suggestion.
- https://support.bitmain.com/hc/en-us/articles/360025531034--For-S9series-Common-Problems-Indicated-by-Miner-s-Kernel-Log-and-Ways-to-Resolve-them