Immersion (dielectric-fluid) M56 family - fans removed, submerged. Same integrated-PSU service model; faults are fluid-side. See the immersion/hydro Field School guide.

Troubleshooting
Every Whatsminer fault code for the M30 / M50 / M60 Series family.
7 codesComponents, tools, and firmware for the M30 / M50 / M60 Series family.