Sounds like your vfs5 just broke - with shorted output transistor.
the cnc control faults reported say the vfs5 is off (faulted). this shuts off machine, causing z to shut off and it drops 3mm before brake comes on so no problem there.
since load meter says 85% load when none, sounds like vfs5 is really broke and maybe has shorted output transistor causing load meter to go to 85% when it turns on.
contact Cincinnati - they will repair this for you: they have Russian language listed on their website i see - link & phone number: