How do you quickly fix random failures in the Fenix?

I swear the lack of a manual for this thing is annoying.  Accidentally triggered a random failure again poking around in the failures menus in the FMC while in the Random Failures section.  From what I understand with manual failures you can just go into the system and instantly clear it, but the only way it seems to clear random that I've found is to use the "maintenance" section and literally sit around waiting for 20 minutes while it diagnoses and repairs it.  Tried changing panel states (i.e. "ready" to "turnaround" etc) which I thought I'd heard was supposed to fix it as well but nope.