Rooted Verizon S4 on OC1 Accidentally Took the OF1 OTA and Now I'm STUCK
This happened to me the other day, except I willingly took the update thinking it was an upgrade to 5.1.1. 

I ended up unable to boot...

I suggest using Kies and Smart Switch to force-reinstall android. Know that it will flash OF1, and, you will loose root.

Download mode will work fine using Kies and/or Smart Switch.