At the top of the forum page, there is a spot that says Fanuc alarm codes, I would go there and you can search the faullt that you have at the top of the teach pendant.
Must admit that I have never seen that one. Good luck.
It looks like you trying to run a Karel program at bootup.
A register of some type is not valid
Cause: program error KAREL. Untaught or uninitialized data.
Remedy: Teach the data.
I have the exact same problem. Did anyone find a solution?
I had exactly the same problem. I found out that pressing one of the U buttons puts it in that state. I assume some routine to lockup controller functions to protect from messing. Not sure. BUT what solved it was to do a "controlled start" (NOT an "init).
Hold F1 and F5 and keep holding while turning controller until booted into the maintenance manual. Then choose controlled boot. Then a hard boot. That did it on my end. Back to normal.
