Solidstate,
Service access didn't what the E9 code was but suggested unplug the cat5 jacks at the controller one at a time. If I end with all the jacks unplugged, I should pull the control board for repair.
I'm visiting one of our colleges in San Juan this week. I'll post what I find when I get back.
It's not much? But it is somewhere to start. I find it hard to believe there isn't a complete set of error codes to be found...
