I got into the freeze situation again and did some tests as recommended.
The EZServe still responds and I am able to log in. After I log in I get an error message though “Unknown PLM return”. Trying to control any lights manually from the EZServe GUI does not work.
I used the “restart” option but when I log back in it still shows the error “Unknown PLM Return” and the manual control of the lights don’t work.
So it seems the PLM portion of the controller is frozen, not the EZServe part. Unplugging the unit resets it back to working condition but at the moment I left it in it’s frozen state, in case there is something else you want me to try while it is in this state.