UPDATE....
So this is weird , just the process of me going into the RSL I/0 ended up replicating your fault. It was fine for a time as I was checking etc.. When I went to leave I Locked up called the elevator up and the fan and light where out and when you register a call on any floor it does not extinguish the lamp after answering . Even weirder is the fact that I went back to machine room plugged my SVT in and as soon as I did the flpr relay picked and the fault whent away. Try M-1-5-1 as vatorgator suggested before anything .