Do you have RSLogix software?
If the red light is blinking on the Processor, then you'll need the software and programming cable to clear the error.
The software may help you find the cause of the error too.
Trouble is is that the software is expensive, it may be time to call in a controls guy?
But if you want to fix it yourself, I'm sure that you can do it.
It's not rocket science. Besides despite that first reply, there are plenty of people here that can talk you through it.
:site:
Oh one thing I forgot, there may be laws where you live stating who can and who cannot work on Elevators.
Although I think I could figure out the code, I don't think that I would want to work on Elevator code without qualifications.
Good luck