Good day,

I have a KCM831 2- stop Hydro that is not registering a 2nd floor car call from the COP. I can make a call from the 2nd floor hall or from the cpu with no problem and send it down from the COP, but when you press the 1st or 2nd floor button both will light up. At the bottom floor you can press 2 and again both will light up and open the doors. Everything else works properly besides the 2nd floor car pushbutton.

I've tried LON upload, replacing the ribbon cable, and swapping the pushbuttons in the COP but nothing changes.

Any and all help is greatly appreciated.
Thanks in advance.