Filter Pump Won't Turn OFF

Hi,

I don't know much about my pool equipment but I have a Jandy Aqualink RS4 and the filter pump will not turn off. I wen't outside to the control panel to try to switch it to Service or Timeout mode but it wouldn't work. It wouldn't let me and the filter kept going. Usually the light in the inside (house) panel comes on to green but it doesn't come on, I tried pressing the button on and off but that didn't work either. I finally had to turn off the black circuit breakers to the filter off.

Any suggestions? Thanks for the help much appreciated.