Reset a newly installed replacement key pad? 9827 ?

Hi Gill,
Have you tried a total power down of the system? Switch off the mains power supply to the main control box, open up the control box and disconnect the back-up batteries within the control box. Wait ten minutes, reconnect the batteries, close up the box and reconnect the mains power. Your old code should work once this is done.

Rupert
April 2020