optima 2cannot reset after replacing new pir?

hi is there anybody who can tell me how to reset a optima 2.A new pir has been fitted and now when i try to programme i get a constant rolling of the numbers of the sensors ,ie 1,2,3.4 this then starts rolling and the only way to stop it is to go back to home red power green day.I have contacted an engineer but it seems no one wants the work in this area. Also i have the engineer code if needed.