Optima 2 plus alarm is continually bleeping and the power light is flashing together with the error code showing '-1' The system has always reset itself after power cuts including a recent 20 hour cut. I have changed the battery and cleaned the zone 1 MPS. I realise the system is elderly but this has always been reliable and no problem previously. thank you for any idea.
have you checked any fuses inside the panel?we don't use these lower end panels,sounds to me like a fuse has gone inside the panel that feeds ac to the pc board turn mains off before you open the panel
