upon power uo of my recently purchased optima gen4 copact alarm the alarm sounds- enter code 0123 and the alarm siren silences. i have no flashing tamper light despite the cover being off,i have a flashing sos led which will not go out whatever i press? i have the global tamper pa & ta terminals shorted out but still am unable to extinguish the sos led.

do you think the unit is faulty or am i missing something obvious

Hi , you should have a link between the PA , TAMP , TA (scb connections) and the RKP tamper.Power-up the panel , enter user code , alarm will silence , close the lid and press RESET , all leds should go out except DAY and POWER .Maybe you are confusing the leds with the lid being open.