andiesstuck

I changed a battery in the dining room PIR and the alarm now won’t set.Displays says:!!Enter Code!!!!!Check!!!I enter code and hit reset and the internal alarm starts sounding and display again says!!Enter Code!!!!!Check!!!I enter code again and it saysDining Rm RPI T!I’ve searched online (I know nothing about alarms) and I’ve tried stretching the spring slightly but still the same. I’ve tried attempting to set whilst holding spring down and get the same error.Please does anyone have any other suggestions?