Hi my elderly aunt (she’s 82) has a scantronic 9450. Never had any problems with it till last night. The arm started sounding even though the alarm was in a disarmed state. She used her user code and the alarm stopped. It went off a total of 5 times through the night and twice again today. I have searched and found the installation and users guide but there is no fault finding listed on it. She says all of the lights are illuminated