You should always check the display and the lights. Home security providers always include a manual that clearly explains what to do when you doubt the functionality. Steady green lights are universally mean “everything is fine”, while flashing signals or red lights indicate a problem. Touch-screen consoles inform you with short messages like “armed” or “active”. Some systems are fitted with a test function that allows you to run a quick analysis. In case you are still having scruples, then we recommend to check the company’s FAQ or contact their customer support.