This is a message that is generated by your alarm system that lets you know their is an issue with your alarm. On keypad that have an LCD display it will give you a more detailed message by pressing *2 and then following the instructions that it gives you. Most times you can correct the issue yourself, sometimes you will need to call your alarm company to come out and take care of the issue. If you have an older keypad, one with LED lights only, below is a list of what lights mean what on the keypad.
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Alarm Systems of Rome