Why is my DSC 1616, 1832, or 1864 system keypad beeping and what does the yellow triangle mean?

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If your keypad is beeping or has the yellow triangle illuminated, that means that your system has a trouble condition. To find out exactly what it means, you’ll need to press *2 on a keypad. If you have a full message keypad such as a PK5500 keypad, the keypad will give you some information as to what the light means. You will just need to use the arrow keys to scroll through. Often you will then need to press * to go deeper as to the specific cause. With a PK5501, when you press *2 a number or multiple numbers will appear on the screen. These correspond to a trouble condition. As with a full message keypad you will often need to get more specific information by pressing the number of the trouble condition. The screen should show a new set of numbers that will give you more information.

• 1/Service Required: If this is on your screen, it could be a number of different things. Press 1/* to find out what is wrong more specifically.

• 1/Low Battery
• Reason - The main panel battery is below 11.5 VDC. The trouble condition will not clear until the battery is at least 12.5VDC under load.
• 2/Bell Circuit
• Reason - There is an open circuit between Bell+ and Bell-
• 3/General System Trouble
• Reasons:
• An open circuit is present on output #1 of the PC5204 module
• The PC5204 has an AUX failure
• The printer connected to the PC5400 is off-line
• The wireless receiver has detected excessive noise in the 433MHz range (Power432, 632, 832 only)
• 4/General System Tamper
• Reason - An open circuit is present on the tamper input of one or more modules
• 5/Module Supervision
• Reason - The panel has lost communication with one or more modules on the KEYBUS or a keypad has been assigned to a different slot 
• 6/RF Jam Detected
• Reason - The wireless receiver has detected excessive noise in the 433MHz range (Power864 only) 
• 7/PC5204 Low Battery
• Reason - The PC5204 battery is below 11.5 VDC. The trouble condition will not clear until the battery is at least 12.5VDC under load.
• 8/PC5204 AC Failure
• Reason - No AC present across the PC5204 AC terminals

• 2/AC Trouble
• 3/Telephone Line Trouble
• 4/Failure to Communicate
• 5/Zone Fault: Press 5 to find out which zone(s) has the fault.
• 6/Zone Tamper: Press 6 to find the specific zone(s) that has the tamper condition.
• 7/Wireless Device Low Battery: Pressing 7 will toggle through the different wireless device types and show which device number has the low battery. The first press will show zone numbers. The second press will show wireless keypad numbers. The third press will show key fobs.
• 8/Loss of Time and Date

You can download the official DSC Trouble Code Worksheet HERE for detailed listing of possible causes of troubles