Honeywell Models
(Vista 4110, 4110xm, 4120, 4140, 4142, 40, 50, 10, 15, 20, 21IP, 32fb 128, 250):
AC Power Loss
Your Honeywell alarm system will let you know if its AC power supply has been cut off. Aside from the beeping sound, your system will also display AC LOSS or NO AC. When that happens, the security system is running on backup battery power.
Keypad display – AC LOSS or NO AC
To silence trouble beeps: Enter the user code followed by the OFF key.
Reset once power returns if still showing low battery:
- Disarm the system twice. Key in your four-digit security code. Press 1 (or the OFF key). Do this step again. The green READY light will then turn on.
- Arm your system. Key in your security code and press 2 (or the AWAY key). The keypad will beep twice and display the Armed message.
Low Battery
Over time, your system battery will drain and will need replaced.
Keypad display – SYSTEM LO BAT or BAT
To silence trouble beeps: Enter the user code followed by the OFF key.
Replace the battery: Open the control panel. To open the panel, try opening it with a screwdriver. Some panels require a key or security code to be opened.
Identify the battery. If you can remove the panel yourself, you’ll see a small, black, square-shaped box connected to a circuit board. This is the battery. Take note of what type of battery it is so you can purchase a replacement. Call 770-963-0305 to pick up a battery (at our office in Suwanee, GA) at no charge.
Disconnect the battery from the circuit board. You’ll see two wires connecting the battery to the circuit board. Start by gently removing the black wire from the negative terminal on the battery. Next, remove the red wire from the positive terminal.
Safety tip: Be careful that no metal objects touch the battery terminals or wire connectors.
Connect a new battery: Reconnect the red wire (positive terminal). Then, reconnect the black wire (negative terminal) to the battery.
After the battery is connected, go to your alarm keypad and see if low battery notification is gone. If the warning persists after 4 hours (could possible show low battery up to 4 hours after replacement), contact EMC Security at 770-963-0305 for further troubleshooting.