What is Needed
1 – CR-123A Battery
- Ensure the panel is disarmed.
- Open the sensor by pressing the tab on the bottom and lifting the sensor off its mounting bracket.
- Remove the old battery.
- Wait 15–20 seconds.
- Install replacement CR-123A battery.
- Close the sensor by sliding the top into the mounting bracket, then swinging the sensor down and clicking the bottom into place.
- Check the panel to see if the error has cleared.