CentraLite 3-Series Motion Sensors is an automation device that acts as a security system. It really easy to install. follow either of these steps to troubleshoot your phone
Replace the battery: You have to remove the battery from the device by opening the battery tray. Then replace the old battery with a new CR-2450. Then place the battery tray back and test the device to check whether it is functioning properly.
Do a factory reset: Remove the battery and hold the reset button by using a paper clip. This button is on the side. Then reinsert the battery and hold the reset button simultaneously. Now the device is reset and you can rejoin the ZigBee network.