Image Sensor - Reset Tamper Trouble
Changes in sensor orientation can register as a potential tamper error. This tamper normally clears within 5 minutes after the sensor has returned to its mounting bracket.
Insert a paper clip into the front reset hole, and hold the internal button for 3 seconds to reboot the motion detector.
Alternatively, remove the front cover, then remove batteries. Wait 10 seconds before replacing the batteries to power cycle the device.