I have my chime set to the same address as the Flood came (e.g., A7) and it sounds every time the Floodcam detects motion - day or night. Check your addresses. Send the "on" command to your Floodcam with a palmand confirm the chime sounds. If not, you eithe rhave a defective Floodcam or chime. Try a lamp module set to the Floodcam address and she if it also fails at night. That would tell you the floodcam is bad...