PROBLEM
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SOLUTION
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- The garage door doesn't close.
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- Check if the garage door power cord is plugged into the wall outlet.
- Check if the battery is installed correctly.
- Press the red button to switch to RUN mode, the green LED blinks once.
- Align the unit so that the sensors face the garage door in a line of sight.
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- Replace the 9V battery with a fresh one.
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- The garage door doesn't close but the unit beeps once a second then twice a second, and the relay inside clicks.
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- Check if the garage door opener power cord is plugged into the wall outlet.
- Check if there is a good connection between the wires coming out of the unit and the wires from the wall switch.
- There may be an object obstructing the light barrier.
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For more information or help email to service@novalert.com