What is the situation that the eight-character door opener always calls the police when closing the door?

The loosening of the locking screw may trigger the anti-pick alarm switch. Solution: Re-tighten the locking screw to eliminate the alarm, just open the door in any correct way. 2. If the battery is too low, the low voltage will give an alarm. Under normal use, the frequency of battery replacement is about 5-8 months. In this case, everyone is likely to forget when the smart fingerprint lock battery should be replaced. When the fingerprint lock is "awakened", it will give an alarm to remind us to replace the battery. Solution: Replace the battery with a new one.