Put the valid card close to the card reader, the buzzer sounds once, the LED indicator turns green, but the door lock is not locked

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Q: Put the valid card close to the card reader, the buzzer beeps and the LED indicator turns green, but the door lock is not opened. Possible reason?
answer:
(1) The wiring between the controller and the electric lock is incorrect;
(2) Whether the power supply of the electric lock is normal. The normal output voltage of the power supply is about DC12V. If the voltage is too low, such as below DC11V, it may cause the relay of the controller to be unable to be driven.
Thus there is a play card or the button does not open the door; if it is disabled by 1], the software is monitored in real time. At this time, the phenomenon will be that the swiping card has a record of opening the door and is allowed to pass;
(3) Electric lock failure; the electric lock itself is abnormal, such as the lock tongue is mechanically stuck or damaged.