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Check if the battery voltage is insufficient, and try to replace the battery.
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In addition to the battery, is the door deformed and stuck?
1. It may be that there is a problem with the driving point of the lock cylinder. >>>More
Use the key to open the door first, and if you still remember the management password, use the management password to reset it and open the door password. If you can't remember the administrative password, remove the screws from the rear panel and press the reset button on the front panel motherboard to reset the password!
Personally, I think that the anti-theft effect of the Panrong Wolverine tooth lock cylinder is very good, it is very cost-effective to buy one, and the price is not expensive, and it is similar to the locksmith to change hundreds of lock cylinders.
First of all, it depends on what material your security door is, if it is stainless steel >>>More
It's very troublesome to repair yourself, but it's not very difficult, first of all, take the host downstairs apart, there will be a lot of wiring behind or below the host, carefully check whether there is any wiring disconnected, if it is good! Then take apart the back of your own extension and see if the wiring is normal! Be careful not to break someone else's! >>>More