Hello, the central control fingerprint access controller is used as a reader, sometimes the door can be opened normally, and sometimes the fingerprint access controller passes through, but what is the cause of the door cannot be opened, and how to solve it?

Hello, you swap the entrance and exit ports, and then open our FCRRD35000T one card pass management software --- "Data Monitoring" to see if there is any data displayed. If there is a problem with wiring or access level. If not, you need to judge, please confirm whether the device voltage is normal, if the voltage is normal, please check whether your wiring has strong electrical interference.