Details of the problem:
After installing your FC-103M access controller, the door cannot be opened by swiping the card after the power is turned on, the test is normal when it is removed, what's the matter?
Expert answer:
Hello! Thanks for using our company's products! You should check your wiring method according to the product manual to see if there is any missing or wrong connection. When conditions permit, you can use a universal meter to test whether the wiring of each port is connected.
