Common Faults And Maintenance Methods of Access Control Systems

1.The door cannot be opened with a valid card

1) Check whether the electric control lock is normal Check the power supply or replace the electric control lock

2) Whether the bolt and the buckle are mechanically stuck, repair the mechanical failure or replace the parts

3) Check the indicator light on the control board, whether the communication between the control board and the module is normal, and troubleshoot

4) Check whether the communication between the card reader and the module is normal, and troubleshoot

5) Whether the information day closing command is set, and the opening time is adjusted through the software

6) Whether the operator initializes the Face Recognition Access Control System or other commands and re-authorizes through the software

2. Access control communication fails

1) Check whether the serial port is set incorrectly (determine the serial port used)

2) Check whether there is a short circuit or open circuit in the access control communication bus (exclude short circuit and open circuit in the communication line)

3) Check that the communication chip 75184 of the RS485 communication card is damaged (replace the communication chip 75148)

4) RS485 communication card is damaged (replace RS485 communication card)

5) Check whether the crystal plug of the network cable is well done, and check whether the network cable is connected

3. Unfinished access control record extraction

Clear the Access Controller, reload time

Access Control Card

4. The LED indicator of the card reader is always green, and the door lock is always open when the card is not read, and the communication is normal

1) The operator sets the state of the access controller to normally open, or other reasons cause the controller to be in the normally open state

2) The controller is faulty. Set the state of the door lock controller to normal. If the fault still exists, replace the controller.

5. IC card cannot be read

1) The IC card has been set for the valid time period of card reading when the IC card is authorized (can be used for all-day card reading valid setting)

2) Abnormal heating of the access control controller (replace the access control main board)

3) Access control read-write antenna (adjust the fine-tuning capacitor to enhance the card reading distance)

6. The communication between the computer and the controller is unstable, sometimes good and sometimes bad, and there is no fixed rule.

1) Use of signal lines that do not meet the requirements or poor quality signal lines

2) The signal line is not laid in a standard manner, such as the signal line and the power line in the same tube

If necessary, please contact the Access Control System Supplier