1. When the access control system is installed, everything works normally. Why is the card reader unable to read the card after using it for a while?

Troubleshoot problems:
The first step is to check whether the power supply is working normally. The second step is to check whether the card reader is damaged. The third step is to check whether there is strong magnetic interference around the card reader

If the above steps are eliminated and the card reader still does not read the card, it can be determined as the following causes:

A certain amount of static electricity will be generated when the card reader device is used for a period of time. The accumulation of static electricity over a long period of time will cause excessive power consumption. The shorter the use time, the more problems such as the card reader will age too fast.

Solve the problem:
Before installation, choose a power supply with good quality and power gate ban. If this happens after use, separate the power supply from the electric lock and the card reader, and add another power supply to the card reader to supply power separately.

2. Why does the access control card reader suddenly read slowly and the sensing distance becomes shorter?

Troubleshoot problems:

Step 1: Whether the card reader is installed on the metal Step 2: Whether the card is swiped in or out, such as how much the distance between the two readers is

cause of issue:
If the card reader is mounted on metal, because the metal has a shielding function, part of the radio waves emitted by the card reader is shielded by the metal. If you swipe in or out, the same problem will occur when the two readers are installed too close. The two readers emit radio waves at the same time. The mutual interference of the radio waves will cause slow card reading, and those that are too close will not read the card.

Solve the problem:
Observe the installation environment of the card reader during installation, such as metal behind the card reader. When installing the card reader, add a plastic plate (special material) behind the card reader

If you want to swipe in and out, the two card readers must be staggered by 30CM. If the conditions do not allow, you need to install a shielding plate on one of the card readers.

3. Why are some glass doors installed with a lock and found that the door cannot be closed when the lock tongue is down?

Troubleshoot problems:
The first step is to open the door, do not close the door for a while to see if the lock tongue is down. The second step is to close the door when it is opened, to see if there is a back and forth swing when the door is closed

cause of issue:
The first step is to check if the lock tongue is down, indicating that the lock is broken. The second step is to check that if the door swings back and forth, the lock tongue has come down when the door is closed. It means that there is something wrong with the ground spring of the glass door.

Solve the problem:
If the lock is broken, you need to replace the new lock or repair it; if there is a problem with the ground spring: first, let the door adjust the ground spring. Second, use an electric lock with the magnetic side of the door when installing the access control. The lock must be adjusted or changed, and then the lock is changed.

4. Why can't the card reader and the software communicate with each other?
Troubleshoot problems:
First, check whether the communication converter is damaged. Second, check whether the circuit is short-circuited. Third, check whether the communication module of the card reading device is not damaged.

cause of issue:
The first step is to check if the communication converter is broken. There are two reasons: 1. The quality problem of the communication converter. 2. There is strong static electricity on the communication line.
The second step is to check the line with a multimeter. If a short circuit indicates that the line is damaged, the third step is to see if the communication module of the card reading device is bad to see if the power is too high or the communication line has strong static electricity.

Solve the problem:
The communication converter is damaged and replaced with a new one. If there is static electricity on the line, the converter should be replaced with an external power supply;

If the communication line is short-circuited, it should be removed in an emergency, otherwise it will damage the communication module of the card reader. The communication module of the card reading device is damaged. Replace the communication module or the card reading device. If the communication line has static electricity, use a shielded communication line and then ground it.

5. Why is there a card in the card reader that cannot be read suddenly?

Troubleshoot problems:
First, change a card to see if it can be read. Second, put this unreadable card on a different card reader to see if it can be read.

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