Barrier gate doesn't close after vehicle passing is a problem sometimes customer will meet. Coma car parking supplier will introduce some methods to check it.
1. The grounding loop is buried incorrectly or the coil is damaged or broken;
2. The power supply of the vehicle detector is insufficient (Max250mA) or the sensor sensitivity is not adjusted properly (too high or too low).
3. The line encounters strong interference (such as the communication line and the AC power line are laid in the same pipe);
4. If the line is too long and exceeds the effective communication distance (200M), the signal will be seriously attenuated;
5. The ground terminal (signal ground) of the card reader control board and the AC power supply (power ground) are short-circuited to cause communication interference; (when they are disconnected from the factory, they are in an offline working state; when they are connected to the computer, they must be short-circuited online);
6. The communication between the computer and the card reader is not working properly. The controller cannot receive the door open command.
COMA parking manufacturers sells more than 9000+ parking projects all over the world. Parking entry ticket machine, exit ticket machine, card dispenser machine, ANPR/LPR barrier gate system, smart parking management system software, parking flap lock unit for outdoor parking, pay and display parking meters, toll management system are our advantages.