In order to do a good job monitoring equipment maintenance and repair center is equipped with appropriate human and material resources (tools, communications equipment, etc.), responsible for the daily monitoring of the monitoring system, maintenance, service, management, equipment maintenance services assume wireless video monitoring to long-term protection monitoring system, reliable and efficient operation. Maintain basic conditions, good surveillance old saying, "make bricks without straw," monitoring equipment offer for maintenance monitoring system is also the same reason vehicle monitoring, the monitoring system for normal maintenance required for basic maintenance conditions, namely "four together", that spares Qi, Qi accessories, tools, Qi, Qi instrument. Access control systems deal with common problems and Symptom 3: A valid card near the reader, the buzzer sounds, LED indicators do not change, you can not open the door. Possible causes: (1) the connection between the reader and the controller is not correct; (2) the line of serious interference, data can not be transmitted to the controller card reader; monitoring equipment installation, monitoring, maintenance source letter from Zhengzhou Source Electronic Technology Co., Ltd. to provide maintenance. Zhengzhou source maintenance Electronic Technology Co., Ltd. (www.hnxywb.com) strong, credible, in Zhengzhou integrated monitoring systems and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead source maintenance and you work into the brilliant, for a better future!