If the above three steps have not found any problems, check all circuit. Check whether the wires in the circuit breaker, in particular, whether the wire trunking trunking is cut off due to the pull. Check whether there is damage to the trachea of ??the crease. Check the hydraulic hose is blocked. In this step, check the circuit when necessary to use a multimeter, transferred buzzer files, check the circuit path situation. If severe tracheal crease replaced immediately. Hydraulic tubing just have to be replaced. In that the above step is correct, only possible fault in the controller, but it can never be procedural issues! First, do not destroy the controller must be as long as there have been no serious short circuit, internal controllers have short circuit protection, short circuit will not burn the controller general. First, check if there are high-frequency interference in the vicinity of the device controller. If so, move away immediately. If outdoors, strength of lightning can also cause the controller does not work at the moment. In this case, first remove any possible interference device, and then reboot the controller. Secondly, if the restart is invalid, check the controller wiring is loose, there is bad situation. Finally, if the wiring is correct. Determine whether the PLC memory card problems. Replace a new card, download the program, check whether the previous memory card is defective. Hydraulic drive system because of its unique advantages, namely with a wide range of process adaptability, excellent control performance and relatively low cost, to get more and more widely used in various fields. However, due to the objective element, the quality of instability and accessories subjective use, improper maintenance, and the system of each element and the working fluid are enclosed passage work, not as intuitive as machinery and equipment, electrical equipment that may not like using a variety of testing instruments easily measure various parameters, hydraulic equipment, relying on a limited number of pressure gauges, flow meters and other parts of the system to indicate that certain operating parameters, other parameters are difficult to measure, but in general there are many possible root causes of failure This caused some difficulties to the hydraulic system fault diagnosis. [1] In the production site, due to the constraints of production planning and technical conditions, require troubleshooting personnel is accurate, simple and efficient fault diagnosis of hydraulic equipment; ask the service technician use of existing information and on-site technical conditions, the hydraulic automation plant, to minimize the dismantling work, hydraulic automation equipment company, saving time and expense repairman, Tianjin hydraulic automation equipment, with the most simple technical means, in the shortest possible time, to accurately identify the fault location and occurrence Failure to repair and restore the system to normal operation, and strive same failure will not happen again. Hydraulic automation equipment at home and abroad, Tianjin hydraulic automation equipment, provided by the Texas subfamily subfamily hydraulic machinery automation equipment Limited. Texas subfamily Hydraulic Machinery Automation Equipment Co., Ltd. (dzykzdh.com) strong, credible, in Dezhou industrial automation control systems and equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead subfamily automation equipment into the brilliant and you work for a better future!