Inverter maintenance problem sets for use bad environment What are the requirements? ① temperature * Allow ambient temperature: -10 to 40 ℃ (such as removing the ventilation casing can be made to 50 ℃) inverter internal temperature is higher than 10 ~ 20 ℃ ambient temperature * installed in the closet, be sure to pay attention to the volume of the cabinet position, air volume exhaust fan of the drive. * The lower the ambient temperature, the inverter life will be longer. ② humidity * 90% (no condensation) in the case of outdoor equivalent. If the ambient temperature suddenly drops, drops of water condensation will easily arise. PCB connector portion after drying siemens maintenance inverter, the insulation will decline, may cause malfunction. ③ conductive dust, oil mist, corrosive gas, although the circuit board from dust and moisture have been treated 6se70 maintenance inverter, but the contact portion connectors, and so can not be processed. * Mist fan → mainly affected * corrosive gas → mainly copper, the pin will corrode the drive of each device maintenance overcurrent protection processing method, when starting a liter of speed on the trip, which is a very serious overcurrent The phenomenon, mainly to check ① ② stuck working machine there is no short maintenance load side of the inverter, using a megger on the ground there is no short-circuit power inverter module ③ ④ there is no damage motor starting torque is too small, mopping 2 servo system not turn up, do not immediately start when tripped, and tripped during operation, the main check ① raising speed time setting is too short, longer acceleration time ② Deceleration time setting too short, lengthen the deceleration time ③ torque compensation ( U / F ratio) is set too large, space-time caused by low-frequency load current is too large electronic thermal relay setting ④ Siemens improper maintenance inverter, the operating current is set too small, causing the drive malfunction on China Shenyang Electric Co., Ltd. to undertake industrial automation control system design, installation, engineering and maintenance; professional maintenance States converter, DC governor, PLC programmer repair operations. Company to market-oriented, technology and development, quality of survival. The company has a sound management system, advanced testing and inspection test equipment, with large-scale maintenance entity, truly provide customers with the best quality service. DC maintenance inverter | Shen Electric (certified) | on the people servicing the drive from Shenyang Electric Limited. Shenyang on China Electric Co., Ltd. (www.zsmsy.com) is Shenyang, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. On Shen Electrical leadership with the staff warmly welcome all inquiries negotiations to create a better future for electric Shen.