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 housing maintenance inverter election Which can be made to 50 ℃) inverter internal temperature is higher than 10 ~ 20 ℃ ambient temperature * When installed in closet, Be sure to pay attention to the volume of the cabinet, the position of the inverter air volume exhaust fan. * 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. After partial drying circuit board connectors, insulation will decline, may cause malfunction. ③ conductive dust, oil mist, corrosive gas, although the circuit board from dust and moisture has been processed, 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 entry - The quality of the light emitting diode emitting diode test test good or bad, can follow the test ordinary silicon diode test positive and negative resistance method. Refers to the bell multimeter dial in R * 100 or R * 1K file, then the light emitting diode anode with a black pen, red pen then negative, the measured forward resistance should be 20 = 40K; then the light emitting diode cathode with black pen, red pen then positive, measured reverse resistance should be greater than 500K or more. Diode-speed dial in using a digital multimeter, black pen then the positive light-emitting diode, the red pen then negative how maintenance inverter, resistance is infinite. Black pen then negative light emitting diode maintenance inverter Which is good, the red pen then positive, there will be micro-light emitting diodes indicate normal. abb maintenance inverter | West District maintenance converter | Shen Min electrically by the Shenyang Electric Co. on offer. Shenyang Electric Co. on people (www.zsmsy.com) strong, credible, and other industries in other Shenyang, Liaoning province has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead sink into the brilliant electric and you work for a better future!