Inverter repair
Model: CHF100-45KW
Failure phenomenon: running OC alarm
Fault analysis: according to the fault detection module and the power supply voltage is normal, excluding CPU motherboard problem focuses on the detection of the driving circuit, driving circuit using PC929 drive circuit in a static state, relative to the +5V power supply terminal, PC929 2, 3 pin voltage is 5V, the direct measurement of 2, 3 feet between the voltage difference is 0V the driving power for OV; O potential reference point, CN1 trigger 1 line lead terminals should be -10V. The neutral point voltage of the pulse output pin of PC923, PC929 and post amplifier is -10V. Detection of CN1 terminal of the 1 line is OV, the fault reason is A, the power supply voltage regulator diode breakdown short circuit; B, the gate resistance R91 open circuit. Detection of CN1 terminal of the 1 line is about +18V, the power measurement of the voltage found V phase voltage anomalies, the replacement of PC929 after the lifting of the fault.
Hong Jia Wei maintenance - professional inverter repair, maintenance of servo controller, servo driver, driver module, inverter repair Goodrive300, CHF, CHE, CHV, G9 series of common faults: no display, lack of phase, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter errors and display no, the output module is damaged, error; the company complete accessories, professional maintenance engineers, detected by the test software with servo motor testing to ensure the quality of maintenance. Professional maintenance, module deep fried, the output voltage is low, the red light is bright, no show, lack of phase, accessories complete, the price is reasonable.
Jia Hong Wei maintenance hotline: 07552891683913640994287 Shaw