Toshiba inverter repair
Model: VF-S9
Fault: boot display "UC" alarm
Failure analysis: under pressure is also a problem we often encountered in maintenance. Mainly because the main circuit voltage is too low (less than 200V 220V series, 380V series of less than 400V), the main reason: three road, a road bridge rectifier thyristor is damaged or is not working properly, are likely to lead to less compressive failure, then the main circuit contactor damage, resulting in the DC voltage loss in charge the resistance above may cause undervoltage. There is a voltage detection circuit fault and undervoltage problem. According to the field measurement, the AC contactor can work normally. The measurement of the DC bus voltage 480V is normal, which indicates that the starting circuit and the power supply voltage are all normal. Preliminary judgment for the power supply voltage detection circuit fault. In the measurement found that the voltage detection of the voltage resistance 470K damage.
Fault repair: replacement of the voltage detection resistor power through the operation of the lifting of the fault.
Common fault repair Toshiba inverter: no display, lack of phase, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter error, output module, display no damage, error; Hong Jia Wei complete accessories, professional maintenance engineers, detected by the test software with servo motor to ensure the maintenance of test quality.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw