Frequency converter maintenance of Kobe F5 injection molding machine

Model: keb-f5-30kw

Fault: e.up alarm

Fault analysis: the customer‘s response is to give an alarm when starting up. This alarm is undervoltage. Disassemble the frequency converter, check the rectifier module and inverter module of the frequency converter, and test that the diode has good characteristics. Power on the frequency converter and display e.up. According to the fault measurement, each working voltage is normal. It is preliminarily judged that the voltage detection circuit is abnormal. Replace the detection thick film to power on the frequency converter. Start up and output voltage are balanced. When the load is up to the rated current, the heating of the frequency converter is also normal. The frequency converter is repaired. Therefore, the frequency converter is caused by the bad thick film of the voltage detection circuit. Normal operation after 1 day.

JiaHongWei can repair KEB frequency converter series: f4-s f4-c f4-f M4 R4 f5-a f5-m f5-s frequency converter. JiaHongWei can repair common faults of KEB frequency converter: no display, phase loss, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter error, display output, module damage, replacement of accessories, etc