LENZE Lenze inverter maintenance
Fault: OC is the over current alarm of the frequency converter
Fault analysis: common faults Lentz switching power supply pulse transformer is damaged or damaged, OC overcurrent detection is usually accomplished by Hall sensor, the current detection of U V phase, and then by the two input or gate circuit to determine whether COMOS inverter overcurrent. The failure point of OC is usually caused by the damage of sensor and the damage of gate circuit. The hall sensor is easily affected by the environment, and the drift of work point occurs, and the gate circuit is often damaged by the working voltage and the impact of input signal. First, it should be checked whether the power module is damaged or not, and the driving waveform is normal. It is found that the driving circuit V phase has no voltage. The circuit drive power supply for the switch power check is not supplied directly by the switching power supply, and the drive circuit and the switching power supply are isolated. Check the isolation transformer to find damage. After the replacement, the power supply of the drive circuit is determined.  After the replacement of the V phase, the failure is eliminated.  Power supply to the frequency converter, open, output voltage balance, load to the rated current normal work of the frequency converter repair. So the inverter is the drive circuit that causes OC. Load test run for 1 days.
Hong Jia Wei maintenance troubleshooting of LENZE Lenze inverter: no display, lack of phase, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter error, output module, display without damage, replacement parts etc..

Jia Hongwei maintenance service hotline: 0755-28916839, 13640994287 Mr. Shaw