Longmen crane vertical Yaskawa inverter maintenance
Model: H1000-110KW
Failure phenomenon: the rise can fall "OU" alarm
Fault analysis: Yaskawa inverter on the jack industry application is very mature, the rise of inverter operating normally, but the decline in the operation, the brake contactor, brake open. The brake contactor is controlled by inverter action brake release command, running instructions in inverter output. Static measurement of the transducer was first found that the IGBT module was normal, the rectifier part and the others were all normal. It is normal to measure the driving waveform with an oscilloscope. By measuring the basic judgment motherboard and power are normal. When running down the emergency stop and found that the DC voltage is too high up to 730V inverter alarm. In the inspection found that the external braking unit is working properly. Disassemble the transducer to measure the damage of the brake circuit, and the measuring current with load is basically normal. Up and down are working properly. Delivery to customers for more than two months also did not have customer response problems. Fault repair.
Common fault repair Longmen Jiahong Serena vertical crane Yaskawa inverter: no display, lack of phase, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter error, output module, display no damage, error; Jia Hongwei complete accessories, professional maintenance engineers, test with the load test to ensure the quality of maintenance.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw