，维修了不少EV-ECD01-4T0150、EV-ECD01-4T0110电梯变频器，多数是烧坏制动模块APT60GF120其驱动电路！有时整流模块及充电电阻也烧坏了，本身性能不好是其主要原因，另有一个原因是运行接触器触点打火，电压波动大，所以要以经常检查这接触器，定期清洗其触点，但这个很多电梯保养公司都没有做到
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