77-964-2300 变频器面板

1C31161G02
1C31113G05
DSQC377B
6SL3225-0BE33-0AA0
8939-HN
8C-PCNT01
TCLLMUX2-32PTMUX
SGDH-30DE-OY
2711P-T6C20D8
2711-T5A5L1

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描述

变频器面板无任何显示,有时能开机正常运行,断电后有时不能启动3~380电源有查所有保险完好,其电源板MEC-40V-O无指示,脱开此版,当用表测试时R2电阻时可以启动控制电路开关电源,输出各组电源均正常,分析是由于该电阻变值(增大)引起开关管激励电流不足,从而引起开关电源无法起振从而无控制电压输出,,用220Ω的1W电阻代换后上机正常。检修上述故障可用通用检修开关电源的方法,断开负载,接上假负载调到正常输出电压后再接入控制回路中,以免电压过高烧坏控制模块。造成不必要的损失

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