泰州日立变频器维修/泰州变频器维修/日立变频器维修/变频器维修|泰州维修日立变频器
一:日立变频器维修型号(只列出一部分):3G3RV-A2007 3G3RV-A2015 3G3RV-A2022 3G3RV-A4015 3G3RV-A4022 3G3RV-A4037 3G3RV-A4055 3G3RV-A4075 3G3RV-A4075 3G3RV-A4110 3G3RV-A4110 3G3RV-A4150 3G3RV-A4150 3G3RV-A4185 3G3RV-A4185 3G3RV-B211K 3G3RV-B2220 3G3RV-B2300 3G3RV-B2370 3G3RV-B2450 3G3RV-B2550 3G3RV-B2750 3G3RV-B411K 3G3RV-B411K 3G3RV-B413K 3G3RV-B416K 3G3RV-B416K 3G3RV-B4220 3G3RV-B4220 3G3RV-B4300 3G3RV-B4370 3G3RV-B4370 3G3RV-B4450 3G3RV-B4450 3G3RV-B4550 3G3RV-B4550 3G3RV-B4750 3G3RV-B4750 3G3RV-B4900 3G3RV-B4900 3G3RV-PDRT2 3G3RV-PFS5972-10-07 3G3RV-PFS5972-130-35 3G3RV-PFS5972-18-07 3G3RV-PFS5972-35-07 3G3RV-PFS5972-60-07 3G3RV-PFS5972-70-52 3G3RV-PFS5973-100-07 3G3RV-PFS5973-130-35 3G3RV-PFS5973-160-40 3G3RV-PFS5973-240-37 3G3RV-PFS5973-35-07 3G3RV-PFS5973-60-07 3G3MZ-A2004 3G3MZ-A2004 3G3MZ-A2007 3G3MZ-A2007 3G3MZ-A2015 3G3MZ-A2015 3G3MZ-A2022 3G3MZ-A2037 3G3MZ-A2055 3G3MZ-A2075 3G3MZ-A4004 3G3MZ-A4007 3G3MZ-A4015 G3MZ-A4022 3G3MZ-A4022 3G3MZ-A4007 3G3MZ-A4015 G3MZ-A4022 3G3MZ-A4022
二:变频维修常见故障:无显示、缺相、过流、过压、欠压、过热、过载、接地、参数错误、有显示无输出、模块损坏、更换配件等
三:我司有大量日立变频器维修主板、控制板、电源板、整流模块、功率模块、操作器、三线散热风扇等,有全新的、有拆机的,规模大、品种齐、价格低。
四:日立变频器维修实例
日立变频器维修实例一:7。5KW
故障现象:显示POFF(欠压故障)
故障分析:接入直流电源电压,面板上没有显示POFF(欠压故障),只有上交流测试了,测量三相相正常,直流母线电压也正常。这属于一种假欠压故障,问题可能出在板上的电压检测保护电路。首先检查电压取样电阻,测量三个电阻基本上未变化,查一个C46电容有较严重的漏电现象。
故障原因:日立变频器采用了电阻分压式,C46并联在R36上,电容在这里主要是起缓冲变化作用,由于电容老化有漏电现象,这就相当于给电阻再并联了一个电阻,使取样电压减小,出现了欠压故障。 |
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