西威SIEI变频器常见故障：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、模块损坏等；***Y2055-KBLA******Y2075-KBLA******Y3110-KBLA******Y3150-KBLA******Y4185-KBLA******Y4221-KBLA******y4301-KBLA******Y4370-KBLA******Y5550-KBLA******Y5450-KBLA******O3150-KBLA******Y6750-KBLA******Y2055-KBLM***Y2075-KBLM***O2055-KBLM***Y4185-KBLM***Y3150-KBLM***Y4221-KBLM***O5550-KBLM***O3075-KBLM***O3110-KBLM***O3130-KBLBR4***Y6750-KBLBR4***Y5450-KBLBR4***Y5550-KBLBR4***Y4301-KBLBR4)