Common reasons: May be the start wire has wrong contact, or have fray and break.
常见原因：可能是启动器的搭线出现了虚假接触，或者出现磨损或损坏的情况。
youdao
Not easy break off the wire due to low conductivity.
导电率低，线切割时不易断线。
应用推荐
模块上移
模块下移
不移动