(1)首先檢查電網電壓是否過低
，起動轉矩與電壓平方成正比，加速轉矩克服不了負載力矩，達不到運行轉速

，應適當提高電網電壓。 
(2)其次檢查電源熔絲是否燒斷，如果斷一相
，則電動機單相起動，起動轉矩為零，電動機不能轉動
，應更換足夠的熔絲. 
(3)負fu載zai過guo大da或huo傳chuan動dong棚peng械xie有you故gu障zhang一yi般ban電dian動dong葫hu蘆lu匹pi配pei電dian動dong機ji功gong率lv是shi合he理li的de，起qi吊diao重zhong物wu不bu能neng過guo載zai
，倘tang若ruo出chu現xian電dian動dong葫hu蘆lu不bu能neng轉zhuan動dong
，先xian卸xie掉diao載zai荷he，如ru電dian動dong機ji能neng正zheng常chang起qi動dong，說shuo明ming減jian速su箱xiang等deng傳chuan動dong機ji構gou有you故gu障zhang

，應ying檢jian查zha被bei拖tuo動dong機ji構gou，清qing除chu故gu障zhang。 (
4)定子繞組相間短路
、jiedihuoduanlu，raozujiedidangchuxianzaiyinchuxianjiedibanchu
，yingdakaijiexianhejianzha。duanlushibudanjianzhadianji，haiyingshouxianjianzhakongzhishebeijiexianshifouzhengque，ruguoshijiaoliujiechuqichutoujiechubuliangzaochengxianlubunengjietong，yingyongshazhijiangjiechuqichutoubanhenmoping
，tongshiyeyaojianzhatiexinxihejiduankaiqingkuang，youwukazuxianxiang，biyaoshigenghuanjiechuqi。