升降貨梯http://m.iyunsun.com/在運行中往往會出現單相運行，其故障表現為：升降貨梯接觸器在工作中常常由于電源電壓過低或波動過大、觸頭上有油污或粉塵、表面高低不平、可動銜鐵不吸合或吸合不完全、觸頭粘連或可動銜鐵不釋放、觸點不斷開、觸點不閉合、時斷時合等，有時還會出現電氣控制回路電壓過低或機械卡阻，致使升降貨梯接觸器吸合過程中有停滯現象，歸納起來這些失效形式可以分為粘連、卡死、斷相等幾種。
Cargo lifter often appear in the operation of single-phase operation, the breakdown as follows: Huoti contacts at work is often due to fluctuations in the power supply voltage is too low or too high, there is oil or dust on the contact surface uneven, movable armature do not pull or pull incomplete contact adhesions or movable armature not release, contact constantly open, not closed contact when off when you close, and sometimes there will be low voltage electrical control circuit or mechanical jamming, resulting in cargo lifter contactor pull in the process of stagnation, summed up these failure modes can be divided into adhesions, stuck, broken several equally.

其次，升降貨梯http://m.iyunsun.com/線路連接松動不可靠、電動機因過載過熱、斷相、三相不平衡等，此類故障危害，極易造成升降貨梯逆行。
Secondly, loose cargo lifter line connection is not reliable, motor overheat due to overload, phase failure, phase imbalance, such failures harm, can easily cause retrograde cargo lifter.