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三民的(de)混(hun)凝土輸送泵在(zai)啟動時的(de)故障是主電機(ji)啟動不(bu)轉，且(qie)伴有嗡嗡聲，一(yi)般為電源缺相導(dao)致的(de)。

有(you)兩方(fang)面(mian)原因，一(yi)是終端(duan)繼電(dian)(dian)(dian)器，故(gu)障一(yi)般為(wei)線圈燒壞(huai)(huai)或觸點燒壞(huai)(huai)，使其觸點不能正常閉合，脫(tuo)開。二(er)是電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)，三民(min)混凝(ning)土輸送(song)泵有(you)二(er)個電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)，電(dian)(dian)(dian)液換向閥上兩電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)YV1、YV2控制(zhi)泵機(ji)的(de)正反(fan)泵，其故(gu)障判定方(fang)法如下：接(jie)通控制(zhi)電(dian)(dian)(dian)源，取掉電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)端(duan)部的(de)橡皮套，用(yong)手(shou)將電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)芯向里推，然后旋轉(zhuan)對(dui)應的(de)操作(zuo)按鈕，說(shuo)明該電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)對(dui)面(mian)的(de)電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)燒壞(huai)(huai)，或是旋轉(zhuan)點動按鈕對(dui)應的(de)電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)就有(you)響聲。