正確的(de)接(jie)線及參數(shu)設置(zhi)。在安(an)裝變(bian)頻器之前一定要熟讀其手冊，掌握(wo)其用(yong)法、注意事項和接(jie)線;安(an)裝好后，再根據使(shi)用(yong)正確設置(zhi)參數(shu)。

環(huan)境溫(wen)度(du)對變頻器(qi)的(de)使用壽(shou)命有很大的(de)影響。環(huan)境溫(wen)度(du)每升10℃，則變頻器(qi)壽(shou)命減半，所以周圍環(huan)境溫(wen)度(du)及變頻器(qi)散(san)熱(re)的(de)問題一定要解決(jue)好。

V/F控(kong)制屬于恒(heng)轉(zhuan)矩(ju)調整。而矢量控(kong)制使電(dian)機的輸出轉(zhuan)矩(ju)和電(dian)壓的平方(fang)成正比的增加，從而改善電(dian)機在低速時的輸出轉(zhuan)矩(ju)。

若系統(tong)采用工頻/變(bian)頻切(qie)(qie)換方式(shi)運行，工頻輸出(chu)與變(bian)頻輸出(chu)的互鎖要(yao)可靠。而且開停(ting)泵、工頻/變(bian)頻切(qie)(qie)換都要(yao)停(ting)變(bian)頻器，再操作接觸器。由于觸點粘(zhan)連(lian)及(ji)大容量接觸器電弧的熄滅需(xu)要(yao)一定時間，上述切(qie)(qie)換的順序(xu)、時間要(yao)考慮周全。

外部控制信號失效的(de)問題(ti)。一般是幾種情(qing)況：信號模式不正(zheng)確、端子(zi)接線錯誤、參數(shu)設置不正(zheng)確或(huo)外部信號自身(shen)有問題(ti)。

注意(yi)轉速與(yu)揚(yang)程的關(guan)系。電機的選擇及其(qi)最佳工(gong)作段(duan)是比較重要的問(wen)題(ti)。如果變頻器長時間運行在5HZ以(yi)下，則(ze)電機發熱成了突出(chu)問(wen)題(ti)。

過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)跳(tiao)閘(zha)和過(guo)載跳(tiao)閘(zha)的區別。過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)主(zhu)要用于保(bao)(bao)(bao)護變(bian)頻(pin)器(qi)，而(er)過(guo)載主(zhu)要用于保(bao)(bao)(bao)護電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)。因為變(bian)頻(pin)器(qi)的容量有時需要比電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)的容量加大一擋或兩擋，這種情況下，電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)過(guo)載時，變(bian)頻(pin)器(qi)不一定(ding)(ding)過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)。過(guo)載保(bao)(bao)(bao)護由變(bian)頻(pin)器(qi)內(nei)部的電(dian)(dian)(dian)(dian)(dian)(dian)子熱(re)保(bao)(bao)(bao)護功能(neng)進行，在預置(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)子熱(re)保(bao)(bao)(bao)護時，應該準(zhun)確(que)地(di)預置(zhi)“電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)取用比”即電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)額(e)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)和變(bian)頻(pin)器(qi)額(e)定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)之比的百分。