7300PA 37kW變頻器,上電即跳OH過(guò)熱故障,拒絕起動(dòng)操作。模塊溫度檢測(cè)為
常閉觸點(diǎn)型溫度繼電器,由8CN端子接人電源/驅(qū)動(dòng)板。
將8CN端子用鑷子短接.按操作面板R ST鍵復(fù)位后,能起動(dòng)運(yùn)行。測(cè)量溫度傳感器引線,
內(nèi)部觸點(diǎn)已呈開(kāi)路狀態(tài)。用一市售75℃常閉觸點(diǎn)型溫度繼電器代換后,故障修復(fù)。
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