描述
1、OC報警:鍵盤面板LCD顯示:加、減、恒速時過電流。
對于短時間大電流的OC報警,一般情況下是驅(qū)動板的電流檢測回路出了問題,模塊也可能已受到?jīng)_擊(損壞),有可能復(fù)位后繼續(xù)出現(xiàn)故障,產(chǎn)生的原因基本是以下幾種情況:電機電纜過長、電纜選型臨界造成的輸出漏電流過大或輸出電纜接頭松動和電纜受損造成的負(fù)載電流升高時產(chǎn)生的電弧效應(yīng)。
小容量(7.5G11以下)變頻器的24V風(fēng)扇電源短路時也會造成OC3報警,此時主板上的24V風(fēng)扇電源會損壞,主板其它功能正常。若出現(xiàn)“1、OC2”報警且不能復(fù)位或一上電就顯示“OC3”報警,則可能是主板出了問題;若一按RUN鍵就顯示“OC3”報警,則是驅(qū)動板壞了。
2、OLU報警:鍵盤面板LCD顯示:變頻器過負(fù)載。
當(dāng)G/P9系列變頻器出現(xiàn)此報警時可通過三種方法解決:首先修改一下“轉(zhuǎn)矩提升”、“加減速時間”和“節(jié)能運行”的參數(shù)設(shè)置;其次用卡表測量變頻器的輸出是否真正過大;最后用示波器觀察主板左上角檢測點的輸出來判斷主板是否已經(jīng)損壞。
3、OU1報警:鍵盤面板LCD顯示:加速時過電壓。
當(dāng)通用變頻器出現(xiàn)“OU”報警時,首先應(yīng)考慮電纜是否太長、絕緣是否老化,直流中間環(huán)節(jié)的電解電容是否損壞,同時針對大慣量負(fù)載可以考慮做一下電機的在線自整定。另外在啟動時用萬用表測量一下中間直流環(huán)節(jié)電壓,若測量儀表顯示電壓與操作面板LCD顯示電壓不同,則主板的檢測電路有故障,需更換主板。當(dāng)直流母線電壓高于780VDC時,變頻器做OU報警;當(dāng)?shù)陀?50VDC時,變頻器做欠壓LU報警。
4、LU報警:鍵盤面板LCD顯示:欠電壓。
如果設(shè)備經(jīng)?!癓U欠電壓”報警,則可考慮將變頻器的參數(shù)初始化(H03設(shè)成1后確認(rèn)),然后提高變頻器的載波頻率(參數(shù)F26)。若E9設(shè)備LU欠電壓報警且不能復(fù)位,則是(電源)驅(qū)動板出了問題。
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