常(chang)見故障分析1、通電源開機(ji)(ji)后，控(kong)(kong)制(zhi)面板(ban)顯示正常，降溫(wen)風扇工(gong)(gong)作正常，按下啟動鍵時，中間繼電器工(gong)(gong)作，離心(xin)機(ji)(ji)不(bu)工(gong)(gong)作。根據故(gu)障(zhang)(zhang)現象分(fen)析，電源部分(fen)和控(kong)(kong)制(zhi)部分(fen)應(ying)該正常，故(gu)障(zhang)(zhang)應(ying)該在控(kong)(kong)制(zhi)板(ban)到(dao)電機(ji)(ji)的線路(lu)、碳(tan)(tan)刷(shua)(shua)(shua)和電機(ji)(ji)處(chu)。打開離心(xin)機(ji)(ji)，用(yong)萬用(yong)表測量(liang)控(kong)(kong)制(zhi)板(ban)到(dao)碳(tan)(tan)刷(shua)(shua)(shua)處(chu)線路(lu)導(dao)(dao)通，再測量(liang)碳(tan)(tan)刷(shua)(shua)(shua)到(dao)電機(ji)(ji)轉子(zi)(zi)時不(bu)導(dao)(dao)通，仔細觀察碳(tan)(tan)刷(shua)(shua)(shua)與電機(ji)(ji)轉子(zi)(zi)接觸(chu)不(bu)良(liang)，拆下碳(tan)(tan)刷(shua)(shua)(shua)發(fa)現由于使用(yong)時間過長(chang)，太短造成。更(geng)換新(xin)的碳(tan)(tan)刷(shua)(shua)(shua)，故(gu)障(zhang)(zhang)排(pai)除。這種故(gu)障(zhang)(zhang)為離心(xin)機(ji)(ji)常見故(gu)障(zhang)(zhang)，要定(ding)期更(geng)換碳(tan)(tan)刷(shua)(shua)(shua)，以免發(fa)生以上故(gu)障(zhang)(zhang)。
2、通電(dian)(dian)(dian)(dian)源開機后(hou)(hou)，控(kong)(kong)(kong)制(zhi)(zhi)(zhi)面板顯示正常(chang)，降溫風扇工(gong)(gong)作(zuo)正常(chang)，按下啟動鍵時，中間(jian)繼電(dian)(dian)(dian)(dian)器(qi)不工(gong)(gong)作(zuo)，離心機不工(gong)(gong)作(zuo)。根據故障現象(xiang)分(fen)析，電(dian)(dian)(dian)(dian)源部分(fen)應(ying)該正常(chang)，故障應(ying)該在(zai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板和(he)到電(dian)(dian)(dian)(dian)機的(de)線路(lu)、碳(tan)刷(shua)和(he)電(dian)(dian)(dian)(dian)機處(chu)(chu)。打開離心機，用萬用表(biao)測(ce)量控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板到碳(tan)刷(shua)處(chu)(chu)線路(lu)導(dao)(dao)通，再測(ce)量碳(tan)刷(shua)到電(dian)(dian)(dian)(dian)機轉子也導(dao)(dao)通，測(ce)量電(dian)(dian)(dian)(dian)機線圈正常(chang)。開機后(hou)(hou)，用萬用表(biao)測(ce)量控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板到電(dian)(dian)(dian)(dian)機的(de)導(dao)(dao)線無(wu)電(dian)(dian)(dian)(dian)壓輸出，可判斷故障應(ying)在(zai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板上，其(qi)中中間(jian)繼電(dian)(dian)(dian)(dian)器(qi)不工(gong)(gong)作(zuo)，故障應(ying)在(zai)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)中間(jian)繼電(dian)(dian)(dian)(dian)器(qi)的(de)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)路(lu)上，逐一(yi)排除，發(fa)現控(kong)(kong)(kong)制(zhi)(zhi)(zhi)板上C9013三(san)極(ji)管擊穿，更壞(huai)新(xin)的(de)C9013三(san)極(ji)管，故障排除。
3、通電(dian)源(yuan)開機(ji)后，控(kong)制(zhi)面板顯示正(zheng)(zheng)常，按下(xia)啟動鍵時(shi)，離心機(ji)工(gong)作(zuo)正(zheng)(zheng)常。但按停(ting)(ting)(ting)止(zhi)(zhi)(zhi)開關時(shi)，離心機(ji)無反映，不(bu)能停(ting)(ting)(ting)止(zhi)(zhi)(zhi)工(gong)作(zuo)。根(gen)據(ju)故障現象分(fen)析(xi)，故障應該在(zai)控(kong)制(zhi)電(dian)路部分(fen)中的停(ting)(ting)(ting)止(zhi)(zhi)(zhi)控(kong)制(zhi)部分(fen)，其(qi)包括停(ting)(ting)(ting)止(zhi)(zhi)(zhi)開關、電(dian)源(yuan)控(kong)制(zhi)板及計時(shi)器控(kong)制(zhi)板。打開離心機(ji)，用萬用表檢測(ce)停(ting)(ting)(ting)止(zhi)(zhi)(zhi)開關，為(wei)正(zheng)(zheng)常； 開機(ji)后測(ce)量(liang)電(dian)源(yuan)控(kong)制(zhi)板輸出到計時(shi)器控(kong)制(zhi)板信號為(wei)交流16V正(zheng)(zheng)常，故障應在(zai)計時(shi)器控(kong)制(zhi)板上，計時(shi)器控(kong)制(zhi)板得到停(ting)(ting)(ting)止(zhi)(zhi)(zhi)信號不(bu)能執(zhi)行停(ting)(ting)(ting)止(zhi)(zhi)(zhi)任務。逐一排(pai)(pai)除(chu)，發(fa)現計時(shi)器控(kong)制(zhi)板上C9013三(san)極管和型號為(wei)16V，470μF的電(dian)容(rong)擊(ji)穿，更壞(huai)新的三(san)極管和電(dian)容(rong)，故障排(pai)(pai)除(chu)。
4、通電(dian)(dian)(dian)源開(kai)機后(hou)，控(kong)制(zhi)面(mian)板(ban)顯示正常(chang)，按(an)下啟動(dong)鍵時，離(li)心機工作(zuo)正常(chang)。但按(an)停(ting)(ting)止(zhi)開(kai)關時，離(li)心機不能馬上停(ting)(ting)止(zhi)工作(zuo)，而是旋轉好(hao)長時間(jian)才慢慢停(ting)(ting)下來。根(gen)據故(gu)障(zhang)現象(xiang)分析，故(gu)障(zhang)應該(gai)在控(kong)制(zhi)電(dian)(dian)(dian)路部分中(zhong)(zhong)的停(ting)(ting)止(zhi)制(zhi)動(dong)控(kong)制(zhi)部分，其制(zhi)動(dong)控(kong)制(zhi)部分包括型(xing)號(hao)為：WJ176-12V中(zhong)(zhong)間(jian)繼電(dian)(dian)(dian)器、剎車(che)電(dian)(dian)(dian)阻R：20－30Ω、型(xing)號(hao)為：KBPC50A10M硅(gui)(gui)堆和導(dao)線。打開(kai)離(li)心機，用(yong)萬用(yong)表(biao)測量(liang)剎車(che)電(dian)(dian)(dian)阻、中(zhong)(zhong)間(jian)繼電(dian)(dian)(dian)器及導(dao)線均為正常(chang)，開(kai)機后(hou)，按(an)停(ting)(ting)止(zhi)鍵后(hou)用(yong)萬用(yong)表(biao)測量(liang)硅(gui)(gui)堆4角(jiao)，有交流12V輸入，無直流12V輸出，判(pan)斷(duan)該(gai)硅(gui)(gui)堆壞，更(geng)換新(xin)的，故(gu)障(zhang)排除。
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