走出制冷维保的误区......

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    inkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; font-size: 15px; letter-spacing: 1px; text-align: justify; widows: 1;&quot;&gt;冷库压缩机不启动，多是电动机和电气控制方面出现故障.检修时既要检查各类电气控制元件，又要检查电源及连接线路。 inkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; font-size: 15px; letter-spacing: 1px; text-indent: 0px; widows: 1; text-align: justify; box-sizing: border-box !important; word-wrap: break-word !important;&quot;&gt;portant; word-wrap: break-word !important;&quot;&gt;① 电源线路故障故障分析：portant; word-wrap: break-word !important;&quot;&gt;压缩机不启动，一般先从电源线路上查找，如电源熔断器熔断或接线松脱、断线造成缺相，或电源电压过低等.排除方法：portant; word-wrap: break-word !important;&quot;&gt;电源缺相时电动机发出“嗡嗡”交流声而不启动.时间稍长热继电器动作，触点跳开。portant; word-wrap: break-word !important;&quot;&gt;可用万用表交流电压挡检查熔断器是否熔断或测量电像电压大小，若熔断器熔断，则更换适当容量熔断器。 inkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; font-size: 15px; letter-spacing: 1px; text-indent: 0px; widows: 1; text-align: justify; box-sizing: border-box !important; word-wrap: break-word !important;&quot;&gt;portant; word-wrap: break-word !important;&quot;&gt;排除方法：portant; word-wrap: break-word !important;&quot;&gt;用万用表检查电动机接线柱与外壳是否短路，并测量各相电阻值，如是短路或某相电阻小，说明绕组匝间短路，绝缘被烧毁。portant; word-wrap: break-word !important;&quot;&gt;检杳时也可用绝缘电阻表洲其绝缘电阻，若其电阻接近于零，则说明绝缘层己被击穿.如电动机烧毁，可拆换电动机。 inkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; font-size: 15px; letter-spacing: 1px; text-indent: 0px; widows: 1; text-align: justify; box-sizing: border-box !important; word-wrap: break-word !important;&quot;&gt;portant; word-wrap: break-word !important;&quot;&gt;② 电动机烧毁或匝间短路故障分析：portant; word-wrap: break-word !important;&quot;&gt;当电动机绕组烧毁或匝间短路时，往往会出现熔断器反复熔断的现象，特别是一推上闸刀开关时就熔断，对于开启式压缩机，此时可闻到电动机里传出的漆包线烧焦的臭味。 inkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; font-size: 15px; letter-spacing: 1px; text-indent: 0px; widows: 1; text-align: justify; box-sizing: border-box !important; word-wrap: break-word !important;&quot;&gt; &nbsp;inkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; font-size: 15px; letter-spacing: 1px; text-indent: 0px; widows: 1; text-align: justify; box-sizing: border-box !important; word-wrap: break-word !important;&quot;&gt;portant; word-wrap: break-word !important;&quot;&gt;排除方法：portant; word-wrap: break-word !important;&quot;&gt;热继电器触点跳开时，首先应检查其整定电流是否合适，并按下人工复位按钮，若启动压缩机后不跳开，则应查出引起过电流的原因，修复后方可重新按下复位按钮。portant; word-wrap: break-word !important;&quot;&gt;发热电阻丝烧断时，应更换热继电器。

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