[维修案例] 变频挂机接线座短路导致E1故障维修案例

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一、机器型号:

KFR-35GW/BP2DN1Y-DA400(B3)

二、故障现象:

开机运行几分钟,内机停机的现象,内机不报故障,用检测小板检测报E1通讯故障。

三、检修过程

  • 步骤1:将外机板连接变频检测仪,变频检测仪显示频率为0,显示通讯故障。

  • 步骤2:用变频检测仪进行通讯故障检测,首先检测外机显示通讯正常,判定故障点在内机,随即用变频检测仪检测内机通讯,显示内机通讯故障,判定故障点在内机或者连接线。
  • 步骤3:用万用表测量N-S电阻为无穷大,N-S电压在50-70之间跳变,判定故障可能在内机板拆开内机板查看没有发现有虚焊及元器件烧坏的现象。

  • 步骤4:联机准备重新试机,拧接线座螺钉时发现通讯线的螺钉和L、N线的固定螺钉不一样,随即拆下接线座发现螺钉把接线座打穿了,螺钉接触到了固定接线座的钣金。

四、处理措施

更换螺钉重新试机,运行半小时一切正常。

五、注意事项

1、安装时一定要注意,任何一点失误都会可能会造成新机故障,引起退机或者投诉,特别时螺丝钉这种安装维修时经常丢失的小件东西,随身多准备些不同型号的,以防出现意外。

2、维修时务必仔细检测,一步一步进行排除,维修时会出现很多想不到问题,特别时碰到疑难问题时,更加要仔细检查,问题往往会出现在不起眼之处。


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