G3600 Engines Caterpillar


Coolant Level Is Low

Usage:

G3606B 4ZS
使用该步骤对冷却液液位低进行故障诊断与排除。 在以下任一事件码为激活状态时使用本步骤。 有关事件代码和这些代码的默认触发点的信息,请参阅故障诊断与排除, "事件代码"。 必须进入 Caterpillar ET(Electronic Technician,电子技师)的监控系统才能查看这些代码的当前触发点。

表 1
事件代码    
说明     激活代码的条件     系统响应    
E386(1)发动机冷却液液位低或发动机机油油位低     发动机冷却液液位和发动机机油油位的开关输入被激活。     将会记录该代码。 如果发出警告,警报输出被激活。 如果发出关停信号,关停输出被激活。    
E386(3)发动机冷却液液位低或发动机机油油位低    

可能原因

  • 发动机冷却液液位低

  • 电气连接或接线有故障

  • 冷却液液位开关有故障

建议的措施

发动机冷却液液位低

检查冷却液液位。 必要时添加冷却液。

通常发动机不消耗任何冷却液。 检查冷却系统是否泄漏。

如果没有发现外部泄漏且冷却液液位不能保持,可能有内部泄漏。

如有必要,进行维修。

电气连接或接线

电气连接或接线可能有故障。 彻底检查电气接头和开关的所有接线。 请参阅故障诊断和排除, "电气接头 - 检查"及发动机的电路图。 如有必要,进行维修。

测试开关

冷却液液位开关必须关闭,以便发动机运转。 开关正常断开。 开关必须浸没在液体中才能关闭。

断开开关,卸下开关。

将欧姆表连接到开关端子,测量通路。 开关正常打开时正确通路(连续性)电阻大于 20000 欧姆。

继续监测欧姆表,将开关浸没在水中。 开关关闭时正确通路(连续性)电阻小于 5 欧姆。

如果没有得到正确的结果或如果开关没有关闭,更换开关。

如果得到正确的结果,电气连接或接线可能存在开路。 使用欧姆表测量接线的电阻。 请参阅发动机的电路图。 如有必要,进行维修。

注: 冷却液液位开关可由客户提供。

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