C280 Marine Engines Caterpillar


DEF Pump Power Supply - Test

Usage:

SCR EF5
使用此步骤对柴油机排气处理液 (DEF) 泵电源故障进行故障诊断与排除。 如果以下诊断代码为激活状态或易于重复,也采用本步骤。

表 1
J1939 代码和描述  注释 
7417-2
后处理 #1 DEF 控制器:不稳定、间歇或不正确 
发动机运转时,120 VAC 断路器断开。 

表 2
故障诊断与排除测试步骤  数值  结果 

1. 检查代码

A. 连接 Cat® 电子技师 (ET) 与维修工具接头。

B。 确定是否有代码激活或记录。
 

代码
 

结果:代码激活或被记录。

转至测试步骤 2。
 

2. 检查喷射机柜上的 AC 断路器

A. 拆下喷射机柜面板,以检修 AC 柴油机排气处理液 (DEF) 泵断路器。

B。 确认喷射机柜前面的 AC 断路器处于接通位置。
 

断路器
 

结果:AC DEF 泵断路器处于接通位置。

转至测试步骤 3。

结果:AC DEF 泵断路器没有处于接通位置。

修理:将 AC DEF 泵断路器置于接通位置。

如果故障未得到排除,则转至测试步骤 3。
 

3. 运转发动机。

A. 将配电箱上的 DC 断路器转至关闭位置至少 1 分钟。

B。 将配电箱上的 DC 断路器转至接通位置。

C. 起动发动机。

D. 运转发动机,直到达到正常工作温度。

E. 连接 Cat ET。

F. 使用 Cat ET 监控以下各项:

- 代码
 

代码
 

结果:代码未激活。

返回工作。
 

如果以上步骤未解决问题,请联系当地 Cat 代理商的技术通信员(TC)。 如需进一步的帮助,您的 TC 可以通过代理商解决方案网络(DSN)与您交谈。

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