Baudoulin 4M11G Maintenance Manual page 113

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
打开车辆电源开关将测试灯连接在发电机的B+和E
Turn on the power switch of the vehicle and connect the test lamp to the
②Malfunction diagnosis and troubleshooting of charging system
a) Charging failure
Vehicle symptom
The charging indicator
lamp fails to turn on after
turn-on of key switch.
The charging indicator
lamp fails to turn off
during idling of engine
and turns off during
high-speed running of
engine.
terminal B+ and E (negative) of the alternator.
（负极）端
测试灯是否亮 Is test lamp ON?
Connect the wire from terminal E to
将接E端转接发电机D+端
terminal D+ of alternator
Is test lamp ON?
测试灯是否亮
起动发动机
Start the engine
测试灯是否亮
Is test lamp ON?
Alternator is not Alternator is not
发电机无故障
malfunctioned malfunctioned
Figure 4-73 Flowchart for Judgment of Alternator Malfunction
Malfunction 1: Charging failure
Fault Detection
Check charging indicator
lamp.
Check the excitation circuit
for presence of open-circuit.
Low power of indicator lamp
or loose parallel excitation
resistor.
Low idling speed of engine.
Check whether the voltage to
ground of the alternator
说明发电机的B+端没有电压，同蓄
否
It indicates that there is no voltage at terminal B+
No
of alternator and the wire to the positive pole of
电池的正极端之间的导线有故障
battery is malfunctioned.
是
Yes
Yes 是
No
否
说明发电机的D+端的内部电器
It indicates that the internal electric circuit
at terminal D+ of alternator is
线路出现问题
malfunctioned.
Yes 是
Yes 是
Alternator
发电机故障
malfunction
No
否
Check alternator indicator lamp for presence of
voltage to ground. If not, replace indicator lamp or
check circuit.
If yes, it indicates that the alternator regulator or rotor
is malfunctioned. Repair or replace alternator.
Use recommended 2~6W lamp bulb or repair circuit.
Adjust idling speed of the engine.
If the alternator indicator lamp terminal voltage is
really low, it indicates low power of excitation line
105
Solution