Baudoulin 4M11G Maintenance Manual page 114

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
The charging indicator
lamp fails to turn off
while the engine
running.
exciting terminal is within
1~3V.
is
Check whether the voltage to
ground of the alternator
output terminal B+ equals to
battery voltage
approximately 24V.
indicator lamp or loose connection in circuit. Adjust
the indicator lamp power or check the circuit
connectors and connection points.
If the alternator indicator lamp terminal voltage is
zero, it indicate the presence of short-circuit to
ground at the excitation circuit alternator terminal. In
such case, check the circuit.
If the alternator indicator lamp terminal voltage is the
battery voltage, it indicates the presence of
malfunction in vehicle excitation circuit and that the
alternator regulator and excitation tube may be
damaged. In such case, make sure to correct the
excitation circuit and then repair the alternator.
If the B+ voltage to ground is zero, check whether
both the positive and negative wires between
alternator and battery are under continuity status.
of If the B+ voltage to ground is significantly below the
battery voltage, check the connecting points of
positive and negative wires between alternator and
battery for presence of looseness or check the battery
for damage.
Recommended measurement method: Jumper connect
one 2W indicator lamp between alternator output
terminal B+ and excitation terminal D+/L and
observe the working status of indicator lamp.
Solution:
The lighting intensity of indicator lamp is normal, the
indicator lamp turns off after the engine is started,
and the alternator output voltage is 27~28.5V. The
vehicle excitation circuit is malfunctioned and needs
checking and repair.
The lighting intensity of indicator lamp is normal, the
indicator lamp turns on constantly after the engine is
started, and the alternator output voltage is 27~28.5V.
The alternator regulator is malfunctioned and needs
to be replaced.
The lighting intensity of indicator lamp is normal, the
indicator lamp turns on constantly after the engine is
started, and the alternator output voltage is the battery
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