Service Manual for WP6 Diesel Engine
99
(2)
Charging system fault diagnosis and troubleshooting
a)
No charging
Fault 1: No charging
Phenomenon
Fault detection
Troubleshooting
(1)
Turn on
starting key,
but charging
indicator
doesn’t light.
a.
Check charging
indicator lamp.
b.
Check whether there is
open circuit in exciting
circuit.
a.
Check whether there is voltage between
charging indicator and ground, if no
voltage, replace the indicator lamp or
check the circuit.
b.
If it is generator regulator failure or
generator rotor failure, repair or replace the
generator.
(2)
Charging
indicator
doesn’t go
out when
engine
idling, it only
goes out
when engine
is in high
speed.
a.
Rated power of
indicator lamp is small
or parallel exciting
resistance gets loose.
b.
Too low idling speed.
a.
2~6w lamp is recommended, or repair the
circuit.
b.
Adjust engine idling speed.
(3)
Charging
indicator
doesn’t go
out when
engine is
working.
a.
Check whether
generator to ground
voltage is within 1~3V;
b.
Check whether
generator output end
B+ to ground voltage is
about 24V (battery
voltage).
a.
If voltage of generator indicator end is very
small, then it means rated power of
indicator lamp is small or there is fake
connection in the circuit. Adjust indicator
lamp power or check the circuit (connector
and connecting point).
b.
If voltage of generator indicator end is
zero, then it means there is short circuit in
exciting circuit, check the circuit.
c.
If voltage of generator indicator end is
battery voltage, then it means there is fault
in exciting circuit, and generator regulator
and exciting tube may be damaged in the
same time, please amend the exciting
circuit and then repair the generator.
a.
If B+ terminal to ground voltage is zero,
then check generator to battery positive and
negative circuits for breakover.
b.
If B+ terminal to ground voltage is
obviously lower than battery voltage, then
check whether generator to battery positive
and negative circuits are loose or the
battery is damaged.
Recommended detection method: Connect
a 2W indicator lamp to generator B+
terminal and exciting D+/L terminal,
observe working condition of the indicator.
Troubleshooting:
Содержание WP6
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