(3)Troubleshooting steps for failure to regulate voltage of diesel engine set
(Fig. Flow chart for diesel 3)
(4)Troubleshooting steps for low output voltage of diesel engine set (insufficient
power) (Fig. Flow chart for diesel 4)
Failure to regulate voltage
Check the voltage on gauge panel
for 300 or above
Check the sampling harness
of generator or sesure the
socket connector
Check the socket connector of gen-
erator stator harness and sampling
winding for loosened plug.
Check the regulating potentiometer
of AVR for damage
Replace AVR
Low voltage or insufficient power of generating set
Check the load of generating set for overloading
Checkout the power factor (cos )for overloading
Check the voltage of generating set for dropping
Adjust or decrease the loading
power of generating set
Check that the frequency of generating set is in the
rangs of rated frequency of generating set(52.5~49.5
H2 or 62.5~59.5H2 for zero load and full load)
No
No
Yes
Yes
Overloading Not overloading
Check the engine regulator system
in the range beyond the range
Check generator for
heating up
Check AVR for
abnormal work
Check the carburettor
oil-line system for sei-
zing or clogging
Check engine
regulating bolt
or regulating
lever for seizing
Replace AVR
Check the rotor in generator for iron core
Check the rear end cover
of generator for wearing or
damaged rotor bearing
Check engine crankshaft for
eccentricity or damaged bearing
(5)Troubleshooting steps for automatic stopping of diesel engine set
(Fig. Flow chart for diesel 5)
Check that the engine oil alert system
is at low level (the contact of alertor is
connected to casing)
Add engine oil
Check the engine oil filter for clogging
Replace engine
oil filter
Check the engine oil sensor for groun-
ding
Replace engine
oil sensor
Check the harness for short circuit
Replace connector
Check gauge PCB, whether the harn-
ess is normal in energized state
Good
Yes
Automatic stop
Check that the magnet for stopping is
energized
Replace PCB
Replace engine
oil sensor
Check the battery
for 12V
Check oil system
tank filter and carb-
uretor for clogging
Replace engine
oil filter
Check the 12V shutdown
circuit on gauge panel,
check the contact of relay
for loosening, check the
starting switch
Check flywheel for
voltage output
Replace flywheel
Check charging
regulator for 12V
Replace charging
regulator
Replace relay
Replace starting
switch
No
Good
Yes
Yes
Good
Yes
Yes
Yes
No
Good
Yes
Yes
Yes
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