Diesel Gen-set Operation Instructions
76
digital tachometer.
2
Speed sensor malfunctions
Contact with after-sale service personnel to
maintain or replace.
3
Fuel supply system is blocked
Check if fuel supply pipe or fuel filter is
blocked. If necessary, replace it.
4
There is water in diesel
Replace fuel and add oil-water separator
5
Adjustment of throttle control
lever is improper
Check travel of accelerator
5. Voltage of the Gen-set is abnormal
No. Causes
Troubleshooting
1
There is no voltage during starting of the Gen-set
The Gen-set does not reach
Rated speed
Adjust throttle control handle of engine
until it reaches to Rated speed
Remanence voltage is low
Magnetize (as shown below)
Other
reasons
Check alternator and AVR as per
procedures of excitation separation (as
shown below)
2
Voltage is unstable in loaded or no-load operation
Speed is unstable
Adjust speed regulator
AVR stability setting is
incorrect
Adjust AVR stability potentiometer of
engine (as per the method introduced in
Chapter 3)
3
Voltage is too high in loaded or no-load operation
Speed is the Gen-set is too high
Reduce speed of the Gen-set to
1500~1560r/min
Power factor is leading
Capacitive load is too high
4
Voltage under no load is too low
Speed is too low
Adjust speed of the Gen-set to
1530~1560r/min
Terminal 1-2 of AVR is not
shorted
Connect terminal 1-2 (or 6-7) of AVR in
short
5
Voltage under load is too low
Speed is too low
Adjust speed of the Gen-set to about
