Service manual

4. Troubleshooting
4-3
4.2 Generator Troubleshooting
4.2.1 No voltage is generated or voltage too low
Raise the speed to the
specified value,
watching the
frequency meter.
Check the frequency meter
and confirm that engine
speed during no-load
operation corresponds to
the following values.
Check the AC output
voltage of output terminals
R, S and T.
Check the terminal
voltage of the voltage
meter.
OKOK
The Ex.startor connectors
(J,K) are connected
properly.
NO (Disconnected)
Conductivity in AVR
resistor hand trimmer?
NO
A
None or low
OK
OK
Lower
speed
No speed
increases
No-load speed
60Hz About 62.5 Hz/1,875 min
-1
OK
Refer to "Engine
manual".
Defective resistor
hand trimmer.
Replace the meters.
Connect again
correctly.
Residual magnetism
does not exist any
more.
Voltage normal
If magnetized forcibly, how
does the voltage change.
Fault in rotary
rectifier.
B, C
Winding wire broken in
generator or insulation
poor?
YES
NO
0 or lower.
Repair winding wire
in generator.
D