Operation Manual of WEICHAI GENSET
Faults and troubleshooting
methods of alternator
Important! Check whether all
connections are disconnected or loose
before any troubleshooting step.
AVR-troubleshooting
1. No voltage output when the set is
running
1) Check whether the AVR wiring is
correct and reliable;
2) Check the rotating speed of diesel
generator set;
3) Check the residual magnetic
voltage of the alternator and
magnetize the alternator if necessary;
4) Check the alternator and AVR
according to the steps of excitation
separation test method.
5) The rotating diode is damaged.
2. Unstable output voltage of set
1) Check whether the rotating speed
of the set is stable;
2) Check whether the stability setting
is correct.
3. Output voltage too high
1) Check whether the rotating speed
of the set is too high;
2) Check whether the load carried by
the set is capacitive load (power factor
lead).
4. Too low voltage at no load
1) Check whether the rotating speed
of the set is too low;
2) Check whether the K1-K2 wire of
AVR or the external manual fine
adjustment device is in good condition.
5. Excessively low voltage under load
1) Check whether the rotating speed
of the set is normal;
2) Check whether the alternator AVR
is normal according to the steps of
excitation separation test method;
3) The rotating diode is damaged.
Note:
See Operation Manual of Three-phase
Synchronous Alternator for details of
the faults and troubleshooting
methods of synchronous alternators.
See the Operation Manual of Control
Panel of Diesel Generator Set for
troubleshooting methods of control
panel of set.
See the Operation Manual of Electronic
Governor for faults and
troubleshooting methods of electronic
governor.
For more detailed contents about fault
analysis and troubleshooting of the
control module, please also see the
random data of control box.
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