Sincro HB 2 Manual Para El Uso Y Mantenimiento página 25

unusual signs: vibrations, unusual noises, clogged air vents.
If undue vibrations or noises appear after long-term usage, these could
be due to a worn bearing that, if damaged, has to be replaced.
The bearing should always be replaced after 20.000 working
hours.
Bearings on generators with belt transmissions, since they undergo
greater loads than generators driven by direct couplings, usually have
a shorter lifespan and should be changed after 15,000 working
hours.
Important! A bearings lifespan is closely linked to the working
conditions and environment.
Important! Long periods of sustained vibrations can damage the
bearing balls and their seat. Too high humidity can emulsify the
grease and encourage corrosion.
Important! Intense vibrations caused by the motor or bad alignment
of the components in the electricity generating set put the bearing
under stresses that will reduce its lifespan.
7.3 Troubleshooting
The generator will not excite.
• Check the fuse.
• Increase speed by 15%.
• Apply a 12V voltage for an instant across the electronic regulator ter-
minals using a battery with a 30Ohm resistance in series and remember
to respect the polarities.
After it is excited it deactivates.
• Check the wiring against the diagrams in appendix.
No load voltage too low.
• Calibrate the voltage.
• Check the rpmʼs.
• Check the windings.
No load voltage too high.
• Calibrate the voltage.
• Change the regulator.
Under load voltage below nominal.
• Calibrate the voltage.
• Current too high, cosϕ below 0.8, speed below 4% of nominal.
• Change the regulator.
• Check the diodes, unhooking the cables.
Under load voltage above nominal.
• Calibrate the voltage.
• Change the regulator.
Unstable voltage.
• Check for uniform rotation.
• Control regulator stability by adjusting potentiometer "ST".
For any other problem please contact the Sincro Aftersales service
centre.
Important!
A bearings lifespan is closely linked to the
working conditions and environment.
Long periods of sustained vibrations
can damage the bearing balls and their
seat. Too high humidity can emulsify the
grease and encourage corrosion.
Intense vibrations caused by the motor
or bad alignment of the components
in the electricity generating set put the
bearing under stresses that will reduce
its lifespan.
HB - Maggio 2004 - Rev. 00 - 25
ENGLISH