9 SINCRO® is a brand of Soga Energy Team ITALY | sogaenergyteam.com | info.sincro@sogaenergyteam.com
MAINTENANCE AND TROUBLE-SHOOTING
PREVENTIVE MAINTENANCE
Periodical inspections of the equipment are required to ensure they are clean, dust and moisture
free. It is essential that all terminals and connections are kept free from corrosion.
TROUBLE-SHOOTING
Trouble Possible
causes
Corrective
actions
Alternator field voltage
does not build up on start-
up.
-
Residual voltage excessively low;
-
Terminals +Ex and - Ex are
inverted.
-
Use external battery (12Vdc) to
force excitation;
-
Invert +Ex and – Ex.
Generated voltage
oscillates at no load.
-
Stability response incorrectly
adjusted
-
Alternator excitation voltage
excessively low
- Unstable engine speed
-
Adjust trim pot ST;
-
Check the frequency/engine
speed
Voltage surges.
-
Lack of sensing;
-
Faulty electronic circuit;
-
Sensing voltage incompatible with
regulator.
-
Check if alternator phases are
present in the sensing circuit;
-
If the regulator is
encapsulated, replace it;
-
Use a compatible sensing
voltage.
Generated voltage decreases
when load is applied, and it
doesn’t return.
-
Speed drop of the prime
mover.
-
U/F protection engaged.
-
Correct speed regulation;
-
Adjust U/F limiter by rotating
trimpot UF clockwise (CW).
During turn-off procedure the
regulator fuse blows.
- U/F protection adjusted for a very
low (or zero) frequency.
- Adjust U/F to a value close to the
operating frequency of the alternator.
Voltage too low
-
Speed too low
-
Field windings short-circuited
-
Main field winding short-
circuited
-
Rotating diodes burnt out
- Increase the drive speed
Voltage too high
-
Adjustment ineffective
-
Faulty AVR
-
Adjust the AVR voltage
-
Change the AVR
To Next Page
Loading...