Fabco Power
Instruction Manual
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Page 8
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TROUBLE SHOOTING
PROBLEMS
CAUSES
REMEDIES
ALTERNATOR EXCITATION
FAILURE
1.
Low Speed
2.
Faulty capacitor
3.
Faulty winding
1.
Check RPM and set at nominal
value.
2.
Check and replace.
3.
Check that winding resistance is
as shown in the tables.
HIGH NO-LOAD VOLTAGE
1.
Speed too high.
2.
Capacitor with high capacity.
1.
Check and adjust RPM’s
2.
Check and replace
LOW NO-LOAD VOLTAGE
1.
Speed too low.
2.
Faulty rotary diodes.
3.
Breakdown in windings.
4.
Capacitor with high capacity.
1.
Check and adjust RPM’s
2.
Check and replace.
3.
Check winding resistance, as
per tables.
4.
Check and replace.
PROPER NO-LOAD BUT LOW
LOADED VOLTAGE
1.
Low loaded speed.
2.
Load too large.
3.
Rotary diodes short-circuited
1.
Check and regulate RPM.
2.
Check and change.
3.
Check and replace.
UNSTABLE VOLTAGE
1.
Loose contacts.
2.
Uneven rotation.
1.
Check connections.
2.
Check for uniform rotation
speed.
NOISY GENERATOR
1.
Broken bearings.
2.
Poor couplings.
1.
Replace.
2.
Check and repair.
