Westerbeke 7.0 KW BGC -60Hz Technical Manual page 148

FAULT
No voltage or less than
residual produced (0 - 5 volts).
(H - N)
Residual voltage only present
at no-load (6 - 8 volts).
(H - N)
Correct no-load voltage.
but high voltage output when
load applied.
Unstable voltage output.
CAUSE
1. Shorted or open main
stator windings (B).
1. Engine speed.
2. Exciter windings faulty.
3. Capacitors faulty.
1. Engine speed is too fast.
1. Poor governor reaction.
CORRECTION
1. Check resistance value of
windings and short to case.
Artificially excite the generator
to induce a short.
1. Adjust governor.
2. Check winding resistance
for open or short.
3. Check capacitors.
1. Adjust hunting/regulation
on the governor.
Adjust to proper no-load
voltage hertz.
1. Adjust hunting/regulation
on the belt-driven governor.
2. Loose electrical connections. 2. Check the security and
IWARNINGI
cleanliness of electrical
connections.
Stop the generator before checking the connections.
Noisy generator.
Westerbeke Generators
1. Unbalanced load
(120/240 wired).
2. Rear support bearing
is faulty.
3. Generator connection
to engine is loose.
144
1. Check each load as it is
taken off each 120 volt
leg with an amp-probe.
2. Check each load as it is
taken off each 120 volt
leg with an amp-probe.
3. Stop the generator
and check the
connection.