Operator`s manual
ELECTRICAL SYSTEM
Engine 12-Volt DC Control Circuit
The engine that drives the generator end has a 12-Volt DC electrical control circuit, as shown on the
wiring diagrams which are illustrated on the following pages. Refer to these diagrams when
troubleshooting or servicing electrical components on the engine.
II
CAUTION
II
To avoid damage to the battery's charging circuit, never shut off the engine's battery
switch while the engine is running.
However, shut off the engine's battery switch to avoid electrical shorts when working on
the engine's electrical circuit.
Battery Specification
The minimum recommended capacity
of
the battery used in the engine's
12-
Volt DC control circuit
is
90
-
125
Ampere-Hours (minimum) for the generator sets covered
by
this manual.
II
CAUTION
II
When quick-charging the battery with an external charger, be sure to disconnect the
battery cables from the battery. Leaving the charging circuit connected while quick-
charging will damage the alternator's diodes.
Alternator
II
CAUTION
II
When testing the alternator circuit (charging circuit),
do
not
use
a high-voltage tester
such as a megger; damaged diodes could result.
When operating the generator,
do
not disconnect the positive terminal
of
the battery
from the B terminal
of
the alternator, nor disconnect the negative terminal
of
the battery
from the ground.
When cleaning the engine/generator with a steam cleaner, be careful to keep steam away
from the DC and
AC
alternators.
WESTERBEKE GENERATORS
48