Westerbeke 9.0 BCG Technical Manual page 214

To test the bridge rectifier, if it is believed to be
faulty, follow the test directions below.
a. Set the ohmmeter scale on RX1
(+
DC). Set
the meter to zero.
b. Connect the positive
(+)
lead from the
meter to point #4. With the negative (-) lead
from the meter, momentarily contact points
#1, #2, #3 and #5. The needle should not
move, showing infinite resistance.
c. Remove the positive (
+ )
lead from point #4
and connect the negative (-) lead to point
#4, and with the positive (
+)
lead from the
meter momentarily touch points #1, #2 and
#3. The needle should deflect showing
passage through the diodes in the rectifier.
d. With then negative (-) lead still attached to
point #4, touch point #5 with the positive
( + )
lead. The needle should not deflect.
-:t-_-
POint '3
Note: Some ohmmeters will reverse steps band c.
e. Place the positive (+) lead ofthe meter on pOint #1 and the negative (-) lead on point #3. The needle
should not deflect (infinite resistance). Reverse the leads to #1 and #3. Again there should be no
deflection If the rectifier fails any of the above tests (a through e), the rectifier is defective and
should be replaced.
3. Ballast Resistor: 0.3 Ohm
Early model integral controllers have a bal-
last resistor installed along the DC plus (
+ )
lead running from the bridge rectifier to the
integral controller. This coil-type resistor
functions to suppress high amperage draw
coming from the controller when it is trying
to charge a discharged starting battery.
Early controllers having this resistor in the
DC charging circuit are of the three lead
type. These three lead types consist of
either three spade plugs in connections, or
consist of three wire leads coming from the
controller.
The resistance value of the ballast coil is
BALLAST RESISTOR
60 HZ
LC.
INTEGRAL
CONTROLLER
EARLIER MODELS
DC
CHARGE
measured between the lifted (
+ )
lead at the bridge rectifier and the 60 hertz connection unplugged from the
controller (that is, controllers having plugs in the connector).
Controllers with three leads coming from the controller measure resistance between the unplugged 60 hertz
connection at the bridge rectifier and the brown lead connection on the coil resister terminal block.
Westerbeke Generators 208