Owner`s manual

73
ELECTRICAL SYSTEM
This section describes the various compo-
nents of the Electrical System on your
43MY. Also included is a Troubleshooting
Guide for your convenience.
AC/DC PANEL
The AC/DC Panel is where all the controls
for the electrical system are located. The
panel is broken down into three main
sections. The top part of the panel, labeled
12 Volt DC Controls, is the controls for the
electrical system when it runs on batteries.
The lower part of the panel, labeled 240
Volt AC Controls, is the controls for when
the electrical system runs on AC.
DC ELECTRICAL SYSTEM
The DC Electrical System obtains its
source of power from the batteries, lo-
cated in the engine compartment. The
negative terminal of each battery is at-
tached to a grounding stud on each en-
gine. This is known as a “negative ground
system” and is the approved system for
marine DC electrical systems. The battery
wiring system has two color-coded wires.
The yellow wire is the ground(negative)
wire and the red wire is the positive(“hot”)
wire. Both batteries are connected to a
battery switch(See photograph below).
The positions on the battery switch are
ON and OFF. The switch must be turned
to the ON position to supply power to the
DC electrical system. When the battery
switch is turned to the OFF position,
power is disconnected to the DC electrical
system.
NOTE: The bilge pumps, carbon monoxide
detectors and radio memory are NOT
disconnected from their power source
when the battery switch is turned to the
OFF position. These accessories are
connected directly to the battery and do
not require a switch for operation.
Battery Charging System
The batteries maintain their charge from
alternators, which are located on each
engine. The alternators supply charging
power to the batteries only while the
engines are running. Your 43MY also has
a converter, located in the bilge, which
converts 120 volt AC electrical power from
either the generator or shore power into
12 Volt DC electrical power.
Activating the DC POWER SYSTEM
There are three sets of switches that must
be in the “ON” position to activate the DC
Power to your 43MY. One set of switches
is on the ship service box down in the
engine room. These switches are normally
in the “ON” position. The second set of
switches would be the battery switches,
located under the AC/DC Panel in the
Salon Area. The third set would be on the
AC/DC Panel. On the top portion of the
AC/DC Panel are two rows of switches.
The very top switches on the top of each
row are the Main Battery Switches. Each
switch controls that row of switches below
it. To supply power to one of the switches
listed on the left side of the panel the top
switch on the left hand side must be on.