67
Electrical System
Main Circuit Breakers
DC Power is distributed to the fuse panels, helm
switch panel, electronics and other main circuits
through heavy duty circuit breakers located in
the battery switch panel. These main circuits are
deactivated when the house battery switch is off.
The breakers are supplied power whenever the
House battery switch is on.
Heavy duty breakers are equipped with a red
“push to test” button and a black or yellow re
-
set lever. If the circuit breaker is tripped by an
overload, the yellow or black lever near the center
of the breaker will be visible and pointing down-
ward. Reset the breaker by pushing the lever
until it resets and locks in the “ON” position. The
circuit breaker can be tested for proper operation
by pressing the red test button.
Notice:
If a main circuit breaker trips, always make
sure the problem that caused the breaker to
trip is found and corrected before resetting
the breaker.
The following are the main circuits supplied and
protected by heavy duty circuit breakers:
Main
Protects the circuit that supplies 12 volt current
to the cabin DC panel, accessory switch panels
and most DC accessories in the cabin and cockpit.
This circuit is deactivated when the House battery
switch is off.
Hardtop
Protects the circuit that supplies 12 volt current
to the hardtop accessory circuits. This circuit is
deactivated when the House battery switch is off.
Electronics
Protects the main circuit that supplies 12 volt
current to the electronics fuse panels below the
helm. This circuit is deactivated when the House
battery switch is off.
Windlass
Protects the circuit that supplies 12 volt current
to the windlass main circuit. This circuit is deac-
tivated when the House battery switch is off.
Amp 1
Protects the circuit that supplies 12 volt current
to the stereo amplifier. This circuit is deactivated
when the House battery switch is off.
Amp 2
Protects the circuit that supplies 12 volt current
to the stereo amplifier. This circuit is deactivated
when the House battery switch is off.
Optimus Power Steering Main Circuit Breakers
Boats with Optimus electronic steering are
equipped with a heavy duty circuit breaker for
each engine steering pump in the aft systems
compartment. These breakers protect the steer-
ing pumps from an overload.
Helm Master Main Circuit Breakers
Boats with Yamaha Helm Master Electronic Steer-
ing systems are equipped with a heavy duty circuit
breaker for each engine steering pump in the aft
systems compartment. These breakers protect
the steering pumps from an overload.
Yamaha Main Fuses
Power is distributed to the Yamaha Helm Master
Control System through individual heavy duty
blade type fuses located near the battery switches.
Other engine control and/or charging systems
could also be protected by heavy duty fuses. Refer
to the engine owner’s manual for information on
circuit protection and amperage requirements for
the engines and controls on your boat.
If a main fuse blows, it must be replaced with a
fuse of the same size and amperage as the origi-
nal. The fuses are labeled and color coded. Never
try to correct a problem by installing a fuse with
a higher amperage rating. This could cause the
circuit with a problem to overheat, which could
result in an electrical fire or permanent damage
to sensitive engine and control components.
Main Circuit Breakers
Summary of Contents for 340 DC
Page 1: ...OWNER S MANUAL 340 DC...
Page 2: ...2 Revision 0 11 07 2018...
Page 14: ...14 NOTES...
Page 22: ...22 NOTES...
Page 25: ...25 Operation...
Page 86: ...86 NOTES...
Page 102: ...102 NOTES...
Page 122: ...122 NOTES...
Page 130: ...130 NOTES...
Page 149: ...149 MAINTENANCE LOG Appendix B Hours Date Dealer Service Repairs...
Page 150: ...150 Maintenance Log Hours Date Dealer Service Repairs...
Page 151: ...151 Maintenance Log Hours Date Dealer Service Repairs...
Page 152: ...152 Maintenance Log Hours Date Dealer Service Repairs...
Page 153: ...153 Maintenance Log Hours Date Dealer Service Repairs...
Page 154: ...154 Maintenance Log Hours Date Dealer Service Repairs...
Page 155: ...155 Appendix C BOATING ACCIDENT REPORT...
Page 156: ...156 Boating Accident Report...
Page 157: ...157 Boating Accident Report...
Page 158: ...158 NOTES...
Page 160: ...160 NOTES...
Page 167: ...CAUSE AND SOLUTION...