Volvo Penta KAD/KAMD300, Operator'S Manual

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Electrical system
The engine is equipped with a two-pole system electrical system which means that the voltage (minus) is returned
directly from the starter motor minus terminal with the battery negative lead. Individual components on the system
return voltage to the starter motor minus terminal via separate cables.
WARNING! Always stop the engine and break the current using the main switches before working on the
electrical system. Isolate shore current to the engine block heater, battery charger, or accessories mounted
on the engine.
Fuses/circuit breakers
The engine is equipped with circuit breakers in the
electrical distribution box. The circuit breakers cut the
current if the electrical system is overloaded.
If the engine can not be started, or if the instruments
stop working when driving, a circuit breaker might
have tripped. Re-set the circuit breaker by pressing in
the button on the distribution box.
The EDC system (1) and the compressor (2) have 7.5
A fuses beneath the distribution box. (There are spare
fuses in the distribution box.)
IMPORTANT! Always investigate the reason for
the overload!
The control lever with integrated Power Trim control
button has a 5A fuse in the cable.
IMPORTANT! Always keep a stock of spare
fuses on board.
Drives with electric shift have a 5A fuse (3) in the ca-
ble, by the actuator.
Main switch
The main switch must never be turned off before the
engine has stopped. If the circuit between the genera-
tor and the battery is cut off when the engine is run-
ning the generator can be seriously damaged. For the
same reason charging circuits must never be
switched over while the engine is running.
IMPORTANT! Never break the circuit with the
main switches while the engine is running.
Maintenance: Electrical system