Volvo Penta D4 Operator's Manual page 84

Maintenance
82
Electrical System
The engine is equipped with a 2-pole electrical system
and an alternator. System voltage is 12V or 24V.
WARNING!
Always stop the engine and break the current using the
main switches before working on the engine.
Main Switch
IMPORTANT!
Never disconnect the current with the main switches
when the engine is running, the alternator and elec-
tronics could be damaged.
The main switches must never be switched off before
the engine has stopped. If the circuit between the alter-
nator and the battery is disconnected when the engine
is running, the alternator and electronics can be dam-
aged. For the same reason the charging circuits must
never be re-connected with the engine running.
Fuses
12–volt system (engine)
The engine is fitted with automatic circuit breakers. The
circuit breakers cut the power if the system is over-
loaded.
If it is not possible to start the engine or if the instrument
stops working while running, the circuit breaker may
have been activated.
Resetting will take place automatically.
24–volt system (engine)
The engine is fitted with two automatic circuit breakers
(1). The circuit breakers cut the power if the system is
overloaded. If it is not possible to start the engine or if
the instrument stops working while running, the circuit
breaker may have been activated. Reset by pressing
in the circuit breakers (1).
IMPORTANT!
Always investigate the cause of the overload. If the
fuse trips frequently, contact an authorized Volvo
Penta workshop.
7748934 04-2008