Maintenance: Electrical system
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Electrical system
The engines have a comprehensive electrical engine management system. This automatic system monitors
engine speed as well as the electrical and fuel systems and the engine cooling and lubrication functions. The
system consists of a number of switches and sensors which activate an alarm or automatic stop (optional) if a
fault is detected in the engine.
Supply voltage is 24V.
WARNING! Before starting work on the electrical system, the engine must be stopped and the power
turned off with the main switches. Shore power to the engine heater, battery charger or other extra equip-
ment fitted on the engine must be disconnected.
Main switches
The main switches must never be turned off until the
engine has been stopped. Breaking the circuit be-
tween the generator and the batteries while the en-
gine is running can damage the generator. For the
same reason, the charge circuits must never be
switched while the engine is running.
IMPORTANT! Never turn the power off using
the main switches while the engine is running.
Electrical connections
Make sure electrical connections are tightened, dry
and free from oxide. If necessary, spray these con-
nections with water-repellant (Volvo Penta all-round
oil).
Fuses
The main electric terminal box has a fuse strip with
four glass-tube fuses (2 x 20A and 2 x 8A).
The fuses can be changed when the relevant fuse
holder has been folded up (the fuse can be pulled for-
wards, out of the holder).
Determine the cause of the overload before resetting
the fuses.
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