Electrical system
WARNING! Before any work is done on the electrical system, the engine must be stopped and the current
cut by switching off the battery isolator. Shore current for engine heaters, battery chargers or other auxiliary
equipment connected to the engine must be disconnected.
WARNING! If maintenance has to be carried out on a powered up system, set control system to LOCAL
MODE to prevent remote start.
System voltage is 24 volt in a 2-pole system that consists of batteries, starter motor, generator, power module
(PM) and the Engine Electronic Control Unit (EECU), EMS2. The battery plus cable should always be connected
via a main circuit breaker.
PM
The power module supplies power to the EECU and
the control system. The power module protects the
systems from high current with a built in over cur-
rent protection. The power module also has an easy
link bus which makes it possible to connect some
easy link instruments directly to the engine. The in-
struments that can be used are tachometer, coolant
temp, oil temp, oil pressure, exhaust temp, freshwater
pressure, charge air pressure and engine hours.
Main circuit breakers
The main switches must never be disconnected
before the engine has been stopped. If the circuit
between the alternator and the batteries is discon-
nected when the engine is running, the alternator and
electronics can be damaged. The charging circuits
must never be re-connected with the engine running,
for the same reason.
IMPORTANT! Never disconnect the current with
the main switches when the engine is running.
Electrical connections
Check that electrical connections are dry, free from
oxide and that they are securely tightened. Spray
these connections as necessary with water-repellent
spray (Volvo Penta universal oil).
76
Maintenance. Electrical system
To Next Page
Loading...
