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Group 23 EDC III
Electrical system
Electrical system
Important about the electrical
system
Important!
Stop the engine and cut off the po-
wer with the main switch before working with the
electrical system.
1.
Main switch
Never open the circuit between the generator and
the batteries when the engine is running.
The main switch/switches must never be swit-
ched off before the engine has stopped.
If the circuit is opened when the engine is running,
the voltage regulator can be ruined and the gene-
rator can be badly damaged.
For the same reason, charging circuits must not
be switched when the engine is running. For si-
multaneous charging of two independent battery
circuits, a Volvo Penta charge distributor can be
mounted on the standard generator (accessory).
2.
Batteries
Never mistake the positive and negative poles for
each other when installing the batteries.
This could cause serious damage to the electrical
equipment.
Compare with the wiring diagram. Battery poles
should be well cleaned and cable shoes should al-
ways be secured and well greased.
Avoid quick charging the batteries. If quick char-
ging must be used, the ordinary battery cables
must first be disconnected.
NOTE:
Follow applicable safety regulations when
charging the batteries.
When charging, the cell plugs should be loosened but
remain in the cell hole. Ventilate well, especially if the
batteries are being charged in a confined area.
Never cut off the charging current
before
disconnec-
ting the charge clamps.
Warning!
The battery compartment must never
be exposed to open flames or electric sparks.
Never smoke near the batteries. When the bat-
teries are being charged, they give off hydrogen
which, when mixed with air, forms oxyhydrogen
gas. This gas is highly flammable and very ex-
plosive.
Always wear protective goggles when charging
and handling batteries.
The battery electrolyte contains highly corrosive sulfu-
ric acid.
If it gets on your skin, wash the area with soap and
plenty of water. If the electrolyte gets in your eyes,
rinse them at once with plenty of cold water and seek
medical attention immediately.
3.
See ”Start with booster batteries” on how to jump
start using booster batteries.
4.
Connecting extra equipment
All extra equipment must be connected to a sepa-
rate junction box and fused.
Extra outlets directly from the instrument boards
should be avoided. Extra outlets are permissible
only up to a
max. total of 5A
(applies for all in-
strument boards together).
Electric welding
Remove the positive and negative cables from the
batteries.
Then remove all connections to the generator.
Then remove the cable glove from the control module
(EDC III). See the instructions in ”Control module
(EMS), replacement”.
Always attach welding clamps to the part that is to be
welded as close to the welding area as possible. The
clamps must never be attached to the engine or in
such a way that current can pass over any bearing.
Important!
After welding, the removed compo-
nents, such as cable glove, generator cable and
battery cables, must be refitted in the correct or-
der.
