Protections; Low Oil Pressure Protection; High Water Temperature Protection; Alternator Overheating Protection - Mase Generators MARINE I.S. 21.5 Manual Uso Y Mantenimento

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5. PROTECTIONS

The generators are equipped with a series of protec-
tions which safeguard it against improper use and faults
which may compromise integrity.
When the generator stops because a protection has
tripped, on the engine protection module [Fig. 5, Ref. 5]
of the control panel the warning light relative to the fault
will come on.

5.1 Low oil pressure protection

Intervenes switching off the generator when the engine oil
pressure is insufficient. Its intervention is signalled by the
"OIL" light [Fig., 4, Ref. 7] coming on. Normally it is
sufficient to top up with the lacking quantity of oil to be
able to restart the generator.
- The low oil pressure protection does not give an
indication of the level of engine oil in the sump.
Therefore, check this level daily.
- The engine functions properly if it does not exceed
an inclination of maximum 30º for less than 3
minutes, 25º without time limit, both on the longi-
tudinal and the transverse axis. If the engine is
operated at a greater inclination, the risk is insuffi-
cient lubrication or aspiration of engine oil through
the air filter.

5.2 High water temperature protection

Intervenes switching off the generator when the engine
coolant temperature is too high or there is no circulation
of seawater.
Its intervention is signalled by the "ºC" light [Fig. 4, Ref.
10] coming on.
Only restart the generator after the cause of the fault has
been identified and removed.

5.3 Alternator overheating protection

Intervenes switching off the generator when there is a
thermal overload on the alternator.
Its intervention is signalled by the "ºC" light [Fig. 4, Ref.
8] coming on. The generator can be restarted after a few
minutes when the temperature of the alternator windings
has returned to normal values. It is, however, recom-
mended to find and remove the causes of the interven-
tion.
In the event of one of the above
described protections intervening, after ascertain-
ing and removing the cause of the intervention, press
the "STOP" button to reset the control panel (other-
wise the signal would remain in memory preventing
the engine from starting).
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5.4 Protection against short-circuit and overload

The generator is protected against short-circuit and
overload. A bipolar magnetothermal switch [Fig. 4 Ref.
2] cuts the supply of electric current when a short-circuit
occurs or when the electric current delivered exceeds the
nominal value.
Before restoring the contact by lifting the lever of the
magnetothermal switch, disconnect the utilities.
5.5 Protection against short-circuit of the low-
voltage electric system
In the event of a short-circuit in the low-voltage electric
system, a thermal switch [Fig. 4, Ref. 3] breaks the
circuit stopping the generator. In this case the warning
lights of the engine protection module will all be off and
it will not be possible to re-attempt starting.
Before restoring the electric circuit by pressing the
button located on the thermal switch [Fig. 4 Ref. 3], have
a specialised technician find and remove the cause of the
short-circuit.

6 MAINTENANCE

6.1 Preamble

the generator must be carried out with the engine off
and leaving it to cool down sufficiently, and must
only be carried out by authorised and suitably trained
personnel.
It is recommended to scrupulously follow the instruc-
tions in the manual provided by the engine Manufac-
turer with each generator.
It is important to regularly inspect and carry out mainte-
nance on the generator. The frequency of maintenance
should be decided on the basis of the number of hours
of operation.
To proceed with maintenance the side and top doors
must be removed.
Before accessing the generator,
disconnect one pole of the starter battery in order to
prevent accidental starting.
6.2 Ordinary engine maintenance
The periodic maintenance to be carried out on the engine
is listed in TABLE "B".
For more detailed information consult the manual pro-
vided with each generator by the engine manufacturer.
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IS 21.5-23.5
Any maintenance operation on