47
G20, 30, 40 SIIIA Operation & Maintenance Manual
STOPPING SEQUENCE
The
return delay
timer operates to ensure that the starting request has been permanently removed and isn't just a short
term removal. Should another start request be made during the cooling down period, the set returns on load.
If there are no starting requests at the end of the
return delay
timer, the load is removed from the generator to the mains
supply and the
cooling
timer is initiated.
The
cooling
timer allows the set to run off load and cool sufficiently before being stopped. This is particularly important
where turbo chargers are fitted to the engine.
After the
cooling
timer has expired, the set is stopped.
MANUAL/START MODE
Note: If a digital input configured to panel lock is active, changing module modes is not possible. Viewing the
instruments and event logs is NOT affected by panel lock.
WAITING IN MANUAL MODE
Figure 17
STARTING SEQUENCE
Note: There is no
start delay
in this mode of operation.
The fuel relay is energised and the engine is cranked.
Note: If the unit has been configured for CAN, compatible ECUs receive the start command via CAN.
If the engine fails to fire during this cranking attempt then the starter motor is disengaged for the
crank rest
duration after
which the next start attempt is made. Should this sequence continue beyond the set number of attempts, the start
sequence is terminated and the display shows
Fail to Start
.
When the engine fires the starter motor is disengaged. Speed detection is factory configured to be derived from the main
alternator output frequency.
Additionally, rising oil pressure can be used to disconnect the starter motor (but cannot detect under speed or over
speed).
After the starter motor has disengaged, the
Safety On
timer activates, allowing Oil Pressure, High Engine Temperature,
Under-speed, Charge Fail and any delayed Auxiliary fault inputs to stabilise without triggering the fault.
To begin the starting sequence, press the
Manual Start Mode
button. If '
protected start'
is disabled,
the start sequence begins immediately.
If 'Protected Start' is enabled, the
Waiting in Manual Mode
icon is displayed and the LED above the
Manual/Start Mode
button flashes to indicate
Waiting in Manual Mode
.
The
Manual/Start Mode
button must be pressed once more to begin the start sequence.
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