EAAM057608EN
GC250 Technical Manual 99
9.5.3.2
Stop
The engine can be stopped in two ways:
a)
With standard procedure
. Such procedure consists in performing an engine cooling
cycle (only if the load has previously been switched to the genset), keeping it running
without load. This procedure only applies in
AUTO
if:
o
There are no more automatic starting requests (see above)
o
An anomaly, qualified as “deactivation” or “discharge” occurred (it is an anomaly
typically dangerous for loads but not for the engine).
b)
With an emergency procedure
. This procedure requires immediate engine stop, without
engine cooling cycle. It applies if:
o
The controller is forced in
OFF_RESET
.
o
If the stop is requested in
MAN
.
o
Any anomaly classified as “failure” is activated and if the engine is in a different
status from
stop
or
no stop
.
The stop sequence is performed in the following cases:
When a failure, download or deactivation happen.
Using the commands received from USB port. The commands can be password
protected (P.0004) which has to be sent before any command. To send the command,
it is necessary to write in sequence (within 5 seconds):
o
HOLDING REGISTER 101: write the password configured with the parameter
P.0004.
o
HOLDING REGISTER 102: write value “21” (standard stop) or “22”
(emergency stop).
In
MAN
:
o
Pressing “STOP” from the controller panel.
In
AUTO
:
o
When the automatic intervention of the genset is no more requested.
INFORMATION!
: normally if you press the digit
STOP
in
AUTO
mode, the controller
activates the f
ailure A007 (“manual stop in automatic”): the engine is therefore stopped with
emergency procedure. It is possible to disable the digit
STOP
in
AUTO
mode acting on bit 0
of parameter P.0495 (keyboard options).
The stop phase can be also performed when the engine is already stopped.
9.5.3.2.1
Stop with standard procedure.
The stop standard procedure consists in performing a
cooling
cycle for the engine first (during
which the controller disconnects the genset from the loads). Such cycle is performed only if
during the
running
status the loads have been connected to the generator. During this cycle,
only
FUEL
command is active. The duration of the cycle is configurable with parameter P.0215
(“Duration of cooling cycle”). It is also possible to configure parameter P.0271 with a threshold
of temperature below which the cooling cycle ends and the engine is stopped. In any case,
the maximum duration of the cooling cycle is given by parameter P.0215.
From the
cooling
status it is possible to go back to the in
running
status if the stop requests
cease and there is at least one starting request (for example, we were in this status following
