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User’s Manual
In the MANUAL mode the board DST4600A can receive the engine start/shutdown commands
and those for the power changeover from the buttons located on the front panel.
When the selector is brought to MANUAL the following operations are executed:
Keeping of the contactors status. From revision 00.00.39, it is possible to configure the
board for switch to mains (bit 2 of P79 parameter).
If the engine is being started it is stopped.
If a STOP cycle is in progress it is completed.
If the engine is cooling, such phase is cancelled and the engine is kept running.
The engine is kept running (if it was already running).
To start the generator set in the MANUAL mode press the START button and keep it pressed
until the engine is running. The START button is not accepted in presence of deactivation
and/or blocks. As a response to this command the board execute the following operations:
1.
It enables the “FUEL SOLENOID” output (terminal 22). Such output is automatically
removed during the stop cycles or if for 20 seconds the engine is dead.
2.
It disables the “STOP SOLENOID” output (terminal 18) (it should already disabled except
if the starting request occurs during a stop cycle), used for the dropout shutdown. If engine
is already running, the procedure stops here.
3. If the preheat function
for diesel engines is enabled, it activates the “AUX OUTPUT 1”
(terminal15) for the time set with the parameter P20 (if such time is equal to 0 the preheat
function is disabled). In this phase the display “MULTIFUNCTION” shows the message
“PRE”. At the end of this phase it disable the output and passes to the phase 4 (until SW
version 08.00.11 the output “FUEL SOLENOID” were activated only at the end of this
phase).
4.
It enables the “START” output (terminal 20) controlling the generator set starter. The
outpu
t is kept enabled until the release of the “START” button or until the engine running
recognition. In this phase the display “MULTIFUNCTION” shows the message “STA”.
For the MANUAL mode no start failure signal is foreseen.
The activation sequence is alway
s: “FUEL SOLENOID” (terminal 22), “AUX OUTPUT 1”
(PREHEAT OUTPUT) (terminal 15) and then “START” (terminal 20). Thus, it is possible to use
this feature to drive an auxiliary output that requires to be activated before the actual start
command (use parameter P38 to configure the delay time).
To stop the engine in the MANUAL mode press the STOP button. Unlike for the DST4600, it
is not necessary to keep the STOP button pressed until the shutdown has taken place: simply
press it for a second and the board execute a complete shutdown cycle. That is, it disables
the “FUEL SOLENOID” output and it enables the “STOP SOLENOID” one (terminal 18) for the
time set with the parameter P09 (if it is enabled the VOLVO engine EDC this time is fixed and
of 2 seconds).
The MANUAL mode doesn’t foresee any shutdown failure block, except for the automatic
shutdown cycles following blocks or deactivation.
