DCU 205 User’s Manual
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4.
O
PERATING THE
C
ONTROL
U
NIT
The
DCU 205
Control Unit is controlled using the seven pressure-sensitive
push buttons on the front panel. For remote operation see chapter 8. The
functions of these push buttons are discussed underneath.
4.1.
Start button
For manual starting of the engine. The start
solenoid is activated as long as the button is
pressed, but is disabled when the RUNNING
signal comes on. The RUNNING signal indicates
that the engine has reached ignition speed.
The lamp in the start button area lights up when
the button is pressed, when a remote start signal
is given, or when the Control Unit receives an
AUTOMATIC START signal in the STANDBY
mode.
4.2.
Stop button
The engine will stop immediately when voltage is
applied to the stop solenoid connected to terminal
no. 9. A brief press on the button is enough to
activate the stop solenoid, which is then activated
for approx. 50 seconds. The voltage on terminal
no. 10, used for run solenoids or as feed voltage
for electronic regulators, disappears at the same
time.
The lamp in the STOP button will light during the stop holding time (the
time terminal 9 has voltage), or if the engine has a DELAYED STOP
command in STANDBY mode.
4.3.
Standby button
Standby START
STANDBY is a situation where the Control Unit will try to start the engine
three times if an external start signal, AUTOMATIC START, e.g. in the form
of a blackout signal, is applied to terminals no. 21-22. The signal must be
applied during the entire start sequence, approx. 45 sec., and may then be
removed.
The lamp in the START button will remain on as long as the AUTOMATIC
START signal is present. If the signal is removed, the start sequence will
be aborted.
Each start attempt lasts 7 seconds followed by a 7-second pause (50%
duty cycle). In addition, there is a 2-second delay before the first start.
These delays are not adjustable.
