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Generating set operation _________________________________________________________________________________________________________________________________
In
Auto
mode, when one of the three start-up conditions changes (see paragraph 2.3), the Stand-by contactor opens automatically, the Mains contac-
tor closes after the S¢M toggle delay and the engine enters into a cooling down phase. At the end of the cooling down period, the engine stops and
the generating set is on stand-by again.
In
Test
mode, at the end of the
Test
mode operation delay (screen display), the generating set stops instantly without any cooling down period as the
Test
mode is a no-load operation.
Note: when a fault appears, the engine shutdown is immediate or delayed depending on the nature of the fault and the factory programming.
18 GGES OOPERATION
By selecting the
GES
menu using the key, the
GES
unit screen is displayed:
The first line indicates the generating set running time in normal operation.
The second line indicates the generating set running time with safety features inhibited.
Press
Esc
to return to the
GENERAL
screen.
19. AATS OOPERATION
The ATS (or Mains/Stand-by changeover switch) is used to perform the automatic switching of energy sources when the main source (the mains) fails.
In the factory standard configuration, the operator is informed of the Mains and Stand-by contactors position on the display module panel face (LEDs
for
0
and
1
buttons):
- Stand-by contactor closed
- Mains contactor closed
However, if the user does not cable the Mains and Stand-by contactors auxiliary contacts, the LEDs for buttons
0
and
1
will never come on and the
following messages will continuously appear:
Alarm MMains oopen
Alarm SStand-bby oopen
If the user does not want to cable the contactors feed back data, the setups will have to be changed (consult the agent or technical sup-
port team).
The operations described below are valid with an ATS from our range and with the factory standard configuration.
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When is positioned in
Stop
mode, the Mains contactor is closed (mains available) and the
0
button
LED is lit. The Mains contactor control on interface board CB or CB12 is idle (contact closed).
If the mains disappears, the Mains contactor opens, its auxiliary contact opens too, the screen oppo-
site appears and the general alarm LED flashes.
The message
ext ccommand=1
appears on screen as soon as the external command input is active.
The operator must select the
Auto
mode for the generating set to be able to start.
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When is positioned in
Auto
mode, the Mains contactor is closed (mains available), the
0
button LED is lit. The Mains contactor control on
interface board CB or CB12 is idle (contact closed).
If the mains disappears, the Mains contactor opens, its auxiliary contact opens too, the external command input is activated and one of the
two screens below appears.
screen 1
screen 2
Screen 1 means that the mains failure delay is set to 0 or that type 1 starting mode has been selected ( built-in mains failure delay is ignored). The
generating set begins its automatic starting phase.
Screen 2 means that the generating set is going to start after the built-in mains failure delay (type 2 starting mode).
Whatever the screen (1 or 2), the message
Alarm MMains oopen
is displayed and the
0
button LED flashes, telling the operator that the Mains contactor
is in a transitional status. The LED stops flashing and the message disappears as soon as the green LED comes on.
Note: The Mains contactor opening control is activated, thus avoiding it from closing if the mains returned.
In this case, all messages associated with the Mains/Stand-by changeover operation will be displayed.
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