DKG-309 User Manual V-02
(11.05.2009)
- 13 -
5. MODES OF OPERATION
The modes of operation are selected by pushing the front panel keys. Changing the operation
mode while the genset is running will result into a behavior suitable for the new operating mode. For
example, if the LOAD TEST mode is selected when genset is running at TEST mode, then the genset will
take the load.
OFF:
In this mode, the mains contactor will be energized if mains phase voltages are within the
programmed limits. The engine will be stopped.
AUTO:
It is used for genset and mains automatic transfer. If at least one of the mains phase voltages is
outside limits, the mains contactor will be deactivated.
The diesel will be started for programmed times after the preheat timer. When the engine runs, the crank
relay will be immediately deactivated. The engine will run without load during engine heating period. After
this, if alternator phase voltages and frequency are within limits, then the unit will wait for the generator
contactor period and the generator contactor will be energized.
When all the mains phase voltages are within the limits, the engine will continue to run for the mains
waiting period. At the end of this period the generator contactor is deactivated and the mains contactor will
be energized. If a cooldown period is given, the generator will continue to run during cooldown period. At
the end of the period, the fuel solenoid will be de-energized and the diesel will stop. The unit will be ready
for the next mains failure.
If the operation of the genset is disabled by the
weekly schedule
, then the
AUTO
led will flash, and the
operation of the genset will be as in the
OFF
mode.
TEST:
It is used to test the generator when the mains are on, or keep the generator running in the
emergency backup mode. The operation of the generator is similar to the AUTO mode, but the mains
contactor will not be deactivated if the mains are not off. If the mains are off, mains contactor will be
deactivated and the generator contactor will be activated. When the mains are on again, a changeover to
the mains will be made, but the engine will be kept running unless another mode is selected. To stop the
engine, select
AUTO
or
OFF
mode.
LOAD TEST:
It is used to test the genset under load. Once this mode is selected, the engine will run and
the load will be transferred to the genset. The genset will feed the load indefinitely unless another mode is
selected.
6. OTHER FEATURES
6.1 Remote Start Operation
The unit offers the possibility of
REMOTE START
mode of operation. If the
Remote Start
Operation
program parameter is set to
1
then the unit will enter to the Remote Start operation. The
Remote Start signal should be connected to the
SPARE_2
(
37
) input.
The REMOTE START signal may be a NO or NC contact, switching to either battery positive or
battery negative. These selections are made using programming menu.
It is also necessary to set the
ACTION
program parameter of the
SPARE-2
input to
3
in order to
prevent the alarms generated from this input.
In this mode the mains phases are not monitored. If the REMOTE START signal is present
then the mains will be supposed to fail, inversely if the REMOTE START signal is absent, then mains
voltages will be supposed to be present. The front panels mimic diagram’s mains LEDs will reflect the
status of the REMOTE START input.
