DKG-307 User Manual V-37 (01.03.2012)
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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 TEST mode is selected when genset is running at RUN mode, then the genset will take
the load.
STOP: 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.
RUN: 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.
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.
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