Northern Lights OGSC300 Operator's Manual - page 13
OGSC300 08/12
7
3 CONTROLLER OPERATION
OFF/AUTO/RUN Modes On power up the controller defaults to the mode it was in when power was last removed (AUTO or
OFF). OFF mode can be entered by pressing the OFF button on the front panel. When the GSC300 is in the OFF mode the “Not
In Auto” LED will be lit on the front panel (NOT IN AUTO below).
When the GSC300 is in the OFF mode, starting – either from the remote start contacts or from the front panel run button – is
disabled. To start the genset the GSC300 needs to be placed in the AUTO mode by pressing the AUTO button on the front panel.
Once in AUTO mode the genset can be started by pressing the RUN button. Once crank success is achieved (i.e. engine has
started), the GSC300 enters the RUN mode and the front panel ENGINE RUNNING LED will be lit.
GENERAL FAILURE CONDITIONS: The following conditions can cause the GSC300 controller to shutdown the
engine-generator system unexpectedly:
Auxiliary Failure (“XTR_FAIL”)
Extra failure is indicated by a fl ashing RED Low oil pressure LED
Low Oil Pressure
Low Oil pressure is indicated by a steady on RED Low oil pressure LED
High Coolant Temperature
High coolant temperature is indicated by a steady on RED High water temp LED
Overcrank
Overcrank failure is indicated by a steady on RED Overcrank LED
Overspeed
Overspeed failure is indicated by a steady on RED Overspeed LED
Loss of Speed (“SPDLOSS”)
Loss of speed signal is indicated by a fl ashing RED Overspeed LED
NOT IN AUTO: When the controller is in the OFF Mode, the NOT IN AUTO LED will illuminate and the NOT IN AUTO Output will
be triggered. During this OFF mode Automatic engine starting is disabled. The LCD display will read “OFF”, and the backlight on
the LCD display will be off.
NOTE: + Battery must be permanently connected to the main power terminal for the NOT IN AUTO feature.
LOW BATTERY VOLTAGE ALARM: When the battery voltage drops below the user defi ned set point which can be programmed
between 7 and 35VDC, the engine controller displays a Low Battery Condition. The Low battery warning Led will be illuminated
at any time during OFF, AUTO and Manual run modes. The LCD display will indicate the message: “LOW_BATT”. The LOW
battery warning will be disabled during failure conditions.
LOW OIL INPUT: The Low Oil Input can be wired to a resistive sender or from a NO or NC type switch. NO / NC refers to the
state of the contacts during normal engine operation (engine oil pressure ok). When utilizing a resistive sender the display units
are fi xed in PSI by the PC programming interface, and a failure set-point must be selected from the programming menu.
Note: The oil input failure is disabled during the Oil Bypass time.
HIGH TEMPERATURE INPUT: The high temperature input can be wired to a resistive sender or from a NO type switch. For
proper operation while using a switch, the switch must be the NO type which closes to ground upon failure. When utilizing
a resistive sender the display units are fi xed in Fahrenheit by the PC programming interface, and a failure set-point must be
selected from the programming menu. Note: The engine temperature failure is disabled during the Oil Bypass time.
FUEL LEVEL/AUXILIARY INPUT: The Fuel level/Aux input can be wired to a resistive sender or from a NO type switch. For
proper operation while using a switch, the switch must be the NO type which closes to ground upon failure. If this input is used
as a sender, no failure will be indicated. The sender option is solely for Fuel Level/Auxiliary Level Display on the LCD. Northern
Lights, Inc. uses this input to connect the engine shutdown switches as a backup to the primary shutdown inputs.
SPEED SIGNAL SENSITIVITY: The controller will accept to a maximum of 300VAC, 60Hz from direct generator output for speed
sensing. The following values are minimal recommended voltages for speed signal sensing:
20Hz - .075V (75mV)
60HZ - .6V (600mV)
HOUR METER: The controller displays a log of total accumulated generator running hours. Generator Run times will be
displayed on the controllers display screen. The display represents both hours and minutes in the form 123456:7. The last digit
on the hour meter will represent the time in 1/10 of an hour. Please note that although the hour meter displays time in hours and
minutes, it will record up to the nearest second. If the generator was operated for a 3 minute period and then stopped the running
time is stored in permanent memory and then adding to the next running period. The same would be true if the controller were to
enter a failure mode as the controller would permanently store the remaining time for the next running cycle.
Updated 8-2-12
3-1 CONTROLLER OVERVIEW