© 2022 Staheli West
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Generator Controller (2015-2016)
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3.5 LED Layout
Front View of GSC300
Figure 4
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3. Controller Operation
3.1 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. Removing power while the controller is in the RUN
mode may corrupt the EEPROM. If this occurs, the GSC300 will have to be reprogrammed.
3.2 General Failure Conditions
The following conditions can cause the GSC300 controller to shutdown the engine-generator system
unexpectedly.
To reset a failure press the Off key for 3 seconds.
This will exit the FAILURE mode and take the
controller back to the OFF mode.
Auxiliary Failure (“XTR_FAIL”)
Extra failure is indicated by a flashing 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 flashing RED Overspeed LED
The General Failure output annunciation is triggered during any of the above failure conditions and
is rated 300mA Max.
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 defined
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
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2.6 Back Panel Layout
4
STARTER OUTPUT
3
B
5
BATTERY GROUND
2
B
6
BATTERY GROUND
1
FUEL OUTPUT
7
PRE-HEAT COM
8
PRE-HEAT NO
40
A
40
A
40
A
PRE-HEAT
RELAY
FUEL
RELAY
CRANK
RELAY
9
10
22
21
20
19
18
17
16
15
14
13
12
11
LOW BATTERY OUTPUT
OVER-SPEED OUTPUT
OVER-CRANK OUTPUT
PROGRAMMING
CONNECTOR
SPEED SIGNAL
INPUTS
HIGH TEMP. OUTPUT
LOW OIL OUTPUT
AUX SWITCH INPUT
NOT IN AUTO OUTPUT
ENGINE RUN OUTPUT
GENERAL FAIL OUTPUT
OIL SWITCH INPUT
REMOTE START INPUT
TEMP. SWITCH INPUT
MODE SWITCH
ON
OFF
Figure 3
DewPoint machines AB000243 and earlier need to be factory programmed to work with oil
pressure sending units, or the sending units need to be replaced with oil pressure switches.
Reset faults by holding red “OFF” button for 3 seconds.