The left side of the control panel contains the Generator Set Control (GSC). This is the “main” component of the system, and also displays generator output, generator set functions, fault conditions, and key engine parameters.
The GSC accepts information from the operator, magnetic pickup, oil pressure and water temperature sensors, and optional remote sources. The accepted information is used to determine the “on/off” state of the engine’s air, fuel, and starter.
In the very basic operating conditions, the GSC receives a signal to run the generator set. The GSC turns on the engine’s fuel and starter. When the engine speed reaches the crank termination speed, the starter is disengaged. When the GSC receives a signal to stop the engine, it shuts the fuel off.
GSC Features and Functions:
* Controls normal starting and stopping of the engine.
* Shows engine conditions and generator output information on two displays. The displays also show fault codes and GSC programming information.
* Monitors the system for faults. If a fault occurs, the GSC provides a fault alarm annunciation, or performs a controlled fault shutdown. The GSC uses indicators and displays to describe the fault.
* Contains programmable features for certain applications or customer requirements.
* Cycle Crank – The GSC can be programmed to crank-rest-crank, etc. for adjustable time periods. Refer to SENR5809, Electronic Modular Control Panel II, for programming instructions.
* Electronic Governor Control – When the engine oil pressure increases past the low oil pressure set point, the GSC will indicate to the 2301A or the 8290 (1724/524) Electronic Governor Control that it should increase engine speed from IDLE to RATED rpm.
* Cool Down – Upon receiving a signal to perform a normal shutdown, the GSC will wait a preprogrammed amount of time before shutting the engine down by means of the fuel control.
* Automatic Operation – While in the automatic mode, the GSC can be started by a remote initiate signal (contact closure). Upon loss of the signal (contact opening), the GSC will perform a normal shutdown.
* Alarm Module Communication – The GSC can transmit fault and alarm conditions to alarm module(s).
* Power Down – The Electronic Modular Control Panel II (EMCP II) system is designed to remove power from the GSC when in the off/reset mode and the proper jumper wire is removed. The GSC will not allow the power down until the crank termination relay and the fuel control relay are both “off” for about 70 seconds. If the wire is not removed, the GSC will remain powered up.
Refer to SENR5809, Electronic Modular Control Panel II, for the wiring diagram and the jumper wire location.
* Fuel Solenoid Type – The GSC can be programmed to work with either an energized to run (ETR) fuel system or an energized to shutdown (ETS) fuel system.
* Customer Communication – The GSC is provided with connections for an optional Customer Communications Module (CCM). The CCM will allow two way communication between the EMCP II and a customer-supplied personal computer (PC), or other device with a RS-232C port.
Fault Indicators
The eight fault indicators (1-8), located on the front of the GSC, are used to show and describe a fault that is present. The first seven are red fault shutdown indicators, and the eight is a yellow fault alarm indicator.
* The yellow FAULT ALARM indicator (8) flashes when the GSC detects a fault that is an alarm condition. The engine continues to run and start. The FAULT ALARM indicator is accompanied by an alarm fault code, shown on the upper display (9) when the alarm codes key (10) is pressed. Refer to SENR5809, Electronic Modular Control Panel II, for fault code descriptions, or refer to the decal on the vandal door.
* The red FAULT SHUTDOWN indicator (7) flashes when the GSC detects a fault that is a shutdown condition. The engine is shutdown if it is running and is not allowed to start. The FAULT SHUTDOWN indicator is accompanied by a diagnostic fault code that is immediately shown on upper display (9). Refer to SENR5809, Electronic Modular Control Panel II, for fault code descriptions, or refer to the decal on the vandal door.
* Six red shutdown indicators are dedicated to the following shutdown conditions: low oil pressure (1), emergency stop (2), high water temperature (3), engine overspeed (4), low coolant level (5), and engine over crank (6). When the GSC detects a fault in one of these conditions, the dedicated shutdown indicator (corresponding to the fault) flashes. The engine shuts down if it is running, and is not allowed to start. There are no fault codes associated with the dedicated shutdown indicators because each indicator has an interpretive label. The conditions required for each dedicated fault and the results of each dedicated fault are as follows:
LOW OIL PRESSURE (1) – There are two low oil pressure set points. One set point is for when the engine is operating at idle speed. The other set point is for when the engine is operating at rated speed. The low oil pressure shutdown set points are programmed into the GSC. Condition: the engine oil pressure drops below the set points for low oil pressure shutdown. Result: the LOW OIL PRESSURE indicator flashes, the engine is shutdown and is not allowed to start.
EMERGENCY STOP (2) – Condition: the operator presses the emergency stop push button (ESPB) on the instrument panel. Result: the EMERGENCY STOP indicator flashes, the engine is shutdown and is not allowed to start.
HIGH WATER TEMPERATURE (3) – A high water temperature shutdown set point is programmed into the GSC. Condition: the engine coolant temperature rises above the set point for high water temperature shutdown. Result: the HIGH WATER TEMPERATURE indicator flashes, the engine is shutdown and is not allowed to start.
ENGINE OVERSPEED (4) – An engine overspeed set point is programmed into the GSC. Condition: the engine speed exceeds the engine overspeed set point. Result: The ENGINE OVERSPEED indicator flashes, the engine is shutdown and is not allowed to start.
LOW COOLANT LEVEL (5) – Condition: the engine coolant level drops below the probe of the coolant loss sensor (optional). Result: the ENGINE COOLANT LEVEL indicator flashes, the engine is shutdown and is not allowed to start. An optional low coolant level sensor is required for this function.
OVERCRANK (6) – A set point for total cycle crank time is programmed into the GSC. Condition: the engine does not start within the programmed set point. Result: the OVERCRANK indicator flashes and the engine is not allowed to start.
NOTE: The GSC can be programmed to override the shutdowns for: low oil pressure, high water temperature, and low coolant level faults. When these faults are overridden, the faults are treated as alarm conditions. The corresponding dedicated shutdown indicator is ON CONTINUOUSLY (instead of flashing) and the engine continues to run and start (instead of shutting down). The dedicated shutdown indicator that is ON CONTINUOUSLY means that the set point for the shutdown has been exceeded, but the GSC is programmed to override the shutdown condition and treat the fault as an alarm condition. As provided from the factory, the GSC treats low oil pressure, high water temperature and low coolant level as shutdowns. Refer to SENR5809, Electronic Modular Control Panel II, for programming procedures.