3B2-87123-0 Tohatsu PISTON RING SET (STD)

Illustration 1 g00474240
Display Area Of Generator Set Control (GSC) (1) Dedicated shutdown indicators. (2) Fault shutdown indicator. (3) Fault alarm indicator. (4) Upper display. (5) Lower display. (6) Keypad.The main component of the EMCP II system is the generator set control (GSC). The GSC is designed to operate when powered by 24 DCV or 32 DCV battery systems. The GSC monitors and controls many of the generator set functions. The GSC has the following functions and features.
The GSC controls starting and stopping of the engine
The GSC shows engine conditions and generator output information on two displays. The displays also show fault codes and GSC programming information.
The GSC monitors the system for faults. If a fault occurs, the GSC performs a controlled fault shutdown, or the GSC provides a fault alarm annunciation. The GSC uses indicators and displays to describe the fault to the operator.
The GSC contains programmable features for certain applications or customer requirements.Note: To ensure proper operation on 3500B EPG engines, the GSC setpoint P23 must be set to 2. Failure to do this will result in improper 3500B EPG engine operation and incorrect display of engine parameters. Refer to Systems Operation, "Engine/Generator Programming" for more information.Fault Indicators
The eight fault indicators are used to show that a fault is present. The fault indicators describe the fault. The fault indicators are divided into three groups: fault alarm indicator (3), fault shutdown indicator (2) and dedicated shutdown indicators (1). The yellow fault alarm indicator (3) FLASHES when the GSC detects an alarm fault. The alarm fault does not cause the engine status to change. If the engine was running when the alarm fault occurred, then the engine will continue to run. The engine will be able to start. Fault alarm indicator (3) is accompanied by a fault code that is shown on upper display (4) when the alarm codes key is pressed. The red fault shutdown indicator (2) FLASHES when the GSC detects a fault that is a shutdown fault. The engine is shut down if it is running and the engine is not allowed to start. Fault shutdown indicator (2) is accompanied by a fault code that is immediately shown on upper display (4). The red dedicated shutdown indicators (1) represent the following shutdown faults: low oil pressure, emergency stop, high water temperature, engine overspeed, low coolant level and engine overcrank. When the GSC detects a fault in one of these areas, the dedicated shutdown indicator that corresponds to the fault FLASHES. If it is running, the engine is shut down and not allowed to start. There are no fault codes associated with the dedicated shutdown indicators because each indicator has a descriptive label. Many of the dedicated shutdown faults depend on certain setpoints in the GSC. See Systems Operation, "Engine/Generator Programming OP5". To restart the engine after a shutdown, see Systems Operation, "Shutdown Mode". The conditions required for each dedicated fault are in the following list. The results of each dedicated fault are in the following list.Low Oil Pressure - The engine oil pressure drops below the setpoints for low oil pressure shutdown that are programmed into the GSC. There are two low oil pressure setpoints. One setpoint is for when the engine is at idle speed. One setpoint is for when the engine is at rated speed. When this fault occurs, the low oil pressure indicator FLASHES. The engine is shut down. The engine is not allowed to start until the fault is corrected.Emergency Stop - The operator presses the emergency stop push button (ESPB) on the instrument panel. When this condition occurs, the emergency stop indicator FLASHES. The engine is shut down. The engine is not allowed to start until the condition is corrected.High Water Temperature - The engine coolant temperature rises above the setpoint for high water temperature shutdown that is programmed into the GSC. When this fault occurs, the high water temperature indicator FLASHES. The engine is shut down. The engine is not allowed to start until the fault is corrected. Engine Overspeed - The engine speed exceeds the setpoint for engine overspeed that is programmed into the GSC. When this fault occurs, the engine overspeed indicator FLASHES. The engine is shut down. The engine is not allowed to start until the fault is corrected.Low Coolant Level - The engine coolant level drops below the probe of the coolant loss sensor (optional). When this fault occurs, the engine coolant level indicator FLASHES. The engine is shut down. The engine is not allowed to start until the fault is corrected.Overcrank - The engine does not start within the setpoint for total cycle crank time that is programmed into the GSC. When this fault occurs, the overcrank indicator FLASHES. The engine is not allowed to start until the fault is corrected. Note: The GSC can be programmed to override the shutdown for low oil pressure, high water temperature and low coolant level. When the shutdown faults are overridden then the faults are treated as alarm faults. The corresponding dedicated shutdown indicator is ON CONTINUOUSLY (instead of flashing). The engine continues to run instead of shutting down. The dedicated shutdown indicator that is ON CONTINUOUSLY means that the setpoint for shutdown has been exceeded, but the GSC is programmed to override the shutdown fault and treat the fault as an alarm fault. The factory programs the GSC to treat low oil pressure, high water temperature and low coolant level as shutdowns. The operator must make a decision to override these shutdown faults.Display
Illustration 2 g00474240
Display Area Of Generator Set Control (GSC) (1) Dedicated shutdown indicators. (2) Fault shutdown indicator. (3) Fault alarm indicator. (4) Upper display. (5) Lower display. (6) Keypad.The upper display (4) and lower display (5) of the GSC provide information about the generator set. Note: For exceptions to the following descriptions, see Table 2, "GSC History". Upper display (4) shows AC voltage, current and frequency of one phase of the generator output. Each phase can be viewed one at a time by pushing the phase select