PUMP GP-FUEL PRIMING 4672659 - Caterpillar

shutdown mode prevents damage to the generator set when a shutdown fault is occurring. A shutdown fault is critical. When a shutdown fault occurs, the GSC automatically activates shutdown mode until the shutdown fault is corrected. The GSC shuts down the engine when the GSC is in shutdown mode. The GSC prevents starting of the engine and the GSC alerts the operator. The GSC alerts the operator and the GSC identifies the shutdown fault by FLASHING the corresponding shutdown indicator. The name of the shutdown indicator identifies the shutdown fault. Shutdown Indicators
Low oil pressure
Emergency stop
High water temperature
Engine overspeed
Low coolant level
Engine overcrank
Fault shutdownIf the fault shutdown indicator is the only indicator FLASHING, additional information is available. A fault code is shown on the upper display which more precisely identifies the cause of the shutdown fault. See Systems Operation, "Fault Description" for more information. Shutdown Mode Sequence
A shutdown fault occurs and the GSC detects the shutdown fault.
To shut off the fuel, the GSC deactivates the fuel control relay (FCR). On EUI engines, in order to shut off the fuel, the GSC deactivates the electronic governor relay (EGR).
In order to prevent the engine from starting, the GSC deactivates the run relay (RR), and the GSC deactivates the starting motor relay (SMR).
In order to remove the generator load, the GSC activates the generator fault relay (GFR). This activates the circuit breaker shunt trip coil.Note: The spare output may also be programmed to activate when a shutdown occurs. This output can drive a relay in order to open the circuit breaker, or the output can open a transfer switch. See Systems Operation, "Spare Input/Output Programming OP6".
When the engine speed reaches 0 rpm, the GSC deactivates the crank termination relay (CTR). The electronic governor relay (EGR) is deactivated when the engine oil pressure reaches the setpoint (P14) for low oil pressure shutdown at the idle speed 70 kPa (10 psi).
The GSC FLASHES the corresponding shutdown indicator. If the fault shutdown indicator is FLASHING, a fault code is shown on the upper display. See Systems Operation, "Fault Description".
If the fault shutdown indicator is the only indicator FLASHING, additional information is available. A fault code is shown on the upper display that more precisely identifies the cause of the shutdown fault. See the Systems Operation, "Fault Description".
The lower display continues to show the engine data.
The relay status indicators show.
K2 (GFR)Engine Starting Sequence
Correct the shutdown fault. See the Testing And Adjusting, "Fault Identification".
Reset the GSC by turning the ECS to "OFF/RESET". If no shutdown fault is active, the GSC returns to normal mode and the engine is able to start.