815041 Mercury HOSE

generator set. The GSC+ controls the engine according to the information which is received from the operator and the information that is received from the engine sensors. The GSC+ performs the following functions in normal mode:
Engine starting function
Monitoring of the important GSC+ conditions
Showing the important GSC+ conditions to the operator
Fault detection
Engine stoppingThe operator can identify normal mode by observing the display area. When the GSC+ is in normal mode, all shutdown indicators are OFF. The fault alarm indicator is OFF and "SERV" is NOT SHOWING on the upper display. When the GSC+ is in normal mode, the engine is able to start or the engine is able to run.Note: The optional Customer Communication Module (CCM) can remotely control certain generator set functions. This remote control can only occur when the engine control switch (ECS) is in the AUTO position. See Systems Operation, "System Communication Module (Customer)"for more information.Engine Starting Sequence
The GSC+ receives an engine start signal. The signal will be one of three.
The operator turns the ECS to the Manual Start position.
The ECS is in the AUTO position and the remote initiate contacts (IC) close.
The ECS is in the AUTO position and a start command is sent by the optional Customer Communication Module (CCM).
The GSC+ checks the system before the cranking sequence has begun. The GSC+ checks that no system faults are present. The GSC+ checks that all previous shutdown faults have been reset. Note that shutdown faults are removed by turning the ECS to OFF/RESETposition. The GSC+ also checks that the engine is not already running.
The GSC+ activates the starting motor relay (SMR) and the run relay (RR).
The GSC+ activates the fuel control relay (FCR).
The GSC+ cycle cranks the engine until the cycle crank time reaches the setpoint (P017) for total crank time or until the engine starts. The factory setpoint of the setpoint (P017) is 10 seconds of crank time and 10 seconds of rest time.
While the starting motor is cranking, the GSC+ shows the status of the relays on the relay status indicators of the lower display.
ETR fuel systems: K4 (SMR), K5 (RR), K7 (FCR)
ETS fuel systems: K4 (SMR), K5 (RR)
The GSC+ deactivates the starting motor relay (SMR) and the GSC+ activates the crank termination relay (CTR) when the engine speed reaches the setpoint P011 for crank terminate speed. The factory default of setpoint P011 is 400 rpm.
The GSC+ activates the electronic governor relay (EGR) when the oil pressure reaches setpoint P014. Setpoint P014 is for low oil pressure at idle speed. The factory default of setpoint P014 is 70 kPa (10 psi). The EGR signals the electronic governor (EG) in order to accelerate the engine to the rated speed. This happens if the machine is equipped with the EG.Note: The electronic governor relay (EGR) is not used on "8NS" or "9ES" generator sets.Note: The optional customer communication module (CCM) can remotely activate the EGR when the low oil pressure setpoint is exceeded. The optional customer communication module can remotely deactivate the EGR when the low oil pressure setpoint is exceeded.
The GSC+ shows the following information.
Information for one or more phases on the upper display
Information for power meter on the lower display
Information for the engine system on the lower display
The relay status of K1 (EGR), K3 (CTR), K5 (RR), and K7 (FCR) on the lower displayEngine Stopping Procedure
The GSC+ will receive an engine stop signal. The signal will be one of three.
The operator turns the ECS to the STOP position.
The ECS is in the AUTO position and the remote initiate contacts (IC) open.
The optional customer communication module (CCM) sends a stop command to the GSC+ while the ECS is in the AUTO position and while the remote initiate contacts are open.
After receiving the stop signal, the GSC+ checks that there are no present system faults.
The GSC+ begins the cooldown time. The cooldown time is the setpoint P019. The factory default of setpoint P019 is five minutes.
The GSC+ may now activate the spare output. The spare output is activated only if the spare output SP07 has been programmed. The spare output can activate the slave relay during the cooldown cycle. The optional circuit breaker is then activated and this takes the generator off load.
After the cooldown cycle (setpoint P019), the GSC+ deactivates the run relay (RR). The electronic governor relay is deactivated after the engine oil pressure decreases to less than the setpoint for low oil pressure shutdown at idle speed (SP14). The GSC+ shuts off fuel by deactivating the fuel control relay (FCR).
When the engine speed reaches zero rpm, the GSC+ deactivates the crank terminate relay (CTR) and a restart is now allowed.Before the engine speed reaches 0 rpm, a restart of the engine is possible. When the GSC+ receives an engine start signal, the GSC+ turns on the fuel and the GSC+ allows the engine to run. If the engine does not run, the starting motor relay (SMR) does not activate until the crank termination relay (CTR) is deactivated at 0 rpm.
The GSC+ shows the status of the relays on the relay status indicator of the lower display. All relay indicators should be "OFF" except the ETS systems. On the ETS systems, the "K7" indicator remains active for 70 seconds after the engine speed and oil pressure are at zero.Note: The engines can be shut down immediately by turning the ECS to the OFF/RESET. The cooldown timer is bypassed and the spare data output is deactivated.