Electronic Modular Control Panel II (EMCP II) For MUI Engines Caterpillar

The normal mode monitors the generator set and the normal mode controls the generator set. The GSC controls the engine through information that is received from panel switches, controls, and engine sensors. The GSC performs the following functions in normal mode.

• Starting the engine

• Monitoring of important generator set conditions

• Showing important generator set conditions to the operator

• Fault Detection

• Engine Stopping

The operator can identify the normal mode by observing the display area. When the GSC is in the 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 run.

Note: The optional Customer Communication Module (CCM) can remotely control certain generator set functions. This remote control can only occur when the ECS is in the AUTO position. See Systems Operation, "Customer Communication Module (CCM)" for more information.

Engine Starting Sequence

1. The GSC will receive 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).

2. The GSC checks the system before the cranking sequence is 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/RESET. The GSC also checks that the engine is not already running.

3. The GSC activates the starting motor relay (SMR) and the run relay (RR).

4. The GSC activates the fuel control relay (FCR) for ETR fuel systems or the GSC leaves the fuel control relay (FCR) deactivated for ETS fuel systems.

5. The GSC cycle cranks the engine until the cycle crank time reaches the setpoint (P17) for total cycle crank time or until the engine starts. The factory default of setpoint P17 is 10 seconds crank time and 10 seconds rest.

6. 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)

7. The GSC deactivates the starting motor relay (SMR) and the GSC activates the crank termination relay (CTR) when the engine speed reaches the setpoint P11 crank terminate speed. The factory default of setpoint P11 is 400 rpm.

8. The GSC activates the electronic governor relay (EGR) when the oil pressure reaches the setpoint P14 for low oil pressure at idle speed. The factory default of setpoint P14 is 70 kPa (10 psi). The EGR signals the electronic governor (EG) to accelerate the engine to rated speed.

   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 (CCM) can remotely deactivate the EGR when the low oil pressure setpoint is exceeded.

9. The GSC shows AC voltage, current, and frequency for one phase at a time on the upper display. The GSC shows system battery voltage, engine hours, engine rpm, oil pressure, and coolant temperature on the lower display. The GSC shows the relay status on the relay status indicators of the lower display. K1, K3, K5, K7 is shown for ETR fuel systems. K1, K3, K5 is shown for ETS fuel systems.

Engine Stopping Sequence

1. 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 ECS is in the AUTO position and a stop command is sent by the optional Customer Communication Module (CCM).

2. After the engine stop signal is received, the GSC checks that no system faults are present.

3. The GSC begins the adjustable cooldown time (setpoint P19). The factory default of setpoint P19 is five minutes.

4. The GSC may now activate the spare output. This only occurs if the spare output SP07 has been programmed. The spare output can activate a slave relay during the cooldown cycle. The optional circuit breaker is then activated and this takes the generator off load.

5. After the cooldown cycle (setpoint P19), the GSC deactivates the run relay (RR). The electronic governor relay (EGR) is deactivated after the engine oil pressure decreases to less than the setpoint for low oil pressure shutdown at idle speed (P14).

   The GSC shuts off the fuel by deactivating the fuel control relay (FCR) for ETR systems.

   The GSC shuts off the fuel by activating the fuel control relay (FCR) for ETS systems. On ETS systems, after engine speed drops below 40 rpm and oil pressure drops below 80 kPa (12 psi), the GSC holds the fuel control relay (FCR) for an additional 70 seconds.

6. When engine speed reaches zero rpm, the GSC deactivates the crank terminate relay (CTR) and a restart is now allowed.

   If the GSC receives a start signal before the engine speed reaches zero rpm. Then 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.

7. The GSC shows the status of the relays on the relay status indicators of the lower display. All relay indicators should be OFF, except on ETS systems. On ETS systems, the K7 (FCR) indicator remains ON for 70 seconds after engine speed and oil pressure are at zero,.

Note: The engine may be shutdown by turning the ECS to OFF/RESET. The cooldown timer is bypassed and the spare data output is deactivated.