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| Illustration 1 | g00395939 |
Instrument Panel Switches on generators with 3412 and 3456 engines (1) Pump Stop Switch (option) (2) Start Aid Switch (SAS) (option) (3) Pump Run Switch (option) (4) Voltage Adjust Rheostat (VAR) (5) Panel Light Switch (PLS) (6) Speed Potentiometer (SP) (option) or Governor Switch (GS) (option) (7) Emergency Stop Push Button (ESPB) (8) Engine Control Switch (ECS) | |
The engine control switch (ECS) (8) determines the status of the control panel. When the ECS is in the AUTO position, the GSC+ allows the operator to remotely control the generator set with the Customer Communication Module. When the ECS is in the AUTO position, the GSC+ allows the operator to remotely monitor the generator set with a Customer Communication Module. See Systems Operation, "Customer Communication Module". The GSC+ allows the engine to start whenever the remote initiate contact is closed. The engine shuts down after the remote initiate contacts open. The cooldown period for the engine is programmable. The cooldown period can be programmed with setpoint P019. The setpoint can be programmed to give a 0 to 30 minute cooldown period before the engine shuts down. The cooldown period for the engine is set for five minutes at the factory. The engine starts and the engine runs while the ECS is in the MANUAL START position. When the ECS is in the COOLDOWN/STOP position, the fuel control solenoid shuts down the engine after a cooldown. When the ECS is in the OFF/RESET position, the engine shuts down immediately. Any fault indicators are reset with the exception of the emergency stop while the ESPB is pushed in.
If the red emergency stop push button (ESPB) (7) is pressed, the fuel is shut off. The operator must turn the ESPB (7) clockwise until the ESPB releases in order to restart the engine. Next turn the ECS to OFF/RESET and then turn the ECS to the MANUAL START.
The voltage adjust rheostat (VAR) (4) connects to the voltage regulator and the VAR is used to adjust generator voltage to the desired level. The VAR is used in place of the voltage level rheostat. The voltage level rheostat is located on the generator voltage regulator.
The speed adjust potentiometer (SP) (6) is optional. The speed adjust potentiometer (6) is used to raise the engine speed when an electronic governor is used. The speed adjust potentiometer (6) is used to lower the engine speed when an electronic governor is used. A governor switch may be mounted in this location if a governor motor is used.
The panel light switch (PLS) (5) turns ON the panel lamps and turns OFF the panel lamps.
The pump run switch is optional on generators with 3412 engines. The pump run switch (3) is used in conjunction with the automatic fuel transfer system that is mounted on the generator set, if equipped. The AC fuel transfer pump that is mounted on the generator set will fill the day tank of the generator set when the operator pushes the pump run switch. The pump will automatically shut off when the fuel level contactor reaches the high fuel level. The pump can be shut off manually by pressing the pump stop switch.
The pump stop switch is optional on generators with 3412 engines. The pump stop switch (1) is used in conjunction with the automatic fuel transfer system that is mounted on the generator set, if equipped. The pump stop switch is used to manually stop the AC fuel transfer pump.
The optional start aid switch (SAS) (2) is present only on required generator sets. There are two types of starting aid systems.
- Manual shot type of system is for metered shot type of system
- Automatic starting aid is for continuous flow starting aid systems
On manual starting aid systems, when the SAS (2) is held in the ON position (momentary contact), the metered shot type of system is activated. A specific amount of ether is metered into a holding chamber. When SAS (2) is released, a solenoid allows ether to flow to the engine. The metered shot type of system deactivates when the following conditions are present:
- The contacts of the crank termination relay (CTR) open at approximately 400 RPM.
- The engine coolant temperature is sufficient to open the start aid temperature switch (SATS).
- The SAS (2) is released to the OFF position.
| NOTICE |
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Crank the engine before you activate the metered shot start aid system. Keep SAS in the OFF position. Damage to the engine is possible by activating the system when the engine is not turning. |
On automatic starting aid systems, the continuous flow starting aid system operates in the automatic mode or the manual mode. When the SAS is in the AUTO position, the automatic mode is activated. The system automatically injects ether during the crank cycle. When the SAS is held in the MAN position, the manual mode is activated. The operator controls the amount of time that the ether is injected during the crank cycle. The manual mode also allows the operator to inject more ether after crank termination. This additional ether is used on cold engines that continue to detonate. The automatic mode deactivates when the following conditions are present:
- The contacts of the crank termination relay (CTR) open at approximately 400 RPM.
- The engine coolant temperature is sufficient to open the start aid temperature switch (SATS).
- The SAS (2) is released to the OFF position.