AUTOMATIC START/STOP SYSTEMSYSTEMS OPERATIONCONTROL PANELThe main function of the control panel is to con-trol the start and shutoff of the engine.AUTOMATIC START/STOP CONTROL PANEL1. Overcrank light (OCL). 2. Low lubricating oilpressure light (OPL). 3. Overspeed light (OSL). 4.Automatic control switch (ACS). 5. High watertemperature light (WTL).The engine control on the automatic start/stopcontrol panel is an automatic control switch (ACS) withfour positions. The positions of switch (4) are: OFF/RESET, AUTO, MAN and STOP. Each light (i), (2), (3)and (5) goes ON only when a not normal condition in theengine stops the engine. The light for the condition inthe engine that stopped the engine is ON even after theengine has stopped. Switch (4) must be moved to theOFF/ RESET position for the light to go OFF. Each lightwill go ON, for a light test, when the light is pushed inand held in.When the generator is to be used as a standbyelectric power unit, the automatic control switch is put inthe AUTO position. Now, if the normal (commercial)electric power stops, the engine starts and the generatortakes the electric load automatically. When the normal(commercial) electric power is ON again, for the electricload, the circuit breaker for the generator electric powerautomatically opens and the generator goes off theelectric load. After the circuit breaker for the generatoropens, the engine automatically stops.When the automatic control switch (ACS) is movedto the MAN position, the engine starts. It isnow necessary for the circuit breaker for the generatorelectric power to be closed manually. If the generator isa standby electric power unit and the automatic controlswitch (ACS) is in the MAN position when normal(commercial) electric power is ON again, the generatorcircuit breaker opens and the engine stops automaticallythe same as when the switch (ACS) is in the AUTOposition.The engine will stop with the automatic control switch(ACS) in either the AUTO or MAN positions if there is anot normal condition in the engine. The not normalcondition in the engine that can stop the engine is eitherlow lubricating oil pressure, high engine coolant (water)temperature or engine overspeed (too much rpm).When any of these conditions stops the engine, the lightfor the not normal condition will stay ON after the engineis stopped. The fourth not normal condition light is ONonly when the starter motor runs the amount of secondsfor the overcrank timer (engine does not start).Move the automatic control switch (ACS) to the OFF/RESET position and the not normal condition lights goOFF.ELECTRIC SETThe components of the electric set are: the engine,the generator, the starter motor, the battery, the shutoffsolenoid and signal switches on the engine. The electricset gives emergency power to drive the load.An explanation of each of the signal components isgiven in separate topics.WIRING DIAGRAMSThe following wiring diagrams are complete to showthe connections of the automatic start/stop componentswith the engine terminal strip (TSI). The diagrams showall available options for both the hydraulic governorapplication or the PSG Governor application.For a more complete explanation of operation of theautomatic start/stop system, refer to Floor StandingSwitchgear Form No. SENR7970.15
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