CONTROL PANEL (TYPE 5)SYSTEMS OPERATIONManual ShutdownWhen engine control switch (ACS) is turned to the STOP position orOFF/RESET position, contacts (10 and 11) are open. With contacts(10and 11) open, the run relay (RR) de-energizes.When run relay (RR) is de-energized, contact (RR2) closes andcontact (RR1) opens. With (RR2) closed, it completes a circuit to theshut-off solenoid (SS). With contact (RR1) open, the arming relay (AR)is de-energized.After the engine stops, (TDX) will open to de-energize the shutoffsolenoid.NOTE: TDX will remain closed for 70 seconds after the engine oilpressure switch (OPS) has gone to its normally closed position.Diode DI helps prevent electrical sparks (arcing) at the contacts inthe shutoff solenoid circuit when the shutoff solenoid is de-energized.NOTE: The shutdown solenoid (SS) is protected against overloadby a circuit breaker (CB1). If the engine does not shut down whenthe ACS is turned to STOP, check the condition of CB1. Press toreset. [Button DOES NOT pop out when breaker is tripped].250
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