CONTROL PANEL (TYPE 2)
SYSTEMS OPERATION
Engine Starts
At 600 rpm, underspeed switch (USS) closes. Oil
pressure increases. This activates oil pressure switch
(OPS). The normally closed contact opens and the
normally open contact closes. The arming relay (AR) is
now connected across battery voltage. Contacts (AR1)
close and lock in the arming relay. Contacts (AR2) close
to help complete a circuit to rack solenoid (RS) for
shutdown. Contacts (AR3) open. This de-energizes
magnetic switch (MS). (MS) contacts open to de-
energize pinion solenoid (PS). (PS) contacts open to
de-energize starting motor (SM). Contacts (AR4) open
to de-energize overcrank timer (OCT).
CONTROL PANEL WITH ELECTRONIC SPEED SWITCH
AUTOMATIC POSITION-ENGINE STARTS
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