Circuit Condition - Run - Generac Power Systems GP Series Diagnostic And Repair Manual

Section 2 Engine DC Control System

Circuit Condition - Run

Once the engine has started, the start-run-stop switch (SW1) is released and returns to the run position. At his point
SW1 is not activated. This action will de-energize the starter contactor relay (SCR) causing the starter motor to
disengage.
The printed circuit board holds wire 229 to ground. This action holds the start stop relay (SSR) energized. With the
SSR energized, wire 14 maintains 12 VDC to the fuel shutoff solenoid. Once the voltage regulator starts functioning,
the field boost circuit is no longer a factor in operation. With the SSR energized wire 15B maintains 12 VDC to the
printed circuit board. With the SSR energized, wire 18 is not grounded and the magnetos continue to produce voltage
to the spark plugs.
The two independent battery charge windings are now producing AC voltage and supplying this to BCR1 and BCR2.
The AC voltage is rectified through BCR1 and used to supply DC voltage to the 12 VDC accessory outlet.
The AC voltage is rectified through BCR2 and used to supply DC voltage to the battery for battery charging.
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