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Page 21 – Generac Power Systems Recreational Vehicle Generator 5413 User Manual

Page 23

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Section 5

ENGINE DC CONTROL SYSTEM

Page 21

5 Flashes = Low Oil Pressure

4 Flashes = Overspeed

3 Flashes = Overcrank

2 Flashes = Low Battery

6 Flashes = High Oil Temperature

SC - STARTER CONTACTOR

TB - TERMINAL BLOCK, 4 TAB

SP2 - SPARK PLUG, CYL. 2

SP1 - SPARK PLUG, CYL. 1

LED - ALARM INDICATOR
LOP - LOW OIL PRESSURE SWITCH

SCR - STARTER CONTACTOR RELAY
SM - STARTER MOTOR

SW1 - PRIME/START-RUN-OFF SWITCH

FS - FUEL SOLENOID

FP - FUEL PUMP

F1 - FUSE, 7.5A

CH - CHOKE HEATER
CS - CHOKE SOLENOID

IMS - IGNITION MODULE STUD

IM2 - IGNITION MODULE, CYL. 2

HTO - HIGH OIL TEMPERATURE SWITCH
IM1 - IGNITION MODULE, CYL. 1

GRD1 - CONTROL PANEL GROUND
GRD2 - UNIT GROUND STUD

BA - BRUSH ASSEMBLY
CB 1 / CB 2 - SEE CHART

LEGEND

= 12 VOLTS DC

= ALARM CONTROL (PCB)

= DC CONTROL VOLTAGE (PCB)

= SHUTDOWN CONTROL (PCB)

= GROUND

= GROUND CONTROL (PCB)

= FIELD BOOST
= VOLTAGE REGULATOR
DC OUTPUT

= AC VOLTAGE

IM1

IM2

SP1

SP2

12

J1

1 2 3 4 5 6 7 8

10

9

11

13 14

PRINTED CIRCUIT BOARD

J2

CONTROL

ACTUATOR

GOVERNOR

SW1

START
PRIME

STOP

18

17

0

SCR

56

16

F1

0

13

16

56

FP

LOP

HTO

BLK

RED

18A

0

86

0

85

REGULATOR

VOLTAGE

2

2

0

6

22S

4

11S

6

0

4

22S

11S

LED

0

712

CH

CS

0

90

14

RED

BLACK

SM

SC

BATTERY

+

-

12V

SC

0

0

16

16

0

13

POWER WINDINGS

11

BA

33

DPE WINDING

6

2

4

0

44

CB2

CB1

FIELD

BLACK

RED

18

17

0

56

712

0

18

11S

22S

13

16

0

17

REMOTE

PANEL

CONNECTOR

14

712

D

E

G

F

C

B

18

17

H

A

0

GREEN

WHITE

0

13

712

14

0

GREEN

WHITE

0

NEUTRAL CONNECTION

AC CONNECTION

CUSTOMER

BY CUSTOMER

18

15

17

712

86

90

14

85

56

0

18A

4

15

11S

0

14

0

241

FS

14

712

22

44

44

22

22S 22

0

0

0

+

-

CIRCUIT CONDITION – SHUTDOWN:
Setting the START-STOP SWITCH (SW1) or the REMOTE PANEL
START-STOP SWITCH to its “STOP” position connects the Wire
18 circuit to frame ground. Printed Circuit Board action then closes
the circuit to Wire 18A, grounding the ignition magneto. PCB action
de-energizes DC output to j1 plug to the FUEL PUMP (FP), FUEL
SOLENOID (FS) and CHOkE HEATER (CH) are de-energized by the
loss of DC to Wire 14. Ignition and fuel flow are terminated, and the
engine shuts down.

CIRCUIT CONDITION – FAULT SHUTDOWN:
The engine mounts a HIGH OIL TEMPERATURE SWITCH (HTO)
and a LOW OIL PRESSURE SWITCH (LOP).

Should engine oil temperature exceed a preset value, the switch con-
tacts will close. Wire 85 from the Printed Circuit Board will connect to
frame ground. PCB action will then initiate a shutdown and will cause
the red led light on SW1 to flash 6 times then repeat.
Should engine oil pressure drop below a safe pre-set value, the LOP
switch contacts will close. On contact closure, Wire 86 will be connect-
ed to frame ground and PCB action will initiate an engine shutdown
and will cause the red led light on SW1 to flash 5 times then repeat.
The PCB has a built-in time delay for the Wire 85 fault shutdown. At
STARTUP ONLY the circuit board will wait approximately 6 seconds
before looking at the Wire 85 fault shutdowns. Once running, after
the 6 second time delay, grounding Wire 85 through either switch will
cause an immediate shutdown.