Generac Power Systems 5410 User Manual
Section 5
ENGINE DC CONTROL SYSTEM
ENGINE DC CONTROL SYSTEM
Page 20
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
LOP - LOW OIL PRESSURE SWITCH
SCR - STARTER CONTACTOR RELAY
SM - STARTER MOTOR
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
CS - CHOKE SOLENOID
IMS - IGNITION MODULE STUD
IM2 - IGNITION MODULE, CYL. 2
HTO - HIGH OIL TEMPERATURE SWITCH
IM1 - IGNITION MODULE, CYL. 1
IM1 - IGNITION MODULE, CYL. 1
GRD1 - CONTROL PANEL GROUND
GRD2 - UNIT GROUND STUD
GRD2 - UNIT GROUND STUD
BA - BRUSH ASSEMBLY
CB 1 / CB 2 - SEE CHART
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
= 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
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 – RUNNING:
With the FUEL PUMP (FP) and FUEL SOLENOID (FS) operating
and ignition occurring, the engine should start, and the START-
STOP SWITCH (SW1) is released. This voltage is delivered to the
PCB via Wire 18A to prevent STARTER MOTOR engagement above
a certain rpm.
With the FUEL PUMP (FP) and FUEL SOLENOID (FS) operating
and ignition occurring, the engine should start, and the START-
STOP SWITCH (SW1) is released. This voltage is delivered to the
PCB via Wire 18A to prevent STARTER MOTOR engagement above
a certain rpm.
Printed Circuit Board action terminates DC output to the STARTER
CONTACTOR RELAY (SCR), which then de-energizes to end crank-
ing. PCB action terminates DC output to the CHOkE SOLENOID
(CS).
The choke will go to a position determined by the CHOkE HEATER
(CH).
The LOW OIL PRESSURE SWITCH (LOP) is normally closed. After
startup, engine oil pressure will open the LOP.
CONTACTOR RELAY (SCR), which then de-energizes to end crank-
ing. PCB action terminates DC output to the CHOkE SOLENOID
(CS).
The choke will go to a position determined by the CHOkE HEATER
(CH).
The LOW OIL PRESSURE SWITCH (LOP) is normally closed. After
startup, engine oil pressure will open the LOP.