Generac Power Systems 7 kW NG Repair Manual page 107

ENGINE/DC CONTROL
POWER
WINDING
44
STATOR
22
POWER
WINDING
ROTOR
EXCITATION
BA
WINDING
0 4 2
6
C1
6 5
4 3
PIN #
0 4 2 6
6
4
0
0
4
GOVERNOR
ACTUATOR
FIELD BOOST
DIODE
56
56
56
85
A
HTO
SCR
86
B
0 0
LOP
0 0
13
BATTERY
12V
0
PART 4
33
11
11 44
OPTIONAL
BATTERY WARMER
240Vac
1
CONNECT
2 1
N1A
OPTIONAL
OIL WARMER
N1B 1
240Vac
11 44
CONNECT
N1
00
6
4
0
11
N1
44
N2
T1
N1 00 2 44
T1 N2
1 2 3 4 5 6 7 8 9
J5
PRINTED CIRCUIT BOARD
F1
J3
1 2 3 4 5 6 7 8 9
90 0 13 818 85 14
817 819 820 210
14
CS
14
FS
14
0
0
SP1
IM1
13 13
SP2
IM2
SCR
16
SC
SM
Figure 102. Transfer to the Standby
CB1
44
11
11
2
N2A
2 N2B
N2
T1A
MOV
0 6
11 4
10 11 12 13 14
Running - Utility Loss
CONTROLLER
J4
10 11 12 13 14 15 16 17 18 19 20 21 22 23
86 18 56 194
J1
209 23
1K24
56
820
817
818
819
0
18
18
= 12 VDC ALWAYS PRESENT
= AC VOLTAGE
= GROUND
= PCB GROUND CONTROL
= 12 VDC DURING CRANKING ONLY
= 12 VDC DURING ENGINE RUN CONDITION
= DC FIELD EXCITATION
= 5 VDC TO LED
Operational Analysis
CB2
33
22
NEUTRAL
00 00 WHT
N1
N2
T1
11C
00
0
LED BOARD
J1
820 1
2
817
818 3
819
4
209
210
0
194
23
LEGEND
BA - BRUSH ASSEMBLY
CB1 - CIRCUIT BREAKER, MAIN OUTPUT
CB2 - CIRCUIT BREAKER, GFCI
CS - CHOKE SOLENOID
FS - FUEL SOLENOID
F1 - 7.5 AMP FUSE
HTO - HIGH TEMPERATURE SWITCH
IM_ - IGNITION MODULE
LOP - LOW OIL PRESSURE SWITCH
MOV - VARISTOR
SC - STARTER CONTACTOR
SCR - STARTER CONTROL RELAY
SM - STARTER MOTOR
SP_ - SPARK PLUG
Section 4.3
240 VAC
GENERATOR
OUTPUT
240 VAC
UTILITY
INPUT
120 VAC
LOAD SUPPLY
BATTERY CHARGER
120 VAC
ACCESSORY
POWER
OUTPUT
L1
L3
L2
COMMON
ALARM
GROUND
+ BATTERY
TRANSFER
Page 105