Generac Power Systems 17 kW LP Portable Generator User Manual


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CONTROLLER DISPLAY
Running - Utility Lost
CONTROLLER
= 12 VDC ALWAYS PRESENT
= AC VOLTAGE
= GROUND FOR CONTROL PURPOSES
= 12 VDC DURING CRANKING ONLY
= 12 VDC DURING ENGINE RUN CONDITION
= DC FIELD EXCITATION
= 5 VDC TO LED
0
4
4
0
BA
6
11
22
6
2
2
REGULATOR
11
2
6
0
4
22
VOLTAGE
4
0
0
13
13
18
SP2
IM2
16
13
SCR
0
0
86
85
HTO
LOP
18
0
13
12V
BATTERY
SCR
SM
IM1
SP1
44
11
POWER
WINDING
33
22
WINDING
POWER
STATOR
4
0
56
0
SC
820
817
818
819
819
818
817
820
L2
L1
LED BOARD
4
3
2
1
4
ACTUATOR
GOVERNOR
14
14
90
OUTPUT
GENERATOR
240 VAC
NEUTRAL
INPUT
UTILITY
240 VAC
TRANSFER
+ BATTERY
GROUND
56015B23
23
0
0
FS
BATTERY WARMER
OPTIONAL
N1
00
22
33
11
44
CB
15B
14
0
0
CS
N2
N1
21
N2
N1
18
13
86
85
4
3
2
1
18171615141312109 1186 743 5
CB - CIRCUIT BREAKER, MAIN OUTPUT
HTO - HIGH TEMPERATURE SWITCH
FS - FUEL SOLENOID
LEGEND
SCR - STARTER CONTROL RELAY
SC - STARTER CONTACTOR
CS - CHOKE SOLENOID
LOP - LOW OIL PRESSURE SWITCH
SM - STARTER MOTOR
BA - BRUSH ASSEMBLY
IM_ - IGNITION MODULE
SP_ - SPARK PLUG
0
J3
J1
PRINTED CIRCUIT BOARD
TO
PCB
7.5 AMP FUSE
SELF RESETTING FUSE
J2
Page 113
SECTION 4.2
OPERATIONAL ANALYSIS
Figure 5. Circuit Condition - Initial Transfer to Standby
• Whenthecircuitboard’s“enginewarm-uptimer”timesout,circuitboardactioncompletestheWire23circuitto
ground. The transfer relay then energizes and its normally open contacts close.
• Standbypowerisnowdeliveredtothestandbyclosingcoil(C2),viaWiresE1/E2,thenormallyopentransfer
relay contacts, Wire 205, limit switch XB1, Wire B, and a bridge rectifier. The standby closing coil energizes and
the main current carrying contacts of the transfer switch are actuated to their STANDBY source side.
• AsthemaincontactsmovetotheirSTANDBYsourceside,amechanicalinterlockactuateslimitswitchXB1to
its open position and limit switch XA1 to its “Utility” side position. When XB1 opens, standby closing coil C2 3
de-energizes.
• StandbypowerisdeliveredtotheLOADterminals(T1/T2)ofthetransferswitch.
DC CONTROL
PART 4
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