Quietpact 40G Diagnostic Repair Manual Model 4700 - Generac Parts
Quietpact 40G Diagnostic Repair Manual Model 4700 - Generac Parts
Quietpact 40G Diagnostic Repair Manual Model 4700 - Generac Parts
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Section 5<br />
ENGINE DC CONTROL SYSTEM<br />
Introduction<br />
F1<br />
13<br />
RED<br />
RED<br />
SC<br />
BATTERY<br />
16<br />
BLk<br />
SM<br />
The engine DC control system includes all<br />
components necessary for the operation of<br />
the engine. Operation includes rest, priming,<br />
cranking, starting, running and shutdown.<br />
The system is shown schematically on<br />
Pages16-21.<br />
15<br />
15<br />
SW2<br />
44<br />
GREEN<br />
T2<br />
22P<br />
14<br />
WHITE<br />
0N<br />
0N<br />
0N<br />
0k<br />
0F<br />
NEUTRAL CONNECTION<br />
BY CUSTOMER<br />
j3<br />
j2<br />
14<br />
15<br />
PCB<br />
BATTERY CHARGE WINDING<br />
22S<br />
2A<br />
CB3<br />
2<br />
14A<br />
14<br />
77<br />
R1<br />
j1-1<br />
j1-2<br />
j1-3<br />
j1-4<br />
j1-5<br />
j1-6<br />
j1-7<br />
j1-8<br />
j1-9<br />
j1-10<br />
j1-11<br />
j1-12<br />
j1-13<br />
j1-14<br />
j1-15<br />
BCR<br />
55<br />
66<br />
POWER WINDING<br />
ELECTRONIC<br />
VOLTAGE<br />
REGULATOR<br />
DPE WINDING<br />
FIELD<br />
16<br />
120V 30A<br />
56<br />
90<br />
18A<br />
17<br />
17<br />
4<br />
66<br />
85<br />
0<br />
18<br />
18<br />
11S<br />
6<br />
FP<br />
4<br />
14<br />
SC<br />
SW1<br />
66<br />
66<br />
4<br />
CH<br />
(START)<br />
(STOP)<br />
11P<br />
17<br />
CB1<br />
4 T1<br />
FS 0<br />
IM<br />
33 HM<br />
BLACk<br />
0<br />
CS<br />
0I<br />
17<br />
14<br />
18<br />
15<br />
14A<br />
4<br />
4<br />
85<br />
85<br />
0<br />
SP<br />
0B<br />
HTO<br />
0<br />
LOP<br />
0<br />
REMOTE<br />
PANEL<br />
CONNECTOR<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
STOP<br />
START<br />
BLUE<br />
L1<br />
ORANG<br />
BROWN<br />
RED<br />
BROWN<br />
WHITE<br />
14A 15 18 14 17 0<br />
FUEL<br />
PRIME<br />
REMOTE PANEL<br />
(OPTIONAL)<br />
LEGEND<br />
Operational Analysis<br />
CIRCUIT CONDITION- Rest:<br />
Battery voltage is available to the engine<br />
controller circuit board (PCB) from the unit<br />
BATTERY and via (a) the RED battery cable,<br />
Wire 13, a 7.5 amp FUSE (F1), Wire 15 and<br />
circuit board Terminal J3. However, circuit<br />
board action is holding the circuit open and<br />
no action can occur.<br />
Battery output is available to the contacts of<br />
a STARTER CONTACTOR (SC), but the contacts<br />
are open.<br />
Battery voltage is also delivered to the FUEL<br />
PRIMER SWITCH (SW2). The switch is open<br />
and the circuit is incomplete.<br />
= 12VDC SUPPLY<br />
= 12VDC CONTROL<br />
= GROUND<br />
BCR - BATTERY CHARGE RECTIFIER<br />
CB1 - CIRCUIT BREAkER, 30A<br />
CB3 - CIRCUIT BREAkER, 2.5A<br />
CH - CHOkE HEATER<br />
CS - CHOkE SOLENOID<br />
F1 - FUSE, 7.5A<br />
FP - FUEL PUMP-OR-LPG SHUT OFF VALVE<br />
FS - FUEL SOLENOID<br />
GT - TERMINAL, GROUND 4-TAB<br />
HM - METER, HOUR (OPTIONAL)<br />
HTO - SWITCH, HIGH TEMP. OIL (CLOSES ON HIGH TEMP.)<br />
IM - IGNITION MAGNETO<br />
L1 - LIGHT, RUN (OPTIONAL)<br />
LOP - SWITCH, LOW OIL PRESSURE (CLOSES ON LOW PRESSURE)<br />
PCB - ENGINE CONTROLLER<br />
R1 - RESISTOR, 1 OHM 25W<br />
SC - STARTER CONTACTOR<br />
SM - STARTER MOTOR<br />
SW1 - SWITCH, START/STOP<br />
SW2 - SWITCH FUEL PRIMER<br />
SP - SPARk PLUG<br />
TC - TERMINAL, CONN. 4-TAB<br />
= 3-5 VDC FIELD BOOST<br />
/ VOLTAGE REGULATOR<br />
DC OUTPUT<br />
= AC POWER<br />
Page 16
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