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 />
15<br />
F1<br />
13<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 />
RED<br />
RED<br />
j3<br />
j2<br />
14<br />
15<br />
BATTERY CHARGE WINDING<br />
22S<br />
2A<br />
CB3<br />
SC<br />
PCB<br />
2<br />
14A<br />
14<br />
77<br />
R1<br />
BATTERY<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 />
16<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 />
0<br />
18<br />
18<br />
11S<br />
6<br />
BLk<br />
SM<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 />
14A<br />
L1<br />
CIRCUIT CONDITION- CRANKING:<br />
When the START-STOP SWITCH (SW1) is held<br />
at “START” position, Wire 17 from the engine controller<br />
circuit board is connected to frame ground.<br />
Circuit board action will then deliver battery voltage<br />
to (a) a STARTER CONTACTOR (SC) via<br />
Wire 56, and to an automatic CHOKE SOLENOID<br />
(CS) via Wire 90.<br />
When battery voltage energizes the STARTER<br />
CONTACTOR (SC), its contacts close and battery<br />
output is delivered to the STARTER<br />
MOTOR (SM) via Wire 16. The STARTER<br />
MOTOR (SM) energizes and the engine cranks.<br />
When the STARTER CONTACTOR (SC) closes,<br />
battery voltage is delivered to the engine controller<br />
board for field boost.<br />
While cranking, the CHOKE SOLENOID (CS) is<br />
energized cyclically by circuit board action (two<br />
seconds on, two seconds off).<br />
Also while cranking, circuit board action delivers<br />
battery voltage to the Wire 14/14A circuit. This<br />
energizes the FUEL PUMP (FP) ,FUEL<br />
SOLENOID (FS) and CHOKE HEATER (CH).<br />
Circuit board action holds open Wire 18A to<br />
common ground. The Magneto will induce a<br />
spark during cranking.<br />
BROWN<br />
RED<br />
18 14<br />
FUEL<br />
PRIME<br />
BROWN<br />
WHITE<br />
0<br />
REMOTE PANEL<br />
(OPTIONAL)<br />
LEGEND<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 18
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