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Condition (Fault)
Loss of pickup while running
Engine overspeed
Break of fuel shut-off solenoid lead
Loss of DC power to governor assembly
Break of stepper motor leads
Actuator linkage failure
Figure 12. Electronic Governor Fault Shutdown Conditions and Results
GOVERNOR
ACTUATOR
WHT.
YEL.
BLK.
RED
GRN.
BLU.
MAGNETIC
PICKUP
MP
GOVERNOR
MP
SB-555 5/96
Throttle moves to closed position and fuel shut-off solenoid de-energizes
(genset shutdown)
Fuel shut-off solenoid de-energizes (genset shutdown)
Fuel shut-off solenoid de-energizes
Fuel shut-off solenoid de-energizes (genset shutdown)
Erratic performance then fuel shut-off solenoid de-energizes (genset shutdown)
Erratic performance then fuel shut-off solenoid de-energizes (genset shutdown)
2
1
1
2
4
3
3
4
6
5
5
6
P9
J9
1
1
2
2
3
3
4
4
5
5
6
6
CARB.
AD
Figure 13. Electronic Governor Schematic (Typical)
Schematic
BLACK
YEL
MP
GREEN
P6--5
Figure 14. Schematic Symbols (Typical)
1
2
3
4
4
3
2
5
6
7
8
8
7
6
9
10
11
12
12
11
10
13
14
15
16
16
15
14
17
18
19
20
20
19
18
P4
J4
M2
16
16
M4
17
17
M3
9
9
M1
10
10
MP
11
11
MP
13
13
AD
1
1
70
ELECTRONIC
GOVERNOR BOARD
STM
OVER
GAIN
SPEED
P6--6
Result
1
5
3
2
1
9
6
5
4
13
9
8
7
17
12
11
10
P7
J7
M2
1
1
M4
2
2
M3
3
3
M1
4
4
N
10
10
MP
11
11
MP
7
7
AD
9
9
6
6
70
B+
Line
YELLOW
WHITE
BLACK
GREEN
RED
SPEED
BLUE
MAGNETIC
PICKUP
SENSOR
TP-5572-6
STEPPER
MOTOR
TP-5572-6
7
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