Kohler 125EOZ/100EFOZ, Service Manual, Page: 61 / 148

TP-5737 5/01 47 Section 6 Decision-Maker
t
1 Controller Troubleshooting
9
F---
9
12
ADV-5353-6
+ --
K10
M
Starter
10 amp
K2
HET
LOP
HR
OP
WT
BV
70
K1
Fault
K4
Stator
BV Battery Volts
ETS High Exhaust Temperature Switch
FS Fuel System
GS Governor System
HET High Engine Temperature Switch
HR Hourmeter
K1 Fault Shutdown Relay
K2 Engine Run Relay
K3 Crank Disconnect/
Flashing Control Relay
K4 Crank Disconnect Relay
K5 Fault Latch Relay
K10 Auxiliary Run Relay
K20 Starter Relay Solenoid
LOP Low Oil Pressure Switch
LWL Low Water Level Sender
M Starter Motor
OP Oil Pressure Gauge
WT Water Temperature Gauge
D5 Run
Auto
Off/Reset
Remote Start
4
3
K4
K3
GS
K1
Fault
Shutdown Overspeed
K3
Crank
Disconnect
Q
2
Q
3
Speed
Sensor
Speed
Pickup
Speed Sensor
Actuator
K2
47
N
FS
Fault Latch Line
D
Overcrank, Overspeed, LWL, HET, and
LOP drive the fault shutdown circuit.
D
Fault latch provided by K1 normally open
contacts.
D
Overcrank shutdown is only driven by
AC.
D
Crank disconnect driven by AC and
speed sensor input.
D
Relays K1, K2, K3, K4, and K5 are part of
the controller circuit board and their
electrical connections and circuits are
simplified in this diagram.
D
Fault latch line, fault shutdown, crank
disconnect, overcrank, overspeed, and
speed sensor (dotted lines) are part of the
controller circuit board and their electrical
connections and circuits are simplified in
this diagram.
NOTE
Overcrank
K20
4
1
6 3
7
11
8
2
5
11
2
4
10
Voltage
Regulator
AC
AC
F+
V0
V7
V7
V8
Exciter
Field
Exciter
Armature
Main Rotor
Field
F2 F1
FP FN
10
15 amp
K5
K5
5 Second
Shutdown
Reset
K20
K1
K10
K3
6
G
AC
AC
F3
G
Photo Transistor
Circuit Board
LED Circuit Board
Photo-Coupling
SCR Assembly
16
ETS
Figure 6-4 Relay Controller Sequence of Operation with F-254717 and Later Circuit Boards