Kohler 40COZ/33CFOZ Service Manual page 49

Engine does not crank with the generator
set master switch in the RUN position.
Is the battery fully charged?
No
Charge the battery and attempt
restart. If the engine does not
crank, continue the troubleshooting
sequence.
Is the controller LED4 lit?
No
Is the emergency stop switch (controller
or remote) activated? See emergency
stopping in Section 2, Operation.
No Yes
Reset the emergency stop
switch (controller or remote). Is
LED4 lit?
No
Place the test jumper between TB1-1
and TB1-1A. Is LED4 lit? Remove
the test jumper before proceeding.
No
Check for DC voltage at the F2 fuse
(3 amp). See Figure 5-20. Voltage
at the fuse indicates the fuse is
good. Is voltage present?
No
Check the fuse.
Is the fuse okay?
No
Replace the fuse. If the fuse
blows again, refer to Section
5.3.2, Fuses.
Figure 5-18 Engine Does Not Crank
TP-5737 5/01
Yes
Replace the P3/P4
harness.
Do the controller's LED2 and LED3 light
Yes
with the generator set master switch in
the RUN position?
Was there a fault shutdown?
No
Replace the
circuit board.
Yes
Yes
Yes
Replace the circuit board.
Yes
Check the P1 connector/harness.
Check if the battery connections
are loose or reversed.
Press the lamp test
button. Do lamps light?
No
Check the P3/P4 harness and
connections. Are the connections okay?
No
Replace the inoperative
indicator panel circuit board.
No
Yes
Correct the
fault.
Repair the
inoperative
component.
Repair/replace the
inoperative emergency
stop switch (controller or
remote.)
Section 5 Decision-Makert 3+ Troubleshooting
Yes
Yes
Yes
Check the engine start circuit
(P1 harness, starter, solenoid,
battery connections, etc.). Is
the start circuit okay?
No Yes
Replace the
circuit board.
35