Kohler 7.5EOR Service page 36

Does the engine continue
C
to run after the start
switch is released?
No
Does the K1
No
relay LED light?
Yes
Go to
D
Does the K5 relay LED
light after 5--10 seconds
of running time?
Did the K4 relay LED light?
Yes
Replace the circuit board
(inoperative K1 or K2 relay).
Is the low oil pressure (LOP)
safety shutdown switch
functional?
Yes
Does the engine have proper oil
pressure? Use a mechanical
gauge to verify pressure.
No
Figure 6-5 Troubleshooting the Relay Controller Circuit Board (3 of 4)
36 Section 6 Controller Troubleshooting
Yes
No
Replace the circuit
Yes
board (inoperative
K5 relay).
No
Are the local and
remote start/stop
Yes
switches functional?
Replace the LOP safety
No
Yes
Check the oil level.
Repair/ replace the oil
pump.
Can the engine be stopped
by using the stop switch?
No
Did the K4 relay LED light?
No
Are the local and
remote start/stop
switches functional?
Replace the
inoperative
Yes
Replace the
circuit board
(inoperative
K4 relay ).
No
Replace the
inoperative
start/stop switch.
shutdown switch.
Are the temperature
safety shutdown
switches functional?
Replace the inoperative
No
temperature switch(es).
Yes
The generator set
is functional.
Yes
Is the fuel solenoid
functional?
No
Replace the
fuel solenoid.
Yes
start/stop
switch.
Is the K25 relay functional?
Yes
Replace the circuit
board (inoperative K4
relay).
Replace the
circuit board
Yes
(inoperative K4
No
No
Replace
the K25
relay.
relay).
TP-6073 4/06