Kohler 27EFOZ, Service Manual

Page: 36 / 80

TP-5936 7/04 24 Section 6 Controller Troubleshooting
Is the fuel solenoid
functioning?
Check the oil level.
Repair/replace the oil
pump
Use a mechanical gauge to
verify oil pressure. Does the
engine have proper oil
pressure?
Does the K5 relay LED
light after 5--10 seconds
of running time?
Yes
Does the engine continue
to run after the start
switch is released?
Yes
No
Does the K1
relay LED light?
Can the engine be stopped
by using the stop switch?
Yes
Generator set
checks out okay
No
Yes
Go to C
(next page)
Do the local and
remote start/ stop
switches
function?
Yes
Replace the
inoperative
start/stop
switch
Replace
the fuel
solenoid
No
No
Replace the
circuit board (K5
relay inoperative)
Does the low oil pressure
(LOP) safety shutdown
switch function?
No
Replace the LOP safety
shutdown switch
Yes
No
Did the K4 relay LED light?
Replace the
circuit board
(inoperative K4
relay)
No
Do the local and
remote start/stop
switches function?
Replace the circuit
board (inoperative
K1 or K2 relay)
Yes
Replace the inoperative
start/stop switch
No
Did the K4 relay LED light?
Yes
No
Yes
Is the K25 relay functioning?
No
No
Replace the
circuit board
(K4 relay
inoperative)
B
Replace
the K25
relay
No
Yes
Replace the circuit board
(inoperative K4 relay)
Do the temperature
safety shutdown
switches function?
Replace the inoperative
temperature switch(es)
No
Yes
Yes
Yes
Figure 6-5 Troubleshooting Relay Controller Circuit Board (3 of 4)