Kohler 6.5-27EFOZD, Service

Page: 41 / 104

TP-6255 7/06 41 Section 6 Troubleshooting
Troubleshooting Chart, continued
Problem Possible Cause Corrective Action Reference
Generator set
k b
No fuel Check the fuel supply. —
cranks but
does not start
Loose connection or open circuit Check for loose or open
connections at the fuel solenoid
(lead 70A). Check the
controller/engine wiring continuity. Section 10
Air cleaner clogged Clean or replace. Section 3
Incorrect controller configuration Check for correct controller
configuration parameters: unit
configuration (UC) and engine
configuration (EC). Section 7.5
No engine rotation sensed (check
for an overcrank fault shutdown) Check for a locked rotor. Section 8.6
Generator set
starts hard Low battery voltage Check battery voltage, power
supply, and operation. Generator Set O/M
Air cleaner clogged Replace element. Section 3
Worn piston rings, valves Check compression. Engine S/M
Generator set
starts but
shuts down Fault shutdown Check for a fault shutdown code
on the Advance Digital Control’s
LED display. Correct the fault and
then move the generator set
master switch to the OFF/RESET
position to reset the ADC. Section 7.4
Generator set
stops
suddenly Fault shutdown Check for a fault shutdown code
on the Advanced Digital Control’s
LED display. Correct the fault and
then move the generator set
master switch to the OFF/RESET
position to reset the ADC. Section 7.4
No fuel Check the fuel supply. —
Fuel line restriction Inspect fuel lines. —
Air cleaner clogged Replace element. Section 3
Blown controller fuse (F3) Replace fuse. Section 8.12
Blown auxiliary winding fuse (F1) Replace fuse. If fuse blows again,
test generator components. Section 8.12
Blown relay interface board (RIB)
fuse (F2) Replace fuse. Section 8.12
Engine overheated (hot engine
only) Check air intake, oil level, air
inlet/outlet. Sections 2 and 3
Low oil pressure (LOP) shutdown Attempt startup. If the unit shuts
down, remove the lead from the
LOP switch and reset the
controller. A successful restart
attempt indicates a faulty LOP
shutdown switch.
Note: Check the engine oil
pressure before performing the
test and/or replacing the LOP
shutdown switch.
Section 8.11
Engine overloaded Reduce electrical load. Generator Set I/M
Loss of generator output voltage
to controller Check connections at P15 plug.
Check continuity of AC sensing
leads 11 and 44 (for 1-phase
models) or leads 7, 8, and 9 (for
3-phase models).
Section 10
Faulty K3 (flash) relay Check for Flash LED illumination.
Check RIB fuse. Replace relay
board. Section 7.10