Kohler 14RES Manual page 48

Code Fault
LOP Low oil
pressure
Lr Locked rotor
LrC Loss of voltage
regulator
communication
NoEC No Ec setting
OC Overcrank
OF Over frequency
OS Overspeed
OU Overvoltage
SS Speed sensor
failure
* W = Warning; SD = Shutdown
[ Engine cooldown runs before shutting down.
48 Section 4 Controller
W or SD* Condition
SD The LOP switch indicates low
[
oil pressure for more than
5 seconds. Function becomes
active 30 seconds after crank
disconnect (30 second inhibit).
Note: The low oil pressure
shutdown does not protect
against low oil level. Check the
engine oil level regularly as
recommended in the O/M.
SD No engine rotation is sensed
during cranking. Shuts down 3
seconds after the fault is
detected.
SD No communication between
[
controller and voltage regulator.
SD The engine configuration (Ec)
parameter is not set. The Uu
setting may also have been
reset.
SD Three unsuccessful starting
attempts.
SD
Governed frequency exceeds
[
110% of the system's frequency
setpoint for more than 5
seconds. Function becomes
active 10 seconds after engine
start (10 second inhibit).
SD Engine speed exceeds 115% of
[
the normal running speed for
more than 0.3 seconds.
SD Output voltage exceeds 120%
[
of the system nominal voltage
for more than 2 seconds.
SD Engine speed sensor has
failed.
Check
Check for leaks in the lubrication
system.
Check the oil level and add oil if
the level is low.
Check low oil pressure switch
connections and operation.
Check the oil pump and
lubrication system.
Check mag pickup connections
and operation.
Check for a locked rotor.
Disconnect and then reconnect
the battery to reset the controller.
Replace the controller if LrC
continues to appear.
Use the controller keypad (RDC
only) or a PC with SiteTech
software to set the controller's Ec
and Uu parameters.
Check the fuel supply valves and
pressure.
Check spark plug and battery.
See Troubleshooting Chart,
generator set cranks but does not
start.
Check system frequency setting
(parameter UU) on controller.
Measure output frequency and
adjust, if necessary.
Check governor system condition
and operation.
Check governor settings and
operation.
Check output voltage and adjust,
if necessary (parameter 1P,
voltage adjust).
Check controller settings for
system voltage (Parameter Uu).
Check the calibration (SiteTech
software required). Controller
firmware version 2.04 or higher is
required for calibration.
Check the mag pickup resistance,
air gap, and operation.
Engine S/M = Engine Service Manual
I/M = Generator Set Installation Manual
O/M = Generator Set Operation Manual
See Section
—
O/M
5.10
Engine S/M
5.9.4
5.4
4.13
4.8.4
4.10
I/M
5.11
I/M
3.5
4.10
5.9.5
5.9
5.9
5.8
I/M
4.11
5.9.4
TP-6735 7/17