Kohler 18RESNT Operation page 20

Code Fault Description
HE High engine Shutdown occurs if the engine coolant temperature exceeds the
temperature maximum temperature for more than 5 seconds. This
shutdown protective becomes active after the engine reaches the crank
disconnect speed.
LO Low oil Shutdown occurs if a low oil pressure condition exists for more
P pressure than 5 seconds. This protective becomes active 30 seconds
shutdown after the engine has reached crank disconnect speed
(30 second inhibit).
Note: The low oil pressure shutdown does not protect against
low oil level. Check the oil level at the engine.
Overcrank Shutdown occurs after 3 unsuccessful starting attempts. The
OC
shutdown crank cycle is set for three starting attempts of 15 seconds
cranking and 15 seconds rest.
Locked rotor The generator set also shuts down on OC if no engine rotation
is sensed during cranking. Shuts down 3 seconds after the fault
is detected.
OF Overfrequency Shutdown occurs when the governed frequency exceeds 110%
shutdown of the system's frequency setpoint for more than 5 seconds.
This protective becomes active 10 seconds after engine start
(10 second inhibit).
OS Overspeed Shutdown occurs if the engine speed exceeds 110% of the
shutdown normal running speed for more than 0.3 seconds.
UF Underfrequency Shutdown occurs if the governed frequency falls below 54 Hz
shutdown for more than 5 seconds.
Shutdown also occurs if the governed frequency falls below
56.5 Hz for more than 60 seconds.
This protective becomes active 10 seconds after engine start.
(10 second inhibit).
UU Undervoltage Shutdown occurs if the voltage falls below 80% of the nominal
shutdown system voltage for more than 10 seconds.
LB Low battery Fault code is displayed if the engine starting battery voltage falls
voltage warning below 11 VDC for more than 30 seconds when the engine is not
running. Not operative during the engine crank cycle, this fault
condition does not inhibit engine starting.
The fault condition clears when the battery voltage returns to an
acceptable level.
Figure 2-3 DC-RET Fault Codes
4. Start the generator set by moving the generator set
master switch to RUN. Test operate the generator
set to verify that the cause of the shutdown has
been corrected.
5. Move the generator set master switch to OFF/
RESET.
6. Reconnect the generator set to the load using the
line circuit breaker or ATS.
20 Section 2 Operation
Check
Check for blocked air inlets and
exhaust outlets.
Check for leaks in the lubrication
system.
Check the oil level and add oil if
the level is low.
Check the fuel supply, spark plug,
and battery.
Check for loose connections.
Contact an authorized
distributor/dealer for service if
problem continues.
Contact an authorized
distributor/dealer for service if
problem continues.
Contact an authorized
distributor/dealer for service if
problem continues.
Reduce the load and restart the
generator set.
Contact an authorized
distributor/dealer for service if
problem continues.
Reduce the load and restart the
generator set.
Contact an authorized
distributor/dealer for service if
problem continues.
Check the battery rating and
condition.
Check the battery charger
operation.
Charge or replace the battery.
7. Move the generator set master switch to the AUTO
position for startup by remote transfer switch or
remote start/stop switch.
Note: The controller's LED display remains off
until an engine start command is received.
TP-6517 4/09