Kohler 14RES

TP-6735 7/17 47Section 4 Controller
Code Fault WorSD* Condition Check See Section
AC Loss of AC
sensing
W(1s)
SD (3 s)
[
Generator output AC sensing is
lost. Starts 10 seconds after
crank disconnect.
Warning: after 1 second if no
output detected after crank
disconnect.
Fault: after 3 seconds if voltage
was present and then lost.
Check for loose connections.
Check all AC leads connected to
the controller for continuity.
Wiring
Diagrams
Alternator excitation failure:
Inspect the brushes and check the
FN and FP connections.
5.6
Voltage Regulator failure: check
for voltage on the output leads.
Section 7,
Wiring
Diagrams
AF Auxiliary fault
input
SD [ An optional customer-
connected input is closed.
Check customer-supplied
equipment.
—
ATS ATS
communication
error
SD [ RRT: Shutdown if ATS interface
connection is lost.
Check connection to Model RRT
transfer switch interface board.
Section 4.9.6
Section 7,
Wiring
Diagrams
Section 4.8.3.
W Warning is displayed if RRT
interface board is connected
after controller is powered up.
Disconnect and then reconnect
battery power to the controller.
ESch Exercise not
scheduled
W May appear under some
conditions if the generator set
exercise has been cleared or
has not been set.
Press OFF to clear the warning.
Set the exerciser at the RDC
controller or at the transfer switch,
if the Model RRT transfer switch is
not used.
NOTE: Exercise the generator
set weekly.
Section 4.6
Hb High battery
voltage
W Engine starting battery voltage
rises above 125% of the battery
voltage setting for more than 10
seconds when the engine is
running. Not operative during
the engine crank cycle.
Clears when the battery voltage
returns to an acceptable level.
Check the battery rating and
condition.
Battery mfr’s
instructions
Check the battery charger
operation.
O/M
HE High engine
temperature
WorSD[ Engine coolant temperature
exceeds the maximum
temperature for more than
5 seconds. Function becomes
active after crank disconnect.
Warning at 300_ F.
Shutdown at 325_ F.
Check for blocked air inlets and
exhaust outlets.
1.7
Lb Low battery
voltage
W Engine starting battery voltage
falls below the battery voltage
setting (typically 12 volts) for
more than 90 seconds when the
engine is not running. Not
operative during the engine
crank cycle.
Clears when the battery voltage
returns to an acceptable level.
Check the battery rating and
condition.
Check the battery charger
operation.
Charge or replace the battery.
Battery mfr’s
instructions
O/M
LCb Low cranking
voltage
W Battery voltage falls below 60%
of system battery voltage for
more than 6 seconds while the
starter is engaged.
Charge or replace the battery.
—
* W = Warning; SD = Shutdown
[ Engine cooldown runs before shutting down.
Engine S/M = Engine Service Manual
I/M = Generator Set Installation Manual
O/M = Generator Set Operation Manual