Owner`s manual

85
Bulletins, Etc.
5
Kohler Engines - GCU (24 584 40-S or 24 584 56-S) Blink Codes
LED Diagnostics
Failure Condition Possible Causes Response Response Time Yellow
LED
Green
LED
Overspeed
(Over 4500 RPM for
0.5 seconds
sustained)
External Noise on ignition input Ground to kill, close
carb throttle plate
0.2 seconds Flashing On
Frozen carb throttle plate
DLA failure
Mechanical bindage
Out of RPM range
(Unable to maintain an
average RPM of +/-
100 RPM of setpoint
for 10 seconds)
Frozen carb throttle plate Normal operation 10 seconds N/C Flashing
DLA failure
Mechanical bindage
Bad fuel
Bad ignition system
Missing ignition pulse
detected
RFI interference Normal operation N/A Pulse Off N/C
Poor lead connection
Bad ignition module
Ignition module signal
missing on startup
Ignition leads disconnected DLA will remain at
start point
N/A Off On
Watchdog Interrupt RFI interference Ground to kill, close
carb throttle plate
N/A Flashing Flashing
Overtemp
Software bug
Lightning
Excessive Battery
Voltage
(> 18v for .5 seconds)
Ground to kill, close
carb throttle plate
0.5 seconds Flashing Off
Good condition Engine is operating normally Normal operation 10 seconds of
good engine run
time
On Solid on
or solid
off
Figure 14. GCU Blink Code Chart.
Figure 15. 6 Pin Connector.
Figure 16. Red Wire with Yellow Tracer.
Red Wire
w/Yellow
Tracer
Red Wire
w/Yellow
Tracer