Kohler 5ECD Service Manual page 27

OC Overcrank Shutdown occurs after 3 unsuccessful starting attempts.
The crank cycle is set for three starting attempts of
7 seconds cranking and 15 seconds rest.
The generator set shuts down on an overcrank fault if no
engine rotation is sensed. Shuts down after 3 seconds of
cranking or 1 second after the fault is detected.
OF Overfrequency Shutdown occurs when the governed frequency exceeds
110% 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 115% of
the normal running speed for more than 0.3 seconds.
OU Overvoltage Shutdown occurs if the voltage exceeds 120% of the
system nominal voltage for more than 2 seconds.
UF Underfrequency Shutdown occurs when the governed frequency falls
blow 90% of the nominal system frequency for more than
5 seconds or below 59 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 system voltage for more than 10 seconds.
SCF0 Software Indicates a software or communication problem within
Communication the ADC 2100.
Fault 0
Note: O/M = Generator set Operation Manual; I/M = Generator Set Installation Manual
* Available on units with serial number 2085259 and later.
Figure 4-5 Fault Shutdown Codes
TP-6391 9/08
0% y q y
d Thi i b
y g
Check the fuel supply.
Check spark plug and battery.
See Troubleshooting Chart, generator
set cranks but does not start.
Check for a locked rotor.
Check system frequency setting
p 5 (parameter UU) on controller.
i 10 d
Check engine governing system,
controlled by the engine ECM.
Check engine governing system,
controlled by the engine ECM.
Check AC voltage.
Check wiring and connections.
Reduce the load and restart the
generator set.
Reduce the load and restart the
0 generator set.
Check wiring and connections.
Check controller configuration, system
voltage and frequency (parameter UU).
Check AC voltage and adjust, if
necessary.
Replace the SCR module and test
voltage again.
Separately excite unit.
Check stator continuity.
Replace the controller.
I/M
O/M
3.3
5.4
4.11
Engine
S/M
Engine
S/M
5.7
7
—
—
7
4.11
5.7
4.9
5.2
5.3
4.10
Section 4 Controller 27