Kohler 15/30RYG

TP-6198 3/15 35Section 4 Controller
Code Fault Description Check
Reference
AF Auxiliary fault Input from a user-supplied switch that closes
when the fault is active. The generator set shuts
down 0.3 sec. after the fault is detected and will
not start when the fault is active (input is
grounded). This protection becomes active
3 sec. after crank disconnect.
Check the condition and operation of the
customer-supplied equipment connected to
the auxiliary fault input P21-6.
—
HE High engine
temperature
Shutdown occurs if the engine coolant
temperature exceeds the maximum temperature
for more than 5 sec. This protective becomes
active after engine reaches the crank disconnect
speed.
Check for blocked air inlets and exhaust
outlets.
Section 1.6
LCL Low coolant level Not used. — —
LOC Loss of coolant Not used. — —
LOP Low oil pressure Shutdown occurs if a low oil pressure condition
exists for more than 5 sec. This protective
becomes active 30 sec. after the engine has
reached crank disconnect speed (30-sec.
inhibit).
Note: The low oil pressure shutdown does not
protect against low oil level. Check the oil level
at the engine.
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.
O/M
O/M
Section 5.10
Engine S/M
OC Overcrank
Shutdown occurs after 3 unsuccessful starting
attempts. The crank cycle is set for three
starting attempts of 15 sec. cranking and 15 sec.
rest.
Check the fuel supply valves and pressure.
Check spark plug and battery.
See Troubleshooting Chart, generator set
cranks but does not start.
I/M
O/M
Section 3.3
The generator set shuts down on an overcrank
fault if no engine rotation is sensed. Shuts down
after 3 sec. of cranking or 1 sec. after the fault is
detected.
Check for a locked rotor. Section 5.4
OF Overfrequency Shutdown occurs when the governed frequency
exceeds 110% of the system’s frequency
setpoint for more than 5 sec. This protective
becomes active 10 sec. after engine start
(10-sec. inhibit).
Check system frequency setting (parameter
UU) on controller.
Section 4.9
Check engine governing system, controlled
by the engine ECM.
Engine S/M
OS Overspeed Shutdown occurs if the engine speed exceeds
115% of the normal running speed for more than
0.3 sec.
Check engine governing system, controlled
by the engine ECM.
Engine S/M
OU Overvoltage Shutdown occurs if the voltage exceeds 120%
of the system nominal voltage for more than
2sec.
Check AC voltage.
Check wiring and connections.
Section 5.7
W/D
UF Underfrequency Shutdown occurs when the governed frequency
falls blow 90% of the nominal system frequency
for more than 5 sec. or below 59 Hz for more
than 60 sec. This protective becomes active
10 sec. after engine start. (10-sec. inhibit).
Reduce the load and restart the generator
set.
—
UU Undervoltage Shutdown occurs if the voltage falls below 80%
of the nominal system voltage for more than
10 sec.
Reduce the load and restart the generator
set.
—
Check wiring and connections. W/D
Check controller configuration, system
voltage and frequency (parameter UU).
Section 4.9
Check AC voltage and adjust, if necessary. Section 5.7
Replace the SCR module and test voltage
again.
Section 4.7
Separately excite unit. Section 5.2
Check stator continuity. Section 5.3
SCF0 Software
Communication
Fault 0
Indicates a software or communication problem
within the ADC 2100.
Replace the controller. Section 4.8
Note: O/M = Generator Set Operation Manual; I/M = Generator Set Installation Manual; W/D = Wiring Diagram Manual
Figure 4-6 Fault Shutdown Codes