Kohler 8.5RES Service page 58

Code Fault
AF Auxiliary fault
HE High engine
temperature
LOP Low oil
pressure
Overcrank
OC
Locked rotor
OF Overfrequency Shutdown occurs when the governed frequency
OS Overspeed
OU * Overvoltage
UF Underfrequency Shutdown occurs when the governed frequency falls
UU Undervoltage
SCF0 Software
Communication
Fault 0
Engine S/M = Engine Service Manual; O/M = Generator Set Operation Manual
* ADC-RES only
Figure 5-7 Fault Codes, Shutdowns
58 Section 5 ADC-RES and DC-RET Controller
Downloaded from www.Manualslib.com
Description
Indicates a shutdown initiated by the emergency stop
switch or a tripped circuit breaker.
(TRES models only)
Shutdown occurs if the engine coolant temperature
exceeds the maximum temperature for more than
5 seconds. This protective becomes active after the
engine reaches the crank disconnect speed.
Shutdown occurs if a low oil pressure condition
exists for more than 5 seconds. This protective
becomes active 30 seconds 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.
Shutdown occurs after 3 unsuccessful starting
attempts. The crank cycle is set for three starting
attempts of 15 seconds cranking and 15 seconds
rest.
The generator set shuts down on an overcrank fault
if no engine rotation is sensed. Shuts down 3
seconds after the fault is detected.
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).
Shutdown occurs if the engine speed exceeds 110%
of the normal running speed for more than
0.3 seconds.
Shutdown occurs if the voltage exceeds 120% of the
system nominal voltage for more than 2 seconds.
below 54 Hz for more than 5 seconds. This
protective becomes active 10 seconds after engine
start. (10 second inhibit).
Shutdown occurs if the voltage falls below 80% of
the nominal system voltage for more than 10
seconds.
Indicates a software or communication problem
within the ADC-RES.
manuals search engine
Check
Check the position of the
emergency stop button.
(TRES models only)
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 low oil pressure switch
connections and operation.
Check the oil pump and
lubrication system.
Check the fuel supply valves and
pressure.
Check spark plug and battery.
See Troubleshooting Chart,
generator set cranks but does not
start.
Check mag pickup connections
and operation.
Check for a locked rotor.
Check system frequency setting
(parameter UU) on controller.
Measure output frequency and
adjust, if necessary.
Check governor system condition
and operation.
Check governor settings and
operation.
Check AC voltage.
Check wiring and connections.
Reduce the load and restart the
generator set.
Reduce the load and restart the
generator set.
Check wiring and connections.
Check controller configuration,
system voltage and frequency
(parameter UU).
Check AC voltage and adjust, if
necessary.
Check the SCR module. Replace
if necessary and test voltage
again.
Separately excite unit.
Check stator continuity.
Replace the controller.
Refer to
Section
O/M
1.7
—
2.2
6.11
Engine
S/M
6.12
O/M
3.3
6.9.4
—
4.5
6.9.5
6.9
6.9.5
6.9
6.7
8W/D
—
—
8W/D
4.5
6.7
6.8
6.2
6.3
4.9
TP-6196 10/09