Kohler 12RESM1 Service Manual

TP-6196 10/09 39Section 4 ADC 2100 and DC 2200 Controllers
Code Fault Description Check
Refer to
Section
AF Auxiliary fault Not used on these models. — —
HE High engine
temperature
Shutdown occurs if the engine coolant
temperature exceeds the maximum
temperature for more than 5 seconds.
This protective becomes active after the
engine reaches crank disconnect speed.
Check for blocked air inlets and exhaust outlets. 1.7
LCL Low coolant
level
Not used on air-cooled models. — —
LOC Loss of coolant Not used on air-cooled models. — —
LOP Low oil
pressure
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.
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.
2.2
2.2
6.11.2
6.11
Engine
S/M
OC Overcrank
Shutdown occurs after 3 unsuccessful
starting attempts. The crank cycle is set
for three starting attempts of 15 seconds
cranking and 15 seconds rest.
Check the fuel supply valves and pressure.
Check spark plug and battery.
See Troubleshooting Chart, generator set cranks
but does not start.
6.12
2.3
3.3
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.
Check mag pickup connections and operation.
Check for a locked rotor.
6.9.4
6.4
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).
Check system frequency setting (parameter UU)
on controller.
Measure output frequency and adjust, if
necessary.
Check governor system condition and operation.
4.5
6.9.5
6.9
OS Overspeed Shutdown occurs if the engine speed
exceeds 115% of the normal running
speed for more t han 0.3 seconds.
Check governor settings and operation. 6.9
OU * Overvoltage Shutdown occurs if the voltage exceeds
120% of the system nominal voltage for
more than 2 seconds.
Check AC voltage.
Check wiring and connections.
6.7
8
UF Underfrequency Shutdown occurs when the governed
frequency falls blow 90% of the nominal
system frequency for more than
5 seconds. This protective becomes
active 10 seconds after engine start
(10 second 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 seconds.
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.
Replace the SCR module and test voltage again.
Separately excite unit.
Check stator continuity.
—
8
4.5
6.7
6.8
6.2
6.3
SCF0 Software
Communication
Fault 0
Indicates a software or communication
problem within the ADC 2100
Replace the controller. 4.9
* Not applicable on DC 2200 controllers with software versions below 1.26. DC 2200 software version number is displayed on controller
powerup.
Figure 4-6 Fault Shutdown Codes

Kohler 12RESM1 Specifications

General

Brand	Kohler
Model	12RESM1
Category	Portable Generator
Language	English