Kohler 12RES

2.3.4 Fault Shutdowns
The generator set shuts down automatically under the
fault conditions listed in Figure 2-3 and the controller
displays a fault code. The generator set cannot be
restarted until the fault condition is corrected and the
controller is reset. See Section 2.3.5 to reset the
controller after a fault shutdown. The controller resets
automatically after a battery voltage fault condition is
corrected.
The shutdown switches on the generator set
automatically reset when the problem iscorrected. The
high engine temperature switch automatically resets
when the generator set cools. However, the fault does
not clear until the controller is reset.
The controller displays a fault code but the generator set
does not shut down under the conditions shown in
Figure 2-4.
Code Fault
AF Auxiliary fault
input shutdown
Description
Input from a customer-supplied switch that closes when the
fault is active. The generator set shuts down and will not start
when the fault is active (input is grounded),
Check
Checkthe cause of theauxiliary fault.
HE High engine Shutdown occurs if the engine coolant temperature exceeds Check for blocked air inlets and exhaust
temperature the maximum temperature for more than 5 seconds, This outlets,
shutdown protective becomes active after the engine reaches the crank
disconnect speed,
LOP Low oil pressure Shutdown occurs if a low oil pressure condition exists 7 Check for leaks in the lubdcation system,
shutdown seconds after the engine has reached crank disconnect speed. Check the oil level and add oil if the level
Note: The low oil pressure shutdown does not protect against is low.
low oil level, Check the oil level at the engine,
OC Overcrank Shutdown occurs after 3 unsuccessful starting attempts. The Check the fuel supply, spark plug, and
shutdown crank cycle is set for three starting attempts of 15 seconds battery.
cranking and 15 seconds rest. Check for loose connections.
The generator set also shuts down after 1 crank attempt if no Contact an authorized distributor/dealer for
speed signal is sensed, Shuts down 1 second after the fault is service if problem continues.
detected.
OF Overfrequency Shutdown occurs when the governed frequency exceeds 110% Contact an authorized distributor/dealer for
shutdown of the system's frequency setpoint for more than 1 second, service if problem continues.
This protective becomes active 30 seconds after engine start.
OS Overspeed Shutdown occurs if the engine speed exceeds 115% of the Contact an authorized distributor/dealer for
shutdown normal running speed for more than 1 second, service if problem continues.
OU Overvoltage Shutdown occurs if the voltage exceeds 120% of the voltage Contact an authodzed distributor/dealer for
shutdown regulator setpoint for more than 1 second, service if problem continues.
UF Underfrequency Shutdown occurs when the governed frequency falls 1 Hz Reduce the load and restart the generator
shutdown below the system's frequency setpoint for more than 1 second, set,
Contact an authodzed distributor/dealer for
service if problem continues.
UU Undervoltage Shutdown occurs if the voltage falls below 80% of the voltage Reduce the load and restart the generator
shutdown regulator setpoint for more than 1 second. This protective set,
becomes active 30 seconds after engine start. Contact an authorized distributor/dealer for
service if problem continues.
Figure 2-3 ADC Fault Shutdown Codes
Code Fault Check
HB High battery Check the battery rating and condition.
voltage warning
LB Low battery
voltage warning
Description
Fault code is displayed ifthe engine starting battery voltage rises
above 16 VDC for a 12 VDC system or above 30 VDC for a
24 VDC system for more than 10 seconds when the engine is not
running, This fault condition does not inhibit engine starting.
The fault condition clears when the battery voltage returns to a
voltage within the limits for more than 10 seconds.
Fault code is displayed ifthe engine starting battery voltage falls
below 8 VDC for a 12 VDC system or below 16 VDC for a 24 VDC
system for more than 10 seconds when the engine is not running.
This fault condition does not inhibit engine starting.
The fault condition clears when the battery voltage returns to a
voltage within the limits for more than 10 seconds.
Check the battery charger operation.
Check the battery rating and condition.
Check the battery charger operation.
Charge or replace the battery.
Figure 2-4 ADC Fault Warning Codes
TP-6195 1/04 Section 2 Operation 5