Kohler 12RESL Manual - Page 15

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2.4 Faults

The DC 2200 controller displays the fault warning and

shutdown codes shown in Figure 2-3.

2.4.1

Shutdowns

If a shutdown code is displayed, the generator set has

shut down automatically under the fault conditions listed

in Figure 2-3. The generator set cannot be restarted

until the fault condition is corrected and the controller is

reset. See Section 2.4.3 to reset the controller after a

fault shutdown. The controller resets automatically after

a battery voltage fault condition is corrected.

Code

Fault

High engine

temperature

shutdown

Low battery

voltage warning

LOP

Low oil pressure

shutdown

Overcrank

shutdown

Overspeed

shutdown

OU *

Overvoltage

shutdown

Underfrequency

shutdown

UU *

Undervoltage

shutdown

SCF0

Software

Communication

Fault 0

* Controller software version 1.26 or higher. Software version number is displayed on controller powerup.

Figure 2-3 DC 2200 Fault Codes

TP-6398 4/07

Description

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.

Fault code is displayed if the 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.

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 also shuts down if no engine rotation is

sensed during cranking. Shuts down 1 second after the fault is

detected. *

Shutdown occurs if the engine speed exceeds 115% 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.

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).

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

2100

The shutdown switches on the generator set

automatically reset when the problem is corrected. The

high engine temperature switch automatically resets

when the generator set cools. However, the fault does

not clear until the controller is reset.

2.4.2

Warning

The controller displays warning code LB but the

generator set does not shut down when the engine

starting battery voltage is low as described in

Figure 2-3.

Check

Check for blocked air inlets and exhaust

outlets.

Check the battery rating and condition.

Check the battery charger operation.

Charge or replace the battery.

Check for leaks in the lubrication system.

Check the oil level and add oil if the level

is low.

Check the fuel supply, spark plug, and

battery.

Check for loose connections.