Kohler 12RESNT Operation - Page 20

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Code Fault

Description

High engine

Shutdown occurs if the engine coolant temperature exceeds the

temperature

maximum temperature for more than 5 seconds. This

shutdown

protective becomes active after the engine reaches the crank

disconnect speed.

Low oil

Shutdown occurs if a low oil pressure condition exists for more

pressure

than 5 seconds. This protective becomes active 30 seconds

shutdown

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.

Overcrank

Shutdown occurs after 3 unsuccessful starting attempts. The

shutdown

crank cycle is set for three starting attempts of 15 seconds

cranking and 15 seconds rest.

Locked rotor

The generator set also shuts down on OC if no engine rotation

is sensed during cranking. Shuts down 3 seconds after the fault

is detected.

Overfrequency

Shutdown occurs when the governed frequency exceeds 110%

shutdown

of the system's frequency setpoint for more than 5 seconds.

This protective becomes active 10 seconds after engine start

(10 second inhibit).

Overspeed

Shutdown occurs if the engine speed exceeds 110% of the

shutdown

normal running speed for more than 0.3 seconds.

Underfrequency

Shutdown occurs if the governed frequency falls below 54 Hz

shutdown

for more than 5 seconds.

Shutdown also occurs if the governed frequency falls below

56.5 Hz for more than 60 seconds.

This protective becomes active 10 seconds after engine start.

(10 second inhibit).

Undervoltage

Shutdown occurs if the voltage falls below 80% of the nominal

shutdown

system voltage for more than 10 seconds.

Low battery

Fault code is displayed if the engine starting battery voltage falls

voltage warning

below 11 VDC for more than 30 seconds when the engine is not

running. Not operative during the engine crank cycle, this fault

condition does not inhibit engine starting.

The fault condition clears when the battery voltage returns to an

acceptable level.

Figure 2-3 DC-RET Fault Codes

4. Start the generator set by moving the generator set

master switch to RUN. Test operate the generator

set to verify that the cause of the shutdown has

been corrected.

5. Move the generator set master switch to OFF/

RESET.

6. Reconnect the generator set to the load using the

line circuit breaker or ATS.

Section 2 Operation

Check

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 the fuel supply, spark plug,

and battery.

Check for loose connections.

Contact an authorized