Kohler 12RESNT Operation - Page 18

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2.2.2

LED Display

The LED display indicates generator set status as

shown in Figure 2-2. When the generator set is running,

engine runtime hours are shown unless a fault is active.

The LED display is activated by a start or RUN

command as follows:

Move the master switch to RUN.

With the master switch in AUTO, send a remote start

command (close the remote start contact across

leads 3 and 4).

When the generator set is started, the version number of

the controller application code is displayed during the

first 2 seconds of the crank cycle.

When the master switch is in AUTO, the display may

turn off 48 hours after generator set shutdown. See

Section 2.3.2.

2.3 Controller Power

The DC-RET is powered by the generator set engine

starting battery.

Note: The generator sets are equipped with factory-

installed battery chargers to prevent battery

discharge.

The battery charger must be

connected to a 120 VAC supply (utility power).

2.3.1

Standby Mode

When the generator set master switch is in the AUTO

position, the controller is in standby mode. Engine

runtime hours are shown on the display. A remote start

signal (contact closure) will start and run the generator

set.

Control or Indicator

Item

Generator set master

Three-position

switch

LED display

Runtime hours

Crank indication Displays CC_1, CC_2, or CC_3 to indicate the first, second, or third attempt to

Application

code version

number

Fault codes

Figure 2-2 DC-RET Controls and Indicators

Section 2 Operation

2.3.2

Note: Sleep mode is disabled on controllers with

On controllers with the sleep mode enabled: When the

generator set master switch is in the AUTO position, the

controller powers down if there is no start signal for 48

hours after shutdown. In sleep mode, the controller

display is dark and battery draw is minimized. A remote

start signal (from a transfer switch or a remote start/stop

switch connected to controller leads 3 and 4) reactivates

the controller. Moving the generator set master switch to

the RUN position also activates the controller.

2.4 Generator Set Operation

2.4.1

Local Starting

Move the generator set master switch to the RUN

position to immediately start the generator set.

Auto (Automatic) Starting

Move the generator set master switch to the AUTO

position to allow startup by an automatic transfer switch

(ATS) or remote start/stop switch, if equipped. Close a

contact across engine start leads 3 and 4 to signal the

controller to start the generator set.

Crank Cycle

The controller attempts to start the generator set three

times (three crank cycles, 15 seconds crank and

15 seconds off). See Figure 2-2 for display information

during the crank cycle. If the generator set does not start

in three attempts, the system shuts down on an

overcrank fault. See Section 2.6.

Description

RUN-OFF/RESET-AUTO switch functions as the generator set operation and

controller reset switch.

Displays total generator set runtime hours while the generator set is running and

when no other codes are displayed.

start the engine. The last digit flashes during the crank cycle rest periods.

The application code version number (v#.##) is displayed during the first

2 seconds of the crank cycle.

Flashes a 2- or 3-letter fault code to indicate various fault conditions. See

Section 2.6.

Sleep Mode

application code version 1.13 or higher. Check

the code version during the crank cycle; see

Figure 2-2.

Starting Generator Set

TP-6517 4/09