Loaded Exercise (With Rrt Only); Power Failure During Exercise Cycle; Exerciser Reset; Exercise Disable - Kohler 14RES Manual

the controller detects low battery voltage, Lb (low
battery) or LCb (low charging battery) is displayed
and the exercise does not start.
Engine speed. Engine speed is measured at low
D
speed and full speed.
underspeed (US) condition will result in a fault
condition and shutdown. (Firmware version 2.08 or
higher.)
Oil pressure. Oil pressure is verified to ensure
D
proper lubrication of critical engine components.
Pressure is monitored at both low and full speeds. If
the oil pressure is low, LOP (low oil pressure) is
displayed and the generator set shuts down.
Generator output frequency and voltage.
D
Operating the generator at full speed allows the
RDC/DC controller to check the output power for
correct voltage, frequency, and stability. When the
engine is running at full speed, the controller verifies
that the voltage and frequency are within acceptable
limits. UU (undervoltage), OU (overvoltage), UF
(underfrequency), or
displayed if the voltage or frequency is out of range.
(Firmware version 2.08 or higher.)
4.6.3

Loaded Exercise (with RRT only)

A loaded exercise starts the generator set, ramps up to
full speed, and then transfers the electrical load from the
utility source to the generator set.
transferred back to the utility source before the
generator set shuts down.
Procedure to Set a Loaded Exercise
1. Verify that the control is in the AUTO mode with the
AUTO LED ON and the Utility power available.
2. Press the down arrow button (RDC) or the exercise
button (DC) to initiate the engine start signal.
3. The generator begins its crank cycles. During the
crank cycles CCn appears on the display. No
button presses are acknowledged during the crank
cycles.
4. When the generator is running, EnLd appears on
the display and the AUTO LED is illuminated. The
generator runs at low speed with no load.
5. Press the down arrow button (RDC) or exercise
button (DC) a second time. The generator ramps
up to normal operating speed (typically 3600 RPM)
and the ATS transfers the load.
TP-6735 7/17
An overspeed (OS) or
OF (overfrequency)
The load is
6. E Ld appears on the display and the AUTO LED is
illuminated.
operating speed for twenty minutes with load.
7. After 20 minutes, the ATS transfers the load back to
utility power. The engine runs for 5 minutes or until
cool, and then shuts down.
The exercise time is set to the time the down arrow
button (RDC) or exercise button (DC) was initially
pressed. A loaded, full-speed exercise will occur at the
same time every seven days.
Other transfer switches: For a loaded exercise with a
transfer switch other than a Kohlerr Model RRT, refer to
the transfer switch operation manual.
4.6.4 Power Failure During Exercise
Cycle
If the utility power is lost during an unloaded exercise,
the ATS transfers to the emergency source, the
exercise is ended and the control remains in the AUTO
is
mode.
If the utility power is lost during a loaded exercise, the
exercise is ended. The ATS remains in the emergency
position and the control goes into the AUTO mode.
The generator set continues to run and supply power to
the load for the duration of the utility power outage.
When Utility power is restored, the ATS will re-transfer
to the utility source through normal timing sequences.
4.6.5

Exerciser Reset

To reset the exerciser to run at a different day and/or
time, or to switch between a loaded and unloaded
exercise, follow the procedures above to start an
unloaded or loaded exercise on the desired day and
time. The previous exercise setting is replaced by the
new day, time, and loaded or unloaded condition.
4.6.6

Exercise Disable

Note: With the RDT and RSB transfer switches, it is
possible to have two exercise settings (one set at
the generator set controller, and one set at the
ATS controller). If the exercise times overlap, the
ATS exercise setting takes priority.
If a transfer switch other than the Model RRT is used and
the exerciser is set at the transfer switch controller, you
can disable the exercise on the RDC/DC controller.
To disable the exerciser on the RDC/DC controller,
press and hold the OFF and DOWN arrow or
EXERCISE buttons together for 3 seconds.
The generator runs at normal
Section 4 Controller 43