Kohler 14/20RES, Operation Manual

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TP-6734 5/10 23 Section 2 Operation
6. After 20 minutes, the ATS transfers the load back to
utility power. The engine runs for the cooldown
cycle 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.
2.7.4 Exerciser Reset and Disable
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 time and
day. The previous exercise setting is replaced by the
new time, day, and loaded or unloaded condition.
To disable the exerciser, press and hold the OFF and
DOWN arrow or EXERCISE buttons together for
3 seconds.
2.7.5 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 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.
When Utility power is restored, the ATS will re-transfer to
the utility source through normal timing sequences.
2.8 Test
An operator can use the buttons on the RDC/DC
controller to test the generator set and transfer switch
(model RRT only) operation at any time. Unlike the
exercise function, a test does not start or stop
automatically.
The operator must use the RDC/DC
controller to start and stop the test. Follow the
instructions below to run an unloaded or loaded test.
2.8.1 Unloaded Test
An unloaded test runs the generator set without
signalling the transfer switch to transfer the electrical
load from the utility source to the generator set.
Press the RUN button to start an unloaded test. The
engine cranks and starts.
tnLd appears on the display
once the generator is running. The RUN LED is
illuminated. The engine runs at normal operating speed
(3600 RPM) during the test sequence.
Pressing the OFF button during the crank cycle stops
the cranking.
No other buttons are acknowledged
during the crank cycle.
There are two ways to end an unloaded test:
D
Press the AUTO button to shut down the generator
set and enter AUTO mode.
D
Press the OFF button to shut down the generator set.
The cooldown time delay is ignored.
Figure 2-6 describes the effect of pressing the buttons
during a test, with the engine running and no active
faults.
Button
Press
Response
AUTO Shuts down the engine, through normal
timing sequences, and goes to the AUTO
mode. AUTO LED turns ON. RUN LED
turns OFF.
OFF Ends the test and shuts down the
generator. The cooldown time delay is
ignored when a test is ended. The RUN
LED turns OFF. The OFF LED turns ON
and then flashes every 2 seconds.
RUN No effect.
DOWN
arrow/
EXERCISE Causes the ATS to transfer to the
emergency source. The display indicates a
Loaded Test,
t Ld.
Figure 2-6 Button Function During Test
2.8.2 Loaded Test
A loaded test starts the generator set and then signals
the model RRT transfer switch to transfer the electrical
load from the utility source to the generator set. The load
is transferred back to the utility source before the
generator set shuts down.
To run a loaded test:
1. Press the RUN button to start an unloaded test as
described in Section 2.8.1. tnLd appears on the
display once the generator is running.
2. Press the down arrow button (RDC) or the exercise
button (DC) to signal the ATS to transfer the load.
The display indicates a loaded test,
t Ld.
3. To end the test, press the AUTO button to shut
down the generator set through normal timing
sequences.
The engine cooldown cycle runs