Full Product Manual

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2.4.3 EcoExercise (26RCA/L only)
A new 90 second EcoExercise cycle is available for the 26RCA/L model only. Its main features are:
• Lowers the fuel cost.
• In cold temperatures, limits condensation build- up in the crankcase.
The EcoExercise Cycle runs for 60 seconds at 3600 RPM with active diagnostics, and 30 seconds at reduced speed. Monthly
EcoExercise cycles are recommended for cold climates.
2.4.4 Unloaded Full-Speed Exercise
The unloaded full-speed exercise runs the generator set at full speed for 20minutes without transferring the load.
To set an unloaded full-speed exercise, follow the procedure in the Changing the Exercise Settings section and select Exercise
Mode: Unloaded Full.
2.4.5 Loaded Full-Speed Exercise (with RXT 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. After 20 minutes, the load is transferred back to the utility source. The engine runs without load for 5 minutes
or until cool, and then shuts down automatically.
Note:
With a loaded exercise, power to the building is lost for up to 10 seconds during load transfer.
For a loaded exercise controlled by theRDC2 controller, a Model RXT transfer switch must be connected to the generator set.
To set a loaded exercise, follow the procedure in the Changing the Exercise Settings section and select Exercise Type:
Loaded.
For a loaded exercise with a transfer switch other than a Kohler
®
Model RXT, program the exercise at the transfer switch
controller. Refer to the transfer switch operation manual for instructions.
2.4.6 Shutdown During Exercise (Advanced Diagnostic)
The following advanced diagnostic operation applies to RDC2 controllers with firmware versions 5.04 and higher.
If the generator set shuts down on a fault during an exercise, the controller will try to restart the engine. If the engine starts, the
generator set will run at full speed for two minutes and then stop. The event history will show Advanced Diagnostic Active. The
exercise schedule is maintained.
If the engine does not start, the shutdown message will be displayed. Correct the fault condition and reset the fault as described
in the Faults section.
2.4.7 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.
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.