D ATS connection. The controller verifies that the Model RXT ATS interface board is connected.
DBattery voltage. Battery voltage is checked before exercise to verify engine starting capability. Battery voltage provides a measurement of battery health. If the controller detects low battery voltage, low battery or low charging battery is displayed and the exercise does not start.
DCoolant level check. The coolant level is checked.
D Communication integrity tests. J1939, RBUS, Ethernet, and USB are monitored for messages indicating that the controller and wiring are reliable.
DEngine speed. Engine speed is measured at low speed and full speed. An overspeed or underspeed condition will result in a fault condition and shutdown.
D Generator output frequency and voltage. Operating the generator at full speed allows the RDC2 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. A fault message is displayed if the voltage or frequency is out of range.
D Oil pressure. Oil pressure is verified to ensure proper lubrication of critical engine components. Pressure is monitored at both low and full speeds. If the oil pressure is low, low oil pressure is displayed and the generator set shuts down.
2.5.2Unloaded Full-Speed Exercise
The unloaded full speed exercise runs the generator set at full speed for 20 minutes without transferring the load.
To set an unloaded full speed exercise, follow the procedure in Figure
2.5.3Loaded 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. The load is transferred back to the utility source before the generator set shuts down.
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 the RDC2 controller, a Model RXT transfer switch must be connected to the
generator set. To set a loaded exercise, follow the procedure in Section 2.5.8 and select Exercise Type: Loaded.
For a loaded exercise with a transfer switch other than a Kohlerr Model RXT, program the exercise at the transfer switch controller. Refer to the transfer switch operation manual for instructions.
2.5.4Shutdown During Exercise
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 Section 2.6.
2.5.5Power Failure During Exercise
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
2.5.6Exerciser Reset
To reset the exerciser to run at a different day and/or time or to change the exercise mode, follow the procedure in Section 2.5.7 to change the exerciser settings.
2.5.7Setting the Exerciser at Power-up
When power is connected to the controller, you will be prompted to set the date, time, and exercise schedule.
1.At
18 Section 2 Generator Set Operation |
