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 2-3 and select Exercise Mode: Unloaded Full.

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 re-transfer to the utility source through normal timing sequences.

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 power--up, the date is displayed with the year flashing. Use the up or down arrow key to step to the current year.

18 Section 2 Generator Set Operation

TP-6905 6/14

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Kohler 24RCL manual Unloaded Full-Speed Exercise, Loaded Full-Speed Exercise with RXT only, Shutdown During Exercise
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24RCL specifications

The Kohler 24RCL is a powerful, compact generator designed to provide reliable backup power for residential applications. Equipped with a robust 24 kW output, this generator is engineered for both efficiency and durability, making it an excellent choice for homeowners looking to safeguard their property against outages.

One of the standout features of the Kohler 24RCL is its quiet operation. With a noise level significantly lower than that of traditional generators, it allows homeowners to maintain their comfort without the disruptive sounds often associated with backup power systems. This is particularly important in residential neighborhoods where maintaining peace and quiet is essential.

The generator is powered by a liquid-cooled Kohler engine, which ensures consistent performance and longevity. Liquid-cooled engines are known for their ability to provide better thermal management, thereby extending the life of the engine while also improving efficiency. Moreover, the Kohler 24RCL utilizes a proven design that enables quick starts and reliable operation, even in the most challenging conditions.

Another key technology in the 24RCL is its integrated transfer switch, which automatically detects power outages and switches the home’s electrical supply to the generator. This seamless transition ensures that there is no disruption in power, making it an ideal solution for critical loads such as refrigerators, medical equipment, and security systems. The generator’s advanced control system allows for easy monitoring and maintenance, providing users with peace of mind whenever they rely on their backup power.

The Kohler 24RCL boasts a weather-resistant enclosure, designed to withstand the elements and provide protection against rain, snow, and harsh winds. This rugged construction also contributes to the longevity of the unit, ensuring that it can perform reliably year after year.

Sustainability is another driving factor in the design of the Kohler 24RCL. The generator features efficient fuel consumption, which not only helps to reduce operating costs but also minimizes the environmental impact. With many homeowners increasingly focused on eco-friendly solutions, the 24RCL fits seamlessly into a sustainable lifestyle.

Overall, the Kohler 24RCL is a powerful, efficient, and quiet backup generator that combines advanced technology with rugged reliability. Its features make it a standout choice for homeowners seeking a dependable power solution that prioritizes convenience, safety, and sustainability. Whether facing severe weather or unexpected outages, the Kohler 24RCL ensures that homes remain powered and protected.
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