Table of Contents

Product Identification Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety Precautions and Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Section 1 Service Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Section 2 Generator Set Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.1 Operating Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.2 Prestart Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.3 Exercising the Generator Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4 Generator Set Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.1 Local Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.2 Automatic Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.3 Remote Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.4 Engine Start Crank Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.5 Engine Cooldown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.4.6 Automatic Operation with Model RXT Transfer Switch . . . . . . . . . . . . . . 16 2.4.7 Automatic Operation with Model RDT or RSB Transfer Switches . . . . . 17

2.5 Exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.5.1 Unloaded Cycle Exercise with Complete System Diagnostics . . . . . . . . 17 2.5.2 Unloaded Full-Speed Exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.5.3 Loaded Full-Speed Exercise (with RXT only) . . . . . . . . . . . . . . . . . . . . . . 18 2.5.4 Shutdown During Exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.5.5 Power Failure During Exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.5.6 Exerciser Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.5.7 Setting the Exerciser at Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.5.8 Changing the Exercise Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.6 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.6.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.6.2 Shutdowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.6.3 ATS Communication Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.6.4 Resetting the Controller after a Fault Shutdown . . . . . . . . . . . . . . . . . . . . 22 2.6.5 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.7 Model RXT Transfer Switch Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.7.1 Source Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.7.2 ATS Control Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2.7.3 Time Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2.7.4 ATS Load Control Relay Time Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Section 3 RDC2 Controller Operation			27
3.1	RDC2 Generator Set / Transfer Switch Controller		27
3.2	Controls and Indicators		27
	3.2.1	Controller Keypad	28
	3.2.2	LED Indicators	28
	3.2.3	LCD Display	29
3.3	Controller Power		30
3.4	Battery Charging		30
3.5	Changing Settings		30
3.6	Controller Menus		32
3.7	Main Menu		32
3.8	Overview Menu		33
3.9	Engine Metering Menu		33
3.10	Generator Metering Menu		34
3.11	Generator Set Information Menu		35

TP-6810 11/13

Table of Contents 3

38RCL, 48RCL, 60RCL specifications

The Kohler RCL series of generators, particularly the 60RCL, 48RCL, and 38RCL models, represents a premium choice for those seeking reliable power solutions for residential and light commercial applications. Each model is tailored to meet diverse power needs, ensuring uninterrupted electricity supply during outages.

The 60RCL is engineered for maximum performance, offering 60 kW of power. This model is ideal for larger homes or small businesses that require dependable backup power. Its powerful Kohler engine is designed to deliver a quiet, smooth performance, while the advanced sound-dampening features keep noise levels to a minimum. The 48RCL offers a slightly lower output at 48 kW, making it suitable for medium-sized homes. Its compact design allows for flexible installation options, whether it’s outdoors or in a utility area, while still providing robust power during critical times.

The 38RCL, while the smallest of the series with 38 kW output, is perfect for homes that need a reliable backup generator without the bulk. Its streamlined design does not compromise on performance, making it an excellent choice for energy-efficient homes. All models in the RCL series come equipped with Kohler's Command Pro commercial-grade engine, ensuring longevity and reliability even in the harshest conditions.

A standout feature of the RCL series is the integrated KOHLER® 2.4-inch color display, which allows users to monitor generator performance in real-time. This user-friendly interface provides vital information such as operational status, run time, and maintenance notifications. Additionally, the series is designed with automatic transfer switches that allow for seamless switching between utility and generator power.

Moreover, these generators incorporate advanced control systems with remote monitoring capabilities, enabling users to check the status of their power supply from a smartphone or tablet. Designed with efficiency in mind, the RCL series boasts a fuel-efficient operation that supports both natural gas and propane, catering to diverse energy preferences.

In summary, the Kohler 60RCL, 48RCL, and 38RCL generators combine high performance, advanced technology, and user-friendly features. They are reliable solutions for anyone looking to safeguard their power needs, ensuring peace of mind when it matters most.

Kohler 38RCL, 48RCL, 60RCL manual Table of Contents

Models: 38RCL 48RCL 60RCL

38RCL, 48RCL, 60RCL specifications