Residential/Commercial Generator Sets

1 Operation Residential/Commercial Generator Sets Models: 14/20 RESA. 14/20 RESAL. 20 RESC. 20 RESCL. Controller: RDC2. TP-6804 2/21o WARNING: This product can expose you to chemicals, including carbon monoxide and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to Kohler strongly recommends that only factory-authorized distributors or dealers install and service the Generator . Product Identification Information Product identification numbers determine service parts. Controller Identification Record the product identification numbers in the spaces Record the controller description from the Generator set below immediately after unpacking the products so that operation manual, spec sheet, or sales invoice.

2 The numbers are readily available for future reference. Record field-installed kit numbers after installing the Controller Description kits. Generator Set Identification Numbers Engine Identification Record the product identification information from the Record the product identification numbers from the engine nameplate. Generator set nameplate(s). Manufacturer Model Designation Model Designation Specification Number Serial Number Serial Number Accessory Number Accessory Description Table of Contents Product Identification Information .. 2. Safety Precautions and Instructions .. 7. Introduction .. 11. Service Assistance .. 13. Section 1 Descriptions and Service Views .. 15. Introduction .. 15. Engine .. 15. Alternator.

3 15. Generator Set Enclosure .. 15. Transfer Switch .. 15. Controllers .. 15. OnCue Plus Generator Management System .. 17. Accessories .. 17. Cold Weather Package Kit, 120/240 VAC .. 17. Programmable Interface Module (PIM) .. 17. Load Management .. 17. Carburetor Heater, 120/240 VAC .. 18. Fuel Regulator Heater, 120/240 VAC (20kW models only) .. 19. Emergency Stop Kit .. 19. battery Heater Kit, 120/240 VAC .. 20. Breather Tube Heater and Oil Heater Kit, 120/240 VAC .. 20. Alternator Weather Cover Kit .. 21. Oil Pressure Sensor Boot Kit .. 21. Service Views .. 22. Section 2 Generator Set Operation .. 23. Operating Area .. 23. Prestart Checklist .. 23. Exercising the Generator Set .. 24. Generator Set Operation.

4 24. Local Starting and Stopping .. 24. Automatic Operation .. 24. Remote Starting and Stopping .. 24. Remote Emergency Stop Switch .. 24. Shutdown Switch .. 25. Engine Start Crank Cycle .. 25. Engine Cooldown .. 26. Automatic Operation with Model RXT Transfer Switch .. 26. Automatic Operation with Other Transfer Switches .. 26. Exercise .. 26. Setting the Exerciser .. 27. Unloaded Cycle Exercise with Complete System Diagnostics .. 27. Unloaded Full-Speed Exercise .. 27. Loaded Full-Speed Exercise (with RXT only) .. 28. Shutdown During Exercise (Advanced Diagnostic) .. 28. Power Failure During Exercise Cycle .. 28. Faults .. 29. Warnings .. 29. Shutdowns .. 29. ATS Communication Errors .. 29. Resetting the Controller after a Fault Shutdown.

5 29. Faults Related to Paralleling .. 33. TP-6804 2/21 Table of Contents Table of Contents, continued Section 3 RDC2 Controller Operation .. 35. RDC2 Generator Set/ Transfer Switch Controller .. 35. Controls and Indicators .. 35. Controller Keypad .. 36. LED Indicators .. 36. LCD Display .. 37. Controller Power .. 38. battery Charging .. 38. Changing Settings .. 38. Setting the Exerciser .. 40. Setting the Exerciser at Controller Power-up .. 40. Changing the Exercise Settings .. 40. RDC2 Controller Menus .. 42. Main Menu .. 42. Overview Menu .. 44. Engine Metering Menu .. 44. Generator Metering Menu .. 45. Generator Set Information Menu .. 46. Genset Run Time Menu .. 46. Genset System Menu .. 47. ATS Status Menu.

6 48. ATS Configuration Menu .. 49. Date and Time Menu .. 50. Networking Information Menus .. 50. Networking Status Submenu .. 51. Networking Configuration Submenu (OnCue Password) .. 52. RBUS Information .. 54. Remote Devices Submenu .. 55. Programmable Interface Module (PIM) Status Menu .. 56. Load Control Menus .. 57. Event Log .. 58. Section 4 Scheduled Maintenance .. 59. Scheduled Maintenance .. 59. Service Schedule, 14 kW Models .. 60. Service Schedule, 20 kW Models .. 61. Lubrication System .. 62. Low Oil Pressure Shutdown .. 62. Oil Check .. 62. Engine Oil Recommendation .. 62. Oil Change Procedure .. 63. Resetting the Maintenance Timer .. 64. Oil Cooler (20 kW models) .. 64. Spark Plugs .. 64. Air Cleaner Service.

7 65. Air Cleaner, 14 kW Models .. 65. Air Cleaner, 20 kW Models .. 66. Cooling System .. 67. Exhaust System .. 67. Fuel Regulator Vent Tubes .. 67. battery .. 68. Cleaning the battery .. 68. Checking Electrolyte Level .. 68. Checking Specific Gravity .. 69. Storage Procedure .. 70. Table of Contents TP-6804 2/21. Table of Contents, continued Lubricating System .. 70. Fuel System .. 70. Cylinder Lubrication .. 70. Exterior Preparation .. 70. battery .. 70. Section 5 Troubleshooting .. 71. Introduction .. 71. Fault Messages .. 71. Circuit Protection .. 71. Controller Internal Circuit Protection .. 71. Line Circuit Breaker .. 71. USB Port and Auxiliary Winding Mini-Breaker .. 71. Stop Switches .. 71. Thermostat .. 72.

8 Troubleshooting .. 73. Appendix A Abbreviations .. 75. Appendix B DC2 Controller Operation .. 77. TP-6804 2/21 Table of Contents Notes 6 TP-6804 2/21. Safety Precautions and Instructions IMPORTANT SAFETY INSTRUCTIONS. Electromechanical equipment, Accidental Starting WARNING. including Generator sets, transfer switches, switchgear, and accessories, WARNING. can cause bodily harm and pose life-threatening danger when improperly installed, operated, or maintained. To prevent accidents be Explosion. aware of potential dangers and act Can cause severe injury or death. safely. Read and follow all safety Relays in the battery charger precautions and instructions. SAVE Accidental starting. cause arcs or sparks. THESE INSTRUCTIONS.

9 Can cause severe injury or death. Locate the battery in a well-ventilated Disconnect the battery cables before area. Isolate the battery charger from This manual has several types of safety working on the Generator set. precautions and instructions: Danger, explosive fumes. Remove the negative (- ) lead first Warning, Caution, and Notice. when disconnecting the battery . battery electrolyte is a diluted Reconnect the negative (- ) lead last sulfuric acid. battery acid can cause when reconnecting the battery . severe injury or death. battery acid DANGER can cause blindness and burn skin. Always wear splashproof safety Disabling the Generator set. DANGER indicates a hazardous goggles, rubber gloves, and boots Accidental starting can cause situation which, if not avoided, will when servicing the battery .

10 Do not severe injury or death. Before result in death or serious injury. open a sealed battery or mutilate the working on the Generator set or battery case. If battery acid splashes in equipment connected to the set, the eyes or on the skin, immediately disable the Generator set as follows: WARNING (1) Press the Generator set off/reset flush the affected area for 15 minutes with large quantities of clean water. button to shut down the Generator set. WARNING indicates a hazardous Seek immediate medical aid in the case (2) Disconnect the power to the battery situation which, if not avoided, could of eye contact. Never add acid to a charger , if equipped. (3) Remove the result in death or serious injury. battery after placing the battery in battery cables, negative (- ) lead first.