Kohler 24RCL User Manual

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Page 1

Operation

Residential/Light Commercial Generator Sets

Model:

24RCL

Controller:

RDC2

TP-6905 6/14

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California Proposition 65

WARNING

Engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product Identification Information

Product identification numbers determine service parts. Record the product identification numbers in the spaces below immediately after unpacking the products so that the numbers are readily available for future reference. Record field-installed kit numbers after installing the kits.

Generator Set Identification Numbers

Record the product identification numbers from the generator set nameplate(s).

Model Designation Specification Number Serial Number

Accessory Number Accessory Description

Controller Identification

Record the controller description from the generator set operation manual, spec sheet, or sales invoice.

Controller Description

Engine Identification

Record the product identification information from the engine nameplate.

Manufacturer Model Designation Serial Number

TP-6905 6/142

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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 27....................................................

2.7 Model RXT Transfer Switch Operation 27....................................

2.7.1 Source Availability 27.............................................

2.7.2 ATS Control Sequence of Operation 28..............................

2.7.3 Time Delays 28..................................................

2.7.4 ATS Load Control Relay Time Delay 28.............................

Section 3 RDC2 Controller Operation 29.......................................................

3.1 RDC2 Generator Set / Transfer Switch Controller 29...........................

3.2 Controls and Indicators 29.................................................

3.2.1 Controller Keypad 30.............................................

3.2.2 LED Indicators 30................................................

3.2.3 LCD Display 31..................................................

3.3 Controller Power 32.......................................................

3.4 Battery Charging 32......................................................

3.5 Changing Settings 32.....................................................

3.6 Controller Menus 34

3.7 Main Menu 34............................................................

3.8 Overview Menu 35........................................................

3.9 Engine Metering Menu 35.................................................

3.10 Generator Metering Menu 36...............................................

3.11 Generator Set Information Menu 37.........................................

......................................................

TP-6905 6/14 Table of Contents 3

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Table of Contents, continued

3.12 Genset Run Time Menu 37................................................

3.13 Genset System Menu 38..................................................

3.14 ATS Status Menu 39......................................................

3.15 ATS Configuration Menu 40................................................

3.16 Date and Time Menu 41...................................................

3.17 Networking Information Menus 42..........................................

3.17.1 Networking Status Submenu 43....................................

3.17.2 Networking Configuration Submenu (OnCue Plus Password) 44........

3.17.3 RBUS Information Submenu 45....................................

3.17.4 Remote Devices Submenu 46......................................

3.18 Programmable Interface Module (PIM) Menus 47.............................

3.19 Load Control Menus 48...................................................

Section 4 Scheduled Maintenance 49..........................................................

4.1 General Maintenance 49..................................................

4.2 Service Schedule 51......................................................

4.3 Lubrication System 52....................................................

4.3.1 Oil Specifications 52..............................................

4.3.2 Oil Check 52.....................................................

4.3.3 Oil Additions 52..................................................

4.3.4 Oil and Filter Change 52...........................................

4.4 Air Cleaner 54...........................................................

4.5 Exhaust System 54.......................................................

4.6 Cooling System 55.......................................................

4.6.1 Checking and Filling Coolant 55....................................

4.6.2 Cooling System Inspection 56......................................

4.6.3 Draining Cooling System 56.......................................

4.6.4 Flushing and Cleaning 56..........................................

4.6.5 Filling Cooling System 56..........................................

4.7 Ignition System 57........................................................

4.8 Battery 59...............................................................

4.9 Storage Procedure 60.....................................................

Section 5 Troubleshooting 61.................................................................

5.1 Introduction 61...........................................................

5.2 USB Port 61.............................................................

5.3 Fault Messages 61.......................................................

5.4 Circuit Protection 61......................................................

5.4.1 Load Circuit Breaker 61...........................................

5.4.2 Fuses 61........................................................

5.4.3 Controller Internal Circuit Protection 61..............................

5.5 Generator Set Troubleshooting 62..........................................

5.6 Controller Troubleshooting 63..............................................

Appendix A Abbreviations 65................................................................

TP-6905 6/14Table of Contents4

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Safety Precautions and Instructions

IMPORTANT SAFETY INSTRUCTIONS.

Electromechanical equipment, including generator sets, transfer switches, switchgear, and accessories, can cause bodily harm and pose life-threatening danger when improperly installed, operated, or maintained. To prevent accidents be aware of potential dangers and act safely. Read and follow all safety precautions and instructions. SAVE THESE INSTRUCTIONS.

This manual has several types of safety precautions and instructions: Danger, Warning, Caution, and Notice.

DANGER

Danger indicates the presence of a hazard that will cause severe

personal injury, death,orsubstantial property damage.

WARNING

Warning indicates the presence of a hazard that can cause severe

personal injury, death, or substantial property damage.

CAUTION

Caution indicates the presence of a hazard that will or can cause minor personal injury or property damage.

NOTICE

Notice communicates installation, operation, or maintenance information that is safety related but not hazard related.

Safety decals affixed to the equipment in prominent places alert the operator or service technician to potential hazards and explain how to act safely. The decals are shown throughout this publication to improve operator recognition. Replace missing or damaged decals.

Accidental Starting

WARNING

Accidental starting. Can cause severe injury or death.

Disconnect the battery cables before working on the generator set. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery.

Disabling the generator set. Accidental starting can cause severe injury or death. Before

working on the generator set or equipment connected to the set, disable the generator set as follows: (1) Press the generator set off/reset button to shut down the generator set. (2) Disconnect the power to the battery charger, if equipped. (3) Remove the battery cables, negative (--) lead first. Reconnect the negative (--) lead last when reconnecting the battery. Follow these precautions to prevent the starting of the generator set by the remote start/stop switch.

Battery

WARNING

Sulfuric acid in batteries. Can cause severe injury or death.

Wear protective goggles and clothing. Battery acid may cause blindness and burn skin.

WARNING

Explosion. Can cause severe injury or death. Relays in the battery charger cause arcs or sparks.

Locate the battery in a well-ventilated area. Isolate the battery charger from explosive fumes.

Battery electrolyte is a diluted sulfuric acid. Battery acid can cause severe injury or death. Battery acid

can cause blindness and burn skin. Always wear splashproof safety goggles, rubber gloves, and boots when servicing the battery. Do not open a sealed battery or mutilate the battery case. Ifbattery acid splashes in the eyes or on the skin, immediately flush the affected area for 15 minutes with large quantities of clean water. Seek immediate medical aid in the case of eye contact. Never add acid to a battery after placing the battery in service, as this may result in hazardous spattering of battery acid.

Battery acid cleanup. Battery acid can cause severe injury or death.

Battery acid is electrically conductive and corrosive. Add 500 g (1 lb.) of bicarbonate of soda (baking soda) to a container with 4 L (1 gal.) of water and mix the neutralizing solution. Pour the neutralizing solution on the spilled battery acid and continue to add the neutralizing solution to the spilled battery acid until all evidence of a chemical reaction (foaming) has ceased. Flush the resulting liquid with water and dry the area.

Battery gases. Explosion can cause severe injury or death. Battery gases

can cause an explosion. Do not smoke or permit flames or sparks to occur near a battery at any time, particularly when it is charging. Do not dispose of a battery in a fire. To prevent burns and sparks that could cause an explosion, avoid touching the battery terminals with tools or other metal objects. Remove all jewelry before servicing the equipment. Discharge static electricity from your body before touching batteries by first touching a grounded

TP-6905 6/14 5Safety Precautions and Instructions

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metal surface away from the battery. To avoid sparks, do not disturb the battery charger connections while the battery is charging. Always turn the battery charger off before disconnecting the battery connections. Ventilate the compartments containing batteries to prevent accumulation of explosive gases.

Battery short circuits. Explosion can cause severe injury or death.

Short circuits can cause bodily injury and/or equipment damage. Disconnect the battery before generator set installation or maintenance. Remove all jewelry before servicing the equipment. Use tools with insulated handles. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery. Never connect the negative (--) battery cable to the positive (+) connection terminal of the starter solenoid. Do not test the battery condition by shorting the terminals together.

Engine Backfire/Flash Fire

WARNING

Fire. Can cause severe injury or death.

Do not smoke or permit flames or sparks near fuels or the fuel system.

Servicing the fuel system. A flash fire can cause severe injury or death.

Do not smoke or permit flames or sparks near the carburetor, fuel line, fuel filter, fuel pump, or other potential sources of spilled fuels or fuel vapors. Catch fuels in an approved container when removing the fuel line or carburetor.

Servicing the air cleaner. A sudden backfire can cause severe injury or death. Do not operate the generator

set with the air cleaner removed.

Combustible materials. A fire can cause severe injury or death.

Generator set engine fuels and fuel vapors are flammable and explosive. Handle these materials carefully to

minimize the risk of fire or explosion. Equip the compartment or nearby area with a fully charged fire extinguisher. Select a fire extinguisher rated ABC or BC for electrical fires or as recommended by the local fire code or an authorized agency. Train all personnel on fire extinguisher operation and fire prevention procedures.

Exhaust System

WARNING

Carbon monoxide. Can cause severe nausea, fainting, or death.

The exhaust system must be leakproof and routinely inspected.

Generator set operation. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide

is an odorless, colorless, tasteless, nonirritating gas that can cause death if inhaled for even a short time. Avoid breathing exhaust fumes when working on or near the generator set. Never operate the generator set inside a building. Never operate the generator set where exhaust gas could seep inside or be drawn into a potentially occupied building through windows, air intake vents, or other openings.

Carbon monoxide symptoms. Carbon monoxide can cause severe nausea, fainting, or death. Carbon

monoxide is a poisonous gas present in exhaust gases. Carbon monoxide is an odorless, colorless, tasteless, nonirritating gas that can cause death if inhaled for even a short time. Carbon monoxide poisoning symptoms include but are not limited to the following:

D Light-headedness, dizziness D Physical fatigue, weakness in

joints and muscles

D Sleepiness, mental fatigue,

inability to concentrate or speak clearly, blurred vision

possibility of carbon monoxide poisoning. Seek medical attention if the condition of affected persons does not improve within minutes of breathing fresh air.

Carbon monoxide detectors. Carbon monoxide can cause severe nausea, fainting, or death. Install

carbon monoxide detectors on each level of any building adjacent to the generator set. Locate the detectors to adequately warn the building’s occupants of the presence of carbon monoxide. Keep the detectors operational at all times. Periodically test and replace the carbon monoxide detectors according to the manufacturer’s instructions.

Fuel System

WARNING

Explosive fuel vapors. Can cause severe injury or death.

Use extreme care when handling, storing, and using fuels.

The fuel system. Explosive fuel vapors can cause severe injury or death. Vaporized fuels are highly

explosive. Use extreme care when handling and storing fuels. Store fuels in a well-ventilated area away from spark-producing equipment and out of the reach of children. Never add fuel to the tank while the engine is running because spilled fuel may ignite on contact with hot parts or from sparks. Do not smoke or permit flames or sparks to occur near sources of spilled fuel or fuel vapors. Keep the fuel lines and connections tight and in good condition. Do not replace flexible fuel lines with rigid lines. Use flexible sections to avoid fuel line breakage caused by vibration. Do not operate the generator set in the presence of fuel leaks, fuel accumulation, or sparks. Repair fuel systems before resuming generator set operation.

Explosive fuel vapors can cause severe injury or death. Tak e

additional precautions when using the following fuels:

TP-6905 6/146 Safety Precautions and Instructions

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Propane (LP)—Adequate ventilation is mandatory. Because propane is heavier than air, install propane gas detectors low in a room. Inspect the detectors per the manufacturer’s instructions.

Hazardous Voltage/ Moving Parts

DANGER

CAUTION

Natural Gas—Adequate ventilation is

mandatory. Because natural gas rises, install natural gas detectors high in a room. Inspect the detectors per the manufacturer’s instructions.

Gas fuel leaks. Explosive fuel vapors can cause severe injury or death. Fuel leakage can cause an

explosion. Check the LP vapor gas or natural gas fuel system for leakage by using a soap and water solution with the fuel system test pressurized to 6--8 ounces per square inch (10--14 inches water column). Do not use a soap solution containing either ammonia or chlorine because both prevent bubble formation. A successful test depends on the ability of the solution to bubble.

Hazardous Noise

CAUTION

Hazardous noise. Can cause hearing loss.

Never operate the generator set without a muffler or with a faulty exhaust system.

Engine noise. Hazardous noise can cause hearing loss. Generator sets

not equipped with sound enclosures can produce noise levels greater than 105 dBA. Prolonged exposure to noise levels greater than 85 dBA can cause permanent hearing loss. Wear hearing protection when near an operating generator set.

Hazardous voltage. Will cause severe injury or death.

Disconnect all power sources before opening the enclosure.

WARNING

Hazardous voltage. Can cause severe injury or death.

Operate the generator set only when all guards and electrical enclosures areinplace.

Moving parts.

WARNING

Hazardous voltage. Backfeed to the utility system can cause property damage, severe injury, or death.

If the generator set is used for standby power, install an automatic transfer switch to prevent inadvertent interconnection of standby and normal sources of supply.

DANGER

Hazardous voltage. Will cause severe injury or death.

This equipment must be installed and serviced by qualified electrical personnel.

Welding the generator set. Can cause severe electrical equipment damage.

Never weld components of the generator set without first disconnecting the battery, controller wiring harness, and engine electronic control module (ECM).

WARNING

Airborne particles. Can cause severe injury or blindness.

Wear protective goggles and clothing when using power tools, hand tools, or compressed air.

Grounding electrical equipment. Hazardous voltage can cause severe injury or death. Electrocution

is possible whenever electricity is present. Ensure you comply with all applicable codes and standards. Electrically ground the generator set, transfer switch, and related equipment and electrical circuits. Turn off the main circuit breakers of all power sources before servicing the equipment. Never contact electrical leads or appliances when standing in water or on wet ground because these conditions increase the risk of electrocution.

Disconnecting the electrical load. Hazardous voltage can cause severe injury or death. Disconnect

the generator set from the load by turning off the line circuit breaker or by disconnecting the generator set output leads from the transfer switch and heavily taping the ends of the leads. High voltage transferred to the load during testing may cause personal injury and equipment damage. Do not use the safeguard circuit breaker in place of the line circuit breaker. The safeguard circuit breaker does not disconnect the generator set from the load.

TP-6905 6/14 7Safety Precautions and Instructions

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Welding on the generator set. Can cause severe electrical equipment damage. Before welding on the

generator set perform the following steps: (1) Remove the battery cables, negative (--) lead first. (2) Disconnect all engine electronic control module (ECM) connectors. (3) Disconnect all generator set controller and voltage regulator circuit board connectors. (4) Disconnect the engine batterycharging alternator connections. (5) Attach the weld ground connection close to the weld location.

Connecting the battery and the battery charger. Hazardous voltage can cause severe injury or death.

Reconnect the battery correctly, positive to positive and negative to negative, to avoid electrical shock and damage to the battery charger and battery(ies). Have a qualified electrician install the battery(ies).

Short circuits. Hazardous voltage/current can cause severe injury or death. Short circuits can

cause bodily injury and/or equipment damage. Do not contact electrical connections with tools or jewelry while making adjustments or repairs. Remove all jewelry before servicing the equipment.

Engine oil pan heater. Hazardous voltage can cause severe injury or death. The engine oil pan heater can

cause electrical shock. Disconnect power to the engine oil pan heater and allow to cool before working on the oil pan heater electrical connections.

Electrical backfeed to the utility. Hazardous backfeed voltage can cause severe injury or death. Install

a transfer switch in standby power installations to prevent the connection of standby and other sources of power. Electrical backfeed into a utility electrical system can cause s evere injury or death to utility personnel working on power lines.

Servicing the generator set when it is operating. Exposed moving parts can cause severe injury or death.

Keep hands, feet, hair, clothing, and test leads away from the belts and pulleys when the generator set is running. Replace guards, screens, and covers before operating the generator set.

Hot Parts

WARNING

Hot coolant and steam. Can cause severe injury or death.

Before removing the pressure cap, stop the generator set and allow it to cool. Then loosen the pressure cap to relieve pressure.

WARNING

Hot engine and exhaust system. Can cause severe injury or death.

Do not work on the generator set until it cools.

Servicing the alternator. Hot parts can cause severe injury or death.

Avoid touching the alternator field or exciter armature. When shorted, the alternator field and exciter armature become hot enough to cause severe burns.

Servicing the exhaust system. Hot parts can cause severe injury or death. Do not touch hot engine parts.

The engine and exhaust system components become extremely hot during operation.

Servicing the engine oil pan heater. Heated components can cause severe injury. The oil pan heater will

rapidly become hot when energized. Do not touch the oil pan heater while it is hot. Disconnect power to the engine oil pan heater and allow to cool before servicing it or nearby parts.

Notice

NOTICE

Canadian installations only.For

standby service connect the output of the generator set to a suitably rated transfer switch in accordance with Canadian Electrical Code, Part 1.

NOTICE

Electrostatic discharge damage.

Electrostatic discharge (ESD) damages electronic circuit boards. Prevent electrostatic discharge damage by wearing an approved grounding wrist strap when handling electronic circuit boards or integrated circuits. An approved grounding wrist strap provides a high resistance (about 1 megohm), not a direct short,to ground.

TP-6905 6/148 Safety Precautions and Instructions

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Introduction

This manual provides operation instructions for Model 24RCL and 30RCLH residential/light commercial generator sets equipped with the RDC2 generator set/transfer switch controller.

This generator set is approved for use in stationary applications in locations served by a reliable utility power source. Have the generator set installed by an authorized Kohler distributor/dealer or service technician. Refer to the Installation Manual for installation instructions.

Information in this publication represents data available at the time of print. Kohler Co. reserves the right to change this publication and the p roducts represented without notice and without any obligation or liability whatsoever.

Read this manual and carefully follow all procedures and safety precautions to ensure proper equipment operation and to avoid bodily injury. Read and follow the Safety Precautions and Instructions section at the beginning of this manual. Keep this manual with the equipment for future reference.

The equipment maintenance requirements are very important for safe and efficient operation. Inspect the parts often and perform required maintenance at the prescribed intervals. Obtain service from an authorized Kohler distributor/ dealer or service technician to keep equipment in top condition.

Nameplate

Figure 2 shows a typical generator set nameplate. Copy the model, serial, and specification numbers from the nameplate into the spaces provided in the product information section on the inside front cover of this manual. See the service view in Section 1 for the nameplate location.

GM12070

Figure 2 Nameplate, Typical

GM91044--MA2

Figure 1 Model 24RCL Generator Set

TP-6905 6/14 9Introduction

Page 10

List of Related Literature

Figure 3 identifies related literature available for the generator sets covered in this manual. Only trained and qualified personnel should install or service the generator set.

Literature Type Part Number

Specification Sheet, 24RCL G4-228

Specification Sheet, 30RCLH G4-230

Installation Manual, Generator Set TP-6906

Operation Manual, KG2204 Engine TP-6901

Service Manual, Generator Set TP-6907

Service Manual, KG2204 Engine Mechanical

Service Manual, Engine ECM Diagnostics

Parts Catalog, KG2204 Engine TP-6904

Parts Catalog, 24RCL and 30RCLH Generator Set

Installation Instructions, Load Control Module (LCM)

Installation Instructions, Programmable Interface Module (PIM)

Operation Manual, OnCuet Plus Software

Operation/Installation Manual, RXT ATS TP-6807

Operation/Installation Manual, RDT ATS TP-6345

Installation Manual, RSB Transfer Switch TP-6486

Operation Manual, RSB Transfer Switch TP-6487

Figure 3 Related Literature

TP-6902

TP-6903

TP-6908

TT-1574

TT-1584

TP-6928

TP-6905 6/1410 Introduction

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Service Assistance

For professional advice on generator set power requirements and conscientious service, please contact your nearest authorized Kohler distributor or dealer.

D Consult the Yellow Pages under the heading

Generators—Electric.

D Visit the Kohler Power Systems website at

KohlerPower.com.

D Look at the labels and stickers on your Kohler product

or review the appropriate literature or documents included with the product.

D Call toll free in the US and Canada 1-800-544-2444.

D Outside the US and Canada, call the nearest regional

office.

Headquarters Europe, Middle East, Africa (EMEA)

Kohler Power Systems Netherlands B.V. Kristallaan 1 4761 ZC Zevenbergen The Netherlands Phone: (31) 168 331630 Fax: (31) 168 331631

Asia Pacific

Power Systems Asia Pacific Regional Office Singapore, Republic of Singapore Phone: (65) 6264-6422 Fax: (65) 6264-6455

China

North China Regional Office, Beijing Phone: (86) 10 6518 7950

(86) 10 6518 7951 (86) 10 6518 7952

Fax: (86) 10 6518 7955

East China Regional Office, Shanghai Phone: (86) 21 6288 0500 Fax: (86) 21 6288 0550

India, Bangladesh, Sri Lanka

India Regional Office Bangalore, India Phone: (91) 80 3366208

(91) 80 3366231

Fax: (91) 80 3315972

Japan, Korea

North Asia Regional Office Tokyo, Japan Phone: (813) 3440-4515 Fax: (813) 3440-2727

Latin America

Latin America Regional Office Lakeland, Florida, USA Phone: (863) 619-7568 Fax: (863) 701-7131

TP-6905 6/14 11Service Assistance

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Notes

TP-6905 6/1412 Service Assistance

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Section 1 Service Views

SERVICE SIDE

GM90230

ADV-8641

Cooling System Detail

NON-SERVICE SIDE

1. Oil check (dipstick)

2. Oil fill location (on valve cover)

3. See cooling system detail

4. Exhaust outlet

5. Enclosure locking tool (shipping location only)

6. Spark plugs

7. EPR (electronic fuel pressure regulator)

8. Engine ECM

9. Fuel inlet (1 in. NPT)

10. Fuel solenoid valves (qty. 2 shown)

11. Oil cooler adapter (model 30RCLH only)

12. Lube oil filter

13. Customer load lead access

14. Customer connection access panel

15. Line circuit breaker

16. Generator set master control buttons (on RDC2 controller)

17. Nameplate location

18. RDC2 controller

19. Fan fuses

20. Cooling air inlet (remove this panel to access coolant drain)

21. Access to coolant fill

22. Air-fuel mixer

23. Throttle body

24. Air cleaner

25. Battery

26. Oil Drain

27. Coolant drain

28. Oil cooler (model 30RCLH only)

29. Fans (qty. 3)

30. Radiator

31. Pressure cap (engine coolant fill)

32. Coolant overflow tube

33. Oil cooler hoses (model 30RCLH only)

34. Coolant overflow bottle

Figure 1-1 24RCL and 30RCLH Service Views for Maintenance

TP-6905 6/14 13Section 1 Service Views

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Notes

TP-6905 6/1414 Section 1 Service Views

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Section 2 Generator Set Operation

2.1 Operating Area

WARNING

Carbon monoxide. Can cause severe nausea, fainting, or death.

The exhaust system must be leakproof and routinely inspected.

Carbon monoxide symptoms. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide

is a poisonous gas present in exhaust gases. Carbon monoxide is an odorless, colorless, tasteless, nonirritating gas that can cause death if inhaled for even a short time. Carbon monoxide poisoning symptoms include but are not limited to the following:

D Light-headedness, dizziness D Physical fatigue, weakness in

joints and muscles

D Sleepiness, mental fatigue,

inability to concentrate or speak clearly, blurred vision

D Stomachache, vomiting, nausea If experiencing any of these symptoms and carbon monoxide poisoning is possible, seek fresh air immediately and remain active. Do not sit, lie down, or fall asleep. Alert others to the possibility of carbon monoxide poisoning. Seek medical attention if the condition of affected persons does not improve within minutes of breathing fresh air.

Generator set operation. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide is an

odorless, colorless, tasteless, nonirritating gas that can cause death if inhaled for even a short time. Avoid breathing exhaust fumes when working on or near the generator set. Never operate the generator set inside a building. Never operate the generator set where exhaust gas could seep inside or be drawn into a potentially occupied building through windows, air intake vents, or other openings.

Keep the generator set area clear. Maintain at least

0.9 m (3 ft.) of clearance on all sides of the generator set. Verify that there are no windows, air vents, or other openings in the building within 1.5 m (5 ft.) of the generator set exhaust outlet in any direction.

Notice

Do not locate patios, decks, play areas, or animal shelters near the generator set. Keep items such as lawn furniture, toys, sports equipment, and all combustible materials away from the generator set exhaust outlet. Remind family members, children, and visitors to use caution near the generator set.

Generator sets connected to automatic transfer switches start automatically during exercise periods and power outages. Some generator set components become hot when the generator set is running and remain hot for a time after the generator set shuts down.

2.2 Prestart Checklist

To ensure continued satisfactory operation perform the following checks or inspections before or at each startup, as designated, and at the intervals specified in the service schedule. In addition, some checks require verification after the unit starts.

Air Cleaner. Check for a clean and installed air cleaner element to prevent unfiltered air from entering the engine.

Air Inlets. Check for obstructions that could block the flow of cooling air. Keep the air intake area clean. Do not leave rags, tools, or debris on or near the generator set.

Battery. Check for tight battery connections. Consult the battery manufacturer’s instructions regarding battery care and maintenance.

Coolant Level. Check the coolant level according to the cooling system maintenance information.

Drive Belt. Check the belt condition of the water pump and battery charging alternator belt.

Carbon Monoxide Detectors. Check for the installation and operation of carbon monoxide (CO) detectors on each level of any building near the generator set.

Oil Level. Maintain the oil level at or near, not over, the full mark on the dipstick.

TP-6905 6/14 15Section 2 Generator Set Operation

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2.3 Exercising the Generator Set

2.4.5 Engine Cooldown

Operate the generator set without load every week or every other week for 20 minutes. Perform all of the prestart checks before starting the exercise procedure. See Section 2.5 for instructions to set the automatic exerciser.

2.4 Generator Set Operation

2.4.1 Local Starting and Stopping

Start: Press the RUN button to immediately start the

generator set.

Stop: Press the OFF button. The engine stops.

Run the generator set with no load for at least 2 minutes to ensure adequate engine cooldown.

2.4.2 Automatic Starting and Stopping

An automatic transfer switch monitors the utility power and signals the generator set to start when utility power is lost. The ATS then transfers the load to the generator set.

When utility power is restored, the transfer switch transfers the load back to utility, runs the generator set with no load to cool down the engine, and then stops the generator set engine. The electric fans continue to run for two minutes after the engine shuts down to evacuate the engine compartment.

The engine cooldown time delay allows the engine to run after the loads have been removed.

The engine cooldown time delay is set to 5 minutes. The engine stops before the cooldown time delay expires if the temperature drops below the cooled-down temperature level, or if the temperature rises above the high limit during the cooldown cycle.

The electric fans continue to run for two minutes after the engine shuts down to evacuate the engine compartment.

If a transfer switch other than the Model RXT is used, an additional engine cooldown time delay may be programmed on the transfer switch. To allow the smart engine cooldown on the RDC2 controller to operate most efficiently, set the cooldown time on the transfer switch controller to zero or the minimum time allowed. Refer to the instructions provided with the transfer switch for more information.

2.4.6 Automatic Operation with Model RXT Transfer Switch

The Model RXT transfer switch connects to the RDC2 controller through the ATS interface board on the transfer switch. Also see Section 2.7, Model RXT Transfer Switch Operation.

The RDC2 controller must be in AUTO mode for automatic transfer switch operation.

2.4.3 Remote Starting and Stopping

A remote switch connected to terminals 3 and 4 can be used to start and stop the generator set. Close the switch to start and run the generator set. Open the switch to stop the generator set.

Run the generator set with no load for at least 2 minutes to ensure adequate engine cooldown.

2.4.4 Engine Start Crank Cycle

The controller attempts to start the generator set three times (three crank cycles, 15 seconds crank and 15 seconds off). If the generator set does not start in three attempts, the system shuts down on an overcrank fault. See Section 2.6.

Pressing the OFF button during the crank cycle stops the cranking. No other buttons are acknowledged during the crank cycle.

Automatic Start

The RDC2 controller receives utility source voltage sensing data from the Model RXT transfer switch.

1. If the utility source voltage falls below an acceptable level, the controller starts the engine start time delay.

2. If the utility source is not restored before the time delay expires, the generator set starts.

3. After the Normal-to-Emergency time delay, the ATS is signaled to transfer the load to the emergency source.

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Automatic Stop

1. When the utility source is restored, the Emergency-to-Normal time delay starts.

If a Model RDT or RSB transfer switch is used, refer to the instructions provided with the transfer switch to set a loaded exercise at the ATS, if desired.

2. When the Emergency-to-Normal time delay expires, the load is transferred to the utility.

3. The generator set stops.

2.4.7 Automatic Operation with Model RDT or RSB Transfer Switches

If a Kohler Model RDT or RSB transfer switch is used, the engine start contacts from the ATS must be connected to engine start leads 3 and 4 on the generator set.

The RDC2 generator set controller must be in AUTO mode to respond to remote start/stop signals from an ATS or remote switch. Press the AUTO button on the RDC2 controller to put the generator set into automatic mode.

Automatic Start

The engine start contacts on the ATS close to signal the generator set to start, and remain closed while the generator set is running.

Automatic Stop

The engine start contacts on the ATS open to signal the generator set to stop.

2.5.1 Unload ed Cycle Exercise with Complete System Diagnostics

An unloaded cycle exercise runs the generator set without signalling the transfer switch to transfer the electrical load from the utility source to the generator set. The Unloaded Cycle exercise with diagnostics is the recommended exercise mode and is the factory-default exercise setting.

The Unloaded Cycle exercise runs the engine for 20 minutes in the cycle shown in Figure 2-1 and described below.

D Runs at reduced speed for 10 minutes to warm up

and exercise the engine.

D Ramps up and runs at full speed for 3 minutes.

Engine diagnostics are performed during this full-speed portion of the cycle, which provides the best test of engine and alternator power backup capability. Diagnostic tests at full speed can identify potential problems with the power output and alert the operator before an emergency event.

D Ramps down and runs at reduced speed for

5 minutes to cool down the engine before shutting down automatically.

2.5 Exercise

The RDC2 controller can be set to automatically run the generator set at the same time and day every week or every other week. Exercising the generator set every week or every two weeks is required in order to keep the engine and alternator in good operating condition.

Three exercise modes are available: unloaded cycle, unloaded full speed, and loaded full speed. See Sections 2.5.1 through 2.5.3 for information about the exercise modes. A loaded exercise can be set at the RDC2 controller only if a Model RXT transfer switch is connected.

Note: With the RDT and RSB transfer switches, it is

possible to have two exercise settings (one unloaded exercise set at the generator set controller, and another exercise set at the ATS controller). If the exercise times overlap, the ATS exercise setting takes priority.

3min.

1min.

Engine Speed, RPM

10 min. 5 min.

Engine

Exercise

Full-Speed

Diagnostics

1min.

Cooldown

Figure 2-1 Unloaded Exercise Cycle

System Diagnostics

During the unloaded cycle exercise, the controller monitors the following data. The controller display indicates an unloaded exercise run during the diagnostics, unless a fault is detected as described below.

TP-6905 6/14 17Section 2 Generator Set Operation

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D ATS connection. The controller verifies that the

Model RXT ATS interface board is connected.

D Battery 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.

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.

D Coolant 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.

D Engine 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.

2.5.2 Unloaded 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.

2.5.4 Shutdown 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.

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

2.5.6 Exerciser Reset

2.5.3 Loaded Full-Speed Exercise (with RXT only)

A loaded exercise starts the generator set, ramps u p 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

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.

2.5.7 Setting 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.

TP-6905 6/1418 Section 2 Generator Set Operation

Page 19

2. Press Select button to save the year and move to the month.

2. Press the Select button to go to the main menu. SeeFigure2-2.

3. Use the arrow and select buttons to set the month and the day.

4. The time is displayed with the hour flashing. Use the up or down arrow key to step to the current hour and am or pm setting.

Note: Check the am/pm setting displayed. If pm is

displayed and you need to change it to am, use the down arrow button to step down in time until the correct hour and am are displayed.

5. Press the Select button to save the hour and move to minutes.

6. Use the up or down arrow button to change the minutes.

7. Press Select to save the time and move to the next screen.

8. Next Exercise is displayed. Use the up, down, and select buttons to set the exercise time and date. Be sure to set a time and date in the future.

3. Press the down arrow button to step to the Genset System menu.

4. Press the Select button to enter the Genset system menu. See Figure 2-3.

5. Use the down arrow button to step to the next Exercise menu.

6. Press the Select button. The setting flashes to show that it can be changed. For example, the hour flashes to show that the hour can be changed.

7. Press the UP or Down arrow buttons to change the setting.

8. Press the Select button to save the setting and move to the next. For example, save the hour setting and move to minutes.

9. Repeat steps 5 through 8 to change the next item on the line until the desired settings are displayed.

10. Press Select to save after all settings have been selected. Settings will stop flashing.

9. Press Select. The controller exits the exercise menu.

10. Press the Auto button and verify that the AUTO LED is lit. The generator set must be in automatic mode for the exercise to run as scheduled.

Theexercisewillrunevery7daysatthesametime, starting on the date set. To change the exerciser to run every other week or on a different day and time, use the following procedure.

2.5.8 Changing the Exercise Setting

Set the date and time on the controller before setting the exercise schedule. Set the exerciser to automatically run the generator set for 20 minutes every week or every two weeks. Follow the procedure below and see the flowchart in Figure 2-3 to set the exercise time and date, mode, and frequency.

Procedure to Change the Exercise Setting

1. Press the AUTO button on the controller.

11. If the generator set is connected to a Kohlerr Model RXT transfer switch, the exercise can be changed to a loaded exercise. Set the Exercise Mode to loaded full speed, unloaded full speed, or unloaded cycle as shown in Figure 2-3.

12. Set the exercise frequency (weekly or every two weeks). Weekly exercises are recommended.

13. Press the down arrow button to step to the Return menu. Press the Select button to return to the main menu.

14. Check that the AUTO LED is lit. The generator set must be in automatic mode for the exercise to run as scheduled.

After a scheduled exercise run, the next exercise time and date will be updated automatically based on the Exercise Frequency setting.

Other transfer switches: 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.

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Status Displays

Overview ---->

1.2 h

Engine ----> Metering

Generator-- --> Metering

Genset ----> Information

Genset ----> Run Time

Genset ----> System

ATS -- - -> Status

ATS -- - -> Configuration

D a t e -- -- > and Time

Network -- --> Information

PIM -- --> Status

Load ----> Control

Event Log-- -->

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Figure 2-2 RDC2 Main Menu

TP-6905 6/1420 Section 2 Generator Set Operation

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Genset ---->

System

System Voltage:

240 V

System Freq:

60 Hz

VR Voltage Adj:

240.0V

System Phase:

Single

System Battery:

12 V

Next Exercise *

HR:MN PM MM/DD/YY

Exercise Mode:

Unloaded Cycle

Exercise Freq:

Weekly

Meas. System:

English

Next Exercise

HR:MN PM MM/DD/YY

Exercise Mode:

None/Unloaded Full Sp/ Unloaded Cycle/Loaded Full SP

Exercise Freq:

Weekly/Every Other Week

See Section 2.5.8, Changing the Exercise Setting

Contrast:

<-- -- Return

* If the exerciser has not been set, No Exercise Sch will be displayed.

Figure 2-3 Procedure to Set the Exerciser

TP-6905 6/14 21Section 2 Generator Set Operation

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2.6 Faults

2.6.3 ATS Communication Errors

Selected fault conditions are shown in Figure 2-5. Fault conditions are classified as warnings or shutdowns. If a fault occurs that is not listed in the table, contact an authorized distributor/dealer for service.

Note: All ECM faults are grouped under one listing in

Figure 2-5.

If a programmable interface module (PIM) is connected to the generator set controller, additional faults can be activated by customer-supplied equipment. See TT-1584, Installation Instructions for the Programmable Interface Module, for available inputs and outputs.

2.6.1 Warnings

The controller displays a fault message but the generator set does not shut down on a warning. The controller resets automatically after a warning condition is corrected.

2.6.2 Shutdowns

Under a fault shutdown condition, the generator set shuts down automatically and the controller displays a fault message. The OFF LED flashes. See Figure 2-5.

Shutdown switches (such as the low coolant level switch or high engine temperature switch) on the generator set will automatically reset when the problem is corrected. However, the fault condition at the controller does not clear until the controller is reset.

When a Model RXT transfer switch is used, an ATS fault indicates that the connection to the interface board on the transfer switch has been lost. Check the connection to the ATS interface board.

2.6.4 Resetting the Controller after a Fault Shutdown

Always identify and correct the cause of a fault shutdown before resetting the controller.Check the fault message displayed on the controller and refer to Figure 2-5 to identify and correct the fault condition before proceeding. Contact a n authorized distributor/dealer for service, if necessary.

Press the OFF button to reset the controller,or follow the procedure below. See Figure 2-4.

Procedure to Reset the Controller after a Fault Shutdown

1. Press the Select button to go to the Overview menu.

2. Press Select again. The active fault is displayed.

3. Press Select. Confirm Clear Fault: NO is displayed.

4. Press the Up arrow button. Confirm Clear Fault: YES is displayed.

5. Press the Select button to enter YES and clear the fault.

The generator set cannot be restarted until the fault condition is corrected and the controller is reset. See Section 2.6.4 to reset the controller after a fault shutdown.

Fault Message

Overview ---->

1.2 h

Figure 2-4 Clearing a Fault

6. Press the Select Button to return to the overview menu.

7. Press AUTO to put the generator set into automatic mode.

Fault Message Confirm Clear

Fault: NO

Press Up arrow button.

Confirm Clear Fault: YES

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TP-6905 6/1422 Section 2 Generator Set Operation

Page 23

Fault (RDC2)

AC Sens Loss

Warning (1 sec.)

Shutdwn (3 sec.)

Accy PwrOver Warning

Alt Protect Shutdwn

ATS ComError Warning

ATS PhaseRot Warning

Aux Input Shutdwn

Batt Chg Flt Warning

Battery CrLo Warning

Battery High Warning

Battery Low Warning

Chk DateTime Warning

Coolant Lvl Low Shutdwn

Fault (OnCuer

Condition Check

Plus)

AC Sensing Lost

AC Sensing Lost. In Auto mode, generator output AC sensing is lost. Detection begins 10 seconds after crank disconnect.

Warning: after 1 second if no output detected after crank disconnect.

Shutdown: after 3 seconds if voltage was present and then lost.

Accessory Power Overload

Accessory Power Overload. An over current fault (short circuit) on the accessory controller power output.

Alternator Protection

High generator current is detected. The generator set shuts down to protect the alternator from damage caused by overheating the windings. (30RCLH only)

ATS Communication Error

ATS Phase Rotation Mismatch

ATS Communication Error. Warning is displayed if RXT interface connection is lost. See Section 2.6.3.

ATS Phase Rotation Mismatch. Transfer switch phase rotation does not match. ATS will not transfer.

Auxiliary Input Auxiliary Input. An optional

customer-connected input is closed. (Digital input from optional PIM.)

Battery Charger Fault

Engine starting battery voltage rises above 150% (18 Volts) of the battery voltage setting for more than 10 seconds. Inhibited during the engine crank cycle.

Clears when the battery voltage returns to an acceptable level.

Critically Low Battery Voltage

Engine starting battery voltage falls below 11 V for more than 10 seconds. Inhibited during the engine crank cycle.

Clears when the battery voltage returns to an acceptable level.

High Battery Voltage

Engine starting battery voltage rises above 133% (16 V) of the battery voltage setting for more than 10 seconds. Inhibited during the engine crank cycle.

Clears when the battery voltage returns to an acceptable level.

Low Battery Voltage

Engine starting battery voltage falls below the battery voltage setting (typically 12.5 volts) for more than 90 seconds when the engine is not running. Inhibited during the engine crank cycle.

Clears when the battery voltage returns to an acceptable level.

Verify Date Time Setting

Low Coolant Level Shutdown

The time and date have not been set on the generator controller.

The coolant level switch input has been activated.

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances.

Check communication wiring between transfer switch interface board and generator set.

Correct the ATS connection. Refer to the ATS Installation manual, wiring diagrams, and labels on the transfer switch.

Check customer-supplied equipment.

Check external battery charger.

Check the battery rating and condition.

Check the battery charger operation.

Charge or replace the battery.

Check the battery rating and condition.

Check the battery charger operation.

Check the battery rating and condition.

Check the battery charger operation.

Charge or replace the battery.

Enter the date and time using the RDC2 controller. See Figure 3-8 and Figure 3-16.

Check coolant level.

Check radiator hoses for leaks.

Contact an authorized distributor/dealer for service.

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Fault (RDC2)

CoolTempHigh Warning

CoolTemp Vhi Shutdwn

Fault (OnCuer Plus)

Ect Higher Than Expected 1

Ect Higher Than Expected 2

Condition Check

Coolant temperature is too high. Check coolant level.

Check radiator and fans for obstruction.

Contact an authorized distributor/dealer for service and provide the fault code.

Coolant temperature is extremely high. Check coolant level.

Check radiator and fans for obstruction.

Contact an authorized distributor/dealer for service and provide the fault code.

CoolntTemp 0 Shutdwn

CoolntTemp 3 Shutdwn

CoolntTemp 4 Shutdwn

CoolntTemp 5 Shutdwn

Crank Lost Warning

Crank Noise Warning

“ECM” warnings (any warnings with ECM in the fault name)

Coolant Temp 0 Shutdown

Coolant Temp 3 Shutdown

Coolant Temp 4 Shutdown

Coolant Temp 5 Shutdown

Crank Signal Lost

Crank Sync Noise

“ECM” warnings (any warnings with ECM in the fault name)

The ECM reported a problem with the coolant temperature sensor reading: 0 = high temperature.

The ECM reported a problem with the coolant temperature sensor reading: 3 = high voltage.

The ECM reported a problem with the coolant temperature sensor reading: 4 = low voltage.

The ECM reported a problem with the coolant temperature sensor reading: 5 = open circuit.

Crankshaft Position Sensor (CPS) timeout error occurred.

Crankshaft Position Sensor (CPS) synchronization error occurred.

This group of faults includes a wide variety of faults that originate from the engine ECM and also contain ECM in the fault name.

Check coolant level.

Check radiator and fans for obstruction.

Contact an authorized distributor/dealer for service and provide the fault code.

Emerg Stop Shutdwn

Emergency Stop Shutdown

Eng Derate Engine Derate

Active

Eng Speed High Shutdwn

Eng Speed Low Shutdwn

Exer Not Sch Warning

High Engine Speed

Low Engine Speed

ATS Exercis e Not Scheduled

The emergency stop switch has been activated, or there has been an open circuit in the wiring.

The ECM reported a torque limiting error caused by coolant overheating.

Engine speed exceeds 115% of the normal running speed for more than 0.3 seconds.

Engine speed drops below 85% of the normal running speed for more than 3 seconds.

Exercise Not Scheduled. No exercise has been scheduled on the RDC2 controller.

Contact an authorized distributor/dealer for service.

Check coolant level.

Contact an authorized distributor/dealer for service and provide the fault code.

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances.

Contact an authorized distributor/dealer for service.

See Section 2.5 for instructions to set the exerciser.

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Page 25

Fault (RDC2)

Frequency High Shutdwn

Frequency Low Shutdwn

Genset S/N Unaval Warning

IAT High 1 Warning

IAT Volt Hi Warning

IAT Volt Lo Warning

Invalid Csum Warning

Fault (OnCuer

Condition Check

Plus)

High Frequency Governed frequency exceeds 110% of the

system’s frequency setpoint for more than 10 seconds. Function becomes active 10 seconds after engine start (10 second inhibit).

Low Frequency Governed frequency falls below 90% of the

system frequency setting for more than 10 seconds, or 1 Hz below the system frequency setting for more than 60 seconds.

Function becomes active 10 seconds after engine start (10 second inhibit).

Unavailable

Generator set serial number is unavailable. Contact an authorized Genset Serial Number

Iat Higher

Engine manifold air temperature is too high. Contact an authorized Than Expected 1

Iat High Voltage

The ECM reported an Engine Air

Temperature/Manifold Absolute Pressure

Sensor (TMAP) error.

Iat Low Voltage

The ECM reported an Engine Air

Temperature/Manifold Absolute Pressure

Sensor (TMAP) error.

Flash Csum

An ECM error occurred. Contact an authorized Invalid

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances and restart the generator set.

Contact an authorized distributor/dealer for service.

distributor/dealer for service. See section 3.11.

distributor/dealer for service and provide the fault code.

Contact an authorized distributor/dealer for service and provide the fault code.

distributor/dealer for service and provide the fault code.

Lo Crank Vlt Warning

Locked Rotor Shutdwn

MainPwrOverL Shutdwn

Maint Req’d Warning

Not in Auto Warning

Oil Pres Low Shutdwn

Low Cranking Voltage

Low cranking voltage. Battery voltage falls below 60% of system battery voltage for more than 6 seconds while the starter is engaged.

Locked Rotor No engine rotation is sensed during cranking.

Shuts down 3 seconds after the fault is detected.

Main Power Overload

Maintenance

Main power overload. An over current fault on the 70 controller power output (short circuit).

Engine maintenance is due. Check the maintenance schedule in Required Warning

Not In Auto The generator set is not in Automatic

(standby) mode. Remote start and stop

commands from a transfer switch or remote

switch will be ignored.

Low Oil Pressure

The engine ECM indicates low oil pressure.

Note: The low oil pressure shutdown does not

protect against low oil level. Check the engine

oil level regularly as recommended in

Section 4.

Charge or replace the battery.

Check the battery.

Check for loose connections.

Check for obstruction of alternator or engine.

Contact an authorized distributor/dealer for service.

Check for shorted run relay. Check wiring for short circuits.

Contact an authorized distributor/dealer for service.

the operation manual for tasks such as changing the oil, spark plugs or the air filter.

Press AUTO to place the generator set in Automatic mode, when appropriate.

Check for leaks in the lubrication system.

Check the oil level and add oil if the level is low.

Check the oil pressure switch and wiring.

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Fault (RDC2)

Over Crank Shutdwn

PrimLoopOpn Warning

PrimLoopSht Warning

RAM Failure Warning

Fault (OnCuer Plus)

Over Crank Three unsuccessful starting attempts. Check the fuel supply, spark plug,

Primary Loop Open

Primary Loop Shorted

Ram Failure An ECM memory error occurred. Contact an authorized

Condition Check

and battery.

Check for loose connections.

Contact an authorized distributor/dealer for service.

Ignition coil 1 voltage is below normal or there is an open circuit.

Ignition coil 1 voltage is abnormal. Check the battery voltage.

Check the battery voltage.

Contact an authorized distributor/dealer for service and provide the fault code.

distributor/dealer for service and provide the fault code.

RunRelCoil Shutdwn

Spd Sens Flt Shutdwn

Total Power High Shutdwn

Volts L1-L2 High Shutdwn

Volts L1-L2 Low Shutdwn

Volts L2-L3 High Shutdwn

Volts L2-L3 Low Shutdwn

Volts L3-L1 High Shutdwn

Volts L3-L1 Low Shutdwn

Run Relay Coil Overload

Speed Sensor Fault

Total Power High Shutdown

High Generator Voltage L1-L2

Low Generator Voltage L1-L2

High Generator Voltage L2-L3

Low Generator Voltage L2-L3

High Generator Voltage L3-L1

Low Generator Voltage L3-L1

Excessive current on the run (70) line. Check for shorted relays or shorted

Engine speed sensor has failed or engine

stalled. ECM is no longer reporting valid

speed.

Measured load is greater than 102% of the

generator set power rating for more than 1

minute. (30RCLH only)

Generator Voltage High. Output voltage

exceeds 120% of the system nominal voltage

for more than 2 seconds.

Generator Voltage Low. Output voltage falls

below 80% of the nominal system voltage for

more than 10 seconds.

Generator Voltage High. Output voltage

exceeds 120% of the system nominal voltage

for more than 2 seconds.

Generator Voltage Low. Output voltage falls

below 80% of the nominal system voltage for

more than 10 seconds.

Generator Voltage High. Output voltage

exceeds 120% of the system nominal voltage

for more than 2 seconds.

Generator Voltage Low. Output voltage falls

below 80% of the nominal system voltage for

more than 10 seconds.

wires.

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances.

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances and restart the generator set.

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances and restart the generator set.

Contact an authorized distributor/dealer for service.

Reduce the load by turning off appliances and restart the generator set.

Contact an authorized distributor/dealer for service.

Figure 2-5 Controller Fault Messages

TP-6905 6/1426 Section 2 Generator Set Operation

Page 27

2.6.5 Event Log

The event log displays up to 1000 controller faults and notices, starting with the most recent event. Events are numbered 1--1000, with 1 being the most recent. Each event is displayed with the date and time of the event, the number of the event, a code to indicate whether the event was a warning ( W ), shutdown (S), or informational notice (I), the engine hours at the time of the event, and the event description.

2.7 Model RXT Transfer Switch Operation

The RDC2 generator set/transfer switch controller manages automatic transfer switch (ATS) functions when connected to a Kohlerr Model RXT transfer switch through the ATS interface board. Refer to the Model RXT Operation/Installation Manual for information about the transfer switch operation.

Procedure to View Event History

1. Press Select to enter the main menu.

2. Press the down arrow to step down to the event log.

3. Press Select to display the most recent event.

4. Press the down arrow to step to the next event.

5. Use the up and down arrow buttons to view events.

6. Press the Select button to exit the event log.

To stop viewing the event history before the last event, press the select button to return to the main menu.

Date MO/DA/YEAR

Event Log ---->

Press UP and Down arrow buttons to scroll through events

time HR:MN

event number, W/S/I, engine hours

event name

2.7.1 Source Availability

The Model RXT transfer switch supplies voltage sensing data to the RDC2 controller through the ATS interface board. If the source voltage falls below the undervoltage dropout setting, the source is considered to have failed. See Figure 2-7.

Item Setting

Accuracy ±5%

Undervoltage Dropout 90% of Pickup

Undervoltage Pickup 90% of Nominal

Figure 2-7 Voltage Sensing Parameters

The RDC2 controller also has a set of power system LEDs below the pushbuttons. The power system LEDs indicate which power sources are available and which source is supplying power to the building. See Figure 3-1.

Note: The power system LEDs operate only if a Model

RXT transfer switch is connected. They will not operate if a Model RDT or RSB transfer switch is used.

Date MO/DA/YEAR

time HR:MN

event number, W/S/I, engine hours

event name

Press Select button at any time to return to the main menu.

Event codes:

W=Warning S = Shutdown I = Informational Notice

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Figure 2-6 Event Log

TP-6905 6/14 27Section 2 Generator Set Operation

Page 28

2.7.2 ATS Control Sequence of Operation

See Figure 2-8 for time delay settings.

Normal Source Fails:

1. The load control contact opens.

2. The engine start time delay times out.

2.7.3 Time Delays

Time delays are factory-set to the values shown in Figure 2-8. An authorized distributor/dealer can adjust time delays using a personal computer and Kohlerr SiteTecht software.

Time delays described in this section operate only when the controller is connected to a Kohlerr Model RXT transfer switch.

3. The generator set is signaled to start.

The engine start and load transfer time delays prevent engine start and load transfer caused by brief variations

4. The generator starts and the emergency source

in the utility power source.

becomes available.

5. The normal-to-emergency time delay times out.

2.7.4 ATS Load Control Relay Time Delay

6. The transfer switch transfers to the emergency source.

7. The load control contact time delay times out.

8. The load control contact closes.

Normal Source Returns:

1. The emergency-to-normal time delay times out.

2. The contactor transfers to the normal source.

3. The engine cooldown time delay times out.

4. The generator is signaled to stop.

Time Delay Setting Description

Engine Start 3 seconds Time delay after utility source is lost until the engine start cycle begins.

Guards against starting the generator set because of a brief change in the utility source.

Transfer, Normal to Emergency 3 seconds Time delay after emergency source becomes available until transfer to

emergency source.

Transfer, Emergency to Normal 2 minutes Time delay after the utility source returns until transfer back to normal.

Ensures that the the utility source is stable before transferring from the emergency source.

Load Control 5 minutes See Section 2.7.4. Allows delayed connection of selected loads to the

generator set to prevent simultaneous starting of large motors after transfer to the emergency source. Recommended for delayed starting of air conditioners.

The load control time delay allows delayed starting of large motor loads (such as air conditioners), preventing simultaneous starting of large motors after transfer to the generator set. The load control time delay is fixed at 5 minutes. It is not adjustable.

The load must be connected to the load control output on the interface board of the Model RXT transfer switch. See the transfer switch operation and installation manual for connection instructions.

Figure 2-8 Time Delays

TP-6905 6/1428 Section 2 Generator Set Operation

Page 29

Section 3 RDC2 Controller Operation

3.1 RDC2 Generator Set/Transfer Switch Controller

Model 24RCL and 30RCLH generator sets are equipped with the RDC2 generator set/transfer switch controller. The RDC2 controls the following power system components:

D Model 24RCL or 30RCLH generator set

D Model RXT automatic transfer switch (ATS)

D Load control module (LCM) or load shed kit

D Programmable interface module (PIM)

RDC2 Controller features include:

D Two-line x 16 character backlit LCD display with

adjustable contrast

D OFF, AUTO, and RUN generator set master control

buttons

D Generator set status indicating LEDs (OFF, AUTO,

RUN)

D Up, Down, and Select buttons for navigation through

menus and adjustments

1. 2-line LCD display

2. Up button

3. Select button

4. Down button

5. RUN button and LED

6. Generator power available LED *

7. Generator supplying power to the building LED *

8. Utility supplying power to the building LED *

9. Utility power available LED *

10. OFF button and LED

11. AUTO button and LED

* These LEDs operate only if a Model RXT transfer switch is

connected.

6789

GM77569

D Power system indicator LEDs to show utility and

generator source status, and to show which source (utility or generator) is supplying power to the building

3.2 Controls and Indicators

Figure 3-1 illustrates the keypad, display, and indicators on the controller’s user interface.

Figure 3-1 RDC2 User Interface

TP-6905 6/14 29Section 3 RDC2 Controller Operation

Page 30

3.2.1 Controller Keypad

3.2.2 LED Indicators

The Run, Off, and Auto buttons control the generator set as described in Figure 3-2. Use the Select, Up arrow,

LEDs above the RUN, OFF, and AUTO buttons indicate

the mode of operation as shown in Figure 3-2. and Down arrow buttons to navigate through the menus and change settings, if necessary. See Section 2.4 for operation instructions.

The RDC2 controller also has a set of power system

LEDs below the pushbuttons. The power system LEDs

indicate which power sources are available and which

source is supplying power to the building (based on the

position of the Model RXT transfer switch). See

Figure 3-1.

Note: The power system LEDs operate only if a Model

RXT transfer switch is connected. They will not operate if a Model RDT or RSB transfer switch is used.

Button Button Function

RUN Starts the generator set. The engine start time delay is ignored.

OFF Stops the generator set. The cooldown time delay is ignored.

During the engine crank cycle, pressing OFF will stop the crank cycle.

Press OFF to clear faults and reset the controller.

AUTO Places the generator set in Automatic (standby) mode.

Down arrow

Select

Up arrow

Use to navigate through menus and change settings. This manual contains instructions to navigate the controller menus and adjust settings on the RDC2 controller.

Figure 3-2 Pushbutton Operation

LED LED Operation

RUN Lights when the generator set has been started locally by pressing the RUN button.

OFF

AUTO Lights when the generator is in automatic (standby) mode. Generator set will respond to

Utility Power Available * Lights when utility power is available.

Building on Utility Power * Lights when the building load is connected to utility power through the RXT transfer

Generator Power Available * Lights when generator power is available.

Building on Generator Power * Lights when the building load is connected to generator power through the RXT transfer

* These LEDs operate only if a Model RXT transfer switch is connected.

Remote start and stop commands are ignored.

Lights for 2 seconds, then flashes every 2 seconds when the generator set and controller are off. Remote start/stop commands have no effect. The exercise cycle will not run.

In Auto mode, OFF LED flashes quickly to indicate a fault shutdown. Attention required. Identify and correct the fault condition before resetting the controller.

engine start and stop commands from the controller (for example, exercise start and stop commands), an ATS, or OnCuerPlus, Time delays operate as described in Section

2.4.

switch.

Figure 3-3 RDC2 Controller LED Operation

TP-6905 6/1430 Section 3 RDC2 Controller Operation

Page 31

3.2.3 LCD Display

The controller is equipped with a two-line x 16 character backlit liquid crystal diode (LCD) display with adjustable contrast. When the generator is running, the controller automatically scrolls through the displays shown in Figure 3-4. When the system is in AUTO, the LCD display scrolls through the status messages shown in Figure 3-5.

When a fault or warning condition exists, the controller will show the corresponding message. See Section 2.6 for more information on fault and warning messages.

Controller menus display power system information, including status information for the engine, generator, and optional RBUS accessories, exercise settings, and event history. Some menus allow changes to the controller settings. See Sections 3.6 through 3.19 for menu diagrams.

Active Alert

The display contrast is adjustable. Navigate to the

Genset System menu and step down to the Contrast

screen. Press the Select button, and then use the up and

down arrow buttons to adjust the contrast. See Section

3.5, Changing Settings, and Section 3.11, Generator

Set System Menu.

The display backlight turns off after about a minute of no

activity. T he backlight turns on when a button is pressed

or when the generator set starts.

Genset Status Standby

Battery

12.3V

Engine Runtime:

27.4 h

Genset Status Running

Voltage: 240V Freq: 60.0Hz

Engine: 123F Oil Pressure: 40 psi

Battery

12.3V

Engine Runtime:

27.4 h

Date: 02DEC2014 Time: HR:MNpm

Next Exercise: 09:00p 09Dec2014

Next Maintenance: 150 h or Mar2015

Sample data shown.

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Figure 3-5 Autopaging Displays, Automatic Mode

Sample data shown.

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Figure 3-4 Autopaging Displays, Generator Running

TP-6905 6/14 31Section 3 RDC2 Controller Operation

Page 32

3.3 Controller Power

The RDC2 controller is powered by the generator set engine starting battery and the built-in battery charger.

Note: To disconnect controller power, disconnect the

battery and the utility power to the generator set.

If controller power is disconnected and reconnected, you will be prompted to set the time, date, and exerciser. The first setting will flash. Press the Up and Down arrow buttons to change the setting. Press Select to save the setting and move on to the next. Repeat until all settings are saved and the controller returns to the main menu. See Section 3.5 for more detailed instructions to change settings on the RDC2. See Section 2.5 for more detailed instructions to set the exerciser or change the exercise settings.

The following procedure explains how to change

settings. See Figure 3-6 for an example using the Date

and Time settings.

Note: Use caution when navigating the controller

menus and changing the settings. In some menus, pressing the Select button can enable editing of the controller settings. Changing some settings to incorrect values can adversely affect generator set operation or render the unit inoperable.

Procedure to Change Settings

1. Press the Select button to enter the main menu.

2. Press the down arrow button until the desired menu is displayed. The Date and Time menu is used for the example in Figure 3-6.

3.4 Battery Charging

The controller includes a built-in battery charger to maintain the engine starting battery. The RDC2 controller monitors the battery voltage and provides a constant 14 ±2% VDC voltage and maximum 2.5 amps to charge the battery.

The installer must connect utility power provided from the building (90--265 VAC, 50/60 Hz) on a breaker-protected circuit for the built-in battery charger. See the Installation Manual for instructions to connect the utility power for the battery charger.

3.5 Changing Settings

Some settings can be changed from the controller keypad. The controller settings and generator set output are factory-set and should not require field adjustment under normal circumstances. Check and adjust the settings and/or output when:

D The controller has been replaced.

D The voltage requires adjustment for a particular

application.

D Troubleshooting generator set problems.

Have controller setup and adjustment performed only by an authorized Kohler distributor/dealer or authorized representative.

3. Press the Select button to enter the selected menu. SeeFigure3-6.

4. Press the down arrow button to step through the parameters in the selected menu.

5. To change a setting, press the Select button. The selected setting flashes.

6. Press the up or down arrow buttons to increase or decrease the setting.

7. When the desired setting is shown, press Select. The value stops flashing. If there are additional adjustable settings on the screen, the next setting flashes. For example, in the date menu, the year, month, and day can be adjusted.

8. Repeat steps 5 through 7 for each setting on the screen.

9. Press the down arrow to step to the next screen.

10. To exit, press the down arrow button until Return is displayed. Press the Select button to exit the menu.

11. Press the AUTO or OFF button to exit the main menu.

Note: If no buttons are pushed, the controller exits the

menus and returns to the generator set status display after 5 minutes.

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Page 33

Changing Settings on the RDC2 Controller

1. Press the Select button to enter the main menu.

Press: Display:

Overview ---->

1.2 h

2. Press the down arrow button until the desired menu is displayed. See Figure 3-7. Date and Time are used for this example.

Press:

Display:

D a t e -- -- >

and Time

3. Press the Select button to enter the Date and Time menu.

Press: Display:

Date:

05Dec2013

4. To change the date and time settings, press the Select button again. The year will flash.

8. When the correct date is shown, press the Select button. The saved date is shown.

Press: Display:

Date:

03Jan2014

9. Press the down arrow button to step to the next menu.

Press: Display:

Time:

01:49pm

10. Repeat steps 5 and 6, using the arrow and select buttons to set and save the time.

Note: To change from am to pm, press the up arrow

key to increase the hour until the correct hour and pm is displayed.

11. Repeat to set the time format to 12 hr. or 24 hr.

12. Press the down arrow button. Return is displayed.

Press: Display:

Date:

05Dec2013

5. Press the up or down arrow buttons to change the year.

Press:

Display:

Date:

05Dec2014

6. When the correct year is shown, press the Select button. The year is saved and the next setting (month) flashes.

Press: Display:

Date:

05Dec2014

7. Repeat steps 5 and 6, using the arrow and select buttons to set the month and the date.

Press: Display:

<-- -- Return

13. Press Select to return to the Date and Time menu.

Press: Display:

Date ---->

and Time

14. Press the Up or Down arrow buttons to step to a different menu.

15. Press Auto to signal the controller to exit the menus and return to the generator set status display.

Press:

Display:

AUTO

Genset State

Standby

Note: If no buttons are pressed, the controller returns

to the status display after 5 minutes.

Figure 3-6 Changing Settings

TP-6905 6/14 33Section 3 RDC2 Controller Operation

Page 34

3.6 Controller Menus

3.7 Main Menu

The following sections show the RDC2 controller menus and submenus. Use the Select button and the up and down arrow buttons to navigate the menus as shown in the diagrams.

Note: Use caution when navigating the controller

menus. In some menus, pressing the Select button can enable editing of the controller settings. Changing the settings to incorrect values can adversely affect generator set operation or render the unit inoperable.

If a setting on the controller display is flashing, edit mode has been enabled. Press the OFF or AUTO button to exit the edit mode.

Status Displays

Press the Up and Down arrow buttons to move between menus. Press OFF or AUTO to exit the menus.

Overview ---->

1.2 h

Engine ----> Metering

Press the Select button once to bring up the main menu. Overview is displayed. See Figure 3-7. Press the down arrow button to step to the next menu, Engine Metering. Use the UP and DOWN arrow buttons to step up and down through the menus shown in Figure 3-7.

The controller will exit the main menu after 5 minutes if no buttons are pressed. To exit the main menu immediately, press the controller’s OFF or AUTO button.

ATS -- - -> Configuration *

Generator-- --> Metering

Genset ----> Information

Genset ----> Run Time

Genset ----> System

ATS -- - -> Status

* ATS configuration appears only if a Model RXT transfer switch is connected.

D a t e -- -- > and Time

Network -- --> Information

PIM -- --> Status

Load ----> Control

Event Log-- -->

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Figure 3-7 RDC2 Main Menu

TP-6905 6/1434 Section 3 RDC2 Controller Operation

Page 35

3.8 Overview Menu

Overview ---->

1.2 h

Active Alert (if any)

3.9 Engine Metering Menu

The engine metering menu displays engine status information as shown in Figure 3-9. This menu displays status information only. No settings can be changed from this menu.

Genset Status Standby

Voltage: 240V Freq: 60.0Hz

Engine: 95F Oil: 40 PSI

Battery

12.3V

Engine Runtime:

27.4 h

Date: 02DEC2014 Time: HR:MNpm

Engine ---->

Metering

Eng Speed: 1800 RPM

Oil Pressure:

Coolant Temp:

Oil Temp:

Battery:

<---- Return

Figure 3-9 Engine Metering Menu

40 PSI

73 F

12.3 V

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Next Exercise: 09:00p 09Dec2014

Next Maintenance: 150 h or Mar2015

SW Version:

4.03

<-- -- Return

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Figure 3-8 Overview Menu

TP-6905 6/14 35Section 3 RDC2 Controller Operation

Page 36

3.10 Generator Metering Menu

Voltage Calibration

The generator metering menu displays the generator voltage and frequency. See Figure 3-10.

The voltage calibration mode can be entered from the generator metering menu.

Generator ---->

Metering

DANGER

Hazardous voltage. Will cause severe injury or death.

This equipment must be installed and serviced by qualified electrical personnel.

The voltage calibration mode can be entered from the Generator Metering menu. Contact a Kohler-authorized distributor/dealer for service.

The Reset Calibration menu allows you to set the voltage reading back to the original value after calibration, if necessary. See Figure 3-10.

Three-phase

Volts L1--L2:

Volts L2--L3:

Volts L3--L1:

Frequency:

240 V

60.0 Hz

Volts:

Frequency:

Reset

Calibration

<---- Return

Single-phase

240 V

60.0 Hz

Reset Calib? No

Reset Calib? Yes

Figure 3-10 Generator Metering Menu

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TP-6905 6/1436 Section 3 RDC2 Controller Operation

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3.11 Generator Set Information Menu

The generator set model number and serial numbers are displayed. No changes are allowed from this menu.

Model and serial numbers are factory set and should not require changes in the field, except in the event that the controller is being replaced. A personal computer running Kohlerr SiteTecht software is required to enter the generator set model number and serial numbers on a replacement controller. Contact an authorized Kohler distributor/dealer for service.

Genset ----> Information

Genset M/N:

24RCL

3.12 Genset Run Time Menu

The data shown in Figure 3-12 are displayed. No changes are allowed from this menu.

The Next Maintenance menu shows the number of hours of generator set operation until maintenance is required. The estimated date for the next scheduled maintenance is also displayed. The maintenance reminder intervals are based on the engine manufacturer’s recommendation for changing the oil. Refer to Section 4, Scheduled Maintenance, for maintenance instructions.

After changing the oil and performing other recommended maintenance, go to the Overview menu to reset the maintenance timer. See Section 4.3.4 for instructions to reset the maintenance timer.

Genset S/N:

########

Controller S/N:

########

<---- Return

Figure 3-11 Generator Set Information Menu

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Genset ----> Run Time

Eng Runtime:

27.4 h

Eng Starts:

Next Maintenance: 150 h or Mar2014

<---- Return

Figure 3-12 Generator Set Run Time Menu

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TP-6905 6/14 37Section 3 RDC2 Controller Operation

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3.13 Genset System Menu

The genset system menu displays the system information shown in Figure 3-13. Generator sets are factory set and should not require changes to the system settings in the field.

A Kohler authorized distributor or dealer can adjust these settings, if necessary. If the generator set is reconnected to a different voltage or the system settings require adjustment for some other reason, see Section

3.5 for instructions to enable editing and change the

system settings.

Note: Use caution when navigating the controller

Voltage Regulator (VR) Voltage Adjust

The generator set voltage is factory set and typically does not require adjustment in the field. If voltage adjustment is required, contact a Kohler authorized distributor or dealer for service. Refer to the generator set Installation Manual for instructions to adjust the voltage.

Setting the Exerciser

Genset ---->

System

System Voltage:

240 V

System Freq:

60 Hz

VR Voltage Adj:

240.0V

System Phase:

Three-Delta

System Battery:

12 V

Next Exercise

06:30p 15Dec2014

Exercise Mode:

Unloaded Cycle

Use the Genset System menus to set the generator set exerciser. Refer to Section 2.5 for instructions to set the exerciser and for more information about exercising the generator set.

After a scheduled exercise run, the Next Exercise time and date will be updated automatically based on the Exercise Frequency setting.

Adjusting the Display Contrast

To adjust the display contrast, use the down arrow button to step to the Contrast menu. Press the Select button, and then use the up and down arrow buttons to adjust the contrast. Press the Select button to save the contrast setting.

Exercise Freq:

Weekly

Meas System:

English

Contrast:

<-- -- Return

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Figure 3-13 Genset System Menu

TP-6905 6/1438 Section 3 RDC2 Controller Operation

Page 39

3.14 ATS Status Menu

ATS menus appear if a Model RXT transfer switch is connected to the generator set. If no transfer switch is connected, or another model ATS is connected to the engine start connections, Remote ATS is displayed on the ATS Status screen.

The ATS Status menu displays Model RXT transfer switch and source information.

The voltage shown in these menus can be calibrated. Contact an authorized distributor or dealer for service if calibration is required.

ATS --- -> Status

ATS Position: Normal

Normal Status: Not/Acceptable

Emerg. Status: Standby

Single-phase

Voltage:

Frequency:

240V

60.0 Hz

Note: If there is no Model RXT transfer

switch connected to the generator set, Remote ATS is displayed and the other screens on this page do not appear.

Three-phase

Voltage L1--L2:

240 V

Voltage L2--L3:

240 V

Voltage L3--L1:

240 V

Frequency:

60.0 Hz

Reset

Calibration

<---- Return

Reset Calib? No

Reset Calib? Yes

Figure 3-14 ATS Status Menu, with Calibration

TP-6905 6/14 39Section 3 RDC2 Controller Operation

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Page 40

3.15 ATS Configuration Menu

Note: The ATS Configuration menu appears only if a

Model RXT transfer switch is connected.

Use the ATSConfiguration submenu to check the Model RXT transfer switch system settings and time delays, and change the settings, if necessary.

Changing ATS Configuration Settings

To enable editing, press the select button. The value flashes to indicate that it can be changed. Press the up and down arrow buttons to change the value. Press the Select button to save the value shown.

Use the up and down arrow buttons to move to the next value to be changed. Repeat the adjustment process until all values are correct.

Press the down arrow until Return is displayed. Press the select button to return to the main menu.

ATS --- ->

Configuration

Normal Freq:

60.0 Hz

Normal Voltage:

240.0 V

Emerg. Freq:

60.0 Hz

Emerg. Voltage:

240.0 V

Emerg. Engine Start: 3 sec

Transfer From Normal: 3 sec

Transfer From Emerg.: 120 sec

<---- Return

Figure 3-15 ATS Configuration Menu

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TP-6905 6/1440 Section 3 RDC2 Controller Operation

Page 41

3.16 Date and Time Menu

The date and time will typically be set at controller power-up. To change the date, time, or time format (12 hour or 24 hour), use the Date and Time menu. See Figure 3-16.

Date and Time

To change the date and time, press the Select button See Figure 3-6 for instructions.

Date:

02Dec2014

Time:

12:34pm

Time Format:

12hr|24hr

<-- -- Return

Figure 3-16 Date and Time Menu

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TP-6905 6/14 41Section 3 RDC2 Controller Operation

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3.17 Networking Information Menus

Use the networking menus to view and adjust communication settings for systems with remote RBUS devices such as a PIM or LCM, and for systems that use the Kohlerr OnCuer Plus Generator Management

System. RBUS is a proprietary RS-485 communication protocol.

The Networking Information menu leads to submenus for network and RBUS communication settings.

Networking-- --> Information

Networking-- --> Status

Networking-- --> Configuration

RBUS -- --> Information

<---- Return

Figure 3-17 Networking Information Menu

See Figure 3-18.

See Figure 3-19.

See Figure 3-20.

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TP-6905 6/1442 Section 3 RDC2 Controller Operation

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3.17.1 Netwo rking Status Sub m enu

The Networking Status submenu contains settings for OnCuer Plus. See the OnCue Plus Software Operation Manual for information about the appropriate network settings for OnCue Plus.

If DHCP is enabled, IP parameters are not displayed. If DHCP is disabled (i.e., if a static IP address is used), the IP parameters are displayed.

To enable or disable DHCP and change the IP settings, go to the Networking Configuration menu. See Section 3.17.2.

Networking-- --> Information

Networking-- -->

Status

OnCue Status: Connected

DHCP:

Enabled

IP Address:

###.###.###.###

Subnet Mask:

###.###.###.###

Gateway:

###.###.###.###

DNS 1: ###.###.###.###

Figure 3-18 Network Status Submenu

DNS 2:

###.###.###.###

Ethernet Status:

Disconnected

OnCue Server:

###.###.###.###

<---- Return

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TP-6905 6/14 43Section 3 RDC2 Controller Operation

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3.17.2 Networking Configuration

Submenu (OnCue Plus Password)

The networking Configuration menu includes settings used for communication with the Kohlerr OnCuer Plus Generator Management System.

OnCue Plus Password

For the initial OnCue Plus setup, you will be required to reset the OnCue Plus password on the RDC2 controller, and then enter it into the OnCue Plus software. To reset the password, follow the instructions in Figure 3-19.

For most applications, DHCP is enabled and the IP settings cannot be changed from the controller keypad. If DHCP is enabled, IP parameters are not displayed.

If DHCP is disabled (i.e., if a static IP address is required), then the IP parameters can be modified. For applications that require static IP addresses, press and hold the select button to enable editing, disable DHCP, and then step to the next parameters and enter the information.

If an error occurs while setting a parameter, an error message is displayed and then the controller exits the edit mode. Previous settings are preserved.

Networking-- -->

Information

Networking-- --> Status

Networking Configuration

Reset OnCue Password

Note: The password is displayed for only 10 seconds.

Be sure to write down the password and serial number.

A new password is generated each time the reset password procedure is performed. If the password is reset after the OnCue Plus system has been set up, the connection will be lost. Enter the new password in OnCue Plus to reconnect.

HOLD

Reset OnCue Password? No

UP arrow for YES, Down arrow for NO.

Figure 3-19 Network Configuration Submenu

DHCP: Enabled

<---- Return

Reset OnCue Password? Yes

Press Select to enter YES or NO as displayed. New password is displayed for approximately 10 seconds.

S/N: ####### New PW: #####

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Page 45

3.17.3 RBUS Information Submenu

D Model RXT transfer switch

The RBUS Information menu contains settings for remote modules that communicate with the RDC2 controller using RBUS protocol. This includes the following optional modules:

Networking-- -->

Information

Networking-- -->

Status

Networking-- -->

Configuration

RBUS -- --> Information

<---- Return

D Programmable Interface Module (PIM)

D Load Control Module (LCM)

Modules Connected: 3

R e m o t e -- -- > Devices

See Figure 3-21.

Net Cycle Time: 123ms

Figure 3-20 RBUS Information Submenu

Module Timeouts: ####

Module Errors: ####

< ---- Return

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TP-6905 6/14 45Section 3 RDC2 Controller Operation

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3.17.4 Remote Devices Submenu

Check the status of remote devices communicating through RBUS. Device types can include:

D Model RXT ATS

D Programmable interface module (PIM)

D Load control module (LCM)

S/N: ######### <<*DeviceType*>>

Device Status: Connected

Comm. Errors: #####

Comm. Timeouts: #####

ModBus ID: ##

Firmware Ver.: ###

Connected: MM/DD/YY 12:12

S/N: ######### <<*DeviceType*>>

Connected: Displays date/time device was connected. Disconnected: Displays date/time of the last successful

communication.

...

<---- Return

R e t u r n -- -- >

Figure 3-21 Remote Devices Submenu

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TP-6905 6/1446 Section 3 RDC2 Controller Operation

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3.18 Programmable Interface Module (PIM) Menus

The PIM status menu displays the status of inputs and outputs connected to the programmable interface module (PIM). This is a status display menu only. Input and output settings cannot be changed from the RDC2 controller’s user interface.

A personal computer running Kohlerr SiteTecht software is required to change the input and output settings. Contact an authorized distributor or dealer for service.

The Kohlerr OnCuer Plus Management System can be used to turn outputs on and off. See the OnCue Plus Software Operation Manual for instructions.

PIM Status:

P I M 1 -- -- >

<---- Return

Input 1 In/Active

Input 2 In/Active

Output 1: In/Active

Output 2: In/Active

Output 3: In/Active

Output 4: In/Active

Output 5: In/Active

Output 6: In/Active

<---- Return

Figure 3-22 Programmable Interface Module (PIM) Status Menu

TP-6905 6/14 47Section 3 RDC2 Controller Operation

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Page 48

3.19 Load Control Menus

The generator set may be connected to a Load Control Module (LCM) or a Model RXT transfer switch equipped with a Load Shed kit. The Load Control menu displays the status of the load control inputs and outputs, and allows a test of the load control output relays.

Generator current is displayed as a percent of the maximum generator capacity. The load control module adds and sheds loads based on the generator current.

The test function cycles the relays in the order of their priority.

For detailed information about load control operation, refer to TT-1574, provided with the LCM kit, or TT-1609, provided with the Load Shed kit.

Load ----> Control

Generator Current: 123 %

Load ----> Control 1

<---- Return

Test Outputs Push Select (blinking)

Input 1: In/Active

Input 2: In/Active

Output 1: Add/Shed

Output 2: Add/Shed

Output 3: Add/Shed

Output 4: Add/Shed

Figure 3-23 Load Control Status Menu

Output 5: Add/Shed

Output 6: Add/Shed

<---- Return

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Section 4 Scheduled Maintenance

4.1 General Maintenance

WARNING

Accidental starting. Can cause severe injury or death.

Disabling the generator set. Accidental starting can cause severe injury or death. Before working on the

generator set or connected equipment, disable the generator set as follows: (1) Move the generator set master switch to the OFF position. (2) Disconnect the power to the battery charger. (3) Remove the battery cables, negative (--) lead first. Reconnect the negative (--) lead last when reconnecting the battery. Follow these precautions to prevent starting of the generator set by an automatic transfer switch, remote start/stop switch, or engine start command from a remote computer.

WARNING

DANGER

Hazardous voltage. Will cause severe injury or death.

Disconnect all power sources before opening the enclosure.

WARNING

Hazardous voltage. Can cause severe injury or death.

Operate the generator set only when all guards and electrical enclosures areinplace.

Servicing the generator set when it is operating. Exposed moving parts can cause severe injury or death. Keep

hands, feet, hair, clothing, and test leads away from the belts and pulleys when the generator set is running. Replace guards, screens, and covers before operating the generator set.

Moving parts.

WARNING

Hot engine and exhaust system. Can cause severe injury or death.

Do not work on the generator set until it cools.

Servicing the exhaust system. Hot parts can cause severe injury or death. Do not touch hot engine parts. The

engine and exhaust system components become extremely hot during operation.

Servicing the alternator. Hot parts can cause severe injury or death. Avoid touching the alternator field or exciter

armature. When shorted, the alternator field and exciter armature become hot enough to cause severe burns.

TP-6905 6/14 49Section 4 Scheduled Maintenance

Fire. Can cause severe injury or death.

Do not smoke or permit flames or sparks near fuels or the fuel system.

Page 50

The engine and generator set may use both American Standard and metric hardware. Use the correct size tools to prevent rounding of the bolt heads and nuts.

See the Safety Precautions and Instructions at the beginning of this manual before attempting to service, repair, or operate the generator set. Have an authorized Kohler distributor/dealer perform generator set service.

Engine Service. Perform generator set engine service at the intervals specified by the engine operation manual.

Generator Set Service. Perform generator set service at the intervals specified by the generator set operation manual.

Routine Maintenance. Refer to the following generator set service schedule, the engine service schedule, and the runtime hours shown on the RDC2 controller to determine when to schedule routine maintenance. Service generator sets that are subject to extreme weather or dusty or dirty conditions more frequently.

Maintenance and Service Parts. Obtain maintenance and service parts from an authorized Kohler distributor/dealer.

TP-6905 6/1450 Section 4 Scheduled Maintenance

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4.2 Service Schedule

Procedure

See

System Component or Procedure

Section

General Maintenance

Fluid leaks X Daily

Engine oil level X Daily

Coolant level 4.6.1 X Daily

Obstructions or combustible materials near exhaust outlet

Leaks, hissing, and gas odor X Weekly

Bolts and nuts for tightness X Quarterly or 20 hours

Engine oil and filter [

Belts and belt tension X Yearly or 120 hours

Inspect wiring for cuts, abrasions, or corrosion

Inspect vacuum lines and fittings X 5 Years

4.3 X Yearly or 120 hours

Air Intake System

Air cleaner element [

Air induction for leaks X 3 Years or 500 hours

Intake manifold for vacuum leaks X 3 Years or 500 hours

4.4 Quarterly

Cooling System

Clamps and hoses, tightness and leaks 4.6.2 X X R Daily

Radiator exterior X X Yearly or 120 hours

Coolant condition w

Hoses, condition 4.6.2 X X R 3 Years or 500 hours

4.6.2 X 3 Years or 500 hours

Electrical System

Battery charge]

Battery fluid level ]

Battery for cracks and corrosion X Yearly or 120 hours

Clean battery cables ]

Exhaust System

Exhaust manifold for leaks X R 5 Years or 2000 hours

Exhaust piping for leaks X 5 Years or 2000 hours

Check HEGO (oxygen) sensor connections and wires

4.8 X Yearly or 120 hours

4.5

Fuel System

Fuel lines for leaks X Quarterly

Fuel regulator pressure X Yearly or 120 hours

Fuel shutoff valve for leaks and function X 5 Years or 2000 hours

Ignition System

Spark plug wires for cuts, abrasions, or hardening

Secondary ignition coil wires X R 3 Years or 500 hours

Spark plugs 4.7 X 3 Years or 500 hours

* Not necessary for maintenance-free batteries. [ Service more frequently under extremely dusty/dirty

conditions.Long-life coolant is recommended.

w Long-life coolant is recommended. When long-life coolant is used, the

change interval is 5000 hours or 5 years. Do not mix coolant types.

4.7 X R

Visually

Inspect

X Yearly or 120 hours

Check Change Clean Test

or 20 hr.

XAction D Authorized distributor/dealer

only R Replace as necessaryAuthor-

ized distributor/dealer only R Replace as necessary

3 years or

400 hr.

Frequency

Weekly

5 Years

Hours shown

5 Years or 2000 hours

3 Years or 500 hours

TP-6905 6/14 51Section 4 Scheduled Maintenance

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4.3 Lubrication System

4.3.1 Oil Specifications

Use oil that displays the American Petroleum Institute (API) Starburst certification mark FOR GASOLINE ENGINES on the container. Do not use straight-weight oils recommended for industrial or stationary engines. CC or CD classification oils, even when labeled Heavy Duty or For Natural Gas Engines are not acceptable.

Multi--viscosity synthetic oils are recommended. For best performance in colder environments (such as the United States and Canada), use Society of Automotive Engineers (SAE) 5W-30, API service class SJ or higher. In extremely hot environments where temperatures are never or rarely below a viscosity designation of 10W-30, API service class SJ or higher.

4.3.2 Oil Check

0_C(32_F), use a synthetic oil with

4.3.3 Oil Additions

Adding some oil between oil changes is normal. The amount varies with generator set usage. Open the oil fill cap and pour in a small amount of oil using a funnel or other suitable pouring device. See Section 1, Service Views, for the oil check and oil fill locations.

4.3.4 Oil and Filter Change

Change the oil yearly, after every 120 hours of use, or before generator set storage. Change the oil more frequently if the generator set operates under dirty, dusty conditions. Change the oil while the engine is still warm. See Section 1, Service Views, for oil fill, oil check, and oil filter locations.

Dispose of all waste materials (engine oil, fuel, filter, etc.) in an environmentally safe manner.

Note: Reset the maintenance timer on the RDC2

controller after changing the oil.

Check the oil level in the crankcase every 24 hours of operation or before the engine is started each day. Do not check the oil level while operating the unit. Stop the generator set and keep the generator set level to get an accurate reading.

To check the oil level, remove the dipstick and wipe the end clean. Reinsert the dipstick and wait at least 30 seconds. Remove the dipstick and check the level. Maintain the oil level between the Full and Add marks on the dipstick, as shown in Figure 4-1. See Section 1, Service Views for the dipstick location.

Note: Do not operate the set if the oil level is below the

Add mark or above the Full mark on the dipstick.

1. Full mark

2. Add mark

TP-5586-3

Figure 4-1 Oil Level Check

Oil Change Procedure

Whenever possible, drain the oil while it is still warm.

1. Drain the oil.

a. Press the OFF button on the RDC2 generator

set controller.

b. Disconnect the power for the battery charger.

c. Disconnect the generator set engine starting

battery, negative (--) lead first.

d. Remove the housing side panel.

e. Remove the plug from the oil drain fitting and

install a drain hose.

f. Open the oil drain valve on the engine.

g. Allow time for the engine oil to drain completely.

h. Close the oil drain valve.

i. Replace the oil drain plug.

TP-6905 6/1452 Section 4 Scheduled Maintenance

Page 53

2. Replace the oil filter.

a. Remove the oil filter by rotating it

counterclockwise with an oil filter wrench.

Note: On model 30RCLH only, ensure that the oil

cooler adapter nut is tightened to specification [Torque = 40 Nm (29.5 ft.lbs.)] and that oil cooler adapter and gasket are seated properly.

Note: Model 24RCL

does not have an oil cooler.

1. Oil Filter

2. Oil Cooler Adapter Nut

3. Oil Cooler Adapter

4. Adapter Gasket

Figure 4-2 Oil cooler and adapter nut (model

30RCLH only)

5. Stop the generator set. Check the oil level. Add oil, as necessary, to bring the level up to the Full mark.

Note: Too high an oil level causes high oil

consumption and engine carbonizing. Too low a level damages the engine.

6. Reset the maintenance timer on the RDC2.

a. In the Overview menu, step down to the Next

Maintenance screen.

b. Press the Select button.

c. Press the Up arrow button so that Reset Maint

Timer? Yes is displayed.

d. Press the Select button. The next maintenance

interval and date will be displayed.

b. Clean any surfaces that the oil filter contacts.

c. Apply a light coat of clean oil to the gasket of the

new oil filter.

d. Lightly thread the new oil filter by hand until you

feel resistance. Then, tighten the filter an additional 3/4 turn with an oil filter wrench [Torque = 25 Nm (18.4 ft.lbs.)].

3. Fill with oil. Use 5W-30 for oil selection and Figure 4-3 for oil capacity.

Model Oil Capacity , L (qt.)

24RCL and 30RCLH

4.2 (4.4)

Figure 4-3 Oil Capacity

4. Check for leaks.

a. Press the OFF button on the RDC2 generator

set controller.

b. Reconnect the generator set engine starting

battery, negative (--) lead last.

c. Reconnect the power for the battery charger.

d. Start the generator set and check for leaks

around the oil filter.

e. Stop the generator set and tighten the oil filter to

stop any leaks.

f. Reinstall the housing side panel.

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Page 54

4.4 Air Cleaner

At the interval specified in the service schedule (Section

4.2), inspect and clean or replace the air cleaner element. Clean the element more frequently in dirty, dusty conditions. Check the element for accumulated oil or dirt that could cause poor performance. Replace a damaged air cleaner element. Follow the procedure described below.

Air Cleaner Service Procedure

A dry-type air cleaner silences and filters the intake air. The air intake silencer assembly connects to the intake manifold via a rubber hose. Refer to Figure 4-4 during this procedure.

1. Air Cleaner Cover

GM90280

Figure 4-4 Air Cleaners

1. Release the retaining clips to open the cover and then remove the air cleaner element.

2. Tap the element lightly against a flat surface to dislodge loose surface dirt. Do not clean the element in any liquid or use compressed air as these will damage the filter element. Replace the element and precleaner at the intervals shown in the service schedule.

3. Examine the element and housing for damage. Replace the element and housing if damaged.

4.5 Exhaust System

Generator set operation. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide is an

Carbon monoxide symptoms. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide

D Light-headedness, dizziness D Physical fatigue, weakness in

joints and muscles

D Sleepiness, mental fatigue,

inability to concentrate or speak clearly, blurred vision

4. Wipe the cover and housing with a clean rag to remove dirt. Make sure the sealing surfaces fit correctly.

5. Replace the air cleaner cover.

TP-6905 6/1454 Section 4 Scheduled Maintenance

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Carbon monoxide detectors. Carbon monoxide can cause severe nausea, fainting, or death. Install carbon

monoxide detectors on each level of the building. Locate the detectors to adequately warn the building’s occupants of the presence of carbon monoxide. Keep the detectors operational at all times. Periodically test and replace the carbon monoxide detectors according to the manufacturer’s instructions.

4.6 Cooling System

WARNING

CAUTION

Hazardous noise. Can cause hearing loss.

Never operate the generator set without a muffler or with a faulty exhaust system.

At the interval specified in the service schedule, inspect the exhaust system components (exhaust manifold, exhaust outlet, exhaust line, exhaust clamps, and muffler) for cracks, leaks, and corrosion.

Exhaust System Inspection Points

D Check for corroded or broken metal parts and replace

them as needed.

D Check that the exhaust outlet is unobstructed.

D Check the exhaust gas color. If the exhaust is blue or

black, contact your local authorized Kohler distributor/ dealer.

D Visually inspect for exhaust leaks (blowby). Check for

carbon or soot residue on exhaust components. Carbon and soot residue indicates an exhaust leak. Seal leaks as needed.

D Check that all covers and doors are undamaged, in

place, and locked.

D Check for the installation and operation of carbon

monoxide (CO) detectors on each level of any building near the generator set.

Hot coolant and steam. Can cause severe injury or death.

Before removing the pressure cap, stop the generator set and allow it to cool. Then loosen the pressure cap to relieve pressure.

Allow the engine to cool. Release pressure from the cooling system before removing the pressure cap. To release pressure, cover the pressure cap with a thick cloth and then slowly turn the cap counterclockwise to the first stop. Remove the cap after p ressure has been completely released and the engine has cooled. Check the coolant level at the tank if the generator set has a coolant recovery tank.

4.6.1 Checking and Filling Coolant

Maintain the coolant level in the coolant overflow bottle between the Hot and Cold markings. See Section 1, Service Views, for the coolant overflow bottle location.

Note: Periodically check the coolant level by removing

the radiator’s pressure cap. Do not rely solely on the level in the coolant overflow bottle.

Ethylene glycol-based long-life coolant is recommended. Use a coolant mixture of 50% long-life coolant and 50% clean, softened water to inhibit rust/corrosion and prevent freezing. Add fresh coolant until the level is just below the overflow tube opening.

A coolant solution of 50% ethylene glycol-based coolant provides freezing protection to --37C(--34F) and overheating protection to 149C (300F). A coolant solution with less than 50% ethylene glycol may not provide adequate freezing and overheating protection. A coolant solution with more than 50% ethylene glycol can cause engine or component damage. Do not mix long-life coolant and conventional coolants. Do not mix

different types and/or colors of long life coolants.

TP-6905 6/14 55Section 4 Scheduled Maintenance

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4.6.2 Cooling System Inspection

4.6.4 Flushing and Cleaning

To prevent generator shutdown or damage because of overheating:

D Keep the cooling air inlets clean and unobstructed

D Inspect the radiator’s exterior for obstructions and

remove dirt and foreign material with a soft brush or cloth to avoid damaging the radiator fins.

D Check the hoses and connections for leaks and

replace any cracked, frayed, or spongy hoses.

D Check the condition and tension of the drive belt.

D Check the rubber seal of the radiator’s pressure cap

and replace a cracked or deteriorated cap. Remove dirt and other debris from the pressure cap and filler neck. The pressure cap raises the boiling point of the coolant, enabling higher operating temperatures. If the cap leaks, replace it with the same rating type of cap. Find the pressure cap rating in Figure 4-5.

Item Rating

Pressure cap 97 kPa (14 psi)

Figure 4-5 Pressure Cap Rating

For optimum protection, drain, flush, and refill the cooling system at the interval listed in the service schedule.

Flushing and Cleaning Procedure

1. Flush the system with clean water.

2. Drain, clean, and flush the coolant overflow bottle.

3. Refill the cooling system as instructed in Section 4.6.5.

4.6.5 Filling Cooling System

Coolant Capacity, L (qt.)

Model

24RCL and 30RCLH

Figure 4-6 Coolant Capacity

Note: Do not add coolant to a hot engine. Adding

coolant to a hot engine can cause the cylinder block or cylinder head to crack. Wait until engine has cooled.

Generator Set

12.4 (13.1)

4.6.3 Draining Cooling System

The radiator contains a coolant drain valve to drain the cooling system. When draining the coolant, remove the radiator’s pressure cap, which will allow the entire system to drain and will prevent air pockets from forming and restricting coolant passage to the block.

1. Remove the pressure cap to allow the entire system to drain and prevent air pockets from restricting coolant flow through the engine block.

2. Open the coolant drain valve and allow the system to drain.

3. If the inside of the radiator has mineral deposits or the used coolant contains dirt or grease, go to Section 4.6.4, Flushing and Cleaning. If the cooling system does not have mineral deposits, refill the cooling system as instructed in Section 4.6.5, Filling Cooling System.

1. Close the radiator’s coolant drain valve and tighten the hose clamps.

2. Fill the radiator with the recommended coolant mixture of 50% ethylene glycol and 50% clean, softened water to inhibit rust/corrosion and prevent freezing. The coolant capacity is shown in Figure 4-6.

3. Operate the engine with the radiator cap removed until the thermostat opens and the upper radiator hose becomes hot.

4. Stop the engine and allow it to cool.

5. Add coolant to the radiator to just below the overflow tube on the filler neck. See Section 1, Service Views, for the overflow tube location.

6. Replace the radiator’s pressure cap.

7. Maintain the coolant level in the coolant overflow bottle between the Hot and Cold markings. See Section 1, Service Views, for the coolant overflow bottle location.

TP-6905 6/1456 Section 4 Scheduled Maintenance

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4.7 Ignition System

WARNING

Airborne particles. Can cause severe injury or blindness.

Wear protective goggles and clothing when using power tools, hand tools, or compressed air.

WARNING

Accidental starting. Can cause severe injury or death.

Disabling the generator set. Accidental starting can cause severe injury or death. Before working on the

generator set or equipment connected to the set, disable the generator set as follows: (1) Press the generator set off/reset button to shut down the generator set. (2) Disconnect the power to the battery charger, if equipped. (3) Remove the battery cables, negative (--) lead first. Reconnect the negative (--) lead last when reconnecting the battery. Follow these precautions to prevent the starting of the generator set by the remote start/stop switch.

6. Wipe the interior of the spark plug tubes.

7. Loosen the spark plug with a ratchet and 13/16-in. spark plug socket with a rubber insert to prevent spark plug damage.

8. Use compressed air to remove dirt from around each spark plug to prevent dirt particles from falling into the combustion chamber.

9. Remove spark plugs, one at a time, and examine. Identify a normal spark plug in good operating condition by observing a light tan or gray deposit on firing tip. See Figure 4-9 to evaluate engine condition by color/condition of a problem spark plug.

10. Check that the spark plug washer is in good condition.

11. Clean spark plugs by wiping them with a rag.

Note: Do not sandblast, wire brush, scrape, or

otherwise service spark plugs in poor condition. Obtain a new plug for best results.

12. Check the spark plug gap before installing any spark plug. See Figure 4-7 and Figure 4-8. Attain a correct gap when the feeler (or wire) passes between the spark plug electrodes. It should pass easily but with some resistance or drag; otherwise adjust as necessary.

Model Spark plug gap

24RCL and 30RCLH 0.9–1.0 mm (0.036–0.040 in.)

Figure 4-7 Recommended Spark Plug Gap

Service the spark plugs at the interval specified in the

service schedule using the following procedure.

1. Press the OFF button on the RDC2 controller.

2. Disconnect the power to the battery charger.

3. Disconnect the generator set engine starting

1. 0.9–1.0 mm (0.036–0.040 in.) gap

2. Spark plug electrodes

battery, negative (--) lead first.

Figure 4-8 Spark Plug Gap Inspection

4. Use a cloth to wipe dirt and oil away from the area around each of the four spark plug wires.

5. Remove spark p lug wires by grasping the spark plug boot and turning slightly while pulling. Do not pull the wire. Pulling on the wire rather than the boot may damage the wire or terminal.

TP-6905 6/14 57Section 4 Scheduled Maintenance

1-514

Page 58

Problem/Condition Means of Identification Possible Cause/Solution

Gap-bridged spark plug

Oil-fouled spark plug Wet, black deposits on the insulator shell, bore,

Carbon-fouled spark plug

Lead-fouled spark plug Dark gray, black, yellow, or tan deposits; or a

Pre-ignition damaged spark plug

Overheated spark plug White or light gray insulator with small black or

Worn spark plug Severely eroded or worn electrodes. Caused by normal wear and failure to replace

Built-up deposits and gap between electrodes closing.

and electrodes.

Black, dry, fluffy carbon deposits on insulator tips, exposed shell surfaces and electrodes.

glazed coating on the insulator tip.

Melted electrodes and possibly blistered insulator. Metallic deposits on insulator suggest internal engine damage.

gray/brown spots with bluish (burned) appearance on electrodes.

Oil or carbon fouling. Clean and regap the spark plug.

Excessive oil entering combustion chamber through worn rings and pistons, excessive clearance between valve guides and stems, or worn or loose bearings. Replace the spark plug.

Incorrect spark plug, weak ignition, clogged air intake, overrich fuel mixture, or excessive no-load operation. Clean and regap the spark plug.

Caused by highly leaded fuel. Replace the spark plug.

Wrong type of fuel, incorrect timing or advance, too hot a plug, burned valves, or engine overheating. Replace the spark plug.

Engine overheating, wrong type of fuel, loose spark plugs, too hot a plug, low fuel pressure or incorrect ignition timing. Replace the spark plug.

spark plug at prescribed interval. Replace the spark plug.

Figure 4-9 Engine Evaluation Using Spark Plug Condition

13. Use a gapping tool to gently bend the side electrode closer to or farther from the center electrode to set the correct gap. See Figure 4-10. Position the side electrode directly over the center electrode.

1-511

Figure 4-10 Spark Plug Gap Adjustment

Note: Ensure that the spark plug tubes are seated

before installing the spark plugs. If the tubes were removed, reinstall them before installing the spark plugs.

14. Reinstall the spark plug. Do not bump the electrode against the cylinder head. Rotate the spark plug clockwise until you feel resistance.

15. Use a torque wrench to torque each spark plug to 18 Nm (13.3 ft. lbs.). Otherwise, hand-tighten the spark plug until you feel resistance.

16. Use a ratchet wrench to tighten an additional 1/4 turn. Do not overtighten, as doing so may strip the threads or alter the electrode gap setting.

17. Check the spark plug wire connector in the boot for accumulated dirt, grease, and other debris, and clean as necessary.

18. Firmly push the spark plug boot onto the spark plug.

19. Reconnect the generator set engine starting battery, negative (--) lead last.

20. Reconnect the power for the battery charger.

TP-6905 6/1458 Section 4 Scheduled Maintenance

Page 59

4.8 Battery

Consult the battery manufacturer’s instructions regarding battery care and maintenance.

WARNING

Sulfuric acid in batteries. Can cause severe injury or death.

Wear protective goggles and clothing. Battery acid may cause blindness and burn skin.

Battery electrolyte is a diluted sulfuric acid. Battery acid can cause severe injury or death. Battery acid can cause

blindness and burn skin. Always wear splashproof safety goggles, rubber gloves, and boots when servicing the battery. Do not open a sealed battery or mutilate the battery case. If battery acid splashes in the eyes or on the skin, immediately flush the affected area for 15 minutes with large quantities of clean water. Seek immediate medical aid in the case of eye contact. Never add acid to a battery after placing the battery in service, as this may result in hazardous spattering of battery acid.

Battery short circuits. Explosion can cause severe injury or death. Short circuits can cause bodily injury and/or

equipment damage. Disconnect the battery before generator set installation or maintenance. Remove all jewelry before servicing the equipment. Use tools with insulated handles. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery. Never connect the negative (--) battery cable to the positive (+) connection terminal of the starter solenoid. Do not test the battery condition by shorting the terminals together.

Battery acid cleanup. Battery acid can cause severe injury or death. Battery acid is electrically conductive and

corrosive. Add 500 g (1 lb.) of bicarbonate of soda (baking soda) to a container with4L(1gal.)ofwaterandmixthe neutralizing solution. Pour the neutralizing solution on the spilled battery acid and continue to add the neutralizing solution to the spilled battery acid until all evidence of a chemical reaction (foaming) has ceased. Flush the resulting liquid with water and dry the area.

Battery gases. Explosion can cause severe injury or death. Battery gases can cause an explosion. Do not smoke

or permit flames or sparks to occur near a battery at any time, particularly when it is charging. Do not dispose of a battery in a fire. To prevent burns and sparks that could cause an explosion, avoid touching the battery terminals with tools or other metal objects. Remove all jewelry before servicing the equipment. Discharge static electricity from your body before touching batteries by first touching a grounded metal surface away from the battery. To avoid sparks, do not disturb the battery charger connections while the battery is charging. Always turn the battery charger off before disconnecting the battery connections. Ventilate the compartments containing batteries to prevent accumulation of explosive gases.

TP-6905 6/14 59Section 4 Scheduled Maintenance

Page 60

4.9 Storage Procedure

DANGER

Hazardous voltage. Will cause severe injury or death.

Disconnect all power sources before opening the enclosure.

4. Check the engine coolant protection; see Section 4.6.

Note: Use antifreeze capable of withstanding the

lowest possible temperatures.

5. Keep spark plugs in their holes or seal spark plug holes with suitable threaded metal plugs.

6. Clean the exterior of the generator set and spread a light film of oil or silicon spray over any exposed surfaces that may be subject to rust or corrosion.

Connecting the battery and the battery charger. Hazardous voltage can cause severe injury or death.

Follow the procedure below when storing your generator set for a long period (3 months or more).

1. Start and run the generator set until it reaches operating temperature or about 15 minutes.

2. Stop the generator set.

3. Change the oil and oil filter; see Section 4.3.4, Oil and Filter Change.

7. Seal the air inlet, exhaust pipe, and fuel tank cap with tape.

8. Disconnect and remove the battery. Place the battery in a warm, dry location for the storage period. Recharge the battery once a month to maintain a full charge.

9. Select a well-ventilated (not humid or dusty) location to store the generator.

10. Cover the entire unit with a dust cover.

Note: Run the generator set once a month

whenever possible.

TP-6905 6/1460 Section 4 Scheduled Maintenance

Page 61

Section 5 Troubleshooting

5.1 Introduction

Use the troubleshooting charts in this section to diagnose and correct common problems. First check for simple causes such as a dead engine starting battery, loose connections, or an open circuit breaker. The charts include a list of common problems, possible causes of the problem, and recommended corrective actions.

If the procedures in this manual do not explain how to correct the problem, contact an authorized Kohler distributor/dealer. Maintain a record of repairs and adjustments performed on the equipment. Use the record to help describe the problem and repairs or adjustments made to equipment.

5.2 USB Port

A USB port is located on the front of the controller. Use a USB cable with a mini-B connector to connect the controller to your personal computer (laptop).

Some controller settings can be adjusted using a laptop computer with Kohlerr SiteTecht software. SiteTech software is available to Kohler authorized distributors and dealers. See TP-6701, SiteTecht Software Operation Manual, for more information.

5.3 Fault Messages

The RDC2 controller displays fault messages to aid in troubleshooting. Fault messages, descriptions, and recommended checks are listed in Figure 2-5.

5.4 Circuit Protection

If the generator set circuit breaker trips or the fuses blow repeatedly, contact an authorized Kohler distributor/ dealer for service.

5.4.1 Load Circuit Breaker

The load circuit breaker interrupts the generator output in the event of a fault in the wiring between the generator and the load. If the circuit breaker trips, reduce the load and switch the breaker back to the ON position. Refer to the service views in Section 1 for the location of the circuit breaker.

5.4.2 Fuses

Always identify and correct the cause of a blown fuse before restarting the generator set. Refer to Figure 5-1, Troubleshooting Chart, for conditions that may indicate a blown fuse. Obtain replacement parts and service from an authorized Kohler distributor/dealer.

Fan Fuses. Three 30 amp fan fuses are located in the fan fuse and relay box. See Section 1, Service Views, for location.

5.4.3 Controller Internal Circuit Protection

The controller is equipped with internal circuit protection. Press OFF to reset.

Identify and correct the cause of the fault condition. Then reset the controller after a fault shutdown. See Section 2.6.4.

TP-6905 6/14 61Section 5 Troubleshooting

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5.5 Generator Set Troubleshooting

Figure 5-1 contains generator set troubleshooting, diagnostic, and repair information. Check for loose connections before replacing parts.

Problem Possible Cause Corrective Action

The generator set does not crank.

The generator set cranks but does not start, starts hard, lacks power, or operates erratically.

No AC output.

Low output or excessive drop in voltage.

Generator set stops suddenly.

Fans run after engine shuts down.

Battery weak or dead. Recharge or replace the battery. Battery connections reversed or poor. Check the connections. Blown fuse(s). Replace the fuse. Contact an authorized Kohler

Generator set is OFF. Press the RUN button to start the engine or press AUTO

Air cleaner clogged. Clean and/or replace the air cleaner. Battery weak or dead. Recharge or replace the battery. Battery connection poor. Clean and tighten the battery connections. Spark plug wire connection loose. Check the spark plug wires. Low oil pressure shutdown. Check for oil leaks. Check the oil level and add oil if

Fuel pressure insufficient. Check the fuel supply and valves. Engine malfunction. Contact an authorized Kohler distributor/dealer. AC circuit breaker in the OFF position. Place the circuit breaker in the ON position. AC circuit breaker tripping because of overload. Reduce the load on the generator set. AC circuit breaker tripping because of short

circuit.

Generator set overloaded. Reduce the load.

Low oil pressure shutdown. Check for oil leaks. Check the oil level and add oil if

Outoffuel. Check fuel supply. Overcrank shutdown. Reset the controller. If the overcrank fault occurs again,

Blown fuse(s). Replace the fuse. If the fuse blows again, contact an

Overspeed shutdown. Reset the controller. If the overspeed fault occurs again,

Generator set is OFF. Press the RUN button to start the engine or press AUTO

Remote stop command received from a remote switch, ATS, or OnCuer Plus.

Engine malfunction. Contact an authorized Kohler distributor/dealer. The fans continue to run for 2 minutes after the

engine shuts down to evacuate the engine compartment.

distributor/dealer for service if fuse blows repeatedly.

to allow remote starting.

necessary.

Contact an authorized Kohler distributor/dealer for service.

necessary.

contact an authorized Kohler distributor/dealer.

authorized Kohler distributor/dealer.

contact an authorized Kohler distributor/dealer.

to allow remote starting.

Check the remote switch position.

None.

Figure 5-1 General Troubleshooting Chart

TP-6905 6/1462 Section 5 Troubleshooting

Page 63

5.6 Controller Troubleshooting

Figure 5-2 contains basic troubleshooting information for the RDC2 controller.

Problem Possible Cause Corrective Action

Controller LCD displayisoff.

Controller display backlight is off.

Loss of communication to accessory modules

LCM relays do not operate.

Date is flashing. Controller power was disconnected and then

Low or no battery voltage. Check connections.

Backlight turns off after about 1 minute with no activity.

Bad connections. Check wiring and connections. Verify that cable size

Low or no battery voltage. Check battery connections.

Bad connections. Check wiring and connections. Verify that cable size

Low or no battery voltage. Check battery connections.

reconnected.

Check generator set battery. See Figure 5-1.

Backlight will turn on when a button is pressed or the generator set starts.

and length of run comply with the instructions in the Installation manual.

Check generator set battery. See Figure 5-1.

and length of run comply with the instructions in the Installation manual.

Check generator set battery. See Figure 5-1.

Check battery connections. See Figure 5-1. Check utility power connection for the built-in battery

charger. Reset the time, date, and exercise schedule. See

Section 2.5.7, Setting the Exerciser at Power-Up.

Figure 5-2 RDC2 Troubleshooting Chart

TP-6905 6/14 63Section 5 Troubleshooting

Page 64

Notes

TP-6905 6/1464 Section 5 Troubleshooting

Page 65

Appendix A Abbreviations

The following list contains abbreviations that may appear in this publication.

A, amp ampere ABDC after bottom dead center AC alternating current A/D analog to digital ADC advanced digital control;

adj. adjust, adjustment ADV advertising dimensional

Ah amp-hour AHWT anticipatory high water

AISI American Iron and Steel

ALOP anticipatory low oil pressure alt. alternator Al aluminum ANSI American National Standards

AO anticipatory only APDC Air Pollution Control District API American Petroleum Institute approx. approximate, approximately APU Auxiliary Power Unit AQMD Air Quality Management District AR as required, as requested AS as supplied, as stated, as

ASE American Society of Engineers ASME American Society of

assy. assembly ASTM American Society for Testing

ATDC after top dead center ATS automatic transfer switch auto. automatic aux. auxiliary avg. average AVR automatic voltage regulator AWG American Wire Gauge AWM appliance wiring material bat. battery BBDC before bottom dead center BC battery charger, battery

BCA battery charging alternator BCI Battery Council International BDC before dead center BHP brake horsepower blk. black (paint color), block

BMEP brake mean effective pressure bps bits per second br. brass BTDC before top dead center Btu British thermal unit Btu/min. British thermal units per minute C Celsius, centigrade cal. calorie CAN controller area network CARB California Air Resources Board CAT5 Category 5 (network cable) CB circuit breaker CC crank cycle cc cubic centimeter CCA cold cranking amps ccw. counterclockwise CEC Canadian Electrical Code cert. certificate, certification, certified cfh cubic feet per hour cfm cubic feet per minute

analog to digital converter

drawing

temperature

Institute

Institute (formerly American Standards Association, ASA)

suggested

Mechanical Engineers

Materials

charging

(engine)

CG center of gravity CID cubic inch displacement CL centerline cm centimeter CMOS complementary metal oxide

com communications (port) coml commercial Coml/Rec Commercial/Recreational conn. connection cont. continued CPVC chlorinated polyvinyl chloride crit. critical CSA Canadian Standards

CT current transformer Cu copper cUL Canadian Underwriter’s

CUL Canadian Underwriter’s

cu. in. cubic inch cw. clockwise CWC city water-cooled cyl. cylinder D/A digital to analog DAC digital to analog converter dB decibel dB(A) decibel (A weighted) DC direct current DCR direct current resistance deg.,  degree dept. department dia. diameter DI/EO dual inlet/end outlet DIN Deutsches Institut fur Normung

DIP dual inline package DPDT double-pole, double-throw DPST double-pole, single-throw DS disconnect switch DVR digital voltage regulator

PROM, EEPROM

E, emer. emergency (power source) ECM electronic control module,

EDI electronic data interchange EFR emergency frequency relay e.g. for example (exempli gratia) EG electronic governor EGSA Electrical Generating Systems

EIA Electronic Industries

EI/EO end inlet/end outlet EMI electromagnetic interference emiss. emission eng. engine EPA Environmental Protection

EPS emergency power system ER emergency relay ES engineering special,

ESD electrostatic discharge est. estimated E-Stop emergency stop etc. et cetera (and so forth) exh. exhaust

substrate (semiconductor)

Association

Laboratories

e. V. (also Deutsche Industrie Normenausschuss)

electrically-erasable programmable read-only memory

engine control module

Association

Agency

engineered special

ext. external F Fahrenheit, female FHM flat head machine (screw) fl. oz. fluid ounce flex. flexible freq. frequency FS full scale ft. foot, feet ft. lb. foot pounds (torque) ft./min. feet per minute ftp file transfer protocol ggram ga. gauge (meters, wire size) gal. gallon gen. generator genset generator set GFI ground fault interrupter

GND, gov. governor gph gallons per hour gpm gallons per minute gr. grade, gross GRD equipment ground gr. wt. gross weight H x W x D height by width by depth HC hex cap HCHT high cylinder head temperature HD heavy duty HET high exhaust temp., high

hex hexagon Hg mercury (element) HH hex head HHC hex head cap HP horsepower hr. hour HS heat shrink hsg. housing HVAC heating, ventilation, and air

HWT high water temperature Hz hertz (cycles per second) IBC International Building Code IC integrated circuit ID inside diameter, identification IEC International Electrotechnical

IEEE Institute of Electrical and

IMS improved motor starting in. inch in. H in. Hg inches of mercury in. lb. inch pounds Inc. incorporated ind. industrial int. internal int./ext. internal/external I/O input/output IP internet protocol ISO International Organization for

J joule JIS Japanese Industry Standard k kilo (1000) Kkelvin kA kiloampere KB kilobyte (2 KBus Kohler communication protocol kg kilogram

ground

engine temp.

conditioning

Commission

Electronics Engineers

O inches of water

Standardization

bytes)

TP-6905 6/14 Appendix 65

Page 66

kg/cm

kgm kilogram-meter kg/m

kilograms per square centimeter

kilograms per cubic meter kHz kilohertz kJ kilojoule km kilometer kOhm, k kilo-ohm kPa kilopascal kph kilometers per hour kV kilovolt kVA kilovolt ampere kVAR kilovolt ampere reactive kW kilowatt kWh kilowatt-hour kWm kilowatt mechanical kWth kilowatt-thermal L liter LAN local area network L x W x H length by width by height lb. pound, pounds

lbm/ft

pounds mass per cubic feet LCB line circuit breaker LCD liquid crystal display LED light emitting diode Lph liters per hour Lpm liters per minute LOP low oil pressure LP liquefied petroleum LPG liquefied petroleum gas LS left side L

LWL low water level

sound power level, A weighted

LWT low water temperature m meter, milli (1/1000) M mega (10

units), male

cubic meter

/hr. cubic meters per hour /min. cubic meters per minute

when used with SI

mA milliampere man. manual max. maximum MB megabyte (2

bytes) MCCB molded-case circuit breaker MCM one thousand circular mils meggar megohmmeter MHz megahertz mi. mile mil one one-thousandth of an inch min. minimum, minute misc. miscellaneous MJ megajoule mJ millijoule mm millimeter mOhm, mmilliohm MOhm, Mmegohm MOV metal oxide varistor MPa megapascal mpg miles per gallon mph miles per hour MS military standard ms millisecond m/sec. meters per second mtg. mounting MTU Motoren-und Turbinen-Union MW megawatt mW milliwatt F microfarad N, norm. normal (power source) NA not available, not applicable nat. gas natural gas NBS National Bureau of Standards

NC normally closed NEC National Electrical Code NEMA National Electrical

NFPA National Fire Protection

Manufacturers Association

Association Nm newton meter NO normally open no., nos. number, numbers NPS National Pipe, Straight NPSC National Pipe, Straight-coupling NPT National Standard taper pipe

thread per general use NPTF National Pipe, Taper-Fine NR not required, normal relay ns nanosecond OC overcrank OD outside diameter OEM original equipment

manufacturer OF overfrequency opt. option, optional OS oversize, overspeed OSHA Occupational Safety and Health

Administration OV overvoltage oz. ounce p., pp. page, pages PC personal computer PCB printed circuit board pF picofarad PF power factor ph.,  phase PHC Phillipsr head Crimptiter

(screw) PHH Phillipsr hex head (screw) PHM pan head machine (screw) PLC programmable logic control PMG permanent magnet generator pot potentiometer, potential ppm parts per million PROM programmable read-only

memory psi pounds per square inch psig pounds per square inch gauge pt. pint PTC positive temperature coefficient PTO power takeoff PVC polyvinyl chloride qt. quart, quarts qty. quantity R replacement (emergency)

power source rad. radiator, radius RAM random access memory RBUS RS-485 proprietary

communications RDO relay driver output ref. reference rem. remote Res/Coml Residential/Commercial RFI radio frequency interference RH round head RHM round head machine (screw) rly. relay rms root mean square rnd. round RO read only ROM read only memory rot. rotate, rotating rpm revolutions per minute RS right side RTDs Resistance Temperature

Detectors

RTU remote terminal unit RTV room temperature vulcanization RW read/write SAE Society of Automotive

Engineers scfm standard cubic f eet per minute SCR silicon controlled rectifier s, sec. second SI Systeme international d’unites,

International System of Units SI/EO side in/end out sil. silencer SMTP simple mail transfer protocol SN serial number SNMP simple network management

protocol SPDT single-pole, double-throw SPST single-pole, single-throw spec specification specs specification(s) sq. square sq. cm square centimeter sq. in. square inch SMS short message service SS stainless steel std. standard stl. steel tach. tachometer TB terminal block TCP transmission control protocol TD time delay TDC top dead center TDEC time delay engine cooldown TDEN time delay emergency to

normal TDES time delay engine start TDNE time delay normal to

emergency TDOE time delay off to emergency TDON time delay off to normal temp. temperature term. terminal THD total harmonic distortion TIF telephone influence factor tol. tolerance turbo. turbocharger typ. typical (same in multiple

locations) UF underfrequency UHF ultrahigh frequency UIF user interface UL Underwriter’s Laboratories, Inc. UNC unified coarse thread (was NC) UNF unified fine thread (was NF) univ. universal URL uniform resource locator

(web address) US undersize, underspeed UV ultraviolet, undervoltage Vvolt VAC volts alternating current VAR voltampere reactive VDC volts direct current VFD vacuum fluorescent display VGA video graphics adapter VHF very high frequency Wwatt WCR withstand and closing rating w/ with WO write only w/o without wt. weight xfmr transformer

TP-6905 6/1466 Appendix

Page 67

Page 68

TP-6905 6/14

KOHLER CO. Kohler, Wisconsin 53044 Phone 920-457-4441, Fax 920-459-1646

Kohler Power Systems Asia Pacific Headquarters 7 Jurong Pier Road Singapore 619159 Phone (65) 6264-6422, Fax (65) 6264-6455

For the nearest KOHLER authorized installation, service, and sales dealer in the US and Canada: Call 1-800-544-2444 or visit KOHLERPower.com