Operation
Residential/Commercial Generator Sets
Models:
14/20RESA
14/20RESAL
Controllers:
RDC2
DC2
TP-6804 12/11
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
Table of Contents
Product Identification Information 2............................................................
Safety Precautions and Instructions 7........................................................
Introduction 11...............................................................................
Service Assistance 13........................................................................
Section 1 Descriptions and Service Views 15..................................................
1.1 Introduction 15..........................................................
1.2 Engine 15...............................................................
1.3 Generator Set Enclosure 15...............................................
1.4 Alternator 15............................................................
1.5 Transfer Switch 15.......................................................
1.6 Controllers 15...........................................................
1.7 Accessories 18..........................................................
1.7.1 Carburetor Heater 18.............................................
1.7.2 Fuel Regulator Heater (20RESA and RESAL only) 18.................
1.7.3 OnCue Home Generator Management System 18....................
1.7.4 Programmable Interface Module (PIM) 18...........................
1.7.5 Load Control Module (LCM) 18....................................
1.8 Service Views 19........................................................
Section 2 Generator Set Operation 21.........................................................
2.1 Prestart Checklist 21.....................................................
2.2 Exercising the Generator Set 21...........................................
2.3 Generator Set Operation 21...............................................
2.3.1 Local Starting and Stopping 21....................................
2.3.2 Automatic Starting and Stopping 21................................
2.3.3 Remote Starting and Stopping 21..................................
2.3.4 Engine Start Crank Cycle 21.......................................
2.3.5 Engine Cooldown 21.............................................
2.3.6 Automatic Operation with Model RXT Transfer Switch 22..............
2.3.7 Automatic Operation with Model RDT or RSB Transfer Switches 22.....
2.4 Exercise 23.............................................................
2.4.1 Setting the Exerciser 23...........................................
2.4.2 Unloaded Cycle Exercise with Complete System Diagnostics 23........
2.4.3 Unloaded Full-Speed Exercise 24..................................
2.4.4 Loaded Full-Speed Exercise (with RXT only) 24......................
2.4.5 Power Failure During Exercise Cycle 24.............................
2.5 Faults 24...............................................................
2.5.1 Warnings 24.....................................................
2.5.2 Shutdowns 24...................................................
2.5.3 ATS Communication Errors 24.....................................
2.5.4 Resetting the Controller after a Fault Shutdown 25....................
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 Setting the Exerciser 34..................................................
3.6.1 Setting the Exerciser at Controller Powerup 34.......................
3.6.2 Changing the Exercise Settings 34.................................
TP-6804 12/11 Table of Contents
Table of Contents, continued
3.7 RDC2 Controller Menus 36................................................
3.8 Main Menu 36...........................................................
3.9 Overview Menu 37.......................................................
3.10 Engine Metering Menu 37.................................................
3.11 Generator Metering Menu 38..............................................
3.12 Generator Set Information Menu 39........................................
3.13 Genset Run Time Menu 39................................................
3.14 Genset System Menu 40..................................................
3.15 ATS Status Menu 41.....................................................
3.16 ATS Configuration Menu 42...............................................
3.17 Date and Time Menu 43..................................................
3.18 Networking Information Menus 43..........................................
3.18.1 Networking Status Submenu 44....................................
3.18.2 Networking Configuration Submenu (OnCue Password) 45............
3.18.3 RBUS Information 46.............................................
3.18.4 Remote Devices Submenu 47.....................................
3.19 Programmable Interface Module (PIM) Status Menu 48.......................
3.20 Load Control Module (LCM) Menus 49......................................
3.21 Event Log 50............................................................
Section 4 DC2 Controller Operation 51........................................................
4.1 DC2 Generator Set/ Transfer Switch Controller 51............................
4.2 Controls and Indicators 51................................................
4.2.1 Controller Keypad 52.............................................
4.2.2 LED Indicators 52................................................
4.2.3 LCD Display 53..................................................
4.3 Controller Power 53......................................................
4.4 Battery Charging 53......................................................
4.5 Exercise 54.............................................................
4.5.1 Exercise Modes 54...............................................
4.5.2 Setting the Exerciser 54...........................................
4.5.3 Exerciser Reset 54...............................................
4.6 Event Log 54............................................................
4.7 Maintenance Timer 55....................................................
4.8 OnCue Password 55.....................................................
Section 5 Scheduled Maintenance 57..........................................................
5.1 Scheduled Maintenance 57...............................................
5.1.1 Service Schedule, 14RESA/RESAL Models 58......................
5.1.2 Service Schedule, 20RESA/RESAL Models 59......................
5.2 Lubrication System 60....................................................
5.2.1 Low Oil Pressure Shutdown 60....................................
5.2.2 Oil Check 60....................................................
5.2.3 Engine Oil Recommendation 60....................................
5.2.4 Oil Change Procedure 60.........................................
5.2.5 Resetting the Maintenance Timer 61................................
5.2.6 Oil Cooler 20RESA/RESAL 61.....................................
5.3 Spark Plugs 62..........................................................
5.4 Air Cleaner Service 62....................................................
5.4.1 Air Cleaner, 14RESA/RESAL Models 62............................
5.4.2 Air Cleaner, 20RESA/RESAL Models 63............................
5.5 Cooling System 64.......................................................
5.6 Exhaust System 64......................................................
5.7 Battery 65...............................................................
TP-6804 12/11Table of Contents
Table of Contents, continued
5.8 Storage Procedure 66....................................................
5.8.1 Lubricating System 66............................................
5.8.2 Fuel System 66..................................................
5.8.3 Cylinder Lubrication 66...........................................
5.8.4 Exterior Preparation 66...........................................
5.8.5 Battery 66.......................................................
Section 6 Troubleshooting 67.................................................................
6.1 Introduction 67..........................................................
6.2 Fault Messages 67.......................................................
6.3 Circuit Protection 67......................................................
6.3.1 Controller Internal Circuit Protection 67.............................
6.3.2 Line Circuit Breaker 67...........................................
6.3.3 Auxiliary Winding Circuit Breaker 67................................
6.4 Controller Service Access 67..............................................
6.5 Troubleshooting 68.......................................................
Appendix A Abbreviations 69..................................................................
TP-6804 12/11 Table of Contents
Notes
TP-6804 12/116
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,or
substantial 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. Isolatethe 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
containerwith4L(1gal.)ofwaterand
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.
TP-6804 12/11 7Safety Precautions and Instructions
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.
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 air cleaner. A sudden
backfire can cause severe injury or
death. Do not operate the generator
set with the air cleaner removed.
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.
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 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.
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.
TP-6804 12/118 Safety Precautions and Instructions
Fuel System
Hazardous Noise
WARNING
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
inawell-ventilatedareaawayfrom
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. Donot operate the
generator set in the presence of fuel
leaks, fuel accumulation, or sparks.
Repair fuel systems before resuming
generator set operation.
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.
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/
Moving Parts
DANGER
Hazardous voltage.
Will cause severe injury or death.
This equipment must be installed and
serviced by qualified electrical
personnel.
WARNING
Hazardous voltage.
Can cause severe injury or death.
Moving parts.
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.
CAUTION
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).
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.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
TP-6804 12/11 9Safety Precautions and Instructions
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.
Hot Parts
WARNING
Hot engine and exhaust system.
Can cause severe injury or death.
Do not work on the generator set until
it cools.
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.
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.
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 severe
injury or death to utility personnel
working on power lines.
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 heater. Hot
parts can cause minor personal
injury or property damage. Installthe
heater before connecting it to power.
Operating the heater before installation
can cause burns and component
damage. Disconnect power to the
heater and allow it to cool before
servicing the heater or nearby parts.
Heavy Equipment
WARNING
Unbalanced weight.
Improper lifting can cause severe
injury or death and equipment
damage.
Do not use lifting eyes.
Lift the generator set using lifting bars
inserted through the lifting holes on
the skid.
TP-6804 12/1110 Safety Precautions and Instructions
Introduction
This manual provides operation and maintenance
instructions for residential/commercial model
14/20RESA and RESAL generator sets equipped with
Kohler RDC2 or DC2 generator set/transfer switch
controllers. See Figure 1. The RDC2 and DC2
controllers control the generator set and the optional
Model RXT transfer switch.
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 distributor/dealer or service technician.
Refer to TP-6803, 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 products 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 service requirements are very important
to safe and efficient operation. Inspect the parts often
and perform required service at the prescribed intervals.
Obtain service from an authorized service distributor/
dealer to keep equipment in top condition.
List of Related Literature
Figure 2 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
Installation Manual, Model
14/20RESA/RESAL Generator Set
Operation/Installation Manual, Model
RXT Automatic Transfer Switch
Operation/Installation Manual, Model
RDT Automatic Transfer Switch
Installation Manual, Model RSB
Automatic Transfer Switch
Operation Manual, Model RSB
Automatic Transfer Switch
Service Manual, 14/20RESA/RESAL
Generator Set
Operation Manual, OnCuer Software TP-6796
Operation Manual, SiteTecht Software TP-6701
Installation Instructions, Load Control
Module (LCM)
Installation Instructions, Programmable
Interface Module (PIM)
Figure 2 Related Literature
TP-6803
TP-6807
TP-6345
TP-6486
TP-6487
TP-6735
TT-1574
TT-1584
Figure 1 RESA/RESAL Generator Set
TP-6804 12/11 11Introduction
Nameplate
The following illustration 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 views in Section 1.8 for
the nameplate location.
GM12070
The Emission Compliance Period referred to on the
Emission Control or Air Index label indicates the number
of operating hours for which the engine has been shown
to meet CARB or EPA emission requirements. Figure 3
provides the engine compliance period (in hours)
associated with the category descriptor, which may be
found on the certification label.
Emission Compliance Period
EPA
CARB
Category C
250 hours
Moderate
125 hours
Category B
500 hours
Intermediate
250 hours
Category A
1000 hours
Extended
500 hours
Figure 3 Emission Compliance Period
Refer to the certification label for engine displacement.
The exhaust emission control system for the CH740
engines (14RESA/RESAL) is EM for U.S. EPA,
California, and Europe.
The exhaust emission control system for the CH1000
engine (20RESA/RESAL) is EM for U.S. EPA,
California, and Europe.
Emission Information
The Kohlerr Model CH740 engine used on the
14RESA/RESAL generator set is certified to operate
using natural gas or propane fuel.
The Kohler Model CH1000 engine used on the
20RESA/RESAL generator set is certified to operate
using propane fuel. The CH1000 engine used on the
20RESA/RESAL may be operated on natural gas fuel
because it is excluded from the requirements of
40 CFR 1048 as a stationary engine.
The engine used in the Model 20RESA/RESAL
generator set is certified for emergency standby use
only.
TP-6804 12/1112 Introduction
Service Assistance
For professional advice on generator set power
requirements and conscientious service, please contact
your nearest 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
3 rue de Brennus
93200 Saint Denis
France
Phone: (33) 1 49 178300
Fax: (33) 1 49 178301
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-6804 12/11 13Service Assistance
Notes
TP-6804 12/1114 Service Assistance
Section 1 Descriptions and Service Views
1.1 Introduction
The generator set specification sheets provide specific
generator and engine information. Refer to the spec
sheet for data not supplied in this manual. Consult the
generator set service manual, engine operation manual,
and engine service manual for additional specifications.
Obtain copies of the latest spec sheets, manuals,
diagrams, and drawings from your local distributor/
dealer.
1.2 Engine
The generator set has a four-cycle, twin cylinder, aircooled Kohlerr engine. The engine operates on cleanburning natural gas or propane (LP) vapor. Engine
features include:
D Efficient overhead valve design and full pressure
lubrication for maximum power, torque, and reliability
under all operating conditions.
D Dependable, maintenance-free electronic ignition.
D Precision-formulated cast iron construction of parts
subjected to the most wear and tear.
1.4 Alternator
The generator uses Kohler’s unique PowerBoostt
voltage regulation system, which provides instant
response to load changes.
PowerBoostt ensures reliable motor starting and
consistent voltage levels. PowerBoostt utilizes a
voltage excitation system that employs a winding
independent of the main output windings to provide
excitation voltage.
1.5 Transfer Switch
The RDC2 and DC2 controllers are designed to
interface with and control the Kohler Model RXT
Automatic Transfer Switch (ATS). Do not use the Kohler
Model RRT transfer switch with the RDC2 or DC2
controller.
If the power system uses a different model transfer
switch, the RDC2 and DC2 controllers will not control the
transfer switch. An ATS other than the Model RXT must
be equipped with a transfer switch controller and engine
start contacts that connect to the remote engine start
terminals on the generator set.
D Field-convertible multi-fuel systems that allow fuel
changeover from natural gas to LP vapor (and viceversa) while maintaining CARB emission
certification.
D Digital spark advance optimizes ignition timing for the
selected fuel.
1.3 Generator Set Enclosure
The generator set is housed in an exclusive engineered
composite enclosure that is corrosion-proof, even in
harsh seaside environments, and impact-resistant,
even in cold weather. The enclosure has a hinged,
locking roof that allows easy access to the generator set
controller when required, but locks securely to prevent
unauthorized access.
To open the roof, insert the tool provided with the
enclosure and turn counterclockwise 1/4 turn. Then just
raise the roof. The roof stays open until you are ready to
close it.
Be sure to close and lock the enclosure, and keep the
tool in a secure location.
1.6 Controllers
RESA models are equipped with the Residential Digital
Control (RDC2). RESAL models use the Digital Control
(DC2). See Figure 1-1.
The controller provides integrated control for the
generator set, Kohlerr Model RXT transfer switch,
programmable interface module (PIM), and load control
module (LCM).
RDC2 (RESA) DC2 (RESAL)
Figure 1-1 Controllers
TP-6804 12/11 15Section 1 Descriptions and Service Views
The controller’s 2-line LCD screen displays status
messages and system settings that are clear and easy
to read, even in direct sunlight or low light.
D Front-access mini USB connector for SiteTecht
connection
D Front access mini-breaker protects the alternator
RDC2 Controller Features
D Six-button keypad
d OFF, AUTO, and RUN pushbuttons
d Select and arrow buttons for access to system
configuration and adjustment menus
D LED indicators for OFF, AUTO, and RUN modes
D LED indicators for utility power and generator set
source availability and ATS position (Model RXT
transfer switch required)
D LCD display
d Two lines x 16 characters per line
d Backlit display with adjustable contrast for
excellent visibility in all lighting conditions
D Scrolling system status display
d Generator set status
d Voltage and frequency
d Engine temperature
d Oil pressure
d Battery voltage
d Engine runtime hours
D Date and time displays
D Smart engine cooldown senses engine temperature
D Digital isochronous governor to maintain
steady-state speed at all loads
D Digital voltage regulation: ±0.5% RMS no-load to
full-load
D Automatic start with programmed cranking cycle
D Programmable exerciser can be set to start
automatically on any future day and time, and run
every week or every two weeks
D Exercise modes
D Integral Ethernet connector for Kohlerr OnCuet
D Built-in 2.5 amp battery charger
D Remote two-wire start/stop capability for optional
connection of Model RDT or RSB transfer switches
D Diagnostic messages
d Displays diagnostic messages for the engine,
generator, Model RXT transfer switch,
programmable interface module (PIM), and load
control module (LCM)
d Over 70 diagnostic messages can be displayed
D Maintenance reminders
D System settings
d System voltage, frequency, and phase
d Voltage adjustment
d Measurement system, English or metric
D ATS status (Model RXT ATS required)
d Source availability
d ATS position (normal/utility or
emergency/generator)
d Source voltage and frequency
D ATS control (Model RXT ATS required)
d Source voltage and frequency settings
d Engine start time delay
d Transfer time delays
d Voltage calibration
d Fixed pickup and dropout settings
D Programmable Interface Module (PIM) status
displays
d Input status (active/inactive)
d Output status (active/inactive)
d Unloaded weekly exercise with complete system
diagnostics
d Unloaded full-speed exercise
d Loaded full-speed exercise (Model RXT ATS
required)
D Load control module (LCM) menus
d Load status
d Test function
TP-6804 12/1116 Section 1 Descriptions and Service Views
DC2 Controller Features
D Automatic start with programmed cranking cycle
D Four-button keypad: OFF, AUTO, RUN, and
EXERCISE pushbuttons
D LED indicators for OFF, AUTO, and RUN modes
D LCD display:
d Two lines x 16 characters per line
d Backlit display with adjustable contrast for
excellent visibility
D Scrolling system status display
d Generator set status
d Voltage and frequency
d Engine temperature
d Oil pressure
d Battery voltage
d Engine runtime hours
d Maintenance reminders
d OnCue status (connected/disconnected)
D Date and time displays
D Smart engine cooldown senses engine temperature
D Exercise modes
d Unloaded weekly exercise with complete system
diagnostics
d Unloaded full-speed exercise
d Loaded full-speed exercise (Model RXT ATS
required)
D Front-access mini USB connector for SiteTecht
connection
D Front access mini-breaker protects the alternator
D Integral Ethernet connector for Kohlerr OnCuet
D Built-in 2.5 amp battery charger
D Remote two-wire start/stop capability for optional
connection of Model RDT or RSB transfer switches
D Diagnostic messages
d Displays diagnostic messages for the engine,
generator set, model RXT transfer switch, and
optional programmable interface module (PIM)
and load control module (LCM)
d Over 70 diagnostic messages can be displayed
D Digital isochronous governor to maintain
steady-state speed at all loads
D Digital voltage regulation: ±0.5% RMS no-load to
full-load
D A laptop computer and Kohlerr SiteTech software
can be used to change system settings or upgrade
controller firmware.
TP-6804 12/11 17Section 1 Descriptions and Service Views
1.7 Accessories
The following optional accessories are offered for the
RESA and RESAL generator sets.
1.7.1 Carburetor Heater
An optional carburetor heater is recommended for
improved cold starting in locations where the ambient
temperature drops below 0_C (32_F). The carburetor
heater prevents condensation and carburetor icing. The
heater requires a continuous source of 120 VAC power.
See the generator set Installation manual for more
information.
1.7.4 Programmable Interface Module
(PIM)
The optional Programmable Interface Module (PIM)
provides two programmable inputs and six
programmable dry contact outputs for connection to
customer-supplied equipment. The outputs are
controlled by the RDC2 controller, and can also be
controlled remotely using the OnCue program.
The PIM is mounted in a NEMA 3R aluminum enclosure,
which can be mounted indoors or outdoors. See the
installation instructions provided with the PIM.
1.7.5 Load Control Module (LCM)
1.7.2 Fuel Regulator Heater (20RESA
and RESAL only)
An optional fuel regulator heater for the
20RESA/20RESAL is recommended for improved cold
starting in locations where the ambient temperature
drops below --18_C(0_F). The heater requires a
continuous source of 120 VAC power.
See the generator set Installation manual for more
information.
1.7.3 OnCue Home Generator
Management System
The Kohlerr OnCuet Home Generator Management
System allows monitoring and control of your RESA or
RESAL generator set from a personal computer located
in your home or at other remote locations. OnCuet can
also be configured to send email or text message
notifications in the event of a generator set fault.
Note: Be sure to obtain the correct version of the
OnCuet kit for the RDC2/DC2 controller.
The optional Load Control Module (LCM) provides an
automatic load management system to comply with
Section 702.5 of NEC 2008. The installer is responsible
for ensuring that the power system installation complies
with all applicable state and local codes.
The LCM automatically manages up to six residential
loads. Four power relays are provided for management
of non-essential secondary loads, and two relays are
available to control two independent air conditioner
loads.
The LCM is controlled by the RDC2/DC2 controller. The
load on the generator set is monitored, and loads are
added or shed in the order of their priority. See
specification sheet G6-120 and the LCM installation
instructions for more information.
OnCuet version 3.0 is required for RESA/RESAL
generator sets equipped with the RDC2/DC2 controller.
OnCuet versions numbered 1.x are not compatible
with the RDC2/DC2 controller.
TP-6804 12/1118 Section 1 Descriptions and Service Views
1.8 Service Views
2
5
1
8
7
6
3
4
10
11
12
13
14
15
9
1. Hinged inner cover
2. Hinged roof
3. Air intake
4. Lock
5. Locking tool, provided with generator set
6. Exhaust outlet
7. Oil check (dipstick)
8. Oil fill
9. Lifting holes
10. Muffler
11. Air cleaner
12. Oil filter
13. Line circuit breaker
14. USB connector (for firmware updates)
26
16, 17
18
19
AIR INTAKE SIDE --PANEL
REMOVED TO SHOW DETAIL
20
21
25
24
15. RDC2 or DC2 controller
16. Field-connection terminal block (behind panel)
17. Digital spark advance ignition (DSAI) leads
18. Fuel block (14 kW models) or LP orifice location (20 kW models,
inside hose fitting)
19. Fuel inlet
20. Fuel solenoid valve
21. Gas regulator assembly
22. 120 VAC receptacles for optional carburetor heater (not shown)
23. Engine starting battery location (battery purchasd separately)
24. Oil drain hose
25. Nameplate location
26. Oil drain valve
22
23
ADV-8424
Figure 1-2 Service View (Model 20RESA shown)
TP-6804 12/11 19Section 1 Descriptions and Service Views
Notes
TP-6804 12/1120 Section 1 Descriptions and Service Views
Section 2 Generator Set Operation
2.1 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 clean and unobstructed air inlets.
Battery. Check for tight battery connections. Consult
the battery manufacturer’s instructions regarding
battery care and maintenance.
Exhaust System. Check for exhaust leaks and
blockages. Check the muffler condition.
D Inspect the exhaust system components for cracks,
leaks, and corrosion. Check for tight exhaust system
connections.
D Check for corroded or broken metal parts and replace
them as needed.
D Check that the exhaust outlet is unobstructed.
Oil Level. Check the oil level before starting the
generator set and at the intervals given in Section 5,
Scheduled Maintenance. Maintain the oil level at or
near, not over, the full mark on the dipstick.
Operating Area. 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.
2.2 Exercising the Generator Set
Operate the generator set without load once each week
for 20 minutes. See Section 2.4 for information about
loaded and unloaded exercise modes. For instructions
to set the exerciser, see:
D Section 3.6 for the RDC2 controller
2.3 Generator Set Operation
2.3.1 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.
2.3.2 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.
2.3.3 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.
2.3.4 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 2.5.
Cranking 1, 2, and 3 are displayed during the crank
cycle. Pressing the OFF button during the crank cycle
stops the cranking. No other buttons are acknowledged
during the crank cycle.
D Section 4.5 for the DC2 controller
TP-6804 12/11 21Section 2 Generator Set Operation
2.3.5 Engine Cooldown
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.
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.
2.3.6 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 the Model RXT Transfer
Switch Operation/Installation Manual for more
information about transfer switch operation.
The controller must be in AUTO mode for automatic
transfer switch operation.
Automatic Stop with Engine Cooldown
1. When the utility source is restored, the
Emergency-to-Normal time delay starts.
2. When the Emergency-to-Normal time delay
expires, the load is transferred to the utility.
3. The generator set runs through the engine
cooldown cycle and then stops.
2.3.7 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 controller must be in AUTO mode to respond to
remote start/stop signals from an ATS or remote switch.
Press the AUTO button to put the controller into
automatic mode.
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.
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.
TP-6804 12/1122 Section 2 Generator Set Operation
2.4 Exercise
The RDC2 and DC2 controllers can be set to
automatically run the generator set at the same time and
day each week. Exercising the generator set weekly or
every two weeks is required 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 2.4.2 through 2.4.4 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.
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.
2.4.1 Setting the Exerciser
When power is applied to the RDC2 controller (that is,
when the battery is connected), you will be prompted to
set the date and time, and then to set the exerciser.
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.
3min.
Engine Speed, RPM
1min.
10 min. 5 min.
Engine
Exercise
Full-Speed
Diagnostics
1min.
Cooldown
Figure 2-1 Unloaded Exercise Cycle
System Diagnostics
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. See Section 3.5 for
more detailed instructions to change settings on the
RDC2. See Section 3.6 for more detailed instructions to
set the exerciser or change the exercise settings.
The DC2 controller does not prompt you to set the
exerciser. See Section 4.5 for instructions to set the
exerciser on the DC2.
2.4.2 Unloaded Cycle Exercise with
Complete System Diagnostics
An unloaded 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 default
exercise setting.
The Unloaded Cycle exercise runs the engine for 20
minutes in the cycle shown in Figure 2-1 and described
below.
During the unloaded exercise, the controller monitors
the following data. The controller display indicates that
the generator set is running, unless a fault is detected as
described below.
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, the
condition is indicated on the display.
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
reduced 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
TP-6804 12/11 23Section 2 Generator Set Operation
RDC2/DC2 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 reduced and full
speeds. If the oil pressure is low, the Low Oil Pressure
message is displayed and the generator set shuts
down.
The generator set continues to run and supply power to
the load for the duration of the utility power outage.
When Utility power is restored, the ATS will re-transfer to
the utility source through normal timing sequences.
2.5 Faults
The RDC2/DC2 controller displays fault messages for
generator set warnings and shutdowns. Selected fault
messages are shown in Figure 2-3.
2.5.1 Warnings
2.4.3 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 3-8 and select Exercise Mode:
Unloaded Full.
2.4.4 Loaded Full-Speed Exercise (with
RXT only)
A loaded exercise starts the generator set, ramps up to
full speed, and then transfers the electrical load from the
utility source to the generator set. After 20 minutes, the
load is transferred back to the utility source. The engine
runs without load for 5 minutes or until cool, and then
shuts down automatically.
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 or DC2
controller, a Model RXT transfer switch must be
connected to the generator set. To set a loaded
exercise, follow the procedure in Figure 3-8 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.
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.
2.5.2 Shutdowns
Under a fault shutdown condition, the generator set
shuts down automatically and the controller displays a
fault message. The OFF LED flashes. In some cases,
the engine cooldown cycle runs before the engine shuts
down. See Figure 2-3.
Shutdown switches (such as the low oil pressure 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.
The generator set cannot be restarted until the fault
condition is corrected and the controller is reset. See
Section 2.5.4 for instructions to reset the controller after
a fault shutdown.
2.5.3 ATS Communication Errors
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.
2.4.5 Power Failure During Exercise
Cycle
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.
TP-6804 12/1124 Section 2 Generator Set Operation
2.5.4 Resetting the Controller after a
Fault Shutdown
3. Press Select. Confirm Clear Fault: NO is
displayed.
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 2-3 to identify and correct the fault condition
before proceeding. Contact an authorized
distributor/dealer for service, if necessary.
RDC2 Controller
Press the OFF button to reset the controller, or follow the
procedure below. See Figure 2-2.
1. While the fault message is displayed, press the
Select button to go to the Overview menu.
2. Press Select again. The active fault message is
displayed.
Fault Message
Overview ---->
1.2 h
4. Press the Down arrow button. Confirm Clear Fault:
YES is displayed.
5. Press the Select button to enter YES and clear the
fault.
6. Press the Select button to return to the overview
menu. The controller changes to OFF mode.
7. Press AUTO to put the generator set into automatic
mode.
DC2 Controller
Press the OFF button to clear the fault message on the
controller.
Fault Message
Confirm Clear
Fault: NO
Figure 2-2 Clearing a Fault on the RDC2 Controller
Press Up arrow button.
Confirm Clear
Fault: YES
tp6809
TP-6804 12/11 25Section 2 Generator Set Operation
Warning (W) or
Fault Message
AC Sens Lost W(1sec.)
Shutdown (SD)
SD (3 sec.) *
Condition Check
AC sensing lost. In Auto mode, generator output
AC sensing is lost. Starts 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.
Accy PwrOver
Warning
W Accessory Power Overload. An over current
fault (short circuit) on the accessory controller
power output.
ATS Com Error W ATS communication error. Warning is displayed
if ATS interface connection is lost.
See Section 2.5.3.
ATS PhaseRot W ATS phase rotation mismatch. Transfer switch
phase rotation does not match, ATS will not
transfer.
Aux Input SD * Auxiliary input. An optional customer-connected
input is closed. (Digital input from optional PIM.)
Batt Chg Flt W Battery charger fault. Input to PIM from an
external battery charger (not the built-in battery
charger).
Battery Voltage
High
W Engine starting battery voltage rises above 16
VDC for more than 10 seconds. Inhibited during
the engine crank cycle.
Clears when the battery voltage returns to an
acceptable level.
Battery Voltage
Low
W Engine starting battery voltage falls below 12.5
VDC for more than 90 seconds when the engine
is not running. Not operative during the engine
crank cycle.
Clears when the battery voltage returns to an
acceptable level.
Engine Oil
Pressure Low
SD * The LOP switch indicates low oil pressure for
more than 5 seconds. Function becomes active
30 seconds after crank disconnect (30 second
inhibit).
Note: The low oil pressure shutdown does not
protect against low oil level. Check the engine
oil level regularly as recommended in Section 5.
EngineSpeed
High
EngineSpeed
Low
SD * Engine speed exceeds 115% of the normal
running speed for more than 0.3 seconds.
SD * Engine speed drops below 85% of the normal
running speed for more than 3 seconds.
Exer Not Sch W Exercise not scheduled. No exercise is
scheduled on the controller.
Contact an authorized
distributor/dealer for service.
Contact an authorized
distributor/dealer for service.
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.
Check the battery rating and
condition.
Check the battery charger operation.
Charge or replace the battery.
Check for leaks in the lubrication
system.
Check the oil level and add oil if the
level is low.
Contact an authorized
distributor/dealer for service.
Reduce the load.
Contact an authorized
distributor/dealer for service.
See Section 3.6 or 4.5 for instructions
to set the exerciser.
* Engine cooldown runs before shutting down.
TP-6804 12/1126 Section 2 Generator Set Operation
Warning (W) or
Fault
Generator
Frequency High
Shutdown (SD)
Condition Check
SD * 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).
Generator
Frequency Low
SD * 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).
Generator
VoltageL1-L2
High
Generator
VoltageL1-L2
Low
SD * Generator voltage high. Output voltage exceeds
120% of the system nominal voltage for more
than 2 seconds.
SD * Generator voltage low. Output voltage falls
below 80% of the nominal system voltage for
more than 10 seconds.
Lo Crank Vlt W Low cranking voltage. Battery voltage falls
below 8 VDC for more than 6 seconds while the
starter is engaged.
Locked Rotor SD No engine rotation is sensed during cranking.
Shuts down 3 seconds after the fault is detected.
MainPwrOverL
Shutdown
SD Main power overload. An over current fault on
the 70 controller power output (short circuit).
Not in Auto W The generator set is not in Automatic (standby)
mode. Remote start and stop commands from a
transfer switch or remote switch will be ignored.
Contact an authorized
distributor/dealer for service.
Reduce the load and restart the
generator set.
Contact an authorized
distributor/dealer for service.
Contact an authorized
distributor/dealer for service.
Reduce the load and restart the
generator set.
Contact an authorized
distributor/dealer for service.
Charge or replace the battery.
Check the battery.
Check for loose connections.
Contact an authorized
distributor/dealer for service.
Contact an authorized
distributor/dealer for service.
Press AUTO to place the generator
set in Automatic mode, when
appropriate.
Over Crank SD Three unsuccessful starting attempts. Check the fuel supply, spark plug,
and battery.
Check for loose connections.
Contact an authorized
distributor/dealer for service.
Speed Sensor
Fault
* Engine cooldown runs before shutting down.
SD Engine speed sensor has failed or engine
stalled.
Contact an authorized
distributor/dealer for service.
Figure 2-3 Controller Fault Messages
TP-6804 12/11 27Section 2 Generator Set Operation
Notes
TP-6804 12/1128 Section 2 Generator Set Operation
Section 3 RDC2 Controller Operation
3.1 RDC2 Generator Set/ Transfer
Switch Controller
Model RESA generator sets are equipped with the
RDC2 generator set/transfer switch controller.
Model RESAL generator sets are equipped with the
DC2 controller. See Section 4 for DC2 controller
operation information.
The RDC2 controls the following power system
components:
D Model 14RESA or 20RESA generator set
D Model RXT Automatic Transfer Switch (ATS)
D Load Control Module (LCM)
D Programmable Interface Module (PIM)
The RDC2 controller features include:
1
2
GM77569
1. User Interface; see Figure 3-2
2. Service access (see Section 6.4)
D Two-line x 16 character backlit digital 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
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 load
3.2 Controls and Indicators
Figure 3-1 illustrates the RDC2 controller. See
Figure 3-2 for details of the controller’s user interface.
Figure 3-1 RDC2 Controls and Indicators
1
11
10
6789
GM77569
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. Building on generator power LED*
8. Building on utility power 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.
2
3
4
5
Figure 3-2 RDC2 User Interface
TP-6804 12/11 29Section 3 RDC2 Controller Operation
3.2.1 Controller Keypad
3.2.2 LED Indicators
The RUN, OFF,and AUTO buttons control the generator
set as described in Figure 3-3.
Use the Select, Up arrow, and Down arrow buttons to
navigate through the menus and change settings, if
necessary. See Section 2.3 for operation instructions.
LEDs above the RUN, OFF, and AUTO buttons indicate
the mode of operation as shown in Figure 3-4.
Power System LEDs indicate the status of the utility
power and the generator set, and indicate which source
is supplying power to the building (based on the position
of the RXT transfer switch). See Figure 3-2 and
Figure 3-4..
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 3-3 RDC2 Controller 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) or an ATS. Time delays operate as described in Section 2.3.
switch.
switch.
Figure 3-4 RDC2 Controller LED Operation
TP-6804 12/1130 Section 3 RDC2 Controller Operation
3.2.3 LCD Display
The controller is equipped with a two-line x 16 character
backlit digital display with adjustable contrast. When the
generator is running, the controller automatically scrolls
through the displays shown in Figure 3-5. When the
system is in AUTO, the screens shown in Figure 3-6 are
displayed.
When a fault or warning condition exists, the controller
will show the corresponding message. See Section 2.5
for more information about faults.
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 3.14,
Genset System Menu.
The display backlight turns off after about a minute of no
activity. The backlight turns on when a button is pressed
or when the generator set starts.
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 3.7 through 3.21 for
menu diagrams.
Active Alert
Genset Status
Running
Voltage: 240V
Freq: 60.0Hz
Engine: 123F
Oil Pressure: OK
Active Alert
Genset Status
Standby
Battery
12.3V
Engine Runtime:
12345.6 h
Date: 02DEC2011
Time: HR:MNpm
Next Exercise:
09:00p 09Dec2011
Battery
12.3V
Engine Runtime:
12345.6 h
Date: 02DEC2011
Time: HR:MNpm
Sample data shown.
Figure 3-6 Autopaging Displays, Automatic Mode
tp6804
Next Maintenance:
150 h or Mar2012
Sample data shown.
Figure 3-5 Autopaging Displays, Generator Running
TP-6804 12/11 31Section 3 RDC2 Controller Operation
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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
utility power to the generator set and disconnect
the battery .
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 3.6 for more detailed
instructions to set the exerciser or change the exercise
settings.
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 14.0 ±2% VDC voltage and maximum 2.5
amps to charge the battery.
The installer must connect 120 VAC/60Hz utility power
provided from the building on a breaker-protected circuit
for the built-in 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:
The following procedure explains how to change
settings. See Figure 3-7 for an example using the Date
and Time settings.
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.
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 Genset System menu is used for
this example. See Figure 3-9.
3. Press the Select button to enter the genset system
displays. See Figure 3-7.
4. Press the down arrow button to step through the
generator set system settings.
5. To change any of the genset system settings, 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 day,
month, and year can be adjusted.
8. Repeat steps 6 and 7 for each setting on the
screen.
9. Press the down arrow to step to the next screen.
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.
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.
TP-6804 12/1132 Section 3 RDC2 Controller Operation
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 3-9. 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:
05Dec2011
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:
03Jan2012
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. In the time format menu, press Select and then
press the up or down arrow button to change the
format, 12 hr. or 24 hr. Press Select to save the
displayed format.
Press: Display:
Date:
05Dec2011
5. Press the up or down arrow buttons to change the
year.
Press:
OR
Display:
Date:
05Dec2012
6. When the correct year is shown, press the Select
button. The year is saved and the next setting
(month) flashes.
Press: Display:
Date:
05Dec2012
7. Repeat steps 5 and 6, using the arrow and select
buttons to set the month and the date.
Figure 3-7 Changing Settings
12. Press the down arrow button. Return is
displayed.
Press: Display:
<-- -- Return
13. Press Select to return to the Date and Time
menu.
Press: Display:
D a t e -- -- >
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.
TP-6804 12/11 33Section 3 RDC2 Controller Operation
3.6 Setting the Exerciser
Set the exerciser to automatically run the generator set
for 20 minutes every week or every two weeks.
3.6.1 Setting the Exerciser at Controller
Power--up
When battery power is connected to the controller, you
will be prompted to set the date and time, and then to set
the 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. See Section 3.5 for
more detailed instructions to change settings on the
RDC2.
If the battery is disconnected and reconnected during
generator set maintenance or service, the time, date,
and exercise settings will need to be re-entered.
3.6.2 Changing the Exercise Settings
This section explains how to change the exercise
settings after the initial setup.
Follow the procedure below and see the flowchart in
Figure 3-8 to set the exercise time and date, mode, and
frequency.
7. Press the Select button. The setting flashes to
show that it can be changed. For example, HR
flashes to show that the hour can be changed.
8. Press the Up or Down arrow buttons to change the
setting.
9. Press the Select button to save the setting and
move to the next. For example, save HR setting
and move to MN.
10. Repeat steps 5 through 9 to change the next item
on the line until the desired settings are displayed.
11. Press Select to save after all settings have been
selected. Settings will stop flashing.
12. 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
Unloaded Cycle, Unloaded Full, or Loaded Full
(RXT ATS required) as shown in Figure 3-8.
Unloaded Cycle is recommended. See Sections
2.4.2 through 2.4.4 for information about the
exercise modes.
13. Set the exercise frequency (weekly or every two
weeks). Weekly exercises are recommended.
14. Press the down arrow button to step to the Return
menu. Press the Select button to return to the main
menu.
Procedure to Set the Exerciser
1. Press the AUTO button on the controller.
2. Press the Select button to go to the main menu.
SeeFigure3-9.
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 3-8.
5. Use the down arrow button to step to the Next
Exercise menu. If the exerciser is not set, No
Exercise Scheduled will be displayed.
6. Press and HOLD the Select button to enable
editing.
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 ATS,
refer to the transfer switch operation manual for
instructions.
Exerciser Reset
To reset the exerciser to run at a different day and/or
time or to change the exercise mode, follow the
procedure in Section 3.6.2 to change the exerciser
settings.
TP-6804 12/1134 Section 3 RDC2 Controller Operation
Genset -- -->
System
System Freq:
XX.X Hz
System Phase
System Volt
Battery V:
HOLD:
Next Exercise *
HR:MN PM MM/DD/YY
Exercise Mode:
Loaded
Exercise Freq:
Weekly
Language:
Contrast:
50
Next Exercise
HR:MN PM MM/DD/YY
HOLD:
Exercise Mode:
Unloaded Cycle/Unloaded
Full/ Loaded Full
HOLD:
Exercise Freq:
Weekly/Bi-Weekly
<-- -- Return
* If the exerciser has not been set, No Exercise Sch will be displayed.
Figure 3-8 Procedure to Set the Exerciser on the RDC2 Controller
TP-6804 12/11 35Section 3 RDC2 Controller Operation
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3.7 RDC2 Controller Menus
3.8 Main Menu
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.
Diagrams in the following sections show how to navigate
through the menus.
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
Overview ---->
1.2 h
Press the Select button once to bring up the main menu.
Overview is displayed. See Figure 3-9. 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 3-9.
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.
Press the Up and Down arrow buttons
to move between menus.
Press OFF or AUTO to exit the menus.
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 -- -->
* ATS configuration appears only if a Model RXT transfer switch is connected.
Figure 3-9 RDC2 Main Menu
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TP-6804 12/1136 Section 3 RDC2 Controller Operation
3.9 Overview Menu
Overview ---->
1.2 h
Active Alert
(if any)
3.10 Engine Metering Menu
The engine metering menu displays engine status
information as shown in Figure 3-11. This menu
displays status information only. No settings can be
changed from this menu.
Genset Status
Standby
Voltage: 240V
Freq: 60.0Hz
Engine: 123F
Oil Pressure: OK
Battery
12.3V
Engine Runtime:
12345.6 h
Date: 02DEC2011
Time: HR:MNpm
Engine ---->
Metering
Eng Speed:
3600 RPM
Oil Pressure:
Switch: Normal
Oil Temp:
Battery:
<---- Return
Figure 3-11 Engine Metering Menu
123 F
12.3 V
tp6810
Next Exercise:
09:00p 09Dec2011
Next Maintenance:
150 h or Mar2012
SW Version:
12.34
<-- -- Return
tp6804
Figure 3-10 Overview Menu
TP-6804 12/11 37Section 3 RDC2 Controller Operation
3.11 Generator Metering Menu
Voltage Calibration
The generator metering menu displays the generator
voltage and frequency. See Figure 3-12.
Generator ---->
Metering
Volts:
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 3-12.
123V
Figure 3-12 Generator Metering Menu
Frequency:
Reset
Calibration
<---- Return
12.3 Hz
Reset
Calib? No
Reset
Calib? Yes
tp6804
TP-6804 12/1138 Section 3 RDC2 Controller Operation
3.12 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 Kohler SiteTech 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:
20RESA
3.13 Genset Run Time Menu
The data shown in Figure 3-14 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 5, 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 5.2.5 for
instructions to reset the maintenance timer.
Genset S/N:
########
Controller S/N:
########
<---- Return
Figure 3-13 Generator Set Information Menu
tp6804
Genset ---->
Run Time
Eng Runtime:
12345.6 h
Eng Starts:
123456
Next Maintenance:
150 h or Mar2012
<---- Return
Figure 3-14 Generator Set Run Time Menu
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TP-6804 12/11 39Section 3 RDC2 Controller Operation
3.14 Genset System Menu
The genset system menu displays the system
information shown in Figure 3-15. 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
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.
Voltage Regulator (VR) Voltage Adj
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:
Single
System Battery:
12 V
Next Exercise
06:30p 15Dec2011
Exercise Mode:
Unloaded Variable
Use the Genset System menus to set the generator set
exerciser. Refer to Section 2.4 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:
50
<-- -- Return
tp6810
Figure 3-15 Genset System Menu
TP-6804 12/1140 Section 3 RDC2 Controller Operation
3.15 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.
Follow the safety precautions at the beginning of this
manuals. Use a voltmeter to measure the line-to-line
voltage and follow the instructions in Figure 3-16 to
calibrate the voltage readings.
ATS --- ->
Status
ATS Position:
Normal
Normal Status:
Not/Acceptable
Emerg. Status:
Standby
Voltage:
Frequency:
Reset
Calibration
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.
123V
12.3 Hz
Reset
Calib? No
<---- Return
Reset
Calib? Yes
Figure 3-16 ATS Status Menu, with Calibration
TP-6804 12/11 41Section 3 RDC2 Controller Operation
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3.16 ATS Configuration Menu
Note: The ATS Configuration menu appears only if a
Model RXT transfer switch is connected.
Use the ATS Configuration 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:
12.3 Hz
Normal Voltage:
12345.6 V
Emerg. Freq:
12.3 Hz
Emerg. Voltage:
12345.6 V
Emerg. Engine
Start: 3 sec
Transfer From
Normal:3sec
Transfer From
Emerg.: 120 sec
<---- Return
Figure 3-17 ATS Configuration Menu
tp6810
TP-6804 12/1142 Section 3 RDC2 Controller Operation
3.17 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 3-18.
3.18 Networking Information Menus
Date and
Time
Date:
02Dec2011
Time:
12:34pm
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 OnCuet Home Generator Management
System.
RBUS is a proprietary RS-485 communications
protocol.
The Networking Information menu leads to submenus
for network and RBUS communication settings.
Networking---->
Information
Networking---->
Status
Networking---->
Configuration
RBUS ---->
Information
Time Format:
12hr|24hr
<-- -- Return
To change the date and time, press the Select button
See Figure 3-7 for instructions.
Figure 3-18 Date and Time Menu
NS
See Figure 3-20.
NC
See Figure 3-21.
RB
See Figure 3-22.
tp6804
<---- Return
Figure 3-19 Networking Information Menu
TP-6804 12/11 43Section 3 RDC2 Controller Operation
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3.18.1 Networking Status Submenu
The Networking Status submenu contains settings for
OnCuet. See the OnCue Software Operation Manual
for information about the appropriate network settings
for OnCue. Changes to these settings are not typically
required.
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 3.18.2.
Networking---->
Information
Networking---->
Status
OnCue Status:
Connected
DHCP:
Enabled
IP Address:
123.456.789.123
Subnet Mask:
123.456.789.123
Gateway:
123.456.789.123
DNS 1:
123.456.789.123
Figure 3-20 Network Status Submenu
DNS 2:
123.456.789.123
Ethernet Status:
Disconnected
OnCue Server:
123.456.789.123
<---- Return
tp6804
TP-6804 12/1144 Section 3 RDC2 Controller Operation
3.18.2 Networking Configuration
Submenu (OnCue Password)
The networking Configuration menu includes settings
used for communication with the Kohlerr OnCuet
Home Generator Management System.
Password
For the initial OnCue setup, you will be required to reset
the OnCue password on the RDC2 controller, and then
enter it into the OnCue software. To reset the password,
follow the instructions in Figure 3-21.
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 system has been set up, the
connection will be lost. Enter the new password in
OnCuer to reconnect.
HOLD
Reset OnCue
Password? No
UP arrow for YES,
Down arrow for NO.
Figure 3-21 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: 1234567
New PW: 12345
tp6804
TP-6804 12/11 45Section 3 RDC2 Controller Operation
3.18.3 RBUS Information
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 3-23.
Net Cycle Time:
123ms
RD
Figure 3-22 RBUS Information Submenu
Module Timeouts:
1234
Module Errors:
1234
< ---- Return
tp6804
TP-6804 12/1146 Section 3 RDC2 Controller Operation
3.18.4 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)
From Figure 3-22:
R e m o t e -- -- >
Devices
The serial numbers for the PIM and LCM are printed on
the circuit boards inside the enclosures.
S/N: XXXXXXXXX
<<*DeviceType*>>
Module Status:
Connected
Comm. Errors:
12345
Comm. Timeouts:
12345
Module ID:
12
Firmware Ver.:
122
(Dis)Connected:
MM/DD/YY 12:12
S/N: XXXXXXXXX
<<*DeviceType*>>
Connected: Displays the date and time that the
device was connected.
Disconnected: Displays the last date and time of
successful communication.
<---- Return
Return ---->
Figure 3-23 Remote Devices Submenu
TP-6804 12/11 47Section 3 RDC2 Controller Operation
tp6804
3.19 Programmable Interface
Module (PIM) Status Menu
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 OnCuet Home Management System can
be used to turn outputs on and off. See the OnCue
Software Operation Manual for instructions.
PIM
Status:
PIM 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 3-24 Programmable Interface Module (PIM) Status Menu
tp6810
TP-6804 12/1148 Section 3 RDC2 Controller Operation
3.20 Load Control Module (LCM)
Menus
The Load Control menu displays the status of the Load
Control Module (LCM) inputs and outputs, and allows a
test of the LCM 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 the LCM
operation, refer to TT-1574, provided with the LCM kit.
Load ---->
Control
Generator
Current: 123 %
Load ---->
Control 1
<---- Return
Test Outputs
Push Select
Input 1:
In/Active
Input 2:
In/Active
Output 1:
Add/Shed
Output 2:
Add/Shed
Output 3:
Add/Shed
Output 4:
Add/Shed
(blinking)
Output 5:
Add/Shed
Output 6:
Add/Shed
<---- Return
Figure 3-25 Load Control Module (LCM) Status Menu
TP-6804 12/11 49Section 3 RDC2 Controller Operation
tp6810
3.21 Event Log
6. Press the Select button to exit the 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.
The time and date for notices (I) are not stored in the
controller.
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.
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
Press Select button at any time to
return to the main menu.
time HR:MN
event number, W/S/I, engine hours
event name
Date MO/DA/YEAR
time HR:MN
event number, W/S/I, engine hours
event name
tp6810
Figure 3-26 Event Log
TP-6804 12/1150 Section 3 RDC2 Controller Operation
Section 4 DC2 Controller Operation
4.1 DC2 Generator Set/ Transfer
Switch Controller
Model RESAL generator sets are equipped with the
DC2 generator set/transfer switch controller.
Model RESA generator sets are equipped with the
RDC2 generator set/transfer switch controller. See
Section 3 for RDC2 controller operation information.
The DC2 controls the following power system
components:
D Model 14RESAL or 20RESAL generator set
D Model RXT Automatic Transfer Switch (ATS)
D Load Control Module (LCM)
D Programmable Interface Module (PIM)
DC2 controller features include:
1
1. User Interface
2. Service access (see Section 6.4)
Figure 4-1 DC2 Controls and Indicators
2
GM77569
D Two-line x 16 character backlit digital display with
adjustable contrast
D OFF, AUTO, RUN, and EXERCISE generator set
control buttons
4.2 Controls and Indicators
Figure 4-1 illustrates the DC2 controller. See Figure 4-2
for details of the controller’s user interface.
1
1. 2-line LCD display
2. EXERCISE button
3. RUN button and LED
4. OFF button and LED
5. AUTO button and LED
Figure 4-2 DC2 User Interface
4 35 2
GM77569
TP-6804 12/11 51Section 4 DC2 Controller Operation
4.2.1 Controller Keypad
4.2.2 LED Indicators
The RUN, OFF,and AUTO buttons control the generator
set as described in Figure 4-3.
LEDs above the RUN, OFF, and AUTO buttons indicate
the mode of operation as shown in Figure 4-4.
Use the EXERCISE button to set the exerciser on the
DC2 controller. See Section 4.5 for instructions to set
the exerciser.
Note: A personal computer (laptop) with Kohlerr
SiteTecht software is required for changing
settings on the DC2 controller.
Button Button Function
RUN Press to start the generator set. The engine start time delay is ignored.
The software version and engine model are displayed briefly when RUN is pressed.
OFF Stops the generator set. The cooldown time delay is ignored.
During the engine crank cycle, pressing OFF will stop the crank cycle.
Press to clear faults and reset the controller.
Press and hold to access the event log.
AUTO Press to place the generator set in Automatic (standby) mode.
Press to exit the event log.
Press and hold AUTO and OFF to reset the maintenance timer.
EXERCISE When the controller is in AUTO mode, press to set the exerciser. See Section 4.5.
When the controller is OFF, press and hold to reset the OnCue password. See Section 4.8.
Figure 4-3 DC2 Controller Pushbutton Operation
LED LED Indication Description
RUN RUN LED is on. Generator set is running. Remote start and stop commands are ignored.
OFF
AUTO AUTO LED is on. Automatic (standby) mode. Generator set will respond to engine start and
OFF LED lights for 2
seconds, then flashes
every 2 seconds.
In Auto mode, OFF LED
flashes quickly to indicate
a fault shutdown.
Generator set and controller are off. Remote start/stop commands have no
effect. The exercise cycle will not run.
Attention required. Identify and correct the fault condition before resetting the
controller.
stop commands from the controller (for example, exercise start and stop
commands) or an ATS. Time delays operate as described in Section 2.3.
Figure 4-4 DC2 Controller LED Operation
TP-6804 12/1152 Section 4 DC2 Controller Operation
4.2.3 LCD Display
The controller is equipped with a two-line x 16 character
backlit digital display with adjustable contrast. When the
generator set is running, the messages shown in
Figure 4-5 are displayed. When the system is in AUTO,
the LCD display steps through the status messages
shown in Figure 4-6.
Active Alert
(if any)
Genset State
Standby
When a fault or warning condition exists, the controller
will show the corresponding message. See Section 2.5
for more information on fault and warning messages.
The display backlight turns off after about a minute of no
activity. The backlight turns on when a button is pressed
or when the generator set starts.
Active Alert
(if any)
Running
ATS: Normal *
Voltage: 240V
Freq: 60.0Hz
Engine: 123F
Oil Pressure: OK
Battery 12.3V
Runtime: 12345.6 h
Next Exercise:
7d 6h 42m
Next Maint:
123h or 12months
OnCue Status:
Disconnected
Sample data shown.
[ OnCue status is displayed only if OnCue password has
been reset.
Figure 4-6 Status Displays, Generator in Standby
4.3 Controller Power
Battery 12.3V
Runtime: 12345.6 h
Next Exercise:
7d 6h 42m
OnCue Status:
Disconnected [
Sample data shown.
* Model RXT ATS required
[ OnCue status is displayed only if OnCue password has
been reset.
Figure 4-5 Status Displays, Generator Running
The DC2 controller is powered by the generator set
engine starting battery.
Note: To disconnect controller power, disconnect the
utility power to the generator set and disconnect
the battery (negative lead first).
4.4 Battery Charging
The controller includes a built-in battery charger to
maintain the engine starting battery. The DC2 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 120 VAC/60Hz utility power
provided from the building on a breaker-protected circuit
for the built-in battery charger. See the Installation
Manual for instructions to connect power.
TP-6804 12/11 53Section 4 DC2 Controller Operation
4.5 Exercise
4.5.3 Exerciser Reset
The DC2 controller can be set to automatically run the
generator set at the same time and day each week.
Exercising the generator set weekly is required to keep
the engine and alternator in good operating condition.
A laptop computer with Kohlerr SiteTecht software
can be used to change the exercise frequency to every
two weeks. Use a USB cable to connect the controller to
the computer and see TP-6701, SiteTech Operation
Manual for instructions.
4.5.1 Exercise Modes
Unloaded Cycle or Loaded Full-Speed exercises can be
set from the DC2 controller. The Unloaded Cycle
exercise mode is the default exercise mode. A Model
RXT transfer switch is required for the Loaded
Full-Speed exercise mode. See Section 2.4 for more
information about the exercise modes.
A laptop computer with Kohlerr SiteTecht software
can be used to change the exercise mode to Unloaded
Full Speed.
To reset the exerciser to run at a different day and/or
time, follow the procedure in Section 4.5.2 to enter the
new exerciser settings. The old settings will be replaced
by the new time and day.
4.6 Event Log
The event log displays up to 10 controller faults and
notices, starting with the most recent event. Events are
numbered 1--10, with 1 being the most recent. Each
event is displayed with the date and time of the event,
the number of the event, a letter 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. See Figure 4-7.
Hold
Any Screen
OFF
Event number, W/S/I, engine hours
Event name
Press OFF
4.5.2 Setting the Exerciser
Set the exerciser to automatically run the generator set
for 20 minutes every week. Follow the procedure below
to set the exerciser.
Procedure to Set the Exerciser
1. Press AUTO. Verify that the AUTO LED is on and
Utility power is available.
2. Press the exercise button to start an unloaded
exercise.
3. If a loaded exercise is required, press the Exercise
button again within 5 seconds.
4. After 5 seconds, the generator begins its crank
cycles. During the crank cycles, the number of the
crank cycle is displayed. No button presses are
acknowledged during the crank cycles.
5. The generator runs through the exercise cycle
described in Section 2.4.2. The controller monitors
the system during the unloaded exercise as
described in System Diagnostics.
Event number, W/S/I, engine hours
Event name
Press AUTO button at any time to exit the event log.
Figure 4-7 Event Log
Procedure to View Event Log
1. Press the OFF button. The controller must be OFF
to display the event log.
2. Press and hold the OFF button until the first event
appears on the display.
3. Press OFF to step through the other events.
4. To exit the Event Log, hold the OFF button or press
the AUTO button.
tp6804
6. After 20 minutes, the engine stops automatically.
Theexercisetimeissettothetimetheexercisebuttonis
pressed. An unloaded or loaded exercise, as selected
above, will occur at the same time every seven days.
TP-6804 12/1154 Section 4 DC2 Controller Operation
4.7 Maintenance Timer
4.8 OnCue Password
The maintenance timer keeps track of the time until the
next recommended maintenance according to the
maintenance schedule for the 14RESAL or 20RESAL
generator set. Reset the maintenance timer after
changing the oil and performing the other maintenance
tasks recommended in Section 5.
To reset the maintenance timer:
1. Press and hold the OFF and AUTO buttons
together until Maintenance Timer Reset is
displayed.
2. Release the OFF and AUTO buttons.
To set the OnCue password on the DC2 controller,
1. Press the OFF button and verify that the generator
set is not running.
2. Press and hold the Exercise button until Press
Again to Reset OnCue PW is displayed.
3. Release the Exercise button and press it again
within 5 seconds.
Note: If the Exercise button is not pressed within 5
seconds, the controller exits the password
reset mode.
4. The genset serial number and new password (PW)
will be displayed for 10 seconds. Record the
password for entry into the OnCue program.
TP-6804 12/11 55Section 4 DC2 Controller Operation
Notes
TP-6804 12/1156 Section 4 DC2 Controller Operation
Section 5 Scheduled Maintenance
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.
WARNING
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.
5.1 Scheduled Maintenance
Refer to the following service schedules and the runtime
hours displayed on the controller display to schedule
routine maintenance. Intervals are shown in hours of
operation and/or time intervals (i.e. weekly, monthly,
quarterly, etc.) Have an authorized distributor/dealer
service the generator set at the designated intervals in
the service schedule for the life of the generator set.
Service units subject to extreme weather, long operating
hours, or dusty or dirty conditions more frequently.
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
Moving parts.
Contact an authorized distributor/dealer for parts.
TP-6804 12/11 57Section 5 Scheduled Maintenance
5.1.1 Service Schedule, 14RESA/RESAL Models
Procedure
See
System Component or Procedure
Section
Fuel
Flexible lines and connections X R Quarterly
Main tank supply level X Weekly
Fuel piping X Yearly
Lubrication
Oil level
Crankcase breather hose X Yearly or 500 hours
Change oil X Yearly or 100 hours
Replace filter X Yearly or 200 hours
Cooling
Air ducts, louvers X X Yearly
Exhaust Line
Leakage X X Weekly
Insulation, fire hazards X Yearly
Obstructions or combustible materials near exhaust
outlet
DC Electrical System
Battery charger operation, charge rate (if equipped) X Monthly
Remove corrosion, clean and dry battery and rack X X Yearly
Clean and tighten battery terminals and inspect
boots
Battery electrolyte level and specific gravity * X Yearly
5.2
5.5
5.6
5.7
AC Electrical System
Tighten control and power wiring connections X Yearly
Remote control system, if equipped X Monthly
Visible wear or damage X Quarterly
Wire abrasions where subject to motion X X Six Months
Wire-cable insulation condition X 3 Years or 500 hours
Engine and Mounting
Visible wear or damage X Weekly
Air cleaner and precleaner service [
Spark plugs 5.3 X Yearly or 300 hours
Replace stepper motor coupling and bushing D 500 hours
5.4 R Yearly or 100 hours
Generator
Visible wear or damage X Quarterly
Exercise generator set X Weekly
Brushes and collector ring D D Yearly
Measure and record resistance readings of
windings with insulation tester (Meggerr,with
SCR assembly or rectifier and load leads
disconnected) *
General Condition of Equipment
Evidence of vibration, leakage, excessive noise,
temperature, or deterioration
Interior of sound enclosure X X Quarterly
* Not necessary for maintenance-free batteries.
[ Service more frequently under extremely dusty/dirty conditions.
Meggerr is a registered trademark of Biddle Instruments.
Visually
Inspect
XAction
D Authorized distributor/dealer only
R Replace as necessary
Check Change Clean Test
X X
X Weekly
X X Yearly
D 3 Years
X X X Weekly
Frequency
8 hours or
before use
TP-6804 12/1158 Section 5 Scheduled Maintenance
5.1.2 Service Schedule, 20RESA/RESAL Models
Procedure
See
System Component or Procedure
Section
Fuel
Flexible lines and connections X R Quarterly
Main tank supply level X Weekly
Fuel piping X Yearly
Lubrication
Oil level X 8 hours or
Change oil X Yearly or 150 hours
Replace filter X Yearly or 150 hours
Crankcase breather hose X Yearly or 500 hours
Oil cooler X X Yearly or 100 hours
Cooling
Air ducts, louvers X X Yearly
Exhaust System
Leakage X X Weekly
Insulation, fire hazards X Yearly
Obstructions or combustible materials near
exhaust outlet
DC Electrical System
Battery charger operation, charge rate X Monthly
Remove corrosion, clean and dry battery and
rack
Clean and tighten battery terminals and inspect
boots
Battery electrolyte level and specific gravity * X Yearly
5.2
5.5
5.6
5.7
AC Electrical System
Tighten control and power wiring connections X Yearly
Remote control system, if equipped X Monthly
Visible wear or damage X Quarterly
Wire abrasions where subject to motion X X Six Months
Wire-cable insulation condition X 3 Years or 500 hours
Engine and Mounting
Visible wear or damage X Weekly
Air cleaner service [
Spark plugs 5.3 150 300 Yearly or hours shown
Replace stepper motor coupling and bushing D 500 hours
5.4 150 300 Yearly or hours shown
Generator
Visible wear or damage X Quarterly
Exercise generator set W Weekly
Brushes and collector ring D D Yearly
Measure and record resistance readings of
windings with insulation tester (Meggerr,with
SCR assembly or rectifier and load leads
disconnected)
General Condition of Equipment
Evidence of vibration, leakage, deterioration,
unusual or excessive noise or temperature
Interior of sound enclosure X X Quarterly
* Not necessary for maintenance-free batteries.
[ Service more frequently under extremely dusty/dirty conditions.
Meggerr is a registered trademark of Biddle Instruments.
Visually
Inspect
Check Change Clean Test
before each use
X
X X
X X
D 3 Years
X X X Weekly
XAction
D Authorized distributor/dealer only
R Replace as necessary
Frequency
Weekly
Yearly
Yearly
TP-6804 12/11 59Section 5 Scheduled Maintenance
5.2 Lubrication System
5.2.3 Engine Oil Recommendation
See the service schedules in Section 5.1 for oil change
and oil filter replacement intervals. See the service
views in Section 1.8 for the oil drain, oil check, oil fill, and
oil filter locations.
5.2.1 Low Oil Pressure Shutdown
The low oil pressure (LOP) shutdown feature protects
the engine against internal damage if the oil pressure
drops below a minimum pressure because of oil pump
failure or other malfunction.
Note: The LOP shutdown feature does not protect
against damage caused by operating when the
oil level is low; it is not a low oil level shutdown.
Check the oil level regularly, and add oil as
needed.
5.2.2 Oil Check
The generator set is shipped with oil. Before operating
the generator set, check the engine oil in the crankcase.
SeeFigure5-1.
Maintain the oil level at or near, not over, the full mark on
the dipstick. Add 5W-30 synthetic oil when the oil level is
low.
Check the oil level before each use. For extended
operation, check the oil level every 8 hours. Do not
check the oil level when the generator set is running.
Shut down the generator set and wait several minutes
before checking the oil.
Use 5W-30 API (American Petroleum Institute) Service
Class SG, SH, or SJ synthetic oil. Synthetic oil oxidizes
and thickens less than other oils and leaves the engine
intake valves and pistons cleaner.
5.2.4 Oil Change Procedure
Note: Dispose of all waste materials (engine oil, fuel,
filter, etc.) in an environmentally safe manner.
Drain the oil while it is still warm.
1. Drain the oil.
a. Press the OFF button on the generator set
controller.
b. Disconnect the utility power to the generator
set.
c. Disconnect the generator set engine starting
battery, negative (--) lead first.
d. Remove the housing side panel.
e. Clean the area around the dipstick and oil fill
cap.
f. Remove the oil drain hose from its retaining
clip. Remove the cap from the oil drain hose
and lower the hose into an oil collection
container.
g. Open the oil drain valve on the engine.
h. Remove the dipstick and oil fill cap. Allow time
for the engine oil to drain completely.
Figure 5-1 Oil Check (typical)
6515
i. Close the oil drain valve. Replace the cap on
the oil drain hose. Replace the oil drain hose in
its retaining clip.
j. Replace the dipstick.
2. Replace the oil filter.
a. Clean the area around the oil filter. Remove the
oil filter by rotating it counterclockwise with an
oil filter wrench.
b. Clean the gasket sealing surface of the oil filter
adapter.
c. Apply a light coat of clean oil to the rubber seal
of the new oil filter.
d. Install the new oil filter following the instructions
provided with the filter.
TP-6804 12/1160 Section 5 Scheduled Maintenance
3. Fill with oil.
14/20RESAL (DC2):
a. Fill the engine to the F mark on the dipstick. The
engine oil capacity is shown in Figure 5-2. See
Section 5.2.3, Engine Oil Recommendation,
for oil selection.
Generator Set Model Oil Capacity, L (qt.)
14RESA/RESAL 1.9 (2.0)
20RESA/RESAL 2.8 (3.0)
Figure 5-2 Engine Oil Capacity
b. Reinstall the dipstick and the oil fill cap.
c. Reconnect the generator set engine starting
battery, negative (--) lead last.
d. Reconnect the utility power to the generator
set.
e. Press the RUN button on the generator set
controller. The generator set will start.
f. Run the generator set for a minute to allow the
oil pressure to reach operating range.
1. Press and hold the OFF and AUTO buttons
together until Maintenance Timer Reset is
displayed.
2. Release the OFF and AUTO buttons.
5.2.6 Oil Cooler 20RESA/RESAL
Inspect and clean the oil cooler at the intervals indicated
in the service schedule. The oil cooler must be kept free
of debris.
See Figure 5-3 for the oil cooler location. The oil cooler
is located under the No. 2 cylinder shroud. Remove the
top mounting screw and loosen the two side screws,
then lift off the cylinder shroud.
Clean the outside of the oil cooler fins with a brush or
with compressed air.
g. Stop the generator set, wait 1 minute, and then
recheck the oil level. Add oil to bring the level
up to the F mark on the dipstick.
4. Check for leaks.
a. Check for oil leaks.
b. Fix leaks and recheck the oil level.
c. Reinstall the housing side panel.
5. Reset the maintenance timer on the controller.
5.2.5 Resetting the Maintenance Timer
14/20RESA (RDC2):
1. In the Overview menu, step down to the Next
Maintenance screen.
2. Press the Select button.
3. Press the Up arrow button so that Reset Maint
Timer? Yes is displayed.
1. Oil cooler
Figure 5-3 Oil Cooler Location
1
62 590 01
4. Press the Select button. The next maintenance
interval and date will be displayed.
TP-6804 12/11 61Section 5 Scheduled Maintenance
5.3 Spark Plugs
5.4 Air Cleaner Service
Reset the spark plug gap or replace the plugs with new
plugs as necessary.
1. Clean the area around the base of the spark plug to
keep dirt and debris out of the engine.
2. Remove the spark plug and check its condition.
Replace the spark plug if it is worn or if its reuse is
questionable.
3. Check the spark plug gap using a wire feeler
gauge. See Figure 5-4 for the recommended
spark plug gap. Adjust the gap by carefully bending
the ground electrode. See Figure 5-5 and
Figure 5-6.
4. Reinstall the spark plug into the cylinder head.
Torque the spark plug to 24.4--29.8 Nm
(18--22 ft. lb.)
Generator Set Model Spark Plug Gap
14/20RESA/RESAL 0.76 mm (0.030 in.)
Figure 5-4 Spark Plug Gap
5.4.1 Air Cleaner, 14RESA/RESAL
Models
The engine has a replaceable high-density paper air
cleaner element with an oiled foam precleaner. See
Figure 5-7.
1
2
3
4
5
6
Figure 5-5 Checking the Spark Plug Gap
Figure 5-6 Adjusting the Spark Plug Gap
1--514
1--511
7
586536
1. Cover knob
2. Air cleaner cover
3. Element cover nut
4. Element cover
5. Foam precleaner
6. Air cleaner element
7. Air cleaner base
Figure 5-7 Air Cleaner Components
Check for a buildup of dirt and debris around the air
cleaner system. Keep this area clean. Also check for
loose or damaged components. Replace all bent or
damaged air cleaner components.
Note: Operating the engine with loose or damaged air
cleaner components could allow unfiltered air
into the engine causing premature wear and
failure.
TP-6804 12/1162 Section 5 Scheduled Maintenance
Precleaner Service
7. Replace the element if it is dirty, bent, or damaged.
Use the following procedure to wash and oil the
precleaner as indicated in the service schedule. Wash
and oil the precleaner more often under extremely dusty
or dirty conditions.
1. Press the OFF button on the generator set
controller.
2. Disconnect the utility power to the generator set.
3. Disconnect the battery, negative (--) lead first.
4. Loosen the cover retaining knob and remove the
cover. Remove the precleaner from the paper
element. Wash the precleaner in warm water with
detergent. Rinse the precleaner thoroughly until all
traces of detergent are eliminated. Squeeze out
excess water (do not wring). Allow the precleaner
to air dry.
5. Saturate the precleaner with new engine oil.
Squeeze out all of the excess oil.
6. Reinstall the precleaner over the paper element.
7. Reinstall the air cleaner cover. Secure the cover
with the cover retaining knob.
8. Check the air cleaner base. Make sure it is secure
and not bent or damaged. Also check the element
cover for damage and fit. Replace all damaged air
cleaner components. Remove any loose dirt or
debris from the air cleaner base. Wipe the base
carefully so that no dirt drops into the intake throat.
Check the condition of the rubber seal on the air
cleaner stud and replace the seal if necessary.
9. Reinstall the paper element, precleaner, element
cover, element cover nut, and the air cleaner cover.
Secure the cover with the cover retaining knob.
10. Reconnect the utility power to the generator set.
11. Reconnect the generator set engine starting
battery, negative (--) lead last.
5.4.2 Air Cleaner, 20RESA/RESAL
Models
The engine is equipped with a replaceable, high density
paper air cleaner element. See Figure 5-8.
1
8. Reconnect the power to the battery charger.
9. Reconnect the generator set engine starting
battery, negative (--) lead last.
Paper Element Service
Use the following procedure to replace the paper
element at the intervals specified in the service
schedule. Replace the paper element more often under
extremely dusty or dirty conditions.
1. Press the OFF button on the generator set
controller.
2. Disconnect the utility power to the generator set.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
4. Loosen the cover retaining knob and remove the
cover.
5. Remove the element cover nut, element cover, and
the paper element with precleaner.
2
3
4
tp6515
1. Knobs (qty.2)
2. Cover
3. Paper element
4. Base
Figure 5-8 Air Cleaner Components
Check the air cleaner daily or before starting the engine.
Check for a buildup of dirt and debris around the air
cleaner system. Keep this area clean. Also check for
loose or damaged components. Replace all bent or
damaged air cleaner components.
6. Remove the precleaner from the paper element.
Note: Operating the engine with loose or damaged air
cleaner components could allow unfiltered air
Note: Do not wash the paper element or clean it
with pressurized air, as this will damage the
into the engine causing premature wear and
failure.
element.
TP-6804 12/11 63Section 5 Scheduled Maintenance
Paper Element Service
Replace the paper element at the intervals indicated in
the service schedule. See Section 5.1.2 for the service
schedule. See Figure 5-8 for the air cleaner
components.
1. Loosen the two cover retaining knobs and remove
the cover.
2. Remove the paper element.
3. Do not wash the paper element or use pressurized
air, as this will damage the element. Replace a
dirty, bent, or damaged element. Handle new
elements carefully; do not use if the sealing
surfaces are bent or damaged.
5.5 Cooling System
The engine fan draws cooling air through the openings
in the sides and end near the battery. The alternator fan
draws cooling air through openings on the side walls of
the enclosure. The cooling air mixes with the engine
exhaust and is discharged at the exhaust outlet. See the
service view in Section 1.8 for air intake and exhaust
locations. To prevent generator set damage caused by
overheating, keep the housing cooling inlets and outlets
clean and unobstructed at all times.
Note: Do not block the generator set cooling air inlets or
mount other equipment above them. Overheating
and severe generator damage may occur.
4. When servicing the air cleaner, check the air
cleaner base. Make sure it is secured and not bent
or damaged. Also, check the element cover for
damage or improper fit. Replace all damaged air
cleaner components.
Note: If any loose dirt or debris fell on the air cleaner
base when the element was removed, carefully
remove it and wipe the base clean. Be careful that
none of it drops into the intake throat.
5. Reinstall the paper element onto the air cleaner
base. Make sure the element is flat and properly
seated.
6. Install the air cleaner cover and secure with the two
retaining knobs.
7. When element replacement is necessary, order
genuine Kohler parts.
5.6 Exhaust System
Remove all combustible materials from the exhaust
location. Combustible materials include building
materials as well as natural surroundings. Keep dry field
grass, foliage, and combustible landscaping material a
minimum of 1.5 m (5 ft.) from the exhaust outlet.
Periodically inspect the exhaust system components for
cracks, leaks, and corrosion.
D Check for corroded or broken metal parts and replace
them as needed.
D Check that the exhaust outlet is clear.
TP-6804 12/1164 Section 5 Scheduled Maintenance
5.7 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.
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. Neveradd 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.
Refer to this section for general battery information and
maintenance. Also consult the battery manufacturer’s
instructions for battery maintenance.
All generator set models use a negative ground with a
12-volt engine electrical system. Consult the generator
set nameplate for the engine electrical system voltage.
Consult the generator spec sheet for battery capacity
recommendations for replacement purposes. Wiring
diagrams provide battery connection information. See
Figure 5-9 for typical battery connections.
1
2
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 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.
EZ-273000-J
1. To positive (+) terminal on starter solenoid.
2. To ground (--) terminal on or near starter motor.
Figure 5-9 12-Volt Engine Electrical System Single
Starter Motor, Typical Battery Connection
Clean the battery and cables and tighten battery
terminals using the service schedule recommendations.
To prevent corrosion, maintain tight, dry electrical
connections at the battery terminals. To remove
corrosion from battery terminals, disconnect the cables
from the battery and scrub the terminals with a wire
brush. Clean the battery and cables with a solution of
baking soda and water. After cleaning, flush the battery
and cables with clean water and wipe them with a dry,
lint-free cloth.
After reconnecting the battery cables, coat the battery
terminals with petroleum jelly, silicone grease, or other
nonconductive grease.
TP-6804 12/11 65Section 5 Scheduled Maintenance
5.8 Storage Procedure
5.8.3 Cylinder Lubrication
Perform the following storage procedure before
removing the generator set from service for three
months or longer. Follow the engine manufacturer’s
recommendations for storage, if available.
Note: Run the generator set monthly whenever
possible.
5.8.1 Lubricating System
1. Operate the generator set until it reaches operating
temperature, or about 15 minutes.
2. Stop the generator set.
3. While the engine is still warm, drain the engine
lubrication oil from the engine crankcase.
4. Refill engine crankcase with oil. See Section 5.2.3
for oil recommendations.
5. Run the generator set for a few minutes to
distribute the clean oil.
6. Stop the generator set.
1. Remove the spark plugs.
2. Pour one tablespoon of engine oil into each spark
plug hole. Install the spark plugs and ground the
spark plug leads. Do not connect the leads to the
plugs.
3. Crank the engine two or three revolutions to
lubricate the cylinders.
5.8.4 Exterior Preparation
1. Clean the exterior surface of the generator set.
2. Seal all openings in the engine with nonabsorbent
adhesive tape.
3. Mask all areas to be used for electrical contact.
4. Spread a light film of oil over unpainted metallic
surfaces to prevent rust and corrosion.
5.8.5 Battery
Perform battery storage last.
5.8.2 Fuel System
1. Start the generator set.
2. With the generator set running, shut off the gas
supply.
3. Run the generator set until the engine stops.
4. Press the OFF button on the generator set
controller.
1. Press the OFF button on the generator set
controller.
2. Disconnect the battery, negative (--) lead first.
3. Clean the battery.
4. Place the battery in a warm, dry location.
5. Connect the battery to a float/equalize battery
charger, or charge the battery monthly using a
trickle charger. Follow the battery charger
manufacturer’s recommendations.
TP-6804 12/1166 Section 5 Scheduled Maintenance
Section 6 Troubleshooting
6.1 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.
6.2 Fault Messages
The RDC2/DC2 controller displays fault messages to
aid in troubleshooting. Selected fault messages and
recommended checks are listed in Figure 2-3.
Identify and correct the cause of the fault condition.
Then reset the controller after a fault shutdown. See
Section 2.5.4.
6.3.2 Line Circuit Breaker
The line 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.
6.3.3 Auxiliary Winding Circuit Breaker
A resettable circuit breaker protects the alternator. The
circuit breaker is located in the controller’s service
access area. See Figure 6-1.
6.4 Controller Service Access
The alternator winding circuit breaker is accessible from
the front of the controller. Remove the service access
door to reach the circuit breaker. See Figure 6-1.
A USB port is also located in the service access area.
Some controller settings can be adjusted using a laptop
computer with Kohler SiteTech software. Use a USB
cable with a mini-B connector to connect the controller to
your PC. See TP-6701, SiteTech Software Operation
Manual, for more information.
6.3 Circuit Protection
If the generator set circuit breaker trips repeatedly,
contact an authorized Kohler distributor/ dealer for
service.
6.3.1 Controller Internal Circuit
Protection
The controller is equipped with internal circuit
protection. A fault message, Accy PwrOver Warning or
MainPwrOverL Shutdown, is displayed if this internal
protection is activated. Press OFF to reset. Contact an
authorized Kohler distributor/ dealer for service.
1
1. USB port (mini-B)
2. Alternator winding circuit breaker
Figure 6-1 Controller Service Access (cover
removed)
2
GM
TP-6804 12/11 67Section 6 Troubleshooting
6.5 Troubleshooting
Figure 6-2 contains generator set troubleshooting, diagnostic, and repair information. Check for loose connections
before replacing parts.
Problem Possible Cause Corrective Action
Controller
display
backlight is off.
Controller
displayisoff.
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.
Backlight turns off after about 1 minute with no
activity.
Low or no battery voltage. Check connections.
Battery weak or dead. Recharge or replace the battery.
Battery connections reversed or poor. Check the connections.
Fault shutdown. Check the controller display for fault messages. See
Generator set in the OFF mode. 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.
Line circuit breaker in the OFF position. Place the circuit breaker in the ON position.
Line circuit breaker tripping because of
overload.
Line circuit breaker tripping because of short
circuit.
Auxiliary winding circuit breaker tripped. Reset the circuit breaker (located in controller’s service
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,
Auxiliary winding circuit breaker tripped. Reset the circuit breaker (located in controller’s service
Fault shutdown. Check the controller display for fault messages. See
Generator set in the OFF mode. Press the RUN button to start the engine or press AUTO
Remote stop command received from a remote
switch, ATS, or OnCue.
Engine malfunction. Contact an authorized Kohler distributor/dealer.
Backlight will turn on when a button is pressed or the
generator set starts.
Check generator set battery. See Figure 6-2.
Section 2.5. Correct the fault condition and reset the
controller.
to allow remote starting.
necessary.
Reduce the load on the generator set.
Contact an authorized Kohler distributor/dealer for
service.
access area). Contact an authorized Kohler
distributor/dealer for service if breaker trips repeatedly.
necessary.
contact an authorized Kohler distributor/dealer.
access area). Contact an authorized Kohler
distributor/dealer for service if breaker trips repeatedly.
Section 2.5. Correct the fault condition and reset the
controller.
to allow remote starting.
Check the remote switch position. Check OnCue.
Figure 6-2 General Troubleshooting Chart
TP-6804 12/1168 Section 6 Troubleshooting
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
blk. htr. block heater
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
analog to digital converter
drawing
temperature
Institute
Institute (formerly American
Standards Association, ASA)
suggested
Mechanical Engineers
Materials
charging
(engine)
cfm cubic feet per minute
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
2
E
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)
substrate (semiconductor)
Association
Laboratories
Laboratories
e. V. (also Deutsche Industrie
Normenausschuss)
electrically-erasable
programmable read-only
memory
engine control module
Association
Association
Agency
engineered special
exh. exhaust
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)
K kelvin
kA kiloampere
KB kilobyte (2
KBus Kohler communication protocol
kg kilogram
ground
engine temp.
conditioning
Commission
Electronics Engineers
O inches of water
2
Standardization
10
bytes)
TP-6804 12/11 Appendix 69
2
kg/cm
kgm kilogram-meter
kg/m
kilograms per square
centimeter
3
kilograms per cubic meter
kHz kilohertz
kJ kilojoule
km kilometer
kOhm, kΩ 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
3
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
wa
LWL low water level
sound power level, A weighted
LWT low water temperature
m meter, milli (1/1000)
M mega (10
3
m
3
m
3
m
units), male
cubic meter
/hr. cubic meters per hour
/min. cubic meters per minute
6
when used with SI
mA milliampere
man. manual
max. maximum
MB megabyte (2
20
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, mΩ milliohm
MOhm, MΩmegohm
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
μF 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 feet 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
V volt
VAC volts alternating current
VAR voltampere reactive
VDC volts direct current
VFD vacuum fluorescent display
VGA video graphics adapter
VHF very high frequency
W watt
WCR withstand and closing rating
w/ with
WO write only
w/o without
wt. weight
xfmr transformer
TP-6804 12/1170 Appendix
TP-6804 12/11
E 2011 by Kohler Co. A ll rights reserved.
KOHLER CO. Kohler, Wisconsin 53044
Phone 920-457-4441, Fax 920-459-1646
For the nearest sales/service outlet in the
US and Canada, phone 1-800-544-2444
KohlerPower.com
Kohler Power Systems
Asia Pacific Headquarters
7 Jurong Pier Road
Singapore 619159
Phone (65) 6264-6422, Fax (65) 6264-6455
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