Page 1
Operator Manual
Generator Set
HDKAW (Spec A)
English 11−2009 A026M828 (Issue 3)
Page 2
California
Proposition 65 Warning
Diesel engine exhaust and some of its constituents are known
to the State of California to cause cancer, birth defects, and
other reproductive harm.
Page 3
Table of Contents
SECTION PAGE
Table of Contents i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY PRECAUTIONS iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. INTRODUCTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About this Manual 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nameplate 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Obtain Service 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Emissions Compliance 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Genset 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. OPERATION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Recommendations 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil Recommendations 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Recommendations 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Batteries 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Panel 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Panel 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pre-Start Checks 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Priming the Fuel System 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Starting 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Stopping 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Starting and Stopping 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading the Genset 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting Circuit Breakers 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to Utility Power 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating in Cold Weather 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating in Hot Weather 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating at High Altitude 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating in Dusty Environments 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Breaking In a New Engine 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercising the Genset 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storing the Genset 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SECTION PAGE
3. PERIODIC MAINTENANCE 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Inspection 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Engine Oil Level 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing Engine Oil and Oil Filter 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintaining the Battery and Battery Connections 3-4. . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Air Filter Element 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning the Spark Arrestor 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining/Replacing the Fuel Filter 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintaining the Engine Cooling System 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. TROUBLESHOOTING 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting With Table 4-1 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault Code Blinking 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restoring Fault Code Blinking 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. SPECIFICATIONS 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6. MAINTENANCE RECORD 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Page 5
SAFETY PRECAUTIONS
Thoroughly read the OPERATOR’S MANUAL
before operating the genset. Safe operation and
top performance can only be obtained when
equipment is properly operated and maintained.
The following symbols in this manual alert you to
potential hazards to the operator, service person
and equipment.
DANGER
that will result in severe personal injury or
death.
WARNING
practice that can result in severe personal injury or death.
CAUTION
practice that can result in personal injury or
equipment damage.
Electricity, fuel, exhaust, moving parts and batteries present hazards which can result in severe personal injury or death.
When equipped with an integral or add-on Automatic Generator Starting System (AGS) control,
exhaust carbon monoxide (CO), electric shock, and
moving parts hazards are possible due to unexpected starting. Turn off AGS whenever performing
maintenance or service, when the vehicle is stored
between uses, is awaiting service, or is parked in a
garage or other confined area.
alerts you to an immediate hazard
alerts you to a hazard or unsafe
alerts you to a hazard or unsafe
• The exhaust system must be installed in accordance with the genset Installation Manual.
• Engine cooling air must not be used for heating
the vehicle.
GENERATOR VOLTAGE IS DEADLY
• Disable the automatic genset starting feature
(AGS) of an inverter-charger or other automatic starting device before servicing the genset to
avoid electric shock from an unexpected start.
• Generator electrical output connections must
be made by a trained and experienced electrician in accordance with applicable codes.
• The genset must not be connected to shore
power (utility). Back-feed to shore power can
cause electrocution and damage to equipment. An approved switching device must be
used to prevent interconnections.
• Use caution when working on live electrical
equipment. Remove jewelry, make sure clothing and shoes are dry, stand on a dry wooden
platform or rubber insulating mat and use tools
with insulated handles.
DIESEL FUEL IS COMBUSTIBLE
• Do not smoke or turn electrical switches ON or
OFF where fuel fumes are present or in areas
sharing ventilation with fuel tanks or equipment. Keep flames, sparks, pilot lights, arcproducing equipment and all other sources of
ignition well away.
ENGINE EXHAUST IS DEADLY
• Inspect for exhaust leaks at every startup and
after every eight hours of running.
• Learn the symptoms of carbon monoxide poisoning in the genset Operator’s Manual.
• Never sleep in the vehicle while the genset is
running unless the vehicle is equipped with a
working carbon monoxide detector.
• Do not operate the genset when the vehicle is
parked in a confined space, such as a garage.
• Disable the automatic genset starting feature
(AGS) of an inverter-charger or other automatic starting device before storing the vehicle or
parking it in a garage or other confined space.
• Fuel lines must be secured, free of leaks and
separated or shielded from electrical wiring.
MOVING PARTS CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH
• Disable the automatic genset starting feature
(AGS) of an inverter-charger or other automatic starting device before servicing the genset to
avoid unexpected starting.
• Do not wear loose clothing or jewelry near
moving parts such as PTO shafts, fans, belts
and pulleys.
• Keep hands away from moving parts.
• Keep guards in place over fans, belts, pulleys,
and other moving parts.
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Page 6
BATTERY GAS IS EXPLOSIVE
• Wear safety glasses.
• Do not smoke near the batteries or near the
generator set.
• To reduce arcing when disconnecting or reconnecting battery cables, always disconnect the
negative (−) battery cable first and reconnect
it last.
FLAMMABLE VAPOR CAN CAUSE A
DIESEL ENGINE TO OVERSPEED
Flammable vapor can cause a diesel engine to
overspeed and become difficult to stop, resulting in
possible fire, explosion, severe personal injury and
death. Do not operate a diesel-powered genset
where a flammable vapor environment can be
created by fuel spill, leak, etc. The owners and
operators of the genset are solely responsible for
operating the genset safely.
GENERAL PRECAUTIONS
• To prevent equipment damage or personal injury, do not store items in the clearance area
around the generator set, especially near the
belt guard end of the generator set.
• Keep children away from the genset.
• Do not use evaporative starting fluids. They
are highly explosive.
• To prevent accidental or remote starting while
working on the genset, disconnect the negative (−) battery cable at the battery.
• Let the engine cool down before removing the
coolant pressure cap or opening the coolant
drain. Hot coolant under pressure can spray
out and cause severe burns.
• Keep the genset and its compartment clean.
Excess oil and oily rags can catch fire. Dirt and
gear stowed in the compartment can restrict
cooling air.
• Make sure all fasteners are secure and
torqued properly.
• Do not work on the genset when mentally or
physically fatigued or after consuming alcohol
or drugs.
• You must be trained and experienced to make
adjustments while the genset is running—hot,
moving or electrically live parts can cause severe personal injury or death.
• Used engine oil has been identified by some
U. S. state and federal agencies as causing
cancer or reproductive toxicity. Do not ingest,
inhale, or contact used oil or its vapors.
• Ethylene glycol, used as engine antifreeze, is
toxic to humans and animals. Clean up spills
and dispose of used engine coolant in accordance with local environmental regulations.
• Keep multi-class ABC fire extinguishers readily at hand. Class A fires involve ordinary combustible materials such as wood and cloth.
Class B fires involve combustible and flammable liquids and gaseous fuels. Class C fires
involve live electrical equipment. See NFPA
No. 10 or equivalent—BS EN 3-7:2004 [Portable Fire Extinguishers].
• Genset installation and operation must comply
with all applicable local, state and federal
codes and regulations.
Mobile-8
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1. Introduction
ABOUT THIS MANUAL
This is the Operator’s Manual for the generator sets
(gensets) listed on the front cover. Read and carefully observe all of the instructions and precautions
in this manual. Keep this manual and the genset
Installation Manual with the other vehicle manuals.
Operation, Periodic Maintenance and Troubleshooting provide the instructions necessary for op-
erating the genset and maintaining top performance. The owner is responsible for performing
maintenance in accordance with the PERIODIC
MAINTENANCE SCHEDULE (p. 3-1).
[The engine family designation, engine displacement, statement
of compliance with the applicable EPA and / or California emissions regulations, including the compliance period or category,
appear in this block on the actual nameplate on the genset.]
WARNING
This genset is not a life support system. It can stop without warning. Children, persons with physical or mental limitations, and
pets could suffer personal injury or death. A personal attendant, redundant power or alarm system must be used if genset operation is critical.
WARNING
Improper service or replacement of
parts can lead to severe personal injury or death
and to damage to equipment and property. Service personnel must be qualified to perform
electrical and mechanical service.
Unauthorized modifications or replacement of
fuel, exhaust, air intake or speed control system
components that affect engine emissions are
prohibited by law in the State of California.
NAMEPLATE
Be ready to provide the genset model and serial
numbers on the nameplate when contacting Cummins Onan for parts, service or information. Figure 1-1 illustrates the nameplate and its location.
The gray boxes illustrate where to look for the model
and serial numbers.
FIGURE 1-1. TYPICAL NAMEPLATE
Record these numbers in Figure 1-2 so that they are
easy to find when needed. Each character in these
numbers is significant. The last character of the
model number is the specification letter, which is important for obtaining the right parts. Genuine Cummins Onan replacement parts are recommended
for best results. Refer to the genset Parts Catalog.
MODEL NUMBER: ___________________________
SERIAL NUMBER: ___________________________
FIGURE 1-2. RECORD NUMBERS HERE
1-1
Page 8
HOW TO OBTAIN SERVICE
Information to Have Ready
When you call for service, parts, or product literature
(such as the Service Manual or Parts Catalog) for
your genset, contact the nearest authorized Cummins Onan distributor. Cummins Onan has factorytrained representatives to handle your requests for
genset parts and service. For information for contacting our distributors worldwide, go to internet site
www.cumminsonan.com.
In North America
Call 1-800-888-ONAN to contact the nearest Cummins Onan distributor in the United States or Canada. (This automated service utilizes touch-tone
phones only). Select OPTION 1 (press 1) to be automatically connected to the distributor nearest to
you.
If you are unable to contact a distributor using the
automated service, consult the Yellow Pages. Typically, our distributors are listed under:
GENERATORS − ELECTRIC,
ENGINES − GASOLINE OR DIESEL, or
RECREATIONAL VEHICLES − EQUIPMENT,
PARTS AND SERVICE.
Before calling for service, have the following information available:
1. The complete genset model number and serial
number. See the nameplate..
2. The date of purchase.
3. The nature of the problem. See Section 4. Trou-
bleshooting.
ENGINE EMISSIONS COMPLIANCE
The label that states compliance with applicable engine emissions regulations is located on the side
wall of the base pan, as shown circled in Figure 1-3.
Refer also to the FEDERAL EMISSION DESIGN
AND DEFECT LIMITED WARRANTY FOR C. I. ENGINES (DIESELS) that was shipped in the same
package as the Operator’s Manual.
If you have difficulty in arranging service or resolving a problem, please contact the Service Manager
at the nearest Cummins Onan distributor for assistance.
Outside North America
If you are outside North America, call Cummins
Power Generation at 1−763−574−5000 from
7:30 AM to 4:00 PM, Central Standard Time,
Monday through Friday, or fax 1−763−528−7229.
EMISSIONS LABEL
FIGURE 1-3. EMISSIONS LABEL LOCATION
1-2
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TYPICAL GENSET
Figures 1-4 and 1-5 illustrate the location of key operating features such as the fuel and battery con-
nection points, control panel switches, hour meter,
the coolant and oil fill locations, and other operating
component locations.
COOLANT AIR BLEED VALVE
REAR CONTROL PANEL CONNECTIONS
WITH COVER AND GENERATOR SET
CONTROL REMOVED FOR CLARITY -
SEE DETAIL
COMPARTMENT AIR
TEMPERATURE
SWITCH
SPARK ARRESTOR PLUG
LINE 1
LINE 2
FIGURE 1-4. TYPICAL GENSET
1-3
LOAD 1
LOAD 2
GROUND STUD
Page 10
CIRCUIT BREAKER
COOLING/
VENT AIR
IN
HOUR METER
START/STOP/
PRIME
AIR FILTER
COOLANT FILL
OIL
FILL
OIL DIP-
STICK
OIL FILTER
OPTIONAL
BATTERY
AND FUEL CON-
NECTIONS
ON THIS END
COMPARTMENT
COOLING FAN
LIFTING EYE
COOLANT
RECOVERY
TANK
HOT AIR OUT
OIL
DRAIN
HOSE
FUEL
CONNECTIONS
FUEL FILTER
BATTERY
CONNECTIONS
HOT
AIR OUT
COOLING FAN
FIGURE 1-5. GENSET COMPONENT LOCATIONS
1-4
ENGINE COMBUSTION
AIR
Page 11
2. Operation
FUEL RECOMMENDATIONS
WARNING
cause severe personal injury or death. Do not
smoke near fuel tanks or fuel-burning equipment or in areas sharing ventilation with such
equipment. Keep flames, sparks, pilot flames,
electrical arcs and switches and all other
sources of ignition well away. Keep a multiclass ABC fire extinguisher handy.
High quality diesel fuel is necessary for good performance and long engine life.
• The specifications for the type and sulfur content (ppm, % weight) of the diesel fuel used
must comply with all emissions regulations applicable in the areas where the genset is to be
operated.
• Diesel fuels meeting ASTM D975 or EN 590
specifications are recommended. Use Grade
1-D diesel fuel where ambient temperatures
are below 14° F (−10° C). A minimum Fuel Cetane Rating of 45 is recommended. Where ambient temperatures are below −4° F (−20° C), or
the elevation is above 5000 ft (1500 m), a minimum Cetane Rating of 50 is recommended.
• Current US EPA regulations for Non-Road engines limit diesel fuel sulfur content to a maximum of 500 ppm (0.05% weight). Therefore,
use Grade 2-D S500 or 2-D S15 diesel fuel.
Where ambient temperatures are below 14° F
(−10° C), use Grade 1-D S500 or 1-D S15 diesel fuel. Note that beginning in year 2010, US
EPA regulations for Non-Road engines will limit
diesel fuel sulfur content to a maximum of 15
ppm (0.0015% weight).
Diesel fuel is combustible and can
• Do not use diesel fuel having a sulfur content
greater than 10,000 ppm (1.0% weight).
• Diesel fuel must meet the ASTM D975 standard for lubricity and pass a minimum load level
of 3100 grams as measured by ASTM D6078,
or maximum scar diameter of 0.45 mm as measured by ASTM D6079 or ISO 12156−1.
• B20 Bio-Diesel fuel that meets industry specifications and quality is suitable for use with this
genset.
ENGINE OIL RECOMMENDATIONS
Oil Performance Class
Use API (American Petroleum Institute) classified
engine oils according to the following guidelines:
• Emissions-Regulated Areas: It is mandatory
to use CF, CF−4, CG−4, CH−4 or CI−4 class oil
with low sulfur fuel (sulfur content less than 500
ppm, 0.05% weight) or ultra low sulfur fuel (sulfur content less than 15 ppm, 0.0015% weight).
• Non-Regulated Areas: CF class oil is recommended when using high sulfur fuel—sulfur
content between 500 ppm (0.05% weight) and
5000 ppm (0.5%weight). If CF−4, CG−4, CH−4
or CI−4 class oil is used, the oil and oil filter
must be changed twice as often as specified in
the PERIODIC MAINTENANCE SCHEDULE
(Page 3-1).
• Non-Regulated Areas: Use CF, CF−4, CG−4,
CH−4 or CI−4 class oil when using high sulfur
fuel—sulfur content between 5000 ppm (0.5%
weight) and 10,000 ppm (1.0% weight). The oil
and oil filter must be changed twice as often as
specified in the PERIODIC MAINTENANCE
SCHEDULE (Page 3-1).
2-1
Page 12
Oil Viscosity
Look for the SAE (Society of Automotive Engineers)
viscosity grade. Referring to Figure 2-1, choose the
viscosity grade appropriate for the ambient temperatures expected until the next scheduled oil change.
Multi-grade oils such as SAE 15W-40 are recommended for year-round use.
30
15w40
10w30, 10w40
5w30
0w40
FIGURE 2-1. OIL VISCOSITY VS. TEMPERATURE
COOLANT RECOMMENDATIONS
Use the best quality ethylene glycol antifreeze solution available. It should be fully formulated with rust
inhibitors and coolant stabilizers and mixed with
fresh (distilled) water that is low in minerals and corrosive chemicals. A 50/50 mixture is recommended
for all climates and is suitable for temperatures
down to -34
See Section 5. Specifications for coolant capacity.
Coolant Recovery Tank Fill Cap − The recovery
tank provides for coolant expansion. Replenish the
normal loss of coolant by filling here.
° F (-37° C).
STARTING BATTERIES
The genset requires a 12 volt battery to power its
control and starting circuits. Reliable genset starting
and starter service life depend upon adequate battery system capacity and maintenance.
See MAINTAINING THE BATTERY AND BATTERY
CONNECTIONS (p. 3-4) and Section 5. Specifi-
cations for minimum required battery ratings.
CONTROL PANEL
The control panel (Figure 2-2) has the following features:
Control Switch − This switch is used to start and
stop the genset, prime the engine fuel system and
restore the fault code (blinking status light).
Status Lamp − This is a lamp in the control switch
that blinks rapidly during preheat and cranking. It
stays on continuously while the genset is running. If
the genset shuts down, it will blink a numerical code
to indicate the nature of the fault shutdown (see
Section 4. Troubleshooting).
(Rapid blinking before cranking starts indicates that
the glow plugs are preheating the combustion
chambers. The genset controller automatically varies the time based on engine temperature.)
Line Circuit Breaker(s) − The line circuit breakers
protect the AC power leads connected to the genset.
Hour Meter − The hour meter records the total run-
ning time of the genset. It cannot be reset.
REMOTE CONTROL PANEL
A remote genset control panel can be installed inside the vehicle. Three control panel kits are available:
• Remote switch / status lamp
• Remote switch / status lamp and hour meter
• Remote switch / status lamp and DC voltmeter
The DC voltmeter indicates whether voltage across
the 12 VDC control system and battery is normal. If
the indicator consistently stays above or below the
normal zone, see MAINTAINING THE BATTERY
AND BATTERY CONNECTIONS (p. 3-4).
2-2
Page 13
CONDUIT
CONNECTOR
CIRCUIT BREAKER
FIGURE 2-2. CONTROL PANEL
HOUR
METER
START/STOP/
PRIME
WARNING
EXHAUST GAS is deadly. All en-
gine exhaust contains carbon monoxide; an
odorless, colorless, poisonous gas that can
cause unconsciousness and death. Symptoms
of carbon monoxide poisoning include:
• Dizziness • Headache
• Nausea • Weakness and Sleepiness
• Vomiting • Inability to Think Coherently
IF YOU EXPERIENCE ANY OF THESE SYMPTOMS, GET INTO FRESH AIR IMMEDIATELY. If
symptoms persist, seek medical attention. Shut
down the genset and do not operate it until it has
been inspected and repaired.
Never sleep in the vehicle while the genset is
running unless the vehicle has a working carbon monoxide detector. The exhaust system
must be installed in accordance with the genset
Installation Manual. Make sure there is ample
fresh air when operating the genset in a confined area.
PRE-START CHECKS
Before each start:
1. Make sure all vehicle carbon monoxide (CO)
detectors are working.
2. Check for fuel, oil and coolant leaks and damage to the exhaust system.
3. To prevent overheating and to reduce fouling
with dust and debris, make sure the genset’s
normal ground clearance is not reduced by
sloping ground, curbs, logs or other objects.
Repark the vehicle if necessary and/or remove
any objects blocking the air inlet or air outlet.
4. Turn off air conditioners and other large appliances.
5. Make sure that nothing is stored in the area
around the generator set, and make sure that
nothing is interfering with generator set operation.
PRIMING THE FUEL SYSTEM
Before the first start of the day and after every eight
hours of operation, inspect the genset as instructed
under GENERAL INSPECTION (p. 3-2). Keep a log
of maintenance and the hours run and perform any
maintenance that may be due. See Returning the
Genset to Service (p. 2-6) if the vehicle has been in
storage.
The fuel system should be primed after replacing
the fuel filter or running the genset out of fuel. To
prime the fuel system, hold the control switch down
in its Stop position for at least half a minute. (Shutdown Code No. 57, Overprime, occurs after 3 minutes of holding the switch down. See Section 4.
Troubleshooting.)
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MANUAL STARTING
The genset can be started and stopped from the
genset control panel or from a remote panel.
1. Perform the PRE-START CHECKS, prime the
fuel system if necessary, and turn off the air
conditioners and other large electrical loads.
2. Push and hold Start until the genset starts. The
status lamp will come on when the genset starts
and will stay on while it runs. While starting it will
blink rapidly indicating preheating and cranking. (Depending on how cold it is, preheating
can take up to 15 seconds, extending the time
that the lamp blinks.)
CAUTION
heat and damage the starter motor. Do not
crank for more than 30 seconds at a time.
Wait at least 2 minutes before trying again.
3. See Section 4. Troubleshooting if the genset
does not start after several tries.
4. Let the genset warm up for a few minutes until
it is running smoothly before connecting the vehicle electrical loads (appliances).
5. Check for fuel, oil, coolant and exhaust leaks.
Stop the genset immediately if there is a leak
and have it repaired.
Excessive cranking can over-
S Sleeping in vehicle, unless vehicle has a
working CARBON MONOXIDE detector
S Parking vehicle in garage or confined space
S Parking vehicle for storage
S Servicing genset
S Servicing batteries
S Servicing electrical appliances
S Fueling vehicle
LOADING THE GENSET
The genset can power AC motors, air conditioners,
AC/DC converters, battery chargers and other appliances. How much appliance load* can be powered depends upon the genset power rating. The
genset will shut down or its circuit breakers will trip if
the sum of the loads exceeds the rated genset power. See Section 4. Troubleshooting.
To avoid overloading the genset and causing shutdowns, compare the sum of the loads of the appliances that are likely to be used at the same time to
the power rating of the genset. It may be neces-
sary to run fewer appliances at the same time—
the sum of the loads must not be greater than
genset power rating.
MANUAL STOPPING
Run the genset under no load for a few minutes to
allow the engine to cool down and then push and release Stop.
AUTOMATIC STARTING AND STOPPING
The vehicle may be equipped with an inverter-charger or other automatic genset starting device
(AGS). Always follow the instructions and safety
precautions provided by the manufacturer of the automatic starting device when enabling automatic
genset starting.
WARNING
ING PARTS and ELECTRICITY can cause severe
personal injury or death. To reduce exposure to
these hazards, always disable automatic genset
starting before:
EXHAUST GAS is deadly. MOV-
The genset may shut down due to overload when a
large motor or air conditioner is started or cycles off
and then on again, even though the sum of the loads
is less than the genset rating. The reason for this is
that a motor’s startup load is much larger than its
running load. It may be necessary to run fewer
appliances when large motors and air conditioners are cycling on and off.
Maximum power decreases as altitude increases
because air density decreases. Maximum power
also decreases as ambient temperature increases.
For every 1000-foot (305 m) increase in elevation,
expect the power to decrease approximately
3.5 percent. For every 10° F (5.5° C) increase in ambient temperature above 85° F (29.4° C), expect the
power to decrease approximately 1 percent. See
Table 2-1. It may be necessary to run fewer ap-
pliances at higher altitudes.
* Appliance load and genset power are measured in terms of watts (W) or kilowatts (kW), where 1 kilowatt (kW) = 1000 watts (W).
2-4
Page 15
TABLE 2-1. POWER VS. ALTITUDE
Altitude
(Elevation above Sea Level)
at/below 500 ft (152 m) 20,000 W (genset rating)
at 2500 ft (762 m) 18,600 W
at 5500 ft (1676 m) 16,500 W
above 5500 ft (1676 m) 16,500 W minus 700 W every 1000 ft (305 m)
TABLE 2-2. POWER VS. TEMPERATURE
Temperature
Maximum Power (60 Hz)
Maximum Power (60 Hz)
85° F (29.4° C)
95° F (35° C)
105° F (40.6° C)
122° F (50° C) or greater 19,260 W minus 200 W every 10° F (5.5° C)
TABLE 2-3. POWER VS TEMPERATURE AND ALTITUDE
Temperature and Altitude
85° F at/below 500 ft
95° F at 2500 ft
105° F at 2500 ft
RESETTING CIRCUIT BREAKERS
20,000 W (genset rating)
19,800 W
19,600 W
Maximum Power (60 Hz)
20,000 W (genset rating)
18,400 W
18,200 W
WARNING
Short circuits in electrical ap-
pliances and tools can cause fire and electrical
If a circuit breaker in the main power distribution
panel of the vehicle or on the genset (Figure 2-2)
trips, either a circuit shorted or too many appliances
were running. Note that the genset will continue to
run after a circuit breaker trips.
If a circuit breaker trips, disconnect or turn off as
many loads as possible and reset the circuit breaker. (Push the circuit breaker to OFF to reset it and
then to ON to reconnect the circuit.) If the circuit
breaker trips right away, either the electrical distribution system has a short or the circuit breaker is
faulty. Call a qualified electrician.
shock leading to severe personal injury or
death. Read and follow the equipment and tool
manufacturer’s instructions and warnings regarding use, maintenance and proper grounding.
CONNECTING TO UTILITY POWER
A vehicle with provisions for connecting to utility
power must have an approved device to keep the
genset and utility from being interconnected. See
the genset Installation Manual for more information.
WARNING
Interconnecting the genset and the
public utility (or any other power source) can
If the circuit breaker does not trip, reconnect the appliances, one by one, up to a total load that does not
overload the genset or cause the circuit breaker to
lead to electrocution of utility line workers,
equipment damage and fire. Use an approved
switching device to prevent interconnections.
trip. If a circuit breaker trips right away when an appliance is connected, the appliance probably has a
OPERATING IN COLD WEATHER
short.
Make sure the engine oil viscosity is appropriate for
Electrical appliances and tools must be used and
maintained properly and be properly grounded to
cause the line circuit breakers to trip when short circuits occur.
the cold weather temperatures. See ENGINE OIL
RECOMMENDATIONS (Page 2-1). Be sure to
change the oil if a sudden drop in temperature oc-
curs.
2-5
Page 16
OPERATING IN HOT WEATHER
EXERCISING THE GENSET
Pay particular attention to the following items when
operating the genset in hot weather:
1. Make sure nothing blocks airflow to and from
the genset.
2. Make sure engine oil viscosity is appropriate for
the ambient temperatures. See ENGINE OIL
RECOMMENDATIONS (Page 2-1).
3. Keep the genset clean.
4. Perform maintenance due. See PERIODIC
MAINTENANCE SCHEDULE (Page 3-1).
OPERATING AT HIGH ALTITUDE
For the effect of altitude on maximum power, see
LOADING THE GENSET (Page 2-4).
OPERATING IN DUSTY ENVIRONMENTS
Pay particular attention to the following items when
operating the genset in dusty environments:
1. Do not let dirt and debris accumulate inside the
genset compartment. Keep the genset clean.
2. Perform air cleaner maintenance more often.
See PERIODIC MAINTENANCE SCHEDULE
(Page 3-1).
3. Change engine oil more often. See PERIODIC
MAINTENANCE SCHEDULE (Page 3-1).
4. Keep containers of engine oil that have been
opened tightly closed to keep out dust.
BREAKING IN A NEW ENGINE
Exercise the genset at least 2 hours each month if
use is infrequent. Run the genset at approximately
1/2 rated power. See LOADING THE GENSET
(Page 2-4). A single two hour exercise period is
better than several shorter periods.
Exercising a genset drives off moisture, re-lubricates the engine, replaces stale fuel and removes
oxides from electrical contacts. The result is better
starting, more reliable operation and longer engine
life.
STORING THE GENSET
Proper storage is essential for preserving top genset performance and reliability when the genset
cannot be exercised regularly and will be idle for
more than 120 days.
Storing the Genset
1. Disable the automatic genset starting feature of
an inverter-charger or other automatic starting
device.
WARNING
and can accumulate to dangerous levels in
garages and other confined spaces. Disable the automatic genset starting feature
of an inverter-charger or other automatic
starting device before storing the vehicle.
2. Push the genset line circuit breaker to OFF
(Page 2-5).
3. Change the engine oil and attach a tag indicating oil viscosity. See ENGINE OIL RECOMMENDATIONS (Page 2-1).
CARBON MONOXIDE is deadly
Proper engine break-in on a new genset or on one
with a rebuilt engine is essential for top engine performance and acceptable oil consumption. Run the
genset at approximately 1/2 rated power for the first
2 hours and then at 3/4 rated power for 2 more
hours. See LOADING THE GENSET (Page 2-4).
Proper engine oil and oil level are especially critical
during break-in because of the higher engine temperatures that can be expected. Change the oil if not
appropriate for the ambient temperatures during
break-in. See ENGINE OIL RECOMMENDATIONS
(Page 2-1). Check oil level twice a day or every
4 hours during the first 24 hours of operation and
change the oil and oil filter after the first 50 hours of
operation.
4. Disconnect the battery cables (negative [−]
cable first) from the starting battery and store
the battery according to the battery manufacturer’s recommendations. See MAINTAINING
THE BATTERY AND BATTERY CONNECTIONS (Page 3-4).
5. Plug the exhaust tail pipe to keep out dirt, moisture, bugs, etc.
6. Close the fuel supply valve (if so equipped).
Returning the Genset to Service
1. Check the oil tag on the genset and change the
oil if the viscosity indicated is not appropriate for
the temperatures expected. See ENGINE OIL
RECOMMENDATIONS (Page 2-1).
2-6
Page 17
2. Reconnect the starting battery (negative [−]
cable last). See MAINTAINING THE BATTERY
AND BATTERY CONNECTIONS (Page 3-4).
3. Remove the plug from the exhaust tailpipe.
6. Inspect the genset. See GENERAL INSPECTION (Page 3-2).
7. Push the genset line circuit breaker ON
(Page 2-5) when the genset is ready to power
appliances.
4. Replace the air filter element if it is dirty
(Page 3-4).
5. Open the fuel supply valve (if so equipped).
8. Enable the automatic genset starting feature of
an inverter-charger or other automatic starting
device following the device manufacturer’s instructions and safety precautions.
2-7
Page 18
THIS PAGE LEFT INTENTIONALLY BLANK
2-8
Page 19
3. Periodic Maintenance
Periodic maintenance is essential for top performance and long genset life. Use Table 3-1 as a
guide for normal periodic maintenance. In hot and
any engine repair establishment or individual. However, warranty work must be completed by an au-
thorized Cummins Onan dealer.
dusty environments some maintenance procedures
should be performed more frequently, as indicated
by the footnotes in the table.
WARNING
Accidental or remote starting can
cause severe personal injury or death. Discon-
Maintenance, replacement or repair of emission
control devices and systems may be performed by
TABLE 3-1. PERIODIC MAINTENANCE SCHEDULE
1
After
First 50
Hrs
Every
Day
• • 3-3
MAINTENANCE TASK
General Inspection • 3-2
Check Engine Oil Level • 3-2
Check Engine Coolant Level • 3-7
Check Battery & Battery Connections
Change Engine Oil & Oil Filter
Clean Spark Arrestor
Replace Engine Air Filter
3
1, 2, 3, 8
2, 3
nect the negative (−) cable at the battery to pre-
vent starting while working on the genset.
FREQUENCY
Every
Month
Every
250
Hrs
• 3-4
Every
500
Hrs
• 3-5
• 3-4
Every
800
Hrs
Every
1500
Hrs
Every
3000
Hrs
Page
Drain Water from Fuel Filter • 3-6
Replace Fuel Filter
Adjust Engine Valve Lash
Flush Coolant System
Replace Coolant Pressure Cap
Check V-Belt & Coolant Hoses
Replace as necessary
Check Fuel Injector Pressure
Replace Generator Bearing
1. Perform more often when operating in hot weather.
2. Perform more often when operating in dusty conditions.
3. Perform at least once a year.
4. Perform at least once every two years.
5. Perform at least once every five years.
6. Must be performed by trained and experienced personnel (authorized Cummins Onan service representatives).
7. EPA requirement.
8. Perform every 75 hours when using high sulfur fuel. See ENGINE OIL RECOMMENDATIONS (Page 2-1).
3
6
4
4
5, 6
• −
6, 7
6
• 3-6
• −
• 3-7
• 3-7
• −
• −
3-1
Page 20
GENERAL INSPECTION
Inspect the genset before the first start of the day
and after every eight hours of operation.
Do not operate power ventilators or exhaust fans
while the vehicle is standing with the genset run-
ning. The ventilator or fan can draw exhaust gases
into the vehicle.
Oil Level
Check engine oil level (Figure 3-1).
Engine Coolant System
CAUTION
level is low can cause serious engine damage.
Check the engine coolant level and look for coolant
leaks around the bottom of the genset and on the
ground below. Minor leaks that can be replenished
by daily additions of coolant to the recovery tank
should be repaired by a qualified service technician
as soon as possible. Larger leaks are cause for
shutting down the genset until it can be repaired.
Operating the genset when coolant
Exhaust System
WARNING
operate the genset if there is an exhaust leak or
any danger of exhaust gases entering or being
drawn into the vehicle.
Look and listen for exhaust system leaks while the
genset is running. Shut down the genset if a leak is
found and have it repaired before operating the genset again.
EXHAUST GAS IS DEADLY! Do not
Fuel System
Check for leaks at hose, tube and pipe fittings in the
fuel supply system while the genset is running and
while it is stopped. Check flexible fuel hose sections
for cuts, cracks, and abrasions. Make sure the fuel
line is not rubbing against other parts. Replace worn
or damaged fuel line parts before leaks occur.
WARNING
Diesel fuel leaks can lead to fire. Do
not operate the genset if operation causes fuel
to leak.
Prime the fuel system if the genset ran out of fuel.
Battery Connections
Check the battery terminals for clean, tight connections. Loose or corroded connections have high
electrical resistance which makes starting more difficult. See MAINTAINING THE BATTERY AND
BATTERY CONNECTIONS (p. 3-4).
Mechanical
Look for mechanical damage and listen for unusual
noises. Check the genset mounting bolts for any
signs of wear.
Look for openings or holes between the genset
compartment and vehicle cab or living space if the
genset engine sounds louder than usual. Have all
such openings or holes closed off or sealed to prevent exhaust gases from entering the vehicle.
Replace dented, bent or severely rusted sections of
the tailpipe and make sure the tailpipe extends at
least 1 inch (25.4 mm) beyond the perimeter of the
vehicle.
WARNING
Do not park the vehicle in high grass
or brush. Contact with the exhaust system can
cause a fire.
Park the vehicle so that the genset exhaust gases
can disperse away from the vehicle. Barriers such
as walls, snow banks, high grass and brush and other vehicles can cause exhaust gases to accumulate
in and around the vehicle.
To prevent overheating and to reduce fouling with
dust and debris, make sure the genset’s normal
ground clearance is not being reduced by sloping
ground, curbs, logs or other objects. Repark the vehicle if necessary and/or remove any objects blocking the air inlet or air outlet.
CHECKING ENGINE OIL LEVEL
WARNING
termined that contact with used engine oil can
cause cancer or reproductive toxicity. Avoid
skin contact and breathing of vapors. Use rubber gloves and wash exposed skin.
1. Park the vehicle on level ground, and shut
down the genset.
2. Pull out the oil dip stick, wipe it clean, reinsert
it and pull it out again to check the oil level (Figure 3-1).
State and federal agencies have de-
3-2
Page 21
3. Add or drain oil as necessary. See ENGINE OIL
RECOMMENDATIONS (p. 2-1). Keep the oil
level between the FULL and ADD marks.
CAUTION
Too much oil can cause high oil
consumption. Too little oil can cause severe
engine damage. Keep the oil level between
the FULL and ADD marks.
4. Reinsert the dipstick and secure the oil fill cap.
your generator set). Finally, drain all the oil from
the engine into a suitable container. Reinstall
the oil drain hose securely, and close the oil
drain valve or reinsert the oil drain plug (Fig-
ure 3-1).
3. Spin off the oil filter canister and clean the filter
mounting surface on the engine block. Remove
the old gasket if it remains.
CHANGING ENGINE OIL AND OIL FILTER
Refer to Table 3-1 for scheduled engine oil change.
Change oil more often in hot and dusty environments.
1. Run the genset until warm and shut it off.
2. Remove the oil fill cap, and disconnect the oil
drain hose. Then, open the oil drain valve, or remove the plug from the oil pan (according to
4. Make sure the gasket is in place on the new filter and apply a thin film of clean oil to the gasket. Spin the new filter on until the gasket just
touches the block. Turn it an additional 1/2 to
3/4 turn. Do not overtighten.
5. Refill with 10 quarts (9.5 liters) of oil, check oil
level (Figure 3-1).
6. Dispose of the used oil and oil filter according
to local environmental regulations.
OIL FILL
DIP STICK
OIL DRAIN HOSE
FIGURE 3-1. ENGINE OIL MAINTENANCE
OIL DRAIN VALVE
OIL PAN PLUG − ADDITIONAL LOCATION FOR DRAINING
THE ENGINE OIL ON THE BOTTOM OF THE GENERATOR SET IF THE OIL DRAIN HOSE AND OIL DRAIN
VALVE CANNOT BE USED
3-3
OIL
FILTER
Page 22
MAINTAINING THE BATTERY AND
BATTERY CONNECTIONS
WARNING
light switches or other equipment, and flames or
sparks, can ignite battery gas causing severe
personal injury—Ventilate battery area before
working on or near battery—Wear safety
glasses—Do not smoke—Switch work light ON
or OFF away from battery—Stop genset and disconnect charger before disconnecting battery
cables—Disconnect negative (−) cable first and
reconnect last.
Refer to Table 3-1 for scheduled battery maintenance, and follow the battery manufacturer’s instructions. Have the battery charging system ser-
Arcing at battery terminals or in
viced if DC system voltage is consistently low or
high. Always:
1. Keep the battery case and terminals clean and
dry and the terminals tight.
2. Remove battery cables with a battery terminal
puller.
3. Make sure which terminal is positive (+) and
which is negative (−) before making battery
connections, always removing the negative (−)
cable first and reconnecting it last to reduce
arcing.
REPLACING THE AIR FILTER ELEMENT
Refer to Table 3-1 for scheduled air filter replacement. Replace it more often in dusty environments.
The air filter is located on the side of the engine as
shown in Figure 3-2.
AIR FILTER
FIGURE 3-2. REPLACING THE AIR FILTER ELEMENT
3-4
Page 23
CLEANING THE SPARK ARRESTOR
Refer to Table 3-1 for scheduled cleaning of the
spark arrestor (which meets U.S. Forest Service requirements). Cleaning is required for maximum
genset performance.
WARNING
burns. Let the muffler cool down before removing or installing the cleanout plug.
A hot muffler can cause severe
The spark arrestor cleanout plug is located on the
side of the muffler (Figure 3-3). Clean out the spark
arrestor as follows:
1. Remove the 1/4” NPT cleanout plug from the
muffler.
2. Start the genset and load it nearly to full power.
Let the genset run for about five minutes to expel the soot.
3. Stop the genset, allow the muffler to cool down,
reinstall the cleanout plug.
FIGURE 3-3. SPARK ARRESTOR CLEANOUT PLUG
3-5
Page 24
DRAINING/REPLACING THE FUEL FILTER
WARNING
cause severe personal injury or death. Do not
smoke near diesel fuel tanks or equipment.
Keep flames, sparks, pilot lights, electrical
switches, arc-producing equipment and all other sources of ignition well away. Keep a type
ABC fire extinguisher in the vehicle.
Close any fuel line shutoff valve before disconnecting the fuel line from the filter.
Accidental or remote starting can cause severe
personal injury or death. Disconnect the negative (−) cable at the battery to prevent starting
while working on the genset.
Keep dirt, water and other contaminants from entering
the fuel system and corroding or clogging fuel injection
components.
Diesel fuel is combustible and can
Draining Water and Sediment
poor or condensation cannot be avoided. Dispose
of the water, sediment and fuel drained off in accordance with local environmental regulations.
Replacing the Fuel Filter
See Table 3-1 for scheduled fuel filter replacement.
Replace the fuel filter if the engine lacks power.
1. Disconnect the negative (−) cable at the battery
to prevent the engine from starting, and close
any fuel supply and return valves.
WARNING
cause severe personal injury or death. Disconnect the negative (−) cable at the battery to pre-
vent the engine from starting.
2. Spin off the old filter with a filter wrench, and
dispose of it in accordance with local environmental regulations.
3. Clean the contact surface on the filter base, lubricate the new filter gasket, and spin the new
filter on hand tight.
Accidental or remote starting can
The generator set may have a water-separator type
of fuel filter (Figure 3-4). Also check for upstream
water-separator type fuel filters. Drain water and
sediment more often than scheduled if fuel quality is
RETURN HOSE
4. Prime the engine for at least 30 seconds to fill
the new filter (Page 2-3). Run the generator set
and check for leaks. Tighten the filter by hand,
if necessary.
HOSE TO
ENGINE
FUEL FILTER
(WATER-SEPARATOR)
FIGURE 3-4. FUEL FILTER
FILTER
DRAIN PLUG
3-6
FUEL
RETURN
HOSE FROM
FUEL PUMP
FUEL SUPPLY/
FUEL PUMP
Page 25
MAINTAINING THE ENGINE COOLING
SYSTEM
remove the coolant drain plug (Figure 3-5) and
drain the coolant into a suitable container.
Refer to Table 3-1 for scheduled maintenance. The
engine cooling system is filled at the factory with a
50/50 mixture of ethylene glycol anti-freeze and
water, which is suitable for temperatures down to
-34
° F (-37° C).
Recommended Coolant
See COOLANT RECOMMENDATIONS (p. 2-2).
Pressure Cap
Replace the pressure cap (Figure 3-5) every two
years (seals deteriorate and leak). Proper cooling
system pressure (13 psi) is essential for optimal engine cooling and minimal coolant loss.
Draining and Cleaning Cooling System
WARNING
burns. Let the engine cool before releasing the
pressure cap or removing the drain plug.
Accidental or remote starting can cause severe
personal injury or death. Disconnect the negative (−) cable at the battery to prevent starting
while working on the genset.
Let the engine cool before removing the pressure
cap. Relieve any remaining pressure by turning the
pressure cap slowly, without pushing down. When
the pressure has been relieved, push down on the
cap, turn it the rest of the way and withdraw it. Then
Hot coolant spray can cause severe
WARNING
sidered toxic. Dispose of it according to local
regulations for hazardous substances.
Flush and clean the cooling system before refilling.
Radiator cleaning chemicals are available at local
auto parts stores. Follow the instructions for cleaning and flushing that come with the cleaning solution.
Ethylene glycol antifreeze is con-
Refilling Cooling System
Install the coolant drain plug in the radiator using
pipe thread sealant. Tighten it just enough so that it
does not leak when the genset is running and has
warmed up.
Open the air bleed valve located in the engine thermostat housing. Fill the system using a funnel to
prevent coolant from entering the overflow bottle
hose. Once coolant begins to bleed out of the air
bleed valve, close the air bleed valve and add coolant until it reaches the fill opening. Also, fill the recovery tank to the COLD mark, then install the pressure cap. Add more coolant if necessary after the
generator set has run for a few minutes.
Coolant Level Check
Check coolant level in the recovery tank (Figure 3-5) before the first startup of each day and fill to
the COLD mark if necessary with Recommended
Coolant.
3-7
Page 26
COOLANT PRESSURE CAP
COOLANT SYSTEM
AIR BLEED VALVE
COOLANT DRAIN
PLUG
COOLANT RECOVERY TANK
FIGURE 3-5. ENGINE COOLING SYSTEM
3-8
Page 27
4. Troubleshooting
TROUBLESHOOTING WITH TABLE 4-1
To aid troubleshooting the genset controller causes
the status indicator light to blink the numeric code
assigned to the fault that caused shutdown. For a
brief description of the fault and step-by-step corrective action, refer to TABLE 4-1. TROUBLESHOOTING, which lists the fault codes in numerical
order.
If you are unable to resolve the problem after taking
the corrective actions suggested, contact an authorized Cummins Onan dealer. See HOW TO OBTAIN
SERVICE (p. 1-2).
Note: Many genset shutdowns can be avoided by
performing periodic maintenance on schedule
(TABLE 3-1. PERIODIC MAINTENANCE SCHEDULE)
and by not running the genset out of fuel. Note that
when the genset and propulsion engine draw from
the same fuel tank, the fuel dip tubes are usually arranged so that the genset will run out of fuel first. By
marking the genset empty point on the fuel gauge, it
will be easier to tell when the genset may run out of
fuel.
FAULT CODE BLINKING
At fault shutdown, the status indicator light will repeatedly blink sets of 1, 2, 3 or 4 blinks.
• One blink indicates shutdown due to high en-
gine coolant temperature.
• Two blinks indicate shutdown due to a loss of
engine oil pressure.
• Three blinks indicate a service fault. Press
Stop once to cause the two-digit, second-level
shutdown code to blink. (Pressing Stop again
will stop the blinking.) The two-digit code consists of 1, 2, 3, 4 or 5 blinks, a brief pause, and
then 1 to 9 blinks. The first set of blinks represents the tens digit and the second set of blinks
the units digit of the shutdown code number.
For example, shutdown code No. 36 appears
as:
blink-blink-blink—pause—blink-blink-blink-blink-blink-blink—
long pause—repeat
• Four blinks indicate that cranking time exceeded 35 seconds.
•
To avoid the possibility of anyone misinterpreting
Code Nos. 3 and 4 as Code Nos. 33 and 44, the latter have not been assigned faults.
RESTORING FAULT CODE BLINKING
Blinking continues for five minutes and stops. To restore blinking press the control switch to STOP
(Prime) until the light comes on (3 to 4 seconds).
Then press STOP (Prime) three times to restores
blinking.
Note: The last fault logged will blink even though the
condition that caused the shutdown may have been
corrected.
4-1
Page 28
TABLE 4-1. TROUBLESHOOTING
WARNING
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
Some genset service procedures present hazards that can result in severe per-
NO RESPONSE AT CONTROL SWITCH
(Faulty switch, poor or missing connections, dead battery)
Corrective Action:
1. Try the genset (local) control switch if there is no response at the remote control switch, and vice
versa.
2. Check for 12 VDC across genset battery cable terminal block. Service as necessary by cleaning and
tightening battery cable connections, recharging or replacing the battery or replacing damaged or
missing battery cables.
THE STARTER ENGAGES AND DISENGAGES
(Low cranking voltage)
Corrective Action:
1. Have the vehicle propulsion engine running while trying to start the genset. Its charging alternator
may be able to maintain a high enough battery terminal voltage to start the genset.
2. Service the battery as necessary by cleaning and tightening connections, recharging or replacing
the battery or replacing damaged battery cables.
THE STARTING BATTERIES DO NOT MAINTAIN A CHARGE
(Marginal battery, battery connections or charging system)
Corrective Action:
1. Service the battery as necessary by cleaning and tightening connections, recharging or replacing
the battery or replacing damaged battery cables.
2. Have the battery recharging system serviced.
NO AC POWER WHEN GENSET IS RUNNING
(A Circuit Breaker is OFF, tripped or malfunctioning or there are poor AC harness connections)
Corrective Action:
1. Reset or turn ON genset circuit breaker CB1.
2. Reset or turn ON any other circuit breaker in the AC power supply system.
PERSISTENT, AUDIBLE ENGINE SURGING—WITHOUT FAULT SHUTDOWN
(Fuel leaks, restrictions or air bubbles, worn slip rings/brushes, misadjusted or faulty governor,
worn generator bearing)
Corrective Action:
1. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime.
2. Replace the fuel filter (p. 3-6).
4-2
Page 29
TABLE 4-1. TROUBLESHOOTING
WARNING
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
Some genset service procedures present hazards that can result in severe per-
ENGINE OVER TEMPERATURE—CODE NO. 1
(During normal operation engine coolant temperature exceeded 239° F [115° C] for 10 seconds)
Corrective Action:
1. Check engine coolant level, add coolant as necessary and repair any leaks.
2. Check for and remove any objects blocking the air inlet or outlet openings in the bottom of the genset
and clean out dirt fouling the radiator passages.
3. Run fewer appliances at the same time to keep down engine temperature. (Note that high altitude
and high ambient temperature decrease engine cooling capacity.)
LOW OIL PRESSURE—CODE NO. 2
(During normal operation engine oil pressure dropped to less than
14 psi [97 kPa] for 3 seconds—switch closed)
Corrective Action:
1. Check engine oil level, add oil as necessary and repair any leaks.
2. Drain the excess oil if the level is above Full on the dipstick. If the level is too high the crankshaft can
whip the oil into foam, which the pump can’t pump.)
SERVICE CHECK—CODE NO. 3
(A second-level fault occurred)
Corrective Action: Check the second-level fault code by momentarily pressing Stop. The second-level fault will be one of the following in this table.
OVER CRANK—CODE NO. 4
(First-level fault code—Cranking time exceeded 35 seconds)
Corrective Action:
1. Check fuel level and refill as necessary. (Note: The genset fuel pickup is probably higher than the
vehicle engine fuel pickup.)
2. Prime the engine fuel system for one minute (p. 2-3).
3. Check the engine air filter and remove any blockage (p. 3-4).
4. Change the engine oil to oil of the proper viscosity for the ambient temperature. High oil viscosity
can slow down cranking speed.
5. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime.
6. Replace the fuel filter (p. 3-6).
OVER VOLTAGE—CODE NO. 12
(After voltage regulation was enabled Output Voltage jumped to more than 125% of rated for 75 millisec-
onds or to more than 115% of rated for 3 seconds)
Corrective Action: See an authorized Cummins Onan dealer.
4-3
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TABLE 4-1. TROUBLESHOOTING
WARNING
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
Some genset service procedures present hazards that can result in severe per-
UNDER VOLTAGE—CODE NO. 13
(After voltage regulation was enabled Output Voltage fell to less than 90% of rated for 5 seconds)
Corrective Action: Turn OFF the line circuit breaker on the operator’s console. If the genset now
runs, run it with fewer connected loads.
OVER FREQUENCY—CODE NO. 14
(After the starter was engaged Frequency jumped to more than 70 Hz for 40 milliseconds, or to more
than 66 Hz for 6 seconds)
Corrective Action:
1. Check for a tripped genset circuit breaker, reset it if necessary, and run with fewer connected loads.
(A breaker tripping under load can cause genset frequency to overshoot.)
2. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime. (Air bubbles can
disrupt frequency.)
UNDER FREQUENCY—CODE NO. 15
(During normal operation Frequency fell to less than 54 Hz for more than 8 seconds)
Corrective Action:
1. Push the line circuit breaker to OFF and restart the genset. If the genset now runs, run it with fewer
connected loads, especially those with high motor starting loads such as air conditioners.
2. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime. (Air bubbles can disrupt frequency.)
3. Replace the engine air filter and clean the spark-arrest muffler (p. 3-4).
4. Replace the fuel filter (p. 3-6).
ACTUATOR SHORTED OR OPEN—CODE NO. 19
(At startup the Controller sensed an open or shorted governor actuator/harness)
Corrective Action: See an authorized Cummins Onan dealer.
ACTUATOR OVERLOAD—CODE NO. 22
(Due to connected overload or low engine performance, the Controller maintained the governor actuator
at full-duty cycle—maximum pulse-width-modulated square-wave signal [PWM]—for
60 consecutive seconds)
Corrective Action:
1. Reduce the number of appliances running at the same time, especially those with high motor starting
loads such as air conditioners.
2. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime.
3. Replace the engine air filter and clean the spark-arrest muffler (p. 3-4).
4. Replace the fuel filter (p. 3-6).
4-4
Page 31
TABLE 4-1. TROUBLESHOOTING
WARNING
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
Some genset service procedures present hazards that can result in severe per-
VAC SENSE LOST—CODE NO. 27
(The Controller lost VAC sensing during normal voltage regulation when the field was functioning nor-
mally and frequency was at least 40 Hz)
Corrective Action: See an authorized Cummins Onan dealer.
HIGH BATTERY VOLTAGE—CODE NO. 29
(During startup the Controller sensed that battery system voltage was greater than 19.2 volts for 5 milli-
seconds or greater than 19.2 volts for 1 second will running)
Corrective Action:
1. Check battery bank connections and reconnect if necessary so that the 12 volt batteries serving the
genset are connected in parallel (12 volt) rather than in series (24 volt).
2. Select a lower battery booster charge rate.
STARTING FAULT—CODE NO. 32
(The Controller could not detect cranking speed [quadrature zero crossings] for 12 seconds)
Corrective Action:
1. Have the vehicle propulsion engine running while trying to start the genset. Its charging alternator
may be able to maintain a high enough battery terminal voltage to start the genset.
2. Service the battery as necessary by cleaning and tightening connections, recharging or replacing
the battery or replacing damaged battery cables.
3. Change the engine oil to oil of the proper viscosity for the ambient temperature. High oil viscosity
can slow down cranking speed.
EE CHECKSUM FAULT—CODE NO. 35
(During startup the genset Controller detected an EE memory error)
Corrective Action: See an authorized Cummins Onan dealer.
MECHANICAL FAULT—CODE NO. 36
(The Controller declared this fault because engine speed fell below 1000 RPM for 0.5 seconds, though
not by Controller action)
Corrective Action:
1. Check fuel level and refill as necessary. (Note: The genset fuel pickup is probably higher than the
vehicle engine fuel pickup.)
2. Prime the engine fuel system for one minute (p. 2-3).
3. Check all fuel fittings for fuel and air leaks and tighten as necessary. Reprime.
4. Check the engine air filter and remove any blockage (p. 3-4).
5. Replace the fuel filter (p. 3-6).
4-5
Page 32
TABLE 4-1. TROUBLESHOOTING
WARNING
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
Some genset service procedures present hazards that can result in severe per-
FIELD OVERLOAD—CODE NO. 38
(During normal voltage regulation Quad Voltage exceeded 150 VAC for 10 seconds)
Corrective Action:
1. Reduce the number of air conditioners running at the same time, and other appliances that cause
low power factor. (The lower the power factor of a motor or compressor, the more current it draws
per kilowatt. The genset Controller, in turn, must boost field voltage to meet the higher demand for
current imposed by low power factor.)
2. Have the air conditioners and other appliances checked for proper operation. (A locked compressor
rotor can cause a very low power factor.)
RAM FAULT—CODE NO. 43
(During startup the genset Controller detected a RAM memory error)
Corrective Action: See an authorized Cummins Onan dealer.
SPEED SENSE LOST—CODE NO. 45
(After start disconnect the Controller lost speed sense [quadrature zero crossings] for 0.25 seconds)
Corrective Action: See an authorized Cummins Onan dealer.
OVERPRIME—CODE NO. 57
(The local or remote control switch was held in the Prime position for more than 3 minutes)
Corrective Action: Check for and remove any object that may be holding either control switch (remote
or local) in the prime position.
COMPARTMENT OVERTEMP−−CODE NO. 76
(During operation, the temperature inside the compartment has reached 180° F [82° C]. The air temper-
ature switch will reset at 165° F [74° C].)
Corrective Action:
1. Check the connections of the air temperature switch.
2. Check to make sure the inlet to the remote fan is not blocked.
3. Check to make sure the compartment cutout for cooling air exhaust is not obstructed.
4-6
Page 33
5. Specifications
CAUTION
Do not convert the generator set from 60 Hz to 50 Hz. Attempting to do so will damage the
equipment.
MODEL:
GENERATOR SET CONTROL: Integrated Microprocessor-Based Engine and Generator Controller
GENERATOR: Single-Bearing, 4-Pole Rotating Field
Power (@1.0 power factor) 20,000 W
Voltage 120 / 240
Frequency 60 Hz
Number of Phases 1
Current 83.3 amps per leg
Line Circuit Breaker 2-pole, 85 amp
FUEL CONSUMPTION:
No-load
Half-load
Full-load
ENGINE: 4-Cylinder In-Line, Water-Cooled, Indirect-Injection (IDI), 4-Stroke Cycle Diesel
Bore 3.43 in (87 mm)
Stroke 4.03 in (102.4 mm)
Displacement 148.53 in
Compression Ratio 24.3 : 1
Fuel Injection Timing (BTDC) 13.5° − 15°
Firing Order (Clockwise Rotation) 1−3−4−2
Fuel Nozzle Injection Pressure 1991 psi (13.73 MPa)
Cylinder Compression Test 370 psi (2.55 MPa) minimum
Valve Lash: Intake & Exhaust (cold)
Oil Capacity (with filter)
Cooling System Capacity
0.0071 to 0.0087 in (0.18 to 0.22 mm)
HDKAW
0.54 gph (2.04 lph)
1.12 gph (4.24 lph)
1.95 gph (7.39 lph)
3
(2,434 cc)
10 quart (9.5 liter)
7.8 quart (7.4 liter)
DC SYSTEM:
Nominal Battery Voltage
Minimum Battery Capacity
CCA (Cold Cranking Amps)
Maximum Regulated Charging Current
WEIGHT: 890 lbs (404 kg)
SIZE (L x W x H): 48.9 x 23.6 x 29.7 in (1241 x 600 x 708 mm)
650 amps down to 0° F (−17° C)
875 amps down to −10° F (−23° C)
1000+ amps down to −20° F (−29° C)
12 volts
40 amps
5-1
Page 34
MODEL:
SOUND LEVEL:
60 Hertz Models
50 Hertz Models
HDKAW
81.9 dB(A) @ 10 ft (3m) before installation @
full load
79.4 dB(A) @ 10 ft (3m) before installation @
full load
5-2
Page 35
6. Maintenance Record
Record all periodic and unscheduled maintenance and service. See Section 3. Periodic Maintenance.
HOUR
DATE
METER
READING
MAINTENANCE OR SERVICE PERFORMED
Record the name, address, and phone number of your authorized Cummins Onan service center.
6-1
Page 36
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6-2
Page 37
Cummins Power Generation
1400 73rd Ave. NE
Minneapolis, MN 55432 USA
Phone 1 763 574 5000
Toll-free 1 800 888 6626
Fax 1 763 574 5298
Email www.cumminsonan.com/contact
www.cumminsonan.com
CumminsR, OnanR, the “C” logo, and “Performance you rely on.”
are trademarks of Cummins Inc.
E2009 Cummins Power Generation, Inc. All rights reserved.
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