Generac Power Systems 15 kW EcoGen User manual

Owner’s Manual
60 Hz Air-Cooled Generators
15 kW EcoGen™
SAVE THIS MANUAL FOR FUTURE REFERENCE
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000918
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(888-436-3722)
(000209a)
WARNING
This product is not intended to be used in
a critical life support application. Failure to
adhere to this warning could result in
death or serious injury.

ii Owner’s Manual for 60 Hz EcoGen™?Generators
Use this page to record important information about your generator set.
Record the information found on your unit data label on this
page. See General Information for the location of the unit
data label. The unit has a label plate affixed to the inside
partition, to the left of the control panel console as shown in
Figure 2-1. See Operation for directions on how to open the
top lid and remove the front panel.
When contacting an Independent Authorized Service Dealer
(IASD) about parts and service, always supply the complete
model and serial numbers of the unit.
Operation and Maintenance: Proper maintenance and care
of the generator ensures a minimum number of problems
and keeps operating expenses at a minimum. It is the
operator’s responsibility to perform all safety checks, to
make sure that all maintenance for safe operation is
performed promptly, and to have the equipment checked
periodically by an IASD. Normal maintenance, service, and
replacement of parts are the responsibility of the owner/
operator and are not considered defects in materials or
workmanship within the terms of the warranty. Individual
operating habits and usage may contribute to the need for
additional maintenance or service.
When the generator requires servicing or repairs, Generac
recommends contacting an Independent Authorized Service
Dealer for assistance. Authorized service technicians are
factory–trained and are capable of handling all service
needs.To locate the nearest Independent Authorized Service
Dealer, please visit the dealer locator at:
www.generac.com/Service/DealerLocator/
Model:
Serial:
Prod Date Week:
Volts:
LPV Amps:
NG Amps:
Hz:
Phase:
Controller P/N:
(000005)
WARNING
California Proposition 65. This product contains or
emits chemicals known to the state of California to
cause cancer, birth defects, and other reproductive
harm.
(000004)
WARNING
California Proposition 65. Engine exhaust and some
of its constituents are known to the state of California
to cause cancer, birth defects, and other reproductive
harm.

Owner’s Manual for 60 Hz EcoGen™ Generators iii
Section 1: Safety Rules & General
Information
Introduction ..........................................................1
Read This Manual Thoroughly ....................................1
Safety Alerts .........................................................1
How to Obtain Service .................................................1
Safety Rules .........................................................2
General Hazards .........................................................2
Exhaust Hazards .........................................................3
Electrical Hazards .......................................................3
Fire Hazards ................................................................4
Explosion Hazards ......................................................4
Section 2: General Information
EcoGen Operating Principle ...............................5
Benefits .......................................................................5
How It Works ...............................................................5
Startup .........................................................................5
Normal Running ..........................................................5
Small Load Changes ...................................................5
Large Load (Not Overload) ..........................................5
Automatic Voltage Regulator (AVR) Cooling Fans ......5
The Generator ......................................................6
Specifications ......................................................7
Generator ....................................................................7
Engine .........................................................................7
Protection Systems .............................................8
Emission Information ..........................................8
Fuel Requirements ..............................................8
Battery Requirements .........................................8
Battery Charger ....................................................8
Engine Oil Requirements ....................................8
Activating the Generator .....................................9
Replacement Parts ..............................................9
Accessories ..........................................................9
Section 3: Operation
Site Prep Verification .........................................11
Generator Enclosure .........................................11
Opening the Lid .........................................................11
Intake Side Panel Removal .......................................12
Main Line Circuit Breaker (Generator Disconnect) ....12
LED Indicator Lights ..................................................12
Control Panel Interface ..................................... 13
USB Port for Firmware Updates ................................13
Using the AUTO/OFF/MANUAL Interface ........ 13
Interface Menu Displays ................................... 13
The LCD Panel ..........................................................13
Menu System Navigation ..........................................14
Battery Charger ................................................. 16
Automatic Sequence of
Operation ........................................................... 16
Cranking ....................................................................16
Cold Smart Start ........................................................16
Shutting Generator Down While Under Load Or
During An Extended Run .................................. 16
To turn the generator OFF (while running in AUTO and
online): ......................................................................16
To turn the generator back ON: .................................16
Section 4: Maintenance
Maintenance ....................................................... 23
Preparing for Maintenance ............................... 23
Performing Scheduled Maintenance ............... 23
Maintenance Log ............................................... 24
Checking Engine Oil Level ............................... 25
Engine Oil Requirements ..........................................25
Changing the Oil and Oil Filter ......................... 26
EcoGen Oil System Drain Pump Kit Parts List ..........26
EcoGen Oil System Drain Pump Assembly ..............26
EcoGen Oil Change Procedure .................................27
Replacing the Engine Air Filter ........................ 28
Replacing the AVR Filter .................................. 28
Maintaining the Spark Plugs ............................ 29
Valve Clearance Adjustment ............................ 29
Check Valve Clearance .............................................29
Adjust Valve Clearance .............................................30
Battery Maintenance ......................................... 31
Cleaning the Sediment Trap ............................. 31
Attention After Submersion ............................. 32
Table of Contents

Table of Contents
iv Owner’s Manual for 60 Hz EcoGen™ Generators
Corrosion Protection .........................................32
Remove From, and Return To
Service Procedure .............................................32
Remove From Service .............................................. 32
Return to Service ...................................................... 32
Section 5: Troubleshooting / Quick
Reference Guide
Generator Troubleshooting ..............................35
Quick Reference Guide .....................................36
AVR Troubleshooting ........................................38
AVR Diagnostics ................................................40

Safety Rules & General Information
Owner’s Manual for 60 Hz EcoGen™ Generators 1
Section 1: Safety Rules & General Information
Introduction
Thank you for purchasing this compact, high
performance, air-cooled, engine-driven generator. It is
designed to automatically supply electrical power to
operate critical loads during a normal power source
failure.
As supplied from the factory, this generator is designed to
work in off-grid applications.
In off-grid applications as a part of an alternative energy
system, the generator starts when the inverter/battery
charger detects the normal power source voltage has
dropped below a preset level. The generator powers the
inverter, and once the voltage level of the normal power
source rises to an acceptable level, the generator is shut
down. Another off-grid application would be for use in
remote locations such as for pumping water for a village
or campground, or for livestock.
The unit is factory installed in an all-weather metal
enclosure and is intended for outdoor installation only.
The generator can be operated using either natural gas
(NG) or vapor withdrawn liquid propane (LP).
NOTE: When sized properly, this generator is suitable for
supplying typical residential loads such as induction
motors (sump pumps, refrigerators, air conditioners,
furnaces, etc.), electronic components (computer,
monitor, TV, etc.), lighting loads and microwaves, or
loads less than 10 kW or 2 hp.
The information in this manual is accurate based on
products produced at the time of publication. The
manufacturer reserves the right to make technical
updates, corrections, and product revisions at any time
without notice.
Read This Manual Thoroughly
If any portion of this manual is not understood, contact
the nearest Independent Authorized Service Dealer
(IASD) for starting, operating, and servicing procedures.
This manual must be used in conjunction with the
appropriate installation manual.
SAVE THESE INSTRUCTIONS: The manufacturer
suggests that this manual and the rules for safe operation
be copied and posted near the unit installation site.
Safety should be stressed to all operators and potential
operators of this equipment.
Safety Alerts
Throughout this publication and on tags and decals
affixed to the generator, DANGER, WARNING, and
CAUTION blocks are used to alert personnel to special
instructions about a particular operation that may be
hazardous if performed incorrectly or carelessly. Observe
them carefully. Their definitions are as follows:
NOTE: Notes provide additional information important to
a procedure or component.
These safety alerts cannot eliminate the hazards they
indicate. Observing safety precautions and strict compli-
ance with the special instructions while performing the
action or service are essential to preventing accidents.
The operator is responsible for proper and safe use of
the equipment. The manufacturer strongly recommends
that if the operator is also the owner, to read the owner’s
manual and thoroughly understand all instructions before
using this equipment. The manufacturer also strongly
recommends instructing other users to properly start and
operate the unit. This prepares them if they need to
operate the equipment in an emergency.
How to Obtain Service
Contact an IASD for assistance when the generator
requires servicing or repairs. Service technicians are
factory-trained and are capable of handling all service
needs. Please visit the dealer locator at:
www.generac.com/Service/DealerLocator/ to locate
the nearest IASD.
When contacting a dealer about parts and service,
always supply the complete model and serial numbers of
the unit as given on its data plate (decal), which is
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

Safety Rules & General Information
2Owner’s Manual for 60 Hz EcoGen™ Generators
located on the generator. See Figure 2-1 for decal
location. Record the model and serial numbers in the
spaces provided on the inside front cover of this manual.
Safety Rules
Study these SAFETY RULES carefully before installing,
operating, or servicing this equipment. Become familiar
with this owner’s manual and with the unit. The generator
can operate safely, efficiently, and reliably only if it is
properly installed, operated, and maintained. Many
accidents are caused by failing to follow simple and
fundamental rules or precautions.
The manufacturer cannot anticipate every possible
circumstance that might involve a hazard. The alerts in
this manual and on tags and decals affixed to the unit are
not all-inclusive. If using a procedure, work method, or
operating technique the manufacturer does not
specifically recommend, verify that it is safe for others
and does not render the generator unsafe.
General Hazards
DANGER
Accidental start-up. Disconnect power and render
unit inoperable before performing service work.
Failure to do so will result in death or serious injury.
(000344)
(000190)
DANGER
Loss of life. Property damage. Installation must always
comply with applicable codes, standards, laws and
regulations. Failure to do so will result in death
or serious injury.
(000209a)
WARNING
This product is not intended to be used in
a critical life support application. Failure to
adhere to this warning could result in
death or serious injury.
WARNING
This unit is not intended for use as a prime power
source. It is intended for use as an intermediate power
supply in the event of temporary power outage only.
See individual unit specifications for required
maintenance and run times pertaining to use. (000247)
(000130)
WARNING
Accidental Start-up. Disconnect the negative battery
cable, then the positive battery cable when working
on unit. Failure to do so could result in death
or serious injury.
(000182)
WARNING
(000187)
WARNING
(000155)
WARNING
Only a trained and licensed electrician should perform
wiring and connections to unit. Failure to follow proper
installation requirements could result in death, serious
injury, and damage to equipment or property.
(000115)
WARNING
Moving Parts. Do not wear jewelry when
starting or operating this product. Wearing
jewelry while starting or operating this product
could result in death or serious injury.
(000111)
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces
could result in severe burns or fire.
(000146)
WARNING
Equipment and property damage. Do not alter
construction of, installation, or block ventilation for
generator. Failure to do so could result in unsafe
operation or damage to the generator.

Safety Rules & General Information
Owner’s Manual for 60 Hz EcoGen™ Generators 3
•Inspect the generator regularly, and contact the
nearest IASD for parts needing repair or
replacement.
Exhaust Hazards
•The generator must be installed and operated
outdoors only.
Electrical Hazards
WARNING
Risk of injury. Do not operate or service this
machine if not fully alert. Fatigue can impair the
ability to service this equipment and could result
in death or serious injury. (000215)
WARNING
Environmental Hazard. Always recycle batteries at an
official recycling center in accordance with all local
laws and regulations. Failure to do so could result in
environmental damage, death or serious injury.
(000228)
WARNING
Injury and equipment damage. Do not use
generator as a step. Doing so could result in falling,
damaged parts, unsafe equipment operation,
and could result in death or serious injury. (000216)
Asphyxiation. Running engines produce
carbon monoxide, a colorless, odorless,
poisonous gas. Carbon monoxide, if not
avoided, will result in death or serious injury.
(000103)
DANGER
(000178a)
Asphyxiation. Always use a battery operated carbon
monoxide alarm indoors and installed according to
the manufacturer’s instructions. Failure to do so
could result in death or serious injury.
WARNING
(000146)
WARNING
Equipment and property damage. Do not alter
construction of, installation, or block ventilation for
generator. Failure to do so could result in unsafe
operation or damage to the generator.
(000144)
DANGER
Electrocution. Contact with bare wires,
terminals, and connections while generator
is running will result in death or serious injury.
(000150)
DANGER
Electrocution. Never connect this unit to the electrical
system of any building unless a licensed electrician
has installed an approved transfer switch. Failure to
do so will result in death or serious injury.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000152)
DANGER
Electrocution. Verify electrical system is
properly grounded before applying power.
Failure to do so will result in death or serious
injury.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.

Safety Rules & General Information
4Owner’s Manual for 60 Hz EcoGen™ Generators
Fire Hazards
•Comply with regulations the Occupational Safety
and Health Administration (OSHA) has
established. Also verify that the generator is
installed in accordance with the manufacturer’s
instructions and recommendations. Following
proper installation, do nothing that might alter a
safe installation and render the unit in
noncompliance with the aforementioned codes,
standards, laws, and regulations.
Explosion Hazards
WARNING
Fire hazard. Do not obstruct cooling and
ventilating airflow around the generator. Inadequate
ventilation could result in fire hazard, possible
equipment damage, death or serious injury. (000217)
WARNING
Fire and explosion. Installation must comply
with all local, state, and national electrical
(000218)
building codes. Noncompliance could result in unsafe
operation, equipment damage, death or serious injury.
WARNING
Fire hazard. Use only fully-charged fire
(000219)
extinguishers rated “ABC” by the NFPA. Discharged or
improperly rated fire extinguishers will not extinguish
electrical fires in automatic standby generators.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
to use required safety equipment could result
in death or serious injury. (000257)
Electrocution. Refer to local codes and
standards for safety equipment required when
working with a live electrical system. Failure
(000147)
WARNING
Risk of Fire. Unit must be positioned in a
manner that prevents combustible material
accumulation underneath. Failure to do so
could result in death or serious injury.
(000192)
DANGER
(000151)
DANGER
Connection of fuel source must be done by a qualified
professional technician or contractor. Incorrect installation
of this unit will result in death, serious injury, and damage
to equipment and property damage.
(000174)
DANGER
Risk of fire. Allow fuel spills to completely dry
before starting engine. Failure to do so will
result in death or serious injury.
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.

General Information
Owner’s Manual for 60 Hz EcoGen™ Generators 5
Section 2: General Information
EcoGen Operating Principle
Benefits
The 15 kW EcoGen generator brings exciting new
technology to the Home Standby generator product. The
generator is significantly more fuel-efficient than constant
speed generators at normal loads, provides premium
power quality, and is significantly quieter while operating
at normal loads.
•Quieter operation - 3 dB with improved tonal qualities
under normal loads
•Cleanest Standby power available with 1.5% THD
•Significant fuel savings: more fuel efficient under
normal loads
•Lower operating speed of 2700 rpm at low loads
•Tuned exhaust system to further lower sound levels
•Variable Speed / Constant Frequency operation
How It Works
In an off-grid solution, the generator is an important
source of backup power when other resources are
insufficient for the demand, improving overall system
reliability.
1. Sun (solar cells) and/or wind (turbines) generate
DC current.
2. This is fed to the inverter charger and then on to
the battery bank.
3. The inverter takes DC power from the battery bank,
converts it to AC, and then sends the current to the
AC electrical panel.
4. If there is no solar or wind gain and the battery
bank level drops below a preset threshold, the
inverter automatically signals the generator to start.
5. The generator feeds AC power to the inverter,
which in turn sends power to the electric panel and
recharges the battery bank to an acceptable level.
Startup
When the generator starts, the engine speed gradually
increases to 3600 RPM to produce maximum power. This
ensures that there is sufficient power to carry the load on
start-up. The engine RPM then gradually decreases to a
speed appropriate for the attached load.
For example, if there is no load, the engine speed
decreases to approximately 2700 RPM. The time it takes
to decrease to 2700 RPM is approximately 4–5 minutes.
Since the ramp rate is linear, less time would be required
for it to decrease to only 3400 RPM.
During startup, as the engine speed increases to 3600
RPM, the Automatic Voltage Regulator (AVR) electronics
perform a self test involving an overall system check of
the unit. If a fault is detected, the unit shuts down and
displays an alarm.
Normal Running
The engine operates between 2700 RPM–3600 RPM
depending on the attached load. When the load
increases or decreases, the speed increases or
decreases accordingly.
Small Load Changes
The system is designed to maintain the current engine
speed for small load changes. Larger load changes result
in a change in engine speed to appropriately handle the
load.
Large Load (Not Overload)
The engine always runs at a speed appropriate for the
attached load. Typical loads up to 10 kW or 2 hp can be
wired directly. The engine speed remains at 3600 RPM
for a programmable time (20 minutes default) and then
decreases to the speed appropriate for the attached load.
The programmable time can be changed by the dealer to
prevent annoying increases and decreases in engine
speed if large loads turn on and off frequently.
If natural gas is the selected fuel type, then all loads up to
9 kW can be wired directly.
Automatic Voltage Regulator (AVR) Cooling Fans
The system is equipped with two fans to cool the AVR
electronics. The primary fan is powered by AC during
operation. The secondary fan is powered by 12V DC
through the controller. The fans are monitored during
operation and if a failure occurs, an alarm is displayed.
The secondary fan continues to operate for up to 80
minutes after the generator is shut down. Proper cooling
must occur before removing battery connections for
maintenance or other service activity.
NOTE: The AVR cooling air inlet includes a filter. Verify
the filter is installed and properly seated at time the unit is
installed. Check the filter at regular maintenance intervals
to verify proper airflow.
(000111)
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.

General Information
6Owner’s Manual for 60 Hz EcoGen™ Generators
The Generator
Figure 2-1. Components and Control Locations
A. AVR E. Control Panel J. Oil Tank N. Sediment Trap
B. AVR Filter F. Battery Compartment
(Battery not supplied)
K. Oil Fill Cap/Oil dip
stick
O. Fuel Regulator
C. Main Line Circuit Breaker (Generator
Disconnect)
G. Exhaust Enclosure L. Oil Filter P.
Q.
Fuel Inlet
Data Plate Location
D. Airbox with Air Cleaner H. Status LED Indicators M. Composite Base R. Lock with Cover
003603
R
D
F
C
E
G
R
H
J
L
K
M
B
N
O
P
Q
A

General Information
Owner’s Manual for 60 Hz EcoGen™ Generators 7
Specifications
Generator
Engine
The specification sheet for this generator was included in
the documentation provided with the unit at the time of
purchase. For additional copies, consult your local
Independent Authorized Service Dealer.
Model 15 kW EcoGen
Rated Voltage 240
Rated Maximum Load
Current (Amps) at 240 Volts
(LP and NG)*
62.5
Main Circuit Breaker 70 Amp
Phase 1
Rated AC Frequency 60 Hz
Battery Requirement 12 Volts, Group 26R 540 CCA Minimum or Group 35AGM 650 CCA Minimum
Unit Weight in Lbs. (kilos) 471 (213.6)
Enclosure Aluminum
Normal Operating Range This unit is tested in accordance to UL 2200 standards with an operating
temperature of -20º F (-29º C) to 122º F (50º C). For areas where temperatures fall
below 32º F (0º C) a cold weather kit is recommended. When operated above 77º
F (25º C) there may be a decrease in engine power. Please reference the engine
specifications section.
These generators are rated in accordance with UL 2200, Safety Standard for Stationary Engine Generator
Assemblies, and CSA-C22.2 No. 100-04 Standard for Motors and Generators.
Model 15 kW EcoGen
Type of Engine G-Force 1000 Series
Number of Cylinders 2
Displacement 999 cc
Cold Valve Clearance 0.002”-0.004” (0.05 mm - 0.1 mm)
Cylinder Block Aluminum w/Cast Iron Sleeve
Recommended Spark
Plug
RC12YC
Spark Plug Gap 0.040 in. (1.02 mm)
Starter 12 VDC
Oil Capacity Including
Filter
Approx. 3.75 Quarts / 3.55 Liters
Recommended Oil Filter Part #070185E
Recommended Air Filter Part #0J8478
Maximum wattage and current is subject to and limited by such factors as fuel BTU/joules content, ambient
temperature and altitude. Maximum power decreases about 3.5 percent for each 1,000 feet (304.8 meters) above
sea level, and also will decrease about 1 percent for each 10° F (6º C) above 60º F (15º C) ambient temperature.

General Information
8Owner’s Manual for 60 Hz EcoGen™ Generators
Protection Systems
The generator may need to run for long periods of time
with no operator present to monitor the engine/generator
conditions. The generator is equipped with protection
systems to automatically shut down the unit to protect
against potentially damaging conditions. Some of these
systems include:
Alarms:
Warnings:
The control panel contains a display which alerts the
operator when a fault condition occurs. The above list is
not all inclusive. See Operation for more information
about alarms and control panel operation.
NOTE: A warning will indicate a condition on the
generator that should be addressed, but will not shut the
generator down. An alarm will shut the generator down to
protect the system from any damage. In the event of an
alarm, an owner can clear the alarm and restart the
generator prior to contacting an IASD. If the intermittent
issue occurs again, contact an IASD.
Emission Information
The United States Environmental Protection Agency (US
EPA) (and California Air Resources Board (CARB), for
engines/equipment certified to California standards)
requires that this engine/equipment complies with
exhaust and evaporative emissions standards. Locate
the emissions compliance decal on the engine to
determine applicable standards. For emissions warranty
information, please reference the included emissions
warranty. Follow the maintenance specifications in
Maintenance to ensure that the engine complies with the
applicable emissions standards for the duration of the
product’s life.
This generator is certified to operate on Liquid Propane
Vapor fuel or pipeline Natural Gas.
The Emission Control System code is EM (Engine
Modification). The Emission Control System on this
generator consists of the following:
Fuel Requirements
The engine has been fitted with a dual fuel carburetion
system. The unit will run on natural gas or LP gas
(vapor), but it has been factory set to run on natural gas.
The fuel system will be configured for the available fuel
source during installation.
Recommended fuels should have a BTU content of at least
1000 BTUs per cubic foot (37.26 megajoules per cubic
meter) for natural gas, or at least 2500 BTUs per cubic foot
(93.15 megajoules per cubic meter) for LP gas (vapor).
NOTE: If converting to LP gas from natural gas, a
minimum LP tank size of 250 gal (946 L) is
recommended. See the installation manual for complete
procedures and details.
Battery Requirements
12 volts, Group 26R-540CCA minimum or Group 35AGM-
650CCA minimum (not included with unit.) See
Maintenance for proper battery maintenance procedures.
Battery Charger
The battery charger is integrated into the control panel
module in all models. It operates as a smart charger,
which ensures output charging levels are safe and
continuously optimized to promote maximum battery life.
Engine Oil Requirements
See Engine Oil Requirements in the Maintenance
section for proper oil viscosity.
•High Temperature
•Low Oil Pressure
•Overcrank
•Overspeed
•Overvoltage
•Undervoltage
•Overload
•Underspeed
•RPM Sensor Loss
•Controller Fault
•Wiring Error
•Fuse Problem
•Stepper Overcurrent
•Charger Warning
•Charger Missing AC
•Low Battery
•Battery Problem
•USB Warning
•Download Failure
System Components
Air Induction - Intake Manifold
- Air Cleaner
Fuel Metering - Carburetor and Mixer Assembly
- Fuel Regulator
Ignition - Spark Plug
- Ignition Module
Exhaust - Exhaust Manifold
- Muffler
(000105)
DANGER
Explosion and Fire. Fuel and vapors are
extremely flammable and explosive. Add fuel
in a well ventilated area. Keep fire and spark
away. Failure to do so will result in death
or serious injury.

General Information
Owner’s Manual for 60 Hz EcoGen™ Generators 9
Activating the Generator
The generator should be activated upon initial start-up.
See the installation manual for complete instructions.
Replacement Parts
Accessories
NOTE: Performance enhancing accessories are available for air-cooled generators. Contact an IASD or visit
www.generac.com for additional information on replacement parts, accessories, and extended warranties. See also
http://www.ordertree.com/generac/air-cooled-homestandby-generators/.
Description 15 kW EcoGen
26R Exide Battery 0H34215
Spark Plug 0G0767A
Oil Filter 070185E
Air Filter 0J8478
Control Panel Fuse 0D7178T
AVR Air filter 0K3054
Rotor Brushes 0J8318
Accessory Description
Cold Weather Accessories*—
•Battery Pad Warmer
•Oil Warmer
•Breather Warmer
* each sold separately
•Recommended in areas where temperatures fall below 0 °F (-18 °C).
(Not necessary for use with AGM-style batteries)
•Recommended in areas where temperatures fall below 0 °F (-18 °C).
•Recommended in areas where heavy icing occurs.
Scheduled Maintenance Kit Includes all pieces necessary to perform maintenance on the generator along with oil
recommendations.
Touch-Up Paint Kit Very important to maintain the look and integrity of the generator enclosure. This kit includes
touch-up paint and instructions.
Wireless Local Monitor The Wireless Local Monitor is completely wireless and battery powered, and provides owners
with instant generator status updates without ever leaving the house. Status lights (red,
yellow, and green) alert owners when the generator needs attention. Magnetic backing
permits refrigerator mounting and gives a 600 ft (183 m) line of sight communication.

General Information
10 Owner’s Manual for 60 Hz EcoGen™ Generators
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Operation
Owner’s Manual for 60 Hz EcoGen™ Generators 11
Section 3: Operation
Site Prep Verification
The generator must be installed so that airflow into and
out of the generator is not impeded. Verify that all shrubs
or tall grasses within 3 ft (0.91 m) of the intake and
discharge louvers on the sides of the enclosure have
been removed. Install the generator on high ground
where water levels will not rise and endanger it. This unit
should not operate in or be subjected to standing water.
Verify that all potential water sources such as water
sprinklers, roof run-off, rain gutter downspouts, and sump
pump discharges are directed away from the generator
enclosure.
Generator Enclosure
The lid will be locked. A set of keys is attached to the
intake side of the generator.
1. Cut the plastic bag to remove the keys.
2. Use the keys to open the lid of the generator.
NOTE: The enclosed keys provided with this unit are
intended for service personnel use only.
Opening the Lid
Two locks secure the lid—one on each side (A in Figure
3-1). Open the protective rubber cap to access the
keyhole, and press down on the lid above the side lock
and unlock the latch to properly open the lid.
Repeat for the other side. The lid may appear stuck if
pressure is not applied from the top.
NOTE: Always verify that the side locks are unlocked
before attempting to lift the lid.
Removing the Front Access Panel
Remove the front access panel by lifting it straight up and
out once the lid is open.
Always lift the front access panel straight up before
pulling it away from the enclosure (B and C in Figure 3-
1). Do not pull the panel away from the enclosure before
lifting up (D in Figure 3-1).
Figure 3-1. Side Lock Location and Front Panel Removal
DANGER
Accidental start-up. Disconnect power and render
unit inoperable before performing service work.
Failure to do so will result in death or serious injury.
(000344)
001797
A
A
BD
C

Operation
12 Owner’s Manual for 60 Hz EcoGen™ Generators
Intake Side Panel Removal
See Figure 3-2. The intake side panel (A) must be
removed to access the battery compartment, fuel
regulator, and sediment trap.
1. Raise the lid and remove the front panel.
2. Use an Allen wrench to remove two mounting
screws (B) and the L-bracket screw (C).
3. Lift the intake panel up and away from the
generator.
NOTE: Always lift the intake side panel straight up
before pulling away from enclosure. Do not pull the panel
away from the enclosure before lifting up (D).
Figure 3-2. Intake Side Panel Removal
Main Line Circuit Breaker (Generator
Disconnect)
This is a 2-pole breaker rated according to relevant
specifications. See “A” in Figure 3-3.
The breaker can be locked in the OFF (OPEN) position
for security. Use an appropriately-sized padlock (not
included) with a shackle long enough to pass through
both lock tabs (B).
Figure 3-3. Main Breaker
NOTE: DO NOT lock out the MLCB during normal
generator operation. Doing so will compromise automatic
standby functionality.
LED Indicator Lights
Figure 3-4. LED Indicator Lights
See Figure 3-4. Three LEDs are visible behind a
translucent lens on the generator side panel. These
LEDs indicate the operating status of the generator.
•Green LED “Ready” light (A) is illuminated when
the control panel button is in the AUTO position.
The LED flashes when the connected load is
running under generator power.
•Red LED “Alarm” light (B) is illuminated when the
generator is OFF or a fault is detected. Contact an
IASD.
•Yellow LED “Maintenance” light (C) is illuminated
when scheduled maintenance is due.
NOTE: Yellow Maintenance or Warning LED may be on
at the same time as either the Red or Green LED.
002961
A
BD
C
001810
BA
001791
BCA

Operation
Owner’s Manual for 60 Hz EcoGen™ Generators 13
Control Panel Interface
See Figure 3-5. The control panel interface (A) is located
under the lid of the enclosure. Verify that both the left and
right side locks are unlocked before attempting to lift the
lid of the enclosure. Open the lid as directed in Opening
the Lid.
The 7.5A fuse is located beneath the rubber cover (B) to
the right of the control panel.
Verify that both the left and right side locks are securely
out of the way before closing the unit.
Figure 3-5. Generator Control Panel
All appropriate panels must be in place during any
operation of the generator. This includes operation by a
servicing technician while conducting troubleshooting
procedures.
USB Port for Firmware Updates
A USB Port is located beneath the rubber cover (B) and
is provided for firmware updates. Firmware updates must
be performed by an IASD.
NOTE: The USB port is intended for use with a USB
flash drive only. The USB port is not intended for
charging or powering any device such as phones or LED
lights. Do not connect any consumer electronics to the
USB port.
Using the AUTO/OFF/MANUAL
Interface
NOTE: Damage caused by mis-wiring of the
interconnect wires is not warrantable.
Interface Menu Displays
The LCD Panel
001798
A
B
Button Description of Operation
AUTO
This button activates fully automatic system
operation.
The Green LED on this button will flash if
running in Automatic mode and the connected
loads are running under generator power.
Transfer to standby power occurs if remote two
wire start is ON (CLOSED).
OFF This button shuts down the engine and
prevents automatic operation of the unit.
MANUAL
This button cranks and starts the generator.
The blue LED on this button will flash if running
in manual mode and the connected loads are
running under generator power.
Feature Description
HOME
page
Default page that is displayed if no buttons are
pressed for 60 seconds. Normally shows
current status message and the current date
and time. The highest priority active alarm/
warning is automatically posted on this page,
as well as flashing the backlight when such a
condition is detected. In the case of multiple
alarms/warnings, only the first message will be
displayed. Press the OFF button then enter to
clear an alarm. Warnings are cleared when the
issue is corrected and cannot be cleared with
any button.
Display
Backlight
Normally off. The backlight will automatically
light and remain on for 30 seconds if the
operator presses any button.
MAIN
MENU
page
Allows the operator to navigate to all other
pages or sub-menus by using the arrow keys
and the ENTER button. Page can be accessed
at any time with several presses of the
dedicated ESCAPE button. Each press of the
ESCAPE button takes the operator to the
previous menu until the MAIN MENU displays.
This page contains information for - History;
Status; Edit; Debug.

Operation
14 Owner’s Manual for 60 Hz EcoGen™ Generators
Menu System Navigation
To get to the MENU, use the ESCAPE button from any page. You may need to press the ESCAPE button several times
before reaching the MENU page. Navigate to the desired menu by using the ↑/↓buttons. When the desired menu is
displayed and flashing, press the ENTER button.
Figure 3-6. Navigation Menu
ECOGEN HSB MENU MAP
“Run Log”
ESC
ENTER
ENTER
SYSTEM
BATTERY
DATE/TIME
SUB MENUS
HISTORY
EDIT
Firmware Update
 Press Enter 
ESC
ESC
ENTER
Current Date/Time
 2/12/13 12:22 
ESC
ENTER
ENTER
ESC
ESC
ESC
ENTER
ESC
ESC
ENTER
ENTER
ESC
ENTER
ENTERENTER
ENTER
ENTER
ENTER
ESC
Switched to “OFF”
Hours of Protection
0 (H)
Language
 English 
Fuel Selection
 NG or LP 
Possible Message(s)
Corrupted File
Invalid File
File Not Found
Unsupported Device
Firmware Update
 Insert USB 
“Alarm Log”
- Alarm Log +
- Run Log +
- 1 thru 50 +
- 1 thru 50 +
Warning Message(s)
"Low Battery"
"FIRMWARE ERROR-9"
"Fuel Pressure"
"Battery Problem"
"Charger Warning"
"Charger Missing AC"
"Overload Warning"
"Overload Cooldown"
"SEEPROM ABUSE"
"USB Warning"
"Download Failure"
Running Manual
Running-Remote Start
Switched Off
Stopped - Auto
Stopped - Alarm
Alarm Message(s)
"High Engine Temp."
"Low Oil Pressure"
"Overcrank"
"Overspeed"
"RPM Sense Loss"
"Underspeed"
"Internal Fault"
"FIRMWARE ERROR-7"
"WIRING ERROR"
"Over Voltage"
"Under Voltage"
"Overload Remove Load"
"Low Volts Remove Load"
"Stepper Over Current"
"Fuse Problem"
ESC
Select Min (0-59)
- 0 +
ESC
ESC
Select Hour (0-23)
- 14 +
Language
+ English -
Fuel Selection
+ NG or LP -
Language
+ Espanol -
Language
+ Francais -
+
-
+
-
Battery Condition
“Good” “Inspect Battery” or “Check Battery”
003602

Operation
Owner’s Manual for 60 Hz EcoGen™ Generators 15
Figure 3-7. Navigation Menu
UP ARROW = +
DOWN ARROW = -
MAINT
DEALER
EXAMPLE:
Inspect Battery 200 RnHr or 12/27/13
and
Next Maintenance 200 RnHr or 12/27/13
Current Date/Time
02/14/13 07:40
ESC
ESC
ENTER
ENTER
ESC ENTER
ESC ESC ESC
ENTER
ESC
MAINT
:
Maint. Log
Run Hrs
Scheduled
Select Month (1-12)
- 2 +
Run Hours (H)
0.0
ENTER
Select Date (1-31)
- 13 +
ENTER
Select Year (0-99)
- 13 +
ENTER
ENTER
Access Requires Password
"Current:V XXXX "
"USB: V XXXX"
"Are You Sure?"
"- Yes or No +"
ESC
ENTER
ESCENTER
ESCENTER
Select “Yes” then Press “Enter” to continue or Press
“ESCAPE” to escape out of updating.
During update process the Blue “Manual” light
flashes, then the Green “Auto” light flashes.
Sequence does this twice. When update is complete
the unit returns to Install Wizard menu.
When the controller powers up the very first screen
displays the version number for a few seconds.
When update is complete remove Thumb Drive, then
follow the Install Wizard Menu.
- 1 thru 50 +
"Battery Maintained"
"Schedule A Serviced"
"Schedule B Serviced"
"Maintenance Reset"
"Inspect Battery"
"Service Schedule A"
"Service Schedule B"
Language
+ Portuguese -
+
-
+
001382b

Operation
16 Owner’s Manual for 60 Hz EcoGen™ Generators
Battery Charger
NOTE: The battery charger is integrated into the control
module in all models.
The battery charger operates as a smart charger that
verifies:
•output is continually optimized to promote
maximum battery life.
•charging levels are safe.
NOTE: A warning is displayed on the LCD when the
battery needs service.
Automatic Sequence of
Operation
Cranking
The system will control the cyclic cranking as follows:
•16 second crank, seven (7) second rest, 16 second
crank, seven (7) second rest, followed by three (3)
additional cycles of seven (7) second cranks followed
by seven (7) second rests.
Cold Smart Start
The Cold Smart Start feature monitors the ambient
temperature and adjusts the warm-up delay upon start up
in AUTO mode based on prevailing conditions.
The generator will startup with the normal warm-up delay
of 5 seconds if the ambient temperature is at or above
the fixed temperature.
A check for proper output voltage build up will be
performed when the generator engine is started.
If some condition impedes normal voltage creation, such
as frost crystals or dust/dirt preventing a good electrical
connection, the start sequence will be interrupted so that
a cleaning cycle of the internal electrical connections can
be attempted.
The cleaning cycle is an extended warming up period
which lasts for several minutes while the normal
generator voltage output is determined to be low. During
this cycle, the generator controller will display “Warming
Up” on the display screen.
The generator controller display will show “Under
Voltage” if the cleaning cycle fails to clear the obstruction.
After several minutes, the alarm message can be
cleared, and the generator restarted.
If the problem persists, make no further attempts to start.
Contact an IASD.
Shutting Generator Down While
Under Load Or During An
Extended Run
Proceed as follows to turn the generator off during an
extended run to perform maintenance or conserve fuel:
To turn the generator OFF (while running in
AUTO and online):
1. Turn the MLCB (generator disconnect) on the gen-
erator to OFF (OPEN).
2. Allow generator to run approximately 1 minute for
proper cooling.
3. Press the OFF button on the controller.
To turn the generator back ON:
1. Put the generator into AUTO and allow to start and
warm-up for a few minutes.
2. Set the MLCB (generator disconnect) on the
generator to ON (CLOSED).
The system is now in automatic mode. The connected
loads can be engaged.
MANUAL •Will not transfer to generator if MLCB (generator disconnect) is OFF (OPEN).
•Will transfer to generator if MLCB (generator disconnect) is ON (CLOSED).
AUTO
•Will start and run when remote two-wire start is ON (CLOSED).
•The generator will shut down if the OFF button is pressed or a shutdown alarm is present.
•Once remote two-wire start is OFF (OPEN), the generator will shut down immediately (a
selectable cool down is provided; default is no cool down)