Generac Power Systems 10 kW LP User manual

SAVE THIS MANUAL FOR FUTURE REFERENCE
®
Owner’s Manual
60 Hz Air-Cooled Generators
10 kW to 26 kW
Para español, visita: http://www.generac.com/service-support/product-support-lookup
Pour le français, visiter : http://www.generac.com/service-support/product-support-lookup
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(888-436-3722)
(000209b)
WARNING
Loss of life. 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 Air-Cooled Generators
Use this page to record important information about this generator.
Record the information found on the 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, Figure 2-2, or Figure 2-
3. See Operation for directions on how to
open the top lid and remove the front panel.
Always supply the complete model and serial
numbers of the unit when contacting an Inde-
pendent Authorized Service Dealer (IASD)
about parts and service.
Operation and Maintenance: Correct main-
tenance and care of the unit ensures a mini-
mum number of problems, and keeps
operating expenses at a minimum. It is the
operator’s responsibility to perform all safety
inspections, to verify all maintenance for safe
operation is performed promptly, and to have
the equipment inspected 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
IASD for assistance. Authorized service tech-
nicians are factory-trained and are capable of
handling all service needs. To locate the near-
est IASD, please visit the dealer locator at:
www.generac.com/Dealer-Locator.
Model:
Serial:
Production Date:
Volts:
LPV Amps:
NG Amps:
Hz:
Phase:
Controller P/N:
STA MAC ID:
SSID:
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.

Owner’s Manual for 60 Hz Air-Cooled Generators iii
Table of Contents
Section 1: Safety Information
Introduction ..................................... 1
Read This Manual Thoroughly ............1
Safety Rules.................................... 1
How to Obtain Service ........................2
General Hazards............................. 2
Exhaust Hazards............................. 2
Electrical Hazards ........................... 3
Fire Hazards.................................... 3
Explosion Hazards .......................... 3
Battery Hazards .............................. 4
Section 2: General Information
Generator Components and
Control Locations ............................ 5
Data Decals..................................... 8
Specifications .................................. 9
Generator ............................................9
Engine .................................................9
Protection Systems ....................... 10
Emissions...................................... 10
Fuel Requirements........................ 10
Battery Requirements ................... 10
Battery Charger............................. 11
Engine Oil Requirements .............. 11
Activating the Generator ............... 11
Wi-Fi Module................................. 11
Replacement Parts........................ 11
Accessories................................... 11
Section 3: Operation
Site Prep Verification..................... 13
Generator Enclosure..................... 13
Opening the Lid .................................13
Front Access Panel Removal ............13
Intake Side Panel Removal ...............14
Main Line Circuit Breaker (Generator
Disconnect) .......................................14
LED Indicator Lights ..........................14
Auxiliary Shutdown Switch............ 15
Control Panel Interface ................. 15
Using the AUTO/OFF/MANUAL
Buttons.......................................... 15
Operating Modes........................... 16
Interface Menu Displays................ 16
LCD Panel .........................................16
Menu System Navigation .............. 17
Setting the Exercise Timer............ 19
Battery Charger ............................. 19
Manual Transfer Operation............ 19
Transfer to Generator Power
Source ...............................................19
Transfer to Utility Power Source ........20
Automatic Transfer Operation ....... 20
Automatic Sequence of
Operation....................................... 20
Utility Failure ......................................20
Cranking ............................................20
Cold Smart Start ................................20
Cleaning Cycle ..................................21
Load Transfer ....................................21
Shutting Generator Down While Under
Load or During a Utility Outage ..... 21
Section 4: Maintenance
Maintenance .................................. 22
Preparing for Maintenance ............ 22
Performing Scheduled
Maintenance .................................. 22
Service Schedule........................... 23
Maintenance Log ...................................23
Checking Engine Oil Level ............ 24
Engine Oil Requirements ..................24
Changing the Oil and Oil Filter ...... 24
Servicing the Air Cleaner............... 25
Spark Plug(s)................................. 26
Valve Clearance Adjustment ......... 26
Checking Valve Clearance ................26
Adjusting Valve Clearance ................27
Battery Maintenance...................... 27
Inspecting the Battery ........................28
Cleaning the Sediment Trap.......... 29
Post Maintenance Checks............. 29
Performing Fuel System Leak Test ...29
Attention After Submersion............ 30
Corrosion Protection...................... 30
Remove From and Return To
Service Procedure ......................... 30
Remove From Service .......................30
Return to Service ...............................30
Section 5: Troubleshooting /
Quick Reference Guide
Generator Troubleshooting............ 32
Quick Reference Guide ................. 34

Safety Information
1 Owner’s Manual for 60 Hz Air-Cooled Generators
Section 1: Safety Information
Introduction
Thank you for purchasing this compact, high
performance, air-cooled, engine-driven gen-
erator. It is designed to automatically supply
electrical power to operate critical loads
during a utility power failure.
This unit is factory installed in an all-weather,
metal enclosure intended exclusively for out-
door installation. This generator will operate
using either vapor withdrawn liquid propane
(LP) or natural gas (NG).
NOTE: This generator is suitable for supplying
typical residential loads such as induction
motors (sump pumps, refrigerators, air condi-
tioners, furnaces, etc.), electronic components
(computer, monitor, TV, etc.), lighting loads,
and microwaves, when sized correctly. This
unit is equipped with a Wi-Fi® module, which
allows the generator owner to monitor genera-
tor status from anywhere they have Internet
access.
NOTE: Wi-Fi® is a registered trademark of Wi-
Fi Alliance®.
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 section of this manual is not under-
stood, contact the nearest Independent
Authorized Service Dealer (IASD) or Gen-
erac Customer Service at 1-888-436-3722
(1-888-GENERAC), or visit www.gen-
erac.com for starting, operating, and servic-
ing procedures. The owner is responsible for
correct maintenance and safe use of the unit.
This manual must be used in conjunction with
all other supporting product documentation
supplied with the product.
SAVE THESE INSTRUCTIONS for future ref-
erence. This manual contains important
instructions that must be followed during
placement, operation, and maintenance of
the unit and its components. Always supply
this manual to any individual that will use this
unit, and instruct them on how to correctly
start, operate, and stop the unit in case of
emergency.
Safety Rules
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 that the manufacturer
does not specifically recommend, verify that
it is safe for others and does not render the
equipment unsafe.
Throughout this publication, and on tags and
decals affixed to the unit, DANGER, WARN-
ING, CAUTION, and NOTE blocks are used
to alert personnel to special instructions
about a particular operation that may be haz-
ardous if performed incorrectly or carelessly.
Observe them carefully. Alert definitions are
as follows:
NOTE: Notes contain additional information
important to a procedure and will be found
within the regular text of this manual.
These safety alerts cannot eliminate the haz-
ards that they indicate. Common sense and
strict compliance with the special instructions
while performing the action or service are
essential to preventing accidents.
(000100a)
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
(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 Information
Owner’s Manual for 60 Hz Air-Cooled Generators 2
How to Obtain Service
When the unit requires servicing or repairs,
contact Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) or visit
www.generac.com for assistance.
When contacting Generac Customer Service
about parts and service, always supply the
complete model and serial number of the unit
as given on its data decal located on the unit.
Record the model and serial numbers in the
spaces provided on the front cover of this
manual.
General Hazards
•Inspect generator regularly, and contact the
nearest IASD for parts needing repair or
replacement.
Exhaust Hazards
(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.
(000191)
DANGER
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000209b)
WARNING
Loss of life. 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.
(000247a)
Equipment damage. 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. Doing so
could result in death, serious injury, and equipment damage.
WARNING
(000130)
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.
WARNING
(000182a)
WARNING
Equipment damage. Only qualified service personnel may
install, operate, and maintain this equipment. Failure to
follow proper installation requirements could result in death,
serious injury, and equipment or property damage.
(000187)
WARNING
Electrocution. Potentially lethal voltages are generated
by this equipment. Render the equipment safe before
attempting repairs or maintenance. Failure to do so
could result in death or serious injury.
(000155a)
WARNING
Electric shock. 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 equipment or property damage.
(000115)
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.
WARNING
(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.
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to
operate or service this equipment and could result in
death or serious injury. (000215a)
WARNING
WARNING
(000228)
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.
(000216)
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.
(000103)
Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous
gas. Carbon monoxide, if not avoided, will
result in death or serious injury.
DANGER

Safety Information
3 Owner’s Manual for 60 Hz Air-Cooled Generators
Electrical Hazards
Fire Hazards
Comply with regulations the local agency for
workplace health and safety has established.
Also, verify that the generator is installed in
accordance with the manufacturer’s instruc-
tions and recommendations. Following
proper installation, do nothing that might alter
a safe installation and render the unit in non-
compliance with the aforementioned codes,
standards, laws, and regulations.
Explosion Hazards
(000178a)
WARNING
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.
(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.
WARNING
(000281)
Fire risk. Fuel and vapors are extremely
flammable. Do not operate indoors. Doing
so could result in death, serious injury, or
property or equipment damage.
(000144)
DANGER
Electrocution. Contact with bare wires,
terminals, and connections while generator
is running will result in death or serious injury.
(000150)
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.
DANGER
(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.
WARNING
(000217)
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.
WARNING
(000218)
Fire and explosion. Installation must comply with all
local, state, and national electrical building codes.
Noncompliance could result in unsafe operation,
equipment damage, death, or serious injury.
WARNING
(000219)
Fire hazard. Use only fully-charged fire extinguishers
rated “ABC” by the NFPA. Discharged or improperly
rated fire extinguishers will not extinguish electrical
fires in automatic standby generators.
(000100a)
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
WARNING
Electrocution. Refer to local codes and standards for
safety equipment required when working with a live
electrical system. Failure to use required safety
equipment could result in death or serious injury.
(000257)
(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
Explosion and fire. Fuel and vapors are extremely
flammable and explosive. No leakage of fuel is
permitted. Keep fire and spark away. Failure to do
so will result in death or serious injury.
(000151a)
DANGER
Explosion and fire. Connection of fuel source must be
completed by a qualified professional technician or contractor.
Incorrect installation of this unit will result in death, serious
injury, and property and equipment damage.

Safety Information
Owner’s Manual for 60 Hz Air-Cooled Generators 4
Battery Hazards
Always recycle batteries in accordance with
local laws and regulations. Contact your local
solid waste collection site or recycling facility
to obtain information on local recycling pro-
cesses. For more information on battery
recycling, visit the Battery Council Interna-
tional website at: http://batterycouncil.org.
(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.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000162)
Explosion. Do not dispose of batteries in a fire.
Batteries are explosive. Electrolyte solution can cause
burns and blindness. If electrolyte contacts skin or eyes,
flush with water and seek immediate medical attention.
WARNING
(000137a)
WARNING
Explosion. Batteries emit explosive gases while
charging. Keep fire and spark away. Wear protective
gear when working with batteries. Failure to do so
could result in death or serious injury.
(000164)
WARNING
Electrical shock. Disconnect battery ground
terminal before working on battery or battery
wires. Failure to do so could result in death
or serious injury.
(000138a)
WARNING
Risk of burns. Batteries contain sulfuric acid and can
cause severe chemical burns. Wear protective gear
when working with batteries. Failure to do so could
result in death or serious injury.
(000163a)
Risk of burn. Do not open or mutilate batteries.
Batteries contain electrolyte solution which can cause
burns and blindness. If electrolyte contacts skin or
eyes, flush with water and seek immediate medical
attention.
WARNING
WARNING
(000228)
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.

General Information
5 Owner’s Manual for 60 Hz Air-Cooled Generators
Section 2: General Information
Generator Components and Control Locations
Figure 2-1. 10 kW—Components and Control Locations
A Lock with cover G Status LED indicators N Fuel regulator
B Main line circuit breaker
(generator disconnect)
H Airbox with air cleaner O Fuel inlet
C Control panel J Oil filter P Wi-Fi module
D Battery compartment
(battery not supplied)
K Oil drain hose Q Data decal location
E Exhaust enclosure L Composite base R Auxiliary shutdown switch
F Oil fill cap/dipstick M Sediment trap
001818
F
M
N
O
P
A
Q
D
C
BE
L
K
J
HA
G
R

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 6
Figure 2-2. 14 kW–18 kW—Components and Control Locations
A Lock with cover G Status LED indicators N Fuel regulator
B Main line circuit breaker
(generator disconnect)
H Oil drain hose O Fuel inlet
C Airbox with air cleaner J Oil fill cap/dipstick P Wi-Fi module
D Control panel K Oil filter Q Data decal location
E Battery compartment
(battery not supplied)
L Composite base R Auxiliary shutdown switch
F Exhaust enclosure M Sediment trap S Auxiliary shutdown switch
009340a
C
B
G
F
E
D
AA
L
K
J
H
P
O
N
M
S
R
Q

General Information
7 Owner’s Manual for 60 Hz Air-Cooled Generators
Figure 2-3. 20 kW–26 kW—Components and Control Locations
A Lock with cover H Oil drain hose P Fuel inlet
B Main line circuit breaker
(generator disconnect)
J Oil fill cap Q Wi-Fi module
C Airbox with air cleaner K Oil filter R Data decal location
D Control panel L Composite base S Auxiliary shutdown switch
E Battery compartment
(battery not supplied)
M Oil dipstick T Auxiliary shutdown switch
F Exhaust enclosure N Sediment trap
G Status LED indicators O Fuel regulator
001786
N
M
O
P
Q
G
K
J
F
L
R
E
A
D
C
B
A
H
T
S

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 8
Data Decals
Two decals on the generator provide information about the unit itself and required fuel inlet pres-
sure for correct operation.
Model Data Decal
Includes important information
about the unit including:
• model number
• serial number
• production date
• voltage
• frequency
• amps
• country of origin
• rated ambient
temperature
The model data decal also displays
certification symbols by Under-
writer’s Laboratory (UL) and the
Southwest Research Institute
(SwRI).
Fuel Inlet Pressure
Displays unit serial number, along
with minimum and maximum inlet
pressures for natural gas (NG) and
liquid propane (LP) supply. Space
is provided for installer to enter
maximum flow rates based on
installed pipe sizes and lengths.

General Information
9 Owner’s Manual for 60 Hz Air-Cooled Generators
Specifications
Generator
Engine
A detailed specification sheet for a particular generator is available from a local IASD.
Model 10 kW 14 kW 18 kW 20 kW 22 kW 24 kW 26 kW
Rated voltage 240
Rated maximum load cur-
rent (amps) at rated volt-
age with LP*
41.7 58.3 75.0 83.3 91.7 100.0 108.3
Main line circuit breaker
(generator disconnect) 45 amp 60 amp 80 amp 90 amp 100 amp 110 amp
Phase 1
Rated AC frequency 60 Hz
Battery requirement
(field supplied) 0H3421S
Enclosure Aluminum
Weight (lb / kg)
(without battery) 338 / 153 385 / 175 420 / 191 436 / 198 445 / 202 455 / 206 518 / 235
Normal operating range This unit is tested in accordance to UL 2200 standards with an operating
temperature of -20 °F (-29 °C) to 122 °F (50 °C). For areas where tempera-
tures fall below 32 °F (0 °C), a cold weather kit is recommended. When oper-
ated above 77 °F (25 °C), there may be a decrease in engine power. See
Engine.
These generators are rated in accordance with UL 2200, Safety Standard for Stationary Engine Genera-
tor Assemblies, and CSA-C22.2 No. 100-04 Standard for Motors and Generators.
* NG ratings will depend on specific fuel joules/BTU content. Typical derates are between 10-20% off the
LP gas rating.
Model 10 kW 14/18 kW 20–26 kW
Engine type G-Force™ 400 Series G-Force™ 800 Series G-Force™ 1000 Series
Number of cylinders 1 2 2
Displacement 460 cc 816 cc 999 cc
Cylinder block Aluminum with cast iron sleeve
Recommended spark plug 0G0767B 0G0767A
Spark plug gap 0.020 in (0.508 mm) 0.040 in (1.02 mm)
Hydraulic lifters No Yes No
Valve clearance 0.002–0.004 in
(0.05–0.1 mm) N/A 0.002–0.004 in (0.05–0.1 mm)
Starter 12 VDC
Oil capacity including filter Approx. 1.1 qt (1.03 L) Approx. 2.2 qt (2.1 L) Approx. 1.9 qt (1.8 L)
Recommended oil filter 070185ES
Recommended air filter 0E9371AS 0J8478S
Engine power is subject to and limited by such factors as fuel BTU/joules, ambient temperature, and alti-
tude. Engine power decreases approximately 3.5% for each 1,000 ft (304.8 m) above sea level, and also
will decrease approximately 1% for each 10 °F (6 °C) above 60 °F (15 °C) ambient temperature.

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 10
Protection Systems
The generator may need to run for long peri-
ods of time with no operator present to moni-
tor engine or generator conditions. The
generator is equipped with protection sys-
tems to automatically shut down the unit to
protect against potentially damaging condi-
tions. Some of these systems include:
Alarms:
Warnings:
The control panel contains a display alerting
the operator when a fault condition occurs.
The above list is not all-inclusive. See Opera-
tion for more information about alarms and
control panel operation.
NOTE: A warning indicates a condition on the
generator which should be addressed, but will
not shut down generator. An alarm shuts
down the generator to protect system from
any damage. In event of an alarm, an owner
can clear the alarm and restart generator prior
to contacting an IASD. Contact an IASD if the
intermittent issue occurs again.
Emissions
The United States Environmental Protection
Agency (US EPA) (and California Air
Resources Board (CARB), for engines/equip-
ment certified to California standards)
requires this engine/equipment to comply
with exhaust and evaporative emissions
standards. Locate the emissions compliance
decal on the engine to determine applicable
standards. See the included emissions war-
ranty for emissions warranty information. Fol-
low the maintenance specifications in this
manual to ensure the engine complies with
applicable emissions standards for the dura-
tion 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 fol-
lowing:
:
NOTE: Under U.S. EPA regulations, a mixer
adjustment kit may be required when
operating over 2,000 ft (609.6 m) above sea
level. Contact an IASD for high altitude*
adjustment information.
*High altitude is any elevation over
2,000 ft (609.6 m).
Fuel Requirements
The engine has been fitted with a dual fuel
carburetion system. The unit will run on NG
or LP gas (vapor), but has been factory-con-
figured to run on NG. The fuel system will be
configured for the available fuel source
during installation.
Recommended fuels should have a BTU con-
tent of at least 1,000 BTUs per ft3 (37.26
megajoules per m3) for natural gas, or at
least 2,500 BTUs per ft3 (93.15 megajoules
per m3) for LP gas.
NOTE: If converting to LP gas from NG, a
minimum LP tank size of 250 gal (946 L) is
recommended. See installation manual for
complete procedures and details.
Battery Requirements
12 volts, Group 26R Wet Cell 540CCA (Part
number 0H3421S) minimum or Group 35
AGM 650CCA minimum.
•High Temperature
•Low Oil Pressure
•Overcrank
•Overspeed
•Overvoltage
•Undervoltage
•Overload
•Underspeed
•RPM Sensor
Loss
•Controller Fault
•Wiring Error
•Stepper
Overcurrent
• Charger Warning
• Charger Missing
AC
• Low Battery
• Battery Problem
•Exercise Set
Error
•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)
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.
DANGER

General Information
11 Owner’s Manual for 60 Hz Air-Cooled Generators
Battery Charger
The battery charger is integrated into the
control panel module in all models. It oper-
ates as a smart charger, verifying output
charging levels are safe and continuously
optimized to promote maximum battery life. A
kit is provided to install a fuse in transfer
switch for T1 battery charger connection. Fol-
low installation instructions provided with kit.
NOTE: Do not use external battery chargers.
Engine Oil Requirements
See Engine Oil Requirements for correct oil
viscosity.
Activating the Generator
Generator should be activated upon initial
startup. See installation manual for complete
instructions.
Wi-Fi Module
Generator is equipped with a Wi-Fi module.
See Wi-Fi module owner’s manual for further
information.
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 10 kW 14 kW 18 kW 20 kW 22 kW 24 kW 26 kW
26R Exide battery 0H3421S
Spark plug 0G0767B 0G0767A
Oil filter 070185ES
Air filter 0E9371A 0J8478
Control panel fuse 0D7178T
Transfer switch
fuses
See transfer switch manual for part number
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 items necessary to perform complete routine mainte-
nance on the generator along with oil recommendations (oil not
included).
Fascia Base Wrap The fascia base wrap snaps together around the bottom of the new
air-cooled generators. This offers a sleek, contoured appearance as
well as protection from rodents and insects by covering the lifting
holes located in the base. Requires use of the mounting pad shipped
with the generator.

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 12
Mobile Link® Cellular
Accessories
The Mobile Link family of Cellular Accessories allow users to monitor
generator status from anywhere in the world, using a smartphone,
tablet, or PC. Easily access information such as the current operating
status and maintenance alerts. Users can connect an account with an
authorized service dealer for fast, friendly, and proactive service. With
Mobile Link, users are taken care of before the next power outage.
Touch-Up Paint Kit If the generator enclosure is scratched or damaged, it is important to
touch-up the paint to protect from future corrosion. The touch-up paint
kit includes the necessary paint to correctly maintain or touch-up a
generator enclosure.
Extended Warranty
Coverage
Extend generator warranty coverage by purchasing extended war-
ranty coverage. Covers both parts and labor. Extended coverage can
be purchased within 12 months of the end-user’s purchase date. This
extended coverage is applicable to registered units and end-user
proof of purchase must be available upon request.
Available for Generac® and Guardian® products.
Not available for Corepower™, PowerPact®, and EcoGen™ products
or all international purchases.
LTE LP Fuel Level
Monitor
The LTE enabled LP fuel level monitor provides constant monitoring
of a connected LP fuel tank. Monitoring the LP tank’s fuel level is an
important step in verifying the generator is ready to run during an
unexpected power failure. Status alerts are available through a free
application to notify users when the LP tank needs a refill.
Base Plug Kit Base plugs snap into the lifting holes on the base of air-cooled home
standby generators. This offers a sleek, contoured appearance, as
well as offers protection from rodents and insects by covering the lift-
ing holes located in the base. Base plug kit contains four base plugs,
sufficient for use on a single air-cooled home standby generator.
Smart Management
Module
(50 and 100 amps)
Smart Management Modules (SMM’s) are used to optimize the per-
formance of a standby generator. They manage large electrical loads
upon startup and shed them to aid in recovery when overloaded. In
many cases, using SMM’s can reduce the overall size and cost of the
system.
High Altitude Kit A high altitude kit may be required when operating over 2,000 ft (610
m) above sea level per U.S. EPA regulations. Operating the engine
with the incorrect engine configuration at a given altitude may
increase emissions and decrease fuel efficiency and performance.
Accessory Description

Operation
13 Owner’s Manual for 60 Hz Air-Cooled Generators
Section 3: Operation
Site Prep Verification
Generator must be installed to allow unim-
peded airflow into and out of generator.
Mechanical and gravity outdoor air intake
openings for air distribution and supply sys-
tems must be located not less than 10 ft
(3.05 m) horizontally from generator enclo-
sure. See Section 401.4 in the ICC Mechani-
cal Code for additional information.
Verify all shrubs or tall grasses within 3 ft
(0.91 m) of intake and discharge louvers on
the sides of the enclosure have been
removed. Install generator on high ground
where water levels will not rise and endanger
it. This unit must not operate in or be sub-
jected to standing water. Verify all potential
water sources such as water sprinklers, roof
run-off, rain gutter downspouts, and sump
pump discharges are directed away from
unit.
Generator Enclosure
Enclosure lid is locked prior to shipment. A
set of keys is attached to cardboard on top of
generator. An additional set of keys is
attached to pallet bracket on the front intake
end of generator.
NOTE: Keys provided with this unit are
intended for service personnel use only.
Opening the Lid
1. Use keys to open generator lid.
2. See Figure 3-1. Two locks (A) secure lid;
one on each side. Open protective rubber
cap to access keyhole.
Figure 3-1. Opening the Lid
3. Press down on lid above side lock, and
unlock latch to correctly open lid.
4. Repeat for other side. Lid may appear
stuck if pressure is not applied from the
top.
NOTE: Always verify side locks are unlocked
before attempting to lift lid.
Front Access Panel Removal
See Figure 3-2. Remove front access panel
(A) by lifting straight up and out once lid is
open.
Figure 3-2. Remove Front Access Panel
NOTE: Always lift front access panel straight
up before pulling away from enclosure (B and
C). Do not pull panel away from the enclosure
before lifting up (D).
(000191)
DANGER
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
009209
A
A
009210
A
B
C
D

Operation
Owner’s Manual for 60 Hz Air-Cooled Generators 14
Intake Side Panel Removal
See Figure 3-3. Intake side panel (A) must be
removed to access battery compartment, fuel
regulator, and sediment trap.
1. Raise lid and remove front panel.
2. Use a hex key to remove two mounting
screws (B) and L-bracket screw (C).
3. Lift intake panel up and away from genera-
tor.
NOTE: Always lift intake side panel straight up
before pulling away from enclosure. Do not
pull panel away from enclosure before lifting
up (D).
Figure 3-3. Intake Side Panel Removal
Main Line Circuit Breaker
(Generator Disconnect)
See Figure 3-4. This is a 2-pole main line cir-
cuit breaker (MLCB) (generator disconnect)
(A) rated according to relevant specifications.
The generator MLCB (generator disconnect)
can be locked in OFF (OPEN) for security.
Use an appropriately-sized padlock (not
included) with a shackle long enough to pass
through both lock tabs (B).
Figure 3-4. Main Line Circuit Breaker
(MLCB)
NOTE: DO NOT leave generator MLCB
(generator disconnect) locked in OFF (OPEN)
during normal generator operation. Leaving
generator MLCB (generator disconnect) in
OFF (OPEN) will prevent generator from
powering structure during a power outage
when placed in AUTO mode.
LED Indicator Lights
See Figure 3-5. Three LEDs are visible
behind a translucent lens on the generator
side panel. These LEDs indicate generator
operating status.
Figure 3-5. LED Indicator Lights
•Green LED “Ready” light (A) illuminates
when utility is present and control panel is in
AUTO. LED flashes when automatic transfer
switch converts to generator power during a
utility power outage.
•Red LED “Alarm” light (B) illuminates when
generator is OFF or a fault is detected. Con-
tact an IASD.
•Yellow LED “Non-Critical Alert” light (C) illu-
minates when maintenance is required.
NOTE: Yellow LED may be illuminated at the
same time as either the red or green LED.
002961
B
A
C
D
001810
A
B
B
001791
BCA

Operation
15 Owner’s Manual for 60 Hz Air-Cooled Generators
Auxiliary Shutdown Switch
All generators are equipped with an external
means of shutting down the generator which
complies with the latest NEC code require-
ment. Primary generator shutdown sequence
is described in Shutting Generator Down
While Under Load or During a Utility Outage.
See Figure 3-6. An auxiliary shutdown switch
(A) is located on the exterior of the generator
back panel. This auxiliary shutdown switch
shuts down generator and disables restarts.
Figure 3-6. External Auxiliary Shutdown
Switch (all models)
NOTE: Whenever possible, perform primary
shutdown procedure before disabling
generator with auxiliary shutdown switch.
See Figure 3-7. 14–26 kW generators also
have an auxiliary shutdown switch (A)
located inside generator.
Figure 3-7. Internal Auxiliary Shutdown
Switch (14–26kW)
NOTE: Generator will not start if either switch
is OPEN (O). Controller displays an “Auxiliary
Shutdown” alarm, and red LED “Alarm” light
illuminates. To clear this condition, set switch
or switches to CLOSED (I). Clear alarm by
pressing OFF button, and then ENTER. The
generator can then be placed in AUTO or
MANUAL.
Control Panel Interface
See Figure 3-8. The control panel interface
(A) is located under the enclosure lid. Verify
both left and right side locks are unlocked
before attempting to lift lid of enclosure.
Open lid as directed in Opening the Lid.
Figure 3-8. Generator Control Panel
The 7.5A fuse is located beneath rubber
cover (B) to the right of the control panel.
Verify both left and right side locks are
securely out of the way before closing unit.
All appropriate panels must be in place
during any operation of the generator. This
includes operation by a servicing technician
while conducting troubleshooting pro-
cedures.
Using the AUTO/OFF/MANUAL
Buttons
NOTE: Damage caused by mis-wiring of
interconnect wires is not warrantable.
Equipment Damage. The auxiliary shutdown switch
is not to be used to power down the unit under
normal operating circumstances. Doing so will
result in equipment damage. (000399)
CAUTION
005492
A
005491
A
Button Description of Operation
AUTO Activates fully automatic system
operation. Allows unit to automati-
cally start and exercise generator
according to exercise timer (see
Setting the Exercise Timer).
Green LED flashes when auto-
matic transfer switch converts to
generator power during a utility
power outage.
OFF Shuts down engine and prevents
automatic operation of unit.
MANUAL Cranks and starts generator.
Transfer to stand-by power will not
occur unless there is a utility fail-
ure.
Blue LED flashes when automatic
transfer switch converts to gener-
ator power during a utility power
outage.
001798
B
A

Operation
Owner’s Manual for 60 Hz Air-Cooled Generators 16
Operating Modes Interface Menu Displays
LCD PanelMode Description
MANUAL •Will not transfer to standby if
utility is present.
•Transfers to standby if utility
drops below 65% of nominal
for five consecutive seconds
(dealer programmable) after
warm-up.
•Transfers back when utility
returns for 15 consecutive
seconds (dealer program-
mable). Engine continues to
run until removed from
MANUAL.
AUTO •Starts and runs if utility
drops for five consecutive
seconds (dealer program-
mable).
•Starts an engine warm-up
timer (duration varies when
Cold Smart Start is
enabled).
–Will not transfer if utility
subsequently returns.
–Transfers to standby if util-
ity is not present.
•Transfers to utility once util-
ity returns (above 80% of
nominal) for 15 consecutive
seconds (dealer program-
mable).
•Will not transfer to utility
unless utility returns. Unit
will shut down if OFF button
is pressed or a shutdown
alarm is present.
•Unit will shut down after one
minute cool-down time
when utility power returns.
EXERCISE •Will not exercise if unit is
already running in either
AUTO or MANUAL.
•During exercise, controller
will only transfer if utility
drops during exercise for
five seconds (dealer pro-
grammable), and will switch
to AUTO.
Feature Description
HOME
page
Default page displayed if no but-
tons are pressed for 60 sec-
onds. Normally shows current
status message, and current
date and time. Highest priority
active alarm/warning is auto-
matically posted on this page,
as well as flashing the backlight
when such a condition is
detected. In the case of multiple
alarms/warnings, only first mes-
sage is displayed. Press OFF
button and then ENTER button
to clear an alarm or warning.
When “Hours of Protection” is
displayed, this represents total
time generator has been moni-
toring utility supply and ready to
provide backup power if
needed.
Display
Backlight
Normally off. The backlight will
automatically illuminate and
remain on for 30 seconds if
operator presses any button.
MAIN
MENU
page
Allows operator to navigate to
all other pages or sub-menus by
using arrow keys and ENTER
button. Page can be accessed
at any time with several presses
of the dedicated ESCAPE but-
ton. Each press of the ESCAPE
button takes operator to previ-
ous menu until MAIN MENU dis-
plays. This page contains
information for History; Status;
Edit; and Debug.

Operation
17 Owner’s Manual for 60 Hz Air-Cooled Generators
Menu System Navigation
Press ESCAPE button from any page to access the MENU. If needed, press ESCAPE button
several times to reach the MENU page. Navigate to the desired menu by using the ↑/↓ buttons.
Press ENTER button when desired menu is displayed and flashing,
Figure 3-9. Navigation Menu
EVOLUTION 2.0 / SYNC 3.0 HSB MENU MAP
Switched to “OFF”
Hours of Protection
0 (H)
Note: Menu functions and features may vary depending on unit model and firmware revision.
* Hours of Protection and number of hours will flash every 5 seconds when displayed.
*
Ready to Run
Hours of Protection
0 (H)
Utility Loss Delay
Pausing for 13 sec.
Cranking
Attempt # 3
Running in Exercise
Hours of Protection
0 (H)
Running
Cooling Down
Running - Warning
“Warning Message”
Warning Message(s)
Low Battery
Exercise Set Error
Service Schedule A Service Schedule B
Inspect Battery
Stopping...
FIRMWARE ERROR-9
Fuel Pressure
Battery Problem
Charger Warning
Charger Missing AC
Overload Warning
SEEPROM ABUSE
USB Warning
Download Failure
Overload Warning
No WIFI Module
No WIFI Router Comms
No WIFI Server Comms
Cranking - Warning
“Warning Message”
Alarm Message(s)
High Engine Temp
Low Oil Pressure
Overcrank
Overspeed
RPM Sense Loss
Underspeed
Controller Fault
FIRMWARE ERROR-7
WIRING ERROR
Overvoltage
Undervoltage
Overload Remove Load
Low Volts Remove Load
Stepper Overcurrent
Auxiliary Shutdown
Emergency Stop
Fuse Problem
Loss of Speed Signal
Loss of Serial Link
Stopped - Warning
“Warning Message”
Cranking
Pausing for 13 sec
Running
Hours of Protection
0 (H)
Running
Warming Up
Running - Alarm
“Alarm Message”
Cranking - Alarm
“Alarm Message”
Switched OFF
Hours of Protection
0 (H)
UP ARROW = + DOWN ARROW = -
006667a