Generac
®
Power Systems, Inc.
INTRODUCTION
Thank you for purchasing this model of the Guardian
product line by Generac Power Systems Inc. This
model is a compact, high performance, air-cooled,
engine-driven generator designed to automatically
supply electrical power to operate critical loads dur-
ing a utility power failure.
This unit is factory installed in an all-weather, metal enclo-
sure that is intended exclusively for outdoor installation.
This generator will operate using either vapor withdrawn
liquid propane (LP) or natural gas (NG).
READ THIS MANUAL THOROUGHLY
If any portion of this manual is not understood, contact
Generac or the nearest Generac/Guardian Authorized
Dealer for starting, operating and servicing procedures.
Throughout this publication, and on tags and
decals affixed to the generator, DANGER, WARNING,
CAUTION and NOTE blocks are used to alert per-
sonnel to special instructions about a particular
operation that may be hazardous if performed incor-
rectly or carelessly. Observe them carefully. Their def-
initions are as follows:
After this heading, read instructions that, if not
strictly complied with, will result in serious person-
al injury, including death, in addition to property
damage.
After this heading, read instructions that, if not
strictly complied with, may result in serious person-
al injury or property damage.
After this heading, read instructions that, if not
strictly complied with, could result in damage to
equipment and/or property.
NOTE:
After this heading, read explanatory statements
that require special emphasis.
These safety warnings cannot eliminate the hazards
that they indicate. Common sense and strict compli-
ance with the special instructions while performing the
service are essential to preventing accidents.
Four commonly used safety symbols accompany the
DANGER, WARNING and CAUTION blocks. The type
of information each indicates follows:
This symbol points out important safety informa-
tion that, if not followed, could endanger personal
safety and/or property of others.
This symbol points out potential explosion hazard.
This symbol points out potential fire hazard.
This symbol points out potential electrical shock
hazard.
The operator is responsible for proper and safe use
of the equipment. Generac strongly recommends that
the operator read this
Owner's Manual
and thor-
oughly understand all instructions before using this
equipment. Generac 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.
CONTENTS
This manual contains pertinent owner’s information,
including warranty, electrical diagrams, exploded
views and lists of repair parts, for three different
Guardian models:
• 04389-2 – 6 kW NG, 7 kW LP, single-cylinder GH-
410 Engine
• 04456-2 – 12 kW NG, 12 kW LP, V-twin GT-990
Engine
• 04390-2 – 13 kW NG, 15 kW LP, V-twin GT-990
Engine
OPERATION AND MAINTENANCE
It is the operator's responsibility to perform all safe-
ty checks, to make sure that all maintenance for safe
operation is performed promptly, and to have the
equipment checked periodically by a Generac/
Guardian Authorized Dealer. Normal maintenance
service and replacement of parts are the responsibil-
ity of the owner/operator and, as such, are not con-
sidered defects in materials or workmanship within
the terms of the warranty. Individual operating habits
and usage contribute to the need for maintenance
service.
Proper maintenance and care of the generator
ensures a minimum number of problems and keep
operating expenses at a minimum. See a Generac/
Guardian Authorized Dealer for service aids and
accessories.
HOW TO OBTAIN SERVICE
When the generator requires servicing or repairs,
simply contact a Generac/Guardian Authorized
Dealer for assistance. Service technicians are factory-
trained and are capable of handling all service needs.
When contacting a Generac/Guardian Authorized
Dealer or the factory about parts and service, always
supply the complete model number and serial number
of the unit as given on its data decal, which is located
on the generator. See Figure 1.1 or Figure 1.2 in
Section 1.6 for decal location.
Model No. ____________ Serial No. ______________
!
DANGER
AUTHORIZED
DEALER LOCATION
To locate the nearest GENERAC/GUARDIAN
AUTHORIZED DEALER, please call this number:
1-800-333-1322
DEALER LOCATION INFORMATION
CAN BE OBTAINED AT THIS NUMBER.