Generac Power Systems 45kW User manual

This manual should remain with the unit.
2.4L
45kW Models
EPA Certified
Owner's Manual
Stationary Emergency Generator
Cover193 Rev. A 04/10 Part No. 0H7318
nNOT INTENDED FOR USE IN CRITICAL LIFE SUPPORT APPLICATIONS.
ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS
SHOULD ATTEMPT INSTALLATION! DEADLY EXHAUST
FUMES! OUTDOOR INSTALLATION ONLY!

SECTION PAGE
INTRODUCTION ........................................................... 1-1
Read this Manual Thoroughly.......................................................1-1
Operation and Maintenance..........................................................1-1
How to Obtain Service .................................................................1-1
SAFETY RULES ............................................................ 1-2
GENERAL INFORMATION............................................ 2-1
Identification Record ........................................................................2-1
Data Label ...................................................................................2-1
EQUIPMENT DESCRIPTION ........................................ 3-1
Equipment Description .....................................................................3-1
Engine Oil Recommendations...........................................................3-1
Coolant Recommendations ..............................................................3-1
ENGINE PROTECTIVE DEVICES ................................. 4-1
Engine Protective Devices ................................................................4-1
High Coolant Temperature Sender ................................................4-1
Low Coolant Level Sensor............................................................4-1
Low Oil Pressure Switch ..............................................................4-1
Overcrank Shutdown....................................................................4-1
Overspeed Shutdown ...................................................................4-1
RPM Sensor Loss Shutdown........................................................4-1
DC Fuses.....................................................................................4-1
FUEL SYSTEM .............................................................. 5-1
Fuel Requirements .......................................................................5-1
Natural Gas Fuel System ..............................................................5-1
Propane Vapor Withdrawal Fuel System........................................5-1
LP Liquid Fuel System..................................................................5-1
SPECIFICATIONS ......................................................... 6-1
Stationary Emergency Generator ..................................................6-1
Engine .........................................................................................6-1
Cooling System............................................................................6-1
Fuel System.................................................................................6-1
Electrical System .........................................................................6-1
Weather and Maintenance Kits .....................................................6-2
Reconfiguring the Fuel System .........................................................6-2
Fuel System.................................................................................6-2
Control Panel ...............................................................................6-2
GENERAL INFORMATION............................................ 7-1
Alternator AC Lead Connections.......................................................7-1
Four-lead, Single-phase Stator......................................................7-1
Alternator Power Winding Connections.............................................7-1
3-phase Alternators ("Y" Configuration) ........................................7-1
3-phase Alternators ("Delta" Configuration)...................................7-2
CONTROL PANEL......................................................... 8-1
Control Panel Interface.....................................................................8-1
Using the Auto/Off/Manual Switch................................................8-1
Activate the Generator......................................................................8-1
Display Interface Menus...................................................................8-1
Activation Chart ...........................................................................8-2
Setting the Exercise Timer................................................................8-3
Low Speed Exercise.....................................................................8-3
User Adjustable Settings ..................................................................8-3
Fuel Conversion ...............................................................................8-3
Operation.........................................................................................8-3
Automatic Transfer Operation .......................................................8-3
Sequence of Automatic Operation ................................................8-4
Crank Cycles and Overcrank Shutdown........................................8-4
Auto Start ........................................................................................ 8-4
Manual Start ....................................................................................8-4
Alarm and Warning Messages..........................................................8-4
Low Oil Pressure Shutdown Alarm ...............................................8-4
High Coolant Temperature Shutdown Alarm..................................8-4
Overcrank Shutdown Alarm..........................................................8-4
Overspeed Shutdown Alarm .........................................................8-4
RPM Sensor Failure Shutdown Alarm...........................................8-4
Under-frequency Shutdown Alarm................................................8-5
Low Battery Alarm .......................................................................8-5
Low Battery Warning....................................................................8-5
Low Coolant Level Alarm .............................................................8-5
Missing Cam Pulse Alarm ............................................................8-5
Missing Crank Pulse Alarm ..........................................................8-5
Low Fuel Pressure Warning..........................................................8-5
Governor Sensor Fault Alarm........................................................8-5
Wiring Error Alarm .......................................................................8-5
Undervoltage Alarm .....................................................................8-5
Overvoltage Alarm .......................................................................8-6
Internal Failure Shutdown Alarm ...................................................8-6
Canbus Alarm..............................................................................8-6
Ignition Alarm ..............................................................................8-6
Maintenance Warning...................................................................8-6
Alarm Cancel ...............................................................................8-6
Common Alarm Relay......................................................................8-6
Maintenance Alerts ..........................................................................8-6
Menu System...................................................................................8-7
OPERATION.................................................................. 9-1
Stationary Emergency Generator Control and Operation....................9-1
Operating Unit with Manual Transfer Switch......................................9-1
Engine Start-up and Transfer........................................................9-1
Retransfer and Shutdown.............................................................9-1
Operating Unit with Automatic Transfer Switch .................................9-1
MAINTENANCE........................................................... 10-1
General Maintenance......................................................................10-1
Check Engine Oil........................................................................10-1
Changing Engine Oil...................................................................10-1
Cooling Intake/Outlet ..................................................................10-1
Inspect Cooling System .............................................................10-1
Engine Coolant...........................................................................10-2
Coolant Change .........................................................................10-2
Overload Protection for Engine DC Electrical System ..................10-2
Exercise System ........................................................................10-2
Perform Visual Inspection ..........................................................10-2
Inspect Exhaust System.............................................................10-2
Check Fan Belt...........................................................................10-2
Inspect Engine Governor ............................................................10-2
Changing the Engine Air Filter.....................................................10-2
Spark Plugs ...............................................................................10-3
Battery Maintenance ..................................................................10-3
Battery Replacement..................................................................10-3
Battery Fluid...............................................................................10-3
Cleaning the Stationary Emergency Generator ............................10-3
SERVICE SCHEDULE ................................................. 11-1
TROUBLESHOOTING ................................................. 12-1
Troubleshooting Guide....................................................................12-1
EMISSIONS WARRANTY............................................ 13-1
NOTES
EXPLODED VIEWS & PARTS LISTS
WIRING DIAGRAMS & SCHEMATICS
Content048 Rev. A 05/10
Table of Contents

INTRODUCTION
Thank you for purchasing this model of the stationary emergency
generator product line.
Every effort was expended to make sure that the information and
instructions in this manual were both accurate and current at the
time the manual was written. However, the manufacturer reserves
the right to change, alter or otherwise improve this product(s) at
any time without prior notice.
READ THIS MANUAL THOROUGHLY
If any portion of this manual is not understood, contact the nearest
Service 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 personnel to special instructions about a particular
service or operation that may be hazardous if performed incor-
rectly or carelessly. Observe them carefully. Their definitions are
as follows:
INDICATES A HAZARDOUS SITUATION OR ACTION WHICH, IF
NOT AVOIDED, WILL RESULT IN DEATH OR SERIOUS INJURY.
Indicates a hazardous situation or action which, if not
avoided, could result in death or serious injury.
Indicates a hazardous situation or action which, if not
avoided, could result in minor or moderate injury.
NOTE:
Notes contain additional information important to a procedure
and will be found within the regular text body of this manual.
These safety warnings cannot eliminate the hazards that they
indicate. Common sense and strict compliance with the special
instructions while performing the service are essential to prevent-
ing accidents.
Four commonly used safety symbols accompany the DANGER,
WARNING and CAUTION blocks. The type of information each
indicates is as follows:
nThis symbol points out important safety information 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 equip-
ment. The manufacturer strongly recommends that the operator
read this Owner's Manual and thoroughly understand all instruc-
tions 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.
For safety reasons, the manufacturer recommends that this
equipment be installed, serviced and repaired by a Service
Dealer or other competent, qualified electrician or installation
technician who is familiar with applicable codes, standards and
regulations. The operator also must comply with all such codes,
standards and regulations.
OPERATION AND MAINTENANCE
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 a
Service Dealer. Normal maintenance service and replacement of
parts are the responsibility of the owner/operator and, as such,
are not considered defects in materials or workmanship within the
terms of the warranty. Individual operating habits and usage con-
tribute to the need for maintenance service.
Proper maintenance and care of the generator ensure a minimum
number of problems and keep operating expenses at a minimum.
See a Service Dealer for service aids and accessories.
Operating instructions presented in this manual assume that the
generator electric system has been installed by a Service Dealer or
other competent, qualified contractor. Installation of this equipment
is not a “do-it-yourself” project.
HOW TO OBTAIN SERVICE
When the generator requires servicing or repairs, simply contact
a Service Dealer for assistance. Service technicians are factory-
trained and are capable of handling all service needs.
When contacting a dealer about parts and service, always supply
the complete Model Number, Serial Number and Type Code (where
applicable) from the DATA LABEL that is affixed to the unit.
1-1
Safety004 Rev. F 05/10
Safety Instructions
n
SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation be copied and posted in potential
hazard areas. Safety should be stressed to all operators, potential operators, and service and repair technicians for this
equipment.

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, effi-
ciently 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 warnings in this manual, and on
tags and decals affixed to the unit are, therefore, not all inclusive.
If a procedure, work method or operating technique is used that
the manufacturer does not specifically recommend, ensure that it
is safe for others. Also make sure the procedure, work method or
operating technique utilized does not render the generator unsafe.
n
Despite the safe design of this generator,
operating this equipment imprudently, neglect-
ing its maintenance or being careless can cause
possible injury or death. Permit only respon-
sible and capable persons to install, operate or
maintain this equipment.

Potentially lethal voltages are generated by
these machines. Ensure all steps are taken to
render the machine safe before attempting to
work on the generator.
n
Parts of the generator are rotating and/or hot
during operation. Exercise care near running
generators.
GENERAL HAZARDS
For safety reasons, the manufacturer recommends that this•
equipment be installed, serviced and repaired by a Service
Dealer or other competent, qualified electrician or installation
technician who is familiar with applicable codes, standards
and regulations. The operator also must comply with all such
codes, standards and regulations.
Installation, operation, servicing and repair of this (and related)•
equipment must always comply with applicable codes, stan-
dards, laws and regulations. Adhere strictly to local, state and
national electrical and building codes. Comply with regulations
the Occupational Safety and Health Administration (OSHA) has
established. Also, ensure that the generator is installed, operat-
ed and serviced in accordance with the manufacturer’s instruc-
tions and recommendations. Following installation, do nothing
that might render the unit unsafe or in noncompliance with the
aforementioned codes, standards, laws and regulations.
The engine exhaust fumes contain carbon monoxide gas, which•
can be DEADLY. This dangerous gas, if breathed in sufficient
concentrations, can cause unconsciousness or even death. For
that reason, adequate ventilation must be provided. This should
be considered prior to installing the generator. The unit should
be positioned to direct exhaust gasses safely away from any
building where people, animals, etc., will not be harmed. Any
exhaust stacks that ship loose with the unit must be installed
properly per the manufacturer's instruction, and in strict compli-
ance with applicable codes and standards.
Keep hands, feet, clothing, etc., away from drive belts, fans,•
and other moving or hot parts. Never remove any drive belt or
fan guard while the unit is operating.
Adequate, unobstructed flow of cooling and ventilating air is•
critical in any room or building housing the generator to prevent
buildup of explosive gases and to ensure correct generator
operation. Do not alter the installation or permit even partial
blockage of ventilation provisions, as this can seriously affect
safe operation of the generator.
Keep the area around the generator clean and uncluttered.•
Remove any materials that could become hazardous.
When working on this equipment, remain alert at all times.•
Never work on the equipment when physically or mentally
fatigued.
Inspect the generator regularly, and promptly repair or replace•
all worn, damaged or defective parts using only factory-
approved parts.
Before performing any maintenance on the generator, discon-•
nect its battery cables to prevent accidental start-up. Disconnect
the cable from the battery post indicated by a NEGATIVE, NEG
or (–) first. Reconnect that cable last.
Never use the generator or any of its parts as a step. Stepping•
on the unit can stress and break parts, and may result in dan-
gerous operating conditions from leaking exhaust gases, fuel
leakage, oil leakage, etc.
ELECTRICAL HAZARDS
All stationary emergency generators covered by this manual•
produce dangerous electrical voltages and can cause fatal
electrical shock. Utility power delivers extremely high and dan-
gerous voltages to the transfer switch as well as the generator.
Avoid contact with bare wires, terminals, connections, etc.,
on the generator as well as the transfer switch, if applicable.
Ensure all appropriate covers, guards and barriers are in place
before operating the generator. If work must be done around
an operating unit, stand on an insulated, dry surface to reduce
shock hazard.
Do not handle any kind of electrical device while stand-•
ing in water, while barefoot, or while hands or feet are wet.
DANGEROUS ELECTRICAL SHOCK MAY RESULT.
1-2
Safety004 Rev. F 05/10
Safety Instructions

If personnel must stand on metal or concrete while installing,•
operating, servicing, adjusting or repairing this equipment,
place insulative mats over a dry wooden platform. Work on the
equipment only while standing on such insulative mats.
The National Electrical Code (NEC) requires the frame and•
external electrically conductive parts of the generator to be con-
nected to an approved earth ground. This grounding will help
prevent dangerous electrical shock that might be caused by a
ground fault condition in the generator or by static electricity.
Never disconnect the ground wire.
Wire gauge sizes of electrical wiring, cables and cord sets must•
be adequate to handle the maximum electrical current (ampac-
ity) to which they will be subjected.
Before installing or servicing this (and related) equipment, make•
sure that all power voltage supplies are positively turned off at
their source. Failure to do so will result in hazardous and pos-
sibly fatal electrical shock.
Connecting this unit to an electrical system normally supplied•
by an electric utility shall be by means of a transfer switch so as
to isolate the generator electric system from the electric utility
distribution system when the generator is operating. Failure to
isolate the two electric system power sources from each other
by such means will result in damage to the generator and may
also result in injury or death to utility power workers due to
backfeed of electrical energy.
Stationary emergency generators installed with an automatic•
transfer switch will crank and start automatically when normal
(utility) source voltage is removed or is below an acceptable
preset level. To prevent such automatic start-up and possible
injury to personnel, disable the generator’s automatic start cir-
cuit (battery cables, etc.) before working on or around the unit.
Then, place a “Do Not Operate” tag on the generator control
panel and on the transfer switch.
In case of accident caused by electric shock, immediately•
shut down the source of electrical power. If this is not pos-
sible, attempt to free the victim from the live conductor. AVOID
DIRECT CONTACT WITH THE VICTIM. Use a nonconducting
implement, such as a dry rope or board, to free the victim from
the live conductor. If the victim is unconscious, apply first aid
and get immediate medical help.
Never wear jewelry when working on this equipment. Jewelry•
can conduct electricity resulting in electric shock, or may get
caught in moving components causing injury.
FIRE HAZARDS
Keep a fire extinguisher near the generator at all times. Do NOT•
use any carbon tetra-chloride type extinguisher. Its fumes are
toxic, and the liquid can deteriorate wiring insulation. Keep the
extinguisher properly charged and be familiar with its use. If
there are any questions pertaining to fire extinguishers, consult
the local fire department.
EXPLOSION HAZARDS
Properly ventilate any room or building housing the generator to•
prevent build-up of explosive gas.
Do not smoke around the generator. Wipe up any fuel or oil•
spills immediately. Ensure that no combustible materials are left
in the generator compartment, or on or near the generator, as
FIRE or EXPLOSION may result. Keep the area surrounding the
generator clean and free from debris.
These generators may operate using one of several types•
of fuels. All fuel types are potentially FLAMMABLE and/or
EXPLOSIVE and should be handled with care. Comply with all
laws regulating the storage and handling of fuels. Inspect the
unit’s fuel system frequently and correct any leaks immediately.
Fuel supply lines must be properly installed, purged and leak
tested according to applicable fuel-gas codes before placing
this equipment into service.
Diesel fuels are highly FLAMMABLE. Gaseous fluids such•
as natural gas and liquid propane (LP) gas are extremely
EXPLOSIVE. Natural gas is lighter than air, and LP gas is heavier
than air; install leak detectors accordingly.
1-3
Safety004 Rev. F 05/10
Safety Instructions
CALIFORNIA PROPOSITION 65 WARNING
Engine exhaust and some of its constituents are known
to the State of California to cause cancer, birth defects
and other reproductive harm.
CALIFORNIA PROPOSITION 65 WARNING
This product contains or emits chemicals known to the
State of California to cause cancer, birth defects and
other reproductive harm.

IDENTIFICATION RECORD
DATA LABEL
Every generator set has a DATA LABEL that contains important
information pertinent to the generator. The data label, which can be
found attached to the generator’s lower connection box, lists the
unit’s serial number and its rated voltage, amps, wattage capacity,
phase, frequency, rpm, power factor, production date, etc.
NOTE:
For actual information related to this particular model, please
refer to the Manual Drawing Listing located at the end of this
manual, or to the data label affixed to the unit.
Stationary Emergency Generator Model and Serial
Number
This number is the key to numerous engineering and manufactur-
ing details pertaining to your unit. Always supply this number
when requesting service, ordering parts or seeking information.
2-1
Identy005 Rev. D 05/10
General Information
Data Label

EQUIPMENT DESCRIPTION
This equipment is a revolving field, alternating current Stationary
Emergency Generator. It is powered by a gaseous fueled engine
operating at 1800 rpm for 4-pole direct drive units, 3600 rpm for
2-pole direct drive units and 2300 - 3000 rpm for quiet drive gear
units. See the Specifications section for exact numbers. The unit
comes complete with a sound attenuated enclosure, internally
mounted muffler, control console, mainline circuit breaker, bat-
tery charger, and protective alarms as explained in the following
paragraph.
All AC connections, including the power leads from the alterna-
tor, 120 volt battery charger input and control connections to the
transfer switch are available in the main connection box.
The Stationary Emergency Generator incorporates the following
alternator features:
Rotor and Stator insulation class is rated as defined by NEMA•
MG1-32.6, NEMA MG1-1.66. The generator is self ventilated
and drip-proof constructed. Refer to the Specifications section
or the data label for the class ratings.
The voltage waveform deviation, total harmonic content of the•
AC waveform and telephone influence factor have been evalu-
ated and are acceptable according to NEMA MG1-32.
ENGINE OIL RECOMMENDATIONS
The unit has been filled with 5W-20 engine oil at the factory. Use
a high-quality detergent oil classified “For Service SJ or SH.”
Detergent oils keep the engine cleaner and reduce carbon deposits.
When changing the engine oil, be sure to use 5W-30 engine oil.
n
Any attempt to crank or start the engine before
it has been properly serviced with the recom-
mended oil may result in an engine failure.
NOTE:
If not already equipped, it is strongly recommended to use the
optional Cold Weather Start Kit for temperatures below 32° F.
The part number for the Cold Weather Start Kit can be found
in the Specifications section or by contacting an authorized
dealer. The oil grade for temperatures below 32° F is 5W-30
synthetic oil.
COOLANT RECOMMENDATIONS
Use a mixture of half low silicate ethylene glycol base anti-freeze
and deionized water. Cooling system capacity is listed in the
specifications. Use only deionized water and only low silicate
anti-freeze. If desired, add a high quality rust inhibitor to the rec-
ommended coolant mixture. When adding coolant, always add the
recommended 50-50 mixture.
n
Do not use any chromate base rust inhibitor
with ethylene glycol base anti-freeze or chro-
mium hydroxide (“green slime”) forms and will
cause overheating. Engines that have been
operated with a chromate base rust inhibitor
must be chemically cleaned before adding eth-
ylene glycol base anti-freeze. Using any high
silicate anti-freeze boosters or additives will
also cause overheating. The manufacturer also
recommends that any soluble oil inhibitor is
NOT used for this equipment.
n
Do not remove the radiator pressure cap while
the engine is hot or serious burns from boiling
liquid or steam could result.
n
Ethylene glycol base antifreeze is poisonous.
Do not use mouth to siphon coolant from the
radiator, recovery bottle or any container. Wash
hands thoroughly after handling. Never store
used antifreeze in an open container because
animals are attracted to the smell and taste of
antifreeze even though it is poisonous to them.
3-1
Equip001 Rev. G 05/10
Equipment Description

ENGINE PROTECTIVE DEVICES
The Stationary Emergency Generator may be required to operate
for long periods of time without an operator on hand to monitor
such engine conditions as coolant temperature, oil pressure or
rpm. For that reason, the engine has several devices designed to
protect it against potentially damaging conditions by automatically
shutting down the unit when the oil pressure is too low, the coolant
temperature is too high, the coolant level is too low, or the engine
is running too fast.
NOTE:
Engine protective switches and sensors are mentioned here for
the reader’s convenience. Also refer to the applicable control
panel manual for additional automatic engine shutdown infor-
mation.
HIGH COOLANT TEMPERATURE SENDER
An analog coolant temperture sender, located in the engine's
cooling system will cause an engine shutdown if the temperature
should exceed approximately 125° C (257° F). The generator will
automatically restart once the temperature has returned to a safe
operating level.
LOW COOLANT LEVEL SENSOR
To prevent overheating, the engine has a low coolant level sensor.
If the level of engine coolant drops below the level of the low cool-
ant level sensor, the engine automatically shuts down.
LOW OIL PRESSURE SWITCH
This switch has normally closed contacts that are held open by
engine oil pressure during cranking and operating. Should oil pres-
sure drop below the 8 psi range, switch contacts close, and the
engine shuts down. The unit should not be restarted until oil is
added, and the AUTO/OFF/MANUAL switch must be turned to OFF
and then back to AUTO.
OVERCRANK SHUTDOWN
After a prespecified duration of cranking, this function ends the
cranking if the engine has failed to start. The overcrank message
will turn ON. Turn OFF the AUTO/OFF/MANUAL switch, then turn
switch back to AUTO to reset the generator control board.
NOTE:
If the fault is not corrected, the overcrank feature will continue
to activate.
Approximate Crank Cycle Times
15 seconds ON•
7 seconds OFF•
7 seconds ON•
7 seconds OFF•
Repeat for 45 seconds•
Approximately 90 seconds total.•
OVERSPEED SHUTDOWN
A speed circuit controls engine cranking, start-up, operation and
shutdown. Engine speed signals are delivered to the circuit board
whenever the unit is running. Should the engine overspeed above
a safe, preset value, the circuit board initiates an automatic engine
shutdown. Contact the nearest Authorized Dealer if this failure
occurs.
RPM SENSOR LOSS SHUTDOWN
If the speed signal to the control panel is lost, engine shutdown
will occur.
DC FUSES
A fuse (7.5 amp) is located on the control panel. It protects the
panel components from damaging overload. Always remove this
fuse before commencing work on the generator. The unit will not
start or crank if the fuse is blown.
A fuse (25 amp) is located in the engine wire harness adjacent
to the DC alternator. It is used to prevent circuit failure due to DC
alternator falure. It will also protect the system in the event of a
wiring short-dircuit. If this fuse is blown, the generator will not
operate. Replace these fuses with the same size, type, and rating.
4-1
EngProt003 Rev. B 05/10
Engine Protective Devices

FUEL SYSTEM
FUEL REQUIREMENTS
The Stationary Emergency Generator may be equipped with one of
the following fuel systems:
Natural gas fuel system•
Propane vapor (PV) fuel system•
Liquid propane (LP) fuel system•
Recommended fuels should have a Btu content of at least 1,000
Btu's per cubic foot for natural gas; or at least 2,520 Btu's per
cubic foot for LP gas. Ask the fuel supplier for the Btu content of
the fuel.
Required fuel pressure for natural gas is 5 inches to 14 inches
water column (0.18 to 0.5 psi); and for liquid propane, 5 inches
to 14 inches of water column (0.18 to 0.5 psi).
NOTE:
Any piping used to connect the generator to the fuel supply
should be of adequate size to ensure the fuel pressure NEVER
drops below five inches water column for natural gas or 5
inches water column for propane vapor for all load ranges. The
fuel supply piping shall be sized according to the installation
manual using the fuel consumption requirements identified in
the Specifications section of the Owner's Manual.
NOTE:
It is the responsibility of the installer to make sure that only
the correct recommended fuel is supplied to the generator fuel
system. Thereafter, the owner/operator must make certain that
only the proper fuel is supplied.
NATURAL GAS FUEL SYSTEM
Natural gas is supplied in its vapor state. In most cases, the gas
distribution company provides piping from the main gas distribu-
tion line to the standby generator site. The following information
applies to natural gas fuel systems.
Gas pressure in a building is usually regulated by national, state•
and local codes.
To reduce gas pressure to a safe level before the gas enters a•
building, a primary regulator is needed. The natural gas supplier
may or may not supply such a regulator.
It is the responsibility of the gas supplier to make sure sufficient•
gas pressure is available to operate the primary regulator.
Gas pressure at the inlet to the fuel shutoff solenoid should not•
exceed approximately 14 inches water column (0.5 psi).
PROPANE VAPOR WITHDRAWAL FUEL SYSTEM
This type of system utilizes the vapors formed above the liquid
fuel in the supply tank. Approximately 10 to 20 percent of the tank
capacity is needed for fuel expansion from the liquid to the vapor
state. The vapor withdrawal system is generally best suited for
smaller engines that require less fuel. The installer should be aware
of the following:
When ambient temperatures are low and engine fuel consump-•
tion is high, the vapor withdrawal system may not function
efficiently.
Ambient temperatures around the supply tank must be high•
enough to sustain adequate vaporization, or the system will not
deliver the needed fuel volume.
In addition to the cooling effects of ambient air, the vaporization•
process itself provides an additional cooling effect.
LP LIQUID FUEL SYSTEM
LP is supplied as a liquid in pressure tanks. It is usually made up
of propane, butane, or a mixture of the two gases. Propane tends
to vaporize readily even at temperatures as low as -20° F (-29° C).
However, butane reverts to its liquid state when temperatures drop
below 32° F (0° C).
LP in a liquid withdrawal system must be converted to its gaseous
state before it is introduced into the engine carburetor. A vaporizer-
converter is generally used to accomplish this. In such a converter,
heated engine coolant is ported through the converter to provide
the necessary heat for conversion of the fuel from a liquid to a
gaseous state.
5-1
FuelSys001 Rev. E 05/10
Fuel System

SPECIFICATIONS
STATIONARY EMERGENCY GENERATOR
Type ............................................................................. Synchronous
Rotor Insulation ................................................................... Class H
Stator Insulation .................................................................. Class H
Telephone Interference Factor (TIF).......................................... < 50
Alternator Output Leads 3-phase ........................................... 4-wire
Bearings .........................................................................Sealed Ball
Coupling .......................................................................Flexible Disc
Load Capacity (Standby Rating) ............................................45kW*
*NOTE: Generator rating and performance in accordance with ISO8528-5, BS5514, SAE J1349,
ISO3046 and DIN 6271 Standards. KW rating is based on LPG fuel and may derate with natural
gas.
Excitation System....................................................................Direct
Generator Output Voltage/kW - 60 Hz kW Amp CB Size
120/240V, 1-phase, 1.0 pf 45 188 200
120/208V, 3-phase, 0.8 pf 45 156 175
120/240V, 3-phase, 0.8 pf 45 135 150
277/480V, 3-phase, 0.8 pf 45 68 80
Generator Locked Rotor KVA Available @ Voltage Dip of 35%
Single-phase or 208, 3-phase (45kW) ............................... 72 KVA
480V, 3-phase (45kW)........................................................ 80 KVA
ENGINE
Make................................................................................... Generac
Model..................................................................................... In Line
Cylinders and Arrangement............................................................ 4
Displacement....................................................................... 2.4 Liter
Bore...................................................................................... 3.41 in.
Stroke ................................................................................... 3.94 in.
Compression Ratio...............................................................9.5-to-1
Air Intake System ...............................................Naturally Aspirated
Valve Seats....................................................................... Hardened
Lifter Type .......................................................................... Hydraulic
Spark Plug Gap.............................1.07-1.17mm (0.042-0.046 inch)
Engine Parameters
Rated Synchronous RPM..............................................60 Hz, 3600
Exhaust System
Exhaust Flow at Rated Output 60 Hz (45kW)..................... 420 cfm
Exhaust Temp. at Rated Output (45kW).............................. 1100° F
Combustion Air Requirements (Natural Gas)
Flow at rated power, 60 Hz (45kW)..................................... 144 cfm
Governor
Type .................................................................................. Electronic
Frequency Regulation ...................................................Isochronous
Steady State Regulation......................................................± 0.25%
Engine Lubrication System
Type of Oil Pump...................................................................... Gear
Oil Filter ............................................... Full Flow Spin-on, Cartridge
Crankcase Oil Capacity.......... 5.25 U.S. qts. (including filter capacity)
COOLING SYSTEM
Type ...................................................Pressurized Closed Recovery
Water Pump.................................................................... Belt Driven
Fan Speed .........................................................................2150 rpm
Fan Diameter.....................................................................22 inches
Fan Mode ................................................................................Puller
Air Flow (inlet air including alternator and
combustion air)...........................................................2725 ft3/min.
Coolant Capacity ........................................................ (3.0 U.S. gal.)
Heat Rejection to Coolant (45kW)..............................193,000 Btu/h
Maximum Operating Air Temp. on Radiator ..............60° C (150° F)
Maximum Ambient Temperature................................50° C (140° F)
FUEL SYSTEM
Type of Fuel......................................... Natural Gas, Propane Vapor
Carburetor ...................................................................... Down Draft
Secondary Fuel Regulator .................................................Standard
Fuel Shut-off Solenoid........................................................Standard
Operating Fuel Pressure ...................... 5 in. - 14 in. Water Column
Fuel Consumption - ft3/hr (Natural Gas/LPV)
Exercise 25% 50% 75% 100%
Cycle Load Load Load Load
45kW 65/25 210/83 380/151 545/216 730/290
ELECTRICAL SYSTEM
Battery Charge Alternator ............................................12V, 30 Amp
Static Battery Charger.........................................................2.5 Amp
Recommended Battery...................................... Group 26, 525CCA
System Voltage.....................................................................12 Volts
Voltage Regulator
Type .................................................................................. Electronic
Sensing........................................................................ Single-phase
Regulation ................................................................................± 1%
Features ..............................................Adjustable Voltage and Gain
Power Adjustment for Ambient Conditions
Temperature Deration
3% for every 10° C above °C (45kW) ........................................ 25
1.65% for every 10° above °F (45kW) ....................................... 77
Altitude Deration
1% for every 100 m above m (45kW) ...................................... 183
3% for every 1000 ft. above ft. (45kW)..................................... 600
Controller ................................................................. Nexus
6-1
GenSpec084 Rev. A 05/10
Specifications

WEATHER AND MAINTENANCE KITS
To keep the generator running at its peak, the following kits are
offered:
Cold Weather Kit•
~ Recommended for climates with temperatures below 32° F.
Extreme Cold Weather Kit•
~ Recommended Block Heater Kit for protection in tempera-
tures below 32° F.
Scheduled Maintenance Kit•
~ Kit includes the recommended parts to maintain the genera-
tor. Refer to the Service Schedule for regular maintenance
intervals.
For additional information, or to order any of these kits, please
contact an Authorized Service Dealer or Customer Service
Representative.
RECONFIGURING THE FUEL
SYSTEM
NOTE:
All models are configured to run on natural gas from the fac-
tory.
Before the generator can be operated using a LP fuel source, the
fuel system and control panel (refer to the installation drawing for
location) must be reconfigured. The steps to reconfigure the gen-
erator from a natural gas (NG) to a liquidified petroleum (LP) fuel
source are as follows:
FUEL SYSTEM
1. Turn the main gas supply off and disconnect the battery.
2. Remove the carburetor fuel hose from the outlet port of the
demand regulator (see Figure 6.1).
3. Disconnect the power wires from the fuel solenoid located
on top of the regulator assembly by removing the screw on
the front of the connector and pulling the connector forward,
away from the solenoid body.
4. Loosen the spring clamp on the small fuel enrichment line and
remove the hose from the hose barb.
5. Remove the black pipe assembly from the outlet port of the
demand regulator. The solenoid assembly may need to be
removed before performing this operation (Figure 6.1).
6. Remove the NG fuel jet (loosen counter clockwise) from the
outlet port.
7. Remove the LP fuel jet (loosen counter clockwise) from the jet
keeper port on the side of the regulator housing. Install this jet
into the outlet port in the regulator casting.
NOTE:
The jet sizes are stamped on the individual jets. The larger jet
size is used for running on NG.
8. Install the previously removed NG jet into the jet keeper port
on the side of the regulator housing.
9. Install the previously removed black pipe onto the outlet
port of the demand regulator. Use pipe sealant on the pipe
threads.
10. Reverse steps 1-4 in this procedure to reactivate the demand
regulator.
11. Follow the instructions in the Control Panel section.
n
Serious injury, including death, or damage may
occur if not configured properly. Please consult
an Authorized Dealer with any questions.
Figure 6.1 — Reconfigure the Fuel System
CONTROL PANEL
The FUEL TYPE must be reconfigured in the control panel to final-
ize the conversion process. To access the fuel selection menu,
select EDIT from the main control panel menu. Scroll through the
prompts until FUEL TYPE is displayed. Press ENTER to select this
field, then toggle the proper fuel type and press ENTER again to
accept. The fuel conversion is now complete.
n
Whenever the Generator's Fuel Regulator is
converted from one Fuel type to the other,
make sure to configure the Control Panel for
the correct Fuel type.
6-2
GenSpec084 Rev. A 05/10
Specifications

ALTERNATOR AC LEAD
CONNECTIONS
The electrical wires in the unit’s AC connection (lower) panel
should be installed according to the number of leads and the
voltage/phase required for the application. The voltage and phase
are described on the generator data label. The number of lead
wires can be identified using the Specifications section and the
power output rating on the generator data label. For example, if
the generator produces 130kW, 277/480 Volt, 3-phase power, the
generator has 12 alternator output leads. Figure 7.3 describes the
stator power winding connection for the generator.
FOUR-LEAD, SINGLE-PHASE STATOR
Four-lead alternators (see Figure 7.1) are designed to supply elec-
trical loads with voltage code “A” (240V, 1-phase, 60 Hz). Electrical
power is produced in the stator power windings. These windings
were connected at the factory to the main circuit breaker as shown
in Figure 7.1.
The rated voltage between each circuit breaker terminal is 240V.
The rated voltage between each circuit breaker terminal and the
neutral point 00 is 120V.
Figure 7.1 — Four-lead, Single-phase Stator
ALTERNATOR POWER WINDING
CONNECTIONS
3-PHASE ALTERNATORS ("Y" CONFIGURATION)
The Stationary Emergency Generator is designed to supply
3-phase electrical loads. Electric power is produced in the alterna-
tor power windings. These windings were connected at the factory
to the main circuit breaker with a “Y” configuration as shown in
Figures 7.2 through 7.6.
The rated voltage between circuit breaker terminals E1-E2, E1-E3
and E2-E3 is 480V, 208V or 600V depending on the model.
The rated voltage between each circuit breaker terminal and the
neutral point 00 is 277V, 120V, or 346V depending on the model.
Figure 7.2 — Stator Power Winding
Connections - 3-phase, 277/480V (6 Lead)
E1
S1
S6
S5
S4
S2
E2
S3
E3 L - N
L - L
INTERNAL
CONNECTIONS
00 (NEUTRAL)
Figure 7.3 — Stator Power Winding
Connections - 3-phase, 277/480V (12 Lead)
E1
S1
S4
S7
S12
S11
S10
S8
S5
S2
E2
S9
S6
S3
E3 L - N
L - L
7-1
ACConn007 Rev. B 05/10
General Information

Figure 7.4 — Stator Power Winding
Connections - 3-phase, 120/208V (6 Lead)
E3 E2
00 (NEUTRAL)
INTERNAL CONNECTIONS E1
L-L
L-N
S1 S1
S4 S4
S6
S6
S3
S3
S5
S5 S2
S2
Figure 7.5 — Stator Power Winding
Connections - 3-phase, 120/208V (12 Lead)
E3 E2
E1
L-L
L-N
S7 S1
S10 S4
S12
S6
S9
S3
S5
S11 S2
S8
Figure 7.6 — Stator Power Winding
Connections - 3-phase, 346/600V (6 Lead)
E1
S1
S6
S5
S4
S2
E2
S3
E3 L - N
L - L
INTERNAL
CONNECTIONS
00 (NEUTRAL)
3-PHASE ALTERNATORS ("DELTA" CONFIGURATION)
The Stationary Emergency Generator is designed to supply
3-phase electrical loads. Electric power is produced in the alterna-
tor power windings. These windings were connected at the factory
to the main circuit breaker with a “Delta” configuration as shown
in Figures 7.7 and 7.8.
The rated voltage between circuit breaker terminals E1-E2, E1-E3
and E2-E3 is 240V.
The rated voltage between E1 or E3 and the neutral point 00 is
120V.
Figure 7.7 — Stator Power Winding
Connections - 3-phase, 120/240V (6 Lead)
E2
E1 E3
INTERNAL
CONNECTIONS
S1
S6
S5
S4
S2
S3
L - N
L - L
00 (NEUTRAL)
Figure 7.8 — Stator Power Winding
Connections - 3-phase, 120/240V (12 Lead)
E2
E1 E3
S1
S12
S11
S8 S6
S5 S9
S10
S2
S3
L - N
L - L
00 (NEUTRAL)
7-2
ACConn007 Rev. B 05/10
General Information

CONTROL PANEL INTERFACE
USING THE AUTO/OFF/MANUAL SWITCH
nWith the switch set to AUTO, the engine may
crank and start at any time without warning.
Such automatic starting occurs when utility
power source voltage droops below a preset
level or during the normal exercise cycle. To
prevent possible injury that might be caused
by such sudden starts, always set the switch
to OFF and remove the fuse before work-
ing on or around the generator or transfer
switch. Then, place a “DO NOT OPERATE”
tag on the generator panel and on the trans-
fer switch.
1. “AUTO” Position – Selecting this switch activates fully auto-
matic system operation. It also allows the unit to automati-
cally start and exercise the engine every seven days with the
setting of the exercise timer (see the Setting the Exercise
Timer section).
2. “OFF” Position – This switch position shuts down the engine.
This position also prevents automatic operation.
3. “MANUAL” Position – Set the switch to MANUAL to crank
and start the engine. Transfer to standby power will not occur
unless there is a utility failure.
ACTIVATE THE GENERATOR
When battery power is applied to the generator during the instal-
lation process, the controller will turn ON and the LCD screen will
illuminate. However, the generator still needs to be activated before
it will automatically run in the event of a power outage.
Activating the generator is a simple one time process that is guided
by the controller screen prompts. Once the product is activated,
the controller screen will not prompt you again, even if you discon-
nect the generator battery.
To obtain the activation code, record the generator serial number
and log onto www.activategen.com or call 1-888-9ACTIVATE and
follow the steps to retrieve the activation code.
After obtaining your activation code, please complete the following
steps at the generator’s control panel in the Activation Chart on the
following page.
NOTE:
The generator will only run in manual until the passcode has
been entered.
Upon power up, this controller will go through a system self test
which will check for the presence of utility voltage on the DC
circuits. This is done to prevent damage if the installer mistakenly
connects AC utility power sense wires into the DC terminal block.
If utility voltage is detected, the controller will display a warning
message and lock out the generator, preventing damage to the
controller. Power to the controller must be removed to clear this
warning.
Utility voltage must be turned on and present at the N1 and N2
terminals inside the generator control panel for this test to be
performed and pass.
NOTE:
DAMAGE CAUSED BY MISWIRING OF THE INTERCONNECT
WIRES IS NOT WARRANTABLE!
This test will be performed each time the controller is powered
up.
Next, the user must enter the minimum settings to operate. These
settings are current date and time and exercise day and time. The
maintenance intervals will be initialized (i.e. started) the first time
the clock is set. If the clock is never set at power up, the mainte-
nance intervals will be reset every time power is applied.
If a subsequent power loss (loss of battery power) occurs the
Installation assistant will operate upon power restoration. The self
test routine will be run and then the customer will be required to
re-enter the time and date, as this is not retained during a power
loss. The unit will not require re-activation.
DISPLAY INTERFACE MENUS
The LCD display is organized as detailed below:
The “Home” page, this page is the default page which will be•
displayed if no keys are pressed for 30 seconds. This page
normally shows the current Status message and the current
date and time. The highest priority active Alarm and/or Warning
will be automatically posted on this page as well as flashing
the backlight when such an event is detected. In the case of
multiple Alarms or Warnings, only the first message will be
displayed. To clear an Alarm or Warning, see the Protection
Systems section - Clear Alarm.
The display backlight is normally off. If the user presses any•
key, the backlight will come on automatically and remain on for
30 seconds after the last key was pressed.
The “Main Menu” page will allow the user to navigate to all other•
pages or sub-menus by using the Left/Right and Enter keys.
This page can be accessed at any time with several presses of
the dedicated Escape key. Each press of the Escape key takes
you back to the previous menu until the main menu is reached.
This page displays the following options: HISTORY; STATUS;
EDIT; AND DEBUG. (See the Appendix - "Menu System".)
8-1
CntrlNex001 Rev. A 05/10
Control Panel

8-2
CntrlNex001 Rev. A 05/10
Control Panel
ACTIVATION CHART
CHOOSE LANGUAGE TROUBLESHOOTING
Display Reads: Use ARROW keys to scroll to desired lan-
guage. Press ENTER to select.
If the wrong language is chosen, it can be
changed later using the “edit” menu.
Display Reads: Press ENTER to begin the activation pro-
cess.
If ESCAPE is pressed instead of ENTER,
your generator will only run in manual mode
(for test purposes) and NOT ACTIVATED will
be displayed. You will need to reconnect the
battery and begin with Step 1.
Display Reads: If you do not have your activation code,
go to www.activategen.com or call
1-888-9ACTIVATE (922-8482).
If you already have your activation code,
wait 3-5 seconds for the next display.
ENTER ACTIVATION CODE (Passcode) TROUBLESHOOTING
Display Reads: Use ARROW keys to scroll and find the first
number of your Activation Code.
Press ENTER to select.
Repeat this step until all digits have been
entered.
Use ESCAPE to correct previous digits.
Display Reads: Activation is complete when all digits are
entered above and your screen shows this
display.
Follow the controller prompts to continue
setting the time function. Refer to your
Owner’s Manual with questions.
What happens if “Wrong Passcode Try
Again” appears?
Re-enter the activation code. If a second
attempt is unsuccessful, check the number
against the code given on activategen.com.
If it is correct and the generator will not
accept it, contact 1-888-9ACTIVATE (922-
8482).
“SELECT HOUR (0-23)”
“- +”6
Escape Enter
Serial 123456789
Passcode XXXXX +/-
Escape Enter
To Activate go to
www.activategen.com
Escape Enter
Activate me (ENT) or
ESC to run in manual
Escape Enter
Language
- English +
Escape Enter

INSTALLATION ASSISTANT
Interconnect System Self Test Feature (follow the on-screen
prompts).
Upon power up, this controller will go through a system self test
which will check for the presence of utility voltage on the DC
circuits. This is done to prevent damage if the installer mistakenly
connects AC utility power sense wires into the DC terminal block.
If utility voltage is detected, the controller will display a warning
message and lock out the generator, preventing damage to the
controller. Power to the controller must be removed to clear this
warning.
Utility voltage must be turned on and present at the N1 and N2
terminals inside the generator control panel for this test to be
performed and pass.
NOTE:
DAMAGE CAUSED BY MISWIRING OF THE INTERCONNECT
WIRES IS NOT WARRANTABLE!
This test will be performed each time the controller is powered
up.
Upon first power up of the generator, the display interface will
begin an installation assistant. The assistant will prompt the user
to set the minimum settings to operate. These settings are simply:
Current Date/Time and Exercise Day/Time. The maintenance inter-
vals will be initialized when the exercise time is entered.
The exercise settings can be changed at any time via the "EDIT"
menu (see Appendix, "Menu System").
If the 12 volt battery is disconnected or the fuse removed, the
Installation Assistant will operate upon power restoration. The
only difference is the display will only prompt the customer for the
current Time and Date.
IF THE INSTALLER TESTS THE GENERATOR PRIOR TO
INSTALLATION, PRESS THE “ENTER” KEY TO AVOID SETTING
UP THE EXERCISE TIME. THIS WILL ENSURE THAT WHEN
THE CUSTOMER POWERS UP THE UNIT, HE WILL STILL BE
PROMPTED TO ENTER AN EXERCISE TIME.
SETTING THE EXERCISE TIMER
This generator is equipped with an exercise timer. Once it is set,
the generator will start and exercise every seven days, on the day
of the week and at the time of day specified. During this exercise
period, the unit runs for approximately 12 minutes and then shuts
down. Transfer of loads to the generator output does not occur
during the exercise cycle unless utility power is lost.
LOW SPEED EXERCISE
The standard start sequence will be initiated.
All 1800 rpm units will exercise at 1400 RPM•
All 3600 rpm units will exercise at 1800 RPM•
If utility is lost during exercise the controller will do the following:
Wait for the “line interrupt period” for utility to return. If utility•
returns within the “line interrupt period”, continue to exercise
at low RPM.
If utility is still lost after the “line interrupt period”, run the engine•
up to normal RPM and transfer the load. At this time the con-
troller will exit the exercise routine and assume full automatic
operation.
USER ADJUSTABLE SETTINGS
Setting Factory
Default
Minimum
Setting
Maximum
Setting Increment
Exercise
time 2 pm 00:00 (12 am) 23:59 (11:59 pm) 1 min
Exercise
day Wed Sun Sat 1 day
Current
Time 12 am 00:00 (12 am) 23:59 (11:59 pm) 1 min
Current
Day Sun Sun Sat 1 day
Current
Month Jan Jan Dec 1 month
Current
Year 2008 2008 2100 1 year
Language English French Spanish N/A
Contrast 80% 0% 100% 1%
FUEL CONVERSION
For fuel conversion steps, refer to the GenSpec section,
RECONFIGURING THE FUEL SYSTEM.
OPERATION
This system is intended to supply standby power in the event of a
utility failure. The control system will monitor the utility voltage to
determine if stand-by power is required. Should the utility voltage
fail, the generator will start and run normally, detaching from the
utility and supplying the customer load from the generator. When
utility power returns, the controller will re-transfer the customer
load back to utility and shut down the generator.
AUTOMATIC TRANSFER OPERATION
To select automatic operation, do the following:
1. Make sure the transfer switch main contacts are set to their
UTILITY position, i.e., loads connected to the utility power
source.
2. Be sure that normal UTILITY power source voltage is avail-
able to transfer switch terminal lugs N1 and N2 (Refer to the
Electrical Data section).
3. Set the generator’s AUTO/OFF/MANUAL switch to AUTO.
4. Set the generator’s main circuit breaker to its ON (or CLOSED)
position.
With the preceding steps complete, the generator will start auto-
matically when utility source voltage drops below a preset level.
After the unit starts, loads are transferred to the standby power
source. Refer to the Sequence of Automatic Operation section.
8-3
CntrlNex001 Rev. A 05/10
Control Panel

SEQUENCE OF AUTOMATIC OPERATION
Initial Conditions: Generator in Auto ready to run, load being sup-
plied by the Utility Source through the transfer switch.
1. When the utility voltage fails (falls below 60% of nominal), a
10-30 second (programmable) “line interrupt” delay timer is
started. The factory set time delay is 10 seconds. If at the
end of the line interrupt time the utility voltage is above 60%
the engine will not crank. If the utility voltage is still below
the 60% of nominal at the end of the line interrupt time, the
unit will crank and start. If the unit cranks for more than 10
seconds and the utility voltage rises above 80% of nominal
(programmed pickup voltage) and the unit has not started, the
crank cycle will abort.
2. As soon as the unit starts a 5 second “warm-up” timer is initi-
ated. When the warm-up timer expires the control will transfer
the load to the generator (through the RTS switch) if the utility
voltage is less than 80% of nominal. If the utility voltage is
greater than the 80% of nominal at the end of the warm-up
time the load will not be transferred to the generator and a one
minute low-speed cool down period will start. At the end of
the one minute cool down period the generator will stop.
3. Once the unit is running and the switch has transferred the
load to the generator the unit will monitor utility voltage.
When utility voltage returns (above the programmable pickup
voltage, normally 80% of nominal), a 15 second “Return to
Utility” timer will start. At the end of the return to utility time,
if the utility voltage is still above the pickup voltage, the unit
will transfer the load back to the utility source and run the unit
through a one minute cool down period. When the cool down
period is over the unit will shut down and be ready for the next
outage.
4. If during the cool down period utility voltage should fall below
60% of nominal for the line interrupt delay period, the unit will
transfer the load back to the generator and continue to moni-
tor the utility.
CRANK CYCLES AND OVERCRANK SHUTDOWN
If the unit fails to start during a cranking period it will display the
Overcrank Shutdown Alarm. The system will control the cranking
cycles as follows:
The first crank cycle is a 16 second crank time followed by a 7
second rest. The next 5 cycles will be 7 seconds of cranking time
each followed by a 7 second rest time.
If the unit fails to start by the end of the 6 crank/rest cycles
the Overcrank Shutdown Alarm will display and the unit will not
attempt to crank until the alarm is reset.
AUTO START
This unit is designed to automatically start in the event of a util-
ity failure or brown out condition. Brown out is defined as utility
voltage less than 60% nominal, while utility is considered good
when it is restored to at least the pickup value, 80% of nominal.
These levels are fixed. The “Line Interrupt period” is an adjustable
parameter by the dealer. If 2-wire start mode is activated, the unit
will start when 2-wire start is active.
MANUAL START
Allows the user to start and run the generator manually.
Transfer of the load to the generator will occur if utility is lost while
the unit is running in the manual mode (only if activated).
ALARM AND WARNING MESSAGES
Alarms are defined as “Latching” which means they must be
cleared before the alarm message on the screen will clear. They
can be of type “Shutdown” or not and are logged in the alarm log.
Alarms are all annunciated on the display).
Warnings are “Non Latching” meaning the message automati-
cally clears when the warning condition goes away. Warnings can
not be of type “Shutdown” but they are logged in the alarm log.
Warnings are all annunciated on the display.
LOW OIL PRESSURE SHUTDOWN ALARM
There is a 10 second delay before oil pressure is monitored.
HIGH COOLANT TEMPERATURE SHUTDOWN ALARM
There is a 10 second delay before engine temperature is moni-
tored.
Once running there is a 1/4 second delay before shut down. The
limit is set at 125° C or 257° F.
OVERCRANK SHUTDOWN ALARM
Occurs if the engine has not started within the specified crank
cycle.
OVERSPEED SHUTDOWN ALARM
Warning indicator is measured and calculated by the microproces-
sor. Overspeed is defined as +20% of nominal engine speed for 3
seconds, or +25% immediate.
Nominal engine speed = 60.0 Hz
RPM SENSOR FAILURE SHUTDOWN ALARM
During cranking: If the board does not see a valid RPM signal
within four (4) seconds of cranking it will shut down and lock out
on RPM sensor loss.
During running: If the RPM signal is lost for one full second the
board will shut the engine down, wait 15 seconds, then re-crank
the engine if in AUTO, it will not re-crank in MANUAL.
If no RPM signal is detected within the first four (4) seconds of
cranking, the control board will shut the engine down and latch out
on RPM sensor loss.
If the RPM signal is detected the engine will start and run normally.
If the RPM signal is subsequently lost the control board will try
two more re-cranks before latching out and flashing the RPM
Sensor Failure message (if it is in AUTO).
8-4
CntrlNex001 Rev. A 05/10
Control Panel

UNDER-FREQUENCY SHUTDOWN ALARM
After starting, if the generator stays under frequency for more than
30 seconds, it will shutdown.
LOW BATTERY ALARM
While running if the average battery voltage falls below 11.9 volts
for one (1) minute, the low battery alarm will be displayed.
LOW BATTERY WARNING
The microprocessor will continually monitor the battery voltage
and display the Low Battery Voltage message if the battery voltage
falls below 12.2 Volts for one (1) minute.
No other action is taken on a low battery warning condition. The
warning will automatically clear if the battery voltage rises above
12.2 volts.
NOTE:
The battery sentinel is a separate feature that monitors battery
condition.
LOW COOLANT LEVEL ALARM
This is a shutdown alarm. The sensor will be continuously moni-
tored. If an error condition is seen for five (5) consecutive sec-
onds, the alarm will be displayed.
MISSING CAM PULSE ALARM
This is a shutdown alarm. The alarm will activate after five (5)
seconds of continuously missing cam pulses.
MISSING CRANK PULSE ALARM
This is a shutdown alarm. The alarm will activate after 12 con-
secutive revs where crank pulses are missing.
LOW FUEL PRESSURE WARNING
Fuel pressure is monitored by a digital sensor with a fixed setpoint
of below five (5) inches water column.
GOVERNOR SENSOR FAULT ALARM
The governor position is monitored by an analog feedback signal. If
the throttle position is seen outside of the normal operating range,
a shutdown alarm is displayed. If the throttle is commanded to
move, and no movement is seen, a shutdown alarm is displayed.
WIRING ERROR ALARM
When power is first apllied to the contoller, the software will per-
form a check on the wiring of the transfer output, and ensure it
does not have high voltage on the wire. If this is the case, it will
signal a miswire alarm and will not run. The test can be skipped
by use of the escape key.
UNDERVOLTAGE ALARM
If the generator voltage falls below 60% for >5 seconds, an alarm
will be issued.
8-5
CntrlNex001 Rev. A 05/10
Control Panel
Figure 1 – Generator Control Panel

MAINTENANCE ALERT CHART
CONDITION 1.6 CHERY 2.4/1800 MITSU 2.4/3600 MITSU 4.2 FORD
Change oil & filter alert 3mo/30hrs break-in
1yr/100hrs
3mo/30hrs break-in
1yr/100hrs
3mo/30hrs break-in
1yr/100hrs
3mo/30hrs break-in
1yr/100hrs
Inspect/clean air inlet &
exhaust alert
3mo/30hrs break-in
6mo/50hrs
3mo/30hrs break-in
6mo/50hrs
3mo/30hrs break-in
6mo/50hrs
3mo/30hrs break-in
6mo/50hrs
Change / Inspect air filter
alert
1yr/100hr 1yr/100hr 1yr/100hr 1yr/100hr
Inspect spark plugs alert 1yr /100hrs 1yr /100hrs 1yr /100hrs 1yr /100hrs 1yr /100hrs
Change / Inspect spark
plugs alert
2yr/ 250hr 2yr/ 250hr 2yr/ 250hr 2yr/ 250hr
Inspect Accessory drive
alert
3mo/30hrs break-in
1yr /100hrs
3mo/30hrs break-in
1yr /100hrs
3mo/30hrs break-in
1yr /100hrs
3mo/30hrs break-in
1yr /100hrs
Coolant change & flush 1yr /100hrs 1yr /100hrs 1yr /100hrs 1yr /100hrs
Inspect battery alert 1yr /100hrs 1yr /100hrs 1yr /100hrs 1yr /100hrs
OVERVOLTAGE ALARM
If the generator voltage rises above 110% for >3 seconds, an
alarm will be issued.
If the generator voltage rises above 130% for >0.2 seconds, an
alarm will be issued.
INTERNAL FAILURE SHUTDOWN ALARM
Any internal failure that can be detected such as corrupted
firmware will cause this shutdown alarm. This alarm cannot be
cleared.
CANBUS ALARM
Where applicable, if the Canbus communications link fails to com-
municate, a “Canbus alarm” will be generated. This only applies
to systems with external ignition modules. The alarm may be
generated if:
1. The physical link is broken.
2. The ignition module fails or resets.
3. The Nexus module fails or resets.
IGNITION ALARM
When an ignition alarm occurs, a generic message “Ignition Fault”
will be displayed as the fault code.
MAINTENANCE WARNING
When a maintenance period expires, a warning message will be
posted. The warning can be reset by hitting the Enter key. Resetting
will clear the warning and reset the maintenance counters for the
condition annunciated. The history log will reflect the maintenance
warning.
ALARM CANCEL
When the generator is shut down due to a latching alarm, the Auto
/Off/ Manual switch must be set to the off position and the ENTER
key pressed to unlatch any active fault and clear the corresponding
fault alarm message.
COMMON ALARM RELAY
The common alarm relay will be activated if there is a shutdown
alarm. It will not activate on warnings or indicate that the Auto/Off/
Manual switch is in the OFF position. The OFF position will clear
the alarms and the relay. The relay will not be used to indicate a
generator is not activated.
MAINTENANCE ALERTS
Maintenance alerts will be provided for these conditions (see the
Maintenance Alert Chart).
SERVICE SCHEDULE ‘A’
Inspect Accessory drive alert 1yr /100hrs
Coolant change & flush 1yr /100hrs
Inspect spark plugs alert 1yr /100hrs
Change oil & filter alert 1yr /100hrs
Inspect battery alert 1yr /100hrs
Change / Inspect air filter alert 1yr /100hrs
SERVICE SCHEDULE ‘B’
Change / Inspect spark plugs alert 2yr/ 250hr
8-6
CntrlNex001 Rev. A 05/10
Control Panel

ACTIVATION
RUN LOGALARM LOG
HISTORY STATUS
COMMANDSTATE VERSIONSDISPLAY
GENERATOR
FREQUENCY
ENGINE
HOURS
ENGINE
RPM
BATTERY
VO LTAGE
DEBUG
INPUTS OUTPUTS DISPLAYS
EDIT
CONTRAST
LANGUAGE
TIME/DATE
EXERCISE
TIME/SPEED
ESC Press the “ESCAPE” key
to jump back up through the menu levels.
+ / - Use the “+/-” key
to navigate through the menu.
ENTER Use the “ENTER” key
to select items or enter data.
ESC
ESC
ESC
ESC
ESC ESC
RESET
MAINTENANCE
QT TEST
MAIN MENU
HOURS UNDER
LOAD
FUEL
SELECTION
LINE INTERRUPT
DELAY
8-7
CntrlNex001 Rev. A 05/10
Control Panel
MENU SYSTEM