GENERATOREU22iOWNER'S MANUAL32Z4460000X32-Z44-6000PANTONE186CBkC Honda Motor Co., Ltd. 2018Printed in Thailand

Keep this owner’s manual handy, so that you can refer to it any time.This owner’s manual is considered a permanent part of the generatorand should remain with the generator if resold.The information and specifications included in this publication were ineffect at the time of approval for printing. Honda Motor Co., Ltd.reserves the right, however, to discontinue or change specifications ordesign at any time without notice and without incurring any obligationwhatsoever. Page 1 Friday, February 2, 2018 3:46 PMINTRODUCTIONCongratulations on your selection of a Honda generator. We are certainyou will be pleased with your purchase of one of the finest generatorson the market.We want to help you get the best results from your new generator andto operate it safely. This manual contains the information on how todo that; please read it carefully.As you read this manual, you will find information preceded by asymbol. That information is intended to help you avoiddamage to your generator, other property, or the environment.We suggest you read the warranty policy to fully understand itscoverage and your responsibilities of ownership.When your generator needs scheduled maintenance, keep in mind thatyour Honda servicing dealer is specially trained in servicing Hondagenerators. Your Honda servicing dealer is dedicated to yoursatisfaction and will be pleased to answer your questions andconcerns.Best Wishes,Honda Motor Co., Ltd.1 Page 2 Friday, February 2, 2018 3:46 PMA FEW WORDS ABOUT SAFETYYour safety and the safety of others are very important. And using thisgenerator safely is an important responsibility.To help you make informed decisions about safety, we have providedoperating procedures and other information on labels and in thismanual. This information alerts you to potential hazards that couldhurt you or others.Of course, it is not practical or possible to warn you about all thehazards associated with operating or maintaining a generator. Youmust use your own good judgment.You will find important safety information in a variety of forms,including: Safety Labels — on the generator. Safety Messages — preceded by a safety alert symboland oneof three signal words, DANGER, WARNING, or CAUTION.These signal words mean:You WILL be KILLED or SERIOUSLY HURT ifyou don’t follow instructions.You CAN be KILLED or SERIOUSLY HURT ifyou don’t follow instructions.You CAN be HURT if you don’t followinstructions. Safety Headings — such as IMPORTANT SAFETY INFORMATION. Safety Section — such as GENERATOR SAFETY. Instructions — how to use this generator correctly and safely.This entire book is filled with important safety information — pleaseread it carefully.The illustrations in this manual are based on: R type2 Page 3 Friday, February 2, 2018 3:46 PMCONTENTSGENERATOR SAFETY .6IMPORTANT SAFETY INFORMATION .6Operator Responsibility.6Carbon Monoxide Hazards.6Electric Shock Hazards .7Fire and Burn Hazards .7Refuel With Care .8SAFETY LABEL LOCATIONS.9CONTROLS & FEATURES.10COMPONENT & CONTROL LOCATIONS.10CONTROLS.12Engine Switch .12Starter Grip.12Fuel Filler Cap Vent Lever .13Choke Lever.13Eco Throttle Switch.14Parallel Operation Outlets .14DC Receptacle .15DC Circuit Protector .15FEATURES.16Ground Terminal.16Output Indicator .17Overload Alarm (Indicator) .18Oil Alert Indicator.18LED Light Patterns .19BEFORE OPERATION .20ARE YOU READY TO GET STARTED?.20Knowledge.20IS YOUR GENERATOR READY TO GO?.20Check the Engine .213 Page 4 Friday, February 2, 2018 3:46 PMCONTENTSOPERATION .22SAFE OPERATING PRECAUTIONS.22STARTING THE ENGINE .23STOPPING THE ENGINE .26AC OPERATION.28AC Applications.30AC PARALLEL OPERATION (optional equipment).31Parallel operation with EU20i .34AC Parallel Operation Applications .35DC OPERATION.37ECO THROTTLE SYSTEM.40STANDBY POWER .41Connections to a Building’s Electrical System .41System Ground .41Special Requirements.42SERVICING YOUR GENERATOR.43THE IMPORTANCE OF MAINTENANCE.43MAINTENANCE SAFETY.44Safety Precautions .44MAINTENANCE SCHEDULE .45REFUELING .46FUEL RECOMMENDATIONS.47ENGINE OIL LEVEL CHECK .48ENGINE OIL CHANGE.49ENGINE OIL RECOMMENDATIONS .50AIR CLEANER SERVICE .51MAIN AND OUTER FILTER CLEANING .53SPARK PLUG SERVICE.54STORAGE.56STORAGE PREPARATION.56Cleaning.56Fuel.56Engine Oil .59Engine Cylinder.59STORAGE PRECAUTIONS .60REMOVAL FROM STORAGE.604 Page 5 Friday, February 2, 2018 3:46 PMCONTENTSTRANSPORTING.61TAKING CARE OF UNEXPECTED PROBLEMS .62ENGINE WILL NOT START.62ENGINE LACKS POWER.63NO POWER AT THE AC RECEPTACLES.64NO POWER AT THE DC RECEPTACLES.64TECHNICAL INFORMATION .65Serial Number Location .65Carburetor Modification for High Altitude Operation.66Specifications.67WIRING DIAGRAM.68CONSUMER INFORMATION .70Australia Distributor Information .705 Page 6 Friday, February 2, 2018 3:46 PMGENERATOR SAFETYIMPORTANT SAFETY INFORMATIONHonda generators are designed for use with electrical equipment thathas suitable power requirements. Other uses can result in injury to theoperator or damage to the generator and other property.Most injuries or property damage can be prevented if you follow allthe instructions in this manual and on the generator. The mostcommon hazards are discussed below, along with the best way toprotect yourself and others.Operator Responsibility Know how to stop the generator quickly in case of emergency. Understand the use of all generator controls, output receptacles,and connections. Be sure that anyone who operates the generator receives properinstruction. Do not let children operate the generator withoutparental supervision.Carbon Monoxide HazardsA generator's exhaust contains toxic carbon monoxide, which youcannot see or smell. Breathing carbon monoxide can KILL YOU INMINUTES. To avoid carbon monoxide poisoning, follow theseinstructions when operating a generator: Only run a generator OUTSIDE, far away from windows, doors, andvents. Never operate a generator inside a house, garage, basement, crawlspace, or any enclosed or partially enclosed space. Never operate a generator near open doors or windows. Get fresh air and seek medical attention immediately if you suspectyou have inhaled carbon monoxide.Early symptoms of carbon monoxide exposure include headache,fatigue, shortness of breath, nausea, and dizziness. Continuedexposure to carbon monoxide can cause loss of muscularcoordination, loss of consciousness, and then death.6 Page 7 Friday, February 2, 2018 3:46 PMGENERATOR SAFETYElectric Shock Hazards The generator produces enough electric power to cause a seriousshock or electrocution if misused. Using a generator or electrical appliance in wet conditions, such asrain or snow, or near a pool or sprinkler system, or when your handsare wet, could result in electrocution. Keep the generator dry. If the generator is stored outdoors, unprotected from the weather,check all of the electrical components on the control panel beforeeach use. Moisture or ice can cause a malfunction or short circuit inelectrical components that could result in electrocution. Do not connect to a building’s electrical system unless an isolationswitch has been installed by a qualified electrician. For parallel operation, use only a Honda approved receptacle box(optional equipment) when connecting the generator combinationsshown below.EU22i and EU22iEU22i and EU20i ** An EU22i can only be paired with EU20i models that have serialnumbers within the ranges shown below.Applicable frame serial number of EU20iEAAJ -2032188 and laterEACT -1000001 and later Never connect an EU22i generator to a different generator model,other than the models specified above.Fire and Burn Hazards The exhaust system gets hot enough to ignite some materials.– Keep the generator at least 1 meter away from buildings andother equipment during operation.– Do not enclose the generator in any structure.– Keep flammable materials away from the generator. The muffler becomes very hot during operation and remains hot fora while after stopping the engine. Be careful not to touch the mufflerwhile it is hot. Let the engine cool before storing the generatorindoors.7 Page 8 Friday, February 2, 2018 3:46 PMGENERATOR SAFETYRefuel With CareGasoline is extremely flammable, and gasoline vapor can explode.Do not refuel during operation.Allow the engine to cool if it has been in operation.Refuel only outdoors in a well-ventilated area and on a level surface.Never smoke near gasoline, and keep other flames and sparks away.Do not overfill the fuel tank.Make sure that any spilled fuel has been wiped up and cleaned beforestarting the engine.Always store gasoline in an approved container.8 Page 9 Friday, February 2, 2018 3:46 PMGENERATOR SAFETYSAFETY LABEL LOCATIONSThese labels warn you of potential hazards that can cause seriousinjury. Read them carefully. If a label comes off or becomes hard toread, contact your Honda servicing dealer for a replacement.9 Page 10 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESCOMPONENT & CONTROL LOCATIONSUse the illustrations on these pages to locate and identify the mostfrequently used controls.AIR CLEANERCHOKE LEVERFUEL FILLER CAP VENT LEVERFUEL FILLER CAPMAINTENANCE COVERSTARTER GRIPENGINE SWITCHSPARK PLUGSPARK PLUG MAINTENANCE COVERMUFFLERFRAME SERIAL NUMBER10 Page 11 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESPARALLEL OPERATION OUTLETSECO THROTTLE SWITCHAC RECEPTACLESOIL ALERT INDICATOROVERLOAD INDICATORDC RECEPTACLEOUTPUT INDICATORDC CIRCUIT PROTECTORGROUND TERMINAL11 Page 12 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESCONTROLSEngine SwitchThe engine switch controls theignition system and the fuelvalve.ENGINESWITCHONOFF – Stops the engine andcloses the fuel valve.FUEL OFF – Keeps the ignitionsystem ON, and closes only thefuel valve. (see page 26)FUEL OFFOFFON – Running position; opens thefuel valve and allows the engineto be started.Starter GripPulling the starter grip operatesthe recoil starter to start theengine.Do not allow the starter grip tosnap back against the generator.Return it gently to preventdamage to the starter.12STARTERGRIP Page 13 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESFuel Filler Cap Vent LeverThe fuel filler cap is provided with a vent lever to seal the fuel tank.The vent lever must be in the ON position for the engine to run.When the engine is not in use, leave the vent lever in the OFF positionto reduce the possibility of fuel leakage. Allow the engine to cool wellbefore turning the vent lever to the OFF position.OFFONOFFFUEL FILLER CAPONFUEL FILLER CAP VENT LEVERChoke LeverThe choke is used to provideproper starting mixture when theengine is cold. It can be openedand closed by operating the chokelever manually. Move the chokelever to the CLOSED position toenrich the mixture for coldstarting.CHOKE LEVEROPENCLOSED13 Page 14 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESEco Throttle SwitchThe Eco Throttle system automatically reduces engine speed whenloads are turned off or disconnected. When appliances are turned on orreconnected, the engine returns to the proper speed to power theelectrical load.If high electrical loads are connected simultaneously, turn theEco Throttle switch to the OFF position to reduce voltage changes.When using the DC output, turn the Eco Throttle switch to the OFFposition.ON: Recommended to minimize fuel consumption and further reducenoise levels when less than a full load is applied to the generator.OFF: The Eco Throttle system does not operate.ECO THROTTLE SWITCHOFFONParallel Operation OutletsThese outlets are used for connecting both types of the EU22igenerator or EU20i generator for parallel operation (see page 31through 36). A Honda approved receptacle box (optional equipment) isrequired for parallel operation. This receptacle box can be purchasedfrom an authorized Honda generator dealer.PARALLEL OPERATION OUTLETS14 Page 15 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESDC ReceptacleThe DC receptacle should ONLY be used for charging 12-voltautomotive type batteries. The DC charging output is not regulated.This means that the charging output does not decrease as the batteryreaches full charge.Check the battery voltage frequently while charging to preventovercharging the battery.DC Circuit ProtectorThe DC circuit protector automatically shuts off the DC batterycharging circuit when the DC charging circuit is overloaded, whenthere is a problem with the battery, or when the connections betweenthe battery and the generator are improper. However, the DC circuitprotector does not prevent overcharging.DC RECEPTACLEOFFPUSHONDC CIRCUIT PROTECTOR15 Page 16 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESFEATURESGround TerminalThe generator ground terminal is connected to the frame of thegenerator, the metal non-current-carrying parts of the generator, andthe ground terminals of each receptacle.Before using the ground terminal, consult a qualified electrician,electrical inspector, or local agency having jurisdiction for local codesor ordinances that apply to the intended use of the generator.GROUND TERMINAL16 Page 17 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESOutput IndicatorThe output indicator (green) is illuminated when the generator isoperating normally. It indicates that the generator is producingelectrical power at the receptacles.In addition, the output indicator has a simplified hour meter function.When you start the engine, the indicator blinks according to thegenerator’s cumulative operating hours as follows: No blinks:1 blink:2 blinks:3 blinks:4 blinks:5 blinks:0–100 hours100–200 hours200–300 hours300–400 hours400–500 hours500 or more hoursOUTPUT INDICATOR(GREEN)17 Page 18 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESOverload Alarm (Indicator)If the generator is overloaded (in excess of 2.2 kVA), or if there is a shortcircuit in a connected appliance, the overload indicator (red) will comeON. The overload indicator (red) will stay ON, and after about fourseconds, current to the connected appliance(s) will shut off, and theoutput indicator (green) will go OFF. However, the engine will continueto run.If the overload indicator blink continuously,it suggests an abnormal ofinverter unit (see page 64).OVERLOAD INDICATOR(RED)Oil Alert IndicatorThe Oil Alert system is designed to prevent engine damage caused byan insufficient amount of oil in the crankcase. Before the oil level inthe crankcase can fall below a safe limit, the Oil Alert indicator (red)comes ON and the Oil Alert system automatically will stop the engine(the engine switch will remain in the ON position).If the engine stops or the Oil Alert indicator (red) comes ON when youpull the starter grip, check the engine oil level (see page 48) beforetroubleshooting in other areas.OIL ALERT INDICATOR(RED)18 Page 19 Friday, February 2, 2018 3:46 PMCONTROLS & FEATURESLED Light PatternsOIL ALERT INDICATOROVERLOAD INDICATOROUTPUT sible causeOperatingnormallyInverter unitfailureOutputovercurrentInverter unitoverheatEngine oil lowOutput IndicatorOverload indicatorOil Alert Indicator: ON: OFF: BlinkingRefer to TAKING CARE OF UNEXPECTED PROBLEMS on page 64 forfailure diagnosis.19 Page 20 Friday, February 2, 2018 3:46 PMBEFORE OPERATIONARE YOU READY TO GET STARTED?Your safety is your responsibility. A little time spent in preparation willsignificantly reduce your risk of injury.KnowledgeRead and understand this manual. Know what the controls do and howto operate them.Familiarize yourself with the generator and its operation before youbegin using it. Know how to quickly shut off the generator in case ofan emergency.If the generator is being used to power appliances, be sure that they donot exceed the generator’s load rating (see pages 30 and 36).IS YOUR GENERATOR READY TO GO?For your safety, to ensure compliance with environmental regulations,and to maximize the service life of your equipment, it is very importantto take a few moments before you operate the generator to check itscondition. Be sure to take care of any problem you find, or have yourservicing dealer correct it, before you operate the generator.Failure to properly maintain thisgenerator, or failing to correct aproblem before operation, couldresult in a significant malfunction.Some malfunctions can causeserious injuries or death.Always perform a pre-operationinspection before each operationand correct any problems.20 Page 21 Friday, February 2, 2018 3:46 PMBEFORE OPERATIONTo prevent a possible fire, keep the generator at least 1 meter awayfrom building walls and other equipment during operation. Do notplace flammable objects close to the engine.Before beginning your pre-operation checks, be sure the generator ison a level surface and the engine switch is in the OFF position.Check the Engine Before each use, look around and underneath the engine for signs ofoil or gasoline leaks. Check the engine oil level (see page 48). A low engine oil level willcause the Oil Alert system to shut down the engine. Check the air filters (see page 51). Dirty air filters will restrict air flowto the carburetor, reducing engine and generator performance. Check the fuel level (see page 46). Starting with a full tank will helpto eliminate or reduce operating interruptions for refueling.21 Page 22 Friday, February 2, 2018 3:46 PMOPERATIONSAFE OPERATING PRECAUTIONSBefore operating the generator for the first time, review chaptersGENERATOR SAFETY (see page 6) and BEFORE OPERATION (see page20).For your safety, do not operate the generator in an enclosed area suchas a garage. Your generator’s exhaust contains poisonous carbonmonoxide gas that can collect rapidly in an enclosed area and causeillness or death.Exhaust contains poisonous carbonmonoxide gas that can build up todangerous levels in closed areas.Breathing carbon monoxide cancause unconsciousness or death.Never run this product's engine in aclosed, or even partly closed area.Before connecting an AC appliance or power cord to the generator: Use grounded 3-prong extension cords, tools, and appliances, ordouble-insulated tools and appliances. Inspect cords and plugs, and replace if damaged. Make sure that the appliance is in good working order. Faultyappliances or power cords can create a potential for electric shock. Make sure the electrical rating of the tool or appliance does notexceed the rated power of the generator or the receptacle beingused. Operate the generator at least 1 meter away from buildings andother equipment. Do not operate the generator in an enclosed structure. Do not place flammable objects close to the engine or locate thegenerator near flammable materials.22 Page 23 Friday, February 2, 2018 3:46 PMOPERATIONSTARTING THE ENGINETo prevent a possible fire, keep the generator at least 1 meter away frombuilding walls and other equipment during operation. Do not placeflammable objects close to the engine. Operating this generator less than 1 meter from a building or otherobstruction can cause overheating and damage the generator. For proper cooling, allow at least 1 meter of empty space above andaround the generator.Keep all cooling holes open and clear of debris, mud, water, etc.Cooling holes are located on the side panel, the control panel, andthe bottom of the generator. If the cooling holes are blocked, thegenerator may overheat and damage the engine, inverter, orwindings.Refer to SAFE OPERATING PRECAUTIONS on page 22 and perform theIS YOUR GENERATOR READY TO GO? checks (see page 20).Refer to the AC OPERATION (see page 28), AC PARALLEL OPERATION(see page 31) or DC OPERATION (see page 37) for connecting loads tothe generator.1. Make sure that all appliances are disconnected from the AC receptacle.2. Turn the fuel filler cap vent lever to the ON position.ONONFUEL FILLER CAP VENT LEVER23 Page 24 Friday, February 2, 2018 3:46 PMOPERATION3. Make sure the Eco Throttleswitch is in the OFF position, ormore time will be required forwarm-up.ECO THROTTLE SWITCHOFF4. To start a cold engine, movethe choke lever to the CLOSEDposition. To restart a warmengine, leave the choke lever inthe OPEN position.CHOKE LEVERCLOSED5. Turn the engine switch to theON position.ONENGINE SWITCH24 Page 25 Friday, February 2, 2018 3:46 PMOPERATION6. Pull the starter grip lightly untilyou feel resistance; then pullbriskly in the direction of thearrow as shown.Direction to pullDo not allow the starter grip tosnap back against thegenerator. Return it gently toprevent damage to the starter.STARTER GRIP7. If the choke lever was moved tothe CLOSED position to startthe engine, gradually move it tothe OPEN position as theengine warms up.CHOKE LEVEROPENECO THROTTLE SWITCH8. If you wish to use theEco Throttle system, turn theEco Throttle switch to the ONposition after the engine haswarmed up for 2 or 3 minutes.ON25 Page 26 Friday, February 2, 2018 3:46 PMOPERATIONSTOPPING THE ENGINETo stop the engine in an emergency, simply turn the engine switch tothe OFF position securely. Under normal conditions, use the followingprocedure.1. Turn off or disconnect all appliances that are connected to thegenerator.2. Turn the engine switch to the OFF position securely.FUEL OFFENGINE SWITCHOFFOperating the generator in the FUEL OFF position before turning theengine switch to the OFF position can reduce the fuel in thecarburetor. When using the FUEL OFF position, the generator will continue torun for several minutes until the fuel in the carburetor has beenconsumed, and then the engine will stop. Turn the engine switch to the OFF position after the engine stops. After stopping the engine using the FUEL OFF position, restartingthe engine will require additional pulls on the recoil starter.3. Allow the engine to cool, and then turn the fuel filler cap vent leverto the OFF position.OFFFUEL FILLER CAP VENT LEVER26OFF Page 27 Friday, February 2, 2018 3:46 PMOPERATION4. If two generators were connected for parallel operation, disconnectthe receptacle box for parallel operation after stopping the enginesif you do not wish to resume parallel operation.RECEPTACLE BOX FOR PARALLEL OPERATION(optional equipment)If the generator will not be used for a long period of time, refer topage 57 for information on Draining the Fuel Tank and Carburetor.27 Page 28 Friday, February 2, 2018 3:46 PMOPERATIONAC OPERATIONBefore connecting an appliance to the generator, make sure that it isin good working order and that its electrical rating does not exceedthat of the generator.Most motorized appliances require more than their electrical rating forstartup. When an electric motor is started, the overload indicator (red)may come ON. This is normal if the overload indicator (red) goes OFFwithin 4 seconds. If the overload indicator (red) stays ON, consult yourgenerator dealer.1. Start the engine (see page 23) and make sure the output indicator(green) comes ON.OVERLOAD INDICATOR(RED)OUTPUT INDICATOR(GREEN)28 Page 29 Friday, February 2, 2018 3:46 PMOPERATION2. Plug in the appliance into thereceptacle.PLUG3. Turn on the appliance.If the generator is overloaded (see page 30), or if there is a shortcircuit in a connected appliance, the overload indicator (red) will goON. The overload indicator (red) will stay ON, and after about fourseconds, current to the connected appliance(s) will shut off, and theoutput indicator (green) will go OFF. Stop the engine and investigatethe problem.Determine if the cause is a short circuit in a connected appliance or anoverload. Correct the problem and restart the generator.29 Page 30 Friday, February 2, 2018 3:46 PMOPERATIONAC ApplicationsBefore connecting an appliance or power cord to the generator: Make sure that it is in good working order. A faulty appliance orpower cord can create a potential for electrical shock. If an appliance begins to operate abnormally, becomes sluggish, orstops suddenly, turn it off immediately. Disconnect the appliance, anddetermine whether the problem is the appliance or the rate

your Honda servicing dealer is specially trained in servicing Honda generators. Your Honda servicing dealer is dedicated to your satisfaction and will be pleased to answer your questions and concerns. Best Wishes, Honda Motor Co., Ltd. Page 1 Friday, February 2, 2018 3:46 PM