INVERTER GENERATOR
USER'S MANUAL
R
GM4000iA
Portable Inverter Generator
1
UNPACKING
Always have assistance when lifting
the generator. The generator is heavy;
lifting it could cause bodily harm.
Avoid cutting on or near staples to
prevent personal injury.
Tools required - box cutter or similar device.
1. Carefully cut the packing tape on top of the carton.
2. Remove socket wrench, and oil funnel and save
for later.
3. Carefully cut two sides of the carton to remove the
generator.
DISCLAIMERS:
All information, illustrations and specifications in this manual are based on the latest information available at the
time of publishing. The illustrations used in this manual are intended as representative reference views only.
Moreover, because of our continuous product improvement policy, we may modify information, illustrations and/or
specifications to explain and/or exemplify a product, service or maintenance improvement. We reserve the right to
make any change at any time without notice. Some images may vary depending upon which model is shown.
ALL RIGHTS RESERVED:
No part of this publication may be reproduced or used in any form by any means - graphic, electronic or
mechanical, including photocopying, recording, taping or information storage and retrieval systems - without the
written permission of CHONGQING DINKING POWER MACHINERY CO., LTD
This manual contains important instructions for operating this inverter generator. For your
safety and the safety of others, be sure to read this manual thoroughly before operating the
generator. Failure to properly follow all instructions and precautions can cause you and others
to be seriously hurt or killed.
2
Spark Plug Socket Wrench
Used in spark plug maintenance,
inspection, and installation.
Phillips and slot blade
screwdriver used for generator
maintenance.
Dual-Purpose Screwdriver Funnel
It's used to oil the generator.
DESCRIPTION OF FITTINGS
Note: Actual tools may differ in appearance or design from image shown.
450ml 10W30 Oil
Be sure to add oil before starting
the generator.
3
LIMITED WARRANTY
Model Number: _____________________________________
Name: ___________________________________________
Serial Number: ______________________________________
Street Address: ___________________________________
Date Purchased: ____________________________________
Purchased From: ____________________________________
City, State, ZIP: ____________________________________
Country: __________________________________________
Phone Number: ___________________________________
E-Mail: ___________________________________________
WARRANTY CARD
R
4
TABLE OF CONTENTS
LIMITED WARRANTY
3
SAFETY WARNING
5
SAFETY INSTRUCTIONS
6
NAMES OF COMPONENTS
8
CONTROL FUNCTIONS
9
11
13
15
16
18
1.Generator Storage.....................................................................................................................23
2.Generator Transport..................................................................................................................24
3.Preparation for Use After Storage..............................................................................................24
TROUBLESHOOTING
25
TECHNICAL PARAMETERS
27
28
23
5
Failure to follow the instruction will result in being
in peril of your life or extremely serious injury.
Failure to follow the instruction will result in being
in peril of your life or very serious injury.
Failure to follow the instruction will result in minor
injury.
Failure to follow the instruction will result in the
damage to your generator set and other properties.
For portable generators where the neutral is floating, the operator's manual shall include the following wording or
equivalent:
The portable generator stator winding is isolated from the frame and from the AC receptacle ground pin; and
Electrical devices that require a connection between one conductor pin and the grounded receptacle pin may not
function properly.
CO TECHNICAL WARNING
6
Before operating the generator, it will help you avoid accidents to read and understand the Manual and
familiarize yourself with the safe operation procedures of the generator.
Please do not use indoors
Please do not use in humid
environment
Do not directly connect to the
household power supply system
Please do not smoke when refueling
Please do not spill when refueling
Please shut down the generator
before refueling
7
SAFETY LABELS AND DECALS
8
NAMES OF COMPONENTS
① Fuel Tank Cap: Open the fuel tank cap and fill with
proper amount of gasoline.
② Recoil Handle: Pull to start the engine.
③ Bolt: Remove left (right) outer cover.
④ Left Outer Cover
⑤ Control Panel: Contains the reset breaker, outlets
and warning lights.
⑥ Engine Cooling Vents: Helps move airflow in unit
to regulate engine temperatures.
⑦ Right Outer Cover: Unscrew the bolts to remove
the outer cover, add or replace the oil and maintain the
air filter.
⑧ Muffler: Avoid contact until the engine is cooled
down. The spark arrestor prevents sparks from exiting
the muffler. It must be removed for servicing.
⑨ Spark Plug Access Cover: Remove the cover to
service the spark plug.
⑩ Telescopic Rod
⑪ Wheel
⑫ Multi-Switch: Turn position to CHOKE to start the
engine, and turn to RUN position once the engine is
running. Switch to OFF to stop inverter.
3
4
2
1
10
5
6
8
9
3
11
7
12
9
CONTROL FUNCTIONS
CONTROL PANEL FEATURES GM4000iA
① Low Idle Switch: When turned to the ON position,
the engine will sense the load needed and run at a
slower RPM to save fuel.
② Reset: If the inverter is overloaded, the reset
breaker will trip. The engine will continue to run, but
there will be no output from the inverter. Unplug the
devices and reduce the load. Push in the reset breaker
to reset it.
③ USB Duplex: 5V DC, type-A and type-C connectors.
④ L120V AC 20A 5-20R Outlet: The outlet is capable
ofcarrying a maximum of 20 amps.
⑤ 120V AC 30A L5-30R Outlet: The outlet is capable
of carrying a maximum of 30 amps.
⑥ Parallel capability: Two GENMAX inverter
generators are connected together to provide dual
power to meet higher power requirements.
⑦ Ground Terminal: The ground terminal is used to
externally ground the inverter.
⑧ CO Alarm: Flashing red light: dangerous levels of
carbon monoxide gas have built up leave immediately
until area has aired out. Move generator to well-
ventilated area before operation. Flashing yellow light:
carbon monoxide sensor malfunction. Sensor needs
service.
10
CONTROL FUNCTIONS
AUTOMATIC ROTATING DIGITAL DISPLAY(scroll once every 5 s)
10
PREPARATIONS
Fuel
1
DANGER
• Fuel is flammable and toxic, please read the Safety Instruction carefully before refueling;
• Do not fuel too full, otherwise fuel will spill after fuel tank is warmed;
• After refueling, confirm that the fuel tank cap has been tightened.
ATTENTION
• After refueling, dry gasoline residue with a clean and soft cloth in time to avoid damaging plastic
enclosure;
• Unleaded gasoline must be used, as leaded gasoline can seriously damage internal parts of the
generator;
Remove fuel tank cap, and add gasoline to red horizontal indicating line oil level.
Fuel tank capacity: 1.6gal (6L)
Oil
2
No oil is filled into this generator when being delivered. Do not start up the generator without filling sufficient oil.
Please place the generator onto a horizontal plane surface;
1.
Loosen the knob on the right cover
counterclockwise and remove the right cover;
2.
Unscrew oil dipstick, Fill in 0.12gal(0.45L) oil
(SAE 10W/30 oil is recommended, of which
the grade is API standard Type SE or higher);
3.
Reinstall the right exterior cover and tighten the knob.
4.
12
PREPARATIONS
Pre-use Inspection
3
WARNING
Even if the generator is not in service, its important component may suddenly fails. Before the
generator is started up, if any of following components is unable to work properly, please inspect
and repair carefully.
Tip: The condition of the generator shall be inspected before using every time.
Pre-operation inspection
Project Possible Causes Probable Solutions
Fuel Check fuel level in fuel tank of the generator. Add fuel if necessary.
Oil
Check oil level of the generator. Add oil if necessary.
Check whether there is oil leaking.
Abnormal
conditions
during
operation
Check operating condition of the generator.
If there is any need, please do not hesitate to
consult your dealer.
13
1.
Press the LOW IDLE Switch to "OFF";
2.
Turn the Multi-Switch to "START";
Tip: When hot engine is started up, it is unnecessary to close the choke
valve, but turn the combination switch to "RUN".
3.
First gently pull startup handle, until guy cable is hooked tight, and then pull
it with effort;
Tip: When pulling the hand starter, hold generator carrying handle firm, to
prevent the generator from overturning.
5.
After the generator starts, turn the Multi-Switch to "RUN";
6.
Plug in after started.
7.
AT TENTION
For gasoline restarts with hot engine in hot ambient temperature >86°F (30°C): Rotate the Multi-Switch to the
“START” position for only one pull of the recoil cord. If generator does not start after first pull, rotate the Multi-
Switch to the “RUN” position for the next three pulls. Too much choke leads to spark plug fouling and engine
flooding. This will cause the engine not to start.
14
AT TENTION
For gasoline starting in standard ambient temperature >59°F(15°C): Keep Multi-Switch in “START” position for
three pulls of the recoil cord. If generator does not start after three pulls, rotate the Multi-Switch to the “RUN”
position for the next three pulls. Too much choke leads to spark plug fouling and engine flooding. This will cause
the engine not to start.
AT TENTION
For gasoline starting in cold ambient temperature < 59°F (15°C): Keep the Multi-Switch in the “START”
position until engine starts. As soon as the engine starts and runs smoothly turn the Multi-Switch to the “RUN”
position. In extreme cold temperatures, this may take several seconds.
AT TENTION
If the engine starts but does not continue to run make certain that the generator is on a flat, level surface. The
engine is equipped with a low oil sensor that will prevent the engine from running when the oil level falls below a
critical threshold.
Parallel Operation
The parallel connection ports allow you to connect two generators to increase the total available electrical power.
Follow the instructions included with your parallel connection kit for proper installation and operation.
Overload Indicator
Note: The OVERLOAD light may turn on for a few seconds as a large device starts. This is normal for loads
approaching the capacity of this generator.
1. The total combined load through the outlets on the generator must not exceed the running power of the unit.
2. If the OVERLOAD light turns on and the generator stops producing power, it has been overloaded.
3. Turn off and disconnect all electrical devices and stop the engine. Compare device requirements to generator
rating and reduce the total wattage of connected devices if necessary. Move anything that may be limiting
generator ventilation away.
4. Check if any circuit breakers have tripped and make sure that ALL circuit breakers are reset before starting the
generator again.
5. Restart the engine and reconnect devices while being careful to not overload the generator.
Low Oil Indicator
1. If the engine oil level is too low, the LOW OIL light turns on and the engine will automatically shut off.
2. The engine cannot be restarted until the proper amount of oil has been added. Add the appropriate type of oil
until the oil level is at the proper level. SAE 10W-30 oil is recommended for general use.
Do not run the engine with too little oil. Engine will shut off if engine oil level is too low.
Low Idle
1. Turn on a Low Idle Switch to limit noise and fuel consumption with a light generator load.
2. Turn off the low idle mode to run the engine at full speed under the following conditions:
● Starting the generator.
● If the load exceeds 50%, it is recommended to turn off the low idle mode.
AT TENTION
15
Turn off and unplug all connected electrical loads. Never start or stop the generator with electrical
devices plugged in or turned on.
1.
Turn the Multi-Switch to "STOP".
2.
Remove or consume all untreated gasoline if you plan to store the generator longer than 3 months.
3.
16
Service Environment of the Generator
1
• Applicable temperature: 23℉~104℉ (-5°C~ 40°C);
• Applicable humidity: below 95%;
• Applicable altitude: regions below 1,500 m (It shall be used by reducing power in regions above 1,000 m).
Standard atmospheric condition
• Ambient temperature Tr: 298k (77℉/25°C)
• Relative air humidity Фr: 30%
• Absolute atmospheric pressure Pr: 100kPa
When actual environmental condition is inconsistent with the condition of output power of the generator
set:
• Every 41℉(5°C) of increase in ambient temperature will reduce the power of generator by about 2%.
• Every 30% of increase in relative humidity of air will reduce the power of generator by about 1.5%.
• Every 300 m rising of ASL will reduce the power the generator by about 4.5%.
Generator Wiring
2
• When the generator is connected to household power source as a backup power supply, the connection shall be
carried out by a professional electrician or a person familiar with electricity.
• After connecting the load to the generator, check carefully whether electrical connection is safe and reliable.
Improper electrical connection may cause generator damage, burning or fire.
• Avoid connecting this generator to commercial power outlet.
• When extending the cable, be sure not to exceed its length.
① 60m cross-section area is 1.5mm²
② 100m cross-section area is 2.5mm²
• The appearance of extension cable shall be protected by a layer of tough and elastic rubber cover (IEC25) or
other substitutes.
OK
OK
17
Connection of AC power
WARNING
All electrical equipment shall be disconnected before inserting the plug.
ATTENTION
• Make sure that all electrical equipment, including wires and plugs, are in good condition before
connecting to the generator;
• Make sure that all loads driven by the generator are within rated load range;
• Make sure that load current is within rated current range of rated socket.
Tip: Make sure that the generator set is grounded, and if electrical equipment requires
grounding, the generator set must be grounded.
① Start up the engine;
② Turn energy-saving switch to "ON";
③ Insert the plug into AC outlet;
④ Make sure that AC indicator is lit up;
⑤ Switch on electrical equipment.
Tip: Before increasing engine speed, energy-
saving switch must be switched to "OFF". If the
generator set supplies power to multi loads or
electrical equipment, start from large to small
according to the size of each electrical
equipment.
Generator Grounding
3
① Please use grounding wire with sufficient electrical energy capacity;
② Connect one end of grounding wire reliable to grounding bolt on control panel
of the generator set;
③ Insert grounding body (iron rod with a diameter of 5 ~ 10mm) 200mm below
into the earth and lead it out with conductor;
④ Connect the other end of the grounding wire reliable to the led wire of
grounding body.
In order to prevent any damage to the generator caused by electric shock or improper electrical application, it is
recommended that the generator is grounded with good conductor with insulating sheath.
18
Good maintenance and service is the best guarantee for safe, economical and zero-failure operation. It also
contributes to environmental protection.
In order to keep the generator in good condition, you must inspect and maintain it regularly. The maintenance
schedule is as follows:
Maintenance cycle
Item
Each
First in 1 month
or 20 hours
Then every three
months or every
50 hours
100 hours per
year or use
Engine oil
Gearbox gear
Oil (if any)
Air cleaner
element
Settling cup (if any)
Spark plug
Spark eliminator
Idle speed
(if any)**
Fuel tank and
fuel filter***
Fuel line
Cylinder head,
piston
Displacement < 225cc, every 125 hours; displacement
capacity ≥ 225cc, every 250 hours.
Check-fill
Replace
Replace
Check oil
Inspection
Clean
Replace
Clean
Clean-adjust
Clean
Check-adjust
Check-adjust
Clean
Inspection
Remove
carbon
deposit**
Every two years (Please replace if necessary)
√
√ √
√
√ √
√
√
√
√
√*
√
√
√
√
* heseT items shall be replaced if necessary;
** heT se items shall be maintained by the dealer authorized by the Company, unless the
user has proper tools and maintenance ability.
ATTENTION
• If it often works under high temperature or high load, oil shall be changed every 25 hours;
• If it often works in dusty or harsh environment, air cleaner element shall be cleaned every 10 hours. If
necessary, the air cleaner element shall be replaced every 25 hours;
• It shall be maintained on spot-inspection cycle and time, whichever is earlier;
• If maintenance cycle time has elapsed, perform the maintenance as soon as possible as per the table
above.
19
WARNING
Please shut down the engine first before performing any maintenance. The engine shall be placed in a
horizontal position. In order to prevent the engine from starting up, separate spark plug cap shall be
separated from spark plug.
Do not use it indoors or use it in a tunnel, cave or other places ventilated poorly. Make sure that work area
is well ventilated. Exhaust gas from the engine contains toxic gases, carbon oxides, and the inhalation can
cause shock, loss of consciousness, and even death.
Spark Plug Inspection
1
Spark plug is an important part of the generator, which must be inspected regularly.
Remove decorative cover and spark plug cap of
the generator;
1.
Insert the screwdriver into the sleeve, to screw it
counterclockwise, and then remove the spark
plug;
2.
Check whether there is discoloration, and remove carbon deposits.Check
whether there is little pale to moderate brown on ceramic cores around
center electrode of the spark plug;
3.
Check the model of spark plug and clearance.
Spark plug gap: 0.7-0.8mm
Standard spark:
4.
Tip: The spark plug clearance is required to be measured by line thickness gauge, which shall be adjusted if
necessary.
BRANDBRAND MODEL
NGK
C7HSA
CR6HSA
TORCH A5RTC
0.7~0.8mm
20
Install the spark plugs in reverse order of removal.
Spark plug torque: 14±1N.m(123.9±8.8in-lb)
5.
Tip: If there is no torque wrench when installing the spark plug, a better estimation method is to screw it 1/4-1/2
turns by force after screwing it in place, but the spark plug shall be screwed to specified torque as soon as possible.
Adjustment of the Carburetor
2
The carburetor is an important components of the engine. The adjustment shall be carried out by a dealer with
professional knowledge, professional data and equipment, to ensure that the adjustment is proper.
Replacement of Oil
3
WARNING
Do not drain the oil immediately after turning off the generator. Oil temperature is very high, when
operating, take care to avoid scalding.
Put the generator on a horizontal plane, start the generator, run it for a few minutes to make it warm, then
turn off the engine.
1.
2.
Unscrew oil dipstick.
3.
Loosen the knob on the right cover
counterclockwise and remove the right cover;
21
Place an oil pan under the engine, tilt the generator to quickly pour out oil;
After discharging the oil, put the generator back on level ground.
4.
Don't go over the scale
Refill oil to a proper level, tighten oil dipstick,
cover external cover plate and tighten the knob.
5.
Air Filter
4
Dirty air cleaner may prevent air from flowing into the carburetor. In order to prevent failure of the carburetor,
please maintain air cleaner regularly. If being used in a dusty environment, it shall be maintained frequently.
1.
Remove screws , to remove cover plate of air
cleaner.
2.
Clean foam cleaner element with cleaning solvent and blow it dry, Put a few
drops of oil on the filter element.
3.
ATTENTION
Be sure not to twist the foam cleaner element forcibly to avoid damage.
Put foam cleaner element into air cleaner;
Tip: Make sure that the surface of foam cleaner element is in close contact
with air cleaner, and there shall be no gap leaking air. Be sure not to start the
engine before air cleaner is assembled, because it will generate excessive
toxic gas and wear the cylinder.
4.
Loosen the knob on the right cover
counterclockwise and remove the right cover.
22
1. Reassemble empty air cleaner cap back to
original position, and tighten screws.
2. Assemble right exterior cover and tighten knob.
5.
Fuel Filter Screen
5
WARNING
Be sure not to open fuel tank of the generator in a place where smoking or with flame.
1. Remove fuel tank cap and fuel tank filter screen.
2. Clean fuel tank filter screen with gasoline.
3. Wipe filter screen dry, and put it back into fuel tank.
4. Reassemble fuel tank cap.
Be sure to screw fuel tank cap tight.
ATTENTION
23
Generator Storage
1
If it is stored long-term, in order to prevent aging, you shall take some storage measures.
Shut down generator.
1.
Open fuel tank cap, to take out fuel filter screen.
Pump all fuel in fuel tank into special fuel tank,
and then reassemble fuel tank cap back.
2.
Start up the engine to burn off fuel in the carburetor, and then shut it down.
3.
Tip: Do not connect any electrical equipment. Running time of the engine depends on remaining fuel in the fuel
tank.
Open the generator right exterior cover and enter the carburetor. Locate the
clear plastic hose from the carburetor and place a suitable container under it
to capture the drained fuel.
4.
Loosen the carburetor drain screws until you
see fuel draining from the carburetor.
5.
Allow fuel to drain into the container and tighten the drain screws on the
carburetor. Install the engine service panel.
6.
Unscrew oil dipstick, and drain oil in the crankcase off. Fill new oil to upper oil limit, and then assemble
oil dipstick.
7.
24
Gently pull startup handle until you feel resistance, allowing both inlet valve
and exhaust valve to be closed.
8.
Place the generator set in a clean and dry area.
9.
Generator transport
2
• When the generator set is transported, it shall be ensured that there is no fuel spilling;
• Do not fill excessive fuel into fuel tank;
• Do not run the generator, and avoid direct sunlight;
• Do not transport the generator set on rough road for long time.
1. Slowly pull the starter cord a few times to clean oil from the cylinder or to eject any pump protector from the
pump which may have been added prior to storage.
2. Remove the spark plug from the cylinder. Wipe oil from the spark plug and return it to the cylinder and re-
tighten.
3. Reconnect the spark plug wire.
4. Refuel engine per earlier instructions in this manual.
Preparation for Use After Storage
3
25
TROUBLESHOOTING
26
TROUBLESHOOTING
27
TECHNICAL PARAMETERS
Item
Engine Model
Displacement (cc)
Gas Distribution Mode
Cooling Mode
Rated Speed (RPM)
Starting Method
Fuel Tank Volume (gal)
Lubricating Oil Capacity (gal)
Lubricating Oil Model
Forced cooling wind
Vehicle-use unleaded gasoline
Noise dB (at 7m)(25% load)
Rated Power (kW)
Max. Power (kW)
Rated Voltage (V)
Rated Frequency (Hz)
Rated Power Factor
Phase Number
Overall Dimension (in.)
Net Weight (lb.)
Stroke x Bore (mm)
THD
Input valve：0.03~0.08mm, Output valve：0.03~0.08mm
GM4000iA
164F/P
145
OHV
4850
Recoil Start
SAE 10W-30
62
3.2
4.0
120
60
1
Single phase
65x45
4-stroke
≤3%
1.6 (6L)
0.12 (0.45L)
55.6 (25kg)
20.9×12.2×19.7 (530×310×500mm)
28
R
CHOOSING
A GENERATOR
1
29
Phone
866-960-2920
E-mail
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ADD: 301 Doubleday Ave Ontario CA 91761
