GENMAX GM4000iSBEPC User manual

GM4000iSBEPC Portable Inverter Generator
3200 Running Watts | 4000 Peak Watts
INVERTER GENERATOR
USER'S MANUAL
RGENMAX GENERATOR
WARNING: SAVE THIS MANUAL FOR FUTURE REFERENCE
This manual contains important information regarding safety. Operation,
maintenance and storage of this product. Before use, read carefully and
understand all cautions, warnings, instructions and product labels. Failure to do
so could result in serious personal injury and/or property damage.

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.
WHAT COMES IN THE BOX
Spark Plug Socket Wrench (1)
Dual-Purpose Screwdriver (1)
User Manual (1)
Warranty Information (1)
Funnel (1)
30A 120V L14-30P to TT-30R Plug Adapter (1)
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
30A 120V L5-30P to TT-30R
Plug Adapter
Change the 30A 120V L5-30R
socket to the TT-30R socket.
Note: Actual tools may differ in appearance or design from image shown.

3
LIMITED WARRANTY
1. DURATION : One (1) year from the date of purchase by the original purchaser ( retail customer ) on products used
solely for consumer applications; if a product is used for business, commercial, or industrial applications, the warranty
per iod will be limited to ninety (90) days from the date of purchase.
2. WHO GIVES THIS WARRANTY (WARRANTOR):
CHONGQING DINKING POWER MACHINERY CO., LTD
3. WHO RECEIVES THIS WARRANTY(PURCHASER):The original purchaser (other than for purposes of resale) of
the Genmax's inverter.
4. WHAT PRODUCTS ARE COVERED BY THIS WARRANTY: Any portable generator supplied or manufactured by
Warrantor.
5. WHAT IS COVERED UNDER THIS WARRANTY: Substantial defects on material and workmanship which occur
within the duration of the warranty period.
6. WHAT IS NOT COVERED UNDER THIS WARRANTY:
A. Transportation changes for sending the product to Warrantor or its authorized service representative for warranty
service, or for shipping repaired or replacement products back to the customer; these charges must be borne by the
customer.
B. Damages caused by abuse, accident, shipping, misuse, overloading, modification, and the effects of corrosion,
erosion and normal wear and tear.
C. Warranty is voided if the customer fails to install, maintain and operate the product in accordance with the
instructions and recommendations set forth in the owner's manual(s), or if the product is used as rental equipment.
D. Pre-delivery service, i.e. assembly, oil or lubricants, and adjustment.
E. Items or service that are normally required to maintain the product, i.e. lubricants and filters.
F. Warrantor will not pay for repairs or adjustments to the product, or for any costs or labour, performed without
Warrantor's prior authorization.
EXCLUSIONS AND LIMITATIONS: Warrantor makes no other warranty of any kind, express or implied. Implied
warranties, including warranties of merchantability and of fitness for a particular purpose, are hereby disclaimed. This
warranty service described above is the exclusive remedy under this warranty; liability for incidental and consequential
damages is excluded to the extent permitted by law.
7. RESPONSIBILITIES OF PURCHASER UNDER THIS WARRANTY:
A. The purchaser must provide dated proof of purchase and must notify Warrantor within the warranty period.
B. Deliver or ship the serviced generator or component to the nearest Warrantor's authorized service representative.
Freight costs, if any, must be borne by the purchaser.
8. HAVE QUESTIONS?
Email: [e-mail] Phone: [phone]
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
PREPARATIONS 11
1.Fuel............................................................................................................................................11
2.Oil...............................................................................................................................................11
3.Pre-operation inspection............................................................................................................12
STARTING UP THE GENERATOR 13
SHUTTING DOWN THE GENERATOR 14
USING THE GENERATOR 15
1.Service environment of the generator.......................................................................................15
2.Generator wiring........................................................................................................................15
3.Generator grounding.................................................................................................................16
4.Battery Charging.......................................................................................................................17
5.Parallel operation......................................................................................................................18
SERVICE AND MAINTENANCE 19
1.Spark plug inspection...............................................................................................................20
2.Adjustment of the carburetor.....................................................................................................21
3.Replacement of oil....................................................................................................................21
4.Air filter......................................................................................................................................22
5.Fuel filter screen........................................................................................................................23
STORAGE AND TRANSPORT 24
1.Generator storage.....................................................................................................................24
2.Generator transport...................................................................................................................25
TROUBLESHOOTING 26
TECHNICAL PARAMETERS 28
CIRCUIT DIAGRAM 29
CHOOSING A GENERATOR 30

5
SAFETY WARNING
Personal and property safeties of you and others are very vital. Please read the Safety
Warning in the User's Manual and the decals of the generator set carefully.The Safety
Warning can alert you to those potential hazards that could harm you and others. In front
of each Safety Warning, there is one of four words "DANGER" "WARNING",
"ATTENTION", and "CAREFUL". Details are as follows:
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.
NEUTRAL FLOATING
CO DETECT technology monitors the accumulation of carbon monoxide (CO), a poisonous gas produced by
engine exhaust when the generator is running. If CO Sensor detects unsafe elevated levels of CO gas, it
automatically shuts off the engine. CO Sensor is not a substitute for an indoor carbon monoxide alarm or for safe
operation. DO NOT allow engine exhaust fumes to enter a confined area through windows, doors, vents or other
openings. Generators must ALWAYS be used outdoors, far away from occupied buildings with engine exhaust
pointed away from people and buildings. Meets the requirements of ANSI/PGMA G300-2018.
CO TECHNICAL WARNING

6
SAFETY INSTRUCTIONS
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
Please do not connect it to
household appliances directly Please do not smoke when refueling
Please do not spill when refueling
Please shut down the generator
before refueling

7
SAFETY INSTRUCTIONS
SAFETY LABELS AND DECALS
6
6

8
NAMES OF COMPONENTS
1
2
3
4
9
10
3
7
8
6
5
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 Magnetic Oil Dipstick: absorb iron filings in the oil,
it is recommended to screw down the magnetic oil
dipstick and clean it every 50 hours.

9
CONTROL FUNCTIONS
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 One Push Start: Press this button, the engine can
start and stop.
③ 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.
④ AC Protector: If the generator is overload, the AC
protector will trip to block current.
⑤ Fuel Switch: Switch to ON to turn ON the fuel,
switch to OFF to turn OFF the fuel.
⑥ 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.
⑦ DC Cigarette Lighter Outlet: 12V DC 8.3A.
⑧ Parallel Connectors: To increase AC power output,
the connector sockets are used to connect the two
same type generators with special parallel kit
GM6000SPK sold by GENMAX. The connector sockets
is only used to connect two inverter generators. They
can not used for AC power output. The special
paralleling kit GM6000SPK shall be purchased
separately, and they shall be approved by certification
body.
⑨ Parallel Connectors (240V OUTPUT): When using
parallel kits, two 120V generators can output 240V by
connecting this interface.
⑩ 120V AC 30A L5-30R Outlet: The outlet is capable
of carrying a maximum of 30 amps.
⑪120V AC 20A 5-20R Outlet: The outlet is capable of
carrying a maximum of 20 amps.
⑫Ground Terminal: The ground terminal is used to
externally ground the inverter.
⑬ DC Protector: If the generator is overload, the DC
protector will trip to block current.
CONTROL PANEL FEATURES GM4000iSBEPC
10 11
12
13

10
CONTROL FUNCTIONS
① OVERLOAD: Red light means the machine
overload.
② POWER: Indicates the inverter is ready to be used.
③ LOW OIL: Yellow light means the amount of oil is
too low.
④ POWER OUTPUT: Output power percentage
display.
⑤ GASOLINE FUEL METER: Gasoline fuel level
display.
⑥ VOLTAGE: Voltage display.
⑦ FREQUENCY: Frequency display.
⑧ TIME: Represents total operation time of the
generator.
AUTOMATIC ROTATING DIGITAL DISPLAY(scroll once every 3 s)
DIGITAL DISPLAY CENTER

11
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: 0.9gal (3.6L)
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 bolt 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.
Reassemble the right cover and tighten the bolts.
4.
Don't go over the scale

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.
Battery Check whether the battery is full. See the “Battery Charging” page.

13
STARTING UP THE GENERATOR
Remove the load from all output ends;
1.
Switch low idle switch to "OFF";
4.
Connect battery line before first use:
1. Loosen the bolt on the right cover and remove the cover;
2. Connect the positive and negative electrodes of the battery.
Tip: Connect the same color wires together, do not connect the wrong
positive and negative wires.
2.
Turn the fuel switch to "ON";
3.
Select Boot Mode:
a. Hand Starting: Pull the starting handle to start the generator.
b. One Button to Start: Press the one-click start button to start the generator.
Tip: If the green light keeps flashing fast, the generator does not start successfully. Press the button
to turn off the green light, and press the button again to start the generator.
5.
Plug in after started.
6.
ab

14
SHUTTING DOWN THE GENERATOR
Press the one-click start button to turn off the generator;
2.
Unplug the power cord;
1.
Turn the fuel switch to "OFF" position;
2.

15
USING THE GENERATOR
Service environment of the generator
1
• Applicable temperature: -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 (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 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

16
USING THE GENERATOR
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.
Tip: How to change the grounding method please refer to the website: https://www.genmaxpower.com/page/faq

17
USING THE GENERATOR
Battery Charging
4
Loosen the bolt on the right cover and remove
the cover;
1.
Connect the dedicated charger to the battery
cable and charge the battery from the external
power supply..
Tip: The charging time is about 30-40 minutes.
2.
The battery storage time is generally about 6 months. If the generator is not used for a long time, the battery
will run out of power. At this time, the battery should be charged. Replace the battery if it is damaged or fails to
charge.
Hand start charging: Start the generator by hand, and the battery will be charged automatically when the
generator runs.
Use an external power source for charging:
WARNING
Do not start the generator while charging with an external power supply. Keep batteries away
from fire sources. Keep the battery in a cool and dry place, away from direct sunlight. Keep batteries
away from children.
ATTENTION
1. Charge properly
Keeping lithium-ion batteries properly charged and discharged can prolong battery life. Maintaining a power
level of 10%-90% in lithium-ion batteries is beneficial for battery protection.
2. Choose the appropriate charging temperature
Lithium battery charging temperature range: 0-45℃.
3. Avoid overcharging
Overcharging of lithium-ion batteries must be avoided during the charging process. Overcharging of lithium-
ion batteries in any form will lead to serious damage to battery performance and even explosion.

18
USING THE GENERATOR
Parallel operation
5
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.
WARNING
TO PREVENT SERIOUS INJURY, DEATH, AND GENERATOR AND/OR EQUIPMENT DAMAGE FROM ELECTRIC SHOCK AND
FIRE:
1. Follow Parallel Kit instructions provided with Kit for connection and use of a Parallel Kit.
2. Only connect two identical Inverter Generators together using a Parallel Kit.
3. Connect Parallel Kit only to terminals marked "Parallel Outlets" on the front of the Generator.
4. Do not remove or connect a Parallel Kit while the Generator is running.
5. Do not use a Parallel Kit that is attached to only one Generator.
Connectors (Red)
Connectors (Red)
Ground Connectors (Ring)
Connectors (Black)
Ground Connectors (Ring)
120/240V Connector
Connectors (Black)
Parallel Connectors (120V OUTPUT): To increase AC power output,
the connector sockets are used to connect the two same type
generator with special paralleling cords. The connector sockets is
only used to the communication between the inverters, they can not
used for AC power output.
Parallel Connectors (240V OUTPUT): When using parallel kits, two
120V generators can output 240V by connecting this interface.

19
SERVICE AND MAINTENANCE
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)**
Valve clearance**
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 yeara (Please replace if ecessary)
√
√ √
√
√ √
√
√
√
√
√*
√
√
√
√
* 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.