GENMAX GM1200i User manual

WARNING: SAVE THIS MANUAL FOR FUTURE REFERENCE
INVERTER GENERATOR
USER'S MANUAL
RGENMAX GENERATOR
GM1200i Portable Inverter Generator
1000 Running Watts | 1200 Peak Watts
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, oil and 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)
Parallel Cord (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
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 durat ion of the warranty period.
6. WHAT IS NOT COVERED UNDER THIS WARRANTY:
A. Transportation changes for s ending 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 norne 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

3
TABLE OF CONTENTS
LIMITED WARRANTY 2
SAFETY WARNING 4
SAFETY INSTRUCTIONS 5
NAMES OF COMPONENTS 7
CONTROL FUNCTIONS 8
PREPARATIONS 9
1.Fuel............................................................................................................................................9
2.Oil...............................................................................................................................................9
3.Pre-operation inspection............................................................................................................10
STARTING UP THE GENERATOR 11
SHUTTING DOWN THE GENERATOR 12
USING THE GENERATOR 13
1.Service environment of the generator.......................................................................................13
2.Generator wiring........................................................................................................................13
3.Generator grounding.................................................................................................................14
SERVICE AND MAINTENANCE 15
1.Spark plug inspection...............................................................................................................16
2.Adjustment of the carburetor.....................................................................................................17
3.Replacement of oil....................................................................................................................17
4.Air filter......................................................................................................................................18
5.Fuel filter screen........................................................................................................................19
STORAGE AND TRANSPORT 20
1.Generator storage.....................................................................................................................20
2.Generator transport...................................................................................................................21
TROUBLESHOOTING 22
TECHNICAL PARAMETERS 23
CIRCUIT DIAGRAM 24
CHOOSING A GENERATOR 26

4
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

5
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

6
SAFETY INSTRUCTIONS
SAFETY LABELS AND DECALS

7
NAMES OF COMPONENTS
Lifting handle
Knob
Fuel tank cap
Control panel
Start handle
Left enclosure
Spark plug cover
plate
Muffler
Oil cover plate
Right enclosure
Air filter cover plate

8
CONTROL FUNCTIONS
① 120-Volt, 20-Amp Duplex Outlet (NEMA 5-20R):
The outlet is capable of carrying a maximum of 20
amps.
② USB Duplex: 5V DC that come in 1 amps and2.1
amps.
③ Reset Breaker: 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.
④ Efficiency Mode Switch: When turned to the ON
position, the engine will sense the load needed and
run at a slower RPM to save fuel.
⑤ Ground Terminal: The ground terminal is used to
externally ground the inverter.
⑥ Low Oil Alarm: Indicates low oil level.
⑦ Overload Alarm: Indicates that the inverter is
overloaded.
⑧ Output Indicator: Indicates the inverter is ready to
be used.
⑨ Engine Switch: Press ON to start the engine,
press OFF to turn OFF the engine.
⑩ AC Breaker: If the inverter is overloaded, the reset
breaker will trip to block current.
CONTROL PANEL FEATURES GM1200i
10
12
11
⑪ Parallel Connectors: 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. The special paralleling cords shall be
purchase separately, and they shall be approved by
certification body.
⑫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.

9
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: 0.7gal
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.
Turn the knob to ON and remove the oil maintenance cover.
2.
Unscrew oil dipstick, Fill in 0.1gal oil (SAE
10W/30 oil is recommended, of which the
grade is API standard Type SE or higher);
3.
Don't go over the scale
Reassemble oil cover plate and tighten the knob.
4.

10
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
Fuel
• Check fuel level in fuel tank of the generator, and fuel it if necessary.
Oil
• Check oil level of the generator, and fill 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.

11
STARTING UP THE GENERATOR
Remove the load from all output ends;
1.
Turn ventilation knob of fuel tank cap to "ON";
2.
Move lever to "START" position;
Tip: When hot engine is started up, it is unnecessary to close the choke
valve.
6.
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.
7.
Turn fuel switch to "ON" position;
3.
Press ECO switch to "OFF";
4.
Press ENG switch to "ON";
5.

12
SHUTTING DOWN THE GENERATOR
Press ENG switch to "OFF" position;
2.
After the generator has completely cooled down, turn ventilation knob on fuel
tank cap to "OFF".
4.
Unplug the power cord;
1.
After the start, move lever to "RUN" position;
8.
Turn fuel switch to "ON" position;
3.
Plug in after started.
9.

13
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

14
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.

15
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.

16
SERVICE AND MAINTENANCE
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.
Standard spark: A5RTC
Spark plug gap: 0.7-0.8mm
4.
0.7~0.8mm
Tip: The spark plug clearance is required to be measured by line thickness gauge, which shall be adjusted if
necessary.

17
SERVICE AND MAINTENANCE
Install the spark plugs in reverse order of removal.
Spark cold torque: 12.5 N.m
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 surface, start the generator, run it for a few minutes to increase its
temperature, and then turn off the engine;
1.
Turn the knob to “ON” and remove the oil maintenance cover.
2.
Unscrew oil dipstick.
3.

18
SERVICE AND MAINTENANCE
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.
Refill oil to a proper level, tighten oil dipstick,
cover external cover plate and tighten the knob.
5.
Don't go over the scale
Recommended oil: SAE S10W/30
Oil grade: API standard Model SJ or higher
Volume: 0.1gal
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.
Remove the cover of the air filter;
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.

19
SERVICE AND MAINTENANCE
1. Reassemble empty air cleaner cap back to original position, and tighten
screws.
2. Assemble air cleaner cover and tighten the 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