youli MIG-160PI User manual

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 1 -
USER'S MANUAL
MODEL：

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 2 -
Safety Caution！
On the process of welding, there will be any possibility of injury, so
please take protection into consideration during operation. More
details please review the Operator Safety Guide, which complies with
the preventive requirements of the manufacturer
Electric shock——may lead to death ！！
·Set the earth fitting according to applying standard.
·It is forbidden to touch the electric parts and electrode when the skin is naked,
wearing wet gloves or clothes.
·Make sure you are insulated from the ground and the workshop.
·Make sure you are in safe position.
Gas——may be harmful to health!
·Keep your head out of the gas.
·When arc welding, air extractor should be used to prevent from breathing gas.
Arc radiation——Harmful to your eye and burn your skin.
·Use suitable helmet and light filter, wear protective garment to protect eye and
body.
·Use suitable helmet or curtain to protect looker-on.
Fire
·Welding spark may cause fire, make sure the welding area no tinder around.
Noise——extreme noise harmful to ear.
·Use ear protector or others means to protect ear.
·Warn that noise harmful to hearing if looker-on around.
Malfunction——When trouble, count on the professionals
·If trouble in installation and operation, please follow this manual instruction to
check up.
·If fail to fully understand the manual, or fail to solve the problem with the
instruction, you should contact the suppliers or our service center for
professional help.

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 3 -
About the machine
The welding machine is a rectifier adopting the most advanced inverter
technology.
The development of inverter gas-shielded welding equipment profits from the
development of the inverter power supply theory and components. Inverter
gas-shielded welding power source utilizes high-power component IGBT to transfer
50/60HZ frequency up to 100KHZ, then reduce the voltage and commutate, and
output high-power voltage via PWM technology. Because of the great reduce of the
main transformer’s weight and volume; the efficiency increases by 30%. The
appearance of inverter welding equipment is considered to be a revolution for welding
industry.
CO2 shielded welding equipment adopts the most advanced inverter technology
by our. Inside of the machine is equipped with electronic reactor circuit which can
accurately control the process of the electric short transition and blending transition
and result excellent welding characteristic. Comparing with synergic welding machine
and other machine, it has the following advantages: stable wire speed, compact,
power saving, no electromagnetic noise. Continuous and stable operation with small
current, especially suitable for welding sheet of low-carbon steel, alloyed steel and
stainless steel. Automatic voltage pulsation compensation capability, small sparkle,
good arcing, uniform welding pool, high duty cycle and so on.
Thanks for purchasing product and hope for your precious advice. We will
dedicate to produce the best products and offer the best service.
CAUTION！
The machine is mainly used in industry. It will produce radio wave, so the
worker should make fully preparation for protection.

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 4 -
PARAMETERS
Model
MIG-160PI
MIG-180PI
MIG-200PI
MIG-250PI
Power Vol.（V）
1 phase
220V15%
1 phase
220V15%
1 phase
220V15%
1 phase
220V15%
Frequency（HZ）
50/60
50/60
50/60
50/60
Rated input current（A）
20.2
23.8
27.6
38
Output current （A）
50-160
50-180
50-200
50-250
Output Vol. (V)
16.5-22
16.5-23
16.5-24
16.5-26．5
Duty cycle（%）
60
60
60
60
Power factor
0.93
0.93
0.93
0.93
Efficiency（%）
85
85
85
85
Wire machine
Compact
Compact
Compact
Compact
Wire speed（m / min）
2.5-13
2.5-13
2.5-13
2.5-13
Post puff （S）
1
1
1
1
wire wheel diamete
（mm）
150
150
150
150
Wire diameter（mm）
0.8/1.0
0.8/1.0
0.8/1.0
0.8/1.0
Housing shielding grade
IP21
IP21
IP21
IP21
Insulation grade
F
F
F
F
suitable thickness(mm）
0.8above
0.8above
0.8above
0.8above
Weight （kg）
18
18
19
19
Dimension (mm)
540×255×415
540×255×415
540×255×415
540×255×415

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 5 -
Installment
The welding equipment is equipped with power voltage compensation set. When
power voltage changes between±15% of rated voltage, it still works normally.
When using long cable, in order to minimize the reduce of voltage, big section
cable is suggested. If the cable is too long, it will affect the performance of arcing and
other system function, so stated length is suggested.
1、Make sure the intake of the machine is not covered or blocked to prevent the
malfunction of the cooling system.
2、Use earth cable that the section no less than 6mm2to connect the housing and earth,
the method is from the connection in the back of the machine to the earth set, or
make sure the earth end of power switch reaches the earth. Both ways can be
used for better security.
Installment：
1) Connect the gas flask with CO2 decompression flow meter and the CO2 mouth
behind the machine via gas cable.
2) Insert the swift plug of earth cable into the swift socket in the front panel.
3) Set the wire wheel with wire on the wheel axis, the wheel hole should be matched
with the wheel fixer.
4) Choose wire slot according to wire size.
5) Loosen the screw of wire-pressing wheel, put the wire into slot via wire-lead tube,
tune the Wire-pressing wheel to fix wire from gliding,but pressure should be suitable
in case the wire distorts and affects wire sending.
6) Wire roll should turn clockwise rotation to let out wire, to prevent wire from
gliding, wire is usually set to the fixed hole on the wheel side. To prevent the bent
wire from getting stuck, please cut off this part of the wire.
7) The MIG torch has been setted inside of the machine just need put the wire into the
torch by hand.

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 6 -
Operation
1、Put the air switch to “ON” position, open the valve of CO2 cylinder and adjust
the flow.
2、Adjust the wire diameter of the wire machine to rated number according to wire
diameter.
3、Choose torch loophole span based on wire diameter.
4、Tune the voltage knob,speed knob and inductance knob to the right position
based on the thickness of the work piece and mechanics.
5、Press the torch switch to let out the wire to the torch head and begin to work.

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 7 -
Front panel sketch：
MMA-160PI
The panel picture above is for reference only
. If any difference with the real machine, please follow with the real machine.
NOTES OR PREVENTIVE MEASURES
1、Environment
1）The machine can perform in environment where conditions are dry with a
dampness lever of max 90%.
2）Ambient temperature is between 10 to 40 degrees centigrade.
3）Avoid welding in sunshine or dripaings.

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 8 -
4）Do not use the machine in environment where condition is polluted with
conductive dust on the air or corrosiveness gas on the air.
5）Avoid gas welding in the environment of strong airflow.
2、Safety norms
The welding machine has installed protection circuit of over voltage and current
and heat. When voltage and output current and temperature of machine are
exceeding the rate standard, welding machine will stop working automatically.
Because that will be damage to welding machine, user must pay attention as
following.
1）The working area is adequately ventilated！
The welding machine is powerful machine, when it is being operated, it generated
by high currents, and natural wind will not satisfy machine cool demands. So
there is a fan in inter-machine to cool down machine. Make sure the intake is not
in block or covered, it is 0.3 meter from welding machine to objects of
environment. User should make sure the working area is adequately ventilated. It
is important for the performance and the longevity of the machine.
2）Do not over load！
The operator should remember to watch the max duty current (Response to the
selected duty cycle).
Keep welding current is not exceed max duty cycle current.
Over-load current will damage and burn up machine.
3）No over voltage！
Power voltage can be found in diagram of main technical data. Automatic
compensation circuit of voltage will assure that welding current keep in allowable
arrangement. If power voltage is exceeding allowance arrangement limited, it is
damaged to components of machine. The operator should understand the situation
and take preventive measures.
4）There is a grounding screw behind welding machine, there is grounding marker on
it Mantle must be grounded reliable with cable which section is over 6 square
millimeter I order to prevent from static electricity and leaking.
5）If welding time is exceeded duty cycle limited, welding machine will stop working
for protection. Because machine is overheated, temperature control switch is on
“ON’’ position and the indicator light is red. In this situation, you don’t have to
pull the plug, in order to let the fan cool the machine. When the indicator light is
off, and the temperature goes down to the standard range, it can weld again.
QUESTIONS IS BE RUN INTO IN WELDING
Fittings, welding materials, environment factor, supply powers maybe have
something to do with welding. User must try to improve welding environment.
A、Arcing-striking is difficult and easy to pause：
1) Make sure the earth cable clincher connects the work piece well.
2) Check each connecting point connected or not.
B、Output current can not reach rated volume：

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 9 -
That supplied voltage is different from the rated will lead to unconformity of the
output current and the adjusted current. When Supplied voltage lower than the rated,
the max output current will be lower than the rated.
C、Current is not stabilizing when machine is been operating.
It has something with factors as following:
1) Electric wire net voltage has been changed；
2) There is harmful interference from electric wire net or other equipment。
D Welding gap has air hole.
1) Check the gas supply loop leaks or not.
2) Surface of mother material has oil, stain, rust, lacquer or other impurity.
MAINTENANCE
CAUTION：
Before Maintenance and checking, power must be turned off, and before
Opening the housing, make sure the power plug is pulled off..
1、Remove dust by dry and clean compressed air regularly, if welding machine is
operating in environment where is polluted with smokes and pollution air, the
machine need remove dust everyday.
2、Pressure of compressed air must be inside the reasonable arrangement in order to
prevent damaging to small components of inter-machine.
3、Check inter circuit of welding machine regularly and make sure the cable
Circuit is connected correctly and connectors are connected tightly (especially
insert connector and components). If scale and loose are found, please give a
good polish to them, then connect them again tightly.
4、Avoid water and steam enter into inter-machine, if them enter into machine,
Please dry inter-machine then check insulation of machine.
5、If welding machine will not be operated long time, it must be put into packing
Box And store in dry environment.
6、When wire machine operates for every 300 hours, the electric carbon brush and
armature rectifier should be polished, the reducer should be cleaned, and
lubricator should be added to the turbo and bearing.

·MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI - 10 -
CHECK FAULT
Notes: If user wants to operate machine as following, the operator must be a
personnel in a specific field of electricity and safety and hold the relevant
certificate that proves there ability and knowledge. Before maintenance, contact
with our for authorization is suggested.
Faults
Resolvable Method
Power indicator
is not lit, fan
does not work
and no welding
output
1、Make sure air switch is closed.
2、Check if electric wire net is in work.
3、Some of heat-variable resistors(four) of power panel is
Damaged, when it happen, general DC24v relay is open or
Connectors are poor contact.
4、Power panel(bottom board) is damaged, DC 310V voltage
Cannot be output.
(1) Silicon bridge is broken or connector of silicon bridge
Poor contact.
(2) Power panel has been burned up.
(3) Check the wire from the power switch to input cable is poor
contact or not
5、Auxiliary power of control panel is in fault.
Power indicator
is lit, fan works,
no welding
output
1、Check if all kinds of cables of inter-machine are poor contact.
2、Output connector is cut off or poor contacted.
3、Control cable or switch of torch is broken.
4、Control circuit is broken.
Power indicator
is lit, fan works,
abnormal
indicator is lit.
1、Maybe it is overheated protection, please turn off machine first,
then turn on the machine again after abnormal indicator is off.
2、Maybe it is overheated protection, wait for 2-3 minutes.
3、Maybe inverter circuit is in fault:
(1) If abnormal indicator is still lit, some of IGBT is damaged on the
main board, find out and replace it with same model.
(2) If abnormal indicator is not lit,:
a. Maybe transformer is damaged, measure inductance volume
and Q volume of main transformer by inductance bridge.
b. Maybe secondary rectifier tube of transformer is damaged, find
out faults and replace rectifier tube with it.
If the machine fails to work normally after maintenance and check, please
contact us.We will do our best to support you the useful suggestions.