Jasic MIG250P User manual

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CONTENTS
1. SAFETY ---------------------------------------------------------------------------------------------------------------------------5
2. PRODUCT OVERVIEW -------------------------------------------------------------------------------------------------------6
3. SCHEMATIC BLOCK DIAGRAM-------------------------------------------------------------------------------------------7
4. MAIN WELDER TECHNICAL PARAMETERS--------------------------------------------------------------------------8
5. EXTERNAL CHARACTERISTIC CURVE--------------------------------------------------------------------------------9
6. PANEL STRUCTURE AND DESCRIPTION---------------------------------------------------------------------------10
7. MIG INSTALLTION, DEBUGGING AND OPERATION-------------------------------------------------------------14
8. MMA INSTALLATION, DEBUGGING AND OPERATION ---------------------------------------------------------23
9. DESCRIPTION OF FAULT ALARM AND FAULT CODE ON FRONT PANEL-------------------------------26
10. ATTENTION --------------------------------------------------------------------------------------------------------------------26
11. REPAIR AND MAINTENANCE--------------------------------------------------------------------------------------------27
12. CARRY AND STORAGE----------------------------------------------------------------------------------------------------27
13. FAILURE AND MAINTENANCE------------------------------------------------------------------------------------------28
14. MAIN CIRCUIT SCHEMATIC DIAGRAM AND WIRING DIAGRAM FOR CONTROL WIRE OF WIRE
FEEDER----------------------------------------------------------------------------------------------------------------------------------30

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DECLARATION
Hereby we declare that the product is designed according to domestic and international standards so
that it meets relevant standards such as GB/T 15579-1、IEC60974-1、EN60974-1、AS60974-1、UL60974-1.
Relevant design plans and manufacturing technologies of this product are patented.
Free warranty is provided by Shenzhen Jasic Technology Co., Ltd for products purchased for three
years date from being purchased.
Please read this manual carefully before operation.
1. This manual can be revised at any time without prior notice.
2. This manual has been checked carefully, but should you find any inaccuracy, please contact us.
3. This manual was released in May, 2019.
SHENZHEN JASIC TECHNOLOGY CO., LTD
Address: No. 3, Qinglan 1st Road, Pingshan District, Shenzhen Postcode：518118
Tel：[phone] Fax：[phone]
Website: Http://www.jasictech.com E-mail：[e-mail]

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1. SAFETY
Welding may result in injury to you and others, so please implement protection during welding. See more
details in Safety Protection Guidebook for Operator which meets the requirements to manufacturers on
accident prevention.
Operate this equipment by trained professional only!
·Use welding labor protection supplies with approval of safety
supervisory authority!
·Operators must be the special workers with valid work permits of “Metal
Welding (Gas Cutting) Operation”!
·Do not maintain and repair welder with power.
Electric shock-may result in serious injury or even death!
·Install grounding device according to application standard.
·Do not touch live parts with naked skin, wet gloves or wet clothes.
·Be sure you are insulated from ground and workpiece.
·Confirm the safety of your working position.
Smoke-may be harmful to your health!
·Keep your head away from the smoke to avoid inhalation of waste gas
in welding.
·Keep the working environment well ventilated with exhaust or ventilation
equipment when welding.
Arc radiation-may hurt your eyes and burn your skin!
·Use proper welding mask and wear protective clothing to protect your
eyes and body.
·Use proper mask or curtain to protect onlooker from being injured.
Improper use and operation may result in fire or explosion
·Welding spark may result in fire, so please make ensure there are no
inflammables near the welding position, and pay attention to fire
safety.
·Ensure there is fire extinguisher nearby, and make sure someone has
been trained to operate the fire extinguisher.
·Do not weld closed container.
·Do not use this machine for pipe thawing.

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Hot workpiece can cause severe scald.
·Do not touch hot workpiece with bare hands.
·Cool the welding torch for a while after continuously working.
Excessive noise does great harm to people’s hearing.
·Wear ear covers or other hearing protectors when welding.
·Give warning to onlooker that noise may be potentially hazardous to
hearing.
Magnetic field can make cardiac pacemaker a bit wonky.
·People with cardiac pacemaker should stay away from the welding spot
without first talking to a doctor.
Moving parts may injure your body.
·Please keep away from moving parts (like fan).
·Each door, panel, cover, baffle plate, and protective device the like
should be closed and located correctly.
Failure-seek professional support when trouble strikes.
·When trouble strikes in installation and operation, please inspect
according to related contents in this manual.
·If you still cannot understand fully, or you still cannot solve the problem,
please contact the dealer or the service center of JASIC to obtain
professional support.
2. PRODUCT OVERVIEW
2.1. Advanced IGBT inverter technology
2.1.1. Inverting frequency of 26.5KHz greatly reduces the volume and weight of the welder.
2.1.2. Great reduction in copper and iron loss obviously enhances the welding efficiency and energy saving
effect.
2.1.3. Switching frequency is beyond audiorange, which almost eliminates noise pollution.
2.2. Leading control mode
2.2.1. Closed loop feedback control, stable output voltage, strong ability to resist network voltage fluctuation.

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2.2.2. Unique control circuit of welding dynamic characteristic, stable welding arc, excellent spot welding, less
spatter, nice shape, high welding efficiency.
2.2.3. Molten globule can be removed after welding. With high no-load voltage and slow wire feeding on
striking arc, arc striking success rate can be increased.
2.3. Perfect function design
2.3.1. With synergic MIG, welding parameters can be automatically selected based on wire feed speed.
2.3.2. Four welding modes include MMA, lift TIG, DC MIG/MAG, digital control and humanized operation
panel is available.
2.3.3. Functions such as accurate preset current/voltage, 2T/4T operation mode, synergic, gas selection, wire
diameter selection, electronic inductance adjustment, and on-demand fan and so on are available.
2.3.4. Effective protective functions including over-current, overload, current sharing, etc are available.
3. SCHEMATIC BLOCK DIAGRAM
Single-phase rectifying
Filter board
Auxiliary power
Full-bridge
inverter
Rectifying output
ARM
processor
Single-phase AC power
Panel display
Voltage
Current
Drive circuit of
wire feeder
Mutual inductor
PWM
流环
Drive board

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4. MAIN WELDER TECHNICAL PARAMETERS
Model
MIG250P(N24901)
Input
Input power
AC230V single-phase ±15% 50/60Hz
Rated input capacity
9.13KVA
Power factor
0.76
Output
Rated no-load voltage
75V
Rated maximum output
MMA 250A/30V
Lift TIG 250/20V
MIG 250A/26.5V
Rated duty cycle
40%@AC230V Single-phase
Welding voltage
13.5V～36V@AC230V Single-phase
Welding current
MMA 15A/20.6V～250A/30V
Lift TIG 15A/10.6V～250A/20V
MIG/pulsed MIG 40A/16V～250A/26.5V
Output characteristic
MIG/MAG: CV MMA: CC
Ambient
Operation temperature
-10～+40℃
Storage temperature
-25～+55℃
Protection class
IP21S
Insulation class
F
Cooling method
Air cooling
Others
Rated efficiency
82%
Dimension of bare welding
source
895*445*760 mm
Dimension of packaged
welding source
1010*585*840 mm
Weight of bare welding
source
49.7kg
Weight of complete welding
source
64.4kg

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5. EXTERNAL CHARACTERISTIC CURVE
External characteristic for MMA External characteristic for MIG/MAG
Welding current I/A
Welding current I/A
Welding
voltage
U/V
Welding
voltage
U/V

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6. PANEL STRUCTURE AND DESCRIPTION
6.1. Panel structure and
description
Picture 1 Front panel
No.
Component
name
Component function
1
Segment display
Display welding current and
welding function
2
Adjusting knob
Welding function selection
and welding parameters
setting
3
Gas check
button
Welder gas check
4
Welding mode
button
MMA, TIG, MIG and pulse
MIG selection
5
Welding material
button
Carbon steel/stainless steel/
aluminum-silicon/
aluminum-magnesium
selection
6
Euro output
connector
Euro torch connector for
MIG
7
Polarity adapter
Euro output socket for
polarity selection
8
Segment display
Display welding voltage and
welding parameters setting
9
Adjusting knob
Setting for welding
parameters and board
thickness
10
Synergic button
Synergic/separated
selection
11
Welding function
button
Parameters setting for
pre-flow, post-flow, striking
arc, stopping arc, upslope
and downslope
12
Welding method
button
Spot/2T/4T selection
13
Wire diameter
button
Wire diameter selection
14
Welder output
socket
“+ ”output
15
Welder output
socket
“-”output