MIG350C - Welding machine JASIC - Free user manual and instructions

Product type	Professional MIG/MAG welding machine with IGBT inverter
Brand	JASIC
Model	MIG350C (ref. evo20 mig350c n2sd2)
Welding processes	MIG/MAG, MMA (covered electrode), TIG with Lift start
Technology	High-frequency IGBT inverter
Power supply	380 V three-phase ± 15%, 50/60 Hz
MIG welding current	50 to 350 A
MMA welding current	30 to 350 A
Welding voltage	16.5 to 35 V (MIG/MAG)
Duty cycle	60% at 350 A
Wire diameter	0.8 to 1.6 mm (solid or flux-cored wire)
Cooling type	Forced ventilation
Protection rating	IP21S
Insulation class	H
Dimensions (L × W × H)	750 × 320 × 650 mm
Weight	52 kg
Settings	Independent voltage and wire feed speed, adjustable inductance
Special functions	2T/4T mode, spot welding, hot arc, anti-stick
Connectivity	Digital/analog MIG torch, wired remote control/foot pedal, optional Bluetooth module, Type-C port
Maintenance	Regular cleaning of the interior (dust) and checking of connections
Safety	Protection against overheating, overvoltage, undervoltage and overcurrent
Spare parts and repairability	Accessible modular components; maintenance by a qualified professional
General information	Compliant with EN60974-1 standard

Frequently Asked Questions - MIG350C JASIC

What is the required power supply for the JASIC MIG350C?

The unit requires a three-phase 380 V ± 15% power supply with a frequency of 50/60 Hz. Ensure that the circuit breaker and wiring are suitable for the device's power.

What welding processes can I perform with this device?

The JASIC MIG350C supports MIG/MAG welding with continuous wire, MMA welding (covered electrode) and TIG welding with Lift start.

How do I adjust the wire speed and voltage for MIG welding?

Use the independent settings for voltage and wire speed on the control panel. Adjust the voltage according to the metal thickness, then the wire speed to obtain a stable arc and a good bead appearance.

Does the machine support TIG welding?

Yes, it has a Lift TIG mode that allows starting without high frequency. This mode is convenient for precision work on stainless steel or aluminum.

How does Bluetooth connectivity work?

The optional Bluetooth module allows you to connect the machine to a JASIC mobile app. You can then control the settings, track consumables and access advanced functions from your smartphone.

How do I install the Bluetooth module or the Type-C module?

Disconnect the device, then open the dedicated compartment on the rear panel. Insert the Bluetooth or Type-C module respecting the orientation, close the cover and reconnect the power. Refer to the manual for more details.

What safety precautions should be followed?

Wear protective equipment: auto-darkening helmet, insulating gloves, flame-resistant clothing. Ensure adequate ventilation and avoid flammable materials nearby. Never touch live parts.

How do I maintain the welding machine?

Disconnect the device before any intervention. Regularly blow out dust inside with dry compressed air. Check the electrical connections and the condition of the ground cable and torch.

What to do in case of an error code on the screen?

Refer to the troubleshooting section of the manual. Codes generally indicate problems with overheating, overvoltage or undervoltage. Turn off the power, let it cool down and check the mains voltage before restarting.

Can I use a wired remote control or a foot pedal?

Yes, the machine is compatible with a wired manual remote control and a foot pedal for remote current control. Connect the accessory to the dedicated socket and enable the corresponding mode in the settings.

USER MANUAL MIG350C JASIC

MIG350C

IGBT INVERTER WELDER

Congratulations on choosing JASIC equipment! This operating manual contains important information on the use and maintenance of this product, as well as safe handling of the product. Please refer to technical parameters of the equipment in Technical Parameter in this manual, and read the manual carefully before using the equipment for the first time. For your own safety and that of your working environment, please pay particular attention to the safety instructions in the manual and operate the equipment according to the instructions. For more information on JASIC products, please contact JASIC Technology, consult an authorized JASIC dealer or visit JASIC website at www.jasictech.com.

Disclaimer

Shenzhen JASIC Technology Co., Ltd. solemnly promises that this product is manufactured according to relevant domestic and international standards, and that this product conforms to EN60974-1 International Safety Standard. The relevant design scheme and manufacturing technology adopted in this product are protected by patents.

1. While every effort has been made to ensure that the information contained in this manual is accurate and complete, no liability will be accepted for any errors or omissions due to the operation not according to this manual.
2. JASIC reserves the right to change the manual at any time without prior notice.
3. Though contents in this manual have been carefully checked, there might be inaccuracies. Please contact us in case of inaccuracy.
4. Do not copy, record, reproduce or transmit the contents of this manual without prior permission from JASIC.

Manufacturer: Shenzhen JASIC Technology Co. Ltd Registered Trademark: JASIC

Registered Address: No.3 Qinglan 1st Road, Pingshan District, Shenzhen, Guangdong, China Postcode: 518118

Tel: [phone]

Website:www.jasictech.com

Fax: [phone]

E-mail: [e-mail]

Table of Contents

1. Safety precautions....6
   1.1. General safety 6
   1.2.Precautions 7
2. Description of symbols 9
3. Product overview 11
4. 1. Technical parameters ...... 13
5. Installation 15
   5.1. External interface description.... 16
   5.2. Power supply installation....17
   5.3.1 Digital/analog MIG torch 18
   5.3.1.1 DCEP 18
   5.4.MMA electrode holder and earth cable connection....21
   5.5. TIG welding torch and earth cable connection 22
   5.6. Connection of wired handheld remote controller/pedal controller 23
   5.7. Installation of Bluetooth transceiver module 23
   5.8. APP transceiver module installation (optional) 24
   5.9. Type-C module installation 24
6. Control panel 25
   6.1. Overview 25
   6.2. Barcode display 32
   6.3. Resetting to the factory setting 33
   6.4. Welding engineer mode....34
7. Welding function operation 37
   7.1. MIG operation....37
   7.2. MMA operation 45
   7.3. Lift-TIG operation....47
   7.3.1. Turn on the power switch....47
   7.3.2. Select the Lift-TIG mode 47
   7.3.3. Set welding parameters 48
   7.3.4. Start welding 48
   7.3.5. Turn off the power supply after welding 49
   7.4. Standby 49
   7.5. Function and use of wireless or remote controller 49
   7.6. Software upgrading function operation....50
8. Maintenance and care ....51
9. Troubleshooting 52
   9.1. Troubleshooting of common problems 52
   9.2. Alarm and solutions .... 56
   9.3. Common problems in MIG mode....58

10. Packaging, Transportation, Storage, and Waste Disposal 59
    10.1. Transportation requirements....59
    10.2. Storage conditions....59
    10.3. Waste disposal 59

11. After-sales service 60

Appendixes 61

Appendix 1: Wiring diagram of the machine....61

Appendix 2: Common spare parts list....62

Appendix 3: Package and spare parts....65

For your safety, please read this manual carefully before installing and operating this JASIC equipment.

Pay extra attention to all content marked with " !".

All operations must be carried out by professional, suitably qualified persons!

1. Safety precautions

1.1. General safety

Warning! During welding, arc and cutting smoke may cause harm to you and others.

Therefore, you shall take protective measures during welding. For details, refer to the safety protection guidelines for operators that meet the manufacturer's accident prevention requirements.

	Only qualified personnel should operate this machine! ·Always use the appropriate personal protective equipment. ·The operator must be a special equipment operator with a valid Metal Welding (Gas Cutting) Operation certificate! ·Do not carry out any maintenance with the power on the machine
	Electric shock—May cause serious injury or even death! ·Install grounding devices according to application standards. ·Do not touch any live parts with your exposed skin, wet gloves, or wet clothes. ·Make sure that you are insulated from the ground and the workpiece. ·Make sure that the workstation is safe.
	Fumes and gases—May be hazardous to your health. ·Locate the equipment in a well-ventilated position and keep your head out of the fume. Do not breathe the fume. ·When welding, use ventilation or extraction devices to maintain a well-ventilated working environment.
	Arc rays—May injure the eyes and burn the skin. ·Use a suitable welding mask and wear protective clothing to protect your eyes and body. ·Protect bystanders from hazards with suitable masks or shading curtains.
	Improper use and operation may lead to fire or explosion ·Welding sparks may cause a fire. Please confirm that there are no flammable materials near the welding station and pay attention to safety and fire prevention. ·The fire extinguishing devices shall be set up nearby and the trained personnel proficient in using them shall be available. ·Do not weld any closed containers. ·It is prohibited to use the machine for pipeline thawing.Hot workpieces may cause serious burns·Do not touch hot workpieces with bare hands.·There should be a cooling time when using the welding torch continuously.
	Noise——Excessive noise may be harmful to hearing·Protect your ears with ear shields or other hearing protectors.·Remind nearby personnel that noise may be potentially hazardous to hearing.
	Magnetic field affects cardiac pacemaker·Before consulting a doctor, pacemaker users should stay away from the welding site.
	Moving parts may cause personal injury·Keep away from moving parts such as fans.·Various protective devices such as doors, panels, covers, and baffles, etc. should be tightly closed and put in place.
	Fault--When encountering difficulties, seek help from professionals.·For difficulties during installation and operation, please follow the relevant content of this manual for troubleshooting.·If you still cannot fully understand the content contained in this manual after reading, or cannot solve the problem as per the instructions in this manual, immediately contact your supplier or the service center of JASIC to seek professional assistance.

1.2.Precautions

Warning! If the equipment tips over or falls, it may be damaged, or personal injury may result. Therefore, refer to the handling and placement methods indicated on the outer package and use a trolley or similar handling

equipment with a sufficient load-carrying capacity to handle the equipment.

Warning! The handle or strap on the welder is only suitable for carrying the welder by hand. When lifting the welder using a crane or other machines, put the welder in a container with a sufficient load-carrying capacity and then lift the welder together with the container.

Warning! The welder has over-voltage, over-current, and over-heating protection circuits. Thus, the welder will stop working when the mains voltage, output current, or internal temperature exceeds the set value. However, if the cutter is still in use in a condition exceeding the set value (such as

over-voltage), the welder may be damaged. Therefore, you need to pay attention to the following conditions.

1) When the operator's movement is limited by the surroundings (for example, the operator can only bend his knees, barefoot, or lie down during operation), the operator shall practice proper insulation and avoid direct contact with conductive parts on the equipment.
2) Do not use the welder in closed containers in narrow spaces where conductive components cannot be removed.
3) Do not use the welder in humid environments where the operator is prone to the risk of electric shock.
4) Do not weld in sunlight or rain, and no water or rainwater shall seep into the welder.
5) Do not perform gas shielded welding in an environment with strong air flow.
6) Avoid using the welder in dusty area or environment with corrosive chemical gas.
7) 7) The ambient temperature should be between -10°C to 40°C during operation and between -25°C to 50°C during storage.
8) 8) The welding should be performed in a relatively dry environment with a humidity of no more than 90% .
9) 9) The inclination of the welder should not exceed 10° .
10) 10) Ensure that the input power voltage does not exceed ± 15% of the machine's rating voltage.
11) 11) Be cautious that the welder may fall from a high place during welding.

2. Description of symbols

Warning! Read the explanation

High-voltage warning

WEEE tag

Current unit "A"

m/min

Wire feed speed (m/min)

Base metal thickness (unit: mm)

Time unit (unit: seconds)

Voltage (unit: V)

MIG "Inductance"/MMA "arc force current"

MIG burnback time (unit: ms)

JOB

Channel indicator (10 groups for each welding mode)

Parameter selection indication

MIG welding parameters

MIG crater welding parameters

Overheat protection indication

Overcurrent protection indication

VRD function indication

MMA mode

MIG mode

TIG mode

Welding mode selection

SteelAr80% CO220%	Gas mixture containing 80% argon and 20% CO2 for carbon steel welding
Al Ar100%	100% argon for aluminum welding
SteelAr93% CO25% O22%	Gas mixture containing 93% argon, 5% CO2, and 2% oxygen for carbon steel welding
CrNiAr98% CO22%	Gas mixture containing 98% argon and 2% CO2 for stainless steel welding
Steel FluxCoredAr80% CO220%	Gas mixture containing 80% argon and 20% CO2 for flux-cored carbon steel welding
Steel FCW-SS	Carbon steel self-shielded flux cored arc welding
	Welding type selection: base metal and gas selection function for welding
φ 0.8
φ 1.0	Welding wire diameter
φ 1.2
	MIG/Lift-TIG two-step operation
[W28S]	MIG/Lift-TIG four-step operation
	Repeat mode
	Spot welding mode
	MIG standard torch
	MIG push-pull torch
	MIG spool torch
	Function switch
	Remote control function
	MIG synergic function
	Channel saving
	Channel call
	Wire inching function
	Gas check function

3. Product overview

MIG350C

This series of welders is a digital multi-function DC GMAW welder with excellent performance and advanced technology, which features three welding modes: DC MIG, DC MMA, and Lift-TIG. It can be widely used for welding various metal materials, such as carbon steel, low-alloy steel, aluminum-magnesium alloy, and stainless steel. In the DC MIG mode, parameters such as welding voltage, welding current, wire feed speed, and sheet thickness can be preset. A built-in "Synergic" expert parameter database is provided for welding wires of different materials and diameters. The operator needs to set welding current, wire feed speed, or sheet thickness only after choosing the welding wire type, shielding gas, and welding wire diameter via the panel. The welder can match the appropriate welding voltage automatically to achieve an excellent welding effect. Both the MMA and lift-TIG modes also make the welder applicable in more application scenarios. The unique electrical structure and zoned diverted air passage design inside the machine increases heat dissipation efficiency and balances the temperature rise of power devices, thus improving the duty cycle of the machine. Due to the unique sealed air passage, the machine can effectively prevent dust drawn in by the fan from damaging power devices and control circuits, thus greatly improving the reliability of the machine.

The main functions are as follows:

◆ There are three welding modes: MIG, MMA, and lift-TIG.
◆ In the MIG mode, welding voltage, welding current, wire feed speed, sheet thickness, and welding inductance can be preset.

◆ The welder has gas checking, wire checking, and wire diameter selection functions.

◆ "Synergic" function: It is necessary to choose welding wire type, shielding gas, and wire diameter. It's only required to set welding current, wire feed speed, or sheet thickness. The welder will match the welding voltage automatically.

◆ Multiple MIG torch options include: ordinary standard torch, digital standard torch, push-pull torch, and spool torch.

◆ In the MMA mode, the welding current, arc force current, and hot start current can be preset.
◆ The VRD function reduces the no-load voltage output by the welder to below the safe voltage level that can be withstood by the human body, making it safer and more stable for electricity use.
◆ Anti-stick function: Prevents excessive output current from burning the electrode and base material when welding sticks to the electrode.
◆ Torch-trigger-controlled Lift-TIG.
◆ On-demand fan control: This function can save electricity, prolong the lifespan of the fan, and reduce accumulation of dust inside the machine.
◆ Automatic parameter saving function: After shutdown, the data will not be lost. When the welder is restarted, it is retain the parameters set before shutdown.
◆ Parameter factory reset function.
◆ Standby function: In the MIG or lift-TIG mode, the welder will enter the standby state if it is not used for a long time.
◆ Remote control function: The welder can be equipped with functions such as wireless handheld remote control, wireless foot pedal remote control, wired foot petal remote control, wireless helmet remote control, and mobile phone APP.

1. 1. Technical parameters

Descriptions	Unit	MIG350C parameters
Product model	/	MIG350C
Power supply voltage	VAC	3~AC400±15%
Input frequency	Hz	50/60
Rated input current (AC400V)	A	20.6@MIG16.1@TIG21.7@MMA
Rated input power (AC400V)	kVA	14.3@MIG11.2@TIG15.0@MMA
Output voltage adjustment range (MIG)	V	10~40
Wire feeding speed range (MIG)	m/min	2~24
Output current range (MIG)	A	30~350
Output current adjustment range (TIG)	A	20 ~ 350
Output current range (MMA)	A	20 ~ 350
Arc force range	A	0 ~ 100, defaulted to 40
Hot start current adjustment range	A	0 ~ 200, defaulted to 100
No-load voltage	V	75
VRD voltage	V	13.5
Rated working voltage	V	31.5@MIG24@TIG34@MMA
Efficiency (%)	/	82@MIG80@TIG84@MMA
Duty cycle (%)	/	40@MIG40@TIG40@MMA
Power factor	/	0.94@MIG0.94@TIG0.94@MMA
Generator capacity	kVA	38
Insulation class	/	H
Enclosure class	/	IP23S
Dimensions L*W*H	mm	941*482**753
Length*width*height of the machine	mm	1000*530*933
Net weight	Kg	45.1
Overall total weight	Kg	80.0
Power consumption in idle state	W	<50
Static and external characteristics	/	CC/CV
Pollution level	/	Level 3

5. Installation

Warning! All connections shall be made with the power supply turned off. Warning! Electric shock may cause death; after power failure, there is still a high voltage on the equipment, do not touch the live parts on the equipment. Warning! Incorrect voltage may damage the equipment.

Warning! This product meets the requirements of Class A equipment in EMC requirements and is not to be connected to a residential low-voltage power supply grid.

Wiring diagram of three-phase distribution box

1) Provide a power switch of distribution box
2) Use a fuse with a rated current of not less than 60 A.
3) The MIG350C welder should be provided with a power cable of 4 × 2.5mm² or above.
4) Yellow/green grounding wire (It is grounded instead of being connected to the neutral wire!).
Please connect the power cable by the method shown in the figure or other correct ways.

Warning: Do not operate with electricity!

• The wiring of the machine can only be carried out by professional electricians.
• Do not connect two welders to the same switch box.
• If the casing is grounded, wire 4 does not need to be grounded.

5.1. External interface description

MIG350C

(Front panel view)

(Rear panel view)

a.Knob switch
b.Input power cable
c. Type-C interface (for software upgrading or charging)
d.Heater socket (optional)
e. Air valve inlet nozzle
f.Wireless Bluetooth transceiver module
g. European MIG welding torch interface
h.Nine-pin aviation socket
i. Positive polarity
j.Negative polarity
k. Positive/negative polarity-reversing plug

5.2. Power supply installation

Warning! The electrical connection of the machine must be completed by electricians with qualification certificates.

Warning! All connections shall be made with the power supply turned off.

Warning! Incorrect voltage may damage the equipment.

1) Ensure the input voltage value is within the specified input voltage range.
2) Ensure that the power switch of the welder is turned off.
3) Connect the input power cable to the input terminal or plug the power cable into the corresponding socket (if any) and ensure good contact.
4) Ensure the power supply is properly grounded.

Note!

When extending the input cable is required, use a cable with a cross-sectional area that is same as or or larger than that of the original power cable to reduce the voltage drop.

5.3. MIG welding torch and earth cable connection

5.3.1 Digital/analog MIG torch

Pay attention to the polarity of wiring before performing MIG welding. Generally, there are two connection methods for DC welder: DCEN and DCEP.

DCEP: The welding torch is connected to the positive polarity, and the workpiece to the negative polarity;

DCEN: The electrode holder is connected to the negative polarity, and the workpiece is connected to the positive polarity;

When this series of welders works in the MIG mode, DCEP is generally used for all other MIG types except that DCEN is used in the carbon steel flux-cored self-shielded welding mode.

5.3.1.1 DCEP

(MIG connection diagram: DCEP)

1) Ensure that the power switch of the welder is turned off.
2) Insert the welding torch plug into the central socket interface on the front panel of the welder and tighten it firmly in a clockwise direction.
3) Insert the cable plug with an earth clamp into the negative output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
4) Insert the positive/negative polarity-reversing plug into the positive output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
5) Connect one end of the gas hose to the gas inlet nozzle on the rear panel of the welder, and the other end to the output interface of the shielding gas regulator; secure it firmly with a clamp.

5.3.1.2 DCEN

1) Ensure that the power switch of the welder is turned off.
2) Insert the welding torch plug into the central socket interface on the front panel of the welder and tighten it firmly in a clockwise direction.
3) Insert the cable plug with an earth clamp into the positive output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
4) Insert the polarity-reversing plug into the negative output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
5) Connect one end of the gas hose to the gas inlet nozzle on the rear panel of the welder and the other end to the output interface of the shielding gas regulator and secure it firmly with a clamp.

Note! During carbon steel flux-cored self-shielded welding, a special knurled wire feed roller should be used. Additionally, DCEN should be used.

During aluminum-magnesium alloy welding, a special wire feed roller with a U-shaped groove, a contact tip for Aluminum wire, and a liner with a diameter of 2.0 should be used for aluminum welding. Additionally, "DCEP" should be used.

5.3.2 Spool torch

(Spool torch connection diagram: DCEP)

Before MIG welding, attention should be paid to the positive and negative polarity connection of the welder. For more details, see 5.3.1. Taking the "DECP" as an example:

1) Ensure that the power switch of the welder is turned off.
2) Insert the welding torch plug into the central socket interface on the front panel of the welder and tighten it firmly in a clockwise direction.
3) Insert the nine-pin control plug into the nine-pin aviation socket on the front panel of the welder and tighten it firmly in a clockwise direction.
4) Insert the cable plug with an earth clamp into the negative output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
5) Insert the positive/negative polarity-reversing plug into the positive output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
6) Connect one end of the gas hose to the gas inlet nozzle on the rear panel of the welder and the other end to the output interface of the shielding gas regulator and secure it firmly with a clamp.

5.4.MMA electrode holder and earth cable connection

(MMA connection diagram: DCEP)

Pay attention to the polarity of wiring before performing MMA welding. Generally, there are two connection methods of DC welder: DCEN and DCEP.

DCEP: The electrode holder is connected to the positive polarity, and the workpiece to the negative polarity;

DCEN: The electrode holder is connected to the negative polarity, and the workpiece to the positive polarity;

The operator can also choose DCEN based on the base metal and electrode. Generally speaking, DCEP is recommended for basic electrodes (i.e., electrode connected to the positive polarity), while no special provisions are made for acid electrodes.

1) Ensure that the power switch of the welder is turned off.
2) Insert the cable plug with an electrode holder into the corresponding socket on the front panel of the welder and tighten it firmly in a clockwise direction.
3) Insert the cable plug with an earth clamp into the corresponding socket on the front panel of the welder and tighten it firmly in a clockwise direction.

Note! If the workpiece is far away from the welder, and the secondary cables (electrode holder cable and earth cable) used are long, the recommended cross-sectional area of the cables used should be appropriately larger to reduce the cable voltage drop.

5.5. TIG welding torch and earth cable connection

(Lift-TIG connection diagram: DCEN)

1) Ensure that the power switch of the welder is turned off.
2) Insert the welding torch plug into the central socket interface on the front panel of the welder and tighten it firmly in a clockwise direction.
3) Insert the cable plug with an earth clamp into the positive output socket on the front panel of the welder and tighten it firmly in a clockwise direction.
4) Insert the positive/negative polarity-reversing plug into the negative output socket on the front panel of the welder and tighten it firmly in a clockwise direction.

Note! The positive and negative polarities should not be reversed as this will prevent normal welding operation.

5) Connect one end of the gas hose to the gas inlet nozzle on the rear panel of the welder and the other end to the output interface of the shielding gas regulator and secure it firmly with a clamp.

Note! If the workpiece is far away from the welder, and the secondary cables (electrode holder cable and earth cable) used are long, the recommended cross-sectional area of the cables used should be appropriately larger to reduce the cable voltage drop.

5.6. Connection of wired handheld remote controller/pedal controller

(Wired remote controller wiring diagram)

Insert the nine-pin aviation plug of the handheld remote controller or foot pedal controller directly into the corresponding aviation socket of the machine.

Note! Please check with the seller whether the hardware and software versions of the machine support wired handheld remote controller before installation.

5.7. Installation of Bluetooth transceiver module

1) Remove the right cover of the machine by unscrewing the screws.
2) Insert Bluetooth module, as shown in the figure above, into the Bluetooth module hole of the front panel.
3) Insert the connecting cable of the Bluetooth module into the 7P terminal block CN19 on the control panel PK-530, as shown in the figure to the upper right.

5.8. APP transceiver module installation (optional)

1) Remove the left cover of the machine by unscrewing the screws and then remove the front panel.
2) Insert the APP module b on the right side of the machine shown in the figure above into the APP fixing bracket of the front panel and secure it firmly.
3) Insert the connecting cable of the APP module to the 6P terminal block CN12 of control panel PK-530, as shown in the figure to the upper right.

Note! Please check with the seller whether the hardware and software versions of the machine support the APP module function before purchase.

5.9. Type-C module installation

1) Remove the right cover of the machine by unscrewing the screws, and then remove the rear panel.

2) Insert the Type-C module c on the left side of the machine shown in the figure above into the Type-c port on the rear panel.

3) Insert the connecting cable of the Type-C module to 5P terminal block CN26 of control panel PK-530, as shown in the figure to the upper right

6. Control panel

6.1. Overview

(Operation panel)

a.Parameter display a
b.Parameter display b
c.Welding mode selection
d.Selection of welding material
and gas
e.Welding torch type selection
f.Operation mode selection
g.Wire diameter selection
h.Remote control function
i.Synergic
j.Saving function
k.Call function
I. Parameter selection function
m.Wire check
n.Gas check
o.Alarm/protection indicator
p.VRD function indicator
q.Parameter adjustment knob A
r.Parameter adjustment knob B

a. Parameter display a

1) "Parameter display a" is used to display the current parameter, wire feed speed, sheet thickness, spot welding time, and error code.
2) Before the welding, the current parameter setting is displayed. If no operation is performed for a long time, it jumps to display the default parameter automatically.
3) During welding, the actual output current value is displayed.
4) When the welding is finished, it displays the actual current value saved before the welding ends.
5) When the machine enters the engineer mode menu or its factory settings are reset, the countdown is displayed.
6) During the barcode query, the machine's barcode is displayed.
7) When the product is not working correctly, an error code is displayed.
8) When the synergic function is enabled in MIG mode, the synergic ammeter set by the setting parameter number "F12" in the engineer menu (for details, see section 6.4) displays default parameter settings in the default display option, including current, wire feed speed, and sheet thickness. When the synergic function is disabled in MIG mode, it displays the wire feed speed setting.
9) In the MMA or lift-TIG mode, the current parameter settings are displayed by default.

b. Parameter display b

"Parameter display b" is used to display voltage parameter, inductance or arc force current, burnback time, and saving channel parameter.

1) Before the welding, the current parameter setting is displayed. If no operation is performed for a long time, it jumps to display the default parameter automatically.
2) During welding, the actual output voltage value is displayed.
3) When the welding is finished, it displays the actual current value saved before the welding ends.
4) In the MIG mode, it displays the voltage setting by default. In the MMA mode, it displays the VRD voltage by default when the VRD is switched on, and the no-load voltage when the VRD is switched off. In the lift-TIG mode, it displays the voltage by default.

C. Welding mode selection

Before welding, press the welding mode selection key 🧑 to switch among the MIG, MMA, and lift-TIG modes. The user can choose the desired welding mode as required.

1). The indicator is on, indicating that the machine is operating in MIG mode;
2) The indicator is on, indicating that the machine is operating in MMA mode.
3) The indicator is on, indicating that the machine is operating in Lift-TIG mode.

Note! When the welder is in the welding state or the torch trigger is pressed, the welding mode selection function is disabled.

d. Selection of MIG welding material and gas

Steel

Ar80% CO ₂ 20%

CrNi

Ar98% CO ₂ 2%

Al Ar100%

Steel FluxCored

Ar80% CO ₂ 20%

Steel

Ar93% CO 2 5% O 2 2%

Steel FCW-SS

to switch between the
1) In the MIG mode, press the welding type selection key ☐ to switch between the welding wire types and shielding gases.
2) The corresponding welding type indicator comes on, indicating that the current welding wire type and shielding gas have been selected.

e. Selection of the standard torch, push-pull torch, or spool torch function

1) In the MIG mode, press the corresponding function switch key to select the standard torch, push-pull torch, or spool torch function.

2) The indicator is on, indicating that the machine is in the wire pushing torch state in MIG mode; The indicator is on, indicating that it is in the spool torch state in MIG mode.

3) The indicator is on, indicating that the machine is in spool torch state in MIG mode; f. Selection of the MIG welding wire diameter

φ 0.8
φ 1.0
φ 1.2

1) In the MIG mode, press the corresponding function switch key to select the selectable welding wire diameter for the selected welding type.
2) The corresponding welding wire diameter indicator lights up, indicating that the welding wire diameter has been selected.

g. Operation mode selection

↓↑
↑↑
()
...

1) In the MIG mode, press the corresponding function switch key ⇔ to select the 2T, 4T, repeat, or spot welding mode.
2) In the lift-TIG mode, press the corresponding function switch key ⇔ to select the 2T or 4T mode.
3) The indicator lights up, indicating that the machine is in 2T operation mode;
4) The indicator lights up, indicating that the machine is in 4T operation mode;
5) (t) The indicator lights up, indicating that the machine is in repeat mode;
6) ●●● The indicator lights up, indicating that the machine is in spot welding mode;

h. Selection of remote control function

Wired remote control

1) Enter the engineer mode menu (for details, see section 6.4) to set the parameter designated with serial number "F09" to "1". Then, save the setting and exit the engineer mode.

2) Before welding, press the remote control function key to turn on or turn off the remote control function;

3) If the indicator is on, it indicates that the remote control function is enabled. If the indicator is not on, it indicates that the remote control function is disabled.

Wireless remote control

1) Set the remote control mode to wireless remote control mode

Enter the engineer mode menu (for details, see section 6.4) to set the parameter designated with serial number "F09" to "0". Then, save the setting and exit the engineer mode.

2) Wireless pairing

Before welding, press and hold the panel remote control function key 📋 and the pairing key 📄 of the wireless remote controller simultaneously for 2 seconds to pair the wireless remote controller. During pairing, the blue wireless receiver module indicator

flashes; after successful pairing, the remote control mode indicator will light up. At the same time, the blue indicator 📋 on the wireless receiver module will remain lit, and the welder display window will display "OK".

After the pairing is successful, it is possible to adjust the parameters via the wireless remote controller.

3) Wireless connection off

After successfully connecting the remote controller, press and hold the remote control function of the panel or the pairing key on the wireless remote controller for 2 seconds to disconnect the remote controller. After disconnection, the welder's display window displays "FAL" symbol. In the meantime, the wireless transceiver module indicator

remains green.

Note: For different remote controller types, the pairing key symbol may vary. Therefore, the actual symbol should take precedence. For the specific operation method, refer to the remote controller instructions.

i. Selection of the MIG synergic switch

SYN

1) In the MIG mode, press the synergic switch key SYN to enable or disable the synergic function;

2) The corresponding indicator lights up, indicating that the synergic function is enabled.

The indicator lights up, indicating that the synergic function is disabled.

3) In the synergic mode, the welder automatically matches the welding parameters based on the set current parameter, wire feed speed, sheet thickness, welding type, and welding wire

diameter.

j. Saving function

1) In any "Welding mode", gently press the "Saving key" to enter the "Saving mode". In this case, the "Saving indicator" and the "Job indicator" light up, and the corresponding digital display of the "Job indicator" displays the current "Job number". The parameter group number is represented by "n01", "n02", "n03"....."n10". Each "Welding mode" has ten Job numbers (parameter group channel);
2) The corresponding encoder of the "Job indicator" can be rotated to switch the "Job number". Pressing the key on the encoder will display other parameters on the corresponding digital tube of the "Job indicator";
3) After the "Job number" is selected, gently press the "Saving key" to save parameters, and exit the "Saving mode"; in this case, the "Saving indicator" and "Job indicator" will turn off, and the corresponding digital tube of the "Job indicator" will display the first parameter.

k. Call function

1) Gently press the "Call key" to enter the "Call mode". In this case, both the "Call indicator" and the "Job indicator" will light up, and the digital tube of the "Job indicator" will display the "Job number";
2) The corresponding encoder of the "Job indicator" can be rotated to switch the "Job number". Pressing the key on the encoder will display other parameters on the corresponding digital tube of the "Job indicator". The digital tube can display the parameter corresponding to the "Job number" by switching the "Job number", but the parameters cannot be adjusted;
3) After the "Job number" is selected, gently press "Call key" to call parameters, and exit the "Call mode"; in this case, the "Call indicator" and "Job indicator" will turn off, and the corresponding digital tube of the "Job indicator" will display the first parameter. At this moment, the parameter can be adjusted normally.

I. Parameter function selection

1) The key has two states, welding parameters and crater welding parameters.
2) Key response condition: The key responds in MIG 4T and repeat modes.
3) When switching to the crater welding section occurs, the welding parameters for the crater welding section can be adjusted.

m. Wire check function switch

1) In the MIG mode, press the wire check function switch key 📋 to start the wire check function, and release the key to disable the function.

2) If the corresponding indicator enabled, it starts wire feeding.
lights up, indicating that the wire check function is
n. Gas check function switch

1) In the MIG mode, press the gas check function key to enable or disable the gas check function.
2) When the corresponding indicator lights up, it indicates that the gas check function is enabled and the gas valve is open. When the indicator turns off, it indicates that the gas check function is disabled, and the gas valve is closed.

Note that the gas check function will automatically stop in 20 seconds to avoid wasting gas.

o. Protection/alarm indicator

If the overheat indicator lights up, it indicates that the welder has entered overheat protection mode and has stopped output.

In this case, do not shut down the welder but wait for a while after stopping the welding. After the over-heat indicator comes off, the welding can resume.

If the overcurrent indicator lights up, it indicates that the welder has entered the overcurrent protection mode and has stopped output.

In this case, restart the welder. If the overcurrent or alarm problem persists, please contact the manufacturer's after-sales service.

p. VRD function indicator

1) When the VRD function remains disabled during welding, the VRD indicator is not lit.
2) Where the VRD function is enabled when no welding is performed, the VRD indicator is green VRD, indicating that the VRD function remains active.

3) Where the VRD function is enabled when no welding is performed, the VRD indicator is red ☑, indicating that the VRD function is abnormal.

4) When the VRD function is enabled during welding, the VRD indicator is not lit.

Note: The VRD switch is located at "SW1-1" on the main control board (PK-530) in the machine.

q. Parameter adjustment knob A

1) In the MIG mode, when the "Synergic" function is disabled, it is possible to set the wire feed speed. When the "Synergic" function is enabled, press the knob to change and display parameters such as current, wire feed speed, sheet thickness, and spot welding time, and set these parameters.
2) In the MMA or lift-TIG mode, it is possible to set the current parameter.
3) Rotate the adjustment knob to adjust the parameters.
4) Rotate the knob clockwise to increase the parameter value, and counterclockwise to decrease it.
5) When the adjustment knob is rotated, the adjusted parameter is displayed in the parameter display area.

r. Parameter adjustment knob B

1) In the MIG mode, press the knob to change and display parameters such as voltage, welding inductance, burnback time, and saving channel, then set them.
2) In the MIG mode, press the knob to set the arc force current.
3) Rotate the adjustment knob to adjust the parameters.
4) Rotate the knob clockwise to increase the parameter value, and counterclockwise to decrease the parameter value;
5) When the adjustment knob is rotated, the adjusted parameter is displayed in the parameter display area.

6.2. Barcode display

1) When no welding is performed, press and hold the "Welding mode selection" key

and "Parameter adjustment knob A" for 3 seconds to display the machine's barcode in the display window.

2) Press any key or wait for 20 seconds to exit the machine's barcode display.
3) The barcode is displayed in nine data groups next to "Parameter display a" in the display window, which include "1.XY", "2.XY"....."9.XY", where X and Y are digits ranging from 0 to 9.
4) The barcode can be interpreted by referring to the following table:

Displayed data	Data meaning
1.XY	X and Y indicate the first and second numbers or letters of the barcode, respectively.
2.XY	XY indicates the third number or letter of the barcode, which ranges from 11 to 45. The corresponding barcode character is 1~Z, representing years.
3.XY	XY indicates the forth number or letter of the barcode, which ranges from 01 to 12. The corresponding barcode characters are 0~Z, representing months.
4.XY	XY indicates the fifth number or letter of the barcode, which ranges from 01 to 31. The corresponding barcode character is 0~V, representing dates.
5.XY	X and Y indicate the sixth and seventh numbers or letters of the barcode, respectively.
6.XY	X and Y indicate the eighth and ninth numbers or letters of the barcode, respectively.
7.XY	X and Y indicate the tenth and eleventh numbers or letters of the barcode, respectively.
8.XY	X and Y indicate the twentieth and twenty-first numbers or letters of the barcode, respectively.
9.XY	X and Y indicate the twenty-second and twenty-third numbers or letters of the barcode, respectively.

The numbers from the twelfth digit to nineteenth digit of the barcode are an internal number fixed by the company, which is displayed in the display window.

The machine's barcode can be obtained by reading and arranging the nine data groups, as well as skipping the numbers from the twelfth digit to the nineteenth digit of the barcode.

6.3. Resetting to the factory setting

1) When no welding is performed, press and hold the "Welding mode selection" key for 5 s to restore factory settings.
2) With the key pressed and held for 5 seconds, the display window counts down from 3. After the countdown ends, the cutter is reset to the factory setting. If you release the button midway to exit the countdown, the welder cannot be reset to factory settings.
3) The factory settings are as follows:

Option	Description	Reset parameter valuesMIG350C	Remarks
MIG parameters	Burnback time	200 ms
	Burnback voltage	13 V
	Induction	0
	Pre-flow time	0.1S
	Post-flow time	0.5S
	Welding voltage	19.0 V
	Wire feeding speed	5 m/min
	Crater voltage	19.0 V
	Crater wire feeding speed	5 m/min
MMA parameters	Arc force current	40A
	Hot start current	100A
	Welding current	130A
Lift-TIG parameters	TIG down-slope time	0.5S
	Welding current	100A

6.4. Welding engineer mode

This series of welders has a welding engineer mode, allowing users to set and change default back-end parameters and functions as follows:

1) With the welder started, press and hold "Parameter adjustment knob A" for 5 seconds.
2) Press the "Current parameter adjustment knob" for 2 seconds to start the 3 seconds countdown. After the countdown ends, the parameter serial number, e.g. "F01", is displayed next to "Parameter display a" in the display window. Display the set value corresponding to the current parameter serial number next to the "Parameter display b".
3) Rotate the "Parameter adjustment knob A" to select the parameter serial number or function that needs to be set in the back-end.
4) Rotate the "Parameter adjustment knob B" to change the set value corresponding to the displayed parameter serial number.
5) Press the "Parameter adjustment knob A" to save the setting of the current set parameter serial number.
6) After setting the parameter serial number's set value, press the "Welding mode selection" key to exit the engineer mode menu.
7) For the parameter serial number, function definition, and set value, refer to the table below.

Back-end parameter/function	S/N	Default parameters	Definition
Standby function response time setting	F01	10	Four parameters, including "0", "5", "10", and "15", can be set.1) "0" represents that the standby function is disabled, and the machine is not in a standby state.2) "5", "10", and "15" indicate that the standby function is enabled, and the machine enters the standby state after the time represented by the corresponding number (unit: minutes) elapses.
Pre-flow time setting	F02	MIG: 0.1	The MIG and lift-TIG parameters are set based on the "Welding mode" state after the welder enters the engineer mode.If the "Welding mode" is set to MIG, configure the MIG pre-flow time, which is adjustable within 0 to 2.0 seconds, with an accuracy of 0.1 seconds.2) If the "welding method" state is lift-TIG, set the lift-TIG pre-flow time, which is adjustable within 0 to 5.0 seconds, with an accuracy of 0.5 seconds. (The lift-TIG pre-flow time is unadjustable).
Post-flow time setting	F03	MIG: 0.5TIG: 5	The MIG and lift-TIG parameters are set based on the "Welding mode" state after the welder enters the engineer mode.1) If the "welding method" state is MIG, set the MIG post-flow time, which is adjustable within 0 to 5.0 seconds, with an accuracy of 0.5 seconds.2) If the "welding method" state is lift-TIG, set the lift-TIG post-flow time, which is adjustable within 0~10 s, with an accuracy of 1 s, expressed in seconds. The lift-TIG pre-flow time is unadjustable.
Lift-TIG Down-slope time setting	F04	0.5	Set the lift-TIG down-slope time, which is adjustable within 0 to 5 seconds, with an accuracy of 0.5 seconds. (This applies to the same series integrated machine model only).
Burnback voltage setting	F05	OFF	Set the MIG burnback time, which is adjustable within 10 to 20 seconds, with an accuracy of 0.1 second. The default value is 11.0 V for the aluminum-magnesium alloy, and 13.0 V for other materials.
Hot start current setting	F06	100	Set the MMA hot start current, which is adjustable within 0 to 200, with an accuracy of 1, expressed in ampere.
Slow wire feed speed setting	F07	OFF	Set the MIG slow wire feed speed, which is adjustable within 1.4- 18 m/minute, with an accuracy of 0.1 m/minute. Its default value differs for different processes, which is represented with OFF.
Welding Soft start time	F08	OFF	Set the welding soft start time, which is adjustable within 0-800 milliseconds, with an accuracy of 10 milliseconds.
Remote control mode setting	F09	0	The remote controller can be set to wired or wireless control mode, i.e., "0" or "1" can be set."0" indicates wireless remote control mode."1" indicates wired remote control mode.
Welding torch water cooling/air cooling selection	F10	/	Not available.
Smart Gas function switch	F11	0	The Smart Gas function switch can be set to "0" or "1".1) "0" indicates the smart gas switch is off.2) "1" indicates the smart gas switch is on.
Default display option of the synergic ammeter	F12	1	The default display option of the synergic ammeter can be set to "1", "2", or "3".1)"1" indicates that the current is displayed by default.2)"2" indicates that the speed is displayed by default.3)"3" indicates that the sheet thickness is displayed by default.

Note! The welder can enter the welding engineer mode in different "Welding mode" states, where the function definitions may vary! For example, when the current "welding mode" is MIG, the welder enters welding engineer mode. Thus, the set pre- and post-flow time parameters correspond to the pre- and post-flow times in MIG mode.

7. Welding function operation

Warning! Before turning on the power supply, make sure that the equipment is disconnected to the output. Otherwise, an unexpected arc may be started when the power is turned on. This can cause damage to the work piece and to personnel.

Warning! Be sure to wear appropriate protective equipment during welding or cutting operation. Arcs, spatter, smoke, and high temperatures produced in the welding process may cause injury to personnel.

Warning! After the power supply is turned off, the output voltage of the welder may continue for a period and then drop slowly. Please do not touch the conductive part of the output before the panel is extinguished.

7.1. MIG operation

Note! This model has an on-demand fan function, so the fan can stop working automatically if no welding is being done within a period after the welder is powered on, and then work again when the welding resumes.

7.1.1. Turn on the power switch.

The power switch is on the rear panel of the machine. After it is turned to the "ON" position, the panel indicator comes on. Then, the welder starts working normally.

7.1.2. Select the MIG mode,

(MIG mode: synergic startup)

1) Use the "Welding mode selection" key to select the MIG mode.
2) Use the corresponding function switch key to select welding type, wire diameter, operation method, and welding torch type.
3) Enable or disable the "Synergic" function.
4) Use "Parameter adjustment knob A" and "Parameter adjustment knob B" to set welding parameters.

7.1.3. Set welding parameters when the "synergic" function is turned off

(Wire feed speed and voltage setting)

(Inductance setting)

(burnback time setting)

1) Use "Parameter adjustment knob A" to set the "wire feed speed".
2) Use "Parameter adjustment knob B" to set the "Welding voltage".
3) Press "Parameter adjustment knob B" to switch and display parameters such as "Welding voltage", "Welding inductance", or "burnback time", and set them.
1) The parameters and range can be set on the panel as follow:

S/N	Description	Parameter option or range (input 400 VAC )
		MIG350C
1	Wire feed speed (m/min)	2~24
2	Welding voltage (V)	10~40
3	Induction	-10~10
4	burnback time (ms)	0~800

7.1.4. Set welding parameters when selecting the synergic mode

(Welding current setting)

(Wire feed speed setting)

(Sheet thickness setting)

1) Press "Parameter adjustment knob A" to switch and display parameters such as "Welding speed", "Wire feed speed", or "Sheet thickness". Set one parameter so that the other two parameters change accordingly.
2) The welder automatically matches the other welding parameters based on the built-in synergic expert parameter database to achieve an excellent welding effect.
3) Press "Parameter adjustment knob B" to switch and display parameters such as "Welding speed", "Wire feed speed", or "Sheet thickness", and tune them.

7.1.5. Use of the digital torch, spool torch, and push-pull torch (optional)

This series of inverter welders supports the conventional standard torch, support digital torch, spool torch, and push-pull torch. Simple parameter adjustment is possible via the keys on the digital torch or the adjusting knob on the spool torch.

1. digital torch

a. "Wire feed speed"/"welding current" up key
b. "Wire feed speed"/"welding current" down key

The "Wire feed speed"/"Welding current" adjustment key is used to adjust the "Wire feed speed" when the "Synergic" function is disabled, and the "Welding current" when the "Synergic" function is enabled.

c. "Welding voltage" up key d. "Welding voltage" down key

1) After the digital torch is connected to the welder, the "Standard torch" is selected.
2) When the remote control mode is enabled,

3) The key on the digital torch can be used to adjust the "Wire feed speed"/"Welding current", and "Welding voltage". For the information on how to operate on the panel, refer to sections 7.1.2 to 7.1.4.

Note! After the digital torch is used, the "Standard torch" should be selected. The adjusting knob on the operation panel and the adjusting key on the digital torch can be used at the same time to adjust parameters.

2. Spool torch

a. "Wire feed speed" adjustment potentiometer: Turn the potentiometer clockwise to increase the "Wire feed speed". Turn the potentiometer counterclockwise to decrease the "Wire feed speed" the "Wire feed speed".

(The spool torch is selected)

1) After the spool torch is connected to the welder, the "Spool torch" is selected.
2) When the remote control mode is enabled, the "Wire feed speed" is adjusted by the potentiometer of the spool torch.
3) When the remote control mode is disabled, the "Wire feed speed" is adjusted via the "Parameter adjustment knob A" on the operation panel of the welder.
4) For the information on how to operate on the panel, refer to sections 7.1.2 to 7.1.4.
Note! When the spool torch is selected, the "Synergic" function is unavailable. If no potentiometer is provided on the spool torch, the "Spool torch mode" is selected, and the remote control mode is enabled, the current cannot be adjusted.

3. Push-pull torch

The push-pull torch cannot be used to adjust parameters.

(The push-pull torch with a high-definition digital display is selected) The push-pull torch can be selected when the welder is in either "Non-synergic" or "Synergic" MIG mode.

7.1.6. Start welding

Brief description of MIG operation modes such as "2T", "4T", "Repeated crater welding", and "Spot welding"

"2T" operation mode

Step 1: Press the welding torch trigger and start welding.

Step 2: Release the welding torch trigger and stop welding.

"Repeated crater welding" operation mode

Step 1: Press the welding torch trigger and start welding

Step 2: Release the welding torch trigger for the first time and continue welding.

Step 3: Press the welding torch trigger for the second time and keep welding.

Step 4: Release the welding torch trigger for the second time and stop welding.

Step 5: If no action is performed within 2 seconds after the welding torch trigger is released, stop welding.

Step 6: If the torch trigger is pressed within 2 seconds, perform the second crater welding process.

"4T" operation mode

Step 1: Press the welding torch trigger for the first time and start welding.

Step 2: Release the welding torch trigger for the first time and continue welding.

Step 3: Press the welding torch trigger for the second time and keep welding.

Step 4: Release the welding torch trigger for the second time and stop welding.

"Spot welding" operation mode

In MIG mode, when the welding torch switch is pressed, the arc is successfully initiated and after the built-in hot arc-start time, spot welding timing begins. When the time reaches the set value of "spot welding time", the welding automatically stops. It will not start the second arc welding until the torch switch is released and pressed again. If the torch switch is released before reaching the set value of spot welding time, the welding will stop immediately.

Time sequence diagram of MIG operation modes such as "2T", "4T", "Repeated crater welding", and "Spot welding"

Mode	Diagram
2T
4T
Repeat
Spot welding

7.1.7. Turn off the power supply after welding.

The power switch is located at the rear panel of the machine. With the power switch turned to the "OFF" position, the panel indicator comes off shortly. Then, the welder stops working.

7.2. MMA operation

7.2.1. Turn on the power switch.

(Same as 7.1.1)

7.2.2. Select the operation mode

(MMA current setting)

(Arc force setting)

Use the "Welding mode selection" key to select the MMA mode.

7.2.3 MMA parameter setting

1) Use "Parameter adjustment knob A" to set the "welding current".
2) Use the "Parameter adjustment knob B" to adjust the "arc force current".
The welding current is set by the user based on welding electrode type, diameter, and its

process requirements. Refer to the following table:

S/N	Welding electrode diameter (mm)	Welding electrode diameter (mm)	Welding current (A)
1	1.6	1.6	25~40
2	2.0~3.2	2.0	40~65
		2.5	50~80
		3.2	100~130
3	3.2~4.0	3.2	100~130
		4.0	160~210
4	≥4	5.0	200~270
		6.0	220~300

Note! The operator should select welding functions that meet welding requirements. During the welding process, select appropriate welding parameters according to actual conditions. If the selected method is not appropriate, the arc may be erratic, thus resulting in spatter or electrode sticking.

Arc force current: The arc force current should be set based on electrode diameter, current settings, and process requirements. High arc force current settings lead to faster metal transfer and non-sticking electrode, but with some spatter. Lower arc force current settings provide a smooth arc with less spatter and good weld seam formation, but sometimes result in a weak arc or electrode sticking. Especially, the arc force current shall be increased when the welding is conducted with a large welding electrode at a low current. Generally, the arc force current should be 30\~50A.

Hot start current helps the arc striking, and reduces the sticking of welding electrode and workpiece during arc striking. The parameter is set to 100 A.

S/N	Description	"Arc force" and "Hot start current" setting
		MIG350C
1	Arc force	0~100A
2	Hot start current	It defaults to 100 A (adjustable within 0~200A in the user menu)

In the DC MMA mode, the heat distribution between the positive and negative poles of the welding arc differs, so the DC power supply is connected by DECP or DECN method. DECN refers to connecting the electrode to the negative pole of the power supply, and the workpiece to the positive pole. This method allows the workpiece to receive more heat at high temperature to form a deep molten weld pool and achieve full penetration, making it suitable for welding thick parts. DECP refers to connecting the electrode to the positive pole of the power supply, and the workpiece to the negative pole. This method allows the

workpiece to receive less heat at lower temperature to form a Molten weld pool shallow molten weld pool and not to achieve full penetration, which makes it suitable for welding thin parts.

7.2.4. Start welding

Note! This series of welder has an anti-sticking function by default.

VRD function enabled: When the voltage of the welder output port remains continuously below 10-12 V during the welding process for 2 seconds, the welder enters the anti-sticking state. Subsequently, the output should be shut off to prevent the electrode from being short-circuited to the workpiece for an extended period, which could result in damage to the electrode due to the electrode overheating.

VRD function disabled: When the voltage of the welder output port remains continuously below 10-12 V during the welding process for 2 seconds, the welder enters an anti-sticking state. Subsequently, the output current drops to approx. 20 A to prevent the electrode from being short-circuited to the workpiece for an extended period, which could result in damage to the electrode due to the electrode overheating.

7.2.5. Turn off the power supply after welding

(Same as 7.1.7)

The power switch is located at the rear panel of the machine. With the power switch turned to the "OFF" position, the panel indicator comes off shortly. Then, the welder stops working.

7.3. Lift-TIG operation

7.3.1. Turn on the power switch

(Same as 7.1.1)

7.3.2. Select the Lift-TIG mode

(Lift-TIG mode)

Use the "Welding mode selection" key to select the lift-TIG mode.

7.3.3. Set welding parameters

Use "Parameter adjustment knob A" to set the "welding current"

Select the appropriate welding current, tungsten electrode, and shielding gas flow based on the actual conditions. For specific details, refer to the following data.

Stainless steel sheet----selection of manual TIG welding parameters

Tungsten electrode diameter (mm)	Stainless steel panel thickness (mm)	Maximum current (A)	Maximum argon gas flow (/min)
1~2	1~3	50	5
		50~80	6
2~4	3~6	80~120	7
		121~160	8
		161~200	9
		201~300	10

7.3.4. Start welding

Brief description of argon arc welding operation modes such as "2T", "4T", and "4T"

"2T" operation mode

Step 1: Press the welding torch trigger and start welding.

Step 2: Release the welding torch trigger and stop welding.

"4T" operation mode

Step 1: Press the welding torch trigger for the first time and start welding.

Step 2: Release the welding torch trigger for the first time and continue welding.

Step 3: Press the welding torch trigger for the second time and keep welding.

Step 4: Release the welding torch trigger for the second time and stop welding.

(Lift-TIG process)

Note! If the short-circuit time exceeds 2 seconds during arc striking, the welder will shut off the output current. Then, the welding torch should be lifted to make the tungsten needle short-circuited to the workpiece again for arc striking.

Note! If the tungsten needle is short-circuited to the workpiece during welding, the welder should immediately decrease the output current. If the short-circuit duration exceeds 2 seconds, the welder will shut off the output current. Then, the welding torch should be lifted for arc striking again.

7.3.5. Turn off the power supply after welding

(Same as 7.1.7)

7.4. Standby

(Standby state interface)

1) Enter the standby state: In the MIG or lift-TIG mode, the welder will enter the standby state if no welding or panel operation is performed for a long time. Then, the welder will turn off the operation panel display window and enter the standby state. The default time before entering the standby state is 10 minutes.
2) Exit the standby state: In the standby state, operate the welder to exit the standby state. The operation includes entering the welding state, pressing the welding torch trigger, pressing or turning any key or knob on the operation panel, and operating the paired and effective remote controller.
3) In consideration of the safety and convenience in use for the welder, the welder will not enter the standby state in the MMA mode.

7.5. Function and use of wireless or remote controller

1) If the welder supports the remote control function and is provided with remote control equipment and spare parts, the user can use the handheld remote controller or foot pedal to perform the simple welding parameter adjustment after the basic setting on the operation panel of the welder.

2) For specific content, see the instructions for remote controller.

7.6. Software upgrading function operation

1) Enter the software upgrading mode: The welder will check whether a USB flash drive is plugged into the welder within 1.5 seconds after the welder startup. If a U flash drive is identified, the current digital tube displays "USB", and the remaining indicators are off, and the welder enters the software upgrading process. If no USB flash drive is identified, the welder enters the normal working interface.
2) Software upgrading process: Press the orange "Welding mode" key within 5 seconds. This allows the system to automatically identify the ARM upgrading files and initiate the upgrade process, during which the current digital tube displays the size of the remaining upgrading files. After a successful upgrading, the current digital tube displays "OK" for 2 seconds before the welder automatically enters the working interface. If the welder fails to identify any upgrading files or the orange "Welding mode" key is not pressed within 5 seconds, the welder will automatically enter the working interface. When the USB flash drive contains DSP and ARM upgrading files matching the welder, the ARM software will be upgraded first, followed by the DSP software.

Do not unplug the USB flash drive during the upgrading process to avoid upgrade failure or other faults!

8. Maintenance and care

Warning! The following operations must be performed by the operator with professional knowledge of electricity and safety. The operator should have valid qualification certificates that prove his/her capability and knowledge background.

Warning! Please make sure that the input cable of the welder is disconnected from the power grid before opening the case.

1) Regularly check the internal circuit connection of the welder to confirm that the circuit connections are correct, and the connectors are secure (especially for inserted connectors or components).

If rust or looseness is found, sandpaper should be used to remove the rust layer or oxide film, then reconnect and tighten it firmly.

2) Do not put hands, hair, tools, etc. near the live devices in the machine during maintenance, such as fans, to avoid personal injury or damage to the machine.

Dry and clean compressed air should be used to blow off the dust regularly. If the welder is used in an environment with heavy smoke and severe air pollution, it should be dedusted monthly.

The compressed air pressure should remain at a reasonable level to avoid damage to the small components in the welder.

Avoid water or moisture entering the interior of the welder. If this condition occurs, the interior of the welder should be dried. Subsequently, use a megohmmeter to measure the insulation condition of the welder (including between the connection nodes and between the connection point and the enclosure).

Do not proceed with welding unless confirming that there is no abnormal condition.

5) Regularly inspect all cable insulation layers of the welder for damage. If damaged, repair or replace them as necessary.

6) Welder not used for a long time should be placed back into the original packaging box and stored in a dry environment.

7) Regularly checking the power switch, grounding device, welding torch, and coupling output device is required. If rusted, loosened, or connected improperly, remove the rust, or tighten the loosened and improperly connected parts.

9. Troubleshooting

Warning! The following operations must be performed by the operator with professional knowledge of electricity and safety. The operator should have valid qualification certificates that prove his/her capability and knowledge background. Please make sure that the input cable of the welder is disconnected from the power grid before opening the case.

Warning! After some models are disconnected from the input power supply, the capacitor in the machine may have a high voltage within a period. Please discharge before testing.

9.1. Troubleshooting of common problems

Warning: The welder may be damaged during use. After you confirm that the welder is damaged, the welder should be repaired promptly. The welder can be repaired only by the personnel who have received professional training. Do not have the welder repaired by non-professional personnel; otherwise, the fault scope may be further extended, or more valuable parts may be damaged.

The faults listed above may be related to the accessories, gas, environmental factors, and power supply you use. Please try to improve the working environment to avoid these faults.

Troubleshooting of common problems in MIG mode

Symptoms		Reasons	Solutions
The fan does not turn or the speed is abnormal after power-on		The ambient temperature is too low or the fan is damaged.	When the temperature is too low, allow the machine to work for a period of time until the temperature in the machine increases and the fan rotates normally. If the fan still does not work, replace it with a new one.
MIG	The welder has no current output and does not display any fault code indication.· After pressing the welding torch trigger to supply gas, there is current output but no wire feeding.	· The welding circuit has failed. · The internal device of the welder has failed.· The wire feeder is stuck. · The wire feeder motor has failed. · The internal control board of the welder has failed.	· Check the welding circuit and repair it. · Contact the customer-service personnel and seek professional assistance.· Loosen the wire feeder. · Replace the wire feeder motor. · Replace the control board.
	The welding current is unstable. The current fluctuates frequently.	· The torque knob of the wire feed mechanism is not properly adjusted. · The wire feed roller does not match the welding wire. · The contact tip is seriously worn out. · The liner of the welding torch is seriously worn out. · The welding wire quality is not good.	· The torque knob of the wire feed mechanism is properly adjusted. · The wire feed roller corresponds to the welding wire. · Replace the contact tip of the welding torch. · Replace the liner of the welding torch. · Replace the welding wire that meets quality requirements.
Other faults			Please contact the maintenance personnel of Shenzhen JASIC Technology Co., Ltd.

Troubleshooting of common problems in MMA mode

Symptoms		Reasons	Solutions
The fan does not turn or the speed is abnormal after power-on		The ambient temperature is too low or the fan is damaged.	When the temperature is too low, allow the machine to work for a period of time until the temperature in the machine increases and the fan rotates normally. If the fan still does not work, replace it with a new one.
MMA	No normal arc can be initiated.	The power cable is not connected properly.	Connect the power cable properly.
	Electrode sticking.	The arc force is weak.	Increase the arc force current.
	The electrode holder is hot.	The rated current of the electrode holder is too low.	Use an electrode holder that can handle a higher current.
	The arc is prone to interruption.	The mains voltage is low.	The welder is used after the mains power resumes normal operation.

Other faults

Please contact the maintenance personnel of Shenzhen JASIC Technology Co., Ltd.

Troubleshooting of common problems in lift-TIG mode

Symptoms		Reasons	Solutions
The fan does not turn or the speed is abnormal after power-on		The ambient temperature is too low or the fan is damaged.	When the temperature is too low, allow the machine to work for a period of time until the temperature in the machine increases and the fan rotates normally. If the fan still does not work, replace it with a new one.
Argon arc welding	No current output when the torch trigger is pressed.	Some Lift-TIG modes allow welding to end when the torch trigger is pressed.	Release the torch trigger, then restart the operation.
		The welding circuit is open.	Check the welding circuit and reconnect it.
	Rapid tungsten electrode burnout.	The welding torch and ground cable are connected with polarity reversed.	Switch two plug positions.
	The welding spot is blackened.	The welding spots are oxidized due to being not effectively protected.	· Ensure that the valve of argon cylinder is open and there is enough pressure. Generally, if the cylinder pressure is lower than 0.5 MPa, it must be refilled. · Check whether the argon flow rate is normal. You can select the flow rate according to the welding current condition, but too low a flow rate may lead to insufficient shielding gas to cover all weld joints. It is suggested that the argon flow rate be no less than 5L/min, no matter how small the current. · Check whether the gas path is leaking, or whether the gas purity is too low. · Check whether there is strong ambient air flow in the environment.
	Hard to start arc The arc is prone to interruption.	The tungsten electrode does not meet quality requirements or has undergone serious oxidation.	· Replace the original tungsten electrode with a higher-quality one. · Grind off the tungsten oxide layer.
	Unstable current during welding.	The voltage of the power grid fluctuates seriously or the joint contact with the power grid is poor.Serious interference from other electrical equipment.	· Check whether the power grid is normal and connect the power supply properly.· Connect the welder to the power cable that is not connected with the equipment that may cause serious interference.
Other faults			Please contact the maintenance personnel of Shenzhen JASIC Technology Co., Ltd.

9.2. Alarm and solutions

Error code	Categories	Possible causes	Countermeasures
E10	Primary side overcurrent protection	The welder continuously outputs the maximum current.	Restart the welder. If it is still in overcurrent protection, contact the after-sales department of the company.
E20	Wire feed overcurrent protection	The wire feeder resistance is too big	Check whether the welding torch is coiled or bent with a small diameter, if the welding wire is stuck onto the wire reel or wire feed system, and whether the wire feed mechanism is blocked by excessive foreign bodies. If the overcurrent problem persists after troubleshooting, contact the company's after-sales service.
E30	Phase loss alarm	The three-phase power cable is not connected properly	Connect the three-phase power cable, so the welder can operate once the mains voltage returns to normal. If the alarm persists after troubleshooting, contact the company's after-sales service.
E31	Under-voltage protection	The input mains voltage is too low	Turn off the machine and restart it. If this alarm cannot be eliminated and the mains voltage remains too low, check the power mains voltage and wait for the grid to be normal before welding. If the mains voltage is normal and the alarm persists, contact professional maintenance personnel.
E32	Overvoltage protection	The input mains voltage is too high	Turn off the machine and restart it. If the alarm cannot be eliminated and the mains voltage remains too high, check the power mains voltage and wait for the grid to be normal before welding. If the mains voltage is normal and the alarm persists, contact professional maintenance personnel.
E34	Abnormal drive voltage	Under-voltage drive	Turn off the machine and restart it. If the alarm cannot be eliminated, contact professional maintenance personnel.
E50	Abnormal communication between the LCD board and the control board	Fault in communication between the LCD and the control board	After the shutdown, check that the connecting cable between the LCD and the control board is normal. If the alarm still exists after troubleshooting, contact the company's after-sales service. (The alarm code is reserved for welder with the LCD function)
E57	Alarm for abnormal communication with the control board	Fault in communication between DSP andARM chip	Replace the main control board (PK-530).
E60	Overheat alarm	The temperature of the inverter IGBT is too high	Do not shut down the welder but wait for a while. After the over-heat indicator comes off, the welding can resume.
E61	Overheat alarm	The 3-phase rectifier temperature is too high.	Do not shut down the welder but wait for a while. After the over-heat indicator comes off, the welding can resume.
	VRD abnormality.	The VRD function has failed.	When the welding is finished, the VRD indicator comes on red immediately and then green, indicating that the welder is normal. If the VRD indicator remains red for a long time after the welding is finished, shut down the welder and then restart it; if doing so cannot eliminate the problem, contact professional maintenance personnel.

Note! After applying the above countermeasures, the alarm still persists or reappears after lifting. Please contact professional maintenance personnel.

9.3. Common problems in MIG mode

Phenomena shown in the following table may occur if the welding conditions are inappropriate.

Table 9.3. Common problems in MIG mode

Inappropriate welding conditions.	Impact	Inappropriate welding conditions.	Impact
The wire stick-out length is too long.	The arc is erratic, resulting in spattering.	The arc voltage is too high.	The arc is too long, and more fusing spatters are produced.
	The weld pass is narrowed.		The weld pass has been widened.
	The gas shielding effect becomes worse, resulting in blistering.		The arc is erratic.
The wire stick-out length is too short.	The nozzle is blocked, which results in blisters.	The arc voltage is too low.	Arc interruption, wire blast, or spatter may occur.
	The line of sight is affected, making it difficult to observe the molten weld pool.		The weld pass is narrowed, and the welding wire cannot be fused.
	The thin base metal is prone to penetration.		The excess weld metal increases, causing the weld seam to become raised.
The welding current is too high.	The spatter is more severe.	The welding speed is too high.	The weld pass is narrowed.
	The penetration is increased and height of welding seam raises, making poor welding seam.		The penetration and height of welding seam are decreased.
	The base metal is prone to burn through.
Wire stick-out length: refers to the distance from the end of the welding wire to the end of the contact tip.

10. Packaging, Transportation, Storage, and Waste Disposal

10.1. Transportation requirements

In the process of handling the equipment, it should be handled with care, and should not be dropped or severely impacted. Avoid moisture and rain during transportation.

10.2. Storage conditions

Storage temperature: -25°C - +50°C

Storage humidity: relative humidity ≤ 90%

Storage period: 12 months

Storage site: indoors with no corrosive gas and air circulation

10.3. Waste disposal

Do not dispose of the equipment with normal waste.

The electric equipment that has reached the end of its service life by referring to the Directive 2012/19/EU on Waste Electrical and Electronic Equipment (WEEE), the Directive 2011/65/EU on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment, and national laws must be collected separately and transported to the appropriate environmental protection and recovery agency. The equipment user must be sent to the local recycling center according to the instructions of the local government. Following these regulations helps protect the environment and human health.

11. After-sales service

11.1. Warranty card

Each welder is provided with a warranty card, please fill it in carefully.

Read and keep the warranty card carefully.

11.2. Repair

Please conduct preliminary troubleshooting or keep a record based on the troubleshooting contents for common problems. To repair or replace a device, contact your local dealer. Please use accessories or consumables provided by Shenzhen JASIC Technology Co., Ltd. The warranty of this machine is based on the date of sale stated on the warranty card or sales contract. Any machine failure caused by unconventional or unreasonable use is not covered by the warranty, and such maintenance requires charges.

Appendixes

Appendix 1: Wiring diagram of the machine

Machine wiring diagram--MIG350C

Appendix 2: Common spare parts list

Common spare parts list--MIG350C

List of spare parts

S/N	Material code	Description	Qua ntity	S/N	Material code	Description	Quantity
2	51007602	Display panel	1	40	51005746	Square capacitor	1
5	51002822	Knob	2	41	51006071	Rectifier bridge	1
8	51007573	Bluetooth receiver module	1	42	51007719	Main control board	1
9	51002374	Quick socket	2	43	51007656	EMC board	1
10	51007545	Nine-pin aviation socket and cable	1	44	51007699	Power board	1
15	51007574	Mobile phone APP receiver module	1	45	51007041	Fan and cable	1
17	51007544	Hall sensor and cable	1	48	51007537	Solenoid valve and cable	1
21	51007847	Main transformer	1	50	51007571	Type-C module	1
24	51007720	Reactor	1	55	10108733	Power switch	1
32	51007575	Current transformer board	1	65	10109009	Wire feeder	1
33	51007663	Inverter board	1	71	51007654	Secondary rectifier board	2
34	51000797	IGBT thermistor	1	75	51001033	Wire feed compartment light board	1
39	51000794	Rectifier bridge thermistor	1

Appendix 3: Package and spare parts

General packaging

S/N	Description	Unit	Quantity
1	Product certificate	Piece	1
2	Certificate	Piece	1
3	Warranty card	Piece	1
4	Desiccant	Pack	2
5	Accessories	Pack	1
6	Welding machine	Set	1

MIG350C standard spare parts

S/N	Classification	Description	Material code	Unit	Quantity
1	Earth clamp	500A-35 mm2-DKJ35-50(2.5M)	10077958	Piece	1
2	MIG torch	MB-36(3M)	10019704	Piece	1

This product is being constantly improved. Your understanding of any discrepancies with this manual will be greatly appreciated.

JASIC® | Passionate About Your Welding

SHENZHEN JASIC TECHNOLOGY CO., LTD.

Address: No. 3, Qinglan 1st Road, Pingshan District, Shenzhen, Guangdong, China

Postcode: 518118

Tel: [phone]

Fax: [phone]

Website: www.jasictech.com

E-mail: [e-mail]

@JASICTechWelding

JASIC Technology Co., Ltd.

@jasictech_official