Jasic MIG 400S User Manual (English)

Questions and Answers:

K
Katherine MckeeJul 30, 2025
Why is my Jasic MIG 400S's welding current unstable?
- P
  phillipsandrewJul 30, 2025
  Unstable welding current in your Jasic Welding System can stem from several factors: * The pressure arm on the wire feeder may not be properly adjusted; adjust it to achieve the correct pressure. * The drive roll may not match the wire size; ensure they are compatible. * A badly worn contact tip or wire-feeding tube on the welding torch; consider replacing them. * Poor quality welding wire; replace it with a higher quality wire.
D
Dr. Robert LevyAug 3, 2025
What to do if there is no output current when pushing the torch trigger on my Jasic Welding System?
- J
  Jimmy WatsonAug 3, 2025
  If your Jasic Welding System has gas output and the wire feeder works when the torch trigger is pushed, but there's no output current, and the protection LED is off, check these: * Ensure the earth cable is securely connected to the workpiece; reconnect if needed. * Verify the wire feeder cable is properly connected; reconnect it if necessary. * The wire feeder or welding torch may have failed; consider repairing them.
S
stonejesseAug 8, 2025
What to do if my Jasic MIG 400S Welding System electrode holder becomes very hot?
- M
  Matthew LeeAug 8, 2025
  If the electrode holder of your Jasic Welding System becomes very hot, it might be because the rated current of the electrode holder is lower than the actual working current. Replace it with one that has a higher rated current.
M
Megan MelendezAug 12, 2025
What to do if my Jasic Welding System has no no-load voltage?
- T
  Tiffany CruzAug 12, 2025
  If your Jasic Welding System has no no-load voltage, it could be due to: * Mains voltage being too low; wait for the voltage to recover before welding. * Phase failure; solve the phase failure problem.
B
Benjamin LoweAug 16, 2025
What to do if my Jasic MIG 400S has output current but the wire feeder does not work?
- A
  Anne DunnAug 16, 2025
  If your Jasic Welding System has output current when pushing the torch trigger to feed gas, but the wire feeder isn't working, consider the following: * The control cable of the wire feeder might be broken; get it repaired or replaced. * The wire feeder could be clogged; unclog it. * The wire feeder may have failed; repair it. * The control PCB or wire-feeder power PCB inside the machine may have failed; replace it.
R
Richard WigginsAug 20, 2025
What to do if my Jasic MIG 400S has no response when pushing the torch trigger?
- C
  Cody HicksAug 20, 2025
  If your Jasic Welding System shows no response when pushing the torch trigger and the protection LED is off, check: * The welding torch connection to the wire feeder; reconnect if it's loose. * The control cable connection between the wire feeder and the welding power supply; reconnect if necessary. * The torch trigger itself; repair or replace the welding torch if the trigger fails.
W
whiterobinAug 25, 2025
What to do if my Jasic MIG 400S Welding System has no no-load voltage and the overload LED is on?
- B
  Blake GonzalesAug 26, 2025
  If your Jasic Welding System has no no-load voltage and the overload LED is on, it indicates overload protection. The system should recover automatically after the welding machine cools down.

Jasic MIG 400S Specifications

General

Brand	Jasic
Model	MIG 400S
Category	Welding System
Language	English

Summary

Your New Product

Safety Precautions

Prevention Against Electric Shock

Details safety measures to prevent electric shock during operation.

Safety Against Fumes and Welding Gases

Covers precautions related to hazardous fumes and gases generated during welding.

Prevention Against Burns and Radiation

Protects against intense arc rays and heat, preventing burns and radiation exposure.

Protection Against Noise

Advises on wearing ear protection to safeguard hearing from noise.

Protection From Moving Parts

Warns to stay clear of moving components like fans to prevent injury.

Precautions Against Fire and Explosion

Outlines measures to prevent fires and explosions from sparks, hot metal, and flammable materials.

Risks Due to Magnetic Fields

Highlights potential risks of magnetic fields to medical equipment and pacemakers.

RF Declaration

Declaration regarding electromagnetic compatibility (EMC) for industrial use.

LF Declaration

Declaration regarding power supply quality and network connection requirements.

Materials and Their Disposal

Information on materials used and environmentally sound disposal procedures.

Handling of Compressed Gas Cylinders and Regulators

Safety guidelines for handling compressed gas cylinders and regulators.

Product Overview

Technical Data

Controls

Front View Controls

Identifies and describes controls located on the front panel of the welding machine.

Rear View Controls

Details the controls and features visible on the rear panel of the welding machine.

Wire Feed Control

Explains the controls related to the wire feeder system, including knobs and switches.

Installation

Unpacking and Initial Checks

Instructions for unpacking the machine and checking for any signs of damage.

Machine Location Requirements

Guidance on selecting a suitable position and environment for operating the machine.

Input Power Connection

Details on connecting the machine to the appropriate power supply, emphasizing safety.

Output Connections and Polarity

Instructions for connecting welding leads and understanding electrode polarity for MMA and TIG.

MIG Welding Setup

Steps for setting up MIG welding, including torch connection and wire spool installation.

Wire Feeder Setup

Guidance on connecting the wire feeder, gas cylinder, and threading the wire.

Operation

MMA Welding Operation

Instructions for setting up and performing MMA welding, including amperage and polarity.

MIG/MAG Welding Operation

Detailed steps for MIG/MAG welding, covering gas flow, arc adjustment, and settings.

Gas Selection for Welding

Explains the types of shielding gases (MIG, MAG, CO2) and their applications.

MIG/MAG Welding Settings

Covers setting welding current, wire speed, stick-out, and shield gas flow for MIG/MAG.

Maintenance and Troubleshooting

Maintenance Schedule

Details daily, monthly, and yearly maintenance tasks for the welding machine.

Troubleshooting Guide

Provides solutions for common malfunctions and error indicators.

Protection LED Warnings

Explains the meaning of Power LED and Overload LED warnings.

Parts List

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Jasic MIG 400S User Manual

Table of Contents

Questions and Answers:

Jasic MIG 400S Specifications

Summary

Your New Product

Safety Precautions

Prevention Against Electric Shock

Safety Against Fumes and Welding Gases

Prevention Against Burns and Radiation

Protection Against Noise

Protection From Moving Parts

Precautions Against Fire and Explosion

Risks Due to Magnetic Fields

RF Declaration

LF Declaration

Materials and Their Disposal

Handling of Compressed Gas Cylinders and Regulators

Product Overview

Technical Data

Controls

Front View Controls

Rear View Controls

Wire Feed Control

Installation

Unpacking and Initial Checks

Machine Location Requirements

Input Power Connection

Output Connections and Polarity

MIG Welding Setup

Wire Feeder Setup

Operation

MMA Welding Operation

MIG/MAG Welding Operation

Gas Selection for Welding

MIG/MAG Welding Settings

Maintenance and Troubleshooting

Maintenance Schedule

Troubleshooting Guide

Protection LED Warnings

Parts List

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