Air Liquide M 172 - User Manual

Questions and Answers

D
David GutierrezAug 6, 2025
Why are my Air Liquide M 172 Welding System welds porous or spongy?
- K
  Kathryn Diaz MDAug 6, 2025
  Porous or spongy welds in your Air Liquide Welding System can be caused by several issues. First, ensure you have an adequate gas supply and pressure. If there are drafts in your welding area, use a screen and increase gas delivery pressure if needed. Clogged holes in the gas diffuser can also cause this issue, so clear them with compressed air. Check for gas leaks in the supply hoses and replace any faulty components. Additionally, a blocked solenoid valve can be the culprit; check its operation by removing the hose connecting the pressure regulator to the power source. Finally, poor quality gas or wire can lead to porous welds, so ensure your gas is extra-dry and consider changing the cylinder or using a different type of wire.
L
Leonard DaviesAug 11, 2025
Why is my Air Liquide Welding System welding power reduced?
- L
  Leslie WoodAug 11, 2025
  Reduced welding power in your Air Liquide Welding System can stem from several factors. Ensure the ground cable is properly connected and that the ground clamps are firmly fixed to the workpiece. Check for detached or loose connections on the switches, tightening or replacing them as necessary. A faulty contactor could also be the cause; inspect the state of the contacts and the mechanical efficiency of the contactor. Lastly, a faulty rectifier might be the issue; visually check for signs of burn-out and replace the rectifier if necessary.
F
Felicia CarrilloAug 16, 2025
What to do if pressing the torch trigger on my Air Liquide Welding System produces no result?
- K
  Kenneth SmithAug 16, 2025
  If pressing the torch trigger on your Air Liquide Welding System yields no result, consider these potential causes. It could be a faulty torch trigger, disconnected, or broken control cables; remove the torch connection plug and short circuit the poles to see if the machine operates, if so, check the cables and the torch trigger. A blown fuse could also be the reason; replace it with one of the same rating. Another possibility is a faulty power switch; clean it with compressed air, ensure the wires are tightly secured, and replace the switch if needed. Lastly, a faulty electronic circuit could be the issue; in this case, replace the circuit.
S
Stephanie SawyerAug 21, 2025
How to fix irregular wire feed on Air Liquide M 172 Welding System?
- N
  Nathan SmithAug 21, 2025
  Irregular wire feed in your Air Liquide Welding System can be due to several reasons. Check for insufficient spring pressure and tighten the pressure assembly knob. A blocked wire-guide can also cause this, so replace it if necessary. If the wire groove is unsuitable for the wire or excessively worn, turn the roller over or change it. Excessive braking on the coil could be another cause; loosen the brake using the adjusting screw. Finally, oxidized, poorly wound, or poor-quality wire with tangled coils can lead to irregular feeding. Remedy this by removing defective coils; if the problem persists, change the wire reel.
J
Jessica MarshAug 26, 2025
Why no functions operate on my Air Liquide M 172?
- M
  Maureen McdonaldAug 27, 2025
  If no functions operate on your Air Liquide Welding System, it could be due to a faulty power cord with disconnected phases; check and remedy this. Alternatively, a blown fuse could be the cause; replace it.
V
Victoria RushAug 31, 2025
What causes the gas supply to not switch off on Air Liquide M 172?
- T
  Tammy BassAug 31, 2025
  If the gas supply on your Air Liquide Welding System does not switch off, it is likely due to a worn or dirty solenoid valve. Replace the solenoid.

Summary

Safety Precautions

Installation of Equipment

Instructions for safe installation of welding equipment, covering checks, grounding, and placement.

Personal Protection

Essential personal protective equipment and safety measures for welding operators.

Fire and Explosion Prevention

Measures to prevent fire and explosion hazards, including flammable materials and gas cylinder safety.

Metal Fume Hazards

Information on hazards from metal fumes and gases, and necessary ventilation and respiratory protection.

Transporting the Power Source

Guidelines for safely moving and transporting the welding power source unit.

Magnetic Fields Can Affect Pacemakers

Warnings for pacemaker wearers regarding magnetic fields generated during welding.

H.F. Radiation Can Cause Injury

Information on potential injury from High Frequency (HF) radiation emissions and installation precautions.

Arc Welding Can Cause Interference

How arc welding can interfere with electronic equipment and methods to mitigate interference.

Welding and the Effects of Low Frequency and Magnetic Fields

Techniques to reduce electromagnetic fields generated by welding current through cable management.

Principal Safety Standards

List of key safety standards and regulations relevant to welding and cutting operations.

Specifications and Description

Specifications

Detailed technical specifications for the M 132 and M 172 welding machines.

Description

Overview of the M 132 and M 172 welding machines, their features and applications.

Comes Complete With

List of standard accessories and components included with the welding machines.

Installation

Connecting to Main Supply

Instructions for connecting the welding unit to the appropriate main power supply.

Selecting a Location

Guidelines for choosing a suitable, safe, and well-ventilated location for the welding equipment.

Changing Polarity

Procedures for changing the welding polarity between DCEN (Straight) and DCEP (Reverse).

Installing Welding Gun

Step-by-step instructions for properly installing the welding gun assembly.

Installing Wire Spool and Adjusting Hub Tension

How to install a wire spool and adjust the hub tension for correct wire feeding.

Installing the Wire into the Welding Gun

Process for feeding the welding wire through the wire feeder and into the welding gun.

Installing SG 185 Spool Gun

Detailed steps for connecting the optional SG 185 spool gun to the welding machine.

Operation

Front Panel Controls

Explanation and function of all controls located on the front panel of the welding machine.

Back Panel Controls

Identification and purpose of the controls and connections found on the back panel.

Maintenance and Troubleshooting

Torch Maintenance

Procedures for maintaining the welding torch, including contact tip and gas diffuser.

Replacing the Gun Liner

Step-by-step guide for replacing the gun liner within the welding torch assembly.

Troubleshooting

Common issues, their possible causes, and recommended solutions for troubleshooting.

Duty Cycle and Overheating

Volt-Amperes Curves

Electrical Diagram

Spare Parts List

Warranty Policy

Air Liquide M 172 Specifications

General

Brand	Air Liquide
Model	M 172
Category	Welding System
Language	English

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Air Liquide M 172 - User Manual

Table of Contents

Questions and Answers

Summary

Safety Precautions

Installation of Equipment

Personal Protection

Fire and Explosion Prevention

Metal Fume Hazards

Transporting the Power Source

Magnetic Fields Can Affect Pacemakers

H.F. Radiation Can Cause Injury

Arc Welding Can Cause Interference

Welding and the Effects of Low Frequency and Magnetic Fields

Principal Safety Standards

Specifications and Description

Specifications

Description

Comes Complete With

Installation

Connecting to Main Supply

Selecting a Location

Changing Polarity

Installing Welding Gun

Installing Wire Spool and Adjusting Hub Tension

Installing the Wire into the Welding Gun

Installing SG 185 Spool Gun

Operation

Front Panel Controls

Back Panel Controls

Maintenance and Troubleshooting

Torch Maintenance

Replacing the Gun Liner

Troubleshooting

Duty Cycle and Overheating

Volt-Amperes Curves

Electrical Diagram

Spare Parts List

Warranty Policy

Air Liquide M 172 Specifications

Related product manuals