Air Liquide M 170 User manual

08/01
OWNER’S MANUAL
KEEP THIS MANUAL
The technical specifications and the wiring diagrams contained in this owner’s manual are valid only
for the model that has the part number indicated below.
M 130 - M 170
M 130:ALW-M120500381
M 170:ALW-M120500382
Air Liquide Welding is a trademark of L’Air Liquide S.A.

TABLE OF CONTENTS
1 SAFETY PRECAUTIONS - READ BEFORE USING
1.1 INSTALLATION OF EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 PERSONAL PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3 FIRE AND EXPLOSION PREVENTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.4 METAL FUME HAZARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.5 TRANSPORTING THE POWER SOURCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.6 MAGNETIC FIELDS CAN AFFECT PACEMAKERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.7 H.F. RADIATION CAN CAUSE INJURY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.8 ARC WELDING CAN CAUSE INTERFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.9 WELDING AND THE EFFECTS OF LOW FREQUENCY AND MAGNETIC FIELDS . . . . . . .5
1.10 PRINCIPAL SAFETY STANDARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 SPECIFICATIONS AND DESCRIPTION
2.1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.2 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.3 COMES COMPLETE WITH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.4 DUTY CYCLE AND OVERHEATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.5 VOLT-AMPERE CURVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3 INSTALLATION
3.1 CONNECTING THE EQUIPMENT TO THE MAIN SUPPLY . . . . . . . . . . . . . . . . . . . . . . . .10
3.2 SELECTING A LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.3 CHANGING POLARITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.4 INSTALLING WELDING GUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.5 INSTALLING WIRE SPOOL AND ADJUSTING HUB TENSION . . . . . . . . . . . . . . . . . . . . .12
3.6 INSTALLING THE WIRE INTO THE WELDING GUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.7 INSTALLING SG 185 SPOOL GUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4 OPERATION
4.1 FRONT PANEL CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.2 BACK PANEL CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5 MAINTENANCE AND TROUBLESHOOTING
5.1 TORCH MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5.2 REPLACING GUN LINER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5.3 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6 M 130 ELECTRICAL DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
7 M 170 ELECTRICAL DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
8 M 130 SPARE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
9 M 170 SPARE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
10 M 130 – M 170 COMMON SPARE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
11 MG 140 SPARE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

The use of welding equipment can cause
injury to the operator. The reading and understand-
ing of the safety standards mentioned below is com-
pulsory prior to connecting, preparing, using or
transporting welding equipment.
1.1 INSTALLATION OF EQUIPMENT
1. Installation and maintenance of equipment
must be performed in compliance with local
safety standards.
2. Frequently inspect the welder plug,
receptacle and wiring. If damaged, replace
immediately with approved electrical connec-
tions and adequately sized wiring.
3. Connect the welding ground as near as possi-
ble to the operating area.
4. Do not pass welding equipment cables through
or near lifting chains, crane cables or any elec-
trical lines.
5. If earth grounding of the workpiece is required,
ground it directly with a separate cable.
6. Do not touch the electrode if you are in contact
with the work, ground or another electrode from
a different welding machine.
7. Use only well-maintained equipment. Repair or
replace damaged parts immediately. Maintain
welding equipment according to owner’s manu-
al.
8. Never use welding equipment near water. Do not
spraywaterorotherliquids ontheweldingequipment.
9. Avoid direct contact between wet garments and
metal parts that are electrically charged.
10.Always wear gloves and rubber-soled shoes
when working in wet areas or standing on metal
surfaces.
11.Always turn off welding equipment that is not
being used. Do not leave welding equipment
unattended.
Significant DC voltage exists after removal of
input power or inverters.
• Always discharge input capacitors before touch-
ing any parts. Service work should be complet-
ed by qualified personnel only.
1.2 PERSONAL PROTECTION
1. Welding operations produce radiation, noise,
heat and noxious fumes. Suitable safety pre-
cautions must be taken to minimize the risk.
2. Wear fire resistant work gloves, long
sleeve shirts, pants, safety shoes, cap and
welding helmet to protect the skin from radia-
tion and metal sparks.
3. Always wear ear protection.
4. Always wear eye protection with side shields.
5. Position a fire resistant screen around the weld-
ing area to protect bystanders from radiation,
sparks and slag.
3
1. SAFETY PRECAUTIONS - READ BEFORE USING
WARNING
Read and understand this entire Owner’s Manual before installing,operating or servicing this equipment. While
the information contained in this Owner’s manual represents our best judgment, Air Liquide assumes no lia-
bility for its use.
Reproduction of this work, in whole or part, without written permission of the publisher is prohibited.
All rights reserved.
The publisher does not assume and hereby disclaims any liability to any party for any loss or damage caused
by any error or omission in the Air Liquide M 130 – M 170 Owner’s Manual, whether such error results from neg-
ligence, accident or any other causes.

6. Compressed gas cylinders
are potentially dangerous. Consult the supplier
for correct handling procedures. Always protect
compressed gas cylinders from the sun’s rays,
flames and sudden temperature changes.
1.3 FIRE AND EXPLOSION PREVENTION
Hot slag and sparks can
cause fire. The risk of fire and explosion can
be minimized by removing all flammable mate-
rial from the welding area.
1. Always perform welding operation with caution.
Containers and tubes that have been emptied
and thoroughly cleaned still represent a poten-
tial hazard.
2. Never perform welding operations or cut a
closed container or pipe.
3. Never perform welding operations on open con-
tainers or pipes that may have been contami-
nated with substances that could explode or
react when exposed to heat or humidity.
4. As a preventative measure, keep fire extin-
guishers near the welding operation.
1.4 METAL FUME HAZARDS
Welding fumes and gases may be
hazardous if inhaled.
1. Install a ventilation system in the welding area.
2. Use a forced air system when welding lead,
beryllium, cadmium, zinc, zinc-coated or paint-
ed material. Always wear a protective mask.
3. If the ventilation system is inadequate, use an
air respirator.
4. Beware of gas leaks. Shielding gases such as
argon are heavier than air and when used in
small spaces, will replace the air.
5. In the event that a welding operation occurs in
a confined place, the operator should be
accompanied by another person.
6. Always keep gas cylinders in a well-ventilated
area. Close the main gas valve when cylinder
is not in use.
7. Do not perform welding operations near chlori-
nated hydrocarbon vapors produced by
degreasing or painting. The heat generated by
arc rays can react to form phosgene, a highly
toxic gas.
8. Irritation of the eyes, nose and throat are symp-
toms of inadequate ventilation. Take immediate
steps to improve ventilation. Do not continue
welding if symptoms persist.
1.5 TRANSPORTING THE POWER
SOURCE
The welding machine may be carried by the
handle.
1. Always disconnect the power source and
accessories from the main supply before lifting
or handling the welding equipment.
2. Do not drag, pull or lift welding equipment by
the weld cables.
1.6 MAGNETIC FIELDS CAN AFFECT
PACEMAKERS
1. Keep pacemaker wearers away from
welding operations.
2. Pacemaker wearers should consult with a
physician prior to being exposed to any welding
or cutting operation.
4

5
1.7 H.F. RADIATION CAN CAUSE INJURY
1. High frequency (HF) emissions can
interfere with radio navigation, safety devices,
computers and communication equipment.
2. Installation of welding equipment should be
performed by a qualified electrician.
3. The operator is responsible for having a quali-
fied electrician correct any interference problem
resulting from the welding equipment installa-
tion.
4. If notified by the FCC about interference, stop
using the welding equipment immediately.
5. Have the welding equipment installation
checked and maintained on a regular basis.
6. Keep high-frequency source doors and panels
tightly shut. Keep spark gaps at the correct set-
ting and use grounding to minimize the possi-
bility of interference.
1.8 ARC WELDING CAN CAUSE INTER-
FERENCE
1. Electromagnetic energy can interfere
with sensitive electronic equipment such as
computers and computer-driven equipment like
robots.
2. Be sure that all equipment in the welding area
is electro-magnetically compatible.
3. To reduce possible interference, keep weld
cables as short as possible, close together and
down low.
4. Locate welding operations at least 100 meters
(350 feet) away from any sensitive electronic
equipment.
5. Be sure welding equipment is installed and
grounded according to this manual.
6. If interference still occurs, the operator must
take extra measures such as moving the weld-
ing machine, using shielded cables, using line
filters or shielding the work area.
1.9 WELDING ANDTHE EFFECTS OF LOW
FREQUENCY AND MAGNETIC FIELDS
As welding current flows through welding cables, it
can cause electromagnetic fields.To reduce mag-
netic fields, use the following procedures:
1Keep cables close together by twisting or taping
them.
2. Arrange cables to one side and away from the
operator.
3. Do not coil or drape coils around operators
body.
4. Keep welding power source and cables as far
away from the operator as practically possible.
5. Connect work clamp to workpiece as close to
the weld as possible.
1.10 PRINCIPAL SAFETY STANDARDS
Safety in Welding and Cutting, ANSI Standard
Z49.1 from the American Welding Society, 550
N.W. Lejeune Rd., Miami, FL 33126.
Safety and Health Standards, OSHA 29 CFR
1910, from the Superintendent of Documents,
U.S. Government Printing Office, Washington,
D.C. 20402.
Recommended Safe Practices for the Preparation
for Welding and Cutting of Containers That Have
Held Hazardous Substances, American Welding
Society Standard AWS F4.1, from the American
Welding Society, 550 N.W.Lejeune Rd., Miami, FL
33126.
National Electrical Code, NFPA Standard 70, from
the National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders,
CGA Pamphlet P-1, from the Compressed Gas
Association, 1235 Jefferson Davis Highway, Suite
501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, CSA
Standard W117.2, from the Canadian Standards
Association, Standard Sales, 178 Rexdale
Boulevard, Rexdale, Ontario M9W 1R3.
Safe Practices For Occupation And Educational
Eye And Face Protection, ANSI Standards Z87.1
from the American National Standards Institute,
1430 Broadway, NewYork, NY 10018.
Cutting And Welding Processes, NFPA Standards
51B, from the National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269.

6
EQUIPMENT INSTALLATION AND MAINTENANCE MUST BE PERFORMED IN
COMPLIANCE WITH LOCAL SAFETY STANDARDS.
• INSTALLATION AND MAINTENANCE OPERATIONS MUST BE PERFORMED BY QUALIFIED PERSONS
ONLY.
• BEFORE INSTALLING the power source, check that the power socket satisfies ampere and voltage
requirements (see data table plate). ENSURE that the socket is protected by appropriate fuses and auto-
matic switches.
• CONNECT an approved standard plug corresponding to the system socket to the power supply cable.
Electric shock could be fatal
1. Never touch exposed electrical
parts.
2. Switch off and disconnect the
power source before installing
or opening.
3. Installation may be performed
by qualified persons only.
4. Installation procedure must
comply with national electricity
standards and all other relevant
regulations.
Fumes and gases may repre-
sent a safety hazard.
Fumes and gases generated
during welding may be danger-
ous if inhaled over a long period
of time.
1. Keep clear of fumes.
2. Ventilate welding area or wear
a breathing mask.
3. Install a natural or forced air
ventilation system in the work
area.
Use a protective mask with suit-
able glass filter (at least NR10)
to safeguard eyes.
1. Wear appropriate eye, ear and
body protection equipment.
2. Protect face, ears and neck
during welding operations.
Advise other persons in the
vicinity to look away and stand
clear of arc rays and hot metal.
The positioning of welding
equipment on inflammable sur-
faces could lead to fire outbreak
or explosion.
1. Never position equipment on
combustible or inflammable
surfaces.
2. Do not install equipment in the
vicinity of inflammable liquids.
A falling power source or other
equipment may cause serious
injury to persons or damage to
objects.
1. Always make use of the handle
to lift power source (applies to
portable models).
2. Use eye bolts and adequate lift-
ing equipment to raise the
power source.
WELDING MAY CAUSE FIRES OR
EXPLOSIONS. Never weld near
inflammable materials.
1. Beware of weld flame. Always
keep a fire extinguisher close at
hand.
2. Never place welding equipment
on inflammable surfaces.
3. Do not weld in closed containers.
4. Let welding equipment and
material cool before handling
them.
Moving parts may cause injury.
1. Keep clear of hazardous areas,
such as moving rollers.
2. Keep all doors, panels and
covers closed and in place.
Hot areas may cause injury.
Let the power source or other
parts cool before performing
any maintenance or servicing.
Welding wire may cause injury.
Do not point the torch toward
any part of the body, other per-
sons or any type of metal when
unwinding welding wire.

7
2. SPECIFICATIONS AND DESCRIPTION
2.1 SPECIFICATIONS
2.2 DESCRIPTION
M 130 is a complete semi-automatic, constant
voltage, DC arc welding machine. This compact,
reliable unit, capable of welding material thick-
nesses from 0.5 mm (24 gauge) to 4.8 mm (3/16
in), is ideal for the home hobbyist, the workshop
or auto body repairs. The easy-to-use M 130
plugs into any 110-volt receptacle and delivers a
superior, consistent arc. The portable M 130
weighs 23 kg (50 lb) and offers excellent perform-
ance throughout the entire welding range. Throw
on an optional spool gun and you have a conven-
ient, immediate solution for all your
aluminum welding needs.
M 170 is a complete semi-automatic, constant voltage,
DC arc welding machine. This compact, reliable unit,
capable of welding material thicknesses from 0.5 mm
(24 gauge) to 6.35 mm (1⁄4in) is ideal for light fabrica-
tion, the garage or auto body repairs.The easy-to-use
M 170 offers versatility and delivers a superior, consis-
tent arc. The portable M 170 weighs 28 kg (62 lb) and
offers excellent performance throughout the entire
welding range.Throw on an optional spool gun and you
have a convenient, immediate solution for all your alu-
minum welding needs.
2.3 COMES COMPLETE WITH:
1. 2.4 m (8 ft) input power cord with
5p-15 plug (M 130) or 6p-50 plug (M 170)
2. 3 m (10 ft) MIG gun
3. Extra contact tips
4. 3 m (10 ft) ground cable with clamp
5. 1 lb spool adaptor
1
2
43
5
M 130 M 170
M 170
1

8
2.4 DUTY CYCLE AND OVERHEATING:
Duty cycle is the percentage of 10 minutes that the unit can weld at its rated output without overheating. If the
unit overheats, the weld output will stop.To correct this situation, wait fifteen minutes for the unit to cool. Reduce
amperage or duty cycle before starting to weld again.
• Exceeding duty cycle can damage unit and void warranty.
DUTY CHART M 130
0
20
40
60
80
100
120
10 20 30 40 50 60 70 80 90 100
% DUTY CYCLE
DUTY CHART M 170
0
20
40
60
80
100
120
140
10 20 25 30 40 50 60 70 80 90 100
% DUTY CYCLE
OUTPUT, AMPERESOUTPUT, AMPERES
M 130 Duty Cycle
M 170 Duty Cycle

9
0
5
10
15
20
25
30
35
40
0 20 40 60 80 100 120 140 160 180 200 220 240
2.5 VOLT-AMPERE CURVES
Volt-ampere curves show the maximum voltage and amperage output capabilities of the welding power source.
Curves of other settings fall under curves shown.
Volts Volts
Amps
Amps
M 130 Volt-Ampere Curve
M 170 Volt-Ampere Curve

10
3. INSTALLATION
3.1 CONNECTING THE EQUIPMENT TO
THE MAIN SUPPLY
The equipment works within an input range of
±10%.
Check to ensure that the power outlet is equipped
with a fuse that is capable of carrying the amps
indicated on the data plate of this unit.
3.2 SELECTING A LOCATION
Special installation may be required
where gasoline or volatile liquids are present
(See NEC Article 511 or CEC Section 20). Do
not move or operate this equipment where it
could tip over. When selecting a location for
this equipment, ensure that the following
guidelines are followed:
1. Use data plate to determine input power
requirements.
2. The operator must have unobstructed access to
all controls and equipment connections.
3. Do not position equipment in small, closed
places. Ventilation of the power source is
extremely important. Make sure that the louvers
on the side panels are not obstructed and that
there is no risk of obstruction during operation.
4. Avoid areas where dust or other objects could
be sucked into the system.
5. Equipment must not obstruct corridors or work
activities of other personnel.
6. Position the power source securely to avoid
falling or overturning.
7. Understand the risk of falling equipment situat-
ed in overhead positions.
3.3 CHANGING POLARITY
TURN OFF WELDER BEFORE MAKING
CONNECTIONS.
(Consult wire data to verify polarity require-
ments.)
DCEN (Straight Polarity)
1. Connect the ground cable to the positive recep-
tacle inside the unit.
2. Connect the power cable to the negative recep-
tacle inside the unit.
DCEP (Reverse Polarity)
1.Connect the ground cable to the negative recep-
tacle inside the unit.
2. Connect the power cable to the positive recep-
tacle inside the unit.
INSTALLING GAS HOSE AND REGULATOR
1. Install the gas hose on the inlet connection
located on the rear of the machine.
2. Install the regulator on the cylinder outlet con-
nection located on the top of the compressed
gas cylinder.
3. Connect the male gas hose connection to the
female regulator connection.
3.4 INSTALLING WELDING GUN
TURN OFF WELDER BEFORE MAKING
CONNECTIONS.
Before connecting the torch, ensure that the drive
rolls, gun liner and contact tip match the diameter
of the wire being used.
When installing the welding gun, follow the
sequence described below.

11
1
2
3
4
INSTALLING WELDING GUN
TURN OFF WELDER BEFORE MAKING CONNECTIONS.
Supplied with
machine

12
3.5 INSTALLING WIRE SPOOL AND
ADJUSTING HUB TENSION
1. Install the wire spool (See figure 2)
2. To increase tension, adjust the 11/16” nut in a
clockwise direction.
3. To decrease tension, adjust the 11/16” nut in a
counter clockwise direction.
3.6 INSTALLING THE WIRE INTO THE
WELDING GUN
1. Open the pressure assembly on the wire feed-
er.
2. Push wire through guide into gun.
3. Close and tighten pressure assembly.
4. Remove gun nozzle and contact tip.
5. Press the gun trigger until wire comes out of
the welding gun.
Typical Weld Parameter Settings : M 130
Fig. 2
Typical Weld Parameter Settings : M 170
6. Reinstall contact tip and nozzle.
7. Feed wire by pressing the gun trigger to check
drive roll pressure.
8. Tighten pressure assembly knob enough to pre-
vent slippage.
9. Cut off wire and begin welding.

13
3.7 INSTALLING SG 185 SPOOL GUN
1. Lift and position the side panel into an upright position.
2. Remove gun inlet cover located on the front panel of the welding machine.
3. Insert the SG 185 Spool Gun through the gun inlet.
4. Remove the gas hose from the gas inlet on the wire feeder unit (See reference 1 in figure 1).
5. Connect the male gas connection (See reference 2 in figure 2) of the spool gun to the gas hose.
6. Remove the male trigger connector (See reference 2 in figure 1).
7. Connect the male spool gun trigger connector (See reference 1 in figure 2) to the female trigger receptacle.
8. Connect the power cable lug (See reference 3 in figure 2) to the positive receptacle inside the unit
(See reference 3 in figure 1).
Fig. 1
Fig. 2
1
3
2
1
3
2

14
4 OPERATION
4.1 FRONT PANEL CONTROLS
1. WIRE SPEED CONTROL
Use this control to adjust wire feed speed. When
wire speed is increased, welding amperage
increases. When wire feed speed decreases,
welding amperage decreases.
2. VOLTAGE SWITCH
Use this control to turn the wire feed unit on and to
adjust welding voltage.Thicker material will require
higher voltage settings.
Do not switch under load.
3. DATA PLATE
M 130
M 170
4.2 BACK PANEL CONTROLS
1. GAS CONNECTIONS
2. INPUT POWER CORD
.
5 MAINTENANCE AND TROUBLESHOOTING
DISCONNECTTHE POWER SOURCE
FROM POWER SUPPLY BEFORE PERFORM-
ING ANY MAINTENANCE WORK.
Periodically, remove the side panels and blow out
the machine with dry compressed air to remove
dirt and dust.
Increase the frequency of cleaning when operating
in dirty or dusty conditions.
5.1 TORCH MAINTENANCE
As required, clean the interior of the gas nozzle to
prevent buildup of spatter.
To change the contact tip:
1. Slide off the gas nozzle.
2. Unscrew the contact tip.
3. Fit the new contact tip.
4. Replace the gas nozzle.
To change the gas diffuser:
1. Slide off the gas nozzle.
2. Unscrew the contact tip.
3. Unscrew the gas diffuser and replace.
4. Fit the contact tip.
5. Fit the gas nozzle.
The same switch is to be used to turn the power ON and OFF.

5.2 REPLACINGTHE GUN LINER
1.Turn OFF welder.
2. Follow the instructions in the figure below:
No functions operate Faulty power cord (one or more Check and remedy
phases disconnected)
Blown fuse Replace
Irregular wire feed Insufficient spring pressure Tighten pressure assembly knob
Wire-guide blocked Replace
Wire groove - unsuitable for wire, Turn roller over or change it
or excessively worn
Excessive braking on coil Loosen brake using adjusting screw
Oxidized, poorly wound, poor quality wire, Remedy by removing defective coils. If problem persists,
with tangled or overlapping coils, etc. change the wire reel
Reduced welding power Ground cable not connected Check that the power cord is in good condition and make
sure that the ground clamps are flrmly fixed to the workpiece
Detached or loose connection Check, tighten or replace, as necessary
on switches
Faulty contactor Check the state of the contacts and the
mechanical efficiency of the contactor
Faulty rectifier Visually check for signs of burn-out; if present, replace rectifler
Porous or spongy welds No gas Check presence of gas and gas supply pressure
Drafts in the welding area Use a suitable screen. Increase gas delivery
pressure if necessary
Clogged holes in gas diffuser Clear clogged holes using compressed air
Gas leakage in supply hoses Check and replace faulty component
Solenoid valve blocked Check solenoid operation and electrical connection
Faulty regulator Check operation by removing the hose connecting
the pressure regulator to the power source
Poor quality gas or wire Gas must be extra-dry; change the cylinder or use
a different type wire
Gas supply does Worn or dirty solenoid valve Replace solenoid
not switch off
Presslng torch trigger Faulty torch trigger, disconnected Remove the torch connection plug and short circuit the poles;
produces no result or broken control cables if the machine operates properly, check the cables and
the torch trigger
Fuse blown Replace, using a fuse of the same rating
Faulty power switch Clean with compressed air. Ensure that wires are
tightly secured; replace switch if necessary
Faulty electronic circuit Replace circuit
TYPE OF BREAKDOWN POSSIBLE CAUSES CHECKS AND SOLUTIONS
5.3 TROUBLESHOOTING
15

16
6. M 130 ELECTRICAL DIAGRAM

17
7. M 170 ELECTRICAL DIAGRAM

18
8. M 130 SPARE PARTS LIST

19
CODE

20
9. M 170 SPARE PARTS LIST