ESAB Origo Mig L305 User manual

Origo™
Instruction manual
0349 301 124 GB 20170310 Valid for: serial no. 628-, 647-, 211-xxx-xxxx
Mig L305    
Mig L405

TABLE OF CONTENTS
0349 301 124 © ESAB AB 2017
1SAFETY ........................................................................................................ 4
1.1 Meaning of symbols ................................................................................. 4
1.2 Safety precautions ................................................................................... 4
2INTRODUCTION............................................................................................ 7
2.1 Equipment ................................................................................................. 7
3TECHNICAL DATA ........................................................................................ 8
4INSTALLATION.............................................................................................. 9
4.1 Positioning of welding power source..................................................... 9
4.2 Assembly of counter balance ................................................................. 9
4.3 Assembly of components........................................................................ 10
4.4 Electrical installation ............................................................................... 11
4.5 Mains power supply ................................................................................. 12
5OPERATION .................................................................................................. 14
5.1 Connection and control devices ............................................................. 14
5.2 Overheating protection ............................................................................ 15
5.3 Inductance connection ............................................................................ 15
6MAINTENANCE............................................................................................. 16
6.1 Inspection and cleaning........................................................................... 16
6.2 Topping up the coolant ............................................................................ 16
7TROUBLESHOOTING ................................................................................... 18
8ORDERING SPARE PARTS .......................................................................... 19
CLEANING............................................................................................................ 20
DIAGRAM ............................................................................................................. 21
ORDERING NUMBERS........................................................................................ 24
ACCESSORIES .................................................................................................... 25
Rights reserved to alter specifications without notice.

1 SAFETY
0349 301 124 -4- © ESAB AB 2017
1 SAFETY
1.1 Meaning of symbols
As used throughout this manual: Means Attention! Be Alert!
DANGER!
Means immediate hazards which, if not avoided, will result in immediate,
serious personal injury or loss of life.
WARNING!
Means potential hazards which could result in personal injury or loss of
life.
CAUTION!
Means hazards which could result in minor personal injury.
WARNING!
Before use, read and understand the instruction manual
and follow all labels, employer´s safety practices and Safety
Data Sheets (SDSs).
1.2 Safety precautions
Users of ESAB equipment have the ultimate responsibility for ensuring that anyone who
works on or near the equipment observes all the relevant safety precautions. Safety
precautions must meet the requirements that apply to this type of equipment. The following
recommendations should be observed in addition to the standard regulations that apply to
the workplace.
All work must be carried out by trained personnel well-acquainted with the operation of the
equipment. Incorrect operation of the equipment may lead to hazardous situations which can
result in injury to the operator and damage to the equipment.
1. Anyone who uses the equipment must be familiar with:
○ its operation
○ location of emergency stops
○ its function
○ relevant safety precautions
○ welding and cutting or other applicable operation of the equipment
2. The operator must ensure that:
○ no unauthorised person is stationed within the working area of the equipment
when it is started up
○ no-one is unprotected when the arc is struck or work is started with the
equipment
3. The workplace must:
○ be suitable for the purpose
○ be free from drafts

1 SAFETY
0349 301 124 -5- © ESAB AB 2017
4. Personal safety equipment:
○ Always wear recommended personal safety equipment, such as safety glasses,
flame-proof clothing, safety gloves
○ Do not wear loose-fitting items, such as scarves, bracelets, rings, etc., which
could become trapped or cause burns
5. General precautions:
○ Make sure the return cable is connected securely
○ Work on high voltage equipment may only be carried out by a qualified
electrician
○ Appropriate fire extinguishing equipment must be clearly marked and close at
hand
○ Lubrication and maintenance must not be carried out on the equipment during
operation
WARNING!
Arc welding and cutting can be injurious to yourself and others. Take precautions
when welding and cutting.
ELECTRIC SHOCK - Can kill
• Install and ground the unit in accordance with instruction manual.
• Do not touch live electrical parts or electrodes with bare skin, wet gloves or
wet clothing.
• Insulate yourself from work and ground.
• Ensure your working position is safe
ELECTRIC AND MAGNETIC FIELDS - Can be dangerous to health
• Welders having pacemakers should consult their physician before welding.
EMF may interfere with some pacemakers.
• Exposure to EMF may have other health effects which are unknown.
• Welders should use the following procedures to minimize exposure to
EMF:
○ Route the electrode and work cables together on the same side of
your body. Secure them with tape when possible. Do not place your
body between the torch and work cables. Never coil the torch or
work cable around your body. Keep welding power source and
cables as far away from your body as possible.
○ Connect the work cable to the workpiece as close as possible to the
area being welded.
FUMES AND GASES - Can be dangerous to health
• Keep your head out of the fumes.
• Use ventilation, extraction at the arc, or both, to take fumes and gases
away from your breathing zone and the general area.
ARC RAYS - Can injure eyes and burn skin
• Protect your eyes and body. Use the correct welding screen and filter lens
and wear protective clothing.
• Protect bystanders with suitable screens or curtains.
NOISE - Excessive noise can damage hearing
Protect your ears. Use earmuffs or other hearing protection.

1 SAFETY
0349 301 124 -6- © ESAB AB 2017
MOVING PARTS - Can cause injuries
• Keep all doors, panels and covers closed and securely in place. Have only
qualified people remove covers for maintenance and troubleshooting as
necessary. Reinstall panels or covers and close doors when service is
finished and before starting engine.
• Stop engine before installing or connecting unit.
• Keep hands, hair, loose clothing and tools away from moving parts.
FIRE HAZARD
• Sparks (spatter) can cause fire. Make sure that there are no inflammable
materials nearby.
• Do not use on closed containers.
MALFUNCTION - Call for expert assistance in the event of malfunction.
PROTECT YOURSELF AND OTHERS!
CAUTION!
This product is solely intended for arc welding.
WARNING!
Do not use the power source for thawing frozen pipes.
CAUTION!
Class A equipment is not intended for use in residential
locations where the electrical power is provided by the
public low-voltage supply system. There may be potential
difficulties in ensuring electromagnetic compatibility of class
A equipment in those locations, due to conducted as well
as radiated disturbances.
NOTE!
Dispose of electronic equipment at the recycling
facility!
In observance of European Directive 2012/19/EC on Waste
Electrical and Electronic Equipment and its implementation
in accordance with national law, electrical and/or electronic
equipment that has reached the end of its life must be
disposed of at a recycling facility.
As the person responsible for the equipment, it is your
responsibility to obtain information on approved collection
stations.
For further information contact the nearest ESAB dealer.
ESAB has an assortment of welding accessories and personal protection equipment
for purchase. For ordering information contact your local ESAB dealer or visit us on
our website.

2 INTRODUCTION
0349 301 124 -7- © ESAB AB 2017
2 INTRODUCTION
Mig L305, Mig L405 are step switched power sources designed for MIG/MAG-welding
together with wire feed units Feed L302 and Feed L304.
The power units are fan-cooled and equipped with thermal overload protection. They can be
fitted with an instrument that displays current and voltage.
It incorporates a hold function and can be calibrated.
ESAB accessories for the product can be found in the "ACCESSORIES" chapter of
this manual.
2.1 Equipment
The power source is supplied with:
• Return cable 5 m (L305 - 3.5 m) with clamp
• Shelf for gas cylinder
• Guide pin for wire feed unit
• Instruction manual

3 TECHNICAL DATA
0349 301 124 -8- © ESAB AB 2017
3 TECHNICAL DATA
Mig L305 Mig L405 Mig L405
Voltage 400-415 V,
3~50/60Hz
400-415 V,
3~50/60Hz
230/400-415/500V
3~50Hz
230/440-460V
3~60Hz
Permissible load
at 100% duty cycle 150 A 280 A/28 V 280 A/28 V
at 60% duty cycle 190 A 365 A/32 V 365 A/32 V
at 50% duty cycle - 400 A/34 V 400 A/34 V
at 25% duty cycle 300 A - -
Setting range (DC) 30 A/15 V -
300A/29V
50 A/16,5 V -
400A/34V
50 A/16,5 V -
400A/34V
Open circuit voltage 17-40 V 17-45 V 17-45 V
Open circuit power 190 W 360 W 360 W
with cooling unit - 600 W 600 W
Efficiency at max
current
69% 71% 71%
Power factor at max
current
0,97 0,98 0,98
Control voltage 42 V, 50/60 Hz 42 V, 50/60 Hz 42 V, 50/60 Hz
Dimensions lxwxh 782 x 425 x 830 812 x 552 x 925 812 x 552 x 925
Weight 89 kg 142 kg 143 kg
with cooling unit - 156 kg 156 kg
Operating
temperature
-10 to +40 °C -10 to +40 °C -10 to +40 °C
Transportation
temperature
-20 to +55 °C -20 to +55 °C -20 to +55 °C
Enclosure class IP 23 IP 23 IP 23
Application class
Coolant ESAB ready mixed coolant
Duty cycle
The duty cycle refers to the time as a percentage of a ten-minute period that you can weld or
cut at a certain load without overloading. The duty cycle is valid for 40°C/104°F, or below.
Enclosure class
The IP code indicates the enclosure class, i.e. the degree of protection against penetration
by solid objects or water.
Equipment marked IP23 is intended for indoor and outdoor use.
Application class
The symbol indicates that the power source is designed for use in areas with increased
electrical hazard.

4 INSTALLATION
0349 301 124 -9- © ESAB AB 2017
4 INSTALLATION
The installation must be carried out by a professional.
CAUTION!
This product is intended for industrial use. In a domestic environment this product
may cause radio interference. It is the user's responsibility to take adequate
precautions.
WARNING!
Straps must be used when lifting the
power source. The handle is only
intended for pulling it.
4.1 Positioning of welding power source
Position the welding power source in such a way that its cooling air inlets and outlets are not
obstructed.
4.2 Assembly of counter balance
Assemble the stabilizer + CB KIT if the counter balance is to be installed on the power
source. The stabilizer + CB KIT is an accessory. See "ACCESORIES" chapter for order
number.
NOTE!
Use of a counter balance without stabilizer may cause the welding equipment to
tip over.

4 INSTALLATION
0349 301 124 - 10 - © ESAB AB 2017
4.3 Assembly of components
WARNING!
During transport, the rear wheels of the power source are in their forward position
Before use, place the wheels in their rear position.

4 INSTALLATION
0349 301 124 - 11 - © ESAB AB 2017
4.4 Electrical installation

4 INSTALLATION
0349 301 124 - 12 - © ESAB AB 2017
L405
4.5 Mains power supply
Check that the unit is connected to the correct mains power supply voltage, and that it is
protected by the correct fuse size. A protective earth connection must be made, in
accordance with regulations.
Rating plate with supply connection data
Recommended fuse sizes and minimum cable areas
L305 3~ 50/60 Hz
Voltage V 400/415
Current A
at 100% duty cycle 7
at 60% duty cycle 10
at 25% duty cycle 18
Cable area mm24 x 2.5
Fuse, slow A 16
L405 3~ 50 Hz 3~ 50/60 Hz 3~ 50 Hz 3~ 60 Hz 3~ 60 Hz
Voltage V 203 400/415 500 230 440/460
Current A

4 INSTALLATION
0349 301 124 - 13 - © ESAB AB 2017
L405 3~ 50 Hz 3~ 50/60 Hz 3~ 50 Hz 3~ 60 Hz 3~ 60 Hz
at 100% duty cycle 28 16 13 28 14
at 60% duty cycle 42 24 19 41 21
at 50% duty cycle 45 28 20 45 22
Cable area mm24 x 6 4 x 2.5 4 x 2.5 4 x 6 4 x 2.5
Fuse, slow A 25 20 20 25 20
NOTE!
The mains cable areas and fuse sizes as shown above are in accordance with
Swedish regulations. For other regions, supply cables must be suitable for the
application and meet local and national regulations.

5 OPERATION
0349 301 124 - 14 - © ESAB AB 2017
5 OPERATION
General safety regulations for handling the equipment can be found in the "SAFETY"
chapter of this manual. Read it through before you start using the equipment!
WARNING!
Secure the equipment - particularly if
the ground is uneven or sloping.
5.1 Connection and control devices
1 Mains supply switch 8 Connection for return cable (-), high
inductance
2 Main supply switch for cooling unit 9 Connection for return cable (-), low
inductance
3 Switch, precise control 10 Connection for welding current cable (+)
4 Switch, coarse control 11 Connection for control cable for wire
feeder
5 Indicating lamp, power supply ON 12 Connection RED for cooling water from
the wire feed unit
6 Orange indicating lamp, overheating 13 Connection BLUE for cooling water to the
wire feed unit
7 Digital instrument V/A*
NOTE!
*Digital instrument V/A only available on certain models.

5 OPERATION
0349 301 124 - 15 - © ESAB AB 2017
5.2 Overheating protection
A thermal overload cutout protects against overheating. The cutout resets automatically
when the unit has cooled.
5.3 Inductance connection
Higher inductance produces a more flowing weld and fewer spatters. Lower inductance
produces a harsher sound and a stable, concentrated arc.

6 MAINTENANCE
0349 301 124 - 16 - © ESAB AB 2017
6 MAINTENANCE
NOTE!
Regular maintenance is important for safe and reliable operation.
CAUTION!
Only those persons who have appropriate electrical knowledge (authorized
personnel) may remove the safety plates.
CAUTION!
All warranty undertakings from the supplier cease to apply if the customer
attempts any work to rectify any faults in the product during the warranty period.
6.1 Inspection and cleaning
Check regularly that the power source is free from dirt.
The power source should be regularly blown clean using dry compressed air at reduced
pressure, see "CLEANING" chapter. This should be done more frequently in dirty
environments.
Otherwise the air inlet/outlet may become blocked and cause overheating. To avoid this you
can use an air filter.
6.2 Topping up the coolant
ESAB ready mixed coolant is recommended for use. See "ACCESSORIES" chapter.
• Fill with coolant.
(The fluid level must not exceed the upper marking but neither must it be below the
lower marking).
• Disconnect the coolant hose for outgoing water (welding torch blue connection) in
order to bleed any trapped air.
• Connect the coolant hose again.
NOTE!
Coolant must be topped up if connecting a welding torch or connection cables
that are 5 meters in length or longer. When adjusting the water level by topping
up, the coolant hose does not need to be disconnected.

6 MAINTENANCE
0349 301 124 - 17 - © ESAB AB 2017
CAUTION!
The coolant must be handled as chemical waste.

7 TROUBLESHOOTING
0349 301 124 - 18 - © ESAB AB 2017
7 TROUBLESHOOTING
Try these recommended checks and inspections before sending for an authorised service
technican.
Type of fault Actions
No arc • Check that the mains power supply switch is turned on.
• Check that the welding current supply and return cables
are correctly connected.
• Check that correct current value is set.
• Check to see whether the MCB has tripped.
Welding current is
interrupted during welding
• Check whether the thermal overload trip has operated
(indicated by the orange lamp on the front).
• Check the main power supply fuses.
Thermal overload trips
operate frequently
• Check to see whether the air inlets/outlets are clogged.
• Make sure that you are not exceeding the rated data for
the power source (i.e. that the unit is not being
overloaded).
Poor welding performance • Check that the welding current supply and return cables
are correctly connected.
• Check that the correct current value is set.
• Check that the correct welding wires are being used.
• Check the main power supply fuses.

8 ORDERING SPARE PARTS
0349 301 124 - 19 - © ESAB AB 2017
8 ORDERING SPARE PARTS
CAUTION!
Repair and electrical work should be performed by an authorised ESAB service
technician. Use only ESAB original spare and wear parts.
Mig L305, Mig L405 are designed and tested in accordance with the international and
European standards 60974-1 and 60974-10. It is the obligation of the service unit
which has carried out the service or repair work to make sure that the product still
conforms to the mentioned standard.
Spare parts and wear parts can be ordered through your nearest ESAB dealer, see the back
cover of this document. When ordering, please state product type, serial number, designation
and spare part number in accordance with the spare parts list. This facilitates dispatch and
ensures correct delivery.

CLEANING
0349 301 124 - 20 - © ESAB AB 2017
CLEANING