ESAB Origo Mig L305 User manual

Origo™
Service manual
0349 300 067 GB 20200225
Valid for:
MigL305:serialno.628-,647-,211-,331-,746-xxx-xxxx
MigL405:serialno.628-,647-,211-,331-,730-xxx-xxxx
MigL305, MigL405

TABLE OF CONTENTS
0349 300 067 © ESAB AB 2020
READ THIS FIRST.................................................................................... 3
INTRODUCTION....................................................................................... 4
TECHNICAL DATA ................................................................................... 5
WIRING DIAGRAM................................................................................... 8
Component description ......................................................................... 8
Origo™ Mig L305 .................................................................................... 8
Origo™ Mig L405 .................................................................................... 10
DESCRIPTION OF OPERATION.............................................................. 13
P1 Digital instrument.............................................................................. 13
P1:1 Calibration and voltage correction ............................................... 13
P1:2 Connections to the digital instrument........................................... 14
SERVICE INSTRUCTIONS....................................................................... 15
What is ESD? .......................................................................................... 15
Thermal switch (thermostat) replacement procedure ........................ 15
Rights reserved to alter specifications without notice.

READ THIS FIRST
0349 300 067 -3- © ESAB AB 2020
READ THIS FIRST
The maintenance and repair work should be performed by an experienced person, and
electrical work only by a trained electrician. Use only recommended replacement parts.
This service manual is intended for use by technicians with electrical/electronic training for
help in connection with fault-tracing and repair.
Use the wiring diagram as a form of index for the description of operation. The circuit board
is divided into numbered blocks, which are described individually in more detail in the
description of operation. All component names in the wiring diagram are listed in the
component description.
This manual contains details of all design changes that have been made up to and including
November 2017.
The Origo™ Mig L305, Mig L405 are designed and tested in accordance with
international and European standard IEC/EN 60974-1 and EN 60974-10.
On completion of service or repair work, it is the responsibility of the person(s) etc.
performing the work to ensure that the product does not depart from the
requirements of the above standard.

INTRODUCTION
0349 300 067 -4- © ESAB AB 2020
INTRODUCTION
The Origo™ Mig L305, Mig L405 are step switched power sources designed for
MIG/MAG-welding together with wire feed units OrigoFeed.
The power units are fan-cooled and equipped with thermal overload protection.
The equipments can be fitted with an instrument that displays current and voltage.
It incorporates a hold function and can be calibrated.

TECHNICAL DATA
0349 300 067 -5- © ESAB AB 2020
TECHNICAL DATA
Valid for serial no. 628-,647-,211- and 331-xxx-xxxx
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 l×w×h 782 × 425 × 830 812 × 552 × 925 812 × 552 × 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 23S IP 23S
Application class
Cooling unit (100% duty cycle) for Mig L405
25°C 40°C
P1L/min for 400–415 V 970 W 440 W
P1L/min for 230 V 940 W 430 W
Pmax 3.5 bar
Coolant ESAB ready mixed coolant (see the "ACCESSORIES" chapter in
the instruction manual)
Coolant quantity 5.5 l

TECHNICAL DATA
0349 300 067 -6- © ESAB AB 2020
Valid for serialno.730-xxx-xxxx and 746-xxx-xxxx
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 20% 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 l×w×h 782 × 425 × 830 812 × 552 × 925 812 × 552 × 925
Weight 79.5 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 23S IP 23S IP 23S
Application class
Cooling unit (100% duty cycle) for Mig L405
25°C 40°C
P1L/min for 400–415 V 970 W 440 W
P1L/min for 230 V 940 W 430 W
Pmax 3.5 bar
Coolant ESAB ready mixed coolant (see the "ACCESSORIES" chapter in
the instruction manual)
Coolant quantity 5.5 l
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.

TECHNICAL DATA
0349 300 067 -7- © ESAB AB 2020
Equipment marked IP23 is intended for indoor and outdoor use.
Equipment marked IP 23S is intended for indoor and outdoor use; however, should not be
operated in precipitation.
Application class
The symbol indicates that the power source is designed for use in areas with increased
electrical hazard.

WIRING DIAGRAM
0349 300 067 -8- © ESAB AB 2020
WIRING DIAGRAM
Component description
CAUTION!
STATIC ELECTRICITY can damage circuit boards and
electronic components.
• Observe precautions for handling electrostatic
sensitive devices.
• Use proper static-proof bags and boxes.
Origo™ Mig L305
Component Description
C1, C2, CES Capacitor, 0.1 μF 250 V
EV1 Fan
HL1 Lamp, green, On/Off
HL2 Lamp, yellow. Thermal overload cutout
KM1 Main contactor 42 V, 50-60 Hz
L1 Inductor
AP2 Digital instrument, accessory
QF1 Switch, ON/OFF
R1 Resistor
R2 Varistor
RS1 Shunt, accessory
SA1 10-step switch, selection of welding voltage
ST1 Thermal overload cutout, opens at 120 °C. Mounted at the cooling fins of
the diode bridge.
ST2 Thermal overload cutout, opens at 160 °C. Mounted in the winding of
transformer TM1.
TC1 Control transformer.
TC2 Transformer for CO2heater, accessory.
TC3 Transformer for digital instrument, accessory.
TM1 Main transformer.
V1-V6 Diode bridge.
XS1 Connector, 15-pole. For connection to/from the wire feed unit.
XT1 3-pole terminal block.
XT2, XT3 Connector, flat pin.

WIRING DIAGRAM
0349 300 067 -9- © ESAB AB 2020
Origo™ Mig L305, 400-415 V

WIRING DIAGRAM
0349 300 067 - 10 - © ESAB AB 2020
Origo™ Mig L405
Component Description
C1-C3 Suppression capacitors 2 μF 450 V
C4 Capacitor, 3 μF 400V. Start and run capacitor for fan motor EV1.
C6, C7 Suppression capacitors, 0.1 μF 250V
EV1 Fan
HL1 Indicating lamp 42 V, white. Lights when switch QF1 is in the ON position.
HL2 Indicating lamp 42 V, yellow. Lights to indicate operation of the thermal
cutouts.
KM1 Contactor 42 V 50 Hz. Main contactor.
L1 Inductor.
M1 Pump, 230 V 50 Hz 0.2 kW. Only power sources with water cooling.
P1 Digital instrument.
QF1 Main ON/OFF switch.
QF2 Switch, for selecting welding voltage, 4-step.
QF3 Switch, for selecting welding voltage, 10-step.
R1 Resistor
RS1 Shunt 60 mV / 400 A, accessory.
SA1 Cooling water pump switch. Only on power sources with water cooling.
ST1 Thermal switch. 150 °C Protects the equipment against excessive
temperature. Mounted on inductor.
TC1 Control transformer.
TC2 Transformer for CO2heater, accessory.
TM1 Main transformer.
V1-V6 Diode bridge.
XS1 Connector, 15-pole. For connection to/from the wire feed unit.
XS2-XS5 Main welding current contact, single-pole.
XT1 3-pole terminal block.
XT2 9-pole terminal block.