Lincoln Electric LF 52D User manual

IM3104
05/2020
REV03
LF 52D LF 56D
OPERATOR’S MANUAL
ENGLISH
Lincoln Electric Bester Sp. z o.o.
ul. Jana III Sobieskiego 19A, 58-263 Bielawa, Poland
www.lincolnelectric.eu

English I English
12/05
THANK YOU! For choosing the QUALITY of the Lincoln Electric products.
Please check packaging and equipment for damage. Claims for material damaged in shipment must be notified
immediately to the dealer.
For ease of use, please enter your product identification data in the table below. Model Name, Code & Serial Number
can be found on the machine rating plate.
Model Name:
………………...…………………………….…………………………………………………………………………………………..
Code & Serial number:
………………….……………………………………………….. …………………………………………………….……………..
Date & Where Purchased:
…………………………………………………………………... ……………………….…………………………………………..
ENGLISH INDEX
Technical Specifications...................................................................................................................................................... 1
Electromagnetic Compatibility (EMC).................................................................................................................................. 2
Safety.................................................................................................................................................................................. 3
Introduction ......................................................................................................................................................................... 5
Installation and Operator Instructions.................................................................................................................................. 5
WEEE ............................................................................................................................................................................... 39
Spare Parts ....................................................................................................................................................................... 39
REACh .............................................................................................................................................................................. 39
Authorized Service Shops Location .................................................................................................................................. 39
Electrical Schematic.......................................................................................................................................................... 39
Accessories....................................................................................................................................................................... 40
Connection configuration................................................................................................................................................... 42

English 1 English
Technical Specifications
NAME INDEX
LF 52D K14186-1
LF 56D K14187-1
INPUT
Input Voltage U1Input Amperes I1EMC Class
LF 52D 40Vdc 4Adc A
LF 56D
RATED OUTPUT
Duty Cycle 40°C
(based on a 10 min. period) Output Current
LF 52D 100% 420A
60% 500A
LF 56D 100% 420A
60% 500A
OUTPUT RANGE
Welding Current Range Peak Open Circuit Voltage
LF 52D 5 ÷ 500A 113Vdc peak
LF 56D
DIMENSION
Weight Height Width Length
LF 52D 17 kg 516 mm 302 mm 642 mm
LF 56D 17,7 kg
WIRE FEED SPEED RANGE / WIRE DIAMETER
WFS Range Drive Rolls Drive roll diameter
LF 52D 1.5 ÷ 22 m/min 4 Ø37
LF 56D
Solid Wires Aluminum Wires Cored Wires
LF 52D 0.8 ÷ 1.6 mm 1.0 ÷ 1.6 mm 0.9 ÷ 1.6 mm
LF 56D
Protection Rating Maximum Gas Pressure
LF 52D IP23 0,5 MPa (5 bar)
LF 56D
Operating Temperature Storage Temperature
LF 52D from -10°C to +40°C from -25°C to 55°C
LF 56D

English 2 English
Electromagnetic Compatibility (EMC)
01/11
This machine has been designed in accordance with all relevant directives and standards. However, it may still generate
electromagnetic disturbances that can affect other systems like telecommunications (telephone, radio, and television) or
other safety systems. These disturbances can cause safety problems in the affected systems. Read and understand this
section to eliminate or reduce the amount of electromagnetic disturbance generated by this machine.
This machine has been designed to operate in an industrial area. To operate in a domestic area it is necessary
to observe particular precautions to eliminate possible electromagnetic disturbances. The operator must install
and operate this equipment as described in this manual. If any electromagnetic disturbances are detected the
operator must put in place corrective actions to eliminate these disturbances, if necessary with assistance from
Lincoln Electric.
Before installing the machine, the operator must check the work area for any devices that may malfunction because of
electromagnetic disturbances. Consider the following.
Input and output cables, control cables, and telephone cables that are in or adjacent to the work area and the machine.
Radio and/or television transmitters and receivers. Computers or computer controlled equipment.
Safety and control equipment for industrial processes. Equipment for calibration and measurement.
Personal medical devices like pacemakers and hearing aids.
Check the electromagnetic immunity for equipment operating in or near the work area. The operator must be sure that
all equipment in the area is compatible. This may require additional protection measures.
The dimensions of the work area to consider will depend on the construction of the area and other activities that are
taking place.
Consider the following guidelines to reduce electromagnetic emissions from the machine.
Connect the machine to the input supply according to this manual. If disturbances occur if may be necessary to take
additional precautions such as filtering the input supply.
The output cables should be as short as possible and positioned together as close as possible to each other. If possible
connect the work piece to ground in order to reduce the electromagnetic emissions. The operator must check that
connecting the work piece to ground does not cause problems or unsafe operating conditions for personnel and
equipment.
Shielding of cables in the work area can reduce electromagnetic emissions. This may be necessary for special
applications.
WARNING
EMC classification of this product is class A in accordance with electromagnetic compatibility standard EN 60974-10 which
means that the product is designed to be used in an industrial environment only.
WARNING
The 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 in those locations,
due to conducted as well as radiated disturbances.

English 3 English
Safety
01/11
WARNING
This equipment have to be used by qualified personnel. Be sure that all installation, operation, maintenance and repair
procedures are performed only by qualified person. Read and understand this manual before operating this equipment.
Failure to follow the instructions in this manual could cause serious personal injury, loss of life, or equipment damage. Read
and understand the following explanations of the warning symbols. Lincoln Electric is not responsible for damages caused
by improper installation, improper care or abnormal operation.
WARNING: This symbol indicates that instructions must be followed to avoid serious personal injury, loss
of life, or equipment damage. Protect yourself and others from possible serious injury or death.
READ AND UNDERSTAND INSTRUCTIONS: Read and understand this manual before operating this
equipment. Arc welding can be hazardous. Failure to follow the instructions in this manual could cause
serious personal injury, loss of life, or equipment damage.
ELECTRIC SHOCK CAN KILL: Welding equipment generates high voltages. Do not touch the electrode,
work clamp, or connected work pieces when this equipment is turned on. Insulate yourself from the
electrode, work clamp, and connected work pieces.
ELECTRICALLY POWERED EQUIPMENT: Turn off the input power using the disconnect switch at the
fuse box before working on this equipment. Ground this equipment in accordance with local electrical
regulations.
ELECTRICALLY POWERED EQUIPMENT: Regularly inspect the input, electrode, and work clamp
cables. If any insulation damage exists replace the cable immediately. Do not place the electrode holder
directly on the welding table or any other surface in contact with the work clamp to avoid the risk of
accidental arc ignition.
ELECTROMAGNETIC FIELD MAY BE DANGEROUS: Electric current flowing through any conductor
creates electromagnetic field (EMF). EMF fields may interfere with some pacemakers, and welders having
a pacemaker shall consult their physician before operating this equipment.
CE COMPLIANCE: This equipment complies with the European Community Directives.
ARTIFICIAL OPTICAL RADIATION: According with the requirements in 2006/25/EC Directive and
EN 12198 Standard, the equipment is a category 2. It makes mandatory the adoption of Personal
Protective Equipment (PPE) having filter with a protection degree up to a maximum of 15, as required by
EN169 Standard.
FUMES AND GASES CAN BE DANGEROUS: Welding may produce fumes and gases hazardous to
health. Avoid breathing these fumes and gases. To avoid these dangers the operator must use enough
ventilation or exhaust to keep fumes and gases away from the breathing zone.
ARC RAYS CAN BURN: Use a shield with the proper filter and cover plates to protect your eyes from
sparks and the rays of the arc when welding or observing. To protect the skin, use suitable clothing made
of durable, fireproof material. Protect other nearby personnel with suitable, non-flammable screening and
warn them not to watch the arc nor expose themselves to the arc.

English 4 English
WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION: Remove fire hazards from the welding area
and have a fire extinguisher easily accessible. Welding sparks and hot materials from the welding process
can easily go through small cracks and openings to adjacent areas. Do not weld on any tanks, drums,
containers, or material until the proper steps have been taken to insure that no flammable or toxic vapors
will be present. Never use this equipment when flammable gases, vapors or flammable liquids are
present.
WELDED MATERIALS CAN BURN: Welding generates a large amount of heat. Hot surfaces and
materials in work area can cause serious burns. Use gloves and pliers when touching or moving
materials in the work area.
CYLINDER MAY EXPLODE IF DAMAGED: Use only certificate, compressed gas cylinders containing
the correct shielding gas for the process used and properly operating regulators designed for the gas and
pressure used. Always keep cylinders in an upright position securely chained to a fixed support. Do not
move or transport gas cylinders with the protection cap removed. Do not allow the electrode, electrode
holder, work clamp or any other electrically live part to touch a gas cylinder. Gas cylinders must be
located away from areas where they may be subjected to physical damage or the welding process
including sparks and heat sources.
MOVING PARTS ARE DANGEROUS: There are moving mechanical parts in this machine, which can
cause serious injury. Keep your hands, body and clothing away from those parts during machine starting,
operating and servicing.
SAFETY MARK: This equipment is suitable for supplying power for welding operations carried out in an
environment with increased risk of electric shock.
The manufacturer reserves the right to make changes and/or improvements in design without upgrade at the same time the
operator’s manual.

English 5 English
Introduction
LF 52D and LF 56D are digital wire feeders which have
been designed to work with Lincoln Electric power
sources:
POWERTEC®i350S,
POWERTEC®i420S,
POWERTEC®i500S.
The CAN protocol is used for communication between the
power source and the wire feeder. All signals from the
power source are displayed on the User Interface located
in the wire feeder machine.
Power source – wire feeder set allow the welding:
GMAW (MIG/MAG)
FCAW
SMAW (MMA)
The complete package contains:
Wire feeder device
USB with operator’s manual
Lifting sling
Abridged manual.
Recommended equipment, which can be bought by user,
was mentioned in the chapter "Accessories".
Installation and Operator Instructions
Read this entire section before installation or operating the
machine.
Exploitation conditions
This machine can operate in harsh environments.
However, it is important to use the following simple
preventive measures that will ensure its long life and
reliable operation:
Do not place or operate this machine on a surface with
an incline higher than 15° from horizontal.
Do not use this machine for pipe thawing.
This machine must be located where there is free
circulation of clean air without restrictions for air
movement. Do not cover the machine with paper, cloth
or rags when switched on.
Dirt and dust that can be drawn into the machine
should be kept to a minimum.
This machine has a protection rating of IP23. Keep it
dry when possible and do not place it on wet ground
or in puddles.
Locate the machine away from radio controlled
machinery. Normal operation may adversely affect
the operation of nearby radio controlled machinery,
which may result in injury or equipment damage.
Read the section on electromagnetic compatibility in
this manual.
Do not operate in areas with an ambient temperature
greater than 40°C.
Duty cycle and Overheating
The duty cycle of a welding machine is the percentage of
time in a 10 minute cycle at which the welder can operate
the machine at rated welding current.
Example: 60% duty cycle:
Welding for 6 minutes. Break for 4 minutes.
Excessive extension of the duty cycle will cause the
thermal protection circuit to activate.
Minutes or decrease
Duty Cycle
Input Supply Connection
Check the input voltage, phase, and frequency of the
power source that will be connected to this wire feeder.
The acceptable level of input voltage is indicated in the
section „Technical Specifications” and on the rating plate
of the power source. Verify the connection of grounding
wires from the power source to the input source.

English 6 English
Controls and Operational Features
Front panel LF 52D
1
2 3
4
5
Figure 1
Front panel LF 56D
1
4
2 3
6
7
Figure 2
1. EURO socket: For connecting a welding gun
(for GMAW, FCAW process).
2. Quick coupling socket: Coolant outlet
(supplies cool coolant to the welding gun).
3. Quick coupling socket: Coolant inlet (takes
warm coolant from the welding gun).
WARNING
Maximum coolant pressure is 5 bar.
4. Output Socket for the Welding Circuit: For
connecting a wire with an electrode holder.
5. U0 User Interface (LF 52D): See „User Interface”
section.
6. Remote Control Connector Plug (LF 56D
only): For connecting a Remote Control Kit
or Cross Switch welding gun.
7. U7 User Interface (LF 56D): See „User Interface”
section.
Back panel LF 52D, LF 56D
8
9
10
11
12
Figure 3
8. Gas quick coupling socket: For connecting a
gas pipe.
WARNING
The machine allows the use all suitable shielding gases
with a maximum pressure of 5 bar.
9. Control Socket: 5 pins socket for connecting
the power source. The CAN protocol is used
for communication between the power
source and wire feeder.
10. Current Socket:
For connecting a welding cable.
11. Quick coupling socket: Coolant inlet
(supplies cool coolant from cooler to the
welding machine).
12. Quick coupling socket: Coolant outlet (takes
warm coolant from welding machine to
cooler).
13. Gas Flow Regulator Plug: Gas Flow Regulator can
be purchased separately. See "Accessories" section.
14. Switch: wire feed / gas purge: This switch allows wire
feeding (wire test) and gas flow (gas test) without
switching on the output voltage.

English 7 English
15. USB port (LF 56D only): For connecting the USB
memory and software updates.
16. Wire Spool Holder: For wire spool with maximum
16kg weight. Holder allows mounting plastic, steel
and fiber spools on the 51mm spindle.
WARNING
Be sure that wire spool case has to be completely closed
during welding.
17. Spool with wire: Not supplied as standard.
18. Wire drive: 4-rolls wire drive.
WARNING
The side panel and wire spool case have to be completely
closed during welding.
WARNING
Do not use handle to move the machine during operation.
See "Accessories" section.
LF 52D
13 14 16 17
18
Figure 4
LF 56D
13 14 16 17
18
15
Figure 5
User Interface
Wire feeder LF 52D is based on a standard interface (U0)
with two separate LED displays, while the LF 56D is
based on a 7’’ TFT display.
Standard Interface (U0)
27
26 19 25 24 19
28
21
20
23 22 30
29
Figure 6
19. Display:
Left display: Shows wire feed speed or welding
current. During welding shows the actual welding
current value.
Right display: Shows the welding voltage in volts
units or tuning value (Trim). During welding shows
the actual welding voltage value.
20. Left Knob: Adjusts values on the left display.
21. Right Knob: Adjusts values on the right display.
22. Right Button: Enables scrolling, changing and setting
welding parameters. Quick access.
23. Left Button: Enables changing the welding process
and shielding gas.
24. Thermal Overload Indicator: It indicates that the
machine is overloaded or that the cooling is not
sufficient.
25. Status Indicator: A two color light that indicates
system errors. Normal operation is steady green
light. LED light conditions and their meanings are
described in Table 1.
WARNING
The status light will flash green, and sometimes red and
green when the machine is first turned on. When the
power source is powered it can take as long as 60
seconds for the machine to be ready to weld. This is a
normal situation as the machine goes through
initialization.

English 8 English
Table 1 LED Light Conditions
LED Light
Condition
Meaning
Only machines which using CAN
protocol for communication
Steady Green
Correct operation mode. The power
source communicates normally with
all peripheral equipment.
Blinking Green
Occurs during a system reset, and
indicates that the power source is
mapping (identifying) additional
connected components in the system.
This condition occurs for 1-10
seconds after connecting the power
supply or when the system
configuration is changed during
operation.
Alternating
Green and Red
If the status lights are flashing any
combination of red and green color, it
means that an error is present in the
machine.
Each digit of the code represents the
number of red flashes of the indicator
light. Individual code digits are flashed
in red with a long pause between
digits. If more than one code is
present, the codes will be separated
by green light. Read the error code
before you turn of the machine.
To clear the error, turn off the
machine, wait a few seconds, and
then turn on the machine again. If the
error remains, a maintenance is
required. Please contact the nearest
authorized service center or Lincoln
Electric and report the error code.
Steady Red Indicate no communication in CAN
protocol.
26. LED Indicator: Informs that the left display shows the
wire feed speed.
27. LED Indicator: Informs that the left display shows the
ampere units.
28. LED Indicator: Informs that the right display shows
the volts units.
29. Welding Programs Indicators: LED light indicate the
active manual weld mode. See Table 2.
30. Welding Parameters Indicators: LED light indicate
the active weld parameters. See Table 3.
Welding process change
It is possible to quick recall of one of the six manual
welding programs - Table 2.
Table 2 Manual Weld Modes:
Symbol LED Process
GMAW
GMAW MIX
GMAW CO2
GMAW AR
FCAW
FCAW MIX
FCAW CO2
SMAW
SMAW
To set the welding process:
Press the left button [23], to select the right weld mode
– LED of the current program flashes.
Again press the left button, the active weld mode
indicator will skip to the next program.
WARNING
During switching the displays show a “dotted line” on the
screen.