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Fabricator EM 401i,
Fabricator EM 501i
Instruction manual
Valid for: Serial number:
OP110YY-XXXXXX
0446 455 001   GB   20210630

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Bedr Sghaier
April 16, 2025

Comment utiliser le poste fabricator 401 i

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1 comments:
Mr. Anderson
May 9, 2025

To use the ESAB Fabricator EM 401i:

1. Installation:
- Disconnect mains power before installation.
- Wait at least 2 minutes for DC bus capacitors to discharge.
- Properly connect the earth wire and install ferrites, washers, nuts, and screws as shown in the manual.
- Use suitable supply cables and fuses based on region-specific regulations.

2. Connections:
- Connect the welding cable to the (+) terminal and the return cable to the (–) terminal.
- Plug in the wire feed unit to the dedicated connection port.
- Use the AC socket for the gas regulator.
- Connect coolant lines if using a cooling unit (RED for return, BLUE for supply).
- Turn on the main power switch.

3. Operation:
- Follow all safety procedures in the manual.
- Do not touch the welding head or workpiece during operation.
- Use the front control panel to set welding parameters such as arc current and voltage.
- Use the handle to move the machine; do not pull on cables.

4. Modes:
- Suitable for MIG, flux-cored, and stick (MMA) welding.
- Do not use DC in MIG mode unless authorized by ESAB service.

5. Cooling Unit:
- If used, fill coolant and monitor levels.
- Turn on cooling unit power switch.

6. Maintenance:
- Perform routine maintenance as described in the manual.

Always refer to the manual before operation.

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Summary of Contents for ESAB Fabricator EM 401i

  • Page 1 Fabricator EM 401i, Fabricator EM 501i Instruction manual Valid for: Serial number: OP110YY-XXXXXX 0446 455 001   GB   20210630...
  • Page 3: Table Of Contents

    MAINTENANCE ......................... Maintenance ....................Routine maintenance ....................... Power source ........................Cooling unit ......................Filling the coolant ........................ TROUBLESHOOTING ....................... ORDERING SPARE PARTS ......................... ORDERING NUMBERS ..........................BLOCK DIAGRAM ............................. ACCESSORIES 0446 455 001 - 3 - © ESAB AB 2021...
  • Page 4: Safety

    (SDSs). 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.
  • Page 5 If equipped with ESAB cooler Use ESAB approved coolant only. Non-approved coolant might damage the equipment and jeopardize product safety. In case of such damage, all warranty undertakings from ESAB cease to apply. Recommended ESAB coolant ordering number: 0465 720 002. For ordering information, see the "ACCESSORIES" chapter in the instruction manual.
  • Page 6 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. 0446 455 001 - 6 -...
  • Page 7: Introduction

    2   INTRODUCTION INTRODUCTION The Fabricator EM 401i and Fabricator EM 501i are welding power sources intended for MIG/MAG welding, welding with powder filled cored wire (FCAW-S) and welding with coated electrodes (MMA). The power sources are intended for use with the following wire feed units: •...
  • Page 8: Technical Data

    Fabricator EM 501i with cooling unit Mains voltage 380-415 V ±10%, 50/60 Hz Mains supply S 6.2 MVA scmin Primary current I 380 V 400 V 415 V MIG/MAG 39 A 37 A 36 A 41 A 38 A 37 A Setting range (DC) 0446 455 001 - 8 - © ESAB AB 2021...
  • Page 9 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. 0446 455 001 - 9 - © ESAB AB 2021...
  • Page 10 3   TECHNICAL DATA Application class The symbol indicates that the power source is designed for use in areas with increased electrical hazard. 0446 455 001 - 10 - © ESAB AB 2021...
  • Page 11: Installation

    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. Location Position the power source so that cooling air inlets and outlets are not obstructed. Lifting instructions 0446 455 001 - 11 - © ESAB AB 2021...
  • Page 12: Mains Supply

    A protective earth connection must be made in accordance with regulations. The power source will automatically adjust to the supplied input voltage. Recommended MCB sizes and minimum cable area Fabricator EM 401i / EM 401i with cooling unit Mains voltage 380 V 3~ 50/60 Hz 400 V 3~ 50/60 Hz 415 V 3~ 50/60 Hz...
  • Page 13 If the mains cable needs to be changed, the earth connection to the bottom plate and the ferrites must be installed correctly. See the picture below for the installation order of the ferrites, washers, nuts and screws. 0446 455 001 - 13 - © ESAB AB 2021...
  • Page 14: Operation

    6 Mains power supply switch, ON/OFF 13 Connection BLUE for coolant from cooling unit 7 Mains cable inlet WARNING! Do not use DC- in MIG mode, if DC- needed, please contact authorised ESAB local service. 0446 455 001 - 14 - © ESAB AB 2021...
  • Page 15 NOTE! Gas options are only for solid wires and not for cored wires. Welding control Selects the welding control mode (2T, 4T, 4T repeat). See chapter "5.3 Welding control mode". 0446 455 001 - 15 - © ESAB AB 2021...
  • Page 16 This parameter is used in conjunction with burn-back voltage and burn-back time 0446 455 001 - 16 - © ESAB AB 2021...
  • Page 17: Welding Control Mode

    When the switch is released the repeated ending arc stops. If the switch is not pressed in again within 2 seconds, the welding with repeated ending arc stops. 0446 455 001 - 17 - © ESAB AB 2021...
  • Page 18 5   OPERATION 2-stroke mode (welding without ending arc) 4-stroke mode (welding with ending arc) 0446 455 001 - 18 - © ESAB AB 2021...
  • Page 19: Connection Of Welding And Return Cable

    +40°C and normal 10minutes cycle Duty cycle Cable size mm Voltage drop/10m 100% 250 A 280 A 320 A 0.352 V / 100 A 310 A 350 A 420 A 0.254 V / 100 A 375 A 440 A 530 A 0.189 V / 100 A 0446 455 001 - 19 - © ESAB AB 2021...
  • Page 20: Symbols And Functions

    The fan will run during the startup of the machine and will continue to run only for 10 minutes if there is no operation. In Fabricator EM 401i when the welding current is less than 200A, the fan will run at low speed, if the welding current goes above 200A, the fan will run at high speed.
  • Page 21: Usage Of The Cooling Unit

    The pump has an enclosed pressure relief valve. The valve opens gradually when the pressure is too high. This can occur if a hose is folded, which causes the flow to fail or stop. 0446 455 001 - 21 - © ESAB AB 2021...
  • Page 22: Maintenance

    To maintain the performance and increase the lifetime of the power source it is mandatory to clean it regularly. How often depends on: • the welding process • the arc time 0446 455 001 - 22 - © ESAB AB 2021...
  • Page 23 7. Install the plastic cover between the heat sink and the fan (1) and make sure it is correctly fitted against the heat sink. 8. After having finished cleaning the power source, reattach the power source panels in the reverse order. 0446 455 001 - 23 - © ESAB AB 2021...
  • Page 24: Cooling Unit

    Then drain the tank manually, that is empty via the tank’s filling hole. Filling the coolant Only use ESAB’s ready mixed coolant, see the “ACCESSORIES” chapter. • Fill with coolant. (The fluid level must not exceed the upper marking but must not be below lower marking.)
  • Page 25: Troubleshooting

    Input power Verify that all the overvoltage occurs. three input phases Input power under are present. voltage occurs. Input power phase imbalance occurs. The input power frequency exceeds the range. 0446 455 001 - 25 - © ESAB AB 2021...
  • Page 26 The PCB is not Refer note below the certified. table None Overcurrent of wire The welding wire is Check whether the feeder motor blocked or jammed welding wire is blocked or jammed 0446 455 001 - 26 - © ESAB AB 2021...
  • Page 27 • Check the on/off switch on the cooling unit is set to ON CAUTION! Repair and electrical work should be performed by an authorised ESAB service technician. Use only ESAB original spare and wear parts. 0446 455 001 - 27 -...
  • Page 28: Ordering Spare Parts

    Spare parts and wear parts can be ordered through your nearest ESAB dealer, see esab.com. When ordering, please state product type, serial number, designation and spare part number in accordance with the spare parts list.
  • Page 29: Ordering Numbers

    Type Notes 0446 400 884 Power source Fabricator EM 401i 0446 400 883 Power source Fabricator EM 401i with cooling unit 0446 400 882 Power source Fabricator EM 501i with cooling unit 0446 455 * Instruction manual 0463 802 001 Service manual The three last digits in the document number of the manual show the version of the manual.
  • Page 30: Block Diagram

    APPENDIX BLOCK DIAGRAM 0446 455 001 - 30 - © ESAB AB 2021...
  • Page 31: Accessories

    ESAB ready mixed coolant (10 l / 2.64 gal) Use of any other cooling liquid than the prescribed one might damage the equipment. In case of such damage, all warranty undertakings from ESAB cease to apply. 0447 014 001 Converter plug for gas heater supply 0446 455 001 - 31 - ©...
  • Page 32 For contact information visit http://esab.com ESAB AB, Lindholmsallén 9, Box 8004, 402 77 Gothenburg, Sweden, Phone +46 (0) 31 50 90 00 http://manuals.esab.com...

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Fabricator em 501i

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