Lincoln Electric 12644 Service Manual
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Lincoln Electric 12644 Service Manual

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Power Wave ® R450
For use with machines having Code Numbers:
Power Wave R450: 12644, 12645, 12712, 12713
SERVICE MANUAL
SVM283
| Issue Date 18 - Feb
© Lincoln Global, Inc. All Rights Reserved.
12714, 12715

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  • Page 1 Power Wave ® R450 For use with machines having Code Numbers: Power Wave R450: 12644, 12645, 12712, 12713 12714, 12715 SERVICE MANUAL SVM283 | Issue Date 18 - Feb © Lincoln Global, Inc. All Rights Reserved.
  • Page 2 THANK YOU FOR SELECTING A QUALITY PRODUCT BY KEEP YOUR HEAD OUT OF THE FUMES. DON’T get too close to the arc. LINCOLN ELEC TRIC. Use corrective lenses if necessary to stay a reasonable distance away from the arc. READ and obey the Safety Data PLEASE EXAMINE CARTON AND EQUIPMENT FOR Sheet (SDS) and the warning label DAMAGE IMMEDIATELY...

  • Page 3: Section A: Warnings

    MAGNETIC FIELDS MAY W117.2-1974. A Free copy of “Arc Welding Safety” booklet BE DANGEROUS E205 is available from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199. 2.a. Electric current flowing through any conductor BE SURE THAT ALL INSTALLATION, OPERATION, causes localized Electric and Magnetic Fields (EMF).
  • Page 4 S FETY ELECTRIC SHOCK ARC RAYS CAN BURN. CAN KILL. 3.a. The electrode and work (or ground) circuits are 4.a. Use a shield with the proper filter and cover plates to protect your electrically “hot” when the welder is on. Do eyes from sparks and the rays of the arc when welding or not touch these “hot”...
  • Page 5 S FETY WELDING AND CUTTING CYLINDER MAY EXPLODE IF SPARKS CAN CAUSE DAMAGED. FIRE OR EXPLOSION. 7.a. Use only compressed gas cylinders containing the correct shielding gas for the process used 6.a. Remove fire hazards from the welding area. If and properly operating regulators designed for this is not possible, cover them to prevent the welding sparks the gas and pressure used.

  • Page 6: Table Of Contents

    LINCOLN ELECTRIC Power Wave® R450 Service Manual Power Wave® R450 Service Manual Last update: 2018/02/23 POWER WAVE® R450 ..........................1 Service Manual................................1 Block Diagram & Description ..........................3 Troubleshooting & Repair ............................5 HOW TO USE TROUBLESHOOTING GUIDE ....................5 PC BOARD TROUBLESHOOTING PROCEDURES ..................
  • Page 7 LINCOLN ELECTRIC Power Wave® R450 Service Manual LINE SWITCH REMOVAL AND REPLACEMENT PROCEDURE ..............73 INPUT BOARD REMOVAL AND REPLACEMENT PROCEDURE ..............75 DIGITAL CONTROL BOARD REMOVAL AND REPLACEMENT PROCEDURE ..........78 FAN REMOVAL AND REPLACEMENT PROCEDURE ................... 80 POWER CONVERSION BOARD ASSEMBLY REMOVAL AND REPLACEMENT PROCEDURE ......82 CHOPPER BOARD ASSEMBLY REMOVAL AND REPLACEMENT PROCEDURE ..........

  • Page 8: Block Diagram & Description

    To Digital Control Board LINCOLN ELECTRIC Power Wave® R450 Service Manual Board Arclink Electrode Sense Power Soft Start Relay Arclink Electrode Arclink Line Input Sense Control Board Switch Board Receptacle Power Board Board 40VDC Relay Buck/ 400VDC H-Bridge H-Bridge Arclink...
  • Page 9 LINCOLN ELECTRIC Power Wave® R450 Service Manual LINE SWITCH ELECTRODE SENSE BOARD 14 PIN RECEPTACLE 13. 115VAC INVERTER BOARD Applies three phase line power to the Isolates electrode sense lead (67) from Interface between the wire feeder and Receives 200VAC at 50kHz from the machine.

  • Page 10: Troubleshooting & Repair

    Troubleshooting & Repair HOW TO USE TROUBLESHOOTING GUIDE Service and repair should only be performed by Lincoln Electric Factory Trained Personnel. Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty. For your safety and to avoid Electrical Shock, please observe all safety notes and precautions detailed throughout this manual.

  • Page 11: Pc Board Troubleshooting Procedures

    ELECTRIC SHOCK can kill. remove them until installation is complete. • If you return a PC board to The Lincoln Electric Company • Have an electrician install and service this for credit, it must be in the static-shielding bag. This will equipment.

  • Page 12: Troubleshooting Guide

    Correction (PFC) Control Board Test Procedure. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 13 LED is illuminated” in this section. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 14 3. Perform the Digital Control Board Test Procedure. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 15 2. Reduce the workpoint. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 16 3. Make sure the shielding gas flow is adequate. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 17 R450 to the ArcLink wire feeder. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 18 If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.

  • Page 19: Using The Status Led To Troubleshoot System Problems

    NOT APPLICABLE. Indicates auto-mapping has failed. GREEN If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 20 STATUS LED OFF NOT APPLICABLE. SYSTEM OK. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 21 LINCOLN ELECTRIC Power Wave® R450 Service Manual ERROR CODES FOR THE POWER WAVE R350 The following is a list of possible error codes for the Power Wave R450. For a complete listing consult the Power Wave Manager “Lookup Error”. Observe Safety Guidelines detailed in the beginning of this manual.
  • Page 22 LINCOLN ELECTRIC Power Wave® R450 Service Manual Observe Safety Guidelines detailed in the beginning of this manual. INPUT CONTROL BOARD ERROR CODE # INDICATION TYPE Average input current limit has been PERSISTENT AVERAGE INPUT exceeded. Typically indicates short term CURRENT LIMIT power overload.
  • Page 23 LINCOLN ELECTRIC Power Wave® R450 Service Manual Observe Safety Guidelines detailed in the beginning of this manual. MAIN CONTROL BOARD (“STATUS” LIGHT) ERROR CODE # INDICATION TYPE Indicates over temperature. Usually TEMPORARY accompanied by thermal LED. Check fan operation. Be sure process does not exceed THERMAL ERROR duty cycle limit of the machine.
  • Page 24 LINCOLN ELECTRIC Power Wave® R450 Service Manual Observe Safety Guidelines detailed in the beginning of this manual. ERROR CODE # INDICATION TYPE Indicates communication link between TEMPORARY main control board and chopper has errors. Check the communication link between the control board and the chopper board.

  • Page 25: Test Procedures

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 26 LINCOLN ELECTRIC Power Wave® R450 Service Manual REPLACEMENT PROCEDURE 1. Carefully position the roof onto the machine. Using a 5/16” nutdriver, attach the two screws securing the roof to the machine. 3. Carefully position each handle onto the machine. Using a 7/16” nutdriver, attach the four screws and washers securing each handle to the machine (eight screws and washers total).

  • Page 27: Capacitor Discharge Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 28 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.2 – Capacitor Discharge Test Point Locations...

  • Page 29: Power Factor Correction (Pfc) Control Board Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 30 Power Wave® R450 Service Manual LINCOLN ELECTRIC Figure F.3 – PFC Control Board Location...
  • Page 31 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.4 – PFC Control Board LED and Test Points Table F.1 – PFC Control Board LED Description and Functions COLOR FUNCTION GREEN Status is OK RED/FLASHING Error Code (Blinking) Fault on “B” side of bridge...
  • Page 32 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.2 – PFC Control Board Error Codes ERROR CODE NUMBER EXPLANATION Peak input current limit Start up current check failure Start up current check failure Thermal fault Precharge failure Input power limit...
  • Page 33 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.4 – PFC Control Board Diode Checks DESCRIPTION POSITIVE METER LEAD NEGATIVE METER LEAD EXPECTED READINGS +/- 10%* MAIN BUCK DRIVE “A” PLUG J23A PIN 8 PLUG J23A PIN 16 0.130VDC AUX. BUCK DRIVE “A”...

  • Page 34: Digital Control Board Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 35 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.5 – Digital Control Board Location...
  • Page 36 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.6 – Digital Control Board LED and Test Point Locations Table F.5 – Digital Control Board LED Description and Functions LED NUMBER COLOR FUNCTION GREEN STATUS IS OK ERROR CODE (BLINKING) GREEN...
  • Page 37 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.6 – Digital Control Board Voltage Test Points and Expected Readings DESCRIPTION TEST POINTS LEAD NUMBERS EXPECTED CONDITIONS READINGS INPUT SUPPLY J4 PIN 2 LEAD 356 (–) 40VDC INPUT POWER FROM APPLIED TO...

  • Page 38: Optional User Interface Kit Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 39 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.7 – User Interface and Remote Interface Board Locations Figure F.8 – Input rectifier test point locations...
  • Page 40 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.9 – User Interface Board Test Points...
  • Page 41 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.8 – Voltage Checks On Remote Interface Board DESCRIPTION TEST POINT METER TEST POINT METER EXPECTED CONDITIONS PROBE (+) PROBE (-) READINGS 40VDC BUS PLUG J114 PIN 6 PLUG J114 PIN 4...
  • Page 42 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.10 – Resistance Checks DESCRIPTION TEST POINT TEST POINT EXPECTED CONDITIONS METER METER READINGS PROBE (+) PROBE (-) CONTINUITY PLUG J111 PIN ZERO POWER TO CHECK FROM RECEPTACLE OHMS MACHINE PLUG J111 TO...

  • Page 43: Power Conversion Assembly Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 44 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.10 – Power Conversion Assembly Location...
  • Page 45 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.11 – Diode Tests NOTE: Make sure the input power is removed from the Power Wave® S500 and the three leads are removed from terminal B56 and electrically isolated from each other. See Figure F.11. When test is complete reconnect the three leads to terminal B56.
  • Page 46 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.11 – Power Conversion Assembly Diode Test Points...
  • Page 47 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.12 – Power Conversion Assembly Voltage Check Test Points...
  • Page 48 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.12 – Power Conversion LED Legend LED NUMBER DESCRIPTION CONDITIONS LED STATUS LED 1 BOTTOM BOOST INPUT POWER IGBT DRIVE (472VAC) APPLIED AND MACHINE “ON” LED 2 BOTTOM BUCK INPUT POWER IGBT DRIVE (472VAC) APPLIED AND MACHINE “ON”...
  • Page 49 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.13 – Power Conversion Assembly Voltage Tests DESCRIPTION TEST POINT TEST POINT EXPECTED CONDITIONS READINGS INPUT TO TOP B29(+) B28(–) 635VDC 472VAC INPUT AND BUCK/BOOST MACHINE “ON” CIRCUIT INPUT TO BOTTOM B17(+) B18(–)

  • Page 50: Multi-Phase Output Choke Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 51 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.13 – Test Component Locations...
  • Page 52 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.14 – Multi-Phase Output Chopper Board Lead Locations...

  • Page 53: Current Transducer Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 54 LINCOLN ELECTRIC Power Wave® R450 Service Manual For the following steps refer to the information in the Diagnostic Utility found on the Lincoln Service Navigator or at www.Powerwavemanager.com. Using the Ethernet cross connect cable, connect a laptop computer to the Power Wave R450 via the Ethernet port located at the top rear of the machine.
  • Page 55 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.15 – Current Transducer Test Component Locations...
  • Page 56 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.16 – Digital Control Board Test Points Figure F.17 – Multi-Phase Chopper Board Test Points...
  • Page 57 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.14 – Current Transducers Supply Voltage Checks DESCRIPTION TEST POINT TEST POINT EXPECTED CONDITIONS READINGS SUPPLY VOLTAGE J42 PIN 1 LEAD 216 J42 PIN 4 LEAD 218 +15VDC MACHINE “ON” TO MULTI-PHASE...
  • Page 58 LINCOLN ELECTRIC Power Wave® R450 Service Manual Output Control Transducer OUTPUT CURRENT TEST POINT TEST POINT EXPECTED READING (AMPS) J8 PIN 1 LEAD 211 J8 PIN 6 LEAD 214 4.0VDC J8 PIN 1 LEAD 211 J8 PIN 6 LEAD 214 3.6VDC...

  • Page 59: 40V Dc Bus Board Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 60 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.18 – 40 Volt DC Bus Board Location...
  • Page 61 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.19 – 40 Volt DC Bus Board Test Points Table F.16 – 40 Volt DC Bus Board Test Points and Expected Readings DESCRIPTION TEST POINT TEST POINT EXPECTED READING INPUT FROM THE PLUG J48 PIN 1 (+) PLUG J48 PIN 3 (–)

  • Page 62: Input Board Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 63 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.20 – Input Board Location...
  • Page 64 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.17 – Input Board Diode Checks DESCRIPTION TEST POINT METER TEST POINT METER EXPECTED READING PROBE (+) PROBE (-) SMALL 3-PHASE J1 PIN 3 ON BOARD .578V RECTIFIER PLUG REMOVED SMALL 3-PHASE J1 PIN 3 ON BOARD .578V...
  • Page 65 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.21 – Input Board Test Point Location Table F.18 – Input Board Voltage Test Points and Expected Readings (Nominal 460VAC Applied) DESCRIPTION TEST POINT TEST POINT EXPECTED READING THREE-PHASE INPUT AC LINE VOLTAGE (Ex.

  • Page 66: Multi-Phase Chopper Board Test Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 67 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.22 – Multi-Phase Chopper Board Location...
  • Page 68 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.23 – Multi-Phase Chopper Board Test Points Table F.19 – Multi-Phase Chopper Board Diode Checks NOTE: Prior to testing make sure the input power is removed from the Power Wave® S500 machine and that all leads are removed from terminals B1 and B2 on the Multi-Phase Chopper Board.
  • Page 69 LINCOLN ELECTRIC Power Wave® R450 Service Manual Table F.20 – Multi-Phase Chopper Board Voltage Test Points and Expected Readings MODE OPEN CIRCUIT TEST POINT (+) TEST POINT (-) EXPECTED VOLTAGE READING (+/- 10%) 24VDC 97VDC 24VDC 73VDC 24VDC 73VDC 24VDC...

  • Page 70: Removal And Replacement Procedures

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 71 LINCOLN ELECTRIC Power Wave® R450 Service Manual 6. Perform the Retest After Repair Procedure. Figure F.25 – Power Factor Correction (PFC) Control Board Location...
  • Page 72 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.26 – Power Factor Correction (PFC) Control Board Plug Locations...

  • Page 73: Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 74 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.27 – 115 Volt Supply Board Location Figure F.28 – 115 Volt Supply Board Lead Locations...
  • Page 75 If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 76 LINCOLN ELECTRIC Power Wave® R450 Service Manual FIGURE F.29 – 40 Volt DC Bus Board Location...
  • Page 77 LINCOLN ELECTRIC Power Wave® R450 Service Manual FIGURE F.30 – 40 Volt DC Bus Board Mounting Nut and Lead Locations...

  • Page 78: Line Switch Removal And Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 79 LINCOLN ELECTRIC Power Wave® R450 Service Manual 18. Perform the Case Cover Replacement Procedure. 19. Perform the Retest After Repair Procedure. Figure F.31 – Line Switch Location...

  • Page 80: Input Board Removal And Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 81 LINCOLN ELECTRIC Power Wave® R450 Service Manual Using a 7/16” wrench, attach leads B1, B2 and B3 to the new Input Board. Torque to 50 to 60 Inch Pounds. See Figure F.33. See Wiring Diagram. Replace the input board cover using three new cable ties. Figure F.32.
  • Page 82 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.33 – Input Board Lead Locations...

  • Page 83: Digital Control Board Removal And Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 84 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.34 – Digital Control Board Location Figure F.35 – Digital Control Board Lead Locations...

  • Page 85: Fan Removal And Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 86 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.36 – Fan Assembly Component Locations...

  • Page 87: Power Conversion Board Assembly Removal And Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 88 LINCOLN ELECTRIC Power Wave® R450 Service Manual 11. Using a 7/16” wrench, label and disconnect the leads B4 and B5 from the buss bars. See Figure F.38. See Wiring Diagram. NOTE: Save the bolts, lock washers and nuts for reassembly.
  • Page 89 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.37 – Power Conversion Board Assembly Location...
  • Page 90 LINCOLN ELECTRIC Power Wave® R450 Service Manual Figure F.38 – Power Conversion Board Assembly Lead Locations...

  • Page 91: Chopper Board Assembly Removal And Replacement Procedure

    If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
  • Page 92 LINCOLN ELECTRIC Power Wave® R450 Service Manual REPLACEMENT PROCEDURE 1. Carefully position the new Chopper Board and heat sink assembly onto the four mounting posts. Note: The bottom of the Chopper Board Assembly will have to be positioned into place first.
  • Page 93 LINCOLN ELECTRIC Power Wave® R450 Service Manual FIGURE F.40 – Chopper Board Lead Locations...

  • Page 94: Retest After Repair

    LINCOLN ELECTRIC Power Wave® R450 Service Manual RETEST AFTER REPAIR Retest a machine: • If it is rejected under test for any reason that requires you to remove any part which could affect the machine’s electrical characteristics. • If you repair or replace any electrical components.

This manual is also suitable for:

Power wave r4501264512712127131271412715

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