Lincoln Electric Flextec 350X Power Connect Service Manual
  1. Manuals
  2. Brands
  3. Lincoln Electric Manuals
  4. Welding System
  5. Flextec 350X
  6. Service manual

Lincoln Electric Flextec 350X Power Connect Service Manual

Hide thumbs Also See for Flextec 350X Power Connect:
Table of Contents

Advertisement

Quick Links

Service Manual
Flextec
Register your machine:
www.lincolnelectric.com/register
Authorized Service and Distributor Locator:
www.lincolnelectric.com/locator
Save for future reference
Date Purchased
Code: (ex: 10859)
Serial: (ex: U1060512345)
SVM10526
| Issue D ate Jul - 20
© Lincoln Global, Inc. All Rights Reserved.
350X Power Connect
®
For use with machines having Code Numbers:
12822, 12946
Need Help? Call 1.888.935.3877
to talk to a Service Representative
Hours of Operation:
8:00 AM to 6:00 PM (ET) Mon. thru Fri.
After hours?
Use "Ask the Experts" at lincolnelectric.com
A Lincoln Service Representative will contact you
no later than the following business day.
For Service outside the USA:
Email: globalservice@lincolnelectric.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Flextec 350X Power Connect and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Lincoln Electric Flextec 350X Power Connect

Summary of Contents for Lincoln Electric Flextec 350X Power Connect

  • Page 1 Service Manual Flextec 350X Power Connect ® For use with machines having Code Numbers: 12822, 12946 Need Help? Call 1.888.935.3877 Register your machine: to talk to a Service Representative www.lincolnelectric.com/register Authorized Service and Distributor Locator: Hours of Operation: www.lincolnelectric.com/locator 8:00 AM to 6:00 PM (ET) Mon. thru Fri. Save for future reference After hours? Use “Ask the Experts”...

  • Page 2: Table Of Contents

    Table of Contents Flextec > Flextec 350X Power Connect - 12822 USING THE STATUS LED TO TROUBLESHOOT SYSTEM PROBLEMS ..................5 TROUBLESHOOTING GUIDE ..............................7 General Description................................10 Input Section ................................... 11 Insulated Gate Bipolar Transistor (IGBT) Operation......................12 Inverter Control Board And Switchboard ..........................13 Main Transformer...................................
  • Page 3 This page intentionally left blank...
  • Page 4 This page intentionally left blank...
  • Page 5 This page intentionally left blank...

  • Page 6: Using The Status Led To Troubleshoot System Problems

    0000178409 USING THE STATUS LED TO TROUBLESHOOT SYSTEM PROBLEMS Observe Safety Guidelines detailed in the beginning of this manual. Errors are displayed on the user interface. In addition, there are status lights on the User Interface board and the Switchboard that contain error sequences. Included in this section is information about the status lights and some basic troubleshooting charts for both machine and weld performance.
  • Page 7 0000178409 ERROR DESCRIPTION POSSIBLE CAUSE CORRECTIVE ACTION CODE NUMBER cable connections. Verify proper connections of main internal power components. Power must be cycled to the machine to reset the error. Thermal Fault. Machine shut off output Check for material blocking due to elevated internal intake or exhaust louvers.

  • Page 8: Troubleshooting Guide

    FUNCTION PROBLEMS PROBLEMS (SYMPTOMS) POSSIBLE AREAS OF MISADJUSTMENT(S) RECOMMENDED COURSE OF ACTION Major mechanical or Contact your local Lincoln Authorized Contact the Lincoln Electric electrical damage is Field Service Facility. Service Department at evident. 1-888-935-3877. The machine is “dead”. Make sure the line switch is in the ON...
  • Page 9 0000178481 PROBLEMS (SYMPTOMS) POSSIBLE AREAS OF MISADJUSTMENT(S) RECOMMENDED COURSE OF ACTION Perform the Mode Select Switch Test Procedure. The thermal LED is “ON”. The welding application may be Perform the Thermostat #1 The machine regularly exceeding the duty cycle and/or limits of and #2 Circuit Test overheats.
  • Page 10 0000178481 WELDING PROBLEMS PROBLEMS POSSIBLE AREAS OF MISADJUSTMENT(S) RECOMMENDED COURSE OF ACTION (SYMPTOMS) There is a general Make sure the correct input power is Perform the Choke Test degradation of the being applied to the machine. Procedure. welding performance. Make sure the machine’s controls are Perform the Current Transducer set correctly for the welding process (LEM) Test Procedure.

  • Page 11: General Description

    Using CrossLink the operator can adjust the open circuit voltage on the Flextec 350X Power Connect™ from the compatible wire feeder. This is accomplished by sending a 1000 Hz pulse through the welding cables.

  • Page 12: Input Section

    0000178340 Input Section Input section LECOL_EMBEDDEDIMG_0000178341_x.png Figure 1. Input section When a single or three phase input voltage is applied through the line switch to the input / precharge SCR bridge board the AC input voltage is rectified and controlled. This rectified voltage is applied, via the PFC boost board, to the auxiliary power board.

  • Page 13: Insulated Gate Bipolar Transistor (Igbt) Operation

    0000178335 Insulated Gate Bipolar Transistor (IGBT) Operation Insulated gate bipolar transistor (IGBT) operation LECOL_EMBEDDEDIMG_0000178336_x.png Figure 1. Insulated gate bipolar transistor (IGBT) operation An IGBT is a type of transistor. IGBT are semiconductors well suited for high frequency switching and high current applications.

  • Page 14: Inverter Control Board And Switchboard

    The inverter control board also controls the cooling fans speed. The inverter control board also monitors the thermostat and thermistor circuits. In addition, it monitors the Crosslinc circuit and turns on the green LED when the Flextec 350X Power Connect™ is connected to a compatible crosslinc wirefeeder.

  • Page 15: Main Transformer

    0000178350 Main Transformer Main transformer LECOL_EMBEDDEDIMG_0000178351_x.png Figure 1. Main transformer The main transformer is a step-down transformer. The primary windings receive the high voltage pulse width modulated power from the switch board. The 25 KHz AC output that is created on the center tapped weld secondary winding is applied to the output rectifiers.

  • Page 16: Output Rectifier And Choke

    0000178348 Output Rectifier And Choke Output rectifier, choke and current transducer LECOL_EMBEDDEDIMG_0000178349_x.png Figure 1. Output rectifier, choke and current transducer There are two output diode modules mounted to a heatsink. The AC output of the center tapped weld secondary winding, of the main transformer, is full wave rectified by the output rectifier. The resultant DC output has a 50 KHz ripple content.

  • Page 17: Pulse Width Modulation

    0000178337 Pulse Width Modulation Typical IGBT outputs LECOL_EMBEDDEDIMG_0000178338_x.png Figure 1. Typical IGBT outputs The term Pulse Width Modulation is used to describe how much time is devoted to conduction in the positive and negative portions of the cycle. Changing the pulse width is known as modulation. Pulse Width Modulation (PWM) is the varying of the pulse width over the allowed range of a cycle to affect the output of the machine.
  • Page 18 0000178337 By controlling the duration of the gate signal, the IGBT is turned on and off for different durations during the cycle. The top drawing in Figure E.7 shows the minimum output signal possible over a 40-microsecond time period. The positive portion of the signal represents one IGBT group1 conducting for one microsecond. The negative portion is the other IGBT group1.

  • Page 19: Thermal Protection

    If the temperature continues to rise and exceeds a set limit then the welding output will be disabled and the thermal symbol will illuminate. Protective Circuits Protective circuits are designed into the Flextec 350X Power Connect™ to sense trouble and shut down the machine before damage occurs to the machine’s internal components. 1(1)

  • Page 20: User Interface (Ui) Board

    0000178352 User Interface (UI) Board User interface (UI) board LECOL_EMBEDDEDIMG_0000178353_x.png Figure 1. User interface (UI) board The UI board is powered by the 42 VDC received from the auxiliary power board. LED 5 indicates that the on- board power supply if functioning. Led 4 is the Arclink status indicator. The user controls, switches, and connectors allow the operator to communicate to the UI board the desired processes and welding requirements.
  • Page 21 WARNING: Type of Hazard: 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 22: Auxiliary Power Board Test Procedure

    WARNING: Type of Hazard: 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 23 0000178375 Auxiliary power board voltage tests TEST POINT TEST POINT EXPECTED READING PLUG J49 PIN 1 (LEAD B2C) PLUG J49 PIN 6 (LEAD B1C) 860 VDC PLUG J49 PIN 12 (LEAD 444) PLUG J49 PIN 11 (LEAD 441) 18 VDC PLUG J45 PIN 2 (LEAD 465) PLUG J45 PIN 1 (LEAD 466) 5 VDC...
  • Page 24 0000178375 Auxiliary power board location LECOL_EMBEDDEDIMG_0000178378_x.png Figure 1. Auxiliary power board location 3(5)
  • Page 25 0000178375 Auxiliary power board plug locations LECOL_EMBEDDEDIMG_0000178377_x.png Figure 2. Auxiliary power board plug locations 4(5)
  • Page 26 0000178375 Auxiliary power board lead locations LECOL_EMBEDDEDIMG_0000178376_x.png Figure 3. Auxiliary power board lead locations 5(5)

  • Page 27: Boost Rectifier Test Procedure

    WARNING: Type of Hazard: 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 28 0000178482 Table F.1 - Boost rectifier diode drop tests TEST POINT TEST POINT EXPECTED READING AC TERMINAL (LEAD X21) POSITIVE TERMINAL (POS) 0.3 VDC – 1.0 VDC NEGATIVE TERMINAL (NEG) AC TERMINAL (LEAD X21) 0.3 VDC – 1.0 VDC NEGATIVE TERMINAL (NEG) AC TERMINAL (LEADS 202A AND 202B) 0.3 VDC –...
  • Page 29 0000178482 Boost rectifier location LECOL_EMBEDDEDIMG_0000178465_x.png Figure 1. Boost rectifier location 3(5)
  • Page 30 0000178482 Transformer and positive boost lead connection locations LECOL_EMBEDDEDIMG_0000178464_x.png Figure 2. Transformer and positive boost lead connection locations 4(5)
  • Page 31 0000178482 Boost rectifier terminal and lead locations LECOL_EMBEDDEDIMG_0000178483_x.png Figure 3. Boost rectifier terminal and lead locations 5(5)

  • Page 32: Boost Relay Test Procedure

    WARNING: Type of Hazard: 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 33 0000178469 Boost relay location LECOL_EMBEDDEDIMG_0000178471_x.png Figure 1. Boost relay location 2(3)
  • Page 34 0000178469 Boost relay terminal and lead locations LECOL_EMBEDDEDIMG_0000178470_x.png Figure 2. Boost relay terminal and lead locations 3(3)

  • Page 35: Capacitor Discharge Procedure

    WARNING: Type of Hazard: 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 36 0000178359 SCR (pre-charge) board, input rectifier and main capacitor board locations LECOL_EMBEDDEDIMG_0000178362_x.png Figure 1. SCR (pre-charge) board, input rectifier and main capacitor board locations 2(4)
  • Page 37 0000178359 Input rectifier terminals B5 and B6 LECOL_EMBEDDEDIMG_0000178361_x.png Figure 2. Input rectifier terminals B5 and B6 3(4)
  • Page 38 0000178359 Main capacitor board terminals B1 and B2 LECOL_EMBEDDEDIMG_0000178360_x.png Figure 3. Main capacitor board terminals B1 and B2 4(4)

  • Page 39: Choke Test Procedure

    WARNING: Type of Hazard: 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 40 0000178441 Choke location LECOL_EMBEDDEDIMG_0000178442_x.png Figure 1. Choke location 2(2)

  • Page 41: Current Transducer (Lem) Test Procedure

    WARNING: Type of Hazard: 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 42 0000178455 14. Perform the Case Cover Replacement Procedure. Table F.1 - DC supply voltages from inverter control board DESCRIPTION TEST POINT (POS) TEST POINT (NEG) EXPECTED READING POSITIVE VOLTAGE SUPPLY PLUG J11 PIN 4 (LEAD 216A) PLUG J11 PIN 9 (LEAD 218A) +15 VDC NEGATIVE VOLTAGE PLUG J11 PIN 5 (LEAD 217A)
  • Page 43 0000178455 Inverter control board location LECOL_EMBEDDEDIMG_0000178458_x.png Figure 1. Inverter control board location 3(5)
  • Page 44 0000178455 Plug J11 location on inverter control board LECOL_EMBEDDEDIMG_0000178457_x.png Figure 2. Plug J11 location on inverter control board 4(5)
  • Page 45 0000178455 Plug J11 lead locations LECOL_EMBEDDEDIMG_0000178456_x.png Figure 3. Plug J11 lead locations 5(5)

  • Page 46: Fan And F.a.n. Circuit Test Procedure

    WARNING: Type of Hazard: 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 47 0000178461 Table F.1 - Fan voltage tests TEST TEST POINT TEST POINT CONDITIONS EXPECTED DESCRIPTION READING BOTTOM FAN PLUG J13 PLUG J13 PIN FAN NOT RUNNING 0 VDC PIN 4 (RED 3 (BLACK WIRE +) WIRE -) TOP FAN PLUG J14 PLUG J14 PIN FAN NOT RUNNING 0 VDC...
  • Page 48 0000178461 Inverter control board location LECOL_EMBEDDEDIMG_0000178463_x.png Figure 1. Inverter control board location 3(4)
  • Page 49 0000178461 Inverter control board plugs J13 and J14 locations LECOL_EMBEDDEDIMG_0000178462_x.png Figure 2. Inverter control board plugs J13 and J14 locations 4(4)

  • Page 50: Input Rectifier And Scr (Pre-Charge) Board Test Procedure

    WARNING: Type of Hazard: 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 51 0000178382 Table F.1 - Input rectifier diode drop tests TEST POINT TEST POINT EXPECTED READING TERMINAL L1 POSITIVE TERMINAL (B6) 0.3 VDC – 1.0 VDC TERMINAL L2 POSITIVE TERMINAL (B6) 0.3 VDC – 1.0 VDC TERMINAL L3 POSITIVE TERMINAL (B6) 0.3 VDC –...
  • Page 52 0000178382 Input rectifier and SCR (pre-charge) board locations LECOL_EMBEDDEDIMG_0000178365_x.png Figure 1. Input rectifier and SCR (pre-charge) board locations 3(4)
  • Page 53 0000178382 Input rectifier terminal and SCR (pre-charge) board plug J40 locations LECOL_EMBEDDEDIMG_0000178364_x.png Figure 2. Input rectifier terminal and SCR (pre-charge) board plug J40 locations SCR (pre-charge) board plug J40 lead locations LECOL_EMBEDDEDIMG_0000178383_x.png Figure 3. SCR (pre-charge) board plug J40 lead locations 4(4)

  • Page 54: Inverter Control Board Test Procedure

    WARNING: Type of Hazard: 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 55 0000178418 DESCRIPTION LOCATION MEANING LED 2 INVERTER ARCLINK SUPPLY ON CONTROL BOARD LED 1 DAUGHTER ARCLINK STATUS INDICATOR STEADY GREEN = SYSTEM OK BLINKING GREEN BOARD = OCCURS DURING STARTUP. NORMAL FOR FIRST 1 TO 30 SECONDS AFTER POWER IS APPLIED. ALTERNATING GREEN AND RED = READ THE ERROR CODE BEFORE THE MACHINE IS POWERED OFF.
  • Page 56 0000178418 Inverter control board location LECOL_EMBEDDEDIMG_0000178422_x.png Figure 1. Inverter control board location 3(5)
  • Page 57 0000178418 Inverter control board test points LECOL_EMBEDDEDIMG_0000178421_x.png Figure 2. Inverter control board test points 4(5)
  • Page 58 0000178418 Inverter control board lead locations LECOL_EMBEDDEDIMG_0000178419_x.png Figure 3. Inverter control board lead locations 5(5)

  • Page 59: Line Switch Test Procedure

    WARNING: Type of Hazard: 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 60 0000178371 Table F.1 - Line switch resistance tests TEST POINT (POS) TEST POINT (NEG) EXPECTED READING SWITCH POSITION WHITE LEAD VERY LOW RESISTANCE (LESS THAN ONE OHM) “ON” POSITION RED LEAD VERY LOW RESISTANCE (LESS THAN ONE OHM) “ON” POSITION BLACK LEAD VERY LOW RESISTANCE (LESS THAN ONE OHM) “ON”...
  • Page 61 0000178371 Line switch location LECOL_EMBEDDEDIMG_0000178373_x.png Figure 1. Line switch location 3(4)
  • Page 62 0000178371 Line switch lead location LECOL_EMBEDDEDIMG_0000178372_x.png Figure 2. Line switch lead location 4(4)

  • Page 63: Main Capacitor Board Test Procedure

    WARNING: Type of Hazard: 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 64 0000178389 Main capacitor board location LECOL_EMBEDDEDIMG_0000178391_x.png Figure 1. Main capacitor board location 2(3)
  • Page 65 0000178389 Main capacitor board terminal and LED locations LECOL_EMBEDDEDIMG_0000178390_x.png Figure 2. Main capacitor board terminal and LED locations 3(3)

  • Page 66: Main Transformer Test Procedure

    WARNING: Type of Hazard: 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 67 0000178428 TEST POINT TEST POINT EXPECTED MACHINE READING CONDITION X12 (AT OUTPUT RECTIFIER X13 (AT NEGATIVE OUTPUT 40 VAC MACHINE ON. BUSS BAR) TERMINAL) Main transformer location LECOL_EMBEDDEDIMG_0000178430_x.png Figure 1. Main transformer location 2(3)
  • Page 68 0000178428 Main transformer test point locations LECOL_EMBEDDEDIMG_0000178429_x.png Figure 2. Main transformer test point locations 3(3)

  • Page 69: Mode Select Switch Test Procedure

    WARNING: Type of Hazard: 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 70 0000178453 SWITCH TEST POINT TEST POINT EXPECTED READING POSITION SMAW PLUG J3 PIN PLUG J3 PIN VERY LOW RESISTANCE (LESS THAN ONE OHM) IN SWITCH 7 (LEAD 302) 1 (LEAD 308) POSTION. HIGH RESISTANCE (GREATER THAN 50OK OHMS) IN ALL OTHER POSITIONS. PLUG J3 PIN PLUG J3 PIN VERY LOW RESISTANCE (LESS THAN ONE OHM) IN SWITCH...
  • Page 71 0000178453 User interface board plug J3 location LECOL_EMBEDDEDIMG_0000178435_x.png Figure 2. User interface board plug J3 location User interface board plug J3 lead locations LECOL_EMBEDDEDIMG_0000178434_x.png Figure 3. User interface board plug J3 lead locations 3(3)

  • Page 72: Output Rectifier Assembly Test Procedure

    WARNING: Type of Hazard: 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 73 0000178423 TEST POINT (POS) TEST POINT (NEG) EXPECTED READING LOWER BUSS BAR OUTPUT RECTIFIER HEATSINK 0.2 VDC – 0.7 VDC Output rectifier assembly location LECOL_EMBEDDEDIMG_0000178404_x.png Figure 1. Output rectifier assembly location 2(3)
  • Page 74 0000178423 Lead X11 and X12 connection point locations LECOL_EMBEDDEDIMG_0000178404_x.png Figure 2. Lead X11 and X12 connection point locations 3(3)

  • Page 75: Pfc Boost Board Test Procedure

    WARNING: Type of Hazard: 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 76 0000178402 TEST POINT TEST POINT EXPECTED READING TERMINAL B7 TERMINAL B2 0.3 VDC – 1.0 VDC TERMINAL B7 TERMINAL B2 GREATER THAN 100K OHMS PFC boost board location LECOL_EMBEDDEDIMG_0000178384_x.png Figure 1. PFC boost board location 2(3)
  • Page 77 0000178402 PFC boost board terminal locations LECOL_EMBEDDEDIMG_0000178403_x.png Figure 2. PFC boost board terminal locations 3(3)

  • Page 78: Retest After Repair

    WARNING: Type of Hazard: 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 79 0000178358 PROCESS DUTY CYCLE PHASES VOLTS (AT RATED AMPS) AMPS GTAW (CC) 100% 20.8 SMAW (CC) SMAW (CC) 100% 30.8 FCAW-GS (CV) FCAW-GS (CV) 100% 27.5 FCAW-SS (CV) FCAW-SS (CV) 100% 27.5 2(2)

  • Page 80: Special Testing Modes

    WARNING: Type of Hazard: 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 81 22. Place the #4 DIP switch in the OFF position. 23. Perform the Case Cover Replacement Procedure. Procedure Steps: Turn off the Flextec 350X Power Connect machine. Perform the Case Cover Removal Procedure. Perform the Capacitor Discharge Procedure. Locate the DIP switch on the user interface board. See Figure F.1.
  • Page 82 21. Place the #4 DIP switch in the OFF position. 22. Perform the Case Cover Replacement Procedure. Procedure Steps: Turn off the Flextec 350X Power Connect machine. Perform the Case Cover Removal Procedure. Perform the Capacitor Discharge Procedure. Locate the DIP switch on the user interface board. See Figure F.3.
  • Page 83 0000178477 14-PIN REMOTE SETTING LEFT DISPLAY RIGHT DISPLAY AT MIN. POSITION TURNING UP INCREASING AT MAX. POSITION 20. Step 3 – Machine Output Control, all models: OUTPUT CONTROL SETTING LEFT DISPLAY RIGHT DISPLAY AT MIN. POSITION TURNING UP INCREASING AT MAX. POSITION 21.
  • Page 84 28. Place the #8 DIP switch in the OFF position. 29. Perform the Case Cover Replacement Procedure. Procedure Steps: Turn off the Flextec 350X Power Connect machine. Perform the Case Cover Removal Procedure. Perform the Capacitor Discharge Procedure. Locate the DIP switch on the user interface board. See Figure F.3.
  • Page 85 32. Place the #8 DIP switch in the OFF position. 33. Perform the Case Cover Replacement Procedure. Procedure Steps: Turn off the Flextec 350X Power Connect machine. Perform the Case Cover Removal Procedure. Perform the Capacitor Discharge Procedure. Locate the DIP switch on the user interface board. See Figure F.3.
  • Page 86 0000178477 13. Cycle the weld terminals switch until the left display shows “ 9”. The right display will show the last three digits of the switchboard software number (Example: S30146-07 is software, then the right display shows “607”). 14. Cycle the weld terminals switch until the left display shows “ 10”. The right display will show the last three digits of the switchboard boot code version.
  • Page 87 0000178477 User interface board DIP switch location and position LECOL_EMBEDDEDIMG_0000178480_x.png Figure 1. User interface board DIP switch location and position 8(10)
  • Page 88 0000178477 User controls locations LECOL_EMBEDDEDIMG_0000178479_x.png Figure 2. User controls locations 9(10)
  • Page 89 0000178477 User interface board DIP switch location and position LECOL_EMBEDDEDIMG_0000178478_x.png Figure 3. User interface board DIP switch location and position 10(10)

  • Page 90: Switchboard Test Procedure

    WARNING: Type of Hazard: 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 91 0000178413 Table F.1 - Switchboard resistance and diode drop tests DESCRIPTION TEST POINT (POS) TEST POINT (NEG) EXPECTED READING CHECKING SWITCHBOARD TERMINAL B4 SWITCHBOARD TERMINAL B2 0.3 TO 1.0 VDC “HIGH-SIDE” IGBTs CHECKING SWITCHBOARD TERMINAL B3 SWITCHBOARD TERMINAL B2 0.3 TO 1.0 VDC “HIGH-SIDE”...
  • Page 92 0000178413 LED FUNCTION NUMBER COLOR GREEN INDICATES SWITCHBOARD IS RECEIVING GATE DRIVE SIGNALS FROM THE INVERTER CONTROL BOARD. GREEN INDICATES SWITCHBOARD IS RECEIVING GATE DRIVE SIGNALS FROM THE INVERTER CONTROL BOARD. GREEN INDICATES SWITCHBOARD IS RECEIVING GATE DRIVE SIGNALS FROM THE INVERTER CONTROL BOARD.
  • Page 93 0000178413 Inverter control board location LECOL_EMBEDDEDIMG_0000178397_x.png Figure 2. Inverter control board location 4(7)
  • Page 94 0000178413 Switchboard terminal and LED locations LECOL_EMBEDDEDIMG_0000178396_x.png Figure 3. Switchboard terminal and LED locations 5(7)
  • Page 95 0000178413 Inverter control board plug J12 location LECOL_EMBEDDEDIMG_0000178395_x.png Figure 4. Inverter control board plug J12 location 6(7)
  • Page 96 0000178413 Inverter control board plug J12 lead locations LECOL_EMBEDDEDIMG_0000178394_x.png Figure 5. Inverter control board plug J12 lead locations 7(7)

  • Page 97: Thermostat #1 And #2 Circuit Test Procedure

    WARNING: Type of Hazard: 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 98 0000178448 16. Using a volt/ohmmeter, check the resistance from plug J3 pin 5 (lead #225) to pin 13 (lead #226). See Figure F.4. Resistance should be less than one ohm. If the resistance is greater than one ohm, there is an open or high resistance connection in the thermostat circuit.
  • Page 99 0000178448 Inverter control board location LECOL_EMBEDDEDIMG_0000178451_x.png Figure 2. Inverter control board location 3(5)
  • Page 100 0000178448 Inverter control board plug J3 location LECOL_EMBEDDEDIMG_0000178450_x.png Figure 3. Inverter control board plug J3 location 4(5)
  • Page 101 0000178448 Inverter control board plug J3 lead locations LECOL_EMBEDDEDIMG_0000178449_x.png Figure 4. Inverter control board plug J3 lead locations 5(5)

  • Page 102: User Interface Board Test Procedure

    WARNING: Type of Hazard: 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 103 0000178405 TEST POINT TEST POINT EXPECTED READING PLUG J1 PIN 5 (LEAD PLUG J1 PIN 3 (LEAD 0 – 3.24 K OHMS DEPENDENT ON OUTPUT CONTROL KNOB 252) 253) POSITION. PLUG J1 PIN 4 (LEAD PLUG J1 PIN 2 (LEAD 0 –...
  • Page 104 0000178405 DESCRIPTION TEST POINT TEST POINT EXPECTED CONDITIONS (POS) (NEG) READING +10 VDC PLUG J1 PIN 7 PLUG J1 PIN 1 10 VDC MACHINE ON. (LEAD #280) (LEAD #282) WELD TERMINALS SWITCH PLUG J3 PIN 9 PLUG J3 PIN 4 0 VDC WELD TERMINALS SWITCH (LEAD #212)
  • Page 105 0000178405 User interface board location LECOL_EMBEDDEDIMG_0000178408_x.png Figure 1. User interface board location 4(5)
  • Page 106 0000178405 User interface board plug and LED locations LECOL_EMBEDDEDIMG_0000178407_x.png Figure 2. User interface board plug and LED locations User interface board lead locations LECOL_EMBEDDEDIMG_0000178406_x.png Figure 3. User interface board lead locations 5(5)

  • Page 107: Auxiliary Power Board Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 108 0000178379 Auxiliary power board plug locations LECOL_EMBEDDEDIMG_0000178381_x.png Figure 1. Auxiliary power board plug locations 2(3)
  • Page 109 0000178379 Auxiliary power board mounting nut locations LECOL_EMBEDDEDIMG_0000178380_x.png Figure 2. Auxiliary power board mounting nut locations 3(3)

  • Page 110: Boost Rectifier Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 111 0000178466 Boost rectifier lead locations LECOL_EMBEDDEDIMG_0000178468_x.png Figure 1. Boost rectifier lead locations 2(3)
  • Page 112 0000178466 Boost rectifier mounting screw locations LECOL_EMBEDDEDIMG_0000178467_x.png Figure 2. Boost rectifier mounting screw locations 3(3)

  • Page 113: Boost Relay Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 114 0000178472 Boost relay terminal locations LECOL_EMBEDDEDIMG_0000178454_x.png Figure 1. Boost relay terminal locations 2(3)
  • Page 115 0000178472 Boost relay cable tie locations LECOL_EMBEDDEDIMG_0000178473_x.png Figure 2. Boost relay cable tie locations 3(3)

  • Page 116: Case Cover Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 117 0000178363 Corner cap, right case side and roof mounting screw locations LECOL_EMBEDDEDIMG_0000178345_x.png Figure 1. Corner cap, right case side and roof mounting screw locations 2(3)
  • Page 118 0000178363 Roof mounting screw locations LECOL_EMBEDDEDIMG_0000178344_x.png Figure 2. Roof mounting screw locations 3(3)

  • Page 119: Choke Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 120 0000178443 REPLACEMENT PROCEDURE Procedure Steps: Carefully position the new choke into the machine. Using a 5/16” nutdriver, attach the two screws securing the choke to the base of the machine. Carefully position the output rectifier assembly into the machine. Using a 5/16” nutdriver, attach the two screws securing the bottom rectifier bracket to the base. Using a 3/8”...
  • Page 121 0000178443 Choke lead and POS lead connection location LECOL_EMBEDDEDIMG_0000178427_x.png Figure 1. Choke lead and POS lead connection location 3(6)
  • Page 122 0000178443 Choke lead and mounting hardware location LECOL_EMBEDDEDIMG_0000178426_x.png Figure 2. Choke lead and mounting hardware location 4(6)
  • Page 123 0000178443 Heatsink holder, cable holder and bottom rectifier bracket locations LECOL_EMBEDDEDIMG_0000178425_x.png Figure 3. Heatsink holder, cable holder and bottom rectifier bracket locations 5(6)
  • Page 124 0000178443 Choke mounting screw locations LECOL_EMBEDDEDIMG_0000178424_x.png Figure 4. Choke mounting screw locations 6(6)

  • Page 125: Current Transducer Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 126 0000178459 NEG lead, X13 lead and mounting hardware locations LECOL_EMBEDDEDIMG_0000178460_x.png Figure 1. NEG lead, X13 lead and mounting hardware locations 2(2)

  • Page 127: Fan Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 128 0000178444 Using a 5/16” nutdriver, attach the four screws securing the brickwork fan guard to the rear of the machine. Perform the Case Cover Replacement Procedure. Perform the Retest After Repair Procedure. Brickwork fan guard and fan bracket mounting screw locations LECOL_EMBEDDEDIMG_0000178447_x.png Figure 1. Brickwork fan guard and fan bracket mounting screw locations 2(4)
  • Page 129 0000178444 Inverter control board plug J13 and J14 locations LECOL_EMBEDDEDIMG_0000178446_x.png Figure 2. Inverter control board plug J13 and J14 locations 3(4)
  • Page 130 0000178444 Fan mounting screw locations LECOL_EMBEDDEDIMG_0000178445_x.png Figure 3. Fan mounting screw locations 4(4)

  • Page 131: Input Rectifier Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 132 0000178366 Mounting hardware locations LECOL_EMBEDDEDIMG_0000178367_x.png Figure 1. Mounting hardware locations 2(2)

  • Page 133: Inverter Control Board Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 134 0000178420 Inverter control board plug locations LECOL_EMBEDDEDIMG_0000178422_x.png Figure 1. Inverter control board plug locations 2(3)
  • Page 135 0000178420 Inverter control board mounting nut locations LECOL_EMBEDDEDIMG_0000178421_x.png Figure 2. Inverter control board mounting nut locations 3(3)

  • Page 136: Line Switch Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 137 0000178354 Using a 5/16” nutdriver, attach the two screws and washers securing the line switch to the front panel. Using a 3/8” nutdriver, attach the nut, lock washer and flat washer securing the ground lead to the ground stud on the front panel. See Wiring Diagram. Carefully attach the cable tie, securing the plastic protective sleeve to the line switch.
  • Page 138 0000178354 Line switch mounting screw locations LECOL_EMBEDDEDIMG_0000178356_x.png Figure 2. Line switch mounting screw locations Line switch lead locations LECOL_EMBEDDEDIMG_0000178355_x.png Figure 3. Line switch lead locations 3(3)

  • Page 139: Main Capacitor Board Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 140 0000178392 Perform the Case Cover Replacement Procedure. Perform the Retest After Repair Procedure. Main capacitor board terminal locations LECOL_EMBEDDEDIMG_0000178374_x.png Figure 1. Main capacitor board terminal locations 2(3)
  • Page 141 0000178392 Main capacitor board mounting nut locations LECOL_EMBEDDEDIMG_0000178393_x.png Figure 2. Main capacitor board mounting nut locations 3(3)

  • Page 142: Main Transformer Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 143 0000178431 13. Using a 5/16” nutdriver, remove the two screws securing the main transformer to the base of the machine. Figure F.6. See Wiring Diagram. 14. Carefully route the transformer leads to allow for the removal. See Wiring Diagram. 15. The main transformer can now be removed and replaced. REPLACEMENT PROCEDURE Procedure Steps: Carefully position the new main transformer into the machine.
  • Page 144 0000178431 Short transformer primary lead location LECOL_EMBEDDEDIMG_0000178417_x.png Figure 1. Short transformer primary lead location 3(7)
  • Page 145 0000178431 Switchboard terminal B3 location LECOL_EMBEDDEDIMG_0000178416_x.png Figure 2. Switchboard terminal B3 location 4(7)
  • Page 146 0000178431 Transformer leads X11, X12 and X21 locations LECOL_EMBEDDEDIMG_0000178415_x.png Figure 3. Transformer leads X11, X12 and X21 locations 5(7)
  • Page 147 0000178431 X13 lead locations LECOL_EMBEDDEDIMG_0000178414_x.png Figure 4. X13 lead locations Boost relay leads 110 and 110A locations LECOL_EMBEDDEDIMG_0000178433_x.png Figure 5. Boost relay leads 110 and 110A locations 6(7)
  • Page 148 0000178431 Main transformer mounting screw locations LECOL_EMBEDDEDIMG_0000178432_x.png Figure 6. Main transformer mounting screw locations 7(7)

  • Page 149: Mode Select Switch Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 150 0000178437 Perform the Case Cover Replacement Procedure. Perform the Retest After Repair Procedure. Mode select switch knob location LECOL_EMBEDDEDIMG_0000178440_x.png Figure 1. Mode select switch knob location 2(3)
  • Page 151 0000178437 User interface board plug J3 location LECOL_EMBEDDEDIMG_0000178439_x.png Figure 2. User interface board plug J3 location User interface board plug J3 lead locations LECOL_EMBEDDEDIMG_0000178438_x.png Figure 3. User interface board plug J3 lead locations 3(3)

  • Page 152: Output Rectifier Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 153 0000178491 13. Using a 7/16” nutdriver, remove the two screws and washers securing the bottom rectifier bracket to the heatsink. See Figure F.2. 14. The output rectifier assembly can now be removed and replaced. REPLACEMENT PROCEDURE Procedure Steps: Using a 7/16” nutdriver, attach the two screws and washers securing the bottom rectifier bracket to the heatsink.
  • Page 154 0000178491 Choke lead, positive boost lead, X11 and X12 lead locations LECOL_EMBEDDEDIMG_0000178493_x.png Figure 1. Choke lead, positive boost lead, X11 and X12 lead locations 3(4)
  • Page 155 0000178491 Cable holder and bottom rectifier bracket location LECOL_EMBEDDEDIMG_0000178492_x.png Figure 2. Cable holder and bottom rectifier bracket location 4(4)

  • Page 156: Pfc Boost Board Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 157 0000178385 14. Label and disconnect plug J44 from the PFC boost board. See Figure F.2. See Wiring Diagram. 15. Carefully remove the PFC board bracket from the machine. Carefully route cables through the bracket as necessary. 16. Using a 3/8” nutdriver, remove the four nuts securing the PFC boost board to the PFC board bracket. See Figure F.3.
  • Page 158 0000178385 PFC board bracket and heatsink holder locations LECOL_EMBEDDEDIMG_0000178388_x.png Figure 1. PFC board bracket and heatsink holder locations 3(5)
  • Page 159 0000178385 PFC boost board plug and terminal locations LECOL_EMBEDDEDIMG_0000178387_x.png Figure 2. PFC boost board plug and terminal locations 4(5)
  • Page 160 0000178385 PFC boost board mounting nut locations LECOL_EMBEDDEDIMG_0000178386_x.png Figure 3. PFC boost board mounting nut locations 5(5)

  • Page 161: Scr (Pre-Charge) Board Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 162 0000178368 Perform the Case Cover Replacement Procedure. Perform the Retest After Repair Procedure. Protective cover cable tie locations LECOL_EMBEDDEDIMG_0000178370_x.png Figure 1. Protective cover cable tie locations 2(3)
  • Page 163 0000178368 SCR (pre-charge) board plug J40 and input rectifier lead and plug locations LECOL_EMBEDDEDIMG_0000178369_x.png Figure 2. SCR (pre-charge) board plug J40 and input rectifier lead and plug locations 3(3)

  • Page 164: Switchboard Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 165 0000178399 Carefully position the new switchboard into the machine. Using a 3/8” nutdriver, attach the four nuts securing the switchboard to the mounting bracket. Connect plugs J42 and J43 to the switchboard. See Wiring Diagram. Using a torx nutdriver (size T-25), attach the screw and lock washer securing lead B2A to terminal B2 of the switchboard.
  • Page 166 0000178399 Switchboard terminal and plug locations LECOL_EMBEDDEDIMG_0000178401_x.png Figure 1. Switchboard terminal and plug locations 3(4)
  • Page 167 0000178399 Switchboard mounting nut locations LECOL_EMBEDDEDIMG_0000178400_x.png Figure 2. Switchboard mounting nut locations 4(4)

  • Page 168: Thermostat #1 Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 169 0000178474 Thermostat #1 lead locations LECOL_EMBEDDEDIMG_0000178476_x.png Figure 1. Thermostat #1 lead locations 2(3)
  • Page 170 0000178474 Thermostat #1 mounting screw locations LECOL_EMBEDDEDIMG_0000178475_x.png Figure 2. Thermostat #1 mounting screw locations 3(3)

  • Page 171: User Interface Board Removal And Replacement Procedure

    WARNING: Type of Hazard: 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 172 0000178410 User interface board plug locations LECOL_EMBEDDEDIMG_0000178412_x.png Figure 1. User interface board plug locations User interface board mounting screw locations LECOL_EMBEDDEDIMG_0000178411_x.png Figure 2. User interface board mounting screw locations 2(2)

This manual is also suitable for:

1282212946

Table of Contents