Lincoln Electric R3R-500 User Manuals

Table of Contents

• Master TOC

  6
• Safety

  2
• Section A Installation

  7
• Section B Operation

  17
• Section C Accessories

  23
• Section D Maintenance

  25
• Section E Theory of Operation

  29
• Section F Troubleshooting & Repair

  35
• Symptoms

  38
  • Major physical or electrical dam-age is evident when the sheet metal cover(s) are removed.

    38
  • Machine is dead – no output – no fan – no pilot light.

    38
  • The machine is dead - not output -no fan - the pilot light is on. The amber temperature light is NOT on.

    38
  • The machine is dead – no output – no fan. The input contactor does not operate. The amber thermal...

    39
  • The input contactor (CR1) chatters.

    39
  • The machine has high welding output and no control.

    39
  • The machine has minimum (or very low) welding output and no control.

    40
  • The input contactor operates - the fan runs - the pilot light is on - but the machine has no welding output.

    40
  • The machine does not have maximum output.

    41
  • The machine will not shut off when the power switch is put in the OFF position.

    41
  • The output terminals are always electrically “hot.”

    42
  • The machine welds but reduces to a low output under load and remains there until the load is...

    42
  • The machine shuts off even when not under load or makes excessive noise like it is loaded.

    42
  • Poor arc characteristics.

    43
  • The welding arc is variable and sluggish.

    43
• Section G - Electrical Diagrams

  99