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Thermal Arc POWERMASTER 350P - User Manual

Thermal Arc POWERMASTER 350P
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POWERMASTER
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MODE SELECT
CONTACTOR
REMOTE ON
P O W E R M A S T E R
P O W E R M A S T E R
POWER
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Art # A-07556
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CC/CV POWER SOURCE
500
500P
350
350P
Service
Manual
Version No: AB.01 Issue Date: March 17, 2006 Manual No.: 0-4938B
Operating Features:

Table of Contents

Questions and Answers

  • J
    Justin AndersonAug 8, 2025
    What to do if Thermal Arc POWERMASTER 350P is completely inoperative?
    • L
      Lauren MillerAug 9, 2025
      If your Thermal Arc Welding System is completely inoperative, with the digital display and fans off, and no output, here are some things to check: * Start by checking for blown input fuse or fuses. * Make sure the voltage setting on the changeover board is correct. * Check the wiring to the input terminal block and ground screw. * Ensure the front panel CONTROL POWER switch/circuit breaker is ON. * With the CONTROL POWER switch ON and power applied, check for 120 VAC power on the rear duplex. * Inspect all connections to the control boards. * Examine the wiring to the small control transformer mounted underneath the control board. Also, the circuit breaker switch or the main or display control board on the front panel might be defective.
  • M
    Marissa NortonAug 12, 2025
    What to do if Thermal Arc POWERMASTER 350P Welding System blows input fuse as soon as power is applied?
    • M
      Martha PonceAug 12, 2025
      If your Thermal Arc Welding System blows the input fuse immediately upon applying power, consider the following checks: * Verify the wiring to the input terminal block and ground screw. * Ensure the voltage setting on the changeover board is correct. * Inspect the internal wiring to the terminal block, input rectifier, IGBTs, contactors, and changeover board. Also, the input rectifier module, suppressors, IGBT modules, or capacitor boards might be defective.
  • M
    Maria CarterAug 16, 2025
    What to do if Thermal Arc POWERMASTER 350P Welding System powers up but fans do not run?
    • R
      Richard BlairAug 16, 2025
      If the Thermal Arc Welding System powers up but the fans aren't running, remember that the fans should normally run when the machine is first powered up or whenever the OUTPUT CONTACTOR is ON. Check the following: * Check the wiring to all three fans. * Check the wiring to the main control board – J9. Also, the main control board or the fans themselves might be defective.
  • T
    tmannAug 21, 2025
    Why does CONTROL POWER circuit breaker trip off on Thermal Arc POWERMASTER 350P?
    • M
      Morgan SheaAug 21, 2025
      If the CONTROL POWER circuit breaker trips off on your Thermal Arc Welding System, investigate these potential issues: * Check for shorts or overload on either rear duplex, 14 pin receptacle or 19 pin receptacle and cables. * Check for an internal short circuit and inspect the wiring to both contactors, all three fans, and to the main control board – J9. * Check the internal wiring to the rear duplex, amphenol board, and small control transformer. Also, the front panel circuit breaker, the small control transformer or the aux. transformer might be defective.
  • V
    Victor LawsonAug 26, 2025
    What to do if Thermal Arc POWERMASTER 350P Welding System powers up but has no output or incorrect output (Power-Master 500 and 350 only)?
    • A
      Alexander EscobarAug 26, 2025
      If your Thermal Arc Welding System (Power-Master 500 and 350 only) powers up but has no output or an incorrect output, you can check the following: * Check for open circuit voltage. * Check for shorted output diode. * Check front panel controls. * Check internal wiring to control board and current sensor. Also, the main control board, IGBT or input rectifier module, or the current sensor might be defective.
  • M
    Monica HuffAug 29, 2025
    What to do if Thermal Arc POWERMASTER 350P powers up but has no output or incorrect output (Power-Master 500P and 350P only)?
    • S
      Sarah DavidsonAug 30, 2025
      If your Thermal Arc Welding System (Power-Master 500P and 350P only) powers up but shows no output or an incorrect output, consider these checks: * Check for open circuit voltage. * Check for shorted output diode. * Check front panel controls. * Check internal wiring to control board and current sensor. Also, the main control board, IGBT or input rectifier module, or the current sensor might be defective.
  • A
    Amy PierceSep 3, 2025
    How to fix erratic arc on Thermal Arc POWERMASTER 350P Welding System?
    • H
      Heather BishopSep 3, 2025
      To address an erratic arc on your Thermal Arc Welding System, consider the following: * Check for loose or incorrect polarity connection to electrode and work. * Ensure good gas flow and correct mixture. * Check if wire feeding smoothly, including feed rolls, liner, tip, and nozzle. * Check welding wire for excess lubrication or improper cast. * Check voltage and wire speed settings. Also, the electronic inductance and torch to work distance should be checked. The main control board might be defective.

Thermal Arc POWERMASTER 350P Specifications

General IconGeneral
BrandThermal Arc
ModelPOWERMASTER 350P
CategoryWelding System
LanguageEnglish

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