ESAB EPP-400 Manuel D'instructions page 298

section 6
6.4 testing and replacing components
notice
power semiconductor components
Three categories of power semiconductors include;
• Power Rectifiers
• Freewheeling Diodes
• IGBTs
• Replace a PC board only until a problem was isolated to that board.
• Always disconnect power before removing or installing a PC board.
• Do not grasp or pull on board components.
• Always place a removed board on a static free surface.
• If a PC board is found to be a problem, check with your ESAB distribu-
tor for a replacement. Provide the distributor with the part number of
the board as well as the serial number of the power source.
• Do not attempt to repair the board yourself. Warranty will be voided if
repaired by the customer or an unauthorized repair shop.
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