Troubleshooting Guide - Impax IM-MMA140 Instruction Manual

TROUBLESHOOTING

Troubleshooting Guide

Problem
No weld current
(plug fuse blowing).
No weld current
Unstable arc.
Weld current interrupted. Thermal trip has operated.
Porous weld.
Irregular weld cap.
Poor penetration.
Excessive penetration.
Possible Cause
Blown rectifier.
Poor earth clamp connection.
Break in torch lead.
Replace earth lead.
Incorrect settings.
Impurities in the weld area.
Rusty or dirty joints.
Torch incorrectly held.
Weld current too low.
Arc too long
Weld current too high.
Torch is too far from the workpiece. Weld with the electrode at the correct
Remedy
Replace rectifier.
Break in earth lead.
Check and clean up connections.
Replace torch or lead.
Check settings.
Clean the weld area prior to welding.
Allow the welder to cool down.
Clean the weld area prior to welding.
Weld with the electrode at the correct
distance and angle to the workpiece.
Adjust settings.
Move the electrode closer to the
workpiece.
Adjust settings.
distance from the workpiece.
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