Lincoln Electric IDEALARC SVM 122-A User Manual
Idealarc dc-400, Svm 122-a, Service manual
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Table of contents
Document Outline
- Master TOC
- Safety
- Section A Installation
- Section B Operation
- Section C Accessories
- Section D Maintenance
- Section E Theory of Operation
- Section F Troubleshooting & Repair
- Symptoms
- Major physical or electrical damage is evident when the sheet metal cover(s) are removed.
- Machine is dead – no output – no fan – no pilot light.
- The machine is dead – no output – no fan – the pilot light is lit.
- The input contactor operates – the fan runs – the pilot light is lit – but the machine has no welding output.
- The machine has high welding output and no control.
- The machine has minimum welding output and no control.
- The machine does not have maximum output.
- The machine will not shut off when the power switch is put in the OFF position.
- The Arc Control switch (S5) has no effect in CV (FCAW/GMAW) mode when welding with the short circuit transfer process.
- The output terminals are always electrically “hot.”
- Poor arc striking when using semi-automatic or automatic wire feeders.
- Poor arc characteristics when welding in the constant voltage (CV) mode.
- The Arc Force control (R5) has no effect on the arc.
- The welding arc is variable and sluggish.
- Section G Electrical Diagrams