Lincoln Electric IDEALARC SVM 122-A User Manual
Idealarc dc-400, Svm 122-a, Service manual
SVM 122-A
Oct. 1996
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
increased by proper installation
. . . and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before
you act and be careful.
SERVICE MANUAL
LINCOLN
®
ELECTRIC
World’s Leader in Welding and Cutting Products Premier Manufacturer of Industrial Motors
Sales and Service through subsidiaries and Distributors Worldwide
22801 St. Clair Ave. Cleveland, Ohio 44117-1199 U.S.A. Tel. (216) 481-8100
For use with machine code numbers 9847, 9848 and 9850
IDEALARC DC-400
TM
RETURN TO MAIN INDEX
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