Lincoln Electric INVERTEC IM958 - Manual (Page 32)

E-3 TROUBLESHOOTING E-3
V310-T AC/DC TIG
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Oxidation
Tungsten inclusions
Porosity
Hot cracking
1. lnsufficient gas.
2. No protection on the back side.
1. lncorrect electrode sharpening.
2. Electrode too small.
3. Operating failure (contact of the
tip with the workpiece).
1. Dirt on the edges.
2. Dirt on the filler material.
3. Excessive travel speed.
4. Current intensity too low.
5. Insuffient gas flow rate
1 Unsuitable filler material.
2. High heat supply.
3. Dirty materials.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.
PROBLEMS IN TIG WELDING