Lincoln Electric INVERTEC STT Series Service Manual page 50

F-9
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Porosity in the weld.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
WELDING PROBLEMS
1. Make sure the gas type and
flow rate is correct for the pro-
cedure being used. Shield the
work from excessive outside air
currents.
2. Check the gun and nozzle for
leaks or obstructions.
3. Make certain the machine and
wire feed settings are correct for
the process.
CAUTION
INVERTEC STT
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Contact the Lincoln Electric
Service Department.
383-2581 or 1-800-833-WELD
(9353).
F-9
1-216-