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TROUBLESHOOTING & REPAIR
F-9 F-9
INVERTEC STT
Observe Safety Guidelines
TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
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
1-888-935-3877
.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
WELDING PROBLEMS
Porosity in the weld. 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.
1. Contact the Lincoln Electric
Service Department.
1-888-935-
3877
.