Troubleshooting & repair, Caution – Lincoln Electric COMMANDER SVM153-A User Manual
Page 65
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,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
WELDING PROBLEMS
The welding arc is "cold." The
engine runs normally. The auxiliary
power is normal.
1. Check for loose or faulty con-
nections at the weld output ter-
minals and welding cable con-
nections.
2. The welding cables may be too
long or coiled, causing an
excessive voltage drop.
3. Make sure the electrode (wire,
gas, voltage, current etc.) is cor-
rect for the process being used.
1. Check for the correct OCV at
the welding output terminals. If
the correct voltage is present at
the output terminals, check for
loose connection on the heavy
current carrying leads inside the
Commander 500. See the
Wiring Diagram.
2. If the OCV is low at the welder
output terminals, perform the
Engine Throttle Adjustment
Test.
3. Perform the Output Rectifier
4. Perform the Stator Voltage
5. Perform the Power Module
6. The Weld Control PC board
may be faulty.
F-12
F-12
TROUBLESHOOTING & REPAIR
COMMANDER 500