Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 79

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TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Machine loses output while weld-
ing. Fans and display are func-
tioning properly.
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-
800-833-9353.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
WELDING PROBLEMS
1. Check the yellow High
Temperature light on the front-
panel. If the light is "ON," then
refer to the Output Problems
section in this table relating to
this condition.
2. Check for proper input volt-
ages (per machine nameplate).
3. Check for balanced three-
phase input supply voltages.
4. Check electrode and work
cables for loose or poor con-
nections.
CAUTION
POWER WAVE 450
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Perform the Welding
Feedback Test.
2. Perform the Switch Board
Test.
3. Perform the Snubber and
Bleeder Resistor Test.
4. Perform the Static Capacitor
Balance Test.
5. Perform the Dynamic
Capacitor Test.
6. Perform the appropriate Wire
Feeder Trigger Circuit Test.
If a K941-1 Remote Control Kit
is used, perform the K941-1
Remote Control Kit Trigger
Circuit Test.
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