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TROUBLESHOOTING & REPAIR
F-6 F-6
POWER WAVE 450
TROUBLESHOOTING GUIDE Observe Safety Guidelines
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-
800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Machine has no output – fans are
running – display is on – a “click-
ing” sound is heard coming from
the machine.
1. Turn power OFF immediately.
2. Check for proper input voltage
(per machine nameplate).
3. Make certain the reconnect
panel is configured properly for
the applied voltage.
1. Perform the Auxiliary
Transformer Test #1
2. Perform the Main Contactor
Test.
3. Perform the Reconnect
Switch Test #1.
4. Perform the Reconnect
Switch Test #2.
5. Perform the Input Rectifier
Test.
6. Perform the Switch Board
Test.
7. Perform the Snubber and
Bleeder Resistor Test.
8. The protection board may be
faulty. Replace.
9. The input filter capacitors may
be faulty. Replace.