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TROUBLESHOOTING & REPAIR
F-8 F-8
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 – no fans
– no display. Main input fuses are
open indicating excessive input
current draw.
1. Check for proper input voltage
connections.
2. Make certain the reconnect
panel is configured properly for
the applied voltage.
3. Replace the input fuses with
proper size and ratings.
1. Perform the Input Power and
Wiring Harness Test.
2. Perform the Input Rectifier
Test.
3. Perform the Reconnect
Switch Test #1.
4. Perform the Switch Board
Test.
5. Perform the Snubber and
Bleeder Resistor Test.
Machine has no output – no dis-
play – fans run.
1. Check circuit breaker (5 amp)
located on the front panel.
Reset if necessary.
1. Perform the Auxiliary
Transformer Test #1.
2. Perform the Internal and
Auxiliary Supply Voltage Test.
Machine has no output – fans run
- Display flashes On and Off
repeatedly.
1. Check for loose or faulty con-
nections at the Power P.C.
Board. See Wiring Diagram.
1. Replace the Power P.C. Board.
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