Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 68

F-8
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Machine has no output – no fans
– no display. Main input fuses are
open indicating excessive input
current draw.
Machine has no output – no dis-
play – fans run.
Machine has no output – fans run
- Display flashes On and Off
repeatedly.
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)
OUTPUT PROBLEMS
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. Check circuit breaker (5 amp)
located on the front panel.
Reset if necessary.
1. Check for loose or faulty con-
nections at the Power P.C.
Board. See Wiring Diagram.
CAUTION
POWER WAVE 450
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
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.
1. Perform the Auxiliary
Transformer Test #1.
2. Perform the Internal and
Auxiliary Supply Voltage Test.
1. Replace the Power P.C. Board.
F-8