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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
1-888-935-3877.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
The machine is dead—no lights—
no output—the machine appears to
be off.
1. Make certain the input power
switch SW1 is in the ON posi-
tion.
2. Check the main input fuses (or
breakers). If open, replace or
reset.
3. Check the 6 amp CB4 breaker
located in the reconnect area.
Reset if tripped.
4. Make certain the reconnect
panel is configured correctly for
the applied input voltage.
1. Check the input power switch
SW1 for proper operation. Also
check the associated leads for
loose or faulty connections.
See the Wiring Diagram.
2. Check circuit breaker CB4 for
proper operation.
3. Perform the DC Bus Board
Test.
4. The power board rectifier may
be faulty. Check rectifier and
associated wiring. See the
Wiring Diagram
5. Perform the Power Board Test.
6. Perform the T1 Auxiliary
Transformer Test.
7. The Control Board may be
faulty.
F-5 F-5
TROUBLESHOOTING & REPAIR
POWER WAVE 455M/MSTT
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