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Observe Safety Guidelines TROUBLESHOOTING GUIDE
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
FUNCTION PROBLEMS
The Auxiliary Receptacle is "dead."
The 120VAC is not present at the
receptacle.
1. Check the 3.5 amp circuit
breaker (CB3) located in the
reconnect area. Reset if neces-
sary.
1. Check the receptacle and asso-
ciated wiring for loose or faulty
connections. See the Wiring
Diagram.
2. Perform the T2 Auxiliary
Transformer Test.
The Power Wave 455M is "trig-
gered" for output but there is no
welding output.
1. Make sure that the triggering
method and device is correct
and operating properly.
Use troubleshooting software to
find the problem.
Refer to L.E. setup utility user man-
ual section.
When in the STT mode,
the spatter is higher than normal
and the arc is inconsistent.
1. Make certain the work sense
lead (21) is connected properly.
2. Make certain the electrode
cable is connected only to the
STT output terminal and NOT
the Power Wave positive output
terminal, or both.
3. Make sure the welding parame-
ters are correct for the process.
1. Perform the STT Chopper
Board Test.
2. Perform the Current
Transducer (STT) Test.
3. Check calibration using L.E.
dianolostic software, and con-
firm correct wire feed speed to
display
4. The Control Board may be
faulty.
F-8 F-8
TROUBLESHOOTING & REPAIR
POWER WAVE 455M/MSTT
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