Lincoln Electric POWER WAVE SVM173-A Service Manual page 54

F-8
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The Auxiliary Receptacle is "dead."
The 120VAC is not present at the
receptacle.
The Power Wave 455M is "trig-
gered" for output but there is no
welding output.
When in the STT
the spatter is higher than normal
and the arc is inconsistent.
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.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Check the 3.5 amp circuit
breaker (CB3) located in the
reconnect area. Reset if neces-
sary.
1. Make sure that the triggering
method and device is correct
and operating properly.
mode, 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.
CAUTION
POWER WAVE 455M/MSTT
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Check the receptacle and asso-
ciated wiring for loose or faulty
connections. See the Wiring
Diagram.
2. Perform the T2 Auxiliary
Transformer Test.
Use troubleshooting software to
find the problem.
Refer to L.E. setup utility user man-
ual section.
1. Perform the STT Chopper
Board Test.
2. Perform the
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
Current