The power wave 455r will not produce full output, Troubleshooting & repair, Caution – Lincoln Electric POWER WAVE SVM173-A User Manual
Page 53
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
FUNCTION PROBLEMS
The machine often "noodle welds"
when running a particular process.
The output is limited to approxi-
mately 100 amps.
1. The machine may be trying to
deliver too much power. When
the average output current
exceeds 570 amps, the
machine will "phase back" to
protect itself. Adjust the proce-
dure or reduce the load to lower
the current draw from the Power
Wave 455R machine.
1. Perform
the
2. The Control Board may be
faulty.
The machine often "noodle welds"
when running an STT process.
STT work/ Electrode sense lead
routing
1. Refer to sense lead route rec-
ommendations section
2. Perform
the
The Power Wave 455R will not pro-
duce full output.
1. The input voltage may be too
low, limiting the output capability
of the machine. Make certain
the input voltage is correct for
the machine and the reconnect
panel configuration.
2. Make sure all three phases of
input power are being applied to
the machine.
3. If using the STT output terminal,
be aware that the STT output is
limited to 325 amps.
1. Perform the Output Rectifier
2. Perform the Current Trans-
3. Perform the Power Board Test.
4. The Control Board may be
faulty.
5. If using the STT output terminal,
the STT Chopper Board may be
faulty. See the Wiring Diagram.
F-7
F-7
TROUBLESHOOTING & REPAIR
POWER WAVE 455M/MSTT