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E-5
TROUBLESHOOTING
E-5
POWER WAVE 455
Observe all Safety Guidelines detailed throughout this manual
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 tests/repairs safely, con-
tact your local authorized Lincoln Electric Field Service Facility for technical assistance.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Machine often “noodle welds” (out-
put is limited to approximately 100
amps) when running a particular
procedure
Machine won’t produce full output.
For no apparent reason, the weld-
ing characteristics have changed.
Auxiliary receptacle is “dead” — no
auxiliary voltage .
Secondary current limit has been
exceeded, and the machine has
phased back to protect itself.
Adjust procedure or reduce load to
lower current draw from the
machine.
1. Input voltage may be too low,
limiting output capability of the
power source. Make certain
that the input voltage is prop-
er, according to the Rating
Plate located on the rear of
the machine.
2. Input may be “single phased”.
Make certain the input voltage
is proper on all three input
lines.
1. Check for proper Wire Feed
Speed setting. In CV MIG
and FCAW modes, check for
proper Voltage setting. In the
MIG/MAG pulse modes,
check the Trim setting. These
controls are on the wire feed-
er.
2. Check for proper shielding
gas mix and flow.
3. Check for loose or faulty weld
cables and cable connections.
1. Circuit breaker CB2 (on case
front) may have opened.
Reset.
2. Circuit breaker CB4 (in recon-
nect area) may have opened.
Reset.
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.