E-6
TROUBLESHOOTING
E-6
POWER WAVE 455/STT
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, especially a procedure
with high WFS.
Machine won’t produce full output.
Auxiliary receptacle is “dead” no
auxiliary voltage .
1. Secondary current limit has been
exceeded, and the machine has
phased back to protect itself.
2. Adjust procedure or reduce load
to lower current draw from the
machine.
3. A single phase input (loss of L2)
or applications running from the
STT stud will reduce the sec-
ondary current limit from 570
Amps to 325 Amps.
1. Input voltage may be too low,
limiting output capability of the
power source. Make certain that
the input voltage is proper,
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.
3. STT machines only: May be
exceeding the 325 amp limit on
the STT output terminal.
4. Secondary current or voltage not
be properly calibrated. Check
values displayed on the Power
Feed 10/11 verses readings on
an external meter.
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.