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FUNCTION PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
TROUBLESHOOTING AND REPAIR
F-7 F-7
POWER WAVE 355M/405M
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The machine often “noodle welds”
with a particular procedure. The
output is limited to approximately
100 amps.
1. The machine may be trying to
deliver too much power. When
the average output current
exceeds a maximum limit, 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 machine.
1. Perform the Current
Transducer Test.
2. The control board may be faulty.
Excessively long and erratic arc. 1. Check for proper configuration
and implementation of voltage
sensing circuits.
1. Check the connections between
the voltage sense receptacle
and the control board. See the
Wiring Diagram.
2. The control board may be faulty.