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OUTPUT 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
The machine has high welding
output and no control
1. Potentiometer failure.
2. Control Board failure.
1. Replace Potentiometer.
2. Replace Control Board.
RED LED stays ON continuously
1. Shunt Cable damaged.
2. Control Board defective.
1. Check connection of white,
red and black leads on the
Inverter Board
2. Replace Shunt Cable
Assembly.
3. Replace Conrol Board.
Flashing YELLOW LED
1. Input Supply Voltage out of
tolerance.
1. Supply correct Input Voltage.
2. Check Control Board
conections.
THEORY OF OPERATION
F-6 F-6
INVERTEC® V155-S
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