Lincoln Electric INVERTEC V155-S Service Manual page 38

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The machine has high welding
output and no control
RED LED stays ON continuously 1. Shunt Cable damaged.
Flashing YELLOW LED
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.
THEORY OF OPERATION
All manuals and user guides at all-guides.com
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Potentiometer failure.
2. Control Board failure.
2. Control Board defective.
1. Input Supply Voltage out of
tolerance.
CAUTION
INVERTEC® V155-S
RECOMMENDED
COURSE OF ACTION
1. Replace Potentiometer.
2. Replace Control Board.
1. Check connection of white,
red and black leads on the
Inverter Board
2. Replace Shunt Cable
Assembly.
3. Replace Conrol Board.
1. Supply correct Input Voltage.
2. Check Control Board
conections.
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