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V350-PRO
TROUBLESHOOTING & REPAIR
F-7 F-7
Observe Safety Guidelines
TROUBLESHOOTING GUIDE
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 test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-800-833-9353(WELD).
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
The machine’s welding output is
very high and uncontrollable.
1. Put the Control Select in the
Local position. If the problem
is solved the remote control
device or associated circuitry
may be faulty.
1. Perform the Current
Transducer Test.
2. If the output is normal when
the Control Select is in the
Local position but the output is
very high in the Remote
position the remote board may
be faulty. Perform The SPI
Cable Resistance and Voltage
Test.
3. The control board may be
faulty.
The Weld Mode Select does not
function properly.
1. Refer to Operation Section of
this manual for normal
operation characteristics.
1. Check for loose or faulty plug
connections between the
control board and the mode
select panel. See the wiring
diagram.
2. Perform the SPI Cable
Resistance and Voltage Test.
3. The Mode Select Panel board
may be faulty.
4. The control board may be
faulty.
The Status Panel (Control and
Weld Terminals Select) does not
function properly.
1. Refer to Operation Section of
this manual for normal
operation characteristics.
1. Check for loose or faulty plug
connections between the
control board and the status
board. See the wiring diagram.
2. The Status Board may be faulty.
3. The control board may be faulty.