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V350-PRO
TROUBLESHOOTING & REPAIR
F-8 F-8
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 display is not functioning
properly.
1. Refer to the Operation Section
of this manual for normal
operation characteristics.
1. Check for loose or faulty plug
connections between the
Display board and the control
board. See the wiring diagram.
2. The display board may be faulty.
3. The control board may be faulty.
A fault or error code is displayed. 1. See the Fault Code
Explanations.
1. See Fault Code Explanations.
For no apparent reason the weld-
ing characteristics have change.
1. Check the welding cables for
loose or faulty connection.
2. Make sure the machine’s mode
and output are set correctly for
the process being used. (CV,
CC,TIG etc.)
3. If Mig welding make sure the
shielding gas and wire speed
are correct for the process
being used.
1. Perform the Voltage and
Current Calibration
Procedure.
2. Perform the Current
Transducer Test.
3. Perform the Output Diode
Module Test
4. The control board may be faulty.