Lincoln Electric INVERTEC V350-PRO Service Manual page 55

F-5
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The V350-Pro does not have weld-
ing output. The displays are lit.
The V350-Pro will not produce full
output.
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).
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Make sure the reconnect switch
is configured correctly for the
input voltage applied.
2. Make sure the Weld Terminals
Select is ON. If the problem is
solved the remote control
device or associated circuitry
may be faulty. See the wiring
diagram.
3. Put the Control Select in the
Local position. If the problem is
solved the remote control
device or associated circuitry
may be faulty.
4. If an error code is displayed see
Fault Code Explanations.
1. The input voltage may be too
low, limiting the output capabili-
ty of the machine. Make cer-
tain the input voltage is correct
for the machine and the recon-
nect switch and jumper lead
configuration.
2. The welding current may be too
high . The machine will fold
back to 100 amps if the weld-
ing current exceeds 450 amps.
3. Make sure the machine is in
"Local" output control.. If the
problem is resolved the Remote
control board or the external
remote control unit may be
faulty.
CAUTION
V350-PRO
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Check the reconnect switch and
associated leads for loose or
faulty connections. See the
wiring diagram.
2. Perform the Main Switch
Board Test.
3. Perform the Power Board
Test.
4. Perform the Output Diode
Module Test.
5. The control board may be faulty.
6. The input filter capacitors may
be faulty. Check and replace if
necessary.
7. The remote board may be
faulty.
1. Perform the Output Rectifier
Test.
2. Perform the Main Switch
Board Test.
3. Perform the Power Board
Test.
4. Perform the Current
Transducer Test.
5. If the preset function is not
performing properly the status
panel board or the output
control may be faulty.
6. The control board may be
faulty.
F-5