Lincoln Electric V350-PRO User Manual download pdf (Page 43)

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V350-PRO
TROUBLESHOOTING & REPAIR
F-5 F-5
TROUBLESHOOTING GUIDE Observe Safety Guidelines
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
OUTPUT PROBLEMS
The V350-Pro does not have weld-
ing output.   The displays are lit.
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. 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 status panel board may be 
faulty.
The V350-Pro will not produce full
output.
1. The input voltage may be too   
low, limiting the output 
capability of  the machine.  
Make certain the input voltage 
is correct for  the  machine and 
the reconnect switch and 
jumper lead configuration.
2. The welding current may be too 
high .  The machine will fold-
back to 100 amps if  the 
welding 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.
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.

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Lincoln Electric V350-PRO User Manual Page 43

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