Lincoln Electric IDEALARC CV-300 Service Manual page 43

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TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
The machine has low output and no
control. The fan runs and the dis-
play is lit.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call
216-383-2531 or 1-888-935-3877
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
OUTPUT PROBLEMS
1. Place the remote switch in
machine control. If normal out-
put is restored then the remote
control unit may be faulty.
Check or replace.
2. If an error message is displayed
Explanation
see
Messages.
3. Make sure the three phase input
voltage matches the reconnect
panel configuration and that all
three phases are applied to the
machine.
CAUTION
IDEALARC CV-300
RECOMMENDED
COURSE OF ACTION
1. If the machine has normal out-
put in machine control, but not
in remote control, check the
remote switch (S4). Check the
wiring to the control board and
to the 14 pin amphenol.
of Error 2. If the machine has low output in
machine control check the out-
put control (R2) and associated
leads.
3. Check the feedback leads from
the shunt and the output termi-
nals to the control board. See
wiring diagram.
4. Perform the Main Transformer
Test.
5. Perform the Output Rectifier
Bridge Test.
6. Check the latching resistor (R1)
and the associated leads. See
wiring diagram.
7. Check for loose or faulty con-
nections at the output terminals
and the heavy current carrying
leads.
8. The control board may be
faulty. Replace.
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