Troubleshooting - Lincoln Electric POWER-ARC 4000 Operator's Manual

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PROBLEMS
(SYMPTOMS)
No generator power or welding output.
Generator power is available but unit
will not weld.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

TROUBLESHOOTING

Observe all Safety Guidelines detailed throughout this manual
POSSIBLE AREAS OF
MISADJUSTMENT(S)
PROBLEMS
1. Disconnect anything plugged into
auxiliary receptacles and weld loads.
2. Open lead in flashing or field circuit.
3. Open flashing diode (D1)
4. Faulty brushes.
5. Faulty rheostat (R1).
6. Faulty field rectifier (D1).
7. Faulty capacitor (C1).
8. Faulty stator field winding.
9. Faulty rotor.
10. Dirty slip rings, clean slip rings when
not in use.
1. Loose connection to output stud.
2. Work not connected.
3. Electrode holder loose.
4. No open circuit voltage at output
studs. Open lead in weld circuit.
5. Faulty reactor (L1).
6. Rheostat (R1) lead broke
POWER-ARC 4000
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
CAUTION
RECOMMENDED
COURSE OF ACTION
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