Lincoln Electric 10120 Operator's Manual page 27

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PROBLEMS
(SYMPTOMS)
Variable or sluggish welding arc.
Machine will not shut off.
Output Control Pot not functioning in
"Local" control.
No output control in "Remote" con-
trol.
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 througout this manual
PPOSSIBLE
PROBLEMS
1. Make sure the welding cables are
sized correctly and the connec-
tions are tight.
2. Make sure the welding proce-
dures are correct.
1. The input power switch (SW1)
may be faulty.
2. The input contactor (CR1) may
be faulty.
1. Check the Local/Remote control
switch and associated leads.
See wiring diagram.
2. The machine output control
potentiometer may be faulty.
Also check associated leads.
See wiring diagram.
1. Output Control Switch in wrong
position.
2. Faulty Output Control Switch.
3. Faulty Remote Control Pot.
4. Leads or connections open in con-
trol circuit. (#75, #76, #77)
CAUSE
If all recommended possible areas of
misadjustments have been checked
and the problem persists, contact
your local Lincoln Authorized
Field Service Facility.
CAUTION
CV-655
RECOMMENDED
COURSE OF ACTION
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