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E-4
TROUBLESHOOTING
E-4
DC-655
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Variable or sluggish welding arc.
Output Control Pot not functioning in
“Local” control only.
No output control in “Remote” control
only.
1. Make sure the mode switch is in
the proper position for the
process.
2. Make sure the welding cables are
sized correctly and the connec-
tions are tight.
3. Make sure the welding proce-
dures are correct.
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)
Contact your Local Lincoln Authorized
Field Service Facility for technical
troubleshooting assistance.