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TROUBLESHOOTING AND REPAIR | |||
Troubleshooting Guide – See Wiring Diagrams for location of specified | Observe Safety Guidelines | ||
components. See Wiring Diagrams for troubleshooting of specific circuits. | detailed in the beginning of this manual. | ||
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PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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FUNCTIONAL PROBLEMS (Continued)
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When the gun trigger is pulled the wire feeds, the gas flows, but there is NO arc voltage. (The wire does not arc on the work piece.)
1.Check the welding cable for loose or faulty connections.
2.Check or replace the gun.
3.If a burnback or timer kit is used, unplug J104 from the control PC board and install the jumper plug. See wiring diagram. If the problem is solved then the timer or burnback kit may be defective.
4.Check to see if OCV (open circuit voltage) is present at the power source welding output terminals. If the OCV IS present at the power source output terminals then the problem is external to the power source. (The problem is in the welding cables, wire feeder, or gun.)
5.If the OCV is NOT present at the power source output terminal then contact your Local Lincoln Authorized Field Service Facility.
1.Jumper the trigger leads at the power source. (Either #2 to #4 if on a terminal strip, or “C” to “D” if on a 14 pin amphenol type connector.) If the power source produces the correct open circuit voltage then the power source is functioning correctly. (The problem is with the control cable, the wire feeder, the welding cables, or the gun.) If the power source does not produce OCV, then the power source is faulty.
2.The F101 fuse in the wire feeder may be faulty. Test or replace.
3.Perform the Control Cable Continuity Test.
4.Perform the Control Relay Test.
5.Check the continuity of leads #2 and #4 from the control cable receptacle to the control board plug J101. See wiring diagram.
6.The control PC board may be faulty. Replace per Control PC Board Replacement procedure.
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call
