Master TOC
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 (SYMPTOMS)
Wire feeder circuit breaker tripping when the gun trigger is pulled.
POSSIBLE AREAS OF | RECOMMENDED |
MISADJUSTMENT(S) | COURSE OF ACTION |
FUNCTIONAL PROBLEMS (Continued)
Check for jammed wire or | 1. Check the current draw for the | |||
“birdsnest” inside wire drive | wire feed motor. Insert a | DC | ||
compartment. | ammeter in series with | lead | ||
| #539 or #541 and the control | |||
| PC board. |
|
| |
| 2. If current draw IS excessive, | |||
| greater than 2 Amps, check for | |||
| rough | turning | gearbox | by |
| turning by hand. If gearbox | |||
| turns roughly or grinds, replace | |||
| per Wire Drive Assembly and | |||
| Component | Replacement | ||
| procedure. |
|
| |
| 3. If the gearbox is OK and the | |||
| motor | current | draw | IS |
| excessive, then the motor or | |||
| motor | brushes | may | be |
| defective. Check or replace. | |||
4. If motor current draw is NOT excessive, disconnect gas solenoid leads from control PC board terminals #7 and #32A. If circuit breaker no longer trips, solenoid may be defective. Replace solenoid per Gas Solenoid and Connections Replacement Procedure.
5. The Control PC Board may be faulty. Replace the Control PC Board.
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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
