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| TROUBLESHOOTING AND REPAIR | ||||||
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| Observe all Safety Guidelines detailed throughout this manual |
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PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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| FUNCTION PROBLEMS (Continued) |
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The wire feeds when the gun trig- | 1. | Check the welding cables for | 1. | The 1CR relay, located on the |
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ger is activated but there is no arc |
| loose or faulty connections. |
| power board, may be faulty. |
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voltage. |
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| Check or replace. Note: The |
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| 2. | Put a jumper wire from #2 to #4 |
| relay may operate but the indi- |
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| on the power source terminal |
| vidual contacts may not be func- | |
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| strip. (machines with 14 pin |
| tioning properly. |
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| amphenols pin C to pin D). If the |
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| arc voltage is not present at the | 2. | If a burnback kit is installed, |
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| output terminals, the power |
| remove and install the jumper |
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| source is faulty. If the arc volt- |
| plug. If the problem is solved, |
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| age IS present, the problem is in |
| the burnback kit is faulty. |
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| the wire feeder or control cable. |
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| 3. | Check the #2 and #4 leads in the | |
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| 3. | Check the continuity of leads #2 |
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| and #4 through the control cable. |
| faulty connections. See wiring |
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| Replace if “open”. |
| diagram. |
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| 4. The welding gun may be faulty. |
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| Check or replace. |
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The wire continues to feed with the | 1. | Disconnect the gun trigger cable. | 1. | The 1CR relay may be stuck |
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gun trigger open, and the wire is |
| If the problem is solved, the gun |
| closed. Perform the 1CR Relay | |||
electrically “hot”. The interlock |
| trigger or cable is faulty. Repair |
| Test. |
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switch is in the “off” position. |
| or replace. |
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| 2. | Check the relay board. Replace | |
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| if faulty. |
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With the interlock switch (S2) in the | 1. | Check leads #529 and #528 for | 1. | The 2CR reed switch may be |
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“ON” postion, the wire feed stops |
| loose or faulty connections |
| faulty. Check to see if it closes | |||
when the gun trigger is released. |
| between the 2CR reed switch |
| when welding. |
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| and the control board and motor |
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| thermal circuit breaker. See | 2. | Check the interlock switch (S2) | |
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| wiring diagram. |
| for proper operation. |
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| 3. | Check the continuity (zero ohms) | |
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| of leads #523 and #536 between | |
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| the interlock switch (S2) and the | |
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| relay board. See wiring diagram. | |
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| 4. | The relay board may be faulty. |
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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
