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TROUBLESHOOTING & REPAIR | |||||||
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TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | ||
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| detailed in the beginning of this manual. | ||
PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION | |||
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| OUTPUT PROBLEMS |
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No weld output, the auxiliary | 1. | Check the open circuit voltage | 1. Disconnect lead W1 from the | ||||
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| (OCV) at the welder output ter- | Output Bridge (D1) and check | ||||
normally. Engine runs normally. |
| minals, engine at high idle (3650 | for the presence of 80VAC from | ||||
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| RPM). Normal maximum is 73 | lead W1 to lead W2 on the main | |||
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| to 80VAC. | Normal DC maxi- | stator winding. See wiring dia- | ||
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| mum is 67 to 72VDC. | If the | gram. If the AC voltage is NOT | ||
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| OCV is OK then proceed to | present, the winding in the sta- | |||
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| Step #2. If the OCV is not pre- | tor may be faulty. | Check the | ||
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| sent at the welder output termi- | winding for continuity and test | |||
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| nals, contact your local Lincoln | to be sure it is NOT grounded to | |||
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| Authorized | Field | Service | the stator iron. Replace if nec- | |
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| Facility. |
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| essary. If the correct AC volt- | |
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| 2. | Check the | welding | cables, | age is present, proceed to step | |
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| clamps and electrode holder for |
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| loose or broken connections. | 2. Check the Reactor, Range | |||
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| Switch (S1) and | associated |
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| wires for loose or faulty connec- | |
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| tions. Check the reactor wind- | |
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| ing for continuity and test to be | |
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| sure it is NOT grounded to the | |
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| reactor iron. |
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| 3. Check the Choke (L1), Polarity | |
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| Switch (S2) and | associated |
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| wires for loose or faulty connec- | |
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| tions. Check the choke winding | |
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| for continuity and test to be | |
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| sure it is NOT grounded to the | |
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| choke iron. |
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| 4. Check the weld output termi- | |
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| nals and associated wires for | |
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| loose or faulty connections. | |
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| 5. Perform the Output Bridge | |
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| Test. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
