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TROUBLESHOOTING AND REPAIR | ||
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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED | ||||
(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION | ||||
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| OUTPUT PROBLEMS |
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No weld output in AC or DC Modes. | 1. | Check | the | welding | cables, | 1. Disconnect lead W1 from the | |
The auxiliary power (480, 23 & |
| clamps and electrode holder for | Output Bridge (D1) and check | ||||
115VAC) is normal. Engine runs |
| loose or broken connections. | for the presence of 80VAC from | ||||
normally. | 2. | Check | the open circuit | voltage | lead W1 to lead W2 on the main | ||
| stator winding. See the Wiring | ||||||
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| (OCV) at the welder output termi- | |||||
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| Diagram. | If the AC voltage is | ||||
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| nals, engine | at high idle (3650 | ||||
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| NOT present, the winding in the | |||||
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| RPM). Normal maximum is 73 to | |||||
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| stator may be faulty. Check the | |||||
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| 80VAC. Normal DC maximum is | |||||
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| winding for continuity and test to | |||||
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| 67 to 72VDC. If the OCV is OK | |||||
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| be sure it is NOT grounded to | |||||
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| then proceed to Step #2. |
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| the stator iron. Replace the | ||||
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| Sstator if necessary. If the cor- | |
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| rect AC voltage is present, pro- | |
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| ceed to step #2. | |
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| 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 sure | |
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| it is NOT grounded to the choke | |
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| iron. |
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| 4. Check the weld output terminals | |
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| and associated wires for loose | |
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| or faulty connections. | |
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| 5. Perform the Output Bridge | |
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| Test. |
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No DC welding output. AC welding | 1. | Make sure the Polarity Switch is | 1. Perform the Output Bridge Test. | ||||
output and auxiliary power is nor- |
| in the proper position and is | 2. Check the | Choke (L1), the | |||
mal. |
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| “seated” correctly. |
| Polarity Switch (S2) and associ- | ||||
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| 2. Make | sure | the electrode and | ated wires for loose or faulty | |||
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| polarity are correct for the | connections. Check the choke | ||||
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| process being used. |
| winding for continuity and test to | |||
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| be sure it is NOT grounded the | |
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| choke iron. |
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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
