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| TROUBLESHOOTING & REPAIR | |
| TROUBLESHOOTING GUIDE | Observe Safety Guidelines |
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| detailed in the beginning of this manual. |
PROBLEMS | POSSIBLE AREAS OF |
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(SYMPTOMS) | MISADJUSTMENT(S) |
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| OUTPUT PROBLEMS |
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No weld output, the auxiliary | 1. | If the Polarity mode switch (S1) | 1. If OCV | is present in the CC | ||||||||||
power |
| is in a constant voltage (CV) |
| mode but NOT in the CV mode, | ||||||||||
normally. Engine operates normal- |
| position, make sure the CV out- |
| check the CV output contactor | ||||||||||
ly. |
| put contactor is activating. |
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| and also the Polarity mode | |||||||||
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| 2. With the Polarity mode switch |
| switch (S1). |
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| (S1) is in a constant current | 2. | If OCV is absent in both modes | |||||||||
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| (CC) position, check the open |
| (CV and CC), disconnect lead | |||||||||
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| circuit voltage at the welder |
| W1 from the output bridge (D1). | |||||||||
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| output terminals. Normal AC is |
| With the engine at high idle and | |||||||||
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| 70 to 76VAC. Normal DC is 61 |
| the output control at maximum, | |||||||||
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| to 68VDC. | If the OCV is OK, |
| check for 70 to 76VAC from | ||||||||
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| proceed to Step #2., If the OCV |
| lead W1 to lead W2 on the main | |||||||||
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| is NOT present at the welder |
| transformer. | See | Wiring | |||||||
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| output terminals, contact | your |
| Diagram. If the AC voltage is | ||||||||
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| local Lincoln | Authorized | Field |
| NOT present, the winding may | |||||||
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| Service Facility. |
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| be faulty. Check the winding for | |||||||
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| 3. | Check | the | welding | cables, |
| continuity and test to be sure it | ||||||
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| is NOT grounded to the stator | |||||||||||
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| clamps, | and | electrode | holder |
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| iron. Replace if necessary. If | ||||||||||
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| for loose | or | broken connec- |
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| the correct voltage is | present, | |||||||||
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| proceed to step #3. |
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| 3. | Check | the | reactor, | Range | |
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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 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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| 4. Check the choke (L1), Polarity | |||||
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| mode switch (S1), and associ- | ||||
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| ated wires for loose or faulty | ||||
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| connections. Check the choke | ||||
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| winding for continuity and test | ||||
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| to be sure it is NOT grounded to | ||||
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| the choke iron. |
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| 5. 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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| 6. Perform | the Output Rectifier | ||||
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| Bridge Test. |
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| CAUTION |
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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
RANGER
