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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 | 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. | Check the continuity (low resis- | |||
power | (OCV) at the welder output ter- |
| tance) from the positive output | |||
mally. Engine runs normally. | minals. Normal is 75 to 82VDC |
| terminal, | through the | choke | |
| with engine at high idle (3750 |
| (L1), to the positive side of the | |||
| RPM) and the output rheostat at |
| output rectifier bridge (D2). See | |||
| maximum. If the correct OCV is |
| Wiring Diagram. |
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| present, go to Step 3, below. | 2. | Check the | continuity | (zero | |
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| 2. If the open circuit voltage is |
| ohms) from the negative output | |||
| NOT present at the welder out- |
| terminal to the negative side of | |||
| put terminals, contact your |
| the output rectifier bridge (D2). | |||
| local Lincoln Electric Authorized |
| See Wiring Diagram. |
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| Field Service Facility. | 3. Perform | the Output Rectifier | |||
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| 3. Check the welding cables, |
| Bridge Test. |
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| clamps and electrode holder for | 4. | Perform | the | Main | Stator |
| loose or broken connections. | |||||
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| Winding 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
WELDANPOWER 125
