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TROUBLESHOOTING & REPAIR | ||
Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE |
detailed in the beginning of this manual. |
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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No DC welding output. AC welding | 1. Make sure the Polarity mode | 1. Perform the Output Rectifier |
output and auxiliary power are nor- | switch (S1) is in the proper posi- | Bridge Test. |
mal. | tion and is “seated” correctly. | 2. Check the choke (L1), the |
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| 2. Make sure the electrode and | Polarity switch (S1), and associ- |
| polarity are correct for the | ated wires for loose or faulty |
| process being used. | 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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No AC welding output. DC weld- | 1. Make sure the Polarity mode | 1. Check the operation of the |
ing output and auxiliary power are | switch (S1) is in the proper | Polarity mode switch (S1). Also |
normal. | position and is “seated” cor- | check the associated wires for |
| rectly. | loose or faulty connections. |
| 2. Make sure the electrode is cor- | See Wiring Diagram. |
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| rect for the process being used. | 2. Check for continuity from lead |
| 3. Make sure the welding cables | “S2” to lead “E” located in the |
| main stator. See Wiring Dia- | |
| are not coiled or too long. | |
| gram. | |
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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
RANGER
