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TROUBLESHOOTING AND REPAIR | ||||||
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Observe Safety Guidelines detailed in the beginning of this manual. |
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PROBLEMS |
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| POSSIBLE AREAS OF |
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(SYMPTOMS) |
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| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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Machine is dead. No output - No | 1. | Make sure that the input power | 1. | Check the input power switch |
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fan - No 115 VAC at receptacle. |
| switch is in the "ON" position |
| and associated wires for loose | ||
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| and the machine is plugged in. |
| or faulty connections. |
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| 2. | Check the input voltage at the | 2. | Perform the T1 Transformer |
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| machine. Input voltage must |
| Test. |
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| match the rating plate and volt- |
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| age connection. Refer to |
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| Reconnect Procedure in the |
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| Installation section of this manu- |
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| al. |
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| 3. Blown or missing fuses in the |
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| input line. |
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| 4. |
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The fan runs normally. No output | 1. | Check for proper input voltages | 1. | Check for loose or faulty con- |
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from the machine in either Stick or |
| per nameplate and voltage |
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TIG modes. |
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| reconnect configuration. |
| carrying leads. (polarity switch, | |
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| output choke output terminals |
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| 2. | Check to make sure the polarity |
| etc.) |
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| switch is in the proper position |
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| and functioning correctly. | 2. | Perform the T1 Transformer |
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| Test. |
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| 3. Perform the SCR Bridge Test. | ||
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| 4. Check current control R1 for |
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| proper operation. Normal |
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| resistance is 10,000 ohms. |
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| Also check associated leads |
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| for loose or faulty connections. | |
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| 5. The control board may be |
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| faulty. Replace. |
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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
