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TROUBLESHOOTING & REPAIR | |||||||
TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | ||
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| detailed in the beginning of this manual. | |||
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PROBLEMS |
| POSSIBLE AREAS OF |
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(SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION | |||
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| OUTPUT PROBLEMS |
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Major Physical or Electrical Damage | 1. | Contact your local Lincoln | 1. | Contact | The Lincoln Electric | ||
is Evident |
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| Electric Authorized Field Service |
| Service Dept. | ||
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| Facility. |
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| 1. | Check input power switch (S1). | |
Machine is dead — no open circuit | 1. | Make certain that the input |
| It may be faulty. | |||
voltage output and no wire feed |
| power switch is in the "ON" posi- |
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when gun trigger is pulled. The |
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| 2. | Check for lose or broken wires | ||
machine display may be lit. |
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| at the reconnect panel. | |
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| 2. | Check the input voltage at the |
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| machine. Input voltage must | 3. | Perform | Main Transformer | |
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| match the rating plate and the |
| Test. |
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| reconnect panel. |
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| 4. | Perform Rectifier Diode Bridge | |
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| 3. | Blown or missing fuses in the |
| Test. |
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| input line. |
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| 5. | Check | the thermostats and |
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| 4. | The thermostats may be open |
| associated leads for loose or | ||
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| due to machine overheating. | If |
| broken connections. See wiring | |
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| machine operates normally after |
| diagram. | ||
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| a cooling off period then check |
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| for proper fan operation and | 6. | The control board may be faulty. | ||
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| ventilation. Make certain that the |
| Replace. | ||
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| machine's duty cycle is not |
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| being exceeded. |
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| 5. | Check the trigger circuit. Leads |
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| #324 to #325 should have conti- |
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| nuity (zero ohms) when the gun |
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| trigger is pulled. If not then the |
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| gun may be faulty — replace. |
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| 6. Make sure unit is not connected |
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| to a portable generator. |
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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
