| TROUBLESHOOTING | ||
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| Observe all Safety Guidelines detailed througout this manual | ||
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| PROBLEMS | POSSIBLE CAUSE | RECOMMENDED |
| (SYMPTOMS) | COURSE OF ACTION | |
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| FUNCTION PROBLEMS |
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A. Input contactor chatters. | 1.Faulty input contactor. | 1.Repair or replace. | |
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| 2.Low line voltage. | 2.Check with Power Company. |
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B. Machine input contactor does not | 1.Supply line fuse blown. | 1.Replace (look for reason for | |
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| blown fuse first). | |
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| 2.Power circuit dead. | 2.Check voltage. |
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| 3.Broken or loose power lead. | 3.Repair. |
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| 4.Wrong voltage. | 4.Check voltage against |
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| instructions. |
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| 5.Thermostats tripped. (High | 5.a. Make sure the fan is operating |
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| Temperature Warning Light | and that there are no obstruc- |
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| should be lit.) (Welder | tions to free flow of air. |
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| overheated.) | b. Operate at normal current |
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| and duty cycle. |
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| c. Replace High Temperature |
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| Warning Light if defective. |
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| 6.Input contactor coil open. | 6.Replace. |
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| 7.Open winding on 115V pilot | 7.Replace. |
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| transformer. |
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| 8.Power | 8.Replace. |
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| closing. |
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| 9.Lead broken or loose connec- | 9.Replace. |
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| tion in 115V starter circuit. |
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| 10.Thermostats defective. (High | 10.Turn input power off (115V cir- |
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| Temperature Warning Light | cuit is hot when input power is |
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| should be lit.) | connected). Check thermostats |
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| with continuity meter – should |
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| read |
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| is cool. Replace if defective. |
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| There are two thermostats; one |
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| on the secondary lead and one |
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| on the choke. Replace High |
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| Temperature Warning Light if |
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| defective. |
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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 your Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
E500