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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. | |||
| PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
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| (SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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| MISC. WELD ISSUES |
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| The machine welds normally in all | 1. | It is normal for one of the dis- | 1. NOTE: Both the “AMPS” and | |||
| modes and the range of weld out- |
| plays to be off when there is no | the “VOLTS” front panel dis- | |||
| put seems normal, but one or both |
| load across the weld output ter- | plays use the same part num- | |||
| of the front panel displays is blank. |
| minals. In | bered display unit. If one of the | |||
| displaying an obviously | incorrect |
| the “VOLTS” display will be illu- | digital displays appears to be | ||
| value, or only parts of numbers are |
| minated, in all other modes only | functioning normally, it can be | |||
| illuminated. |
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| the “AMPS” display will be illu- | used to test the weld control PC | ||
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| minated. | board output to the malfunction- | ||
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| ing display. |
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| 2. If the known good display func- | ||
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| tions normally when plugged in, | ||
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| in place of the malfunctioning | ||
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| display, the weld control PC | ||
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| board is good and only the mal- | ||
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| functioning display unit | should | |
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| be replaced. |
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| 3. If the known good display | ||
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| exhibits the same type of prob- | ||
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| lem as the malfunctioning dis- | ||
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| play, the weld control PC board | ||
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| is defective and should be | ||
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| replaced. |
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| A control cable type wire feeder | 1. Check circuit breaker CB1 if | 1. Use a volt meter to check for the | ||||
| does not function when connected |
| using a | presents of supply voltage at | |||
| to the 14 pin amphenol receptacle. |
| er. Check CB8 if using a 42 | the 14 pin Amphenol receptacle. | |||
| Machine operates normally in CC- |
| VAC wire feeder. Reset circuit | ||||
| STICK mode, and has normal AC | 2. | breaker if tripped. | through pins A and J, 42 VAC | |||
| auxiliary output. |
| Check the Amphenol receptacle | power is supplied through pins | |||
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| for damaged, corroded, or dirty | 1 and K. |
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| contact pins. | 2. NOTE: Be careful that meter | ||
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| 3. The wire feeder control cable | probes do not deform or dam- | |||
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| age the contact pins in the | ||||
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| 4. | may be defective. | Amphenol receptacle. |
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| The wire feeder may be defec- | 3. Perform the STATOR VOLT- | |||
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| tive. | AGE 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, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
