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TROUBLESHOOTING & REPAIR |
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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 |
| RECOMMENDED |
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(SYMPTOMS) | MISADJUSTMENT(S) |
| COURSE OF ACTION | |||||||
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| FUNCTION PROBLEMS |
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The machine often "noodle welds" | 1. The machine may be trying to | 1. | Perform |
| the | Current | ||||
when running a particular process. | deliver too much power. When |
| Transducer Test. |
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The output is limited to approxi- | the average output current | 2. | The Control | Board | may be | |||||
mately 100 amps. | exceeds 570 | amps, | the | |||||||
| faulty. |
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| machine will "phase back" to |
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| protect itself. Adjust the proce- |
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| dure or reduce the load to lower |
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| the current draw from the Power |
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| Wave 455R machine. |
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The Power Wave 455R will not pro- | 1. The input voltage may be too | 1. | Perform | the | Output | Rectifier | ||||
duce full output. | low, limiting the output capability |
| Test. |
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| of the machine. | Make certain | 2. | Perform | the | Current Trans- | ||||
| the input voltage is correct | for | ||||||||
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| ducer Test. |
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| the machine and the reconnect |
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| panel configuration. |
| 3. | Perform the Power Board Test. | ||||||
| 2. Make sure all three phases of | 4. | The Control Board may be | |||||||
| input power are being applied to |
| faulty. |
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| the machine. |
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| 5. | If using the STT output terminal, | |||||
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| 3. If using the STT output terminal, |
| the STT Chopper Board may be | |||||||
| be aware that the STT output is |
| faulty. See the Wiring Diagram. | |||||||
| limited to 325 amps. |
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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
