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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE | ||||
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 Auxiliary Receptacle is "dead." | 1. Check the 10 amp circuit break- | 1. Check the receptacle and asso- | ||||
The 120VAC is not present at the | er (CB2) located on the case | ciated wiring for loose or faulty | ||||
receptacle. | front. Reset if necessary. | connections. |
| See | the Wiring | |
| 2. Check the 6 amp circuit breaker | Diagram. |
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| (CB4) located in the reconnect | 2. Perform the T2 Auxiliary | ||||
| area. Reset if necessary. | Transformer Test. |
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| 3. Make sure all three phases of |
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| input power are being applied to |
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| the machine. |
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The Power Wave 455R is "trig- | 1. Make sure that the triggering | Use troubleshooting | software to | |||
gered" for output but there is no | method and device is correct | find the problem. | Contact Lincoln | |||
welding output. | and operating properly. | Electric Service | Department to | |||
| 2. Check circuit breaker CB4. | obtain software. |
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| Reset if tripped. |
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When in the STT mode, | 1. Make certain the work sense | 1. Perform the STT Chopper | ||||
the spatter is higher than normal | lead (21) is connected properly. | Board Test. |
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and the arc is inconsistent. | 2. Make certain the electrode | 2. Perform | the | Current | ||
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| cable is connected only to the | Transducer (STT) Test. | ||||
| STT output terminal and NOT | 3. The Control |
| Board may be | ||
| the Power Wave positive output |
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| faulty. |
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| terminal. |
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| 3. Make sure the welding parame- |
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| ters are correct for the process. |
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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
