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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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| OUTPUT PROBLEMS |
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No welding output in either CV or |
| 1. | Contact | your local Lincoln | 1. | Check for loose or faulty con- | |||
stick modes. Also no auxiliary |
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| Authorized Field Service Shop. |
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power. Engine operates normally. |
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| T3 capacitor | connection block | ||
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| and back to the capacitor bank. | |||
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| On machines equipped with | |||
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| ule asbly check leads T1, T2 and | |||
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| T3 for faulty connections. See | |||
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| the Wiring Diagram. |
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| 2. | Perform the Exciter Capacitor | |||
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| Bank Test. |
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| 3. | Check for a short across the | |||
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| weld bridge plates. |
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| 4. | Disconnect leads 3, 5 & 6 from | |||
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| the terminal block located inside | |||
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| the right hand side of the control | |||
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| box. Check for a short across | |||
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| each | 115v | and | 115V/230V |
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| receptacle. |
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| 5. | Check fro shorts or opens in the | |||
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| stator by performing the Stator | |||
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| Resistance Test. |
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| 6. | Perform the | Control Board | ||
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| Power Supply Test. |
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No auxiliary power at receptacles. |
| 1. | Check the circuit breakers CB1 | 1. | Check the GFCI receptacles and | ||||
The engine operates normally and |
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| thru CB4. Reset if tripped. |
| associated wires for loose or | ||||
the welding output is normal. |
| 2. | Check | the GFCI receptacles. |
| faulty | connections. | See the | |
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| Wiring Diagram. |
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| Reset if tripped. |
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| 3. Check for loose or faulty plugs at | 2. | Check the continuity of leads #3, | |||||
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| #5, #5A and #6 from the exciter | ||||||
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| the power receptacles. |
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| windings to their respective tie | |||||
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| points. See the Wiring Diagram. | |||
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| 3. | Perform the Stator Voltage 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, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-
