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TROUBLESHOOTING & REPAIR |
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| Observe Safety Guidelines |
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| 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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| OUTPUT PROBLEMS |
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Major physical or electrical damage | 1. Contact | your local authorized | 1. Contact the Lincoln Electric | ||||||
is evident when the sheet metal | Lincoln | Electric Field Service | Service Department, |
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cover is removed. |
| Facility for technical assistance. |
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The machine is | 1. Make sure the input line switch is | 1. Perform | the | Auxiliary |
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no LED’s. |
| in the ON position. | Transformer Test. |
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| 2. Check the main input line fuses. | 2. Perform the DC Bus Board Test. | |||||
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| If open , replace. | ||||||
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| 3. Check the 15 amp circuit break- | 2. Perform the Power Board Test. | |||||
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| er (CB1). Reset if tripped. Also | 3. The Bus Board rectifier and or | |||||
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| check CB3. | ||||||
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| associated filter | capacitor | (C5) | ||||
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| 4. Make sure the reconnect switch | may be | faulty. | Check | and | ||
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| replace as necessary. |
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| and jumper lead is configured |
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| correctly | for the applied input | 4. The Control Board may be faulty. | ||||
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| voltage. |
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| 5. If the machine is being operated |
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| with single phase input voltage |
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| make sure the correct lead is not |
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| connected. See the Installation |
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The main input fuses (or breaker) | 1. Make certain the fuses or break- | 1. | Check the reconnect | switches | ||
repeatedly fail. | ers are sized properly. |
| and associated wiring. | See the | ||
| 2. Make sure the reconnect switch |
| Wiring Diagram. |
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| Input | Rectifier | |
| and jumper lead is configured | 2. | Perform | the | ||
| correctly for the applied input |
| Test. |
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| voltage. | 3. | Perform the Main Switch Board | |||
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| 3. The welding procedure may be |
| Test. |
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| drawing too much input current | 4. | Perform | the | Output Diode | |
| or the duty cycle may be too | |||||
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| Module Test. |
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| high. Reduce the welding cur- |
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| rent and /or reduce the duty | 5. | The Input Filter Capacitors may | |||
| cycle. |
| be faulty. | Check, and if any are | ||
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| faulty replace all four. |
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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
