Return to Master TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
TROUBLESHOOTING & REPAIR |
|
|
|
| ||||||
|
|
|
|
|
| |||||
| TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual | |||||||||
|
|
|
|
|
|
| ||||
| PROBLEMS |
| POSSIBLE AREAS OF |
| RECOMMENDED |
| ||||
| (SYMPTOMS) |
| MISADJUSTMENTS(S) |
| COURSE OF ACTION | |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| WELDING PROBLEMS |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The arc is unstable and or "hunting". | 1. | Check for worn or melted con- | 1. | Check for loose connections at | ||||||
|
|
| tact tip. |
| the output terminals, the choke, | |||||
|
|
|
|
| the capacitor bank and all heavy | |||||
|
| 2. | Check for loose or faulty con- |
| current carrying leads. |
| ||||
|
|
| nections on the work and elec- |
|
|
|
|
|
|
|
|
|
| trode cables. | 2. | Make sure that the transformer | |||||
|
|
|
|
| secondary |
| leads | are | securely | |
|
| 3. | Make sure electrode polarity is |
| connected to the SCR Rectifier | |||||
|
|
| correct or welding process being |
| Assembly. |
|
|
|
| |
|
|
| used. |
|
|
|
|
|
|
|
|
|
|
| 3. | The output capacitor bank may | |||||
|
| 4. | Check for rusty or dirty wire. |
| be faulty. | Check for loose con- | ||||
|
|
|
|
| nections at the capacitors. Also | |||||
|
| 5. | Make sure machine settings and |
| check | for | leaky | capacitors. | ||
|
|
| gas are correct for process |
| Replace if necessary. |
| ||||
|
|
| being used. |
| WARNING: | The | liquid elec- | |||
|
|
|
|
| trolyte in these capacitors is | |||||
|
|
|
|
| toxic. Avoid contact with any | |||||
|
|
|
|
| portion of your body. |
| ||||
|
|
|
| 4. | The control board may be faulty. | |||||
|
|
|
|
| Replace. |
|
|
|
| |
|
|
|
|
| ||||||
Weld bead is narrow or ropey. May | 1. | Make sure the weld procedure | 1. | The output capacitor bank may | ||||||
have porosity with electrode stub- |
| and electrode polarity is correct |
| be faulty. | Check for loose con- | |||||
bing into plate. |
| for the process being used. |
| nections at the capacitors. Also | ||||||
|
|
|
|
| check | for | leaky | capacitors. | ||
|
| 2. | Make sure shielding gas is cor- |
| Replace if necessary. |
| ||||
|
|
| rect and flow is proper. |
| WARNING: | The | liquid elec- | |||
|
|
|
|
| trolyte in these capacitors is | |||||
|
| 3. | Make sure the weld joint is not |
| toxic. Avoid contact with any | |||||
|
|
| "contaminated". |
| portion of your body. |
| ||||
|
|
|
| 2. | Perform |
| the SCR | Rectifier | ||
|
|
|
|
| Assembly Test. |
|
| |||
|
|
|
| 3. | The control board may be faulty. | |||||
|
|
|
|
| Replace. |
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call 216-