Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
| |||||
|
| TROUBLESHOOTING & REPAIR |
| ||
|
| Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE | |
|
| detailed in the beginning of this manual. |
|
| |
|
|
|
|
| |
|
| PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | |
|
| (SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | |
|
|
|
|
|
|
|
|
| WELDING PROBLEMS |
|
|
|
| Poor arc characteristics in all | 1. Check the | 1. Check the weld mode switch | |
|
| processes. | line voltage at the machine. | (SW2) and associated leads for | |
|
|
| The input voltage must match | proper operation or loose or | |
|
|
| the rating plate and reconnect | faulty connections. See the | |
|
|
| panel. | Wiring Diagram. | |
|
|
| 2. Check the welding cables for | 2. Perform the Firing Board Test. | |
|
|
| loose or faulty connections. | 3. Perform the SCR Bridge Test. | |
|
|
|
| ||
|
|
| 3. Make sure the proper welding | 4. Perform the Main Transformer | |
|
|
| procedures are being used. | ||
|
|
| Test. | ||
|
|
| (Wire feed speed, arc voltage | ||
|
|
|
|
| |
|
|
| and wire size) | 5. The control board may be | |
|
|
| 4. Make sure the negative welding | faulty. See the Control Board | |
|
|
| LED Chart. | ||
|
|
| cable is connected to the cor- | ||
|
|
|
|
| |
|
|
| rect negative output terminal. |
|
|
|
|
| (Low or High inductance) |
|
|
|
|
|
|
| |
|
| Poor arc striking with semiauto- | 1. Make sure the proper welding | 1. Perform the Firing Board Test. | |
|
| matic or automatic wire feeders. | procedures are being used. | 2. Perform the SCR Bridge Test. | |
|
|
| (Wire feed speed, arc voltage | ||
|
|
|
|
| |
|
|
| and wire size) | 3. The control board may be | |
|
|
| 2. Check the welding cables for | faulty. See the Control Board | |
|
|
| LED Chart. | ||
|
|
| loose or faulty connections. | ||
|
|
|
|
| |
|
|
|
|
|
|
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
