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 |
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| TIG MODE PROBLEMS |
|
|
|
|
|
|
|
|
| Machine output is intermittently |
|
| 1. Problem may be caused by |
|
| 1. | Internal ground connections |
| |||
|
| lost. Gas flow and high frequency |
|
| high frequency interference. |
|
|
| may be loose. Check mounting |
| |||
|
| are also interrupted. |
|
| Make sure that the machine is |
|
|
| screws on the Protection/ |
|
| ||
|
|
|
|
|
| grounded properly according |
|
|
| Snubber board and also on the |
| ||
|
|
|
|
|
| to the installation instructions. |
|
|
| Bypass board. All case screws |
| ||
|
|
|
|
|
| If there are other high |
|
|
| should be in place and tight. |
| ||
|
|
|
|
|
| frequency sources in the area, |
|
| 2. | Protection/Snubber board may |
| ||
|
|
|
|
|
| make certain that they are |
|
|
| ||||
|
|
|
|
|
| grounded properly. |
|
|
| be faulty. See Protection/ |
|
| |
|
|
|
|
|
|
|
|
|
| Snubber Board Continuity Test. |
| ||
|
|
|
|
|
| 2. Check arc start switch or |
|
| 3. | Check trigger circuit. See Arc |
| ||
|
|
|
|
|
| amptrol for proper operation |
|
|
| ||||
|
|
|
|
|
| and loose connections. |
|
|
| Start Trigger Circuit Test. |
|
| |
|
|
|
|
|
|
|
|
|
|
| |||
|
| Arc “Flutters” when TIG welding. |
|
| 1. Tungsten electrode may be |
|
| 1. | Check for loose shunt connec- |
| |||
|
|
|
|
|
| too large in diameter. |
|
|
| tions.- leads #221 and #222. |
| ||
|
|
|
|
|
|
|
|
|
| Refer to wiring diagram. |
|
| |
|
|
|
|
|
| 2. Tungsten not “Sharp” when |
|
| 2. | Check polarity switch for loose |
| ||
|
|
|
|
|
| welding in DC negative mode. |
|
|
| ||||
|
|
|
|
|
|
|
|
|
| or faulty connections. |
|
| |
|
|
|
|
|
| 3. If helium is used as a |
|
| 3. | SCR bridge may be faulty. See |
| ||
|
|
|
|
|
| shielding gas, then reduce the |
|
|
| ||||
|
|
|
|
|
| percentage of helium. |
|
|
| Static and Active SCR Tests. |
| ||
|
|
|
|
|
| 4. Adjust flow rate of shielding |
|
| 4. | Protection/Snubber board may |
| ||
|
|
|
|
|
| gas. |
|
|
| be faulty. See Protection/ |
|
| |
|
|
|
|
|
|
|
|
|
| Snubber Board Continuity Test. |
| ||
|
|
|
|
|
| 5. Check hoses and connections |
|
| 5. | Check R3, R4 and C2 in the |
| ||
|
|
|
|
|
| for leaks. |
|
|
| ||||
|
|
|
|
|
|
|
|
|
| high voltage transformer prima- |
| ||
|
|
|
|
|
|
|
|
|
| ry circuit. Refer to wiring dia- |
| ||
|
|
|
|
|
|
|
|
|
| gram. |
|
| |
|
|
|
|
|
|
|
|
| 6. | The Control board may be |
|
| |
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call
