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 |
|
|
| |||||||||
TROUBLESHOOTING GUIDE |
|
|
| Observe Safety Guidelines | |||||||||
|
|
|
|
|
|
|
|
|
| detailed in the beginning of this manual. | |||
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
| |||
| PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
| ||||||||
| (SYMPTOMS) |
|
|
| MISADJUSTMENT(S) |
|
| COURSE OF ACTION |
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
| TIG WELDING PROBLEMS |
|
|
|
|
|
| |
| High frequency “Spark” is present |
|
| 1. | Torch may be faulty. |
|
| This may be a welding procedure |
|
| |||
| at tungsten electrode, but operator |
|
|
|
|
|
| problem. |
|
| |||
| is unable to establish a welding arc. |
|
| 2. If an amptrol is not being used, |
|
|
|
|
|
| |||
| Machine has normal open circuit |
|
|
| then the machine must be in |
|
| Contact The Lincoln Electric |
|
| |||
| voltage (approximately 53V). |
|
|
|
| the Local Control Mode. |
|
| Service Department (216) 383- |
|
| ||
|
|
|
|
|
| 3. Tungsten electrode may be |
|
| 2531 or |
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
| too large for the process. |
|
|
|
|
|
|
|
|
|
|
|
| 4. If helium shielding gas is being |
|
|
|
|
|
| |
|
|
|
|
|
|
| used, then reduce percentage |
|
|
|
|
|
|
|
|
|
|
|
|
| of helium. |
|
|
|
|
|
|
|
|
|
|
|
| 5. If TIG welding in the DC |
|
|
|
|
|
| |
|
|
|
|
|
|
| negative mode, then a properly |
|
|
|
|
|
|
|
|
|
|
|
|
| sharpened thoriated tungsten |
|
|
|
|
|
|
|
|
|
|
|
|
| should be used. |
|
|
|
|
|
|
|
|
|
|
|
| 6. Check the welding cables and |
|
|
|
|
|
| |
|
|
|
|
|
|
| output stud connections. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
| No high frequency. Machine is |
|
| 1. | In order for the high frequency |
|
| 1. Check the high voltage trans- |
|
| |||
| in the TIG Mode and has normal |
|
|
| to operate, the machine must |
|
|
|
| ||||
|
|
|
|
|
| former (T3). The normal resis- |
|
| |||||
| output. |
|
|
|
| be either in the start only |
|
|
|
| |||
|
|
|
|
|
|
| tance of the secondary winding |
|
| ||||
|
|
|
|
|
|
| Mode or the continuous high |
|
|
|
| ||
|
|
|
|
|
|
|
|
| of the high voltage transformer |
|
| ||
|
|
|
|
|
|
| frequency mode. |
|
|
|
| ||
|
|
|
|
|
|
|
|
| is 12.5k ohms. 115vac is |
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
| 2. The high frequency spark gap |
|
| applied to the primary of T3. A |
|
| ||
|
|
|
|
|
|
|
| very high voltage is developed |
|
| |||
|
|
|
|
|
|
| may be too large or shorted. |
|
|
|
| ||
|
|
|
|
|
|
|
|
| on the secondary winding. For |
|
| ||
|
|
|
|
|
|
| Check gap as per |
|
|
|
| ||
|
|
|
|
|
|
|
|
| assistance call The Lincoln |
|
| ||
|
|
|
|
|
|
| maintenance instructions. |
|
|
|
| ||
|
|
|
|
|
|
|
|
| Electric Service Department. |
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| (216) |
|
| |
|
|
|
|
|
|
|
|
|
| 9353 (WELD). |
|
| |
|
|
|
|
|
|
|
|
|
| 2. Check the values of R3, R4 |
|
| |
|
|
|
|
|
|
|
|
|
| and C2. Replace if faulty. |
|
| |
|
|
|
|
|
|
|
|
|
| 3. The Protection/Snubber board |
|
| |
|
|
|
|
|
|
|
|
|
| may be faulty. See |
|
| |
|
|
|
|
|
|
|
|
|
| Protection/Snubber Board |
|
| |
|
|
|
|
|
|
|
|
|
| Continuity Test. |
|
| |
|
|
|
|
|
|
|
|
|
| 4. 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, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call
