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 AND REPAIR |
| ||||||
Troubleshooting Guide – See Wiring Diagrams for location of specified | Observe Safety Guidelines | ||||||
components. See Wiring Diagrams for troubleshooting of specific circuits. |
| detailed in the beginning of this manual. | |||||
|
|
|
|
|
| ||
PROBLEMS |
| POSSIBLE AREAS OF |
| RECOMMENDED |
| ||
(SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
| ||
|
|
|
|
| |||
| FUNCTIONAL PROBLEMS (Continued) |
| |||||
Wire feed speed adjustment is | 1. Ensure | setscrew on | the | 1. Check the resistance | of the | ||
rough. Works only at certain |
| potentiometer knob is tight. | potentiometer over the | entire | |||
portions of the speed range. |
|
|
|
| range of travel. The potentio- | ||
|
| 2. Check for a clogged gun liner or | meter should adjust from 0 to | ||||
|
|
| a mechanical restriction in the | 10K Ohms. If adjustment is not | |||
|
|
| wire feeding path. |
| smooth and linear, replace per | ||
|
|
|
|
|
| Wire Feed Speed Potentio- | |
|
|
|
|
|
| meter Replacement procedure. | |
|
|
|
|
|
| 2. The motor or motor brushes | |
|
|
|
|
|
| may be faulty. Check the motor | |
|
|
|
|
|
| brushes length, and replace | |
|
|
|
|
|
| them if they are less than 1/4 in. | |
|
|
|
|
|
| in length. |
|
|
|
|
|
|
| ||
Ground Lead Protector circuit | 1. | Ensure | all work | lead | Check for grounded leads in the | ||
tripping. |
|
| connections to the work make | wiring harness. Pay particular | |||
|
|
| tight | attention to the leads connecting | |||
|
|
|
|
|
| the input cable connector (J101) to | |
|
| 2. | Ensure that excess work and | the Control PC board. See Wiring | |||
|
|
| input cables are stored more | Diagrams in the Electrical Diagrams | |||
|
|
| than 3 ft (1 m) from the wire | Section. |
| ||
|
|
| feeder. |
|
|
|
|
|
| 3. Is input cable coiled next to the |
|
| |||
|
|
| work cable? Uncoil and loop |
|
| ||
|
|
| back and forth in 3 to 6 ft (1 to |
|
| ||
|
|
| 2 m) straight lengths to elimi- |
|
| ||
|
|
| nate the coil. |
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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
