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 | |||
|
|
|
|
|
| |
|
| OUTPUT PROBLEMS (Continued) |
|
|
| |
|
|
|
|
| ||
The output voltage and wire feed is | 1. | Remove the gun. If the problem | 1. | Check the machine's internal | ||
present continuously | or pulsing |
| is resolved the gun trigger circuit |
| trigger leads for grounds or | |
when gun trigger is NOT activated. |
| is faulty. Repair or replace. |
| shorts. See Wiring Diagram. | ||
|
| 2. | If problem persists when gun | 2. | The control board may be faulty. | |
|
|
| assembly is removed from |
| Replace. |
|
|
|
| machine, then the problem is |
|
|
|
|
|
| within the POWER MIG 255. |
|
|
|
|
|
|
|
| ||
The output voltage is present contin- | Contact your local Lincoln Electric | 1. | Perform the SCR | Rectifier | ||
uously when gun trigger is NOT acti- | Authorized Field Service Facility. |
| Assembly Tests. |
| ||
vated. |
|
|
|
|
|
|
|
|
|
| 2. | 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 test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
