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 |
|
|
|
|
|
|
| |||
Machine has low welding output | 1. | If a remote control unit is NOT | 1. | If the engine high idle RPM is | ||||||||
and low auxiliary output. |
| connected | to | the | machine, |
| low, perform | the | Throttle | |||
|
| make sure the REMOTE switch |
| Adjustment Test. |
|
| ||||||
|
| is in the | proper | position – | 2. | Perform | the | Rotor | Voltage | |||
|
| “MACHINE CONTROL.” | ||||||||||
|
|
| Test. |
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
| |
| 2. | The brushes may | be worn. | 3. | If the rotor voltage is low, the | |||||||
|
| Contact your | local Lincoln | |||||||||
|
|
| field capacitor (C1) or the field | |||||||||
|
| Authorized | Field | Service |
| |||||||
|
|
| bridge (D2) may be faulty. Test | |||||||||
|
| Facility. |
|
|
|
| ||||||
|
|
|
|
|
| and replace if necessary. | ||||||
|
|
|
|
|
|
| ||||||
| 3. The Engine RPM may be low. | 4. | Check | the |
| output |
| control | ||||
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
| potentiometer | (R1). | Normal | |||
|
|
|
|
|
|
| resistance | is | 10,000 | ohms. | ||
|
|
|
|
|
|
| Also check | associated | wiring | |||
|
|
|
|
|
|
| for loose or faulty connections. | |||||
|
|
|
|
|
| 5. | The rotor may be faulty. | |||||
|
|
|
|
|
|
| Perform the Rotor Resistance | |||||
|
|
|
|
|
|
| Test. |
|
|
|
|
|
|
|
|
|
|
| 6. | The control board may be | |||||
|
|
|
|
|
|
| faulty. Replace. |
|
| |||
|
|
|
|
|
| 7. | If the engine high idle RPM is | |||||
|
|
|
|
|
|
| OK, then the engine may have | |||||
|
|
|
|
|
|
| lost horsepower and be in need | |||||
|
|
|
|
|
|
| of major repair. |
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
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
RANGER
