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 |
| |||
|
|
|
|
|
|
|
| OUTPUT PROBLEMS |
|
|
|
|
|
Major Physical or Electrical | 1. Contact your local Lincoln | 1. Contact The Lincoln Electric | ||||
Damage is Evident. | Authorized Field Service |
| Service Dept. | |||
| Facility. |
| (WELD). |
|
|
|
|
|
|
| |||
No weld output and no auxiliary | 1. Check the brushes for wear and | 1. | Perform the Rotor Voltage Test. | |||
power. Engine runs normally. | proper contact to the rotor slip | 2. | Check | for the | presence of | |
| rings. | |||||
|
| 12VDC (at the pc board) from | ||||
|
|
| ||||
|
|
| lead #216 to frame ground. This | |||
|
|
| is the “flashing” voltage and is | |||
|
|
| present only when the Start, | |||
|
|
| Run, Stop switch S3 is in the | |||
|
|
| “Start” position. If the 12 VDC is | |||
|
|
| missing | check | the | leads, |
|
|
| switches and connections asso- | |||
|
|
| ciated with the lead #216. See | |||
|
|
| Wiring Diagram. |
|
| |
|
|
| Check for the presence of 12 | |||
|
|
| VDC (at the pc board) from lead | |||
|
|
| #224 to frame ground. This is | |||
|
|
| the supply voltage to the board | |||
|
|
| and is present when the engine | |||
|
|
| is running and the S3 switch is | |||
|
|
| in the “Run” position. If the | |||
|
|
| 12VDC is missing check the | |||
|
|
| leads, switches and connec- | |||
|
|
| tions associated with the lead | |||
|
|
| #224. See Wiring Diagram. | |||
|
| 3. If Rotor Voltage Test is normal, | ||||
|
|
| then | preform | the | Rotor |
|
|
| Resistance Test. |
|
| |
|
| 4. If the Rotor Voltage Test is NOT | ||||
|
|
| normal, | perform | the | Auxiliary |
|
|
| and Field Winding Voltage Test. | |||
|
|
| Then check the Field Diode | |||
|
|
| Bridge (D2) and the Field | |||
|
|
| Capacitor (C1). Replace if nec- | |||
|
|
| essary. If the Field Bridge and | |||
|
|
| Field Capacitor are good, then | |||
|
|
| the Printed Circuit 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
