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 |
|
|
|
|
|
|
|
| |||
No LEDs light when the | 1. Make sure input voltage | 1. |
| Check plug J7 (located on | |||||||||
ON/OFF Power Switch is turned | corresponds | to machine |
|
| the Control | Board) and | |||||||
"ON". Machine is dead. Fan | nameplate voltage. |
|
| associated wires for loose | |||||||||
runs normally. | 2. Make certain the reconnect |
|
| or faulty connections. | |||||||||
|
| 2. |
| Check | Plug | J9 | on | Status | |||||
|
| panel is configured properly |
|
| Board and J8 on Control | ||||||||
|
| for | input | voltage being |
|
| Board for loose or faulty | ||||||
|
| applied to |
|
|
|
| connections |
|
|
| |||
|
|
|
|
|
| 3. | Test for 24 VAC between | ||||||
|
|
|
|
|
|
|
| leads C2 and H6 (plug J7) | |||||
|
|
|
|
|
|
|
| on Control Board. Refer to | |||||
|
|
|
|
|
|
|
| wiring diagram. |
|
| |||
|
|
|
|
|
|
|
| a. If the 24 VAC IS NOT | |||||
|
|
|
|
|
|
|
| present or voltage is very | |||||
|
|
|
|
|
|
|
| low, the | main transformer | ||||
|
|
|
|
|
|
|
| could | be | faulty. | Perform | ||
|
|
|
|
|
|
|
| Main Transformer Test. | |||||
|
|
|
|
|
|
|
| b. If the 24 VAC is | |||||
|
|
|
|
|
|
|
| present at leads C2 to H6, | |||||
|
|
|
|
|
|
|
| the Control Board could be | |||||
|
|
|
|
|
|
|
| faulty. Replace. |
|
| |||
|
|
|
|
|
|
|
|
| |||||
The "MACHINE ON" LED is lit | 1. Push the "SAFETY RESET" | 1. |
| The | torch | and | cable | ||||||
and the "SAFETY" LED is lit. | button, the LED should go |
|
| assembly | may | be | faulty. | ||||||
|
| out. | This circuit sometimes |
|
| Perform Torch, Torch Cable | |||||||
|
| trips on power up or because |
|
| Assembly, | and | Internal | ||||||
|
| of "noise". | If the circuit can |
|
| Trigger and | Safety | Circuit | |||||
|
| be reset, it is OK to continue. |
|
| Tests. |
|
|
|
|
| |||
|
| 2. Maintain proper | 2. | Check | for continuity (zero | ||||||||
|
|
|
| ohms) between leads #336 | |||||||||
|
| while cutting (.10” to .15”). |
|
| and #337 from | the | torch | ||||||
|
| Too long a |
|
| |||||||||
|
| cause nuisance safety trips. |
|
| machine to plug J5 on the | ||||||||
|
| 3. Check torch | consumables. |
|
| Control Board. | Refer to | ||||||
|
|
|
| wiring diagram. |
|
| |||||||
|
| Replace if needed. | 3. |
| Check | Pilot | bleed resistor | ||||||
|
| 4. Replace the torch and cable |
|
| R3. Normal is 40 ohms. | ||||||||
|
|
|
| See wiring diagram. |
| ||||||||
|
| assembly. |
|
| 4. | The control board could be | |||||||
|
|
|
|
|
|
|
| faulty. Replace. |
|
| |||
|
|
|
|
|
| 5. |
| Perform Main Transformer | |||||
|
|
|
|
|
|
|
| Test. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| 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
