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TROUBLESHOOTING & REPAIR |
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TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | ||||||
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| detailed in the beginning of this manual. | |||||||
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PROBLEMS |
| POSSIBLE AREAS OF |
| RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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The air begins to flow, the | 1. Check the torch consum- | 1. If | the |
| high | frequency | ||||||
"OUTPUT ON" LED lights for a | ables to be sure they are | "spark" is present at the | ||||||||||
short time, but no pilot arc is | installed securely. | Make | spark gap located inside the | |||||||||
established. The high frequen- | sure they | are not | dirty or | panel, the torch and cable | ||||||||
cy arc does NOT appear | greasy and are in good con- | assembly | may | be | faulty. | |||||||
across the torch tip. |
| dition. Replace the consum- | Perform | the | Torch, | Torch | ||||||
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| ables if necessary. |
| Cable |
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| Assembly, | and | ||||
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| 2. Check for | the presence of | Internal | Trigger | and | Safety | |||||
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| Circuit Tests. |
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| high frequency at the spark |
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| gap, located inside the Right | 2. If | the |
| high | frequency | |||||
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| Case Side Assembly panel | "spark" is not present at the | |||||||||
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| of the machine. The “spark” | spark gap, check that pilot | |||||||||
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| normally will be present for | control relay (CR2) contacts | |||||||||
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| a second or two when the | close when the torch trigger | |||||||||
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| torch trigger is pulled. | is pulled. |
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| 3. Check the high frequency | a. | If |
| pilot | control | relay | ||||
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| (CR2) | contacts | close | when | |||||||
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| spark gap setting. It should | torch trigger is pulled, per- | |||||||||
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| be at .060” (1.5mm). DIS- | form |
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| High | Voltage | |||||
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| CONNECT | ALL | INPUT | Transformer Test. |
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| POWER BEFORE ADJUST- | b. If pilot control relay | |||||||||
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| ING THE HIGH FREQUEN- | (CR2) |
| contacts | DO | NOT | |||||
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| CY CIRCUIT. |
| close, test for 115 VAC | ||||||||
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| 4. If the high frequency “spark” | between leads #36 and #31 | |||||||||
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| on pilot control relay (CR2) | ||||||||||
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| is present at the spark gap | when the torch trigger is | |||||||||
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| located inside the panel, the | pulled. | If 115 VAC IS pre- | ||||||||
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| torch and | cable assembly | sent, | pilot | control | relay | |||||
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| may be faulty. |
| (CR2) |
| could | be | faulty. | ||||
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| Replace. |
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| If 115 VAC IS NOT pre- | |||||||
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| sent, check plug J10 on | |||||||
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| Control Board and asso- | |||||||
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| ciated wires for loose or | |||||||
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| faulty | connections. If none | ||||||
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| are | found, | Control | Board | ||||
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| could be faulty. Replace. | |||||||
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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