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TROUBLESHOOTING & REPAIR | ||||||||
Observe Safety Guidelines |
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| TROUBLESHOOTING GUIDE | ||
detailed in the beginning of this manual. |
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PROBLEMS | POSSIBLE AREAS OF |
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(SYMPTOMS) | MISADJUSTMENT(S) |
| COURSE OF ACTION | |||||
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| AIR FLOW PROBLEMS |
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The "MACHINE ON" LED is lit | 1. | Check the air supply to the | 1. With 60 PSI applied to the | |||||
but there is no response when |
| machine. | Make sure suffi- |
| machine the air pressure | |||
the torch trigger is pulled. The |
| cient air pressure is supplied |
| switch should be “closed.” | ||||
"AIR PRESSURE" LED does |
| to the | If the |
| Check for continuity (less | |||
not turn on. The fan runs nor- |
| air does not flow, the |
| than 1 ohm) between leads | ||||
mally. The “FAULT” LED |
| machine will not operate. |
| #319 to #323. See wiring | ||||
blinks. | 2. Low air pressure will also |
| diagram. | |||||
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| result in a "no start" condi- | 2. Check the air solenoid | |||||
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| tion. | With | the | machine in |
| (SV1) operation by apply- | |
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| "PURGE" adjust the air reg- |
| ing 115 VAC to the solenoid | ||||
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| ulator to 60 psi (413kPa) |
| leads. | ||||
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| minimum while air is flowing. |
| a. If the solenoid activates | ||||
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| "AIR | PRESSURE" | LED |
| and air flows, the solenoid | ||
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| must be lit when the air is |
| is good. | ||||
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| flowing. |
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| b. If the solenoid does not | |
| 3. | Check | the | operation | of the |
| activate, replace the | |
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| solenoid. | ||||||
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| air solenoid by switching the |
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| machine to "PURGE". If the | 3. Check plug J10 on the | |||||
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| air pressure is sufficient the |
| Control Board for loose or | ||||
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| air should begin to flow and |
| faulty connections. | ||||
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| "AIR | PRESSURE" | LED |
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| should | turn on. | Return to | 4. The Control Board could | |||
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| the "RUN" mode. If air does |
| be faulty. Replace. | ||||
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| not flow when the torch trig- |
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| ger pulled, consult your local |
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| Lincoln Authorized | Field |
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| Service Facility. |
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| 4. Check torch consumables - |
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| replace if necessary. |
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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