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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 |
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| POSSIBLE AREAS OF |
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(SYMPTOMS) |
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| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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The "THERMAL" LED is lit. | 1. | The machine may be over- | 1. |
| The | normally |
| closed | |||||||||||
The | "MALFUNCTION" |
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| heated. | This condition may |
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| primary thermostat |
| could | ||||||||
"FAULT" LED is blinking. | The |
| be due to not enough ventila- |
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| be faulty. Replace. | See | ||||||||||||
machine has no output. |
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| tion. | Make certain that | the |
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| wiring diagram. |
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| machine's | air intakes | and | 2. |
| Check | leads | #321 | and | ||||||
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| exhaust | louvers | are | not |
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| #322 for loose or faulty con- | ||||||||
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| blocked | or | restricted. Allow |
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| nections at plug J8 on the | |||||||||
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| machine to cool. |
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| Control Board. |
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| 2. | The | machine's | duty | cycle | 3. |
| If no loose or faulty wiring is | ||||||||
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| may | have | been | exceeded. |
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| found, | the Control | Board | ||||||
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| Allow machine to cool and |
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| could be faulty. Replace. | |||||||||||
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| modify cutting process. |
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The | "MALFUNCTION" |
| or | 1. | Check the torch consumables | 1. |
| The | torch | and |
| cable | |||||||
"FAULT" LED is lit. | The |
| to see if they are melted |
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| assembly | could | be |
| faulty. | |||||||||
machine has no output. |
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| together or are touching each |
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| Perform | the Torch, |
| Torch | |||||||||
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| other. Clean or replace. |
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| Cable |
| Assembly, |
| and | ||||||
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| 2. | Turn the machine off and on |
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| Internal Trigger and Safety | |||||||||||
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| Circuit Tests. |
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| again. If the "FAULT" LED will | 2. |
| The Power Board could be | |||||||||||
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| not stay off when you try to |
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| faulty. |
| Perform | Power | ||||||||
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| cut there is a failure within the |
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| Board Test. |
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| machine. | THE | MACHINE | 3. |
| Perform Transistor Module | |||||||||
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| SHOULD NOT BE LEFT ON. |
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| Test. |
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| 3. | Replace the torch and cable | 4. |
| The Control Board could be | |||||||||||
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| faulty. Replace. |
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| assembly. |
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| 5. |
| Perform Main Transformer | ||||||||
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| Test. |
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When the torch trigger is pulled | 1. | Check Torch Consumables. | 1. |
| The | Transistor | Module | ||||||||||||
the "OUTPUT ON" LED lights | 2. | Check for proper Air Pres- |
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| could | be | faulty. | Perform | |||||||||||
for a very short period of time. |
| sure. |
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| the Transistor Module Test. | |||||||||
The pilot arc is unusually bright | 3. | Check work cables and |
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| If the transistor module is | |||||||||||||
but the cutting arc does not |
| connections. |
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| faulty, | replace | the | Power | |||||||||
transfer to the work. |
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| 4. | Clean any painted or heavily |
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| Board also. |
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| corroded work surfaces. |
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| 5. | If no malfunction or fault indi- |
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| cators are lit, then contact |
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| your local Lincoln Authorized |
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| Field Service Facility. |
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| CAUTION |
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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
