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|
| 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 |
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| FUNCTION PROBLEMS |
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The Thermal Protection Light is on | 1. Check for obstructions that | 1. The fan motor could be faulty. |
but the fan does not run. | could prevent the fan from turn- | Check or replace. |
| ing. | 2. The Thermal Fan/Snubber PC |
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| |
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| Board may be defective. See |
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| the Thermal Fan/Snubber PC |
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| Board LED Chart. |
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The fan runs continuously. | 1. Note: The fan is thermal con- | 1. The Thermal Fan Thermistor |
| trolled. Under normal condi- | may be faulty. See the Wiring |
| tions, it does not continuously | Diagram. |
| run. | 2. The Thermal Fan/Snubber PC |
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| |
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| Board may be defective. See |
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| the Thermal Fan/Snubber PC |
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| Board LED Chart. |
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One or both of the optional digital | 1. Check for loose plugs P13 and | 1. The digital meter board may not |
meters are not lit. | P12 at the digital meter PC | be receiving voltages from the |
| board. | T1 transformer windings. |
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| Perform the Main Transformer |
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| Test. |
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| 2. Check the wiring between Plug |
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| J13 and the associated leads at |
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| the main transformer. See the |
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| Wiring Diagram. |
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| 3. The digital meter PC board may |
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| be faulty. |
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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