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TROUBLESHOOTING & REPAIR | |||
Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE | |
detailed in the beginning of this manual. |
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | |
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | |
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| LED FUNCTION PROBLEMS |
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The Air Low LED is lit. | 1. Make sure there is at least 70 | 1. | The pressure switch (S5) or |
| psi (448 kPa) of air pressure |
| associated leads may be faulty. |
| connected to the gas connec- |
| See the Wiring Diagram. |
| tion at the back of the | 2. | The control board may be faulty. |
| 55. | ||
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| Replace. | |
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| 2. Press the purge button and set |
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| the regulator to 70 psi (448 |
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| kPa). Do not reset the air pres- |
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| sure while the air is off (not flow- |
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| ing). |
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The Safety LED is flashing. | 1. Make sure there is a Lincoln | 1. | Perform the Torch Continuity |
| PCT 80 torch connected prop- |
| and Solenoid Test. |
| erly to the | 2. | Check leads “N”, “E”, #364, |
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| 2. Make sure the torch consum- |
| and #369 between the torch |
| ables are in place and in good |
| receptacle and the output |
| condition. |
| board. See the Wiring Diagram. |
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| 3. | The output board may be faulty. |
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| Replace. |
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The Safety LED is lit and ready. | 1. Press the reset button. If the | 1. | The reset button or associated |
| torch and consumables are |
| wiring may be faulty. See the |
| properly installed, the Safety |
| Wiring Diagram. |
| LED should turn off. | 2. | Perform the Torch Continuity |
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| and Solenoid Test. |
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| 3. | The control board may be faulty. |
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| Replace. |
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| 4. | If the machine operates normal- |
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| ly with the Safety LED on, the |
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| display board may be faulty. |
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| Replace. |
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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
