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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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| FUNCTION PROBLEMS |
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The output control on the |
| 1. Make sure the Remote/Local | 1. | Check the Remote/Local switch | |||||
Commander 300 does not work |
| switch is in the “Local” position. |
| and associated wiring. See the | |||||
properly. |
| 2. The output control (R1) may be |
| Wiring Diagram. (leads | #75, |
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| #76 and #77) |
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| 2. | Perform | the | Power | Supply | ||
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| Test. |
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| 3. | Perform | the | Control | Input | ||
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| Test. |
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| 4. | Perform | the | Feedback | Input | ||
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| Test. |
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| 5. | Perform the PWM Output Test. | |||||
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| 6. | Perform | the | Power | Module | ||
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| Test. |
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The remote output control does not |
| 1. Make sure the Remote/Local | 1. | Check the Remote/Local switch | |||||
function properly. |
| switch is in the “Remote” posi- |
| and associated leads. See the | |||||
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| Wiring Diagram. |
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| 2. The remote control unit may be | 2. | Check | the | amphenols | and | ||
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| faulty. Repair or replace. |
| associated leads. | See the | ||||
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| Wiring Diagram. |
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| 3. | Perform the RF Bypass Board | |||||
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| Resistance Test. |
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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, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
