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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE | |||
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 | potentiometer | 1. The output control switch (SW3) | 1. The output control potentiome- | ||
does not function when the output | may be defective. | ter or associated wiring may be | |||
control switch (SW3) is in the |
| faulty. See the Wiring Diagram. | |||
“Local” position. | The |
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operates normally when controlled |
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remotely. |
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The remote output control unit | 1. The remote control unit or con- | 1. The output control switch (SW3) | |||
does not function properly when | necting cable may be defective. | may be | defective. | Check or | |
the output control switch (SW3) is | Check or replace. | replace. | See | the Wiring | |
in the “Remote” position. The DC- |
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655 operates normally when con- |
| 2. Check the remote control leads | |||
trolled locally from the machine’s |
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| #75, #76 and #77 at plug P15, | ||||
output control potentiometer. |
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| the terminal strip and the | ||||
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| MS type connector. Check for | ||
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| loose or | faulty connections. | |
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| See the Wiring Diagram. | ||
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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