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TROUBLESHOOTING AND REPAIR |
POWER FEED
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION |
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FUNCTION PROBLEMS (Continued) | ||
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The Dual Procedure is not func- | 1. Check the leads and plug J5 | 1. The local dual procedure switch |
tioning when using the local Dual | between the switch and the | may be faulty. |
Procedure switch on the Control | Control Box control board for |
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Box. The STATUS LEDs are | loose or faulty connections. | Remove power to the machine. |
steady green on the power source, | See wiring diagram. | Disconnect plug J5 from the |
Control Box and wire drive units. |
| Control Box control board. |
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| Check for continuity (less than |
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| one ohm) between pins 1 and 7 |
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| when the Dual Procedure switch |
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| is in position “A”. Next check for |
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| continuity (less than one ohm) |
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| between pins 1 and 8 when the |
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| Dual Procedure switch is in the |
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| “B” position. If either of these |
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| continuity tests fail, replace the |
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| switch. When the switch is in |
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| the center position, there should |
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| not be any continuity between |
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| pins. |
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| 2. The Control Box control board |
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| may be faulty. |
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The wire feed speed is consistent | 1. The DIP switch on the wire drive | 1. The wire drive control board |
and adjustable, but runs at the | unit may not be set for the cor- | may be faulty. |
wrong speed. | rect gear ratio. See the Instal- |
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| lation section of this manual. |
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The unit shuts off while welding or | 1. The shut down circuit in the | 1. Disconnect any shutdown |
attempting to weld. The STATUS | wire drive unit may be electrical- | device from leads #570 and |
LED is alternating between red and | ly “open”. Make sure leads | #571 (0.25 in. insulated tab ter- |
green every second. The unit tries | #570 and #571 are connected | minals). Connect leads #570 |
to recover after 30 seconds and | together. | and #571 together. If the feeder |
may repeat sequence. |
| STATUS LED is now steady |
| 2. The drive motor may be over | green, the problem is in the |
| loaded due to a mechanial | external shutdown circuit. |
| restriction in the wire feeding |
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| path. See Operation section of | 2. If there are no restrictions in the |
| this manual. | wire feeding path, the drive |
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| motor or gear box may be faulty. |
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| 3. The wire drive control board |
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| may be faulty. |
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CAUTION
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
