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TROUBLESHOOTING AND REPAIR |
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Observe Safety Guidelines 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 purge switch does not activate | 1. Make certain the COLD | 1. If the COLD INCH/GAS PURGE | |||
the gas solenoid, but gun trigger | INCH/GAS PURGE switch is | switch is operating correctly and | |||
closure in the MIG or pulse modes | operating properly. | the associated leeds are OK. | |||
does activate the solenoid. The | 2. Check for loose or faulty leeds | The feedhead board may be | |||
LEDs are steady green on the | between COLD INCH/GAS | faulty. |
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power source, | and wire drive unit. | PURGE switch and the feedhead |
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| board. See wiring diagram. |
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The COLD INCH/GAS PURGE | 1. Make certain the COLD | 1. If the COLD INCH/GAS PURGE | |||
switch does not turn on the wire | INCH/GAS PURGE switch is | switch is operating correctly and | |||
drive motor but gun trigger closure | operating properly. | the associated leads are OK. | |||
in the MIG or Pulse modes does | 2. Check for loose or faulty leeds | The feedhead board may be | |||
activate the wire drive motor. | between the COLD INCH/GAS | faulty. |
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The LEDs are steady green on the | PURGE switch and the feedhead |
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power source, and wire drive unit. | board. See wiring diagram. |
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The voltmeter on the wire feeder | 1. Make sure the DIP switches are | 1. Check leads #513 and #514 from | |||
does not function properly even | configured correctly for the weld- | J85 on the feedhead board to the | |||
though the STATUS LEDS are | ing polarity being used. See | voltage sense PC board. Verify | |||
steady green. |
| Setting Dip Switches in the Wire | placement in proper cavities. | ||
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| Drive in the Installation section | 2. Perform the | Voltage | Sense |
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| of this manual. | Board Test. |
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| 2. Check the #67 lead on the wire | 3. The display board may be faulty. | ||
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| drive unit. Make sure it is connect- | |||
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| ed to the motor gear box and also | 4. The feedhead control board may | ||
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| the voltage sense PC board. | be faulty. |
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| 3.Check the work sensing leads on | 5. The Control | Box control | board |
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| the POWER FEED® 25M power | may be faulty. |
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| source. Check leads #202 (Neg. |
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| output terminal) and #206 (pos. |
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| output terminal). See POWER |
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| FEED® 25M wiring diagram. If |
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| external voltage sensing is utilized, |
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| Check the #21 lead between the 4- |
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| pin receptacle on the front of the |
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| POWERWAVE® and the work- |
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| place. |
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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