TROUBLESHOOTING | ||
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| Observe Safety Guidelines detailed in the beginning of this manual. |
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PROBLEMS (SYMPTOMS)
POSSIBLE
CAUSE
OUTPUT PROBLEMS
RECOMMENDED COURSE OF ACTION
| Major physical or electrical damage | 1. | Contact your local Lincoln |
| is evident |
| Authorized Field Service |
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| Facility. |
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| Machine has no open circuit voltage. | 1. | Check the control cable between |
| Wire feeds ok. |
| the feeder and the STT II unit. |
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| Make sure the #2 and #4 leads |
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| are intact. |
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| 2. | Put a jumper wire between Pins |
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| “C” and “D” on the 14 pin MS |
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| connector. If normal open circuit |
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| voltage (85VDC.) is restored |
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| then the problem is in feeder |
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| control cable or the wire feeder. |
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| Machine has no welding output (no | 1. The 42VAC circuit breaker CB1 | |
| open circuit voltage) and the wire | may be tripped. Reset if neces- | |
| feeder does not feed wire when the | sary. | |
| gun trigger is pulled. |
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| 2. Put a jumper between pins “A” | |
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| and “C” on the 5 pin MS connec- | |
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| tor located on the LN742 wire | |
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| feeder. If wire feeds check the | |
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| gun trigger. Repair or replace if | |
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| necessary. | |
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| 3. | Check for the presence of 42AC |
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| at pins “K” and “I” on the 14 pin |
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| MS connector. If the 42VAC is |
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| present and the feeder does not |
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| work the problem is in the feeder |
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| control cable(s) or the wire feed- |
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| er. |
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If all recommended possible areas of misadjustment have been checked and the problem persists,
Contact your local Lincoln Authorized Field Service Facility.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
INVERTEC STT II (CE)