| TROUBLESHOOTING | |||
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| Observe all Safety Guidelines detailed throughout this manual | |||
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| PROBLEMS | POSSIBLE | RECOMMENDED |
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| (SYMPTOMS) | CAUSE | COURSE OF ACTION |
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PRESET & OUTPUT CONTROL PROBLEMS
Meter does not display preset | 1. Faulty potentiometer R1 or its con- | ||
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| 2. | Bad connection at P9 of Control |
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| PC board |
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| 3. | Faulty Advanced Control PC board |
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| ( if present ) or its connection to |
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| the main Control PC board |
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| 4. | Missing plug P3 on Control board |
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| or bad connection at P3 when an |
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| Advanced Control PC board is not |
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| present |
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High output current in both DC & AC | 1. | Bad connection at P6 of Control | |
polarities regardless of preset |
| PC board | |
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| 2. | Bad shunt connection |
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| 3. | Faulty Control PC board |
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| 4. | Faulty SCR bridge |
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High output current in DC polarity | 1. | Shorted free wheeling diode D1 | |
regardless of preset, o.k. in AC polar- |
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ity |
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In | 1. | Bad 2/4 step switch or its connec- | |
more than downslope time after trig- |
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ger open (machine with Advanced |
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Control panel only) | 2. | Bad connection at P1 of Advanced | |
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| Control PC board |
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Output stays on after releasing | 1. | Downslope is not set at min. | |
hand/foot | Amptrol (machine with |
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Advanced | Control panel only) | 2. | Bad Downslope potentiometer |
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| R12 or its connection |
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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.
