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| 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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| Motor does not start. | 1. | Ensure 115 VAC input power is |
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| available. |
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| 2. | Circuit breaker tripped. Reset cir- |
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| cuit breaker (See Electrical |
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| Maintenance). |
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| 3. Carbon brushes worn. Check |
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| brushes, replace if necessary. |
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| Motor stops automatically. | 1. | Thermal protection is activated. |
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| Check that the cooling underneath |
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| the top cover and/or the outlet are |
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| not obstructed. |
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| Poor suction. | 1. | Leakage. Check hose connections, | If all recommended possible areas |
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| hose integrity. |
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| of misadjustment have been |
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| 2. | Filter dirty. Replace both LongLife- | checked and the problem persists, |
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| H™ Filter and HEPA filter. | Contact your | local | Lincoln |
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| Authorized | Field | Service |
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| 3. | Facility. |
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| replace or clean using an industrial |
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| vacuum cleaner. Use caution and |
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| proper personal protection equip- |
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| ment when cleaning |
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| 4. | Improper application. Check hose |
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| diameter and maximum length 24 |
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| ft. (7.5 m), check filter for oily con- |
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| ditions. |
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| 5. | Brushes worn in one of the motors. |
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| Replace brushes in both motors. |
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| Unit will not sense current. | 1. | Welding current too low. Loop |
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| cable two or three times on current |
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| sensor. |
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| 2. | Current sensor or PC board dam- |
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| aged. Replace sensor or PC |
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| board. |
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| Unit automatically cycles between | 1. | Check connections from PC board |
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| low and high speeds. |
| to motors. |
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| 2. | Control panel/PC board damaged. |
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| Replace control panel and PC |
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| board. |
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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 your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
MINIFLEX
