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| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual |
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| PROBLEMS |
| POSSIBLE AREAS OF |
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| (SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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| Major physical or electrical damage | 1. Contact your local authorized |
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| is evident when the sheet metal |
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| Lincoln Electric Field Service |
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| covers are removed. |
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| facility for technical assistance. |
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| Input fuses keep blowing, or input |
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| 1. Make certain that fuses or |
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| breaker keeps tripping. |
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| breakers are properly sized. |
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| See Installation section of this |
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| manual for recommended |
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| fuse and breaker sizes. |
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| 2. Welding procedure is drawing |
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| too much output current, or |
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| duty cycle is too high. |
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| Reduce output current, duty |
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| cycle, or both. |
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| 3. There is internal damage to |
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| the power source. Contact an |
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| authorized Lincoln Electric |
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| Service facility. |
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| Machine will not power up (no |
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| 1. Make certain that the Power |
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| lights, no fan, etc.) |
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| Switch (SW1) is in the “ON” |
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| position. |
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| 2. Circuit breaker CB4 (in recon- |
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| nect area) may have opened. |
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| If all recommended possible areas |
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| Reset. Also, check input volt- |
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| of misadjustments have been |
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| age selection, below. |
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| checked and the problem persists, |
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| 3. Input voltage selection made |
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| contact your local Lincoln |
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| improperly. | Power down, |
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| Authorized Field Service Facility. |
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| check input voltage reconnect |
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| according to | diagram on |
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| reconnect cover. |
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| Thermal LED is lit. |
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| 1. Fan thermostat has opened. |
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| Check for proper fan opera- |
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| tion. (Fan should run whenev- |
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| er output power is on.) Check |
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| for material blocking intake or |
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| exhaust louvers, or for exces- |
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| sive dirt clogging cooling chan- |
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| nels in machine. |
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| 2. Secondary rectifier or Choke |
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| thermostat has opened. After |
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| machine has cooled, reduce |
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| load, duty cycle, or both. |
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| Check for material blocking |
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| intake or exhaust louvers. |
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| 3. DC Bus PC board thermostat |
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| has opened check for exces- |
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| sive load on 40VDC supply. |
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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, con- tact your local authorized Lincoln Electric Field Service Facility for technical assistance.