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| TROUBLESHOOTING AND REPAIR | ||||||
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| Observe all Safety Guidelines detailed throughout 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 (Continued) |
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The circuit breaker (5 amp) | 1. | Check or replace the gun trigger | 1. | Perform the Trigger |
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repeatedly trips when the gun trig- |
| and leads. Make sure the trigger |
| Transformer Test. |
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ger is activated. |
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| leads are not shorted to the elec- |
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| trode or work cables. | 2. | Perform the Drive Motor Test. | |
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| 2. | Disconnect any accessory that | 3. | Remove the molex plug from the | |
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| may be connected to terminals |
| relay board. If the circuit breaker | |
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| #7 and #32A. See wiring dia- |
| continues to trip, the control |
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| gram. If the problem is resolved, |
| board may be faulty. If the cir- |
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| the accessory may be faulty. |
| cuit breaker does not trip, the |
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| relay board may be faulty. |
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The circuit breaker (5 amp) trips | 1. | Disconnect any kits or acces- | 1. | Check the wiring harness leads | |||
when power is applied to the |
| sories that may be incorporated |
| #32, #32A, #31, and #531 for |
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Gun trigger is NOT activated. |
| in the |
| shorts or grounds. See wiring |
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| any necessary jumper plugs. If |
| diagram. |
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| problem is resolved the fault may |
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| be in the disconnected kit. | 2. | Perform the Trigger |
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| Transformer Test. |
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| 3. | Remove the molex plug from the | |
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| relay board. If the circuit breaker | |
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| continues to trip, the control |
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| board may be faulty. If the cir- |
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| cuit breaker does not trip, the |
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| relay board may be faulty. |
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| 4. | Perform the Drive Motor Test. | |
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The 1/2 amp fuse on the relay | 1. | Check to make sure the correct | 1. | Perform the Drive Motor Test. | |||
board repeatedly fails. |
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| input voltage (115VAC) is being |
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| applied to the | 2. | Perform the Trigger |
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| Transformer Test. |
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| 2. Very rapid and repetitive gun |
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| triggering can possibly cause the | 2. | The relay board may be faulty. |
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| field fuse to fail. |
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The drive motor thermostat “opens” | 1. | Check for mechanical restric- | 1. | Perform the Drive Motor Test. | |||
while welding. |
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| tions in the wire feeding path. |
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| This condition could cause the |
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| motor to overheat. |
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| 2. The electrode may be rusty or |
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| dirty. Clean or replace. |
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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
