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TROUBLESHOOTING & REPAIR |
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TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | |
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| detailed in the beginning of this manual. | |||
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | ||||
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | ||||
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| OUTPUT PROBLEMS |
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The meters light, but the input con- | 1. Make sure the input voltage | 1. | Check leads 330 and 303A for | |||
tactor does not activate when the | applied to the |
| loose or faulty connections. | |||
ON/OFF Mode Selector switch is | not greater than 113VDC. |
| See the Wiring Diagram. | |||
turned on. The |
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| 2. | Perform the Input Contactor | |
does not have output. |
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| Coil Resistance and Supply | ||
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| Voltage Test. | |
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| 3. | The Peripheral Board may be | |
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| faulty. | |
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| 4. | The Weld Control Board may be | |
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| faulty. | |
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The Thermal Light is on. The Multi- | 1. The output rating of the | 1. | The Thermostat, located on the | |||
Weld 350 does not have output. | machine | may be | exceeded. |
| input diode heat sink, may be | |
The fan operates normally. | See | the | Technical |
| faulty. | |
| Specifications. |
| 2. | Check leads 306, 307, 206, 207 | ||
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| 2. Wait until the machine cools and |
| and plugs J22 and J11 for loose | |||
| the Thermal Light goes out. The |
| or faulty connections. See the | |||
| machineís output | should be |
| Wiring Diagram. | ||
| restored. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
