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TROUBLESHOOTING & REPAIR | ||||||
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 |
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| (SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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Fan runs - No output from machine 1. | The welding application may | 1. | One of the thermostats may be | |||
in either Stick or TIG modes and the | have exceeded the recommend- |
| faulty. Check or replace. See |
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yellow light on the control panel is | ed duty cycle. Allow the unit to |
| wiring diagram. |
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on. |
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| run until the fan cools the unit |
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| and the yellow light goes out. | 2. | Check for loose or faulty wires on | |
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| the thermostats and associated | |
| 2. | The air louvers may be blocked. |
| circuitry. See wiring diagram. |
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| Remove air obstruction and allow |
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| unit to cool. |
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The machine does not respond (no | 1. | Make certain the machine is in | 1. | Check the continuity (zero ohms) |
gas flow, no high frequency and no |
| the TIG mode. |
| of the leads between the remote |
open circuit voltage) when the arc |
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| receptacle and plug J5 on the |
start switch or Amptrol is activated - | 2. | The Amptrol may be defective. |
| control board. See wiring dia- |
fan is working normally. |
| Check for continuity(zero ohms) |
| gram. |
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| between pins "D" and "E" on |
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| cable connector when the | 2. | Perform the T1 Transformer |
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| Amptrol is depressed. |
| Test. |
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| 3. | The control board may be faulty. |
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| Replace. |
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call