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| TROUBLESHOOTING & REPAIR |
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| TROUBLESHOOTING GUIDE | Observe Safety Guidelines | |
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| detailed in the beginning of this manual. | |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | ||
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | ||
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| FUNCTION PROBLEMS |
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1. In Stick mode the machine | 1. | If the machine is in the Remote | 1. | If the machine works properly |
welds at a very low output, |
| control mode, make sure a |
| in Local control mode but not |
regardless of the peak current |
| Lincoln remote control device |
| in Remote mode, perform the |
control setting. |
| is connected to the amphenol. |
| Protection Board Test. |
| 2. | The Start Current may be set | 2. | If the machine operates prop- |
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| too low for the electrode size |
| erly in TIG mode but not in |
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| being used. |
| Stick mode, the control board |
| 3. If the machine works properly |
| may be faulty. Replace. | |
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| in Local control mode, check | 3. | If the output is low in all |
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| or replace the remote control |
| modes, perform the SCR |
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| device. |
| Bridge Test. |
| 4. | If the machine works properly | 4. | The power board may be |
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| in TIG mode, contact your |
| faulty. Replace. |
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| local authorized Lincoln | 5. | The control board may be |
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| Electric Field Service Facility. | ||
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| faulty. Replace. | |
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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, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
SQUARE WAVE TIG 355
