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| TROUBLESHOOTING & REPAIR |
| |
| TROUBLESHOOTING GUIDE | Observe Safety Guidelines | |
|
| detailed in the beginning of this manual. | |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION |
|
|
|
| ENGINE PROBLEMS |
|
Engine will not go to high idle when | 1. Make sure the welding cables | 1. Check for broken or faulty con- |
attempting to weld. Welding out- | and connections are tight. | nections in the sensing leads |
put is normal when Idler switch is |
| (#254 and #254A, #241 for CV |
in “HIGH” position. Automatic idle |
| mode). Make sure their con- |
function works properly when the |
| nections are tight at the work |
auxiliary power is loaded. |
| output terminal, Polarity mode |
|
| switch, and CV output contac- |
|
| tor. See Wiring Diagram. |
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| 2. Make sure leads #254 and |
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| #254A are looped three times |
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| through the current sensor on |
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| the control board. For CV oper- |
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| ation, make sure leads #240, |
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| #241, and #242 have continuity |
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| (zero ohms) from their connec- |
|
| tion points to the control board |
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| plug J2. See Wiring Diagram. |
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| 3. If the automatic idle function |
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| works correctly in the constant |
|
| current (CC) mode but NOT in |
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| the constant voltage (CV) |
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| mode, the control board may |
|
| be 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
RANGER
