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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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The machine beeps without the | If the water cooler is enabled and | 1. | Perform the Auxiliary |
keys being pressed. | the flow switch inside the water |
| Transformer #2 Test. |
| cooler opens (due to inadequate | 2. The water cooler may be | |
| coolant flow rate), the machine | ||
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| defective. Replace. | |
| indicates this by beeping. This |
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| happens regardless of the overlay | 3. | Check the continuity of lead |
| placed on the machine. In this |
| #453, 454, 455 & 456 from |
| case, do the following. |
| plug J3 to J11. See wiring dia- |
| 1. Turn the machine off and on a |
| gram. |
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| couple of times and see if the | 4. | The display board may be |
| beeping continues. If the flow |
| faulty. Replace. |
| rate dropped momentarily, then |
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| turning the machine off and on |
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| eliminates the beeping. A |
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| momentary drop in flow rate |
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| could be due to a temporary |
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| restriction in the water cooler |
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| hose. |
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| 2. Check the water cooler and |
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| accessory hoses for kinks, |
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| internal obstructions or block- |
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| age, or ruptures. If such prob- |
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| lems were found then correct |
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| them. Turn the machine Off |
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| and On to check if the beeping |
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| has been eliminated. |
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| 3. Check the water cooler fluid |
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| level. Low coolant level could |
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| cause the flow rate to drop. |
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| 4. Prime the water cooler. Refer |
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| to the Setup Overlay section |
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| of this manual for instructions. |
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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 1-
