Operation
Symptom | Possible Cause | Possible Solution | ||
Suction CFM is | 1. | Blast gate is leaking or is not completely | 1. | Make sure appropriate blast gate(s) are completely |
lower than normal. |
| open. |
| open and do not leak. |
| 2. | Door or cabinet is at fault. | 2. | Make sure that all doors are closed seals do not |
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| leak. |
| 3. | Ducting is at fault. | 3. | Reduce length of ducting; maintain 6" diameter |
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| ducting; eliminate as many bends as possible; |
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| move downdraft table closer to fume extractor. |
| 4. | Slag screen is at fault. | 4. | Remove slag drawer and clean slag screen. |
| 5. | Rolling filter is at fault. | 5. | Increase |
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| new filter paper more often to maintain CFM. |
| 6. | Vibrating filter is at fault. | 6. | Manually clean the vibrating filter or replace. |
| 7. | HEPA filter is at fault. | 7. | Manually clean the HEPA filter or replace. |
| 8. | Fan system is at fault. | 8. | Fan motor has lost RPM, adjust/troubleshoot |
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| frequency drive and replace motor or frequency |
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| drive if required. |
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Filter warning lamp/ | 1. | Infrared sensor is at fault. | 1. | Replace infrared sensor. |
buzzer engages but | 2. | Circuit board is at fault. | 2. | Replace circuit board. |
filter paper has not |
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run out. |
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High | 1. | Incorrect machine usage. | 1. | Eliminate idle time. Do not let machine run between |
usage. |
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| welding jobs, shift changes, or breaks. |
| 2. | Rolling filter advance timing at fault. | 2. | Clean all filters. Delay |
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| and/or decrease amount of new filter that is |
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| exposed during advance cycles. |
| 3. | Workpiece is not properly prepared. | 3. | Reduce smoke and fumes. Grind, scrape, strip or |
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| sandblast away workpiece coatings to a minimum |
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| of 4" away from location to be heated. |
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G0648 Welding Fume Extractor |
