g0648 Welding Fume Extractor
-35-
Operation
Symptom
possible Cause
possible Solution
Suction CFM is
lower than normal.
1. Blast gate is leaking or is not completely
open.
2. door or cabinet is at fault.
3. ducting is at fault.
4. Slag screen is at fault.
5. rolling filter is at fault.
6. Vibrating filter is at fault.
7. hEpa filter is at fault.
8. Fan system is at fault.
1. Make sure appropriate blast gate(s) are completely
open and do not leak.
2. Make sure that all doors are closed seals do not
leak.
3. reduce length of ducting; maintain 6" diameter
ducting; eliminate as many bends as possible;
move downdraft table closer to fume extractor.
4. remove slag drawer and clean slag screen.
5. increase rolling-filter advance intervals to expose
new filter paper more often to maintain CFM.
6. Manually clean the vibrating filter or replace.
7. Manually clean the hEpa filter or replace.
8. Fan motor has lost rpM, adjust/troubleshoot
frequency drive and replace motor or frequency
drive if required.
Filter warning lamp/
buzzer engages but
filter paper has not
run out.
1. infrared sensor is at fault.
2. Circuit board is at fault.
1. replace infrared sensor.
2. replace circuit board.
high rolling-filter
usage.
1. incorrect machine usage.
2. rolling filter advance timing at fault.
3. Workpiece is not properly prepared.
1. Eliminate idle time. do not let machine run between
welding jobs, shift changes, or breaks.
2. Clean all filters. delay rolling-filter advance timing
and/or decrease amount of new filter that is
exposed during advance cycles.
3. reduce smoke and fumes. grind, scrape, strip or
sandblast away workpiece coatings to a minimum
of 4" away from location to be heated.
