29GDED-IOM-215-ACause: Cartridge won’t clean through pulsingSolution: Cartridges have a finite life. Eventually the dust can become deeply embeddedor adhere to the media so that even the most vigorous pulsing will not recoveran acceptable permeability. Replace with a new set of AAF cartridges.13.2 Visible Discharge (emission to atmosphere)Issue: Damaged cartridges / damaged gasketsSolution: Check gaskets on the cartridge and door to ensure good condition and no leakpoints. Check cartridge media for holes or damage for possible paths of bypass.Perform a leak test with dye if needed.Issue: Air/dust bypass through filter access door.Solution: Ensure filter access door knob is tightened fully and the gasket appears to beair tight. Perform a “paper test” by trying to slide a piece of paper between thegasket and unit surface. If a piece of paper can easily fit, air and dust willescape. Tighten the knob as necessary.Issue: Non-standard cartridges fittedSolution: Replace with AAF supplied replacement cartridgesIssue: Over-temperature excursion has occurredSolution: Investigate damage to cartridges and gaskets and replace as necessary.Investigate cause and consider replacement AAF cartridges with a highertemperature rating13.3 Insufficient ExtractionIssue: Fan ProblemsSolution: Consult Fan IOMIssue: Duct / damper problemsSolution: Consult system supplierIssue: High pressure differential at OptiFloSolution: See section 13.113.4 Other ProblemsIssue: Dust build up in hoppers