Epson L-4533A/L-4533AW/L-4033A/L-4033AW Maintenance Guide Before Inspections Filter / Maintenance Tank U “Filters” on page 87 U “Maintenance Tank” on page 90 18 Inspection Points No. Inspection Frequency Mode Ceiling Fan Intake Filter 34 Once a week Normal Heater Intake Filter 35 Maintenance Tank 36 Everyday Normal