Chapter 6 Maintenance — Maintenance/replacementENGLISH - 199f Hook the air filter unit frame at the bottom side to the tabs on the projector body (d), and perform Step 3) in“Removing the air filter unit” (x page 197) in the reverse order to attach.f Confirm that the tabs on the projector body (c) and (d) are hooked to the air filter unit frame.2) Slide the air filter cover toward the direction of the arrow to close (Fig. 2), and tighten the air filtercover fixing screw using a Phillips screwdriver.f When the air filter unit is attached to the projector, proceed to “Resetting the filter counter” (x page 199)next.Notef Make sure that the air filter unit is properly attached before using the projector. If it is not attached, the projector will suck in dirt and dustcausing a malfunction.f When the projector is used without the air filter unit attached, the filter indicator lights up in red.Resetting the filter counter1) Turn on the power of the projector.2) Press the f The [MAIN MENU] screen is displayed.3) Press as to select [PROJECTOR SETUP].4) Press the button.f The [PROJECTOR SETUP] screen is displayed.5) Press as to select [FILTER SETTING].6) Press the button.f The [FILTER SETTING] screen is displayed.7) Press as to select [FILTER COUNTER RESET], and press the button.8) When the confirmation screen is displayed, press qw to select [OK], and press the button.f The [PROJECTOR SETUP] menu → [STATUS] → [FILTER COUNTER] is displayed as “0”.Notef When the projector is used without resetting the filter counter, the actual filter runtime (counter numeric value) will not be able to beconfirmed.For the Long Life Filter UnitThis section describes the maintenance of the air filter unit when the optional Long Life Filter Unit (Model No.:ET-EMFU330) is attached instead of the standard air filter unit attached to the projector.The Long Life Filter Unit uses two of the same standard air filter units attached to the projector or theReplacement Filter Unit (Model No.: ET-EMF330) (accessory/optional accessory).Removing the air filter unitLong life filter cover fixing screwsFig. 2Fig. 11) Turn off the power of the projector.f When switching off the projector, make sure to follow the procedures in “Switching off the projector”(x page 68).