Ricoh PJ WX3231N User Manual

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The air filter prevents dust and debris from getting inside the projector. Never run the pro-
jector with the filter removed. It is recommended that you clean the air filter regularly.
•  The message “

Check the air filter for dirt.” is displayed every 100 hours. (Once the 

usage time exceeds 100 hours, the message is displayed for about 30 seconds the first 
time the power is turned on and an image is displayed. The message will disappear with 
any operation.)

•  Check the filter and if any debris is found, use the following cleaning procedure.

• 

Request cleaning and maintenance of a ceiling-mounted unit from your sales 
representative. 
Attempting to clean or replace the filter in a high location by yourself may cause you 
to fall, resulting in injury.

Pull out the air filter by holding the release knob 
with your fingers as shown in the figure.

Carefully remove the dust and dirt from the air filter 
with a vacuum cleaner or the like.

Insert the air filter firmly until you hear a click.

•  When dirt and dust build up in the air filter, the air circulation inside the projector is 

affected and the internal temperature will rise, causing the projector to stop working or 
malfunction.

•  Push the air filter fully in. If the projector is used with the air filter only partially inserted, 

dust and dirt will enter the interior and this could cause the projector to stop working or 
break down.

•  If you wash the air filer with water, make sure you dry it thoroughly before replacing it.
•  If the air filter becomes damaged, replace it. Contact your sales representative for a new 

filter. If you continue to use the projector when its filter is damaged, dust and dirt will enter 
the interior and this could cause the projector to stop working or break down.