Panasonic PT-TMZ400 Operating Instructions Manual page 139

f Make sure that the projector is stable, and perform the maintenance in a safe place even if the air filter unit falls accidentally.
Note
f The replacement cycle of the air filter unit varies greatly depending on the usage environment.
How to replace the air filter unit
1) Remove the air filter unit.
f Refer to "Removing the air filter unit" (x page 137).
2) Install the optional Replacement Filter Unit (Model No.: ET-RFL400) to the projector.
f Refer to "Attaching the air filter unit" (x page 138).
3) Reset the air filter counter.
f Refer to "Resetting the air filter counter" (x page 138).
Attention
f When switching on the projector, make sure that the air filter unit is attached. If it is not attached, the projector will suck in dirt and dust
causing a malfunction.
f If the projector is used without resetting the filter counter, the actual filter usage time (counter numeric value) will not be able to be
confirmed.
Chapter 6 Maintenance - Maintenance/replacement
ENGLISH - 139