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21 41959-01
Air Purifier Maintenance
6. Install the grill back onto the unit. First, line up the tabs on the bottom of the grill
with the openings on the purifier base and then push the top of the grill forward
until it is closed.
7. Plug in the air purifier. NOTE: This unit will not oper-
ate unless the grill is in the correct position. The display
will read “door” if the grill is not attached properly.
8. Finally, reset the pre-filter counter by pressing the
DISPLAY key until the pre-filter counter is displayed.
Then, hold the FILTER RESET key for 2 seconds. The
pre-filter counter will return to zero and resume nor-
mal operation.
Cleaning the Filter
The PermaLife™ Filtration System uses a cleanable filter that never has to be changed, only
cleaned. When the filter exceeds 2800 hours (approximately 4 to 6 months of use), the Filter
Run-Time Counter will display 0% life remaining and the Filter indicator will flash (refer to
Filter Run-Time Counter for additional information, pg. 13). This is a reminder that you
should check the filter and clean if necessary. The proper time to clean the filter depends on
usage and the environment. Use the following list to help determine if the filter should be
cleaned:
• Compare the color of the filter to the color coded chart on the inside of the housing. If the
filter color matches the darkest color on the chart, you should clean the filter.
• If you notice a decrease in air output or an increase in noise at any time during normal
operation, the filter may be clogged. Clean the filter to return to normal operation.
To clean the filter and reset the filter run-time counter:
1. First, turn off and unplug the air purifier.
2. Next, remove the front grill. Place your fingers in the recesses on either side of
the top of the grill and pull firmly.
3. Gently pull on the filter to remove it from the unit. While removing the filter,
note the directional arrows printed on the top of the filter. The filter will be rein-
stalled with the same orientation. Refer to Fig. 27.
4. The label on the top side of the filter points to the side that should be cleaned.
Refer to Fig. 27. With a vacuum cleaner and upholstery brush attachment, clean
the filter until all particles are removed. Do not use water or liquids to clean.
5. Install the filter with arrows pointing towards the unit. Refer to Fig. 27. Press
the filter firmly into the air purifier. To avoid damaging the filter media, you
should press on the frame of the filter only.
Fig. 26
Continued
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