Panasonic MCUL674 Operating Guide

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D) DUST BIN FILTER CHANGING AND CLEANING
Check primary filter frequently and clean when dirty. Remove the dust bin assembly as outlined in the DUST BIN CLEANING
section and empty contents of dust bin. 
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Grasp primary filter and push it against the inner wall of the
upper dust bin to release it. Then pull primary filter straight
out from upper dust bin as shown.
Clean primary filter by gently tapping over a trash container.
CAUTION: 
Make sure upper dust bin is empty
before filter is removed.
CAUTION:
Rinse with water only, do not use detergent or soap.
Allow filter to dry 24 hours before putting it
back into the dust bin. When the cleaning of the filter no longer restores vacuum cleaner suction to full power
you need to replace the filter. 
CAUTION: 
When cleaning filter, do not use brush
or other similar tools that would damage the filter
itself. 
Simply tap the filter on the edge of cap for normal dry cleaning.
For more thorough cleaning, rinse outside of filter with water and allow to dry thoroughly before reuse in vacuum cleaner.
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E) CLEANING SECONDARY FILTER SCREEN
The secondary filter screen protects the motor.
Always check filter screen when cleaning dust bin.
If dirty or clogged, remove debris from filter screen. 
Secondary
Filter Screen
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F) EXHAUST FILTER MAINTENANCE
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Exhaust
Filter Cover
Tab
Latch
HEPA
Exhaust Filter
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Rotate upper dust bin clockwise from the locked position to
the unlocked position as shown.
Separate the upper dust bin from the lower dust bin by lifting
it straight off.
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Locking Tabs
TO ASSEMBLE THE DUST BIN
Align the filter with the locking tabs in the dust bin and push
down until you hear a click. 
TO CLEAN PRE-FILTER
Turn clockwise and pull the pre-filter. Clean by gently tapping
over a trash container.
Assemble and align the top and bottom of dust bin. Turn
counter-clockwise to the lock position.
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Return the pre-filter to the dust bin, aligning the filter screen
tabs to the lower dust bin slots, then turn counter-clockwise
to the lock position.
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A retention clip is located on the hinge area of the dust
bin. 
This clip may release when the dust bin door is opened
to prevent damage to the door or the dust bin.
To reassemble, slide the tabs on the dust bin door into
the slots on the dust bin.  
Secure in place using the retention clip.
The exhaust filter removes dirt from recirculated air. 
Check filter after emptying dust bin.
To remove, press on the filter cover latch, pull both sides of
the exhaust filter cover with a counter-clockwise movement.
Grasp the HEPA exhaust filter and pull out to remove.
Replace the exhaust filter making sure that the foam seal on
the exhaust filter is down and the arrows indicating the air
flow direction point up.
Reinstall exhaust filter cover by snapping into place. 
IMPORTANT - Exhaust Filter cannot be cleaned and should
be replaced at least once each year.