AB-5961
15
1) Prepare the new filter set (optional) for replacement.
Loosen the old filter cap and filter and remove from the
duct sensor.
Figure 27. Filter cap removal
2) Before attaching the new filter, check that the rubber
packing sealing the sensing element is not raised from
the probe, as shown in Fig. 28.
Figure 28. Rubber packing position
For rubber packing raised, press it using a slotted
screwdriver as shown in Fig. 29.
Figure 29. Pressing rubber packing
CAUTION
Carefully press the rubber packing.
Your fingers holding the tool might slip causing
injury if you put too heavy force on the rubber
packing.
IMPORTANT:
Carefully use a slotted screwdriver or other tools
while replacing the filter.
Failure to do so might damage the electronic
components and rubber packing.
3) Attach the new filter and then the new filter cap to the
duct sensor.
Figure 30. Attaching new filter and filter cap
4) Hand-tighten the filter cap.
Figure 28. Tightening new filter cap
Press rubber packing using a
tool such as a slotted
screwdriver to completely
seal..
Press
Filter cap
(The filter inside the cap will
be removed as well.)
Loosen.
Tighten.
Filter cap
Filter cap
Filter
1.
2.
1. Attach the filter.
2. Attach the filter cap.
Rubber packing:
not raised from the probe to
completely seal the element.
Rubber packing:
raised from the probe.
Sensing element may not
completely be sealed.
Sensing
element
Sensing
element
Good position of
rubber packing
Good position of
rubber packing
