Philips HU4803 User Manual page 14

Problem
The filter turns
yellowish after some
time.
There is unpleasant
smell coming out from
the humidifier.
No air comes out of
the air outlet.
I do not see visible
mist coming out of
the humidifier. Is it
working?
I want to check
whether the humidity
sensor works or not.
12 EN
Possible solution
The yellow deposits is a natural effect of the wick material,
and it has no impact on humidification performance. Clean
the humidification filter frequently to remove the scale, and
replace the humidification filter every three month.
• Make sure that the water tank is filled with water.
• Clean the humidification filter (see the chapter 'Clean the
humidification filter').
Put the plug of the humidifier into the wall socket and switch
on the humidifier.
When mist is very fine, it is invisible. This humidifier has a
NanoCloud humidification technology, which produces
healthy humid air from the outlet area without formation of
water mist. Therefore, you cannot see the mist.
Gently blow moist air into the humidity sensor. After a while,
the humidity indication changes. The indication can show the
ambient humidity level from 20%RH to 95%RH.