Air Purifier User's Manual
27 28
Before Requesting for After Sale Service
Wind is not
coming out.
Airflow does
not change.
Strength of
wind has
significantly
weakened.
Pollution level
does not
change.
Symptom
Please Check
Measures to Take
Is power cord plugged?
�
Plug power cord into
120V~ power outlet.
Is display panel turned off?
�
Turn power switch on and select
switch for desired function.
Is mode indication lamp
turned on?
�
Airflow selection cannot be made
unless in manual operation mode.
(Status normal)
Is there dust built up in the lens of
dust pollution detection sensor?
�
Remove dust. (Refer to page 25.)
Is the pollution level continuously
displayed high?
�
Adjust sensitivity of dust pollution
detection sensor to low.
(Refer to page 24.)
Is the pollution level continuously
displayed low?
�
Adjust sensitivity of dust
pollution detection sensor to
high. (Refer to page 24.)
Is the room dark?
�
Airflow selection cannot be made
during sleep mode operation.
(Status normal)
Check for the status of
power failure?
�
Operate product after power is
back on.
Is filter cover closed?
�
Properly close filter cover.
Has the time for filter cleaning or
replacement passed?
�
Replace or clean filter.
After checking symptoms, unplug power cord and make inquiries
or request for after sale service.
�
Is the position of swing
grill correct?
�
Turn off power and turn it on
again before use.
Please check the followings before requesting for after sale service.
Even if product is not out of order, air purifier may not operate properly due to insignificant causes
or user
’s unfamiliarity with handling the product. In such cases, check for the following symptoms
and corrective measures to solve simple troubles without the help of our service center.
If the problem is not solved after checking the followings, please contact our service center.
Caution
How to Use
Self Diagnosis
Customer Service
Air and
Health
Air and Health
Yellow dust refers to the phenomenon of dust and soil from the yellow earth region in the
valley of the Yellow River and desert region of China and Mongolia floating in the wind and
falling down to the ground to cause visibility impairment mainly during springtime, the dry
season.
When yellow dust phenomenon occurs, it causes clouding of visibility and change of sky into
yellowish brown color, thus results in deterioration of visibility and building up of fine yellow
dust particles on human body and objects. Yellow dust, when generated in desert region,
mainly consists of quartz (silicon) and, when generated in yellow earth region, largely made up
of aluminum contents. However, in the recent times, the wind containing yellow dust passes
through the upper air of industrial zone in China, thus delivers pollutants of heavy metals or
sulfurous acid gas. As such, yellow dust is causing serious environmental pollution in the
recent days.
Damages of Yellow Dust
Yellow dust phenomenon blocks out and diffuses sunlight to impair visibility. Thus, it blocks
the pores of agricultural crops or broad-leaved trees, causing impediment in their growth.
Therefore, frequent occurrence of yellow dust phenomenon can lead to serious damage to
agricultural crops or forest, etc.
In addition, it may cause problems in precision machinery, such as semiconductors and
aircrafts, etc, thus result in significant damages to them. The ill effects of yellow dust on
human body include bronchitis and asthma, etc. by penetrating deep into the respiratory
organ and conjunctivitis and xerophthalmia, etc. by getting in contact with eyes. However, as
yellow dust contains a large quantity of alkaline contents, it neutralizes acidic pollutants even
after it falls down to the ground. Therefore, it also has the positive effect to assist in
prevention of acidifying rainwater on the inland area.