Coway AP-2021A Gray User Manual page 18

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HOW TO USE
Tips
How to use smart mode
Press the power button to turn on the product and press the clean mode button to select smart mode.
* When smart mode is selected, the circulation mode is operated as full circulation by default, and the wind
direction is automatically adjusted by air quality.
* If the gas pollution level is greater than the
PM2.5 pollution level, the gas pollution level
controls the air speed and the air quality
color, and the displayed measurement
automatically changes from PM2.5 to gas
level (only in smart mode and eco mode).
- Smart mode
The product operates automatically with ideal speed (Auto level 1 → Auto level 2 → Auto level 3)
and wind direction according to indoor air quality detected by the sensor.
This mode is convenient for general users.
Air quality
Air Speed
- Sleep mode (Operates only in smart mode)
If the room remains dark during smart mode operation for more than 3 minutes, the device
enters sleep mode and runs low air speed/low noise/power saving operation.
* During the sleep mode, all the indicators and air quality indicator except for the light button are turned off.
* When the room becomes bright again, the device re-enters smart mode.
* During the sleep mode, fine dust monitoring is not operated.
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- Plug the power cord into an outlet before operating the product.
- When the product is turned on for the first time, it operates in power off, and
afterward, it operates in the previously used mode.
- Depending on the use environment (around a construction site, around a road side,
using a vacuum cleaner, cleaning blanket/clothes, around a fabric couch, etc.),
dust concentration may differ.
- In the following cases, the dust concentration may be displayed higher.
1. When using in a space with hairy carpets nearby or hairy pets around,
in clothing shops, or in a high humidity condition
2. When using a humidifier, electric rice cooker, water spray, or spray
3. When using in a space where outside air is flowed in (around an air
conditioning facility, ventilation system, drafty windows/doors)
- There may be differences in displays of dust, gas level, etc. by using different products
in the same place or by internal ventilation. The values on display may differ by
measuring instruments or products.
- Dust concentration indicator on display may differ from forecasts by the ministry of
environment.
- The gas air quality may not change even when there is a strong odor if the strength of
gas is consistent without changes.
- Materials with intense odor such as diffusers, deodorants, cleaners, etc., may affect
the gas air quality.
- The gas sensor may react and light up in red in case of change in the odor, such as
cooking food indoor or temporary inflow of outside air, so ventilate for 1~2 hours.
Good (Blue)
Level 1
Normal (Green), Poor (Yellow)
Level 2
Bad (Red)
Level 3

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