Levoit Core 400S Series User Manual page 17

TROUBLESHOOTING (CONT.)
Problem
Poor air purification quality.
is still on after replacing
the filter.
has not turned on within
12 months.
turned on before 12
months.
Air Quality Indicator always
stays red.
Air Quality Indicator always
stays blue, even when the air
quality is poor.
Display shows Error Code
"E1".
If your problem is not listed, please contact
Possible Solution
Tap to increase the fan speed.
Make sure no objects are blocking the sides or top of the
air purifier (the inlet or outlet).
Make sure the filter is removed from its packaging and
properly in place (see page 7).
Close doors and windows while using the air purifier.
If the room is larger than 37 m² / 403 ft², air purification
will take longer. The air purifier may not be as effective in
significantly larger rooms.
Replace the filter (see page 15).
Reset the Check Filter Indicator (see page 14).
is a reminder for you to check the filter and will light
up based on how much the air purifier has been used
(see page 14). If you don't use your air purifier often,
will take longer to turn on.
is a reminder for you to check the filter and will light
up based on how much the air purifier has been used
(see page 14). If you run your air purifier frequently,
will turn on sooner.
The AirSight Plus Laser Dust Sensor may need to be
cleaned (see page 15).
If you're using an ultrasonic humidifier near the air
purifier, the mist may affect the accuracy of the AirSight
Plus Laser Dust Sensor. The sensor will detect the large
mist particles, and the Air Quality Indicator may turn red.
Avoid using an ultrasonic humidifier near the air purifier,
or avoid using Auto Mode.
The AirSight Plus Laser Dust Sensor detects airborne
particles, but it cannot detect gas. Make sure there isn't
gas polluting the air.
The motor has malfunctioned. Please contact Customer
Support (see page 21).
Customer Support (see page
EN
21).
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