Muji AD-SD1-SG, User Manual

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Are there any bubbles accumulated on or around the ultrasonic
diaphragm?
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At low water temperatures, bubbles may accumulate on or around
the ultrasonic diaphragm, preventing mist from emitting well.
Turn the power off, and then use a cotton swab or similar to
gently clean any bubbles adhering to the ultrasonic diaphragm.
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Are the outer cover and inner cover correctly installed?
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Ensure that the outer cover and inner cover are correctly in place.
When the outer cover and inner cover are misaligned, mist will
not emit consistently from the diffuser outlet.
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Is the air intake at the bottom of the diffuser unit dirty?
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Dust, etc. accumulated around the air intake at the bottom of the
diffuser unit will reduce air flow and prevent mist output.
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Is the diffuser set in a location subject to high/low temperature
and humidity?
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<High temperature/humidity> Mist volume will increase. Even with a
full water tank (100ml maximum), water may run out prior to the end
of a 180-minute timed session. This is not a malfunction.
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<Low temperature/humidity> Mist volume will decrease. Water may
not be consumed as quickly as normal. This is not a malfunction.
* Mist may not be visible depending on the temperature, humidity,
or other surrounding factors.
Even if the mist is difficult to see, there is no malfunction as long
as mist is being generated within the water tank and the fan is
operating (you can hear the fan motor).
Water is leaking
from the diffuser
unit
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Is the outer cover installed correctly?
Is the inner cover misaligned or missing?
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Ensure that the outer cover and inner cover are correctly in place.
If the outer cover and inner cover are misaligned, mist will not
reach the diffuser outlet, and water will leak inside the diffuser unit.