
• Is the display part all turned o ?
Press the power button and then select the desired function.
• Isn’t the power gone out ?Use the air purier after the power comes back on.• Is the front cover closed ?Close the front cover properly.• Isn’t it in manual ?
Set the desired operating mode.
• Isn’t the lter cleaning or replacement time passed ?Check the lter cleaning and replacement cycles and then clean/replace the lter(s) if necessary.• Isn’t the lter cleaning or replacement time passed ?Check the lter cleaning and replacement cycles and then clean/replace the lter(s) if necessary.
• Isn’t there dust on the pollution sensor’s lens ?Clean the lens of the pollution sensor.• Does the pollution level keep indicating a high level ?Adjust the sensitivity of the pollution sensor to Insensitive or standard.• Does the pollution level keep indicating a low level ?Adjust the sensitivity of the pollution sensor to sensitive or standard.• Check the symptoms, unplug the product, and ask service center.