If you notice a strange smell when using F1 with the air purifier, it is most likely caused by a faulty cartridge or incorrect installation. Please follow the steps below to troubleshoot.
#1 Check the Filter Cartridge
Long-term use or leaving the cartridge in a humid environment can cause it to fail.
If the cartridge is faulty, it needs to be replaced.
#2 Check the Exhaust Pipe
The air inlet of the purifier is supposed to be connected to the air outlet of F1.
If else, it may cause the smoke to go back into F1. Please make sure the connection is correct.
#3 Check the Top Cover
At one edge of the top cover, there is an sticker indicate the direction.
Make sure the sicker faces the back side of the purifier where the inlets and outlets are located.