Phenomenon Check items Solution
Odours are 
emitted
● Whether there’s odour source,
   such as furniture and cigarette, 
   etc.
● Eliminate the odour source.
● Clean the lter.
Air conditioner 
operates nor-
mally suddenly
● Whether there’s interference,
   such as thunder, wireless 
   devices, etc.
● Disconnect power, put back 
   power, and then turn on the 
   unit again.
Outdoor 
unit has 
vapor
● Heating mode is turned on?
● During defrosting under he-
   ating mode, it may generate
   vapor, which is a normal 
   phenomenon.
“Water 
owing” 
noise
● Air conditioner is turned on or
   turned off just now?
● The noise is the sound of 
   refrigerant owing inside 
   the unit, which is a normal
   phenomenon.
Cracking 
noise
● Air conditioner is turned on or
   turned off just now?
● This is the sound of friction 
   caused by expansion and/or
   contraction of panel or other 
   parts due to the change of
   temperature.
Malfunction analysis