Lennox LM012CI-120V432-X Owner's Manual page 22

Malfunction analysis
Phenomenon
Odours are
emitted
Air conditio-
ner operates
abnormally
Outdoor
unit has
vapor
"Water
noise
Cracking
noise
Check items
● Whether there's odour source,
such as furniture and cigarette,
etc.
● Whether there's interference,
such as thunder, wireless
devices, etc.
● Heating mode is turned on?
● Air conditioner is turned on or
turned off just now?
● Air conditioner is turned on or
turned off just now?
Solution
● Eliminate the odour source.
● Disconnect power, put back
power, and then turn on the
unit again.
● During defrosting under he-
ating mode, it may generate
vapor, which is a normal
phenomenon.
● The noise is the sound of
the unit, which is a normal
phenomenon.
● This is the sound of friction
caused by expansion and/or
contraction of panel or other
parts due to the change of
temperature.