Mitsubishi MSZ09UN Operating Instructions Manual page 25

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Question
The air conditioner
cannot be operated
for about 3 minutes
when restarted.
Cracking sound is
heard.
The room smells
strange.
The fan stops
during the DRY
operation.
The sound of water
flowing is heard.
The sound as
burbling is heard.
The room cannot be
cooled sufficiently.
Answer (not a malfunction)
I This protects the air conditioner according to instruc-
tions from the microprocessor. Please wait.
I This sound is generated by the expansion/contraction
of the front panel, etc. due to change in temperature.
I The air conditioner sucks in an odor adhering to the
wall, carpet, furniture, cloth, etc. and blows it out with
the air.
I In DRY operation, the unit operates using the same
refrigerant circuit as in COOL operation. DRY opera-
tion time has to be reduced in order to lower humidity
without much room temperature decreasing. So the
compressor sometimes stops, and at the same time
the indoor fan stops. This prevents water condensed
on the heat exchanger from evaporating again.
I This is the sound of refrigerant flowing inside the air
conditioner.
I This is the sound of condensed water flowing in the
heat exchanger.
I This is the sound of the heat exchanger defrosting.
I This sound is heard when the outside air is absorbed
from the drain hose in turning on the range hood or
the ventilation fan and that makes water flowing in the
drain hose spout out.
This sound is also heard when the outside air blows
into the drain hose in case the outside wind is strong.
I When a ventilation fan or a gas cooker is used in a
room, the cooling load increases, resulting in an in-
sufficient cooling effect.
I When the outside air temperature is high, the cooling
effect may not be sufficient.