[Power supply side]
[Installation work side]
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Caution
YES
Correction of installation.
Reinforcement for ceilings or
walls
NO
NO
NO
NO
NO
NO
YES
Insert shock absorber in
mounting section, or strengthen
the mounting section.
NO
NO
NO
NO
Is the piping secured?
NO
Insert cushion materials to the
pipe support such as saddle.
YES
Disassemble and remove parts
contact.
YES
Correct piping manually or
attach a dead weight to pipe.
YES
Normal.
YES
Normal. The sound is flushing
noise of gas (refrigerant) inside
air conditioning unit
YES
Normal. The noise is a sound
generated at the time of gas
(refrigerant) flow change or stop.
YES
Normal. Operation sound of
draining device
YES
Normal. Creak generates by
shrinkage of resin parts due to
temperature change.
YES
It is normal.
YES
After vacuum drying, charge
correct amount of refrigerant.
* Overcharge of refrigerant
* Air mixed in refrigerant system
* Flushing noise due to refrigerant
shortage.
(Sound of shoo...)
Does the
noise generate with vibration
of whole ceilings and
walls?
Does the
noise generate with
vibration of unit mounting
section?
Does the fan contact
with other parts?
Does the pipe
contact with casing?
Is the
noise flushing sound
from pressure reducing valve or
capillary tube?
Continuous
slight noise of "shoo..." during
cooling or defrosting
Sound of
"shoo..." generates just
after operation start or stop, or
defrosting start or stop.
Sound of
"shoo..." generates during
cooling or after operation
stop.
Creak during
heating and after operation
stop
Is this an
impact noise at the start/end
of defrosting?
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