Troubleshooting
ESIE13-02
Part 4 – Troubleshooting
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Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Continuous
slight noise of "shoo..." during
cooling or defrosting
Creak during
heating and after operation
stop
Sound of
"shoo..." generates
just after operation start or
stop, or defrosting start
or stop.
∗
Excess charge of refrigerant
∗
Air intrudes into refrigerant
system
∗
Flushing noise due to
refrigerant shortage.
(Sound of shoo...)
Does the
noise generate with
vibration of unit mounting
section?
Does the
noise generate with
vibration of whole ceilings
and walls?
Is the piping
secured?
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?
Correction of installation
Reinforcement for ceilings or
walls
Insert shock absorber in
mounting section, or strengthen
the mounting section.
Normal. The sound is flushing
noise of gas (refrigerant) inside
air conditioning unit
Insert cushion materials to the
pipe support such as saddle.
Normal. The noise is a sound
generated at the time of gas
(refrigerant) flow change or stop
Disassemble and remove parts
contact.
Correct piping manually or
attach a dead weight to pipe
Normal. Creak generates by
shrinkage of resin parts due to
temperature change.
Normal.
After vacuum drying, charge
correct amount of refrigerant.
NO
YES
YES
YES
YES
YES
NO
NO
NO
YES
[Power supply side]
NO
NO
NO
NO
YES
NO
YES
YES
NO
YES
[Installation work side]
It is normal.
YES
Is
this an impact
noise at the start/end of
defrosting?
