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Si21-205
Troubleshooting Based on Equipment Condition
Troubleshooting
129
1.8
Equipment produces loud noise or shakes.
Applicable Model
All models of SkyAir series
Error Detection
Method
Error Generating
Condition
Possible Cause
Faulty installation
Excess charge of refrigerant
Air intrudes into refrigerant system
Flushing noise due to refrigerant shortage. (Sound of shoo...)
Troubleshooting
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.
Normal. Operation sound of
draining device.
Sound may be settled if a
head is made high.
Further more, correct
installation state of local drain
piping.
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
Does
the noise generate
with vibration of whole
ceilings and
walls?
YES
NO
NO
NO
Does
the noise generate
with vibration of unit
mounting section?
Continuous
slight noise of "shoo..."
during cooling or
defrosting.
YES
[Power supply side]
Is the piping secured?
Sound of
"shoo..." generates
just after operation start or
stop, or defrosting
start or stop.
NO
NO
Does the
fan contact with other
parts?
Sound of
"shoo..." generates
during cooling or after
operation
stop.
NO
Does the
pipe contact with
casing?
YES
NO
YES
YES
NO
Is
the noise
flushing sound from
pressure reducing valve
or capillary
tube?
YES
[Installation work side]
NO
∗
Excess charge of refrigerant
∗
Air intrudes into refrigerant
system
∗
Flushing noise due to
refrigerant shortage. (Sound
of shoo...)
YES
YES
Creak during
heatingand after operation
stop.
(S1997)
YES
Continuous
noise of "juru-
juru"(sound due to
drain water flow) is
generated during
cooling operation or
just after stop.
head
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
WRONG
Fig. 18
WRONG
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
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