Equipment Produces Loud Noise Or Vibration - Daikin SkyAir GQI-Eco Series Service Manual

Symptom-based Troubleshooting
2.9

Equipment Produces Loud Noise or Vibration

Applicable Model All models of SkyAir series
Supposed
Causes
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Does the
noise generate with vibration
of whole ceilings and
walls?
NO
Does the
noise generate with
vibration of unit mounting
section?
NO
Is the piping secured?
[Power supply side] YES
Does the fan contact
with other parts?
NO
Does the pipe
contact with casing?
NO
Is the
noise flushing sound
from pressure reducing valve or
capillary tube?
NO
96
Defective installation
Overcharge of refrigerant
Air mixed in refrigerant system
Flushing noise due to refrigerant shortage. (Sound of shoo...)
[Installation work side]
YES
YES
slight noise of "shoo..." during
cooling or defrosting
NO
"shoo..." generates just
after operation start or stop, or
defrosting start or stop.
YES
"shoo..." generates during
cooling or after operation
YES
heating and after operation
YES
impact noise at the start/end
* Overcharge of refrigerant
* Air mixed in refrigerant system
* Flushing noise due to refrigerant
shortage.
(Sound of shoo...)
Continuous
YES
NO
Sound of
YES
NO
Sound of
YES
stop.
NO
Creak during
YES
stop
NO
Is this an
YES
of defrosting?
NO
SiBE281013
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
Correct piping manually or
attach a dead weight to pipe.
Normal. Creak generates by
shrinkage of resin parts due to
temperature change.
Normal.
It is normal.
After vacuum drying, charge
correct amount of refrigerant.
Service Diagnosis