Daikin R71FUV1 Service Manual page 58

Symptom-based Troubleshooting
A
Continuous
slight noise of
"shoo..." during cooling
or defrosting
NO
Sound
of "shoo..."
generates just
after operation start or
stop, or defrosting
start or stop.
NO
Sound
of "shoo..."
generates during
cooling or after
operation
stop.
NO
Creak
during heating
and after operation
stop
NO
Is this
an impact
noise at the start/end
of defrosting?
NO
• Refrigerant overcharge
• Air mixed in refrigerant
system
• Flushing noise due to
refrigerant shortage.
(Sound of shoo...)
YES
YES
YES
YES
YES
Si20-701_B
Normal.
The sound is
flushing noise of
refrigerant inside
air conditioning
unit.
Normal.
The noise is a
sound generated
at the time of
refrigerant flow
change or stop.
Normal.
Operation sound
of draining
device
Normal.
Creak generates
by shrinkage of
resin parts due to
temperature
change.
It is normal.
An impact noise can
be reduced by means
of "Defrost Noise
Reduction Setting."
After vacuum
drying, charge
correct amount of
refrigerant.
51