Operating Noise And Vibrations - Daikin FTXA20A Service Manual

1 | Troubleshooting

1.6.4 Operating noise and vibrations

Service manual
34
Check
Check the installation conditions
(specified in the installation manual).
Check the outdoor temperature.
Check
Check the installation conditions
(specified in the installation manual).
Check refrigerant charge.
Check the expansion valve.
Detail
▪ Does the installed
sufficient capacity?
▪ Is there a short circuit air flow caused
by insufficient installation space?
▪ Heating operation cannot be used
when the outdoor temperature is
18°C WB or higher.
▪ Cooling operation cannot be used
when the outdoor temperature is
below –10°C DB.
Detail
▪ Use general vibration prevention
where needed.
▪ If the mounting wall is too thin, you
must use cushion material or rubber,
or change the installation place.
▪ Refrigerant piping is too short; is the
length within specified range?
▪ Due to bad installation or general
conditions there may be deformation
of the unit.
▪ Are all the screws installed and
tightened properly?
▪ Is all piping secured, fixed and
supported by inserting a cushion
material where needed?
▪ Install piping weights or correct by
hand if any piping is in contact with
other parts.
▪ Is the fan in contact with other parts?
If so separate the fan from the other
parts.
▪ Is the unit filled with the specified
refrigerant volume?
▪ Is there a flushing noise, due to
refrigerant shortage?
▪ Is there air in the system?
If a passing sound is heard from the
pressure reducing valve, apply sound
insulation sheets of putty to reduce the
valve noise.
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
model has
Split Stylish R32
ESIE18-03D – 2021.05