Daikin Sensira Series, Service Manual

Page: 31 / 172

1 | Troubleshooting
Service manual
31
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
Check Detail
Check the installation conditions
(specified in the installation manual). ▪ Does the installed model has
sufficient capacity?
▪ Is there a short circuit air flow caused
by insufficient installation space?
Check the outdoor temperature. ▪ 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.
1.6.4 Operating noise and vibrations
Check Detail
Check the installation conditions
(specified in the installation manual). ▪ 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.
Check refrigerant charge. ▪ Is the unit filled with the specified
refrigerant volume?
▪ Is there a flushing noise, due to
refrigerant shortage?
▪ Is there air in the system?
Check the expansion valve. If a passing sound is heard from the
pressure reducing valve, apply sound
insulation sheets of putty to reduce the
valve noise.