Fujitsu ARU12RLF, Design & Technical Manual

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6. SYSTEM DESIGN
[Installation precautions]
Contents Countermeasures (Reference)
When
installation
environment is
quiet When the wall mounting type was installed
in a bedroom, living room, or other quiet
place, the sound of the refrigerant flow may
be sensed as noise and must be taken into
accunt. 1) Plan installation of a branch
box farther from indoor
unit.
2) Plan installation using
another air conditioner.
When
installing duct
type in ceiling
chamber
system In the case of the ceiling chamber system
(duct is not installed at indoor unit inlet
side and room air is sucked into the indoor
unit through the inside of the ceiling), the
thermistor inside the indoor unit may not
correctly detect the room temperature.
Heating operation: Room is not heated
because the indoor unit is easily turned off by
the thermostat.
Cooling operation: Room is too cold because
the indoor unit is difficult to turn off by the
thermostat.
1) Replace the indoor unit
thermistor with a Remote
sensor unit (optional
parts) and install the
sensor where the room
temperature can be
correctly detected
When the
outlet air is
sucked in at
duct type Cooling operation does not cool the room
and heating operation does not heat the room
because the short circuited indoor unit is not
turned on by the thermostat. 1) Reconsider the ventilation
port construction
2) Replace the indoor unit
thermistor with a Remote
sensor unit (optional
parts) and install the
sensor where the room
temperature can be
correctly detected.
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