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MULTI TYPE
2-3 rooms type
Condition Contents Countermeasures (Reference)
When using
an external
duct.
When using an external duct to take in new fresh air,
etc., condensation may form on the surface of the
duct due to the effect of the outside air temperature
and the humidity inside the ceiling.
Always perform heat insulation
processing.
(Heat insulating material: Glass
wool 25 mm (1-in) thick or more.)
When the
remote
controller
installation
site is bad.
If the cold or warm air blown out from the air
conditioner directly contacts the thermostat section of
the remote controller, the outlet temperature of the air
conditioner may be sensed and room temperature
control will be different from the room temperature,
and “not cooled” or “not heated” or other trouble may
occur.
In addition, there is the possibility that the same kind
of trouble may also occur when the remote controller
is effected by direct sunlight.
1. Install the remote controller
where it will not be directly
exposed to the cold or hot air.
2. Install the remote controller
where it will not be directly
exposed to sunlight or strong
lighting.
When
installation
environment
is quiet.
When the wall mounted 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 account.
1. Plan installation of a model
with external expansion valve.
2. Plan installation of a branch
box farther from indoor unit.
3. 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 thermo-
stat.
• Cooling operation: Room is too cold because the
indoor unit is difficult to turn off by the thermostat.
Replace the indoor unit
thermistor with optional Remote
sensor unit, 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 therm-
istor with optional Remote
sensor unit, and install the
sensor where the room
temperature can be correctly
detected.
When using
the wireless
remote
controller.
Signals may not be received when using it in a room
illuminated by an inverter fluorescent lamp.
Turn on the fluorescent lamp and
check if the indoor unit receives
the signals from the remote
controller. If the indoor unit does
not receive the signals, consult
an authorized service personnel.
When
installing the
inverter type.
It may generate noise in TV sets, stereos and PCs. The inverter type should be
installed at a sufficient distance
from these equipments.
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