Fujitsu RXA24CAT Operation Manual

Fujitsu RXA24CAT Operation Manual
ROOM AIR CONDITIONER
OPERATING MANUAL
MODEL
PART No. 9360770028-03
RX-18 RXA-18 SERIES
RX-24 RXA-24 SERIES
Before Starting
WARNING
(1) In order to enable efficient and trouble-free operation of your air conditioner, connect the power plug of your air
conditioner through an exclusive circuit, having a time delay fuse, to the correct power supply describe on the rating
plate.
(2) Please connect the “L ” line of the power supply cord to the “Live” terminal of the power outlet, and the Earth line
(Green and Yellow) to the Earth terminal. The remaining line should be connected to the Neutral terminal of the power
outlet.
(3) If the power supply cord of this appliance is damaged, it should only be replaced by the authorized service personnel,
since special purpose tools and specified cord are required.
–1–
(4) Where the rear and sides of the unit are unobstructed.
INSTALLATION
WARNING
In the work of this item, the authorized service personnel
should work.
1. Installation location
(1) Select a place where cool air emitted from the Air Conditioner circulates evenly, reaching every part of the room.
Make sure that no obstacles both inside and outside the
room prevent the air flow.
Rear
Front
Condenser Air Outlet
at least 60 cm
Condenser Air
Inlet Both Sides
top
Evaporator Air Outlet
(2) Where practicable, locate the air conditioner with the
lower edge of the cabinet approximately 0.75 m (29.5”)
to 1.5 m (59”) from the floor. This usually gives the
optimum air circulation pattern within the room for
cooling and heating.
(3) Mounting must be strong enough to support the weight
of the air conditioner with sufficient rigidity to prevent
vibration being transmitted to windows and the like.
–2–
at least 20 cm
2. The Dimension of opening for mounting
455 ~ 460 (mm)
Fit the small urethane foam
into the space between the
cabinet and the unit.
670 ~ 673 (mm)
3. Installation process
(1) Remove the front panel.
(2) Slide out the unit from the cabinet.
(3) Fix the cabinet to the timber frame using nails or screws
so that the condenser air inlet louvre is placed outside
the wall. If required, support the cabinet in the wall with
brackets and completely weather seal any gap between
the cabinet and the wall.
(4) Push the unit completely back into the cabinet.
(5) Next, fit the attached urethane foam into the space
between the cabinet and the bottom of the unit with a
screw driver to seal the room inside from the outside.
(6) Refit the front panel.
NOTE: When constructing a timber frame, arrange so that
the outside rear of the air conditioner is between
0.5 ~ 1 cm lower than the front of the unit. This allows
condensed water to drain off outside the room. If the
inside of the air conditioner is lower, condensed water
and rain may flow into the room.
–3–
4. Typical installation
Fit flashing or insert caulking compound
behind top outside architrave.
Condenser air inlet louvres
Recommended architrave
57 mm (2-1/4”) × 13 mm (1/2”)
tapering to 8 mm (5/16”) typical
all round on front and rear of unit.
Timber frame — typical all round on
front and rear of unit.
50 mm (2”) × 6 mm (1/4”) sponge rubber
strip — typical all round on front and rear
of unit.
Front panel
Condenser air inlet louvres must
be completely clear of outside architrave surface.
If required attach the cabinet support
brackets (not supplied) to the cabinet and the wall.
–4–
Control Panel
Operation controls provided are, THERMOSTAT, MASTER CONTROL, SWEEP ANGLE (JET VANE) SWITCH and EXHAUST AIR
DAMPER.
–5–
Controller
Position
OFF
FAN
MASTER
CONTROL
LOW
MED
HIGH
THERMOSTAT
1-10
ON
SWEEP ANGLE
(JET VANE)
OFF
SELECT LEVER
EXHAUST AIR
OPEN
CLOSE
Cooling
Description
The air conditioner is switched
off.
Fan only is operating to provide
filtered air without cooling
effect.
Fan (Low Speed) and
compressor operate at quiet
cooling.
Fan (Medium Speed) and
compressor operate at
intermediate cooling.
Fan (High speed) and
compressor operate at rapid
cooling.
Cooling is automatically
controlled according to setting
selected. The higher numbers
on the dial indicate lower
temperature.
Vertical louvres continuously
change the direction of air flow.
When the master control knob
is set to “OFF”, the SWEEP
ANGLE (JET VANE) does not
operate.
Vertical louvres stop enabling
air flow to be directed in any
desired direction.
This lever is used to adjust the
air flow direction and sweep
angle. For details, refer to
pages 5 ~ 8.
Room air is drawn outside.
Exhaust vent is closed.
To obtain maximum cooling effect in the hot summer select
position HIGH on the master control. Maximum moisture
removal, air circulation and dust removal are effected at the
same time.
Selection of LOW reduces operating noise.
Air Circulation
An adequate flow of air is very important for comfort. When
the master control knob is set at “FAN” position, the fan only is
actuated so that the air is filtered and circulated without cooling
effect.
If desired, it is possible to expel room air.
Air circulation only without cooling effect may also be achieved
with the thermostat knob turned counterclockwise to “1”
position and with the master control between “HIGH” and
“LOW” position.
Thermostat Control
The thermostat is set by means of the thermostat control.
When the room temperature is higher than the thermostat
setting, the compressor is automatically switched on to provide
a cooling effect. When the room temperature is lower than the
thermostat setting, the compressor is automatically switched
off to stop cooling.
It can be seen therefore, that the thermostat serves to keep the
room temperature constant by causing the compressor to start
and stop automatically.
–6–
1. When you wish to lower the temperature, turn the
thermostat control clockwise in the direction of the higher
numbers on the dial.
2. When you wish to increase the temperature, turn the
thermostat control counterclockwise in the direction of the
lower numbers.
3. When the thermostat is set at positions “5”, “6” or “7”,
comfortable room temperatures can usually be obtained.
Please note that it is unhealthy for the room temperature to
be lower than approximately 22°C.
4. When the thermostat control is positioned at “10”, the
room-side fin coil may freeze up due to excessively low
room temperature (for example, below 18°C) caused by low
outdoor temperature at night.
Once the fin coil becomes frozen, the air flow from the air
conditioner is restricted by the frost, and the room
temperature may rise due to the resultant weak cooling
performance of the air conditioner.
5. The thermostat positions “8”, “9” and “10” can be used
when the room temperature does not become sufficiently
low. This condition may occur when the thermostat
switches off automatically because cooled air, when it
passes through the horizontal louvres positioned
downwards and the vertical louvres positioned to the left,
makes a short circuit and the recirculated air touches the
sensor of the thermostat.
NOTE
The thermostat controls the compressor only and accordingly
the fan is constantly circulating air even during the period when
the compressor is off.
–7–
Important
When re-starting the cooling operation after it has been turned
off by either master control or thermostat, be sure to allow at
least three (3) minutes. If cooling operation is restarted
immediately after it is turned off, an overcurrent will flow
through the compressor motor and the safety device will be
actuated. If the safety device is actuated it will not be possible
to restart the compressor motor for about 20 minutes.
Exhaust Air Control
By setting EXHAUST AIR control lever to the appropriate
positions between “OPEN” and “CLOSE” position, it is
possible to expel the room air to the desired extent. The
quantity of air to be expelled will increase when the lever is
positioned closer to the “OPEN” position.
Air Direction Control
When the SWEEP ANGLE (JET VANE) switch is turned to
“ON” position, the vertical louvre is automatically actuated and
sweeps the jet of air alternately, right and left and thus more
effective cooling will be obtained.
Louvres may be stopped at any position when SWEEP ANGLE
(JET VANE) switch is turned off.
Sweep angle and direction can be adjusted with the select
lever. The sweep can span an area either to the right or to the
left. Select a sweep angle suitable to the layout of the room
and the position of the air conditioner in the room which the air
conditioner is installed.
Air Flow Adjustment
With this air conditioner, three air directions can be obtained as
shown in the figures below. When the air flow direction is set,
adjust to the desired sweep angle.
Air conditioner
Room
Right side
Air conditioner
Room
Air conditioner
Room
Centre
NOTE
Setting the vertical louvre at high room humidity.
1. Set the SWEEP ANGLE (JET VANE) switch to ON.
2. Or, to use with the SWEEP ANGLE (JET VANE) switch to
OFF, set the switch to OFF when the vertical louvre moves to
the centre.
–8–
Left side
Names and Functions
Front panel
Vertical louvres
SWEEP ANGLE (JET VANE) switch
Select lever
SWEEP ANGLE ZONE
Master control knob
–9–
Adjusting Sweep Angle
When the select lever is moved to the right or left, the sweep
angle increases or decreases. Adjust the sweep angle within
SWEEP ANGLE ZONE range.
NOTE: When the select lever is returned to the “NEUTRAL”,
the vertical louvres do not normal operate. If the select
lever is returned to the “NEUTRAL” in error, readjust
the sweep angle referring to “Adjusting air flow
direction and sweep angle”.
2. Position the vertical louvres approx. at the centre and move
the select lever fully to the right end of the SWEEP ANGLE
ZONE.
Vertical louvres
SWEEP ANGLE ZONE
NEUTRAL
Stop at the centre
Select lever
Adjusting Air Flow Direction and Sweep Angle
To direct air flow to centre :
1. Move the select lever fully left to the “NEUTRAL”.
SWEEP ANGLE (JET VANE)
switch
Select lever
3. Set the SWEEP ANGLE (JET VANE) switch to “ON”.
The vertical louvres start rotating with the maximum sweep
angle.
NOTE: If the master control knob is set to “OFF”, set it to
the other position.
4. The sweep angle can be adjusted within the SWEEP ANGLE
ZONE range. When the select lever is returned to the left,
the sweep angle decreases. Adjust sweep angle according
to preference.
NOTE: If the select lever is returned to the “NEUTRAL” in
error, the vertical louvres do not function properly.
In this event, carry out the procedure from the
beginning.
NEUTRAL
– 10 –
3. Set the SWEEP ANGLE (JET VANE) switch to “ON”.
The vertical louvres start rotating with the maximum sweep
angle.
NOTE: If the master control knob is set to “OFF”, set it to the
other position.
4. The sweep angle can be adjusted within the SWEEP ANGLE
ZONE range. When the select lever is returned to the left,
the sweep angle decreases. Adjust sweep angle according
to preference.
NOTE: If the select lever is returned to the “NEUTRAL” in
error, the vertical louvres do not function properly.
In this event, carry out the procedure from the
beginning.
To direct air flow to left side :
1. Move the select lever fully left to the “NEUTRAL”.
SWEEP ANGLE
(JET VANE)
switch
Select lever
NEUTRAL
To direct air flow to right side :
1. Move the select lever fully left to the “NEUTRAL”.
2. Lightly move the vertical louvres to the left until they stop,
and move the select lever fully to the right end of the
SWEEP ANGLE ZONE.
Vertical louvres
Select lever
NEUTRAL
Move to the left
– 11 –
SWEEP ANGLE
(JET VANE)
switch
2. Lightly move the vertical louvres to the right until they stop,
and move the select lever fully to the right end of the
SWEEP ANGLE ZONE.
Vertical louvres
Move to the right
3. Set the SWEEP ANGLE (JET VANE) switch to “ON”.
The vertical louvres start rotating with the maximum sweep
angle.
NOTE: If the master control knob is set to “OFF”, set it to the
other position.
4. The sweep angle can be adjusted within the SWEEP ANGLE
ZONE range. When the select lever is returned to the left,
the sweep angle decreases. Adjust sweep angle according
to preference.
NOTE: If the select lever is returned to the “NEUTRAL” in
error, the vertical louvres do not function properly.
In this event, carry out the procedure from the
beginning.
MAINTENANCE
Room Air Filter
A filter is provided on the rear of the removable panel. Since
the function of this filter is to filter dust and dirt in the air,
please clean it regularly before it becomes clogged with dust.
Wash the filter with clean water. If it is very dirty, rinse it in a
synthetic detergent before washing in clean water. Allow the
filter to dry thoroughly in the shade after washing. Remove the
filter in the following manner.
Using the flip position, push the bottom of the removable panel
up with your hand, pull it toward you, and the removable panel
will be easily removed (See Fig. 1, Fig. 2).
Fig. 1
Fig. 2
– 12 –
Front panel
Removable panel
UP
Removable panel
The filter is attached to the rear side of the removable panel.
Pull the lower edge of the filter forward in order to remove
the filter from the removable panel (See Fig. 3). To replace
the filter, insert the top edge of the filter under the hooks at
the top of the removable panel, then press into the two lower
hooks to fix into place (See Fig. 4).
When you want to refit the removable panel, insert it by
pushing the upper edge of the removable panel against the
upper part of the front panel.
Filter
Removable panel
How to Remove the Front Panel
WARNING
In the work of this item, the authorized service personnel
should work.
Remove the front panel in the following manner.
The front panel is attached to the cabinet with snap clips at the
top and screws at the bottom. Remove the removable panel first
and you will see two screws at the left and right of the bottom
side. Take them off. (See Fig. 5) Hold up the front panel with your
hands to remove it completely. (See Fig. 6) When refitting the front
panel, insert the two clips on the upper part of the panel into the
two slots at the top side of the cabinet. Press the front panel at
its bottom side and fix it with screws. This completes refitting of
the front panel.
Fig. 3
Upper hooks
Fig. 5
Lower hooks
Front panel
Fig. 4
How to Install the Removable Panel
The removable panel can be installed either way up so that the
filter inside is out of sight depending on the location height of
the air conditioner. In this case, the removable panel can be
easily taken off no matter if it was installed either way up.
– 13 –
Screws
Fig. 6
c) If the cooling coils are iced up, wash the filter. To get rid
of the ice quickly operate the air conditioner with the
master control knob on “FAN” position until all the ice
has gone.
NOTE:
1. A fuse may blow when a particularly large demand for
electricity, which exceeds the capacity of the fuse, occurs in
your home or when the voltage of the main power line
drops due to some fault. If the fuse blows again after
replacement with a new one, please call your dealer or
service company.
2. Your air conditioner also acts to dehumidify the room air
and to expel the water produced, therefore drops of water
emitting from the outside of the unit is quite normal.
3. The noise level of your air conditioner may be felt to be
higher at night than during the day. This is quite normal.
This results from the fact that environmental noise level is
lower at night so the noise level of the air conditioner is felt
to be relatively higher.
General Information
1. When the ambient temperature drops to 21°C (70°F) or less,
icing-up may occur on the inside cooling coils, and is quite
normal.
2. The compressor motor does not require lubrication as it
contains sufficient oil.
3. No lubrication is required for the bearings of the fan motor
as dust shielded ball bearings containing grease are fitted.
Things to Do Before Calling a Serviceman
1. If your air conditioner does not operate, check the following
items before calling for service.
a) Check that the power plug is properly connected to the
power socket.
b) Check your fuses.
2. When cooling effect is not obtained even with the air
conditioner operating, make the following checks.
a) Check that the thermostat setting is higher than the room
temperature.
b) Check the filter. A clogged filter will reduce cooling
efficiency. When a filter is excessively dirty cooling coils
may ice up.
– 14 –
580 Horikawa-cho, Saiwai-ku, Kawasaki, JAPAN
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