Fujitsu Air Conditioner AST12 User Manual

OPERATING MANUAL  
AIR CONDITIONER  
WALL MOUNTED TYPE  
Indoor Unit  
AST7  
AST9  
AST12  
SERIES  
SERIES  
SERIES  
KEEP THIS MANUAL  
FOR FUTURE REFERENCE  
P/N9373538035  
FUJITSU GENERAL LIMITED  
 
FEATURES AND FUNCTIONS  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
AUTOMATIC OPERATION  
SWING OPERATION  
The Air Flow Direction Louvers swings automatically up and  
down so that the air speeds to every nook and corner of  
your room.  
*HEAT & COOL MODEL (REVERSE CYCLE)  
Merely press the START/STOP button, and the unit will  
begin automatic operation in either the Heating, Cool-  
ing, Dry or Monitor modes as appropriate, in accordance  
with the thermostat setting and the actual temperature  
of the room.  
REMOVABLE INTAKE GRILLE  
COOLING MODEL  
The indoor units INTAKE GRILLE can be removed for easy  
cleaning and maintenance.  
Merely press the START/STOP button, and the unit will  
begin automatic operation in the Cooling or Dry mode  
as appropriate, in accordance with the thermostat set-  
ting and the actual temperature of the room.  
MILDEW-RESISTANT FILTER  
The AIR FILTER has been treated to resist mildew growth,  
thus allowing cleaner use and easier care.  
SLEEP TIMER  
*HEAT & COOL MODEL (REVERSE CYCLE)  
When the SLEEP timer button is pressed during Heating  
mode, the air conditioner’s thermostat setting is gradu-  
ally lowered during the period of operation; during Cool-  
ing mode, the thermostat setting is gradually raised dur-  
ing the period of operation. When the set time is reached,  
the unit automatically turns off.  
SUPER QUIET OPERATION  
When the FAN CONTROL button is used to select QUIET,  
the unit begins super-quiet operation; the indoor unit’s air-  
flow is reduced for quieter operation.  
COOLING MODEL  
AIR CLEANING FILTER  
When the SLEEP timer button is pressed during Cooling  
mode, the thermostat setting is gradually raised during  
the period of operation. When the set time is reached,  
the unit automatically turns off.  
The Air Cleaning Filter and Deodorant filter use an electro-  
static principle to clean the air of fine particulate matter such  
as tobacco smoke and plant pollen.  
WIRELESS REMOTE CONTROL UNIT  
The WIRELESS REMOTE CONTROL UNIT allows convenient  
control of air conditioner operation.  
2
 
NAME OF PARTS  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Fig. 1  
1
2
3
Fig. 2  
4
B
5
6
7
OPERATION  
TIMER  
9
C
0
SWING  
A
Fig. 3  
8
Fig. 4  
P
* HEAT & COOL MODEL (REVERSE CYCLE)  
G
H
Fig. 5  
D
Q
R
T
U
E
F
I
V
W
X
S
K
M
L
N
COOLING MODEL  
J
O
Fig. 7  
To facilitate explanation, the accompanying illustra-  
tion has been drawn to show all possible indicators;  
in actual operation, however, the display will only  
show those indicators appropriate to the current op-  
eration.  
Fig. 6  
3
 
Fig. 1 Indoor Unit  
Fig. 5 Remote Control Unit  
1 Operating Control Panel (Fig. 2)  
2 MANUAL AUTO button  
D SLEEP button  
E MASTER CONTROL button  
F SET TEMP./SET TIME buttons (  
G Signal Transmitter  
)
3 Remote Control Signal Receiver  
4 Indicator Lamps (Fig. 3)  
H TIMER button  
5 OPERATION Indicator Lamp (red)  
Lights when unit is operating.  
*The lamp will flash slowly when the de-  
frosting operation (see page 17).  
*The lamp will flash quickly (1 second on, 1  
second off) when the selected operating  
mode can not be used (see page 18).  
6 TIMER Indicator Lamp (green)  
If the TIMER indicator lamp flashes when  
the timer is operating, it indicates that a  
fault has occurred with the timer setting  
(see page 17 Auto Restart).  
I FAN CONTROL button  
J START/STOP button  
K AIR FLOW DIRECTION button  
L SWING LOUVER button  
M TIME ADJUST button  
N ACL button  
Rear side (Fig. 6)  
O TEST RUN  
Touch the two metal contacts with a me-  
tallic object to send the signal to perform  
a test run.  
7 SWING Indicator Lamp (orange)  
Perform a test run only when installing the  
air conditioner. If the signal to perform a  
test run is received during normal opera-  
tion, the air conditioners thermostat will  
malfunction.  
If the signal to perform a test run is re-  
ceived during normal operation, the unit  
will switch to the test operation mode and  
the indoor units OPERATION and TIMER  
indicator lamps will flash simultaneously.  
To stop the test operation mode, press the  
START/STOP button to stop the air condi-  
tioner.  
8 Intake Grille (Fig. 4)  
9 Air Filter  
0 Air Flow Direction Louver  
A Right-Left Louver  
(behind Air Flow Direction Louver)  
B Drain Hose  
C Air Cleaning Filter  
P Remote Control Unit Display (Fig. 7)  
Q Transmit Indicator  
R Clock Display  
S Operating Mode Display  
T Timer Mode Display  
U Fan Speed Display  
V Temperature Set Display  
W Timer Set Indicator  
X Temperature Set Indicator  
4
 
PREPARATION  
CAUTION!  
Turn on the Power  
Take care to prevent infants from  
accidentally swallowing batteries.  
When not using the remote control unit  
for an extended period, remove the  
batteries to avoid possible leakage and  
damage to the unit.  
If leaking battery fluid comes in contact  
with your skin, eyes, or mouth, immedi-  
ately wash with copious amounts of  
water, and consult your physician.  
Dead batteries should be removed  
quickly and disposed of properly, either  
by placing in a public battery collection  
receptacle, or by returning to appropri-  
ate authority.  
Turn on the circuit breaker.  
Load Batteries (R03/LR03 × 2)  
Press and slide the battery compartment lid on the re-  
verse side to open it.  
Slide in the direction of the arrow while pressing the  
1
mark.  
Insert batteries.  
Do not attempt to recharge dry batteries.  
2
3
Be sure to align the battery polarities (  
) correctly.  
Never mix new and used batteries, or  
batteries of different types.  
Close the battery compartment lid.  
Batteries should last about one year  
under normal use. If the remote control  
unit’s operating range becomes appre-  
ciably reduced, replace the batteries and  
press the ACL button with the tip of a  
ballpoint pen or other small object.  
Set the Current time  
Press the TIME ADJUST button (Fig. 6 M).  
1
2
Use the tip of a ball-point pen or other small object to press the button.  
Use the  
SET TIME buttons (Fig. 5 F) to adjust  
the clock to the current time.  
button: Press to advance the time.  
button: Press to reverse the time.  
(Each time the buttons are pressed, the time will be advanced/reversed in  
one-minute increments; hold the buttons depressed to change the time  
quickly in ten-minute increments.)  
Press the TIME ADJUST button again.  
This completes the time setting and starts the clock.  
3
To Use the Remote Control Unit  
The remote control unit must be pointed at signal receiver (Fig. 1 3) to operate  
correctly.  
Operating range: About 7 meters.  
When a signal is properly received by the air conditioner, a beeping sound will  
be heard.  
If no beep is heard, press the remote control unit button again.  
Remote Control Unit Holder  
Slide up  
Pull out  
Insert  
Press in  
Screws  
1
Mount the Holder.  
2
Set the Remote Control  
Unit.  
3
To remove the Remote  
Control Unit (when use at  
hand).  
5
 
OPERATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
To Select Mode Operation  
Press the START/STOP button (Fig. 5 J).  
1
The indoor unit’s OPERATION indicator lamp (red) (Fig. 3 5) will light.  
The air conditioner will start operating.  
Press the MASTER CONTROL button (Fig. 5 E) to se-  
2
lect the desired mode.  
Each time the button is pressed, the mode will change in the following  
order:  
s
AUTO  
s
s
COOL  
DRY  
t
t
*HEAT  
FAN  
About three seconds later, the entire display will reappear.  
Example: When set to COOL  
To Set the Thermostat  
Press the SET TEMP. buttons (Fig. 5 F).  
button: Press to raise the thermostat setting.  
button: Press to lower the thermostat setting.  
*Thermostat setting range: HEAT & COOL MODEL (REVERSE CYCLE)  
AUTO .................................. 18 to 30 °C  
Heating ............................... 16 to 30 °C  
Cooling/Dry ........................ 18 to 30 °C  
The thermostat cannot be used to set room temperature during the FAN mode  
(the temperature will not appear on the remote control units display).  
Thermostat setting range: COOLING MODEL  
AUTO .................................. Standard temperature setting 2 °C  
Cooling/Dry ........................ 18 to 30 °C  
Example: When set to 26 °C  
FAN ..................................... 17 to 30 °C  
(During use of FAN mode, if the thermostat is set at 17 °C or lower, the display will  
show ”--” and the fan will operate continuously, regardless of the room tempera-  
ture.)  
About three seconds later, the entire display will reappear.  
The thermostat setting should be considered a standard value, and may differ  
somewhat from the actual room temperature.  
To Set the Fan Speed  
Press the FAN CONTROL button (Fig. 5 I).  
Each time the button is pressed, the fan speed changes in the following order:  
s
AUTO  
s
HIGH  
s
s
s
MED  
LOW  
QUIET  
About three seconds later, the entire display will reappear.  
6
 
OPERATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
When set to AUTO:  
* Heating : Fan operates so as to optimally circulate warmed air.  
However, the fan will operate at very low speed when the temperature  
of the air issued from the indoor unit is low.  
Cooling : As the room temperature approaches that of the thermostat setting,  
the fan speed becomes slower.  
* Fan: HEAT & COOL MODEL (REVERSE CYCLE)  
The fan alternately turns on and off; when on, the fan runs at the low  
fan speed.  
The fan will operate at very low setting during Monitor operation and  
at the start of the Heating mode.  
Fan: COOLING MODEL  
The fan will operate at the optimum speed in accordance with the  
room temperature in the vicinity of the indoor unit.  
Example: When set to AUTO  
When set to QUIET:  
SUPER QUIET operation begins. The indoor unit’s airflow will be reduced for qui-  
eter operation.  
SUPER QUIET operation cannot be used during Dry mode. (The same is true  
when dry mode is selected during AUTO mode operation.)  
During Super Quiet operation, *(Heating and) Cooling performance will be re-  
duced somewhat.  
To Stop Operation  
Press the START/STOP button.  
The OPERATION indicator lamp (red) (Fig. 3 5) will go out.  
Example: When set to QUIET  
About Mode Operation  
*AUTO (AUTO CHANGEOVER): HEAT & COOL MODEL (REVERSE CYCLE)  
When AUTO CHANGEOVER operation is selected, the air conditioner selects the  
appropriate operation mode (Cooling or Heating) in response to your rooms  
temperature.  
When AUTO CHANGEOVER operation first selected, the fan will operate at very  
low speed for about one minute, during which time the unit detects the room  
conditions and selects the proper operating mode.  
When the air conditioner has adjusted your rooms temperature to near the ther-  
mostat setting, it will begin monitor operation. In the monitor operation mode,  
the fan will operate at low speed. If the room temperature subsequently changes,  
the air conditioner will once again select the appropriate operation (Heating, Cool-  
ing) to adjust the temperature to the value set in the thermostat. (The monitor  
operation range is 2 °C relative to the thermostat setting.)  
If the mode automatically selected by the unit is not what you wish, see page 6  
and select one of the mode operation (HEAT, COOL, DRY, FAN).  
7
 
AUTO: COOLING MODEL  
Depending on the room temperature at the time operation begins, the operating  
mode will be switched automatically as shown in the accompanying table.  
Also, depending on the operating mode, the room temperature setting will cause  
the “standard” temperature to be set as shown.  
Actual Room  
Operating Mode  
Thermostat Setting  
Temperature  
30 °C or above   
27 to 30 °C  
25 to 27 °C  
23 to 25 °C  
Below 23 °C  
(standard setting)  
27 °C  
Cooling  
Cooling  
Dry  
Dry  
Dry  
26 °C  
24 °C  
22 °C  
20 °C  
The operating mode and standard thermostat settings are selected automatically  
when operation begins.  
When automatic operation is initiated, the fan will run at very low speed for about  
one minute while the unit detects and selects the proper operating mode.  
Once the operating mode has been set, the mode will not change even if the  
room temperature changes.  
If the START/STOP button is pressed to recommence operation within two hours  
after stopping automatic operation, the unit will begin operating from the same  
mode as before.  
*Heating:  
Use to warm your room.  
When Heating mode is selected, the air conditioner will operate at very low fan  
speed for about 3 to 5 minutes, after which it will switch to the selected fan set-  
ting. This period of time is provided to allow the indoor unit to warm up before  
beginning full operation.  
* During Heating mode:  
Set the thermostat to a temperature set-  
ting that is higher than the current room  
temperature. The Heating mode will not  
operate if the thermostat is set lower than  
the actual room temperature.  
When the room temperature is very low, frost may form on the outside unit, and  
its performance may be reduced. In order to remove such frost, the unit will  
automatically enter the defrost cycle from time to time. During Automatic De-  
frosting operation, the OPERATION indicator lamp (red) will flash, and the heat  
operation will be interrupted.  
During Cooling/Dry mode:  
Set the thermostat to a temperature set-  
ting that is lower than the current room  
temperature. The Cooling and Dry modes  
will not operate if the thermostat is set  
higher than the actual room temperature  
(in Cooling mode, the fan alone will oper-  
ate).  
Cooling:  
Use to cool your room.  
*During Fan mode:  
HEAT & COOL MODEL (REVERSE CYCLE)  
You can not use the unit to heat and cool  
your room.  
Dry:  
Use for gently cooling while dehumidifying your room.  
You cannot heat the room during Dry mode.  
During Fan mode: COOLING MODEL  
Fan operation begins when room tem-  
perature in the vicinity of the air condi-  
tioner rises above the set thermostat  
temperature; when the temperature  
drops, fan operation stops.  
During Dry mode, the unit will operate at low speed; in order to adjust room  
humidity, the indoor unit’s fan may stop from time to time. Also, the fan may  
operate at very low speed when detecting room humidity.  
The fan speed cannot be changed manually when Dry mode has been selected.  
If the air emitted feels too cool, raise  
the thermostat setting.  
Fan:  
Use to circulate the air throughout your room.  
8
 
TIMER OPERATION  
Before using the timer function, be sure that the Remote Control Unit is set to the correct current time (see page 5).  
To Use the ON timer or OFF timer  
To Cancel the Timer  
Press the START/STOP button (Fig. 5 J)  
(if the unit is already operating, proceed to step 2).  
The indoor unit’s OPERATION indicator lamp (red) (Fig. 3 5) will light.  
Use the TIMER button to select “TIMER  
RESET”.  
The air conditioner will return to normal  
operation.  
1
To Change the Timer Settings  
Press the TIMER button (Fig. 5 H) to select the OFF  
timer or ON timer operation.  
Each time the button is pressed the timer function changes in the follow-  
2
Perform steps 2 and 3.  
To Stop Air Conditioner Operation  
while the Timer is Operating  
ing order:  
Press the START/STOP button.  
s
s
s
RESET  
OFF  
ON  
PROGRAM(OFF ON, OFF ON) t  
To Change Operating Conditions  
If you wish to change the operating  
conditions (Mode, Fan Speed, Thermostat  
Setting), after making the timer setting,  
wait until the entire display reappears, then  
press the appropriate buttons to change  
the operating condition desired.  
The indoor unit’s TIMER indicator lamp (green) (Fig. 3 6) will light.  
Use the SET TIME buttons (Fig. 5 F) to adjust the de-  
sired OFF time or ON time.  
Set the time while the time display is flashing (the flashing will continue  
for about five seconds).  
3
button: Press to advance the time.  
button: Press to reverse the time.  
About five seconds later, the entire display will reappear.  
To Use the PROGRAM timer  
To Cancel the Timer  
Press the START/STOP button (Fig. 5 J)  
(if the unit is already operating, proceed to step 2).  
The indoor unit’s OPERATION indicator lamp (red) (Fig. 3 5) will light.  
Use the TIMER button to select “TIMER  
RESET”.  
The air conditioner will return to normal  
operation.  
1
To Change the Timer Settings  
Set the desired times for OFF timer and ON timer.  
1. Follow the instructions given in the section  
“To Use the ON Timer or OFF Timer” to se-  
lect the timer setting you wish to change.  
2
See the section “To Use the ON timer or OFF timer” to set the desired  
mode and times.  
About three seconds later, the entire display will reappear.  
The indoor unit’s TIMER indicator lamp (green) (Fig. 3 6) will light.  
2. Press the TIMER button to select either  
OFF ON or OFF ON.  
Press the TIMER button (Fig. 5 H) to select the PRO-  
GRAM timer operation (either OFF ON or OFF ON  
To Stop Air Conditioner Operation  
while the Timer is Operating  
3
Press the START/STOP button.  
will display).  
To Change Operating Conditions  
The display will alternately show “OFF timer” and “ON timer”, then change  
to show the time setting for the operation to occur first.  
If you wish to change operating conditions  
(Mode, Fan Speed, Thermostat Setting),  
after making the timer setting wait until the  
entire display reappears, then press the  
appropriate buttons to change the operat-  
ing condition desired.  
The PROGRAM timer will begin operation. (If the ON timer has been  
selected to operate first, the unit will stop operating at this point.)  
About five seconds later, the entire display will reappear.  
About the PROGRAM timer  
The PROGRAM timer allows you to integrate OFF timer and ON timer operations  
in a single sequence. The sequence can involve one transition from OFF timer to  
ON timer, or from ON timer to OFF timer, within a twenty-four hour period.  
The first timer function to operate will be the one set nearest to the current time.  
The order of operation is indicated by the arrow in the Remote Control Unit’s  
display (OFF ON, or OFF ON).  
One example of PROGRAM timer use might be to have the air conditioner auto-  
matically stop (OFF timer) after you go to sleep, then start (ON timer) automati-  
cally in the morning before you arise.  
9
 
SLEEP TIMER OPERATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Unlike other timer functions, the SLEEP timer is used to set the length of time until air conditioner operate is stopped.  
To Use the SLEEP timer  
To Cancel the Timer:  
While the air conditioner is operating or stopped, press the  
SLEEP button (Fig. 5 D).  
Both the indoor unit’s OPERATION indicator lamp (red) (Fig. 3 5) and the TIMER  
Use the TIMER button to select “TIMER  
RESET”.  
The air conditioner will return to normal  
operation.  
indicator lamp (green) (Fig. 3 6) will light.  
To Stop the Air Conditioner During  
Timer Operation:  
To Change the Timer Settings  
Press the START/STOP button.  
Press the SLEEP button (Fig. 5 D) once again and set the time  
using the SET TIME buttons (Fig. 5 F).  
Set the time while the Timer Mode Display is flashing (the flashing will continue for  
about five seconds).  
button: Press to advance the time.  
button: Press to reverse the time.  
About five seconds later, the entire display will reappear.  
About the SLEEP timer  
To prevent excessive warming or cooling during sleep, the SLEEP timer function automatically modifies the thermostat set-  
ting in accordance with the time setting. When the set time has elapsed, the air conditioner completely stops.  
*During Heating operation:  
During Cooling/Dry operation:  
When the SLEEP timer is set, the thermostat setting is  
automatically lowered 1 °C every thirty minutes. When the  
thermostat has been lowered a total of 4 °C, the thermostat  
setting at that time is maintained until the set time has elapsed,  
at which time the air conditioner automatically turns off.  
When the SLEEP timer is set, the thermostat setting is auto-  
matically raised 1 °C every sixty minutes. When the thermo-  
stat has been raised a total of 2 °C, the thermostat setting at  
that time is maintained until the set time has elapsed, at which  
time the air conditioner automatically turns off.  
SLEEP timer setting  
SLEEP timer setting  
Set time  
1 °C  
2 °C  
3 °C  
4 °C  
30  
minutes  
1 hour  
1 hour  
2 °C  
1 °C  
1 hour  
30 minutes  
Set time  
10  
 
ADJUSTING THE DIRECTION OF AIR CIRCULATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Vertical (up-down) direction of airflow is adjusted by pressing the Remote Control Unit’s AIR FLOW DIRECTION button. Hori-  
zontal (right-left) airflow direction is adjusted manually, by moving the Air Flow Direction Louvers.  
Whenever making horizontal airflow adjustments, start air conditioner operation and be sure that the vertical air direction  
louvers are stopped.  
DANGER!  
Vertical Air Direction Adjustment  
Never place fingers or foreign objects inside  
the outlet ports, since the internal fan oper-  
ates at high speed and could cause personal  
injury.  
Press the AIR FLOW DIRECTION button (Fig. 5 K).  
Each time the button is pressed, the air direction range will change as follows:  
3
2
1
6
5
4
Always use the remote control unit’s  
AIR FLOW DIRECTION button to adjust  
the vertical airflow louvers. Attempting  
to move them manually could result in  
improper operation; in this case, stop  
operation and restart. The louvers  
should begin to operate properly again.  
Types of Air flow Direction Setting:  
1, 2, 3  
4, 5, 6  
:
:
During Cooling/Dry modes  
During Heating mode  
1
The remote Control Units display does  
not change.  
2
During use of the Cooling and Dry  
modes, do not set the Air Flow Direc-  
tion Louvers in the Heating range (4 -  
6) for long periods of time, since wa-  
ter vapor may condense near the out-  
let louvers and drops of water may drip  
from the air conditioner. During the  
Cooling and Dry modes, if the Air Flow  
Direction Louvers are left in the heat-  
ing range for more than 30 minutes,  
they will automatically return to posi-  
tion 3.  
3
4
5
6
Use the air direction adjustments within the ranges shown above.  
The vertical airflow direction is set automatically as shown, in accordance with  
the type of operation selected.  
During Cooling/Dry modes : Horizontal flow 1  
When used in a room with infants, chil-  
dren, elderly or sick persons, the air  
direction and room temperature  
should be considered carefully when  
making settings.  
* During Heating mode  
: Downward flow 5  
During AUTO mode operation, for the first minute after beginning operation,  
airflow will be horizontal 1; the air direction cannot be adjusted during this pe-  
riod.  
Right-Left Adjustment  
Adjust the Right-Left louvers.  
Move the Right-Left louvers to adjust air flow in the direction you prefer.  
Right-Left Louvers  
knob  
11  
 
SWING OPERATION  
Begin air conditioner operation before performing this procedure.  
To select SWING Operation  
Press the SWING LOUVER button (Fig. 5 L).  
The SWING indicator lamp (orange) (Fig. 3 7) will light.  
In this mode, the Air Flow Direction Louvers will swing automatically to direct the  
airflow both up and down.  
To Stop SWING Operation  
Press the SWING LOUVER button (Fig. 5 L) once again.  
The SWING indicator lamp (orange) (Fig. 3 7) will go out.  
Airflow direction will return to the setting before swing was begun.  
About Swing Operation  
The range of swing is relative to the currently set airflow  
During Cooling/Dry modes, if SWING Operation is con-  
direction.  
tinued at the lowest (downward) range for more than 30  
minutes, the unit will automatically switch the swing range  
to the horizontal flow range to prevent the condensation  
of moisture on the outlet.  
If the swing range is not as desired, use the Remote Con-  
trol Units AIR FLOW DIRECTION button to change the  
range of swing.  
The SWING operation may stop temporarily when the air  
conditioners fan is not operating, or when operating at  
very low speeds.  
MANUAL AUTO OPERATION  
Use the MANUAL AUTO operation in the event the Remote Control Unit is lost or otherwise unavailable.  
How To Use the Main Unit Controls  
Press the MANUAL AUTO button (Fig. 2 2) on the main unit  
control panel.  
To stop operation, press the MANUAL AUTO button once again.  
(Controls are located inside the intake grille.)  
When the air conditioner is operated  
with the controls on the Main unit, it  
will operate under the same mode as  
the AUTO mode selected on the Re-  
mote Control Unit (see page 7).  
The fan speed selected will be “AUTO”  
and the thermostat setting will be  
standard.  
12  
 
CLEANING AND CARE  
Before cleaning the air conditioner, be sure to turn it off and disconnect the power supply cord.  
CAUTION!  
Be sure the intake grille (Fig. 1 8) is installed securely.  
When removing and replacing the air filters, be sure not to touch the heat exchanger, as personal  
injury may result.  
Cleaning the Intake Grille  
1. Remove the intake grille.  
Cleaning the Air Filter  
1. Open the intake grille, and remove the air  
filter.  
1 Place your fingers at both lower ends of the grille  
panel, and lift forward; if the grille seems to catch  
partway through its movement, continue lifting up-  
ward to remove.  
2 Pull past the intermediate catch and open the Intake  
Grille wide so that it become horizontal.  
Lift up the air filters handle, disconnect the two lower  
tabs, and pull out.  
Air filter handle  
Intake Grille  
2
2
Hooks (two places)  
1
1
2. Remove dust with a vacuum cleaner or by  
Intake Grille  
washing.  
After washing, allow to dry thoroughly in a shaded place.  
Mounting  
shaft  
3. Replace the air filter and close the intake  
grille.  
Knob  
1 Align the sides of the air filter with the panel, and push  
in fully, making sure the two lower tabs are returned  
properly to their holes in the panel.  
2. Clean with water.  
Remove dust with a vacuum cleaner; wipe the unit with  
warm water, then dry with a clean, soft cloth.  
3. Replace the intake grille.  
1 Pull the knobs all the way.  
2 Hold the grille horizontal and set the left and right  
mounting shafts into the bearings at the top of the  
panel.  
Hooks (two places)  
2 Close the intake grille.  
(For purposes of example, the illustration shows the unit  
without intake grille installed.)  
Mounting shaft  
2
1
Bearing  
Knob  
Intake Grille  
Dust can be cleaned from the air filter either with a vacuum  
cleaner, or by washing the filter in a solution of mild de-  
tergent and warm water. If you wash the filter, be sure to  
allow it to dry thoroughly in a shady place before rein-  
stalling.  
Intake Grille  
If dirt is allowed to accumulate on the air filter, air flow  
will be reduced, lowering operating efficiency and increas-  
ing noise.  
Mounting  
shaft  
During periods of normal use, the air filters should be  
cleaned every two weeks.  
Knob  
13  
 
Air Cleaning Filter Installation  
1. Open the intake grille and remove the air  
filters.  
3. Install the two air filters and close the  
intake grille.  
Mounting shaft  
Intake Grille  
2
Bearing  
1
2
2
Intake Grille  
Knob  
1
1
Intake Grille  
Intake Grille  
Mounting  
shaft  
Mounting  
shaft  
Knob  
Knob  
Intake Grille  
1
1
2
2
When air cleaning filters are used, the effect will increased  
by setting the fan speed to “High”.  
2. Install the air cleaning filter set (set of 2).  
1 Set the air cleaning filter into the air cleaning filter  
frame.  
Air cleaning filter set  
Air cleaning filter frame  
Air cleaning filter  
2 Engage the latch at both ends of the filter with the two  
hooks at the rear of the air cleaning filter frame.  
Hooks (two places at the rear)  
Latches (two places)  
Take care that the air cleaning filter does not project be-  
yond the frame.  
3 Engage the four fixing locations at the top and bot-  
tom of the air cleaning filter frame with the hooks of  
the air filter.  
Rear of the filter  
Fixing location, hooks (four places)  
14  
 
CLEANING AND CARE  
Replacing dirty Air cleaning filters  
Please purchase the separately sold replacement air clean-  
ing filters and install them.  
In regard to the Air cleaning filters  
(The air cleaning filter type differs depending  
on the model.)  
1. Open the intake grille and remove the air  
filters.  
[AIR-PURIFYING FILTER (green filter)]  
Depending on the size of the room and the conditions in  
which the air conditioner is used, the normal life of the  
air-purifying filter is about three months. If the air-purify-  
ing filter becomes dirty within three months, replace it as  
soon as possible. (Always dispose of used air-purifying  
filters, do not reuse them.)  
Intake Grille  
2
2
1
1
[DEODORIZING FILTER (black filter)]  
To regenerate the deodorizing effect, remove the dust with  
a vacuum cleaner and place the filter in direct sunlight  
for six hours about once every six months. Under normal  
conditions, the filter should be replaced after three years.  
Intake Grille  
Mounting  
shaft  
For storage of the air cleaning filters, avoid places with  
high temperatures and high humidity, and use the filters  
as soon as possible after the package has been opened.  
(The air cleaning effect decreases when the filters are left  
in the opened package.)  
Knob  
[POLYPHENOL CATECHIN AIR CLEANING FILTER (white filter)]  
The Air Cleaning Filters are disposable filters. (They can  
not be washed and reused.)  
For storage of the Air Cleaning Filters, use the filters as  
soon as possible after the package has been opened.  
(The air cleaning effect decreases when the filters are left  
in the opened package)  
2. Replace them by two new air cleaning  
filters.  
Generally, the filters should be exchanged about every  
three months.  
1 Remove the old air cleaning filters in reverse order of  
their installation.  
Please buy delicated air cleaning filters (UTR-FC04-1) (Sold  
separately) to exchange the used dirty air cleaning filters.  
2 Install in the same way as for installation of the air  
[NEGATIVE AIR IONS DEODORIZING FILTER (light green  
filter)]  
The filters should be exchanged about every three years  
so as to maintain the deodorizing effect.  
cleaning filter set.  
3. Install the two air filters and close the  
intake grille.  
Filter frame is not a one-off product.  
Mounting shaft  
Please buy delicated deodorizing filter (UTR-FC04-3) (Sold  
separately) when exchanging the filters.  
2
1
Bearing  
Knob  
Intake Grille  
Maintenance of Deodorizing Filters  
In order to maintain the deodorizing effect, please clean the  
filter in the follow way once three months.  
1 Remove the deodorizing filter.  
2 Clean with water and dry in the air.  
1) Flush the filters with high-pressure hot water until  
the surface of the filters are covered with water.  
Please flush with diluent neutral detergent.  
Never wash by reaming or rubbing, otherwise it  
will damage the deodorizing effect.  
Intake Grille  
Mounting  
shaft  
Knob  
2) Rinse with water flow.  
3) Dry in shade.  
3 Reinstall the deodorizing filter.  
Intake Grille  
1
1
2
2
15  
 
TROUBLESHOOTING  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the  
WARNING!  
Power Supply Plug or turn off the circuit breaker, and consult authorized service personnel.  
Merely turning off the units power switch will not completely disconnect the unit from the power  
source. Always be sure to turn off your circuit breaker to ensure that power is completely off.  
Before requesting service, perform the following checks:  
Symptom  
Problem  
See page  
NORMAL  
FUNCTION  
Doesn’t operate immedi-  
ately:  
If the unit is stopped and then immediately started again, the com-  
pressor will not operate for about 3 minutes, in order to prevent  
fuse blowouts.  
Whenever the power supply plug is disconnected and then recon-  
nected to a power outlet, the protection circuit will operate for about  
3 minutes, preventing unit operation during that period.  
Noise is heard:  
During operation and immediately after stopping the unit, the  
sound of water flowing in the air conditioners piping may be  
heard. Also, noise may be particularly noticeable for about 2 to 3  
minutes after starting operation (sound of coolant flowing).  
During operation, a slight squeaking sound may be heard. This is  
the result of minute expansion and contraction of the front cover  
due to temperature changes.  
*During Heating operation, a sizzling sound may be heard occa-  
sionally.This sound is produced by the Automatic Defrosting op-  
eration.  
17  
Smells:  
Some smell may be emitted from the indoor unit. This smell is  
the result of room smells (furniture, tobacco, etc.) which have  
been taken into the air conditioner.  
Mist or steam are  
emitted:  
During Cooling or Dry operation, a thin mist may be seen emitted  
from the indoor unit. This results from the sudden Cooling of  
room air by the air emitted from the air conditioner, resulting in  
condensation and misting.  
*During Heating operation, the outdoor units fan may stop, and  
steam may be seen rising from the unit. This is due to the Auto-  
matic Defrosting operation.  
17  
Airflow is weak or stops: *When Heating operation is started, fan speed is temporarily very  
low, to allow internal parts to warm up.  
*During Heating operation, if the room temperature rises above  
the thermostat setting, the outdoor unit will stop, and the indoor  
unit will operate at very low fan speed. If you wish to warm the  
room further, set the thermostat to a higher setting.  
*During Heating operation, the unit will temporarily stop opera-  
tion (between 7 and 15 minutes) as the Automatic Defrosting mode  
operates. During the Automatic Defrosting operation, the OPERA-  
TION indicator lamp will flash.  
17  
7
The fan may operate at very low speed during Dry operation or  
when the unit is monitoring the rooms temperature.  
7
7
During SUPER QUIET operation, the fan will operate at very low speed.  
In the monitor AUTO operation, the fan will operate at very low speed.  
*In case of Multi-type unit, if multiple units are operated in different  
operation modes as shown below, the units operated afterward will  
stop and the OPERATION indicator lamp (red) will flash.  
Heating mode and cooling mode (or dry mode)  
18  
17  
Heating mode and fan mode  
Water is produced from  
the outdoor unit:  
*During Heating operation, water may be produced from the out-  
door unit due to the Automatic Defrosting operation.  
16  
 
TROUBLESHOOTING  
Symptom  
Items to check  
See page  
CHECK ONCE Doesn’t operate at all:  
MORE  
Has the circuit breaker been turn off?  
9
Has there been a power failure?  
Has a fuse blown out, or a circuit breaker been tripped?  
Is the timer operating?  
Poor Cooling (or *Heating)  
performance:  
Is the air filter dirty?  
Are the air conditioners intake grille or outlet port blocked?  
Did you adjust the room temperature settings (thermostat) cor-  
rectly?  
Is there a window or door open?  
In the case of Cooling operation, is a window allowing bright sun-  
light to enter? (Close the curtains.)  
In the case of Cooling operation, are there heating apparatus and  
computers inside the room, or are there too many people in the  
room?  
Is the unit set for SUPER QUIET operation?  
7
5
The unit operates  
differently from the  
remote control units  
setting:  
Are the Remote Control Units batteries dead?  
Are the Remote Control Units batteries loaded properly?  
If the problem persists after performing these checks, or if you notice burning smells, or the TIMER indicator Lamp (Fig. 3 6)  
flashes, immediately stop operation, turn off the circuit breaker, and consult authorized service personnel.  
OPERATING TIPS  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Operation and Performance  
*Heating Performance  
*Microcomputer-controlled Automatic Defrosting  
This air conditioner operates on the heat-pump principle,  
absorbing heat from outdoor air and transferring that heat  
indoors. As a result, the operating performance is reduced  
as outdoor air temperature drops. If you feel that insuffi-  
cient heating performance is being produced, we recom-  
mend you use this air conditioner in conjunction with  
another kind of heating appliance.  
Heat-pump air conditioners heat your entire room by  
recirculating air throughout the room, with the result that  
some time may be required after first starting the air con-  
ditioner until the room is heated.  
When using the Heating mode under conditions of low  
outdoor air temperature high humidity, frost may form  
on the outdoor unit, resulting in reduced operating per-  
formance.  
In order to prevent this kind of reduced performance, this  
unit is equipped with a Microcomputer-controlled Auto-  
matic Defrosting function. If frost forms, the air condi-  
tioner will temporarily stop, and the defrosting circuit will  
operate briefly (for about 7 to 15 minutes).  
During Automatic Defrosting operation, the OPERATION  
indicator lamp (red) will flash slowly.  
*When Indoor and Outdoor Temperatures are High  
When both indoor and outdoor temperatures are high dur-  
ing use of the heating mode, the outdoor units fan may stop  
at times.  
AUTO Restart  
In Event of Power Interruption  
If a power failure occurs during TIMER operation, the timer  
will be reset and the unit will begin (or stop) operation at  
the new time setting. In the event that this kind of timer  
fault occurs the TIMER Indicator Lamp (green) will flash  
(see page 4).  
The air conditioner power has been interrupted by a  
power failure. The air conditioner will then restart auto-  
matically in its previous mode when the power is restored.  
Operated by setting before the power failure.  
Use of other electrical appliances (electric shaver, etc.) or  
nearby use of a wireless radio transmitter may cause the  
air conditioner to malfunction. In this event, temporarily  
disconnect the Power Supply Plug, reconnect it, and then  
use the remote control unit to resume operation.  
17  
 
OPERATING TIPS  
Multi-type Air conditioner  
This indoor unit can be connected to a multi-type outdoor unit. The multi-type air conditioner allows multiple indoor units to  
be operated in multiple locations. The indoor units may be operated simultaneously, in accordance with their respective  
output.  
Simultaneous Use of Multiple Units  
Instructions relating to inverter ( ) are applicable only to “INVERTER MODEL”.  
Operation can be done in the following different operat-  
When using a multi-type air conditioner, the multiple  
indoor units can be operated simultaneously, but when  
two or more indoor units of the same group are oper-  
ated simultaneously, the heating and cooling efficiency  
will be less than when a single indoor unit is used alone.  
Accordingly, when you wish to use more than one in-  
door unit for cooling at the same time, the use should  
be concentrated at night and other times when less out-  
put is required. In the same way, when multiple units  
are used simultaneously for heating, it is recommended  
that they be used in conjunction with other auxiliary  
space heaters, as required.  
ing modes.  
Cooling mode and dry mode  
Cooling mode and fan mode  
Dry mode and fan mode  
The operating mode (heating mode or cooling (dry)  
mode) of the outdoor unit will be determined by the op-  
erating mode of the indoor unit that was operated first.  
If the indoor unit was started in fan mode, the operating  
mode of the outdoor unit will not be determined.  
For example, if indoor unit (A) was started in fan mode  
and then indoor unit (B) was then operated in heating  
mode, indoor unit (A) would temporarily start opera-  
tion in fan mode but when indoor unit (B) started oper-  
ating in heating mode, the OPERATION indicator lamp  
(red) for indoor unit (A) would begin to flash (1 second  
on, 1 second off) and it would go into standby mode.  
Indoor unit (B) would continue to operate in heating  
mode.  
Seasonal and outdoor temperature conditions, the struc-  
ture of the rooms and the number of persons present  
may also result in differences of operating efficiency.  
We recommend that you try various operating patterns  
in order to confirm the level of heating and cooling out-  
put provided by your units, and use the units in the way  
that best matches your family's lifestyle.  
If you discover that one or more units delivers a low  
level of cooling or heating during simultaneous opera-  
tion, we recommend that you stop simultaneous opera-  
tion of the multiple units.  
Operation cannot be done in the following different op-  
erating modes.  
If the indoor unit is instructed to do an operating mode  
that it cannot perform, the OPERATION indicator lamp  
(red) on the indoor unit will flash (1 second on, 1 sec-  
ond off) and the unit will go into the standby mode.  
Heating mode and cooling mode (or dry mode)  
Heating mode and fan mode  
Notice  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
*During use of the heating mode, the outdoor unit will  
occasionally commence the defrost operation for brief  
periods. During the defrosting operation, if the user sets  
the indoor unit for heating again, the defrosting mode  
will continue, and the heating operation will begin after  
completion of defrosting, with the result that some time  
may be required before warm air is emitted.  
*During use of the heating mode, the top of the indoor  
unit may become warm, but this is due to the fact that  
coolant is circulated through the indoor unit even when  
it is stopped; it is not a malfunction.  
18  
 
OPERATING TIPS  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Temperature and Humidity Range  
Permissible ranges of temperature and humidity are as follows:  
Indoor  
Outdoor  
Temperature  
Temperature  
Humidity  
About 80 % or less  
COOLING OPERATION  
*HEATING OPERATION  
About 0 to 46 °C  
About 18 to 32 °C  
About 30 °C or less  
If the unit is used for long peri-  
ods under high-humidity condi-  
tions, condensation may form  
on the surface of the indoor  
unit, and drip onto the floor or  
other objects underneath.  
About –10 to 24 °C  
Acoustic Noise Information: The maximum sound pressure level is less than 70 dB (A) for both indoor unit and outdoor  
unit. According to IEC 704-1 and ISO 3744.  
If the air conditioner is operated under higher temperature conditions than those listed, the built-in protection circuit may  
operate to prevent internal circuit damage. Also, during Cooling and Dry modes, if the unit is used under conditions of  
lower temperatures than those listed above, the heat-exchanger may freeze, leading to water leakage and other damage.  
Do not use this unit for any purposes other than the Cooling, ( )Heating, Dehumidifying, and air-circulation of rooms in  
*
ordinary dwellings.  
When the outdoor temperature drops, the outdoor units fans may switch to Low Speed.  
If the unit is used for long periods under high-humidity conditions, condensation may form on the surface of the indoor  
unit, and drip onto the floor or other objects underneath. (About 80% or more)  
1
 

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