Fujitsu Air Conditioner AOU18RC User Manual

OPE R ATING MANUAL  
OPERATING MANUAL  
AIR CONDITIONER  
CAS S ETTE TYPE  
Indoor Unit  
AUU18RC  
AUU24RC  
AUU36RC  
AUU42RC  
Outdoor Unit  
AOU18RC  
AOU24RC  
AOU36RC  
AOU42RC  
KEEP THIS OPERATION MANUAL  
FOR FUTURE REFERENCE.  
P/N9368987022  
FUJ ITS U GE NE R AL LIMITE D  
 
NAME OF PARTS  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Fig. 1  
Fig. 2  
Electrical Breaker  
Fig. 3  
1
2
3
This breaker is installed during  
the electrical installation.  
M
Fig. 4  
I
J
K
N
O
P
Q
R
AM  
CLOCK  
NON STOP  
AUTO  
°F  
AMPM CLOCK  
NON STOP  
OFFON  
TIMER  
WEEKLY  
AUTO  
AUTO  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
OFF  
ON  
L
H
COOL  
°F  
MASTER  
CONTROL  
AMPM TIMER  
NEXT DAY  
DAY  
DAY OFF  
DEFROST TEST  
FAN  
HEAT  
ON  
OFF  
CLOCK ADJUST  
G
1
2
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
S T  
Fig. 5 Display  
F
D
B 8 6  
0
C A 9 7  
For explanatory purposes, the figure showing the remote  
controller display shows all possible displays. The actual  
display shows only that area that is being adjusted or used.  
E
Fig. 4 Remote Controller  
Fig. 1 Indoor Unit  
1 Air Filter  
6 START/STOP Button  
7 Operation Lamp  
K FAN CONTROL Button  
2 Air Intake Grille  
L MASTER CONTROL Button  
3 Air Flow Direction  
8 ENERGY SAVE Button  
9 DAY OFF Button  
M Remote Controller Display  
Flaps  
(Fig. 5)  
0 ENERGY SAVE Lamp  
A ZONE Control Button  
B SET Button  
N Timer Mode Display  
Fig. 2 Outdoor Unit  
O Clock Display (CLOCK/TIMER)  
P Set Temperature Display  
4 Air intake  
5 Air outlet  
C ZONE Control Lamp  
(TEMP.)  
D AIR FLOW DIRECTION SWING  
Q Fan Speed Display  
R Operation Mode Display  
S DEFROST Display  
T TEST Display  
Button  
E AIR FLOW DIRECTION SWING  
Lamp  
F AIR FLOW DIRECTION SET Button  
G CLOCK ADJUST Button  
H TIMER MODE Button  
I SET TIME Button  
J TEMP./DAY Button  
En-2  
 
PREPARATION  
Set the Current Time and Day  
Press the CLOCK ADJUST button for more than three  
seconds.  
AM  
CLOCK  
1
DAY  
Press the TEMP./DAY button and set the day.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
2
MASTER  
: Use to advance the day forward.  
CONTROL  
: Use to turn the day back.  
The day is indicated by a code number from 1 to 7, as shown in the table  
below. Set to the number that corresponds to the current day.  
CLOCK ADJT  
NE  
AVE  
START/STOP  
F  
2
3
1
DAY CODE  
1
2
3
4
5
6
7
DAY OF THE WEEK MON TUE WED THU  
FRI  
SAT SUN  
Press the SET TIME button and set the time.  
: Use to advance the time forward.  
: Use to turn the time back.  
(Press once to move the time 1 minute; hold down and the time will move  
10 minutes at a time.)  
3
4
Press the CLOCK ADJUST button again.  
This registers the new day and time values. The day display goes off, and  
the time display stops flashing.  
AM  
CLOCK  
Example: Set the time to 9:31.  
OPERATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
To Select Mode Operation  
AM  
CLOCK  
NON STOP  
AUTO  
°F  
Press the START/STOP button.  
The unit will start and the remote controller’s operation lamp (green) will  
light up.  
1
2
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTRO
Press the MASTER CONTROL button to select the de-  
sired mode.  
CLOCK ADJUST  
2
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
s
AUTO  
s
*HEAT  
t
t
FAN  
COOL  
1
Example: When set to AUTO  
To Set the Thermostat  
Press the TEMP./DAY button to the desired temperature.  
: Press to raise the thermostat setting.  
AM  
CLOCK  
NON STOP  
AUTO  
°F  
: Press to lower the thermostat setting.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
Thermostat setting range:  
MASTER  
CONTROL  
AUTO ......................................64 to 88 °F  
* Heating ...................................60 to 88 °F  
CLOCK ADJUST  
Cooling/Dry ............................64 to 88 °F  
The thermostat cannot be used to set room temperature during the FAN mode  
(the temperature will not appear on the remote controller’s display).  
ZONE  
SET  
DAOFF  
START/STOP  
Example: When set to 84 °F  
The thermostat setting should be considered a standard value, and may  
differ somewhat from the actual room temperature.  
En-3  
 
OPERATION  
Instructions relating to heating(*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
To Set the Fan Speed  
Press the FAN CONTROL button to select the fan speed.  
AM  
CLOCK  
NON STOP  
AUTO  
°F  
sAUTO  
sHIGH  
sMED  
sLOW  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
When set to AUTO:  
MASTER  
CONTROL  
* Heating : Fan operates so as to optimally circulate warmed air.  
However, the fan will operate at very low speed when the tem-  
perature of the air issued from the indoor unit is low.  
Cooling : As the room temperature approaches that of the thermostat set-  
ting, the fan speed becomes slower.  
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAV
DAY OFF  
TOP  
Fan  
: The fan alternately turns on and off; when on, the fan runs at the  
Example: When set to HIGH  
low fan speed.  
The fan will operate at a very low setting during Monitor operation.  
: HIGH  
: MED  
: LOW  
To Stop Operation  
Press the START/STOP button.  
The remote controller’s operation lamp (green) will go out.  
The display contents disappear and only the current time is displayed.  
About Mode Operation  
AUTO:  
COOLING MODEL  
Cooling Operation  
Dry Operation  
When the room temperature is 4 °F higher than the set temperature, the mode  
will switch between Cooling and Drying.  
Thermostat control  
During the Drying mode operation, the FAN setting should be switched to LOW  
for a gently cooling effect during which the fan may temporarily stop rotating.  
If the mode automatically selected by the unit is not satisfactory, see page 3 for  
4 °F  
instructions on changing the mode setting (COOL, FAN).  
Setting temperature  
AUTO (* AUTO CHANGEOVER):  
HEAT & COOL MODEL (Reverse cycle)  
When AUTO CHANGEOVER is selected, the air conditioner selects the appropriate operation mode (Cooling or Heating)  
according to your room’s present temperature.  
When AUTO CHANGEOVER is first selected, the fan will operate at very low speed for about one minute while the unit  
determines the current conditions of the room and accordingly selects the proper operation mode.  
When the air conditioner has adjusted your room’s temperature to near the thermostat setting, it will begin monitor opera-  
tion. 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, Cooling) to adjust the temperature to the value set  
in the thermostat. (The monitor operation range is 4 °F relative to the thermostat setting.)  
If the mode automatically selected by the unit is not satisfactory, see page 3 for instructions on changing the mode setting  
(HEAT, COOL, FAN).  
* Heating:  
Use to warm your room.  
When Heating mode is selected, the air conditioner will operate at very low fan  
* During Heating mode:  
Set the thermostat to a temperature set-  
ting that is higher than the current room  
speed for about 3 to 5 minutes, after which it will switch to the selected fan set-  
temperature. The Heating mode will not  
ting. This period of time is provided to allow the indoor unit to warm up before  
operate if the thermostat is set lower than  
begin full operation.  
the actual room temperature.  
When the room temperature is very low, frost may form on the outside unit, and  
During Cooling mode:  
Set the thermostat to a temperature set-  
ting that is lower than the current room  
temperature. The Cooling mode will not  
operate if the thermostat is set higher than  
the actual room temperature (in Cooling  
mode, the fan alone will operate).  
its performance may be reduced. In order to remove such frost, the unit will  
automatically enter the defrost cycle from time to time. During defrosting (see  
page 15), the heating mode will be temporarily interrupted. DEFROST will be  
shown on the remote controller display.  
Cooling:  
Use to cool your room.  
Fan:  
Use to circulate the air throughout your room.  
En-4  
 
TIMER OPERATION (OFF TIMER/ON TIMER)  
Before using the timer function, be sure that the remote controller is set to the correct current time and Day.  
Press the START/STOP button; after the unit starts operation perform the following procedure:  
OFF Timer / ON Timer  
Press the TIMER MODE button and display either OFF  
Timer or ON Timer.  
The timer will start operating. (If you set the ON timer, the air conditioner  
will stop operating).  
AM  
AM  
CLOCK  
TIMER  
1
COOL  
OFF  
°F  
TIMER  
OFF  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
Each time the button is pressed the timer function changes in the follow-  
ing order:  
CLOCK ADJ
ENERGY SAVE  
DAY OFF  
START/STOP  
1
2
s
s
NON STOP (RESET)  
OFF  
sON  
s WEEKLY  
Press the SET TIME button and set the timer time.  
: Use to advance the time forward.  
: Use to turn the time back.  
(Press once to move the time 1 minute; hold down and the time will move  
10 minutes at a time.)  
AM  
CLOCK  
2
COOL  
OFF  
°F  
TIMER  
PM TIMER  
OFF  
Example: Setting the OFF TIMER  
to 11:35 p.m.  
To Cancel theTimer Mode  
During Timer Operation  
To confirm or Change Settings  
Before Starting Operation  
To Change the Timer Setting  
During Operation  
Press the TIMER MODE button and set  
the display to “NON STOP” (the unit will  
switch to non-stop operation).  
Operate as noted in step 2.  
To confirm settings  
Press the TIMER MODE button once.  
(The timer setting information will be  
displayed for 15 seconds after the  
TIMER MODE button is pressed.)  
To change settings  
To Stop Operation During  
Use of Timer Mode  
To Change the Timer Mode  
During Operation  
Confirm the settings as noted above,  
then press the SET TIME button and  
TIMER MODE button as necessary to  
change the desired timer setting.  
(The timer settings will be displayed  
for 15 seconds after the button is  
pressed.)  
Press the START/STOP button.  
Press the TIMER MODE button and set  
the unit to the desired mode.  
After confirming or changing the set-  
tings, press the START/STOP button  
to start operation.  
En-5  
 
TIMER OPERATION (WEEKLY TIMER)  
Use the weekly timer to set operating times for each day of the week.  
Weekly Timer Features  
Set different operating times for each day of the week.  
Set one or two operating spans (one or two ON times and one or two OFF times) per day.  
Set time to a resolution of 5 minutes.  
OFF time can be carried over to the subsequent day.  
Use the “DAY OFF” setting to cancel operation for any day of the coming week (one-time cancellation).  
Setting Up the Weekly Timer Operation  
Press the START/STOP button to stop the air conditioner, and then proceed as fol-  
lows.  
Press the TIMER MODE button so that “WEEKLY” ap-  
1
COOL  
ON  
pears on the display.  
The display now shows the current day (by DAY CODE), the first ON and  
OFF times for the day (the “WEEKLY 1” times), the fan speed, and the  
operating mode.  
The top time value gives the ON time, and the bottom value gives the  
OFF time.  
TIMER  
DAY  
WEEKLY  
1
OFF  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
CLOCK ADJUS
If either time is not set, the corresponding time display is blank “  
”.  
ZONE  
SET  
START/STOP  
1
2
DAF  
Press the TEMP./DAY button to select the day that you  
2
want to set up.  
: Use to advance the day forward.  
: Use to turn the day back.  
3
DAY CODE  
1
2
3
4
5
6
7
DAY OF THE WEEK MON TUE WED THU  
FRI  
SAT SUN  
Hold the SET button down for 3 seconds.  
3
4
The “WEEKLY 1” ON time starts flashing, and the fan speed and operat-  
ing mode displays go off.  
Press the SET TIME button to set the day’s first ON  
time.  
: Use to advance the time forward.  
: Use to turn the time back.  
AM  
ON  
TIMER  
DAY  
WEEKLY  
1
OFF  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
(Press once to move the time 5 minute; hold down and the time will move  
10 minutes at a time.)  
MASTER  
CONTROL  
CLOCK ADJUST  
4
Press the SET button.  
This registers the first ON time setting for the selected day.  
The ON time display stops flashing, and the “WEEKLY 1” OFF time starts  
flashing.  
ZON
ENERGY SAVE  
DAY OFF  
START/STOP  
5
SET  
5
En-6  
 
TIMER OPERATION (WEEKLY TIMER)  
Press the SET TIME button to set the day’s first OFF  
AM  
6
ON  
time.  
PM TIMER  
DAY  
WEEKLY  
1
OFF  
The earliest OFF time you can set is 5 minutes after the ON time. The  
latest OFF time is 11:55 p.m. on the subsequent day.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
Press the SET button.  
CLOCK ADJUST  
7
This registers the first OFF time for the day, completing the “WEEKLY 1”  
6
settings for that day.  
The display switches to “WEEKLY 2”, and the day’s second ON time be-  
gins flashing.  
ZON
ENERGY SAVE  
DAY OFF  
START/STOP  
SET  
7
Repeat the operations described in Steps 4 to 7 to set  
the second ON and OFF times for the day (the “WEEKLY  
2” times).  
When you press the SET button after setting the “WEEKLY 2” OFF time,  
the system registers the “WEEKLY 2” settings for the day and returns you  
to the “WEEKLY 1” ON time setup process. (The first ON setting reap-  
pears and begins flashing.)  
8
If the timer is not set, press the SET but-  
ton with the time display blank “  
and perform next operation.  
”,  
You can review your settings by pressing the SET button. Each press  
moves you to the next setting, as follows.  
s
s
s
WEEKLY 1  
ON  
WEEKLY 1  
OFF  
WEEKLY 2  
ON  
s WEEKLY 2  
OFF  
Press the TEMP./DAY button to select another day for  
setup. The repeat steps 4 to 8 above to set the ON and  
OFF times for that day.  
9
When you have finished setting all of the times, hold  
10down the SET button for 3 seconds.  
AM  
CLOCK  
The WEEKLY display flashes for 3 seconds while the new WEEKLY TIMER  
settings are registered, and then the clock display reappears.  
MODE  
CONTROL  
NOTES:  
(1) If no time values are flashing, the clock display will automatically reappear after 15 seconds if no buttons are pressed.  
(2) A flashing time value indicates that the system is in time-setting mode. To return to the clock display you must hold  
down the SET button for 3 seconds.  
(3) You do not need to set values for both WEEKLY 1 and WEEKLY 2. If you wish, you can set values only for WEEKLY 1  
or only for WEEKLY 2.  
(4) The allowable range for the day’s time settings is shown below.  
Cannot set  
5 min.  
OFF  
Available range  
5 min.  
ON  
Cannot set  
ON  
OFF  
Next day’s WEEKLY  
settings  
Previous day’s WEEKLY  
settings  
12:00 a.m.  
12:00 a.m.  
(5) If you set the OFF time to occur on the day following the ON time, the NEXT DAY caption appears on the display.  
PM  
ON  
PM TIMER  
DAY  
WEEKLY  
OFF  
2
NEXT DAY  
En-7  
 
Starting Weekly Timer Operation  
Press the TIMER MODE button so that “WEEKLY” ap-  
pears on the display.  
AM  
CLOCK  
COOL  
1
°F  
PM TIMER  
WEEKLY  
1
OFF  
Press the START/STOP button to start operation.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
2
(This step is not necessary if the air conditioner is already running.)  
MASTER  
CONTROL  
CLOCK ADJUS
Weekly timer operation starts, and the operation lamp comes on.  
(If the current time is between the first or second ON and OFF time set-  
tings for the current day, the air conditioner will start. Otherwise the air  
conditioner will remain off.)  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
1
2
The day display is replaced by the temperature display.  
The upper time display now shows the current time, and the lower time  
display shows the next scheduled ON or OFF time.  
To Stop Weekly Timer Operation  
Reviewing the Time Settings  
To stop weekly timer while leaving the air conditioner run-  
Press the START/STOP button to stop the air conditioner, and  
then proceed as follows.  
ning:  
Press the TIMER MODE button to select NONSTOP, OFF  
TIMER, or ON TIMER.  
1 Press the TIMER MODE button so that “WEEKLY” appears  
on the display.  
To stop weekly timer operation and the air conditioner also:  
2 Press the TEMP./DAY button to select the day that you want  
to check.  
Press the START/STOP button.  
3 Press the SET TIME button (or ) to switch between the  
“WEEKLY 1” or “WEEKLY 2” time displays.  
Cancelling Selected Time Settings  
Press the START/STOP button to stop the air conditioner, and then proceed as fol-  
lows.  
Carry out steps 1 to 3 of the “Setting Up the Weekly  
Timer Operation” procedure to select the day you want  
to edit.  
1
ON  
PM TIMER  
DAY  
WEEKLY  
1
OFF  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
Press the SET button to select the ON time that you  
want to cancel.  
2
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
Be sure to select an ON time (the upper time display).  
3
Hold down the side of the SET TIME button until the  
3
2
time display becomes blank “  
”.  
Example: Clearing the “WEEKLY 1” ON/  
OFF times for day 4 (Thurs-  
day)  
Press the SET button.  
The first OFF time setting (“WEEKLY 1” OFF time) is deleted and replaced  
by a flashing blank pattern “ ”.  
4
5
6
ON  
TIMER  
DAY  
WEEKLY  
1
Press the SET button again.  
This completes deletion of the “WEEKLY 1” ON/OFF settings.  
The second ON time setting (“WEEKLY 2” ON time) appears and flashes.  
If you wish to delete other time settings, repeat steps 2 through 5.  
OFF  
PM  
ON  
PM TIMER  
DAY  
WEEKLY  
Once the setting has been canceled, hold down the  
SET button for 3 seconds.  
The WEEKLY display flashes briefly, and then the clock display appears.  
OFF  
2
En-8  
 
TIMER OPERATION (WEEKLY TIMER)  
To Change Selected Time Settings  
Press the START/STOP button to stop the air conditioner, and then proceed as fol-  
lows.  
Carry out steps 1 to 3 of the “Setting Up the Weekly  
Timer Operation” procedure to select the day you want  
to edit.  
PM  
1
ON  
PM TIMER  
DAY  
WEEKLY  
OFF  
2
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
Press the SET button to select the time that you want  
2
CLOCK ADJUST  
to change.  
The selected setting flashes on the display. Each press moves you to the  
next setting for the selected day, as follows.  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
s
s
s
s
WEEKLY 1  
ON  
WEEKLY 1  
OFF  
WEEKLY 2  
ON  
WEEKLY 2  
OFF  
2
Example: Changing the “WEEKLY 2”  
ON setting for day 5 (Friday)  
from 2:00p.m. to 3:30p.m.  
Press the SET TIME button to change the time setting.  
PM  
AUTO  
AUTO  
3
4
5
ON  
PM TIMER  
DAY  
WEEKLY  
Press the SET button.  
The new setting overwrites the previous setting.  
OFF  
DEFROST TEST  
1
2
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
Once the setting has been canceled, hold down the SET  
button for 3 seconds.  
The WEEKLY display flashes briefly, and then the clock display appears.  
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
3
4
NOTES:  
In the following cases, cancel the set time prior to making the required amendments.  
(1) If you want to change the ON time to a time that is later than the currently set OFF time.  
ON OFF  
WEEKLY 1  
Time  
ON  
OFF  
Change  
WEEKLY 1  
Time  
(2) If the change would cause a temporary overlap between the first and second ON/OFF time spans.  
ON OFF ON OFF  
WEEKLY 2  
WEEKLY 1  
Time  
Time  
Temporary overlap  
ON  
ON  
Change  
OFF  
OFF  
WEEKLY 1  
WEEKLY 2  
En-9  
 
About the DAY OFF  
Use the DAY OFF setting to switch off timed operation for a selected day in the coming week.  
This is a temporary, one-time setting. The DAY OFF setting is automatically cleared as soon as the specified day passes.  
Using the DAY OFF Setting  
Press the START/STOP button to stop the air conditioner, and then proceed as fol-  
lows.  
COOL  
ON  
PM  
PM TIMER  
DAY  
WEEKLY  
1
DAY OFF  
OFF  
Carry out steps 1 to 2 of the “Setting Up the Weekly  
Timer Operation” procedure to select the day that you  
want to set as the DAY OFF.  
1
2
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
Press the DAY OFF button.  
The DAY OFF setting is registered, and the DAY OFF caption appears on  
the display.  
2
To cancel the DAY OFF setting:  
You can cancel the setting by pressing the DAY OFF button again.  
Example: To switch off timed operation  
for day 2 (Tuesday)  
NOTES:  
(1) The DAY OFF setting is only available for days for which weekly time settings already exist.  
(2) You can make this setting for any of the next seven days (counting from the current day).  
(3) The DAY OFF setting is effective over the range illustrated below. The Weekly setting for which an ON time has been  
set is eligible for the day in which the DAY OFF has been set.  
Effective range of DAY OFF setting  
ON  
OFF  
ON  
OFF  
WEEKLY setting for preceding  
day  
WEEKLY setting  
Preceding day  
DAY OFF day  
Next day  
12:00 a.m.  
12:00 a.m.  
(4) The display on the clock’s lower line will usually be “  
” for the DAY OFF set day during Weekly operations.  
AM  
CLOCK  
TIMER  
COOL  
°F  
WEEKLY  
DAY OFF  
Precautions during setup  
Setup is not possible in the following cases, so amend the time.  
If you set an ON time while leaving the OFF time setting blank:  
Nothing will happen when you press the SET button.  
To proceed, press the SET TIME button and enter an appropriate setting.  
When an attempt is made to set only the OFF time.  
Nothing will happen when you press the SET TIME button.  
Press the SET button and amend the entry for the ON time.  
ON and OFF times cannot be set to the same value.  
The OFF time cannot be set earlier than the ON time.  
The WEEKLY 2 settings cannot be set earlier than the WEEKLY 1 settings.  
The WEEKLY 1 and WEEKLY 2 time spans cannot overlap.  
En-10  
 
ENERGY SAVE OPERATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
To Use the ENERGY SAVE  
Press the ENERGY SAVE button.  
The unit will run in the ENERGY SAVE mode.  
AM  
CLOCK  
NON STOP  
AUTO  
°F  
The ENERGY SAVE lamp (green) will light.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
To Stop the ENERGY SAVE  
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAVE  
DAY OF  
START/STOP  
Press the ENERGY SAVE button one more time.  
The ENERGY SAVE mode will be turned off.  
The ENERGY SAVE lamp goes off, and the unit will return to the former operat-  
ing conditions.  
About the ENERGY SAVE  
The energy conservation mode (ENERGY SAVE) raises the set temperature slightly in the cooling mode and lowers the set  
temperature in the heating mode, using a computer program to economically control the operation of the unit.  
If you press the ENERGY SAVE button while the air conditioner is on, it will change to the conservation mode. If you press  
the ENERGY SAVE button while the unit is in the timer mode (ON timer, WEEKLY timer), the unit will go into the conserva-  
tion mode when the unit starts with the timer.  
If you turn off the air conditioner while in the conservation mode, the mode will be shut off.  
The temperature set on the remote controller will not change if the energy save mode is used.  
* When Heating  
When Cooling  
After the ENERGY SAVE button is pressed, the set tempera-  
ture will be lowered about 2 °F every 30 minutes. When it  
has lowered a total of 4 °F, then it will hold that temperature.  
After the ENERGY SAVE button is pressed, the set tempera-  
ture will be raised about 1 °F every 30 minutes. When it has  
gone up a total of 2 °F, then it will hold that temperature.  
2 °F  
4 °F  
Set to the ENERGY SAVE mode.  
30 min.  
30 min.  
2 °F  
1 °F  
Set to the ENERGY SAVE mode.  
En-11  
 
ADJUSTING THE DIRECTION OF AIR CIRCULATION  
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Begin air conditioner operation before performing this procedure.  
Vertical Air Flow Direction Adjustment  
DEFROST TEST  
Press the AIR FLOW DIRECTION SET button.  
Each time the button is pressed, the air flow direction range will change as fol-  
lows:  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
CLOCK ADJUST  
Fig. 6  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
1
2
3
4
1
2
3
4
Always use the remote controller’s AIR  
FLOW DIRECTION SET button to ad-  
just the UP/DOWN air flow direction  
flaps. Attempting to move them manu-  
ally could result in improper operation;  
in this case, stop operation and restart.  
The flaps should begin to operate  
properly again.  
The remote controller’s display does not change.  
Use the air flow direction adjustments within the ranges shown above.  
The air flow direction is set automatically as shown, in accordance with the  
type of operation selected.  
During Cooling mode  
: Horizontal flow 1  
: Downward flow 4  
* During Heating mode  
When used in a room with infants, chil-  
dren, elderly or sick persons, the air  
flow direction and room temperature  
should be considered carefully when  
making settings.  
During AUTO mode operation, for the first minute after beginning operation,  
air flow will be horizontal 1; the air flow direction cannot be adjusted during  
this period.  
SWING OPERATION  
Begin air conditioner operation before performing this procedure.  
To Select SWING Operation  
1
2
Press the AIR FLOW DIRECTION SWING button.  
The AIR FLOW DIRECTION SWING lamp (orange) will light.  
In this mode, the UP/DOWN air flow direction flaps will swing automatically to  
direct the air flow both up and down.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
To Stop SWING Operation  
Press the AIR FLOW DIRECTION SWING button once again.  
The AIR FLOW DIRECTION SWING lamp will go out.  
Air flow direction will return to the setting before swing was begun.  
About Swing Operation  
The range of swing is relative to the currently set air flow  
If the swing range is not as desired, use the remote con-  
troller’s AIR FLOW DIRECTION SET button to change the  
range of swing.  
direction.  
Air flow direction set  
Range of swing  
1 to 3  
The SWING operation may stop temporarily when the air  
conditioner’s fan is not operating, or when operating at  
very low speeds.  
1
2, 3  
4
2 to 4  
1 to 4 (All range)  
Air flow direction range (see Fig. 6)  
En-12  
 
CLEANING AND CARE  
Before cleaning the unit, be sure to stop the unit and disconnect the power supply.  
CAUTION!  
Turn off the electrical breaker.  
A fan operates at high speed inside the unit, and personal injury could result.  
Cleaning the Air Filter  
When reinstalling the filter, be sure that the hooks at A  
1. Push the intake grille pushbuttons (two  
places).  
and B engage correctly into place.  
B
2. Open the intake grille.  
4. Clean the air filters.  
Remove the dust from the air filters by vacuuming or  
washing them. After washing, allow the air filters to dry  
thoroughly in an area protected from sunlight.  
OPEN  
PUSH  
3. Hold down the hook at A and pull the fil-  
ter out.  
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.  
If dirt is allowed to accumulate on the air filter, air flow  
will be reduced, lowering operating efficiency and increas-  
ing noise.  
During periods of normal use, the air filters should be  
A
cleaned every two months.  
Filter  
B
A
Intake grille  
When used for extended periods, the unit may accumulate dirt inside, reducing its performance. We recommend that the  
unit be inspected regularly, in addition to your own cleaning and care. For more information, consult authorized service  
personnel.  
When cleaning the unit’s body, do not use water hotter than 100 °F, harsh abrasive cleansers, or volatile agents like  
benzene or thinner.  
Do not expose the unit body to liquid insecticides or hairsprays.  
If the unit will not be operated for a period of one month or more, be sure to allow the inner parts of the unit to dry  
thoroughly, in advance, by operating the unit in fan mode for half a day.  
En-13  
 
ERRORS AND SELF DIAGNOSIS  
Error Code  
Error Code  
Error contents  
Communication error  
t
s
(indoor unit  
remote controller)  
Communication error  
t
s
(indoor unit  
outdoor unit)  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
Room temperature sensor open  
MASTER  
CONTROL  
CLOCK ADJUST  
Room temperature sensor shortcircuited  
ONE  
ENERGY SAVE  
DAY OFF  
START/STOP  
Indoor heat exchanger temperature  
sensor open  
Indoor heat exchanger temperature  
sensor shortcircuited  
If there is a problem with the air conditioner, it will stop run-  
ning and “E: EE” will be displayed instead of the clock.  
Outdoor heat exchanger temperature  
sensor open  
Outdoor heat exchanger temperature  
sensor shortcircuited  
(1) If the operation lamp is on then press the START/  
STOP button to turn it off.  
(2) Press the SET TIME () and the TEMP./DAY ()  
buttons at the same time for more than three seconds  
to start the self diagnosis check.  
An error code will be displayed in the clock display area.  
(3) Press the SET TIME () and the TEMP./DAY () buttons  
again for more than three seconds to end the self diag-  
nosis check.  
Power source connection error  
Float switch operated  
Outdoor temperature sensor open  
Outdoor temperature sensor  
shortcircuited  
Discharge pipe temperature sensor open  
Discharge pipe temperature sensor  
shortcircuited  
Outdoor high pressure abnormal  
Discharge pipe temperature abnormal  
Model abnormal  
Indoor fan abnormal  
Outdoor signal abnormal  
Outdoor EEPROM abnormal  
En-14  
 
OPERATION DETAILS  
Instructions relating to heating(*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Please read and understand the following details regarding this air conditioner.  
Operation and Performance  
* Heating Performance  
*
Microcomputer-controlled Automatic Defrosting  
This air conditioner uses a heat pump which absorbs heat  
from outside air and brings it indoors. As a result, its heat-  
ing performance is reduced as the temperature of out-  
side air drops. If you find that insufficient room heat is  
produced, we recommend that you use the air conditioner  
together with other heating appliances.  
When the outside temperature is low and the humidity high,  
frost will collect on the outside unit, reducing heater effi-  
ciency. When this happens, the computer will automatically  
start the defrost cycle. During the defrost cycle, the indoor  
fan will shutdown and DEFROST will be displayed on the  
remote controller. It will take anywhere from 4 to 15 min-  
utes before the air conditioner starts up again.  
Heat-pump type air conditioners use warm-air  
recirculation to warm your entire room. As a result, some  
time will be required after starting operation until your  
entire room becomes warm.  
Low Ambient Cooling  
When the outdoor temperature drops, the outdoor unit’s fans  
may switch to Low Speed, or one of the fans may stop inter-  
mittently.  
*
When Indoor and Outdoor Temperatures are High  
When both indoor and outdoor temperatures are high dur-  
ing use of the heating mode, the outdoor unit’s fan may stop  
at times.  
AUTO Restart  
In Event of Power Interruption  
Should the power supply to the air conditioner be inter-  
rupted by a power failure, the air conditioner will restart  
automatically in the previously selected mode once the  
power is restored.  
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  
turn off the circuit breaker turn it on again and then use  
the remote controller to resume operation.  
Temperature and Humidity Range  
*Heating Mode  
Cooling/Dry Mode  
Outdoor temperature  
COOLING MODEL  
About 32 to 115 °F  
AUU18RC  
HEAT &  
About 32 to 75 °F  
AUU24RC  
COOL MODEL  
About 32 to 115 °F  
About 65 to 90 °F  
AUU36RC  
AUU42RC  
(Reverse Cycle)  
About 17 to 75 °F  
About 86 °F or less  
Indoor temperature  
Indoor humidity  
About 80 % or less  
If the unit is used for long pe-  
riods under high-humidity  
conditions, condensation  
may form on the surface of  
the indoor unit, and drip onto  
the floor or other objects un-  
derneath.  
If the air conditioner is used under higher temperature conditioner 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 temperature 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.  
En-15  
 
SYSTEM OPERATION  
<Control Several Units with just one Remote Controller>  
One remote controller can control up to 16 air conditioners.  
All the air conditioners can be operated with the same set-  
ting.  
Outdoor  
unit  
Indoor unit  
Remote  
controller  
Unit No.1  
Unit No.2  
Unit No.16  
To Use the ZONE CONTROL  
When the ZONE control button is pressed while multiple air conditioners  
are being centralized controlled, only the preset air conditioners stop.  
AM  
CLOCK  
NON STOP  
AUTO  
°F  
Press the ZONE control button.  
Preset units will stop.  
TIMER  
MODE  
SET TIME  
TEMP./DAY  
FAN  
CONTROL  
MASTER  
CONTROL  
The ZONE lamp (green) will light.  
CLOCK ADJUST  
ZONE  
SET  
ENERGY SAVE  
DAY OFF  
START/STOP  
To Stop the ZONE CONTROL  
Press the ZONE control button one more time.  
Those units that were stopped will start again.  
The ZONE lamp will go out.  
En-16  
 
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, turn off the elec-  
trical breaker, and consult authorized service personnel.  
Merely turning off the unit’s power switch will not completely disconnect the unit from the power  
source. Always be sure to turn off the electrical breaker to ensure that power is completely off.  
WARNING!  
Before requesting service, perform the following checks:  
Symptom  
See Page  
Problem  
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 electrical breaker is turned off then on again, 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 conditioner’s 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 panel due  
to temperature changes.  
*During Heating operation, a sizzling sound may be heard occa-  
sional. This sound is produced by the Automatic Defrosting op-  
eration.  
15  
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, 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 unit’s fan may stop, and  
steam may be seen rising from the unit. This is due to Automatic  
Defrosting operation.  
15  
Air flow 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 for a higher setting.  
*During Heating operation, the unit will temporarily stop opera-  
tion (between 2 and 16 minutes) as the Automatic Defrosting mode  
operates. During Automatic Defrosting operation, DEFROST will  
be shown on the remote controller display.  
15  
The fan may operate at very low speed when the unit is monitor-  
4
4
ing the room’s temperature.  
In the monitor AUTO operation, the fan will operate at very low  
speed.  
Water is produced from  
the outdoor unit:  
*During Heating operation, water may be produced from the out-  
15  
door unit due to Automatic Defrosting operation.  
En-17  
 
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).  
Items to check  
Has there been a power failure?  
Symptom  
See Page  
CHECK ONCE Doesn’t operate at all:  
MORE  
Has a fuse blown out, or a circuit breaker been tripped?  
Is the timer operating?  
5
Is the air filter dirty?  
Poor Cooling (or *Heating)  
performance:  
Are the air conditioner’s 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?  
If the problem persists after performing these checks, or if you notice burning smells, stop operation immediately, turn off the  
electrical breaker, and consult with authorized service personnel.  
En-18  
 

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