Fujitsu ARU7RLF Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
Models Indoor unit Outdoor unit
AOU18RLXFZ
AOU24RLXFZ
AOU36RLXFZ
INVERTER MULTI
SERVICE
INSTRUCTION
R410A
Slim Duct / Compact Cassette
Compact Wall Mounted /
Wall Mounted / Floor
ARU7RLF
ARU9RLF
ARU12RLF
ARU18RLF
ARU24RLF
AUU7RLF
AUU9RLF
AUU12RLF
AUU18RLF
ASU7RLF
ASU9RLF
ASU12RLF
ASU18RLF
ASU24RLF
ASU9RLS2
ASU12RLS2
ASU15RLS2
ASU7RLF1
ASU9RLF1
ASU12RLF1
AGU9RLF
AGU12RLF
AGU15RLF
ASU15RLF1

CONTENTS
1. DESCRIPTION OF EACH CONTROL OPERATION
1. CAPACITY CONTROL................................................................................................
3. INDOOR FAN CONTROL...........................................................................................
2. AUTO CHANGEOVER OPERATION..........................................................................
5. OUTDOOR FAN CONTROL.......................................................................................
4. LOUVER CONTROL...................................................................................................
7. COMPRESSOR CONTROL.......................................................................................
6. TIMER OPERATION CONTROL................................................................................
9. TEST OPERATION CONTROL..................................................................................
8. ELECTRONIC EXPANSION VALVE CONTROL........................................................
11. 4-WAY VALVE EXTENSION SELECT.......................................................................
10. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )................................
13. MANUAL AUTO OPERATION...................................................................................
12. AUTO RESTART........................................................................................................
18. FRESH AIR CONTROL..............................................................................................
14. COMPRESSOR PREHEATING..................................................................................
20. DRAIN PUMP OPERATION.......................................................................................
19. EXTERNAL ELECTRICAL HEATER CONTROL.......................................................
21. DEFROST OPERATION CONTROL..........................................................................
22. VARIOUS PROTECTIONS.........................................................................................
01-01
01-01
01-03
01-11
01-16
01-17
01-20
01-21
01-21
01-21
01-22
01-22
01-23
01-24
01-24
01-25
01-26
01-29
01-22
2-1-2 WIRED REMOTE CONTROLLER DISPLAY......................................................
2-1-1 INDOOR UNIT DISPLAY....................................................................................
2-1 ERROR DISPLAY......................................................................................................
2. TROUBLE SHOOTING
2-2 TROUBLE SHOOTING WITH ERROR CODE..........................................................
2-3 TROUBLE SHOOTING WITH NO ERROR CODE....................................................
2-4 SERVICE PARTS INFORMATION............................................................................
02-01
02-01
02-02
2-1-3 OUTDOOR UNIT DISPLAY................................................................................. 02-03
02-34
02-04
02-39
3. REPLACEMENT PARTS
15. POWERFUL OPERATION.......................................................................................... 01-23
17. ECONOMY OPERATION........................................................................................... 01-23
16. MIN. HEAT OPERATIONEHEATING.......................................................................... 01-23

1 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
INVERTER (MULTI )
Slim Duct / Compact Cassette
Compact Wall Mounted /
Wall Mounted / Floor type

2. AUTO CHANGEOVER OPERATION
01-01
1. CAPACITY CONTROL
1-1 COOLING, HEATING, DRY CAPACITY CONTROL
Compressor frequency decides by capacity of an indoor unit, operation number of an indoor unit,
set temperature, room temperature and outside temperature.
When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum
mode from among the Heating, Cooling, Dry and Monitoring mode. During operation, the
optimum mode is automatically switched in accordance with temperature changes. The temperature
can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps.
When operation starts, indoor fan and outdoor fan are operated for around 3 minutes.
Room temperature and outdoor temperature are sensed,
and the operation mode is selected in accordance with the table below. <Monitoring mode>
Cooling mode
77°F (25°C)
Heating mode
( Table 1 : Operation mode selection table )
Room temperature (TR)
TR> Ts+4°F(+2°C)
Ts+4°F(+2°C) TR Ts -4°F(-2°C) *Middle zone
TR < Ts -4°F(-2°C) Heating
When Cooling or Dry mode was selected at and air flow mode is Auto, the air conditioner operates as follow.
The same operation as COOLING OPERATION AND DRY OPERATION.
When the room temperature has remained at set temperature -3°F(-1.5°C),
operation is automatically switched to Dry mode.
If the room temperature reaches set temperature +4°F(+2°C) during Dry mode, operation returns to Cooling.
1
1
2
( Fig. 1 : Outdoor temperature zone selection )
Cooling
(Autmatic dry)
Operation mode
*If it's Middle zone, operation mode of indoor unit is selected as below.
(1). Same operation mode is selected as outdoor unit.
If outdoor unit is operating in Cooling, Dry, and Heating mode,
indoor unit will be operated by the same operation mode.
(2). Selected by the outdoor temperature.
If outdoor unit is operating in other than Cooling, Dry, and Heating mode,
indoor unit will be operated according to the outdoor temperature as below.
Cooling
Cooling
Dry(X zone)
Dry(J zone)
Compressor stop
When the room
temperature drops
When the room
temperature rises
Ts +4°F(+2°C)
Ts -1°F(-0.5°C)
Ts -3°F(-1.5°C)
Ts +2°F(+1°C)
Ts -3°F(-1.5°C)
Ts -5°F(-2.5°C)
( Fig.2 : Auto changeover : Cooling - Dry )
TR : Room temperature
Ts : Setting temperature
TR : Room temperature
Ts : Setting temperature
( Air flow mode : Auto )

01-02
START
Room temp.
Ts+4°F(+2°C)?
COOLING (AUTO:DRY)
OPERATION
HEATING OPERATION
YES
YES
NO
NO
NO
AUTO CHANGEOVER operation flow chart
TS: Setting temperature
Room temp.
Ts -4°F(-2°C)?
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
NO
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
Middle zone
NO
Operation mode
of outdoor unit : Cooling or Dry?
YES
NO
Operation mode
of outdoor unit : Heating?
YES
NO
YES
Outdoor temperature
77 °F(25°C)?
NO
YES
YES
NO
YES
YES
When Heating was selected at , the same operation as HEATING OPERATION of page
01-02 is performed.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the Cooling(Auto:Dry) or Heating mode was selected at above, operation is switched
to Monitoring and the operation mode is selected again.
31
4
1

3. INDOOR FAN CONTROL
01-03
1. Fan speed
( Table 2 : Indoor fan speed table)
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
ASU7RLF
1050
1000
950
850
720
600
480
1050
950
850
710
600
X, J zone:710
ASU9RLF
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1100
1040
980
850
720
600
480
1100
980
850
710
600
X, J zone:710
ASU12RLF
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1200
1130
1050
910
720
600
480
1200
1050
880
710
600
X, J zone:710
ASU18RLF
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1260
1120
1020
900
790
680
480
1260
1020
900
770
680
X, J zone:770
ASU24RLF
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1430
1320
1220
1020
900
720
480
1480
1220
1020
900
720
X, J zone:900
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Quiet > Soft Quiet)
(rpm) (rpm)
(rpm) (rpm)
(rpm)

AUU12RLF
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
650
620
580
520
460
400
300
660
580
520
460
400
X, J zone:460
AUU18RLF
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
X, J zone:460
840
800
750
650
500
400
300
790
660
570
460
400
01-04
(rpm) (rpm)
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
AUU9RLF
590
570
540
490
440
400
300
590
540
490
440
400
X, J zone:440
(rpm)
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
AUU7RLF
590
570
540
490
440
400
300
590
540
490
440
400
X, J zone:440
(rpm)
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Quiet > Soft Quiet)

ARU7RLF (Static pressure:25Pa)
Hi
Me
Lo
Quiet
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
X, J zone:880
1160
1000
940
880
550
1160
1000
940
880
500
ARU12RLF (Static pressure:25Pa)
Hi
Me
Lo
Quiet
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
X, J zone:1030
1340
1240
1140
1030
500
1340
1240
1140
1030
500
ARU18RLF (Static pressure:25Pa)
Hi
Me
Lo
Quiet
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1380
1300
1220
1140
600
1380
1300
1220
1140
600
X, J zone:1140
ARU24RLF (Static pressure:25Pa)
Hi
Me
Lo
Quiet
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
X, J zone:1180
1460
1360
1260
1180
600
1460
1360
1260
1180
600
(rpm)
(rpm)
(rpm)
(rpm)
ARU9RLF (Static pressure:25Pa)
Hi
Me
Lo
Quiet
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
X, J zone:960
1260
1160
1060
960
500
1260
1160
1060
960
500
(rpm)
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Quiet > Soft Quiet)
01-05

01-06
Operation mode Air flow mode
Speed
Cooling/ Fan
Heating
Dry X zone: 750
J zone: 750
Upper& Lower
air flow mode
Upper
air flow mode
Hi
Hi
Me
Me
Lo
Lo
Quiet
Quiet
S-Lo
Cool air prevention
(Upper/ Lower)
(Upper/ Lower)
(Upper/ Lower)
1230/ 1040
1120/ 950
1000/ 850
860/ 730
660/ 560
660/ 560
660/ 560
1300
1230
1090
940
750
680
680
1230/ 1040
1120/ 950
960/ 820
820/ 700
660/ 560
570/ 480
660/ 560
1300
1230
1070
910
750
680
680
---- / ----
AGU9RLF
Powerful
Powerful
S-Lo
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Quiet > Soft Quiet)
* Soft Quiet
(rpm)
Operation mode Air flow mode
Speed
Cooling/ Fan
Heating
Dry X zone: 750
J zone: 750
Upper& Lower
air flow mode
Upper
air flow mode
Hi
Hi
Me
Me
Lo
Lo
Quiet
Quiet
S-Lo
Cool air prevention
(Upper/ Lower)
(Upper/ Lower)
(Upper/ Lower)
1350/ 1150
1240/ 1040
1080/ 920
910/ 770
660/ 560
660/ 560
660/ 560
1370
1300
1140
980
750
680
680
1350/ 1150
1240/ 1040
1050/ 890
860/ 730
660/ 560
570/ 480
660/ 560
1370
1300
1120
930
750
680
680
---- / ----
AGU12RLF
Powerful
Powerful
S-Lo
* Soft Quiet
(rpm)
Operation mode Air flow mode
Speed
Cooling/ Fan
Heating
Dry X zone: 750
J zone: 750
Upper& Lower
air flow mode
Upper
air flow mode
Hi
Hi
Me
Me
Lo
Lo
Quiet
Quiet
S-Lo
Cool air prevention
(Upper/ Lower)
(Upper/ Lower)
(Upper/ Lower)
1440/ 1230
1330/ 1120
1140/ 970
940/ 800
660/ 560
660/ 560
660/ 560
1440
1370
1180
1020
750
680
680
1440/ 1230
1330/ 1120
1100/ 930
890/ 750
660/ 560
570/ 480
660/ 560
1440
1370
1160
960
750
680
680
---- / ----
AGU15RLF
Powerful
Powerful
S-Lo
* Soft Quiet
(rpm)
Auto
Auto
Auto

ASU15RLS2
ASU9RLS2
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1050
1030
1030
950
850
650
610
570
1080
1030
950
850
650
610
570
X, J zone:650
ASU12RLS2
01-07
(rpm) (rpm)
(rpm)
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1160
1110
1110
1030
930
650
610
570
1160
1110
1030
930
650
610
570
X, J zone:650
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1230
1180
1180
1080
1010
790
610
570
1230
1180
1080
980
740
710
570
X, J zone:740
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-07+1
ASU7RLF1 (rpm)
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1090
1050
1000
950
850
710
600
480
1090
1050
950
850
680
600
480
X, J zone:680
ASU9RLF1 (rpm)
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1140
1090
1040
980
850
710
600
480
1140
1090
980
850
680
600
480
X, J zone:680
ASU12RLF1 (rpm)
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1240
1190
1120
1050
910
710
600
480
1240
1190
1050
880
680
600
480
X, J zone:680
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Quiet > Soft Quiet)
ASU15RLF1 (rpm)
Poweful
Hi
Me+
Me
Lo
Quiet
Cool Air Prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
S-Lo
Auto
Operation mode
Heating
Cooling / Fan
Dry
Air flow mode Fan Speed
1320
1280
1190
1120
770
600
480
1320
1280
1090
750
670
480
X, J zone:750
1050
1000

The airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi,
while the indoor fan only runs.
When Fan mode is set at (Auto), it operates on (Me) Fan Speed.
2. FAN OPERATION
3. COOLING OPERATION (Auto : Cooling)
Switch the airflow [Auto], and the indoor fan will run according to a room temperature,
as shown in Fig 3.
On the other hand, if switched in [Hi] [Quiet], the indoor fan will run at a constant airflow of [Cooling]
operation modes Quiet, Lo, Me, Hi.
( Fig.3 : Airflow change - over )
When the room
temperature rises
When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
TR-Ts > +4°F(+2°C)
=
+2°F(+1°C) > TR-Ts
+4°F(+2°C) > TR-Ts > +2°F(+1°C)
=
TR-Ts > +5°F(+2.5°C)
=
+3°F(+1.5°C) > TR-Ts
+5°F(+2.5°C) > TR-Ts > +3°F(+1.5°C)
=
Hi
Me
Lo
=
=
=
=
4. DRY OPERATION (Auto : Dry)
During the dry operation, the fan speed setting can not be changed,it operates automatically as shown in Fig. 4
Room temperature variation which the room temperature sensor of the indoor unit body has detected.
( Fig. 4 : Indoor fan control )
10 30 60 180 60 180 60 10 30 (sec)
Fan OFF
OFF
< Compressor >
ON
Setting air flow
S-Lo
< Indoor fan air flow mode >
< All models >
< All models >
< All models >
01-08

The maximum value of the indoor fan speed is set as shown in Fig 6, based on the detected
temperature by the indoor heat exchanger sensor in heating mode.
< ASU type >
01-09
5. HEATING OPERATION
Switch the airflow [Auto], and the indoor fan will run according to a room temperature,
as shown in Fig 5.
On the other hand, if switched in [Hi] [Quiet], the indoor fan will run at a constant airflow
of [Heat] operation modes Quiet, Lo, Me, Hi, as shown in Table 2.
6. COOL AIR PREVENTION CONTROL (For Heating and Min. Heat operation)
( Fig.5 : Airflow change - over ( Heating : Auto ) )
TR-Ts > -3°F(-1.5°C)
=
-5°F(-2.5°C) > TR-Ts
-3°F(-1.5°C) > TR-Ts > -5°F(-2.5°C)
=
TR-Ts > -2°F(-1°C)
=
-4°F(-2°C) > TR-Ts
-2°F(-1°C) > TR-Ts > -4°F(-2°C)
=
When the room
temperature rises When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
Lo
Me
Me+
107.6°F(42°C)
86°F
(30°C)
93.2°F
(34°C)
When Indoor heat exchanger
temperature rises
When Indoor heat exchanger
temperature drops
Hi
*Me+ or setting
FAN mode
Cool air
prevention
102.2°F
(39°C)
98.6°F
(37°C)
98.6°F
(37°C)
89.6°F
(32°C)
82.4°F
(28°C)
S-Lo
*Lo or setting
FAN mode
84.2°F
(29°C)
When Indoor heat exchanger
temperature rises When Indoor heat exchanger
temperature drops
*Lo or setting
FAN mode
98.6°F
(37°C) 89.6°F
(32°C)
75.2°F
(24°C)
*Hi or setting
FAN mode
S-Lo
During NORMAL HEATING OPERATION
< ARU type >
*Lower speed is selected
Field setting is necessary at AR and AU type as "Cool air prevention : effective"
TR-Ts > -3°F(-1.5°C)
=
-5°F(-2.5°C) > TR-Ts
-3°F(-1.5°C) > TR-Ts > -5°F(-2.5°C)
=
TR-Ts > -2°F(-1°C)
=
-4°F(-2°C) > TR-Ts
-2°F(-1°C) > TR-Ts > -4°F(-2°C)
=
When the room
temperature rises When the room
temperature drops
Lo
Me
Hi
< AUU/ ARU/ AGU type >
< ASU type >
( Fig.6 : Airflow change - over for cool air prevention)
*Lower speed is selected

01-10
93.2°F
(34°C)
When Indoor heat exchanger
temperature rises
Lo
102.2°F
(39°C)
Auto
When Indoor
heat exchanger
temperature rises
Lo 89.6°F
(32°C)
98.6°F
(37°C)
During MIN. HEAT OPERATION
< ASU / AUU type > < ARU type >
107.6°F
(42°C)
93.2°F
(34°C)
When Indoor heat exchanger
temperature rises
Hi
*Me+ or setting
FAN mode
Cool air
prevention
102.2°F
(39°C)
98.6°F
(37°C)
S-Lo
*Lo or setting
FAN mode
< AGU type >
*Lower speed is selected
107.6°F
(42°C)
87.8°F
(31°C)
When Indoor heat exchanger
temperature rises
Hi
*Me or setting
FAN mode
Cool air
prevention
102.2°F
(39°C)
93.2°F
(34°C)
S-Lo
*Lo or setting
FAN mode
*Lower speed is selected
87.8°F
(31°C)
When Indoor heat exchanger
temperature rises
Lo
102.2°F
(39°C)
Auto
< AGU type >
When Indoor heat exchanger
temperature drops
75.2°F
(24°C)
84.2°F
(29°C)
98.6°F
(37°C)
When Indoor heat exchanger
temperature drops
86.0°F
(30°C)
75.2°F
(24°C)
89.6°F
(32°C)
98.6°F
(37°C)
When Indoor heat exchanger
temperature drops
86.0°F
(30°C)
< AUU type >
Auto
When Indoor heat exchanger
temperature drops
When Indoor heat exchanger
temperature drops

4. LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follow:
(Function Range)
(Table9 : Recommended Operation Range)
01-11
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.
Cooling / Dry mode : Horizontal flow
Heating mode : Downward flow ASU7/9/12: , ASU18/24:
When the temperature of the air being blown out is low at the start of heating operation or during
defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.
During use of the Cooling and Dry modes, do not set the Air Flow Direction Louver in the Heating
range ( ) for long period of time, since water vapor many condense near the outlet louvers and
drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow
Direction Louvers are left in the heating range for around 30 minutes, they will automatically
return to position .
(Fig.7 : Virtical Air Direction Range)
Cooling / Heating / Dry mode / Fan mode
Cooling mode / Dry mode / Fan mode( ) :
Heating mode / Fan mode( ) : ASU7/9/12 [ ], ASU18/24 [ ]
3. SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to swing.
(Swinging Range)
1 3 14
466
Vertical Airflow Swing Operation
Horizontal Airflow Swing Operation (For ASU18/24RLF )
When the swing signal is received from the remote controller, the horizontal louver starts to swing.
All mode :
(Swinging Range)
5
1
Vertical and Horizontal Airflow Swing Operation
When the indoor fan is S-Lo or Stop mode, the swing operation is interrupted
and it stops at either upper end or bottom end.
When the indoor fan is S-Lo or Stop mode, the swing operation is interrupted
and it stops at either upper end or bottom end.
When the horizontal swing signal is input from remote control, the combination of the vertical
and horizontal swing operation is performed.
12345
2. HORIZONTAL LOUVER CONTROL (For ASU18/ 24RLF)
Horizontal Louver
Each time the button is pressed, the air directionrange will change as follows.
(Function Range)
Cooling / Heating / Dry mode / Fan mode
(Fig.8 : Horizontal Air Direction Range)
Power Diffuser doesn't swing in any swing operation.
For Compact Wall Mounted Type, Wall Mounted Type < ASU7/ 9/ 12/ 18/ 24RLF >
1. VERTICAL LOUVER CONTROL
Power DiffuserVertical Louver
Vertical Louver
<Wall Mounted Type><Compact Wall Mounted Type>
ASU7/9/12RLF changes by manual.
3 6
4

1. VERTICAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follow:
(Function Range)
01-12
The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Dry mode Horizontal flow
Heating mode Downward flow
When the swing signal is received from the remote controller, the vertical louver starts to swing.
(Fig.9 : Virtical Air Direction Range)
Cooling / Dry mode
Fan mode ( )
Types of Air flow Direction Setting:
, , : During Cooling/Dry modes
, , , : During Heating
The Remote Controller's display does not change.
During AUTO mode operation, for the first a few minutes after beginning operation,
air-flow will be horizontal 1; the air direction cannot be adjusted during this period.
The air flow direction setting will temporarily become 1 when the temperature of the air -flow is
low at the start of the Heating mode.
Range
Heating mode
Fanmode( )
The SWING operation may stop temporarily when the air conditioner’s fan is not operating,
or when operating at very low speeds.
1
2. ADJUST THE RIGHT-LEFT LOUVERS
Move the Right-Left louvers to adjust air flow in the direction you prefer.
Knob (2 places)
Right-Left Louvers
To select Vertical Airflow Swing Operation
(No function)
For Wall Mounted Type < ASU9/ 12/ 15RLS2 >
To select Horizontal Airflow Swing Operation
Knob
7
6
5
4
3
2
Use the air direction adjustments within the ranges shown above.
(Table 3 : Swinging Range)
Cooling /
3. SWING OPERATION

1. VERTICAL LOUVER CONTRO L
3. SWING OPERATION
Each time the button is pressed, the air direction range will change as follow:
(Function Range)
01-13
The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Cooling / Dry mode Horizontal flow
Heating mode Downward flow
When the swing signal is received from the remote controller, the vertical louver starts to swing.
(Table 4 : Swinging Range)
(Fig.10 Virtical Air Direction Range)
Cooling / Dry mode
Fan mode ( )
The Remote Controller's display does not change.
Use the air direction adjustments within the ranges shown above.
If you set the angle to position 4.7 for more than 30 minutes in COOL or
DRY mode, they automatically return to position 3.
In COOL or DRY mode, if the angle is set to position 4.7 for many hours,
condensation may be formed, and the drips may wet your property.
During AUTO or Heating mode operation, for the first a few minutes after beginning operation,
air-flow will be horizontal 1; the air direction cannot be adjusted during this period.
The air flow direction setting will temporarily become 1 when the temperature of the air -flow is
low at the start of the Heating mode.
Range
Heating mode
Fan mode ( )
The SWING operation may stop temporarily when the air conditioner’s fan is not operating,
or when operating at very low speeds.
2.ADJUST THE RIGHT-LEFT LOUVERS
Move the Right-Left louvers to adjust air flow
in the direction you prefer.
To select V ertical Airflow Swing Operation
To select Horizontal Airflow Swing Operation
(No function)
Right-Left Louvers
1
2
3
4567
Knob
For Wall Mounted Type < ASU7/ 9/ 12/ 15 RLF1 >

01-14
1. VERTICAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follows:
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
(Function Range)
(Fig.11 : Air Direction Range)
(Operation Range)
During COOLING / HEATING / DRY / FAN mode :
selected.
COOLING / DRY / FAN mode Horizontal flow
HEATING mode Downward flow
2. SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to swing.
The range of swing depends on the set airflow direction.
When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.
( Stop mode means Operation stop.)
During AUTO mode operation, for the first minute after start-up, air-flow will be horizontal
; the air direction cannot be adjusted during this period.
The type of operation
COOLING / HEATING / DRY / FAN
Range of swing
to
For Compact Cassette Type < AUU7/ 9/ 12/ 18RLF >
1 2 3 4
1 2 3 4
1
1 4
4
1
2
3
4
(Table 5 : Swinging Range)

01-15
For Floor Type < AGU9/ 12/ 15RLF >
1. VERTICAL LOUVER CONTROL
Each time the button is pressed,
the air direction range will change as follows:
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.
Cooling / Dry / Fan mode Horizontal flow
Heating mode Downward flow
When the temperature of the air being blown out is low at the start of heating operation or during
defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.
During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically
becomes , and it cannot be adjusted.
(Function and Operation Range)
When the swing signal is received from the remote controller, the vertical louver starts to swing .
When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrrupted
and it stops at either upper end or bottom end.
( Fig.12 : Air Direction Range)
Cooling / Heating / Dry / Fan mode :
(Swinging Range)
2. SWING OPERATION

5. OUTDOOR FAN CONTROL
The Table 6 shows the fan speed of the outdoor unit.
01-16
1. Outdoor Fan Motor
*It runs at 500rpm for 20 seconds after starting up the outdoor fan.
When the outdoor heat exchanger temperature is lower than 2°F(1°C),
the fan speed switches to 780rpm on heating mode.
When the outdoor heat exchanger temperature is lower than 4°F(2°C),
the fan speed switches to 900rpm on heating mode.
( Table 6 : Fan speed of the outdoor unit )
780/ 730/ 400/ 300/ 250/ 200 rpm 780/ 730/ 660/ 400/ 300/ 250/ 200 rpm
Cooling Heating
AOU18RLXFZ
AOU24RLXFZ
AOU36RLXFZ 850/ 780/ 400/ 300/ 200 rpm 900/ 780/ 400/ 300/ 200 rpm
(AOU18 / 24RLXFZ)
(AOU36RLXFZ)