Fujitsu ASU9RLQ Service Manual
SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED
type
Models Indoor unit Outdoor unit
ASU9RLQ
ASU12RLQ
ASU18CL
ASU18RL
AOU9RLQ
AOU12RLQ
AOU18CL
AOU18RL
INVERTER
SERVICE
INSTRUCTION
R410A
CONTENTS
1. SPECIFICATION
ASU9/12RLQ, AOU9/12RLQ..........................................................................................
2. DIMENSIONS
ASU9/12RLQ, AOU9/12RLQ, ASU18C/RL, AOU18C/RL...............................................
ASU18C/RL, AOU18C/RL...............................................................................................
3. REFRIGERANT SYSTEM DIAGRAM
ASU9/12RLQ, AOU9/12RLQ..........................................................................................
ASU18C/RL, AOU18C/RL...............................................................................................
4. CIRCUIT DIAGRAM
ASU9/12RLQ, AOU9/12RLQ...........................................................................................
ASU18C/RL, AOU18C/RL...............................................................................................
5. DESCRIPTION OF EACH CONTROL OPERATION
1. COOLING OPERATION..............................................................................................
3. DRY OPERATION......................................................................................................
2. HEATING OPERATION..............................................................................................
5. INDOOR FAN CONTROL...........................................................................................
4. AUTO CHANGEOVER OPERATION.........................................................................
7. LOUVER CONTROL...................................................................................................
6. OUTDOOR FAN CONTROL.......................................................................................
9. TIMER OPERATION CONTROL................................................................................
8. COMPRESSOR CONTROL........................................................................................
11. TEST OPERATION CONTROL..................................................................................
10. ELECTRONIC EXPANSION VALVE CONTROL........................................................
13. FOUR-WAY VALVE EXTENSION SELECT...............................................................
12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )................................
15. MANUAL AUTO OPERATION ( Indoor unit body operation ).....................................
14. AUTO RESTART........................................................................................................
16. FORCED COOLING OPERATION............................................................................
18. COIL DRY OPEARTION CONTROL..........................................................................
17. COMPRESSOR PREHEATING..................................................................................
19. DEFROST OPERATION CONTROL..........................................................................
21. VARIOUS PROTECTIONS.........................................................................................
20. OFF DEFROST OPERATION CONTROL..................................................................
01-01
02-01
02-02
03-01
03-02
04-01
04-02
05-01
05-02
05-03
05-04
05-05
05-07
05-08
05-09
05-10
05-12
05-12
05-12
05-12
05-13
05-13
05-13
05-13
05-14
05-16
05-17
05-12
6. REFRIGERANT CAUTION -R410A-
1. R410A TOOLS............................................................................................................
3. PRECAUTION FOR SERVICING...............................................................................
2. PRECAUTION FOR INSTALLATION.........................................................................
5. DEFFERENCE FROM CONVENTIONAL MODEL(R22) AND PRECAUTIONS........
4. NEW REFRIGERANT R410A.....................................................................................
7. TROUBLE SHOOTING
1. WHEN THE UNIT DOES NOT OPERATE AT ALL....................................................
3. TROUBLE SHOOTING METHOD
2. SELF DIAGNOSIS FUNCTION..................................................................................
1. EXPLODED VIEW......................................................................................................
2. INVERTER ASSEMBLY SPECIFICATION.................................................................
8. APPENDING DATA
1. JUMPER SETTING OF INDOOR UNIT AND OUTDOOR UNIT................................
3. THERMISTOR RESISTANCE VALUES.....................................................................
4. CAPACITY/INPUT DATA...........................................................................................
2. OUTDOOR UNIT PRESSURE VALUE AND TOTAL ELECTRIC
CURRENT CURVE...................................................................................................
9. REPLACEMENT PARTS
10. INSTALLATION MANUAL
4. SELF-DIAGNOSIS FUNCTION AND CHECKING POINTS.......................................
5. SERIAL SIGNAL DIAGNOSIS....................................................................................
6. IPM PROTECTION.....................................................................................................
7. TROUBLE SHOOTING OF REFRIGERANT CYCLE.................................................
06-01
06-02
06-04
06-05
06-08
07-01
07-02
07-03
07-07
07-08
08-01
08-02
08-06
08-07
09-01
09-07
07-09
1 . SPECIFICATIONS
R410A
WALL MOUNTED type
INVERTER
SPECIFICATIONS
01-01
MODEL NAME
POWER SOURCE
PHASE
FREQUENCY
VOLTAGE
Ph
Hz
V
COOLING
PERFORMANCE
kW
Btu /h
CAPACITY (230V)
W
POWER CONSUMPTION (230V)
EER
W /W
Btu /(h.W)
SEER
RUNNING CURRENT
POWER FACTOR
MAXIMUM CURRENT
MOISTURE REMOVAL
OPERATING NOISE
(SOUND PRESSURE)
Btu /(h.W)
A
%
A
L /hr
Pt /h
dB
dB
dB
dB
dB
INDOOR UNIT
OUTDOOR UNIT
HI
ME
LO
QUIET
kW
Btu /h
CAPACITY
W
POWER CONSUMPTION
COP
W /W
Btu /(h.W)
Btu /(h.W)
HSPF
RUNNING CURRENT
POWER FACTOR
MAXIMUM CURRENT
A
%
A
OPERATING NOISE
(SOUND PRESSURE)
dB
dB
dB
dB
dB
INDOOR UNIT
OUTDOOR UNIT
HI
ME
LO
QUIET
COMPRESSOR
TYPE
OUTPUT
AIR CIRCULATION
(FAN MODE)
INDOOR UNIT
OUTDOOR UNIT
-
W
m3 /h
cfm
m3 /h
cfm
STARTING CURRENT
MINIMUM CIRCUIT AMPACITY
MAXIMUM OVERCURRENT PROTECTION
DESIGN PRESSURE
HIGH SIDE
LOW SIDE
PERMISSIBLE OUTDOOR
TEMPERATURE
COOLING
HEATING
A
A
A
PSI(MPa)
PSI(MPa)
°F
°C
°F
°C
HEATING
PERFORMANCE
OTHER
INDICATION
ASU9RLQ
AOU9RLQ
ASU12RLQ
AOU12RLQ
ASU18CL
AOU18CL
ASU18RL
AOU18RL
1
60
208-230
2.64
(1.05~3.51)
9,000
(3,600~12,000)
670
(200~1,200)
3.93
13.4
21.00
3.2
90
6.0
1.3
2.7
39
34
29
20
47
3.51
(0.87~5.28)
12,000
(3,000~18,000)
830
(200~1,800)
4.25
14.5
11.00
3.9
92
8.5
40
35
28
21
47
Rotary
750
560
329
2,060
1,211
3.9
10
20
450(3.10)
240(1.65)
14~115
-10~46
5~75
-15~24
1
60
208-230
3.51
(1.11~4.26)
12,000
(3,800~14,500)
960
(200~1,500)
3.66
12.5
21.00
4.5
93
7.0
1.8
3.8
41
35
29
20
47
4.68
(0.90~6.18)
16,000
(3,000~21,000)
1,250
(200~2,140)
3.75
12.8
10.55
5.7
95
10.0
41
35
28
21
48
Rotary
750
595
374
1,850
1,088
5.7
12
20
450(3.10)
240(1.65)
14~115
-10~46
5~75
-15~24
1
60
208-230
5.28
(1.62~5.58)
18,000
(5,500~19,000)
1,730
(250~2,000)
3.05
10.4
19.00
7.7
98
9.0
2.8
5.9
44
38
32
25
50
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Rotary
1,100
700
412
2,000
1,176
7.7
16
20
450(3.10)
240(1.65)
14~115
-10~46
1
60
208-230
5.28
(1.62~5.58)
18,000
(5,500~19,000)
1,730
(250~2,000)
3.05
10.4
19.00
7.7
98
9.0
2.8
5.9
44
38
32
25
50
6.30
(1.32~8.52)
21,600
(4,600~29,000)
1,930
(250~2,930)
3.28
11.2
10.00
8.6
98
13.5
42
37
32
27
50
Rotary
1,100
700
412
2,000
1,176
8.6
16
20
450(3.10)
240(1.65)
14~115
-10~46
5~75
-15~24
SPECIFICATIONS
01-02
MODEL NAME
CONNECTING METHOD
PIPE SIZE
LIQUID SIDE
GAS SIDE
INSTALLATION
STANDARD PIPE LENGTH
MAXIMUM PIPE LENGTH
CHARGE LESS PIPE LENGTH
AMOUNT OF ADDITIONAL CHARGE
MAXIMUM HEIGHT DIFFERENCE
NUMBER OF WIRE
NET
DRAIN HOSE LENGTH
GROSS
(PACKAGING WEIGHT)
HEIGHT
HEIGHT
WIDTH
DEPTH
WIDTH
DEPTH
MAIN UNIT
DIMENSIONS
INDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
KIND OF REFRIGERANT
AMOUNT OF CHARGING
WEIGHT
OTHER
INDICATION
ASU9RLQ
AOU9RLQ
ASU12RLQ
AOU12RLQ
ASU18CL
AOU18CL
ASU18RL
AOU18RL
Flare
6.35
1/4
9.52
3/8"
7.5
25
20
66
15
49
20
3 /16
15
49
4
580
22-13/16"
9.5
21
35
77
12
26
39
86
283
11-1/8"
790
31-1/8"
230
9-1/16"
540
21-1/4"
790
31-1/8"
290
11-7/16"
316
12-7/16"
835
32-7/8"
360
14-3/16"
625
24-5/8"
919
36-3/16"
385
15-3/16"
R410A
0.95
2-2/16
HEIGHT
HEIGHT
WIDTH
DEPTH
WIDTH
DEPTH
PACKAGE
DIMENSIONS
INDOOR UNIT
OUTDOOR UNIT
-
mm
in.
mm
m
m
m
ft.
g /m
oz. /ft.
m
ft.
-
mm
in.
kg
lbs.
kg
lbs.
kg
kg
mm
-
lbs.
kg
in.
ft.
ft.
lbs.
lbs.
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
Refrigerant
Flare
6.35
1/4
9.52
3/8"
7.5
25
20
66
15
49
20
3 /16
15
49
4
580
22-13/16"
9.5
21
37
82
12
26
41
90
283
11-1/8"
790
31-1/8"
230
9-1/16"
540
21-1/4"
790
31-1/8"
290
11-7/16"
316
12-7/16"
835
32-7/8"
360
14-3/16"
625
24-5/8"
919
36-3/16"
385
15-3/16"
R410A
1.05
2-5/16
Flare
6.35
1/4
12.7
1/2"
7.5
25
20
66
15
49
20
3 /16
15
49
4
580
22-13/16"
9
20
40
88
12
26
44
97
275
10-13/16"
790
31-1/8"
215
8-7/16"
578
22-3/4"
790
31-1/8"
300
11-13/16"
290
11-7/16"
835
32-7/8"
345
13-9/16"
648
25-1/2"
910
35-13/16"
380
14-15/16"
R410A
1.15
2-9/16
Flare
6.35
1/4
12.7
1/2"
7.5
25
20
66
15
49
20
3 /16
15
49
4
580
22-13/16"
9
20
40
88
12
26
44
97
275
10-13/16"
790
31-1/8"
215
8-7/16"
578
22-3/4"
790
31-1/8"
300
11-13/16"
290
11-7/16"
835
32-7/8"
345
13-9/16"
648
25-1/2"
910
35-13/16"
380
14-15/16"
R410A
1.15
2-9/16
2 . DIMENSIONS
R410A
WALL MOUNTED type
INVERTER
DIMENSIONS
ASU12RLQ / AOU12RLQ
Models : ASU9RLQ / AOU9RLQ
(unit : mm)
02-01
INDOOR UNIT
OUTDOOR UNIT
790
5617
540
356
290
230
790
283
288
DIMENSIONS
ASU18RL / AOU18RL
Models : ASU18CL / AOU18CL
(unit : mm)
02-02
275
215
790
347
578
48
10
320
508
540
20
300
125
66
790
3 . REFRIGERANT SYSTEM DIAGRAM
R410A
WALL MOUNTED type
INVERTER
REFRIGERANT SYSTEM DIAGRAM
2-Way
valve
Strainer
Strainer
3-Way
valve
Muffler
Muffler
4-Way valve
Expansion valve
Heat exchanger
( INDOOR )
Heat exchanger
( OUTDOOR )
AOU9RLQ
(2Pass)
AOU12RLQ
(4Pass)
Compressor
Cooling
Heating
ASU12RLQ / AOU12RLQ
Models : ASU9RLQ / AOU9RLQ
03-01
REFRIGERANT SYSTEM DIAGRAM
2-Way
valve
Strainer
Strainer
Sub-heat
exchanger
( INDOOR )
3-Way
valve
Muffler
4-Way valve
Expansion valve
Heat exchanger
( INDOOR )
Heat exchanger
( OUTDOOR )
Sub-accumulator
Compressor
Cooling
Heating
ASU18RL/ AOU18RL
Models : ASU18CL / AOU18CL
03-02
4 . CIRCUIT DIAGRAM
R410A
WALL MOUNTED type
INVERTER
CIRCUIT DIAGRAM
ASU12RLQ AOU12RLQ
Models : ASU9RLQ / AOU9RLQ
04-01
OUTDOOR UNIT
INDOOR UNIT
BLACK
BLACK
BLACK
BLACK
ORANGE
YELLOW
RED
PINK
BLUE
RED
WHITE
YELLOW
WHITE
RED
BLUE
BLUE
RED
YELLOW
WHITE
GREEN / YELLOW
GREEN
RED
BLACK
WHITE
W1
W2W3W4
GRAY
GRAY
WHITE
BLACK
RED
YELLOW
BLUE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
CN201
CN4
CN3
CN10CN2
CN1
CN6CN5
CN7
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
1
2
1
2
3
4
5
6
1
2
3
6
1
2
3
4
1
2
3
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
TERMINAL
ROOM TEMPERATURE THERMISTOR
PIPE TEMPERATURE THERMISTOR
FAN MOTOR
STEP MOTOR
SWITCH
BARISTOR
FUSE
3.15A
G1 2 3
F. M.
SW
POWER CIRCUIT
THERMAL FUSE
102
M
CONTROL BOARD
DISPLAY BOARD
AIR CLEAN UNIT
CIRCUIT DIAGRAM
ASU18RL / AOU18RL
Models : ASU18CL / AOU18CL
04-02
INDOOR UNIT
OUTDOOR UNIT
RED
WHITE
BLACK
RED
WHITE
BLACK
RED
BLACK
WHITE
YELLOW
BLUE
RED
BROWN
BLUE
ORANGE
YELLOW
WHITE
BLACK
BLACK
WHITE
RED
YELLOW
YELLOW
BLACK
BLACK
BROWN
BROWN
BLACK
BLACK
WHITE
WHITE
RED
BLACK
BLACK
BLACK
BLACK
GREEN
CN71
W10
W11
W7
W9
W8
CN801
W4
W2
W1
W3
CN40
CN30
CN70
1
5
4
3
2
6
1
5
4
3
2
6
1
5
4
3
2
6
1
5
4
3
2
1
3
2
1
3
2
6
1
4
3
2
1
4
3
2
1
3
2
1
3
2
1
3
2
1
3
2
2
2
1
1
5
(N)
4
(L)
3
2
1
FUSE
5A-250V
TO INDOOR UNIT
POWER SUPPLY
G
TERMINAL
FUSE 20A-250V
PIPE TEMP. THERMISTOR
DISCHARGE PIPE TEMP. THERMISTOR
OUTDOOR TEMP. THERMISTOR
REACTOR
FAN MOTOR
COMPRESSOR
EXPANSION VALVE
4-WAY VALVE
4WV
E V
F M
C M
S(S)
C(T)
R(R)
CONTROLLER PCB ASSY
ORANGE
RED
YELLOW
PINK
BLUE
BLACK
BLACK
BLACK
BLACK
YELLOW
BLUE
WHITE
BLACK
RED
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
GRAY
GRAY
WHITE
BLACK
RED
GREEN /
Y
ELLOW
G
321
1
65432
1
65432
1
543
2
1
543
2
1
543
2
1
543
2
1
543
2
1
65432
1
65432
1
65432
7 7 7
1
2
1
2
132
132
CN1
CN7
CN5 CN6 CN2
CN3
CN10
CN201
W1
W3
W2
THERMAL FUSE
102
TERMINAL
TO OUTDOOR UNIT
VARISTOR
FUSE
3.15A
FAN MOTOR
STEP MOTOR
PIPE TEMPERATURE
THERMISTOR
ROOM TEMPERATURE
THERMISTO
R
SW
POWER CIRCUIT
FM
M
CONTROLLER PCB ASSY
INDICATOR PCB ASSY
5 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
WALL MOUNTED type
INVERTER
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
1. COOLING OPERATION
1-1 COOLING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is 4°F(2°C) higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is 5°F(2.5°C) lower than a set temperature, the compressor will be
stopped.
* When the room temperature is between +4°F(+2°C) to -5°F(-2.5°C) of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Figure 1 based on the
fan speed mode and the outdoor temperature.
minimum
frequency
maximum
frequency
maximum
frequency
ASU9RLQ 18Hz 61Hz 80Hz
ASU12RLQ 18Hz 80Hz 96Hz
ASU18CL 18Hz 70Hz 90Hz
Outside air Outside air
temperature temperature
97°F(36°C)
A zone
93°F(34°C)
90°F(32°C)
B zone
86°F(30°C)
70°F(21°C)
C zone
66°F(19°C)
D zone
Hi Me Lo Quiet
A zone 80Hz 61Hz 51Hz 33Hz
B zone 80Hz 61Hz 51Hz 33Hz
C zone 80Hz 61Hz 51Hz 33Hz
9RLQ
D zone 51Hz 42Hz 36Hz 27Hz
E zone 51Hz 42Hz 36Hz 27Hz
F zone 51Hz 42Hz 36Hz 27Hz
A zone 96Hz 61Hz 51Hz 33Hz12RLQ
B zone 96Hz 61Hz 51Hz 33Hz
C zone 96Hz 61Hz 51Hz 33Hz
D zone 57Hz 42Hz 36Hz 27Hz
E zone 57Hz 42Hz 36Hz 27Hz
18CL
F zone 57Hz 42Hz 36Hz 27Hz
A zone
B zone
C zone
D zone
E zone
F zone
( Table 1 : Compressor Frequency Range )
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency to Maximum Frequency .
The room temperature is controlled 2°F(1°C) lower than the setting temperature for 40 minutes
after starting the operation.
After 40 minutes, it is controlled based on the normal setting temperature.
05-01
E zone
F zone
50°F(10°C)
32°F(0°C)
54°F(12°C)
36°F(2°C)
90Hz 45Hz 42Hz 30Hz
90Hz 45Hz 42Hz 30Hz
90Hz 45Hz 42Hz 30Hz
58Hz 38Hz 34Hz 24Hz
58Hz 38Hz 34Hz 24Hz
58Hz 38Hz 34Hz 24Hz
ASU18RL 18Hz 70Hz 90Hz
18RL A zone
B zone
C zone
D zone
E zone
F zone
90Hz 45Hz 42Hz 30Hz
90Hz 45Hz 42Hz 30Hz
90Hz 45Hz 42Hz 30Hz
58Hz 38Hz 34Hz 24Hz
58Hz 38Hz 34Hz 24Hz
58Hz 38Hz 34Hz 24Hz
2. HEATING OPERATION
2-1 HEATING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is lower by 6°F(3°C) than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is higher 5°F(2.5°C) than a set temperatire, the compressor will be
stopped.
minimum
frequency
maximum
frequency
ASU9RLQ 18Hz 130Hz
ASU12RLQ 18Hz 130Hz
ASU18CL
Outside air Outside air
temperature temperature
66°F(19°C)
C zone
63°F(17°C)
57°F(14°C)
B zone
54°F(12°C)
A zone
Hi Me Lo Quiet
A zone 130Hz 96Hz 80Hz 68Hz
B zone 130Hz 96Hz 80Hz 54Hz
9RLQ
C zone 130Hz 96Hz 80Hz 45Hz
A zone 130Hz 96Hz 80Hz 68Hz
B zone 130Hz 96Hz 80Hz 54Hz
12RLQ
C zone 130Hz 96Hz 80Hz 45Hz
A zone - - - B zone - - - -
18CL
C zone - - - -
* When the room temperature is between +4°F(+2°C) to -6°F(-3°C) of the setting temperature,
the compressor frequency is controlled within the range shown in Table2.
However, the maximum frequency is limited in the range shown in Figure 2 based on the
fan speed mode and the outdoor temperature.
( Table 2 : Compressor Frequency Range )
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
* The room temperature is controlled 4°F(2°C) higher than the setting temperature for 60 minutes
after starting the operation.
After 60 minutes, it is controlled based on the normal setting temperature.
05-02
- -
ASU18RL 18Hz 119Hz
A zone 119Hz 90Hz 70Hz 58Hz
B zone 119Hz 90Hz 70Hz 58Hz
18RL
C zone 119Hz 90Hz 70Hz 58Hz
3. DRY OPERATION
3-1 INDOOR UNIT CONTROL
The compressor rotation frequency shall change according to the temperature, set temperature,
and room temperature variation which the room temperature sensor of the indoor unit body has
detected as shown in the Table 3. However, after the compressor is driven, the indoor unit shall
run at operation frequency of 58Hz, for a minute.
Operating
frequency
ASU9RLQ 33Hz
ASU12RLQ 33Hz
ASU18CL 24Hz
room room
temperature temperature
compressor ON
Ts+3°F(1.5°C)
Ts+1°F(0.5°C)
compressor OFF
Compressor
ON
OFF
Indoor fan
Dry air flow
S-Lo
OFF
( Table 3 : Compressor frequency )
( Fig.3 : Compressor Control based on Room Temperature )
( Fig.4 : Indoor Fan Control )
05-03
When an IAQ works in 9/12LA models, it operate with S-LO without stopping.
10 30 60 180 60 180 60 10 30
(SEC)
ASU18RL 24Hz
4. AUTO CHANGEOVER OPERATION
When the air conditioner is set to the AUTO mode by remote cintrol, operation starts in the optimum
mode from amoung the HEATING, COOLING, DRY and MONITORING modes. During operation, the
optimum mode is automatically swiched 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, only the indoor and outdoor fans are operated for 1 minute. After 1 minute,
the room temperature and outside air temperature are sensed and the operation mode is
selected in accordance with the table below.
C zone
90°F(32°C)
B zone
14°F(-10°C)
A zone
( Table.4 Operation mode selection table)
Outside air temperature (TO)
Room temperature(TB)
A zone B zone C zone
TB > TS+4°F(2°C)
Monitoring
Cooling
(automatic dry)
Cooling
(automatic dry)
TS+4°F(2°C) TB TS - 4°F(2°C)
Monitoring Monitoring Monitoring
TB TS- 4°F(2°C) *Heating *Heating
*18CL is Monitoring
Monitoring
.When COOING was selected at , the air conditioner operates as follow:
The same operation as COOLING OPERATION of item 1 above is performed.
When the room temperature has remained at (set tempareure -2°F(1°C)) for 8 minutes, operation is
automatically switched to DRY and the same operation as DRY OPERATION of item 3 above
is performed.
If the room temperature reaches (set temperature+4°F(2°C) during DRY operation, operation returns to
COOLING operation.
.When HEATING was selected at , the same operation as HEATING OPERATION of item 2
above is performed.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the COOLING or HEATING operation mode was selected at above, operation is switched
to MONITORING and the operation mode is selected again.
1
<
1
2
3
1
4
1
( Fig.5 : Outside air temperature zone selection )
05-04
5. INDOOR FAN CONTROL
(1).Fan speed
( Table 5 : Indoor Fan Speed )
ASU9RLQ
Operat ion mode Air flow mode Speed (rpm)
Hi 1390
Me+ 1350
Me 1200
Lo 1000
Quiet 760
Cool air
prevention
760
Heating
S-Lo 480
Hi 1300
Me 1120
Lo 950
Cooling
Fan
Quiet 700
Dry 700
(2).FAN OPERATION
The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH, while the indoor
fan only runs.
When Fan mode is set at (Auto), it operates on (MED) Fan Speed.
ASU12RLQ
Operation mode Air flow mode Speed (rpm)
Hi 1440
Me+ 1350
Me 1200
Lo 1000
Quiet 760
Cool air
prevention
760
Heating
S-Lo 480
Hi 1370
Me 1150
Lo 950
Cooling
Fan
Quiet
700
Dry 700
ASU18CL
Operation mode Air flow mode Speed (rpm)
Hi -
Me+ -
Me -
Lo -
Quiet -
Cool air
prevention
-
Heating
S-Lo 480
Hi 1480
Me 1260
Lo 1040
Cooling
Fan
Quiet
850
Dry 850
05-05
ASU18RL
Operation mode Air flow mode Speed (rpm)
Hi 1480
Me+ 1420
Me 1300
Lo 1110
Quiet 950
Cool air
prevention
850
Heating
S-Lo 480
Hi 1480
Me 1260
Lo 1040
Cooling
Fan
Quiet
850
Dry 850
(3).COOLING OPERATION
Switch the airflow [AUTO], and the (Fig.6)
indoor fan motor will run according airflow change - over ( Cooling:AUTO )
to a room temperature, as shown in When the room
Figure 6. temperature rises
On the other hand, if switched in
[HIGH] [QUIET], the indoor motor
+5°F(+2.5°C)
will run at a constant airflow of [COOL]
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5.
+3°F
(+1.5°C)
+2°F(+1°C)
LOW mode
When the room
temperature lowers
(Room temperature) D (Setting temperature)
(4).DRY OPERATION
(5).HEATING OPERATION
Switch the airflow [AUTO], and the (Fig.7)
indoor fan motor will run according airflow change - over ( Heating:AUTO)
to a room temperature, as shown in When the room
Figure 7. temperature rises
On the other hand, if switched
LOW mode
[HIGH] [QUIET], the indoor motor -2°F(-1°C)
will run at a constant airflow of [HEAT]
-3°F(-1.5°C)
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5. -4°F(-2°C)
-5°F(-2.5°C)
MED + mode
When the room
temperature lowers
(Room temperature) D (Setting temperature)
(6).COOL AIR PREVENTION CONTROL (Heating mode)
Indoor heat exchanger Indoor heat exchanger
temperature temperature
117°F(47°C)
Hi
104°F(40°C)
Me+
99°F(37°C)
Lo
Cool air prevention
86°F(30°C)
S-Lo
Refer to the table 4.
Durring the dry mode operation, the fan speed
setting can not be changed.
The maximum value of the indoor fan speed is set as shown in Figure 8, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
(Fig.8 : Cool Air Prevention Control)
05-06
104°F(40°C)
82°F(28°C)
90°F(32°C)
93°F(34°C)
HIGH mode
MED mode
+4°F(+2°C)
MED mode
6. OUTDOOR FAN CONTROL
(1). Fan Speed
Cooling Dry Heating
ASU9RLQ 800/760/470
400/280
ASU12RLQ
200
ASU18CL
( Table 6 : Outdoor fan speed )
*
The outdoor fan speed mentioned avobe depends on the compressor frequency.
(When the compressor frequency increases, the outdoor fan speed also changes to the higher
speed. When the compressor frequescy decreases, the outdoor fan speed also changes to the
lower speed.)
*
It runs at 500(A-D ZONE)/200(E,F ZONE) rpm for 20 seconds after starting up the outdoor fan.
*
After the defrost control is operated on the heating mode, the fan speed keeps at the higher speed
as table 7 without relating to the compressor frequency.
05-07
A-D
E
F
A-D
E
F
A-D
E
F
ZONE
800/760/470
400/280
250/200
860/820/670/500
400/340/280
280/250/230
500
400/280
200
500
400/280
250/200
500
400/340/280
280/250/230
760/680/470
760/680/470
-
Refer to Fig1.
(rpm)
ASU18RL A-D
E
F
860/820/670/500
400/340/280
280/250/230
500
400/340/280
280/250/230
820/750/670/450
(1). Fan Speed
*
Outdoor temperature falls, and if it becomes E and F zone(Refer to Fig1), rotations of fan speed
will fall.
( Table 7 : Outdoor fan speed after the defrost )
ASU9RLQ
ASU12RLQ
ASU18CL
ASU18RL
Min
800rpm
900rpm
-
950rpm
7. LOUVER CONTROL
(1). VERTICAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follow:
Cooling / Dry mode
Heating mode
Fan mode
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
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 hating range for more than 30minutes, they will automatically
return to position .
During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically
becomes , and it cannot be adjusted.
Cooling mode / Dry mode / Fan mode( )
Heating mode / Fan mode( )
(Function Range)
(Fig 9: Air Direction Range)
(Operation Range)
(2). SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to
swing.
(Swinging Range)
When the indoor fan is either at S-lo or Stop mode, the swinging operation is interrrupted
and the louver stops at the memorized position.
05-08
8. COMPRESSOR CONTROL
(1). OPEARTION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in the table 8.
Cooling Heating
Min Max Min Max
Dry
ASU9RLQ 18Hz 80Hz 18Hz 130Hz 33Hz
ASU12RLQ 18Hz 96Hz 18Hz 130Hz 33Hz
ASU18CL 18Hz 90Hz - - 24Hz
ASU9RLQ 56Hz 74Hz 87Hz 97Hz 108Hz 119Hz
ASU12RLQ 56Hz 74Hz 87Hz 97Hz 108Hz 119Hz
ASU18CL 40Hz 59Hz 72Hz 80Hz 101Hz 110Hz
ASU9RLQ 80sec 60sec 60sec 180sec 60sec 60sec
ASU12RLQ 80sec 60sec 60sec 180sec 60sec 60sec
ASU18CL 60sec 40sec 40sec 60sec 150sec 60sec
(Table 8 : Compressor Operation Frequency Range)
(2). OPEARTION FREQUENCY CONTROL AT START UP
The compressor frequency soon after the start-up is controlled as shown in the figure 10.
(Fig.10 : Compressor Control at Start-up)
Time
Time Time Time
Time
Time
(Frequency)
(Time)
Frequency
Frequency
Frequency Frequency
Frequency
Frequency
Time Time
Time Time Time Time
Frequency
Frequency
Frequency
Frequency
Frequency
Frequency
05-09
ASU18RL 18Hz 90Hz 18Hz 119Hz 24Hz
ASU18RL 40Hz 59Hz 72Hz 80Hz 101Hz 110Hz
ASU18RL 60sec 40sec 40sec 60sec 150sec 60sec
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