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

9. TIMER OPEARTION CONTROL

(1). OPEARTION FREQUENCY RANGE

The table 9 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER
ASU9RLQ
ASU12RLQ
ASU18CL

OFF timer : When the clock reaches the set time, the air conditioner will be turned off.

Operation mode

Stop mode

Set time of timer

ON timer : When the clock reaches the set time, the air conditioner will be turned on.

Operation mode

Stop mode

Set time of timer

The program timer allows the OFF timer and ON timer to be used in combination one time.

Operation mode

Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest

to the clock's current timer setting. The order of operations is indicated by the arrow in the remote
control unit's display.
SLEEP timer operation cannot be combined with ON timer operation.

(Table 9 : Timer Setting)

(2). PROGRAM TIMER

Stop mode

Stop mode

Stop mode

Operation mode

Operation mode

Set time

Set time Set time Set time

05-10

ASU18RL

(3). SLEEP TIMER

If the sleep is set, the room temperature is monitored and the operation is stopped automatically.
If the operation mode or the set temperature is change after the sleep timer is set, the operation is
continued according to the changed setting of the sleep timer from that time ON.

Set temperature rises

( Ts : Set temperature )

Stop of operation

Set temperature lowers
( Ts : Set temperature )

Ts

Stop of operation

In the cooling operation mode

When the sleep timer is set, the setting temperature is increased 2°F(1°C).
It increases the setting temperature another 2°F(1°C) after 1 hour.
After that, the setting temperature is not changed and the operation is stopped at the time
of timer setting.

Ts

+2°F(+1°C)

+4°F(+2°C)

Set

60min

In the heating operation mode

When the sleep timer is set, the setting temperature is decreased 2°F(1°C).
It decreases the setting temperature another 2°F(1°C) every 30 minutes.
Upon lowering 8°F(4°C), the setting temperature is not changed and the operation stops at
the time of timer setting.

-8°F(-4°C)

-6°F(-3°C)

-4°F(-2°C)

-2°F(-1°C)

Set

30min

30min

30min

05-11

10. ELECTRONIC EXPANSION VALVE CONTROL

The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the following values.
The compressor frequency, the temperatures detected by the discharge temperature sensor, the
indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature
sensor.

The pulse range of the electronic expansion valve control is between 60 to 480 pulses.

The expansion valve is set at 480 pulses after 110 seconds of stopping compressor.

At the time of supplying the power to the outdoor unit, the initialization of the electronic
expansion valve is operated (528 pulses are input to the closing direction).

11. TEST OPERATION CONTROL

Under the condition where the air conditioner runs, press the test operation button of the remote
control, and the test operation control mode will appear. During test running, the operation lamp
and timer lamp of the air conditioner body twinkle simultaneously. Set the test operation mode,
and the compressor will continue to run regardless of whether the room temperature sensor detects.

The compressor won't enter operation status for 2 minutes and 20 seconds after the compressor is
stopped, even if any operation is given.

At the time when the air conditioner is switched from the cooling mode to heating mode, the
compressor is stopped, and the four-way valve is switched in 2 minutes and 20 seconds later after
the compressor stopped.

When the power was interrupted by a power failure, etc. during operation, the operation contents
at that time are memorized and when power is recovered, operation is automatically started with
the memorized operation contents.
When the power is interrupted and recovered during timer operation, since the timer operation time

is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF)

the indoor unit body timer lamp.

[Operation contents memorized when the power is interrupted]

Operation mode
Set temperature
Set air flow
Timer mode and timer time
Set air flow Direction
Swing

The test operation mode is released if 60 minutes have passed after setting up the test operation.

12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )

13. FOUR-WAY VALVE EXTENSION SELECT

14. AUTO RESTART

05-12

Air clean(Only 9/12LA model)

15. MANUAL AUTO OPERATION (Indoor unit body operation)

If MANUAL AUTO Button is set, the operation is controlled as shown in Table 10.
If the remote control is lost or battery power dissipated, this function will work without the remote
control.

OPERATION MODE Auto changeover
FAN CONT. MODE Auto
TIMER MODE Continuous
SETTING TEMP. 75°F(24°C)
SETTING LOUVER Standard
SWING OFF

When the outdoor heat exchanger temperature is lower than temperature and the heating operation has
been stopped for 30 minutes, power is applied to the compressor and the compressor is heated.
(By heating the compressor, warm air is quickly discharged when operation is started.)
When operation was started, and when the outdoor temperature rises to temperature or greater, preheating
is ended.

ASU9RLQ
ASU12RLQ
ASU18CL

ASU9RLQ

900rpm 36Hz

ASU12RLQ

900rpm 36Hz

(Table 10)

(No timer setting available)

17. COMPRESSOR PREHEATING

(Table 11 : Preheating Operation / Release Temperature)

Temperature

Temperature

41°F(5°C)
41°F(5°C)

-

45°F(7°C)
45°F(7°C)

-

18. COIL DRY OR AIR CLEAN OPERATION CONTROL

The coil-dry operation functions by pressing COIL DRY button on the remote controller.
The coil-dry operation is consisted of 3 cycles of [Fan operation 3 minutes / Heating operation
2 minutes], and Fan operates for 3 minutes at last before ending the air conditioner operation.
(It takes 18 minutes to complete the coil-dry operation.)

(Table 12 : COIL-DRY or AIR-CLEAN Operating Functions)

Indoor Fan Speed

Compressor
Frequency

Louver
Position

Main Unit
Indication

COIL-DRY or AIR-CLEAN indication : ON
Other indication : OFF

05-13

Forced cooling operation

Cooling

16. FORCED COOLING OPERATION

Forced cooling operatio is started when pressing MANUAL AUTO button for 10 seconds or more.
During the forced cooling operation, it operates regardless of room temperature sensor.
Operation LED and timer LED blink during the forced cooling operation. They blink for 1 second ON
and 1 second OFF on both operation LED and timer LED (same as test operation).
Forced cooling operation is released after 60 minutes of starting operation.
The FORCED COOLING OPERATION will start as shown in Table10.

-

480rpm

ASU18RL

41°F(5°C)

45°F(7°C)

ASU18RL

900rpm 34Hz

480rpm

(1). COIL DRY OPERATION CONTROL (ASU18RL model only)

(2). AIR CLEAN OPERATION CONTROL (ASU9/12RLQ model only)

The coil-dry operation functions by pressing AIR CLEAN button on the remote controller.
It continues from COIL DRY operation, it turns on electricity to AIR CLEAN UNIT, sterilization is
performed for 15 minutes.
Indoor unit fan motor operation under AIR CLEAN operation : The cycle of 480rpm Fixation
5 sec ON /1 min OFF is repeated.
(It takes 33 minutes to complete the AIR CLEANING operation.)

Hi

Horizontal
OFF

Room Temp is not controlled

Manual auto operation

-

19. DEFROST OPERATION CONTROL

(1). CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 13.

(Table 13 : Condition of starting Defrost Operation)

ASU9RLQ
ASU12RLQ
ASU18CL
ASU18RL

ASU9RLQ

ASU12RLQ

ASU18RL

1 time defrosting
after starting
operation

ST

Compressor operating time

Less than 20 minutes 20 to 60 minutes

60 minutes to 4 hours

After 4 hours

Does not operate

- 16°F(-9°C)

- 16°F(-9°C)

-

- 16°F(-9°C)

- 23°F(-5°C)

- 23°F(-5°C)

-

- 23°F(-5°C)

- 27°F(-3°C)

-

- 27°F(-3°C)

- 27°F(-3°C)

ASU9RLQ
ASU12RLQ
ASU18CL
ASU18RL

Defrosting after 2
time upon starting
operation

nd

Less than 35 minutes

35 minutes to
4 hours

Does not operate

Compressor operating time

After 4 hours

- 27°F(-3°C)

- 27°F(-3°C)

-

- 27°F(-3°C)

- 21°F(-6°C)

- 21°F(-6°C)

-

- 21°F(-6°C)

(2). CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 14.

(Table 14 : Defrost Release Condition)

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 61°F(16°C) or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 61°F(16°C) or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 50°F(10°C) or
Compressor operation time has passed 15 minutes.

05-14

Defrost Flow Chart

The defrosting shall proceed by the integrating operation time and outdoor heat exchanger
temperature as follows.

(Not defrosted for 10 minutes)

(In case of 1st defrost) (In case of 2nd and later defrost)

Compressor OFF
Outdoor fan motor OFF
30 sec later four - way valve OFF
36 sec later compressor ON

Heating operation start : Compressor ON

Compressor integrating

operation:
Over 20 minutes to
below 60 minutes

Compressor integrating

operation:
Over 60 minutes to
below 240 minutes

Compressor integrating

operation:
Over 240 minutes

Compressor integrating

operation:
Over 35 minutes to
below 240 minutes

Compressor integrating

operation:
Over 240 minutes

Outdoor heat exchanger

temperature:
Below - 16°F(-9°C)

Outdoor heat exchanger

temperature:

Outdoor heat exchanger

temperature:

Outdoor heat exchanger

temperature:

Outdoor heat exchanger

temperature:

Defrost start

Defrost Indicator:

[Operation lamp]

7 sec ON / 2 sec OFF

Outdoor heat exchanger temperature:

Over 50°F(10°C) / 61°F(16°C)

or
Compressor ON time:
Over 15 minutes

Defrost end

Below - 23°F(-5°C)

Below - 27°F(-3°C)

Below - 21°F(-6°C)

Below - 27°F(-3°C)

05-15

20. OFF DEFROST OPEARTION CONTROL

(1). OFF DEFROST OPERATION CONDITION

When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat
exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation
lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost,
and then stop.

In heating operation, the outdoor heat exchanger temperature is less than - 25°F(-4°C), and
compressor operation integrating time lasts for more than 30 minutes.

ASU9RLQ

ASU12RLQ

ASU18RL

OFF Defrost Flow Chart

Heating operation stop

Outdoor heat exchanger temperature:

Below - 25°F(-4°C)

and
Compressor integrating operation:
Over 30 minutes

Defrost start

Defrost Indicater:

[Operation lamp]

Outdoor heat exchanger temperature:

Over 50°F(10°C) / 61°F(16°C)

or

Compressor ON time:

Over 15 minutes

Defrost end

(2). OFF DEFROST END CONDITION

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 61°F(16°C) or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 61°F(16°C) or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 50°F(10°C) or
Compressor operation time has passed 15 minutes.

7 sec ON / 2 sec OFF

05-16

21. VARIOUS PROTECTIONS

(1). DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas
temperature.

ASU9RLQ 219°F(104°C) 214°F(101°C) 230°F(110°C)
ASU12RLQ 219°F(104°C) 214°F(101°C) 230°F(110°C)
ASU18CL 219°F(104°C) 214°F(101°C) 230°F(110°C)
ASU18RL 219°F(104°C) 214°F(101°C) 230°F(110°C)

ASU9RLQ ASU12RLQ ASU18CL ASU18RL

OT (Control / Release)

63°F(17°C)

54°F(12°C)

ASU9RLQ ASU12RLQ ASU18CL ASU18RL

115°F(46°C)

104°F(40°C)

3.5A / 3.0A

4.0A / 3.5A

5.5A / 5.0A

4.0A / 3.5A

5.0A / 4.5A

6.5A / 6.0A

4.5A / 4.0A

6.0A / 5.5A

8.5A / 8.0A

4.5A / 4.0A

6.0A / 5.5A

8.5A / 8.0A

6.5A / 6.0A

8.0A / 7.5A

8.0A / 7.5A

8.0A / 7.5A

6.5A / 6.0A

8.0A / 7.5A

8.5A / 8.0A

9.5A / 9.0A

/

/

/

/

When the discharge temperature becomes higher than Temperature ,the compressor frequency
is decreased 20 Hz, and it continues to decrease the frequency for 20 Hz every 120 seconds until
the temperature becomes lower than Temperature .

When the discharge temperature becomes lower than Temperature ,the control of the control of the
compressor frequency is released.

When the discharge temperature becomes higher than Temperature ,the compressor is stopped
and the indoor unit LED starts blinking.

(Table 15 : Discharge Temperature Over Rise Prevension Control / Release Temperature)

Temperature

Temperature

Temperature

(2). CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input current does not exceeds
the current limit velue that was set up with the outdoor temperature.
The compressor frequency returns to the designated frequency of the indoor unit at the time
when the frequency becomes lower than the release value.

(Table 16 : Current Release Operation Value / Release Value)

[ Heating ]

[ Cooling / Dry ]

OT : Outdoor Temperature

OT : Outdoor Temperature

OT (Control / Release)

41°F(5°C)

05-17

7.0A / 6.5A

9.0A / 8.5A

10.5A / 10.0A

12.0A / 11.5A

OT (Control / Release)

63°F(17°C)

54°F(12°C)

41°F(5°C)

OT (Control / Release)

63°F(17°C)

54°F(12°C)

41°F(5°C)

OT (Control / Release)

63°F(17°C)

54°F(12°C)

41°F(5°C)

115°F(46°C)

104°F(40°C)

OT (Control / Release)

115°F(46°C)

104°F(40°C)

OT (Control / Release)

115°F(46°C)

104°F(40°C)

OT (Control / Release)

(3). ANTIFREEZING CONTROL (Cooling and Dry mode)

The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger
temperature sensor detects the temperature lower than Temperature .
Then, the anti-freezing control is released when it becomes higher than Temperature .

A-D
E,F

(Table 17 : Anti-freezing Protection Operation / Release Temperature)

TemperatureTemperature

39°F(4°C)
39°F(4°C)

45°F(7°C)
55°F(13°C)

(4). COOLING PRESSURE OVERRISE PROTECTION

(Table 18 : Cooling Pressure Over Rise Protection Function Temperature)

When the outdoor unit heat exchange sensor temperature rises to temperature or greater, the
compressor is stopped and trouble display is performed.

ASU9RLQ 153°F(67°C)
ASU12RLQ 153°F(67°C)
ASU18CL 153°F(67°C)
ASU18RL 153°F(67°C)

Temperature

(5). HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE )

On heating mode, the compressor frequency is controlled as following based on the
detection value of the indoor heat exchanger temperature sensor.

05-18

[ ASU9/12RLQ ]

[ ASU18RL ]

46Hz or greater 45Hz

39Hz or greater 38Hz

39 45Hz

38Hz

26 38Hz 25Hz

19 29Hz 18Hz

18 25Hz OFF

OFF

Indoor heat exchange
temperature

[ Control System ]

Temperature

Temperature

Refer to below

Temperature

Temperature

The compressor frequency is
precisely controlled so that
it does not exceeds Temperature .

It returns to the normal operation

Compressor Operation

18Hz

30

Frequency down every 120 seconds

Frequency down every 120 seconds

ASU9RLQ 131°F(55°C)
ASU12RLQ 131°F(55°C)
ASU18CL ­ASU18RL 131°F(55°C)

Temp

Temp Temp Temp

127°F(53°C)
127°F(53°C)

-

127°F(53°C)

126°F(52°C)
126°F(52°C)

-

126°F(52°C)

122°F(50°C)
122°F(50°C)

-

122°F(50°C)

6 . REFRIGERANT CAUTION -R410A-

R410A

WALL MOUNTED type

INVERTER

1. R410A TOOLS

Gauge manifold . . . . . . . . . . . . . . . . . . . . . (Fig.4-1)

Since the normal pressure is high, the connection pipe size
is also different.

Charge hose . . . . . . . . . . . . . . . . . . . . . . . (Fig.4-2)

Refrigerant cylinder . . . . . . . . . . . . . . . . . (Fig.4-3)

Confirm the refrigerant type before charging. Always
charge liquid-phase refrigerant.

Electronic balance for refrigerant

charging . . . . . . . . . . . . . . . . . . . . . . . . . . . (Fig.4-4)

Electronic balance is recommended as in the case of
R410A.

Vacuum pump with adapter to prevent

reverse flow . . . . . . . . . . . . . . . . . . . . . . . .(Fig.4-5)

Conventional pump can be used.

Vacuum holder . . . . . . . . . . . . . . . . . . . . . (Fig.4-6)

Conventional pump can be used if adapter for preventing
vacuum pump oil from flowing back is used.

Gas leakage tester . . . . . . . . . . . . . . . . . . (Fig.4-7)

Exclusive for HFC

Refrigerant cleaner . . . . . . . . . . . . . . . . . . (Fig.4-8)

Brown paint as designated by the ARI, USA

Flare tool . . . . . . . . . . . . . . . . . . . . . . . . . . (Fig.4-9)

Torque wrench . . . . . . . . . . . . . . . . . . . . (Fig.4-10)

Refrigerant recovering

equipment (Collector) . . . . . . . . . . . . . . (Fig.4-11)

The type which can be used for any refrigerant is available

Nitrogen cylinder . . . . . . . . . . . . . . . . . . . (Fig.4-12)

This prevents an oxide film from forming in the pipe silver­alloy brazing work by turning the air out of the pipe and
preventing the inside combustion.

Safety charger . . . . . . . . . . . . . . . . . . . . . (Fig.4-13)

It is always compulsory to change the liquid, because
R410A is a mixed refrigerant and there is some fear that a
mixing ratio changes. In order to avoid the refrigerant from
returning to the compressor in a liquid state, the refrigerant
can be charged instead of giving a load to the compressor
with a safety charger.

Control valve . . . . . . . . . . . . . . . . . . . . . . (Fig.4-14)

The control valve prevents the refrigerant from spouting
when it is removed, as the charging hose side and the ser­vice port side are possible to open and close at the same
time.

Thermistor vacuum gauge . . . . . . . . . . . (Fig.4-15)

To remove moisture from the refrigerating cycle complete­ly, it is necessary to perform appropriate vacuum drying.
For that reason, vacuum conditions can be confirmed cer­tainly.

Vacuum valve . . . . . . . . . . . . . . . . . . . . . (Fig.4-16)

This valve builts in a check valve, and it is easily possible
to vacuum a refrigerating cycle or check for degree of vac­uum with it.

TOOLS AND EQUIPMENT (R410A)

Gauge Manifold

R410A

R22, R407C

High
pressure
gauge

Compond
gauge

Port size

-0.1 5.3
Mpa

-0.1 3.8
Mpa

1/2UNF
5/16"

-0.1 3.5
Mpa

-0.1 1.7
Mpa

7/16UNF
1/4"

*

1

Charge hose

R410A

R22, R407C

Normal
pressure

Port size

5.1 Mpa

27.4 Mpa

1/2UNF

3.4 Mpa

17.2 Mpa

7/16UNF

*

2

Breaking
pressure

This air conditioner used R410A.
For installation and servicing, it is necessary to prepare the
tools and machines that are diff

erent from the previous

refrigerant.

Mark shows the exclusive use for R410A.

The specification of the gauge is different due
to higher pressure.
The size of connection pipe is also different to
prevent mis-use.

The shape of flare is different for
high pressure condition.

06-01

Gas charging

Vacuuming

Piping work

Pressure control and
Circuit switching

Charge hose
Fig.4-2

Outdoor unit

Electronic charging
scale Fig.4-4

Vacuum pump Fig.4-5

Thermistor vacuum gauge Fig.4-15

Vacuum
Valve Fig.4-16

Safety charger Fig.4-13

Control Valve
Fig.4-14

Vacuum holder Fig.4-6

Leakage tester Fig.4-7

Cleaner Fig.4-8

Collector Fig.4-11

Nitrogen Cylinder
Fig.4-12

Torque wrench
Fig.4-10

Flare tool
Fig.4-9

Gauge manifold
Fig.4-1

Fig.4-3

Refrigerant cylinder

Vacuum control

Low pressure

High pressure

side

side

2. PRECAUTION FOR INSTALLATION

06-02

Precaution for installation

The pipe must be properly pressure rated for R410A
The pipe must be an air-conditioning refrigerant pipe.

Flare and flare nuts

Diameter 1/4” (6.35mm) 3/8” (9.52mm) 1/2” (12.7mm)

Refrigerant

R410A

R22
/R407C

R410A R410A

A 9.1 9.0 13.2 13.0 16.6

16.2

B 13 12 20 15 13 20

C 12 11 16 12.5 19 16

Nut width 17 22 26 24

Always use the flare nut that is packed
with the product.

Do not use existing (for R22) pipes

•

Be sure to use new pipes when replacing
conventional (R22) model with HFC
(R407C, R410A) model.

•

If you use existing pipes, it may cause
resolution of compressor oil by remaining
mineral oil.

3/8” (15.88mm)

R410A

22

29

19.7

25

R22
/R407C

R22
/R407C

R22
/R407C

19.4

23
20

27

3/4” (19.05mm)

R410A

24

36

24

29

R22
/R407C

23.7

29
24

Material

Nominal diameter

(in)

1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1 1/8" 1 1/4" 1 1/2"1 3/8"1"

6.35 9.52 12.70 15.88 19.05 22.22 28.58 31.75 38.1034.9225.40

Outside diameter

(mm)

Wall thickness

(mm)

0.8 0.8 0.8 1.0 1.2 1.0 1.0 1.1 1.31.21.0

1) Allowable tensile stress 33 (N/mm );

>
=

2

2) Allowable tensile stress 61 (N/mm ); 3) Design pressure 4.2MPa.

>
=

2

JIS H3300-C1220T-H or equivalent

2)

COPPER

JIS H3300-C1220T-O or equivalent

1)

COPPER

3)

Pipe diameter, recommended material and wall thickness

A

C

B

Be careful not to mix moisture and

contamination into the pipe

Moisture and contamination

in the pipe is a cause of
trouble.

Air purge

Always use a

vacuum pump

to purge air.

Refrigerant charge

Do it always from the liquid phase
side.

Don't charge from the gas phase side.

Compressor oil is changed

Be careful to handle synthetic oil, since it
resolves easily by moisture and

contamination.

Don't mix new synthetic oil and mineral oil.

It may cause trouble.

We developed new synthetic oil, since HFC
refrigerant doesn't dissolve in mineral (for R22)oil.

06-03

3. PRECAUTION FOR SERVICING

Feature 1 Refrigerant oil is different from before.

Refrigerant oil for
New Refrigerant

Synthetic oil

Ether

Esther

Different point from
previous one

Previously it was
mineral oil.

Absorbent character
is high.

Contamination occurs
when mixed withe other
kind of oil.

Use the gauge manifold and charge hose
for New Refrigerant(HFC), which shall
be segregated from those of R22.

Attach the stop valve on the vacuum pump
and avoid the oil from reverse frow.

It is necessary to use the vacuum pump
which can obtain the high vacuum condition.

Precaution on Tools

Feature 2 New Refrigerant has Approx 1.6 times higher pressure than previous refrigerant.

R410A

High Pressure

Different point from
previous one

Diameter of Service port
has been changed from
1/4 Flare to 5/16 Flare.

It requires the gauge manifold and charge
hose exclusively for R410A.

It requires the flare tool and torque wrench
that satisfies New JIS standard.

Precaution on Tools

R410A R22

1.6 times of R22.

JIS standard of flare
process It became lager

To keep thethickness of
copper tube.
(1/4,3/3=more than 0.8mm)

Previous flare tool + flare adapter can be used as well.

06-04

4. NEW REFRIGERANT R410A

What is HFC ?

Phase-out schedule of HCFC

according to Montreal protocol

1996 20102000 2004 2015 2020 2030

60

40

20

100

(Year)

(%)

80

(HCFC consumption of 1989) +

(CFC consumption of 1989) x 2.8%

65%

35%

10%

0.5%

started control

only service use

total abolition

100% =

0

*

06-05

Ozone Layer depleting mechanism

CFC

CFCl

2

Cl Ozone

(O3)

O

2

ClO

Cl

sunbeam

What is CFC and HCFC?

CFC : Chloro-Fluoro-Carbon

High ODP( ozone depletion potential ) chemical compound, including chlorine. (ODP:0.6-1.0)
For example : R12 (for refrigerator and car air-conditioner)

Low ODP chemical compound, including chlorine and hydrogen. (ODP:0.02-01)

HCFC : Hydro-Chloro-Fluoro-Carbon

For example : R22 (for air-conditioner)

R134a (for Car air conditioner)

HFC3 : Hydro-Fluoro-Carbon

R407C (for air conditioner)

Refrigerant characteristics

R22

Composition

(wt%)

R22

(100)

Boiling Point

- 40.8

Behavior ---

Pressure at 54.5

C

(kPa)

2,151

Temperature Glide

(deg)

0

ODP 0.055

R407C

R32/R125/R134a

(23/25/52)

- 43.6

zeotrope

2,262

5.4

0

R410A

R32/R125

(50/50)

- 51.4

near azeotrope

3,406

0.11

0

06-06

Summary of R407C and R410A characteristics

Pressure (Mpa) Temp ( C)

2.20 37.9

2.25 38.7

2.30 39.6

2.35 40.5

2.40 41.3

2.45 42.1

2.55 43.8

2.60 44.6

2.65 45.3

2.70 46.1

2.75 46.8

2.80 47.6

2.85 48.3

2.90 49.0

2.95 49.8

3.00 50.5

3.05 51.2

3.10 51.9

3.15 52.6

3.20 53.2

3.25 53.9

3.30 54.6

3.35 55.3

3.40 55.9

3.45 56.5

3.50 57.1

2.55 57.8

3.60 58.4

3.65 59.0

3.70 59.6

3.75 60.2

3.80 60.8

3.85 61.4

3.90 52.0

3.95 62.5

4.00 63.1

4.05 63.6

4.10 64.2

4.15 64.8

Temp ( C) Pressure (Mpa)

39 2.27
40 2.32
41 2.38
42 2.44
44 2.57
45 2.63
46 2.69
47 2.76
48 2.83
49 2.90
51 3.04
52 3.11
53 3.18
54 3.26
56 3.41
57 3.49
58 3.57
59 3.65
61 3.82
62 3.90
63 3.99
64 4.08

Desighed pressure of R410A refrigerant

< Pressure Temp >

Relation between R410A condensing temperature and saturated pressure.

< Temp Pressure >

Advantage

Disadvantage

Suitable for

R410A

higher system

performance

Near-Azeotropic

refrigerant

1.6 times higher

(difficult to design against

pressure resistance)

Small Air-Conditioners

pressure than R22

R407C

similar pressure as R22

(possible to design

large equipment)

Zeotropic refrigerant

(handle with care)

Large Air-Conditioners

*

05-07

OIL

• Use new synthetic oils such as ester because HFC series refrigerant has less solubility with mineral oils
conventionally used for R22.

• As these new synthetic oils are easily influenced by moisture and dusts, they must be treated more care-

fully than the conventional lubricating oils.

CAUTION

For installation/servicing, take more precautions than the case of conventional refrigerants to avoid moisture
and dusts entering the refrigerant circuit. Also, for storing parts, more precautions must be taken.

2, 3-WAY VALVE

• Review material O-ring, valve core seal for securing suitability with oil.

CAUTION

Check if the valve is suitable for the refrigerant (model) when replacing.

CAUTION

Check if the compressor is suitable for the refrigerant (model) when replacing. Complete welding within 15
minutes after opening the cap when replacing.

COMPRESSOR

• Use better grade of material for sliding parts for securing good lubrication of sliding part as HFC
refrigerant does not contain chloride.

• Review insulating materials

• Increase pressure resistance strength

CAUTION

During storage, due care must be taken so that foreign matters such as dust and water do not enter.

HEAT EXCHANGER

• Review the water,contaminants controlling level

• Use thinner tube to increase pressure Increase capacity for resistance strength (only outdoor unit)
improving performance

CAUTION

Check if the valve is suitable for the refrigerant (model) when replacing.

4-WAY VALVE

• Review materials

5. DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS

06-08

7 . TROUBLE SHOOTING

R410A

WALL MOUNTED type

INVERTER

1. When the unit does not operate at all (Operation lamp and Timer lamp do not light up)

2. Self Diagnosis Function (Either Operation lamp or Timer lamp is blinking)
* How to operate the self-diagnosis function
* Self- diagnosis table and Check points

3. Tr

ouble shooting method
* Serial signal check
* IPM protection check
* Refrigeration cycle diagnosis

Does not operate at all (Operation Lamp and Timer Lamp do not light up)

[Check Point]

(1) Is the input power voltage from the exclusive circuit AC outlet normal?
(2) Is the AC plug inserted to the AC outlet securely and not loose?

(4) Check if each connector is inserted securely.

[Checking Flow Chart]

YES (AC208/230V)

YES (AC208/230V)

YES (AC208/230V)

YES (DC5V 0.25V)

(IC5, T1 or IC8,11 defective)

YES (DC15V 1V)

YES (DC5Vp-p, Pulse wave of 60Hz)

(The temperature fuse in a terminal
board is open or F1, VA1 defective)

Controller PCB defective

NO

NO

NO

NO

NO

NO

NO

(D1, R1, L1 defective)

07-01

Does not connected cable do wrong wiring?(3)

(C19:DC 8.0V 3V)

YES (C13:DC13.5V 1V)

Is AC input voltage between terminal 1-2 normal ?

Fault of an input power supply.

Is AC voltage between VA 1 normal?

Power supply input circuit

Is DC voltage between terminal of C5 normal?

Switching power circuit

Switching power circuit

Is DC voltage between terminals of C13 and C19 normal?

Is DC voltage between terminals of C22 normal?

IC6 defective

Is DC voltage between terminals of C17 normal?

IC7 defective

Is DC voltage between terminal 1,2 of IC10 normal?

IC4 defective

(The power supply is not supplied to an outdoor unit
terminal board.)
(The connection mistake of an outdoor unit terminal board.)
(Outdoor unit F202 open)

SELF-DIAGNOSIS FUNCTION

This function memorizes the self-diagnosis function (lamp display) in the in door control P.C.Board
when trouble occurs.
(The memory contents are not destroyed even when the power cord is unplugged from the AC outlet.)

The self-diagnosis function (lamp display) can also be switched between major classification display
and minor classification display and precise diagnosis can be made.

Self-diagnosis function [lamp display] (memory reading)

(1) When error occurs, it is indicated by blinking [Operation lamp (Red)] and [Timer lamp (Green)].
(2) Upon pulling out and inserting the AC plug, the starts to operates from remote control.

(At this state, a normal operation indication is performed.)

(3) By pressing [TEST] button of remote control, [Error Indication] is indicated only

during

[3 minutes ST].

(3 minutes ST : 2 minutes 20 seconds from the timing AC plug is ON)

[Lamp display]

3 minutes delay

Turn off Operating Error Indication Normal indication after

3min.ST

Indication

AC Plug ON Start operation Input TEST signal

How to erase Memory

(1)

(Indoor unit buzzer beeps 3 seconds.)

07-02

While [Error indication] is ON by the self-diagnosis function, the memorized contents can be
erased by pressing [Forced Auto Button] on the main unit.

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Wired remote

controller

Error

(Protection)

Diagnosis Method

0.5 sec
2 times

When the indoor unit does not receive the signal for 10 consecutive seconds during the operation >Permanent stop after 30
seconds.

The outdoor unit does not receive the signal for 10 consecutive seconds from the time when the power relay was ON.
>Outdoor unit stops.

OFF

01

07-03

Serial forward transfer error
during the operation

Serial forward transfer error
at starting up operation

Serial reverse transfer error
during the operation

Serial reverse transfer error
at starting up operation

At the start up, the indoor unit does not receive the signal for 10 consecutive seconds from the time when the power relay was ON.
>Permanent stop after 30 seconds.

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor
unit terminals and diagnose the defective location.
(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor
unit terminals and diagnose the defective location.
(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor
unit terminals and diagnose the defective location.
(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

When the outdoor unit does not receive the signal for 10 consecutive seconds during the operation > Outdoor unit stops.

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor
unit terminals and diagnose the defective location.
(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

01

13

13

02

04

The room temperature thermistor detective a abnormai temperature when the power was turned on. > Remote control does not
operate.

[Diagnosis Point]

Check thermistor resistance value (Refer to "Themistor characteristics table").
Controller PCB defective.

The detection value of the indoor heat exchanger thermistor is either open or shoted when the power is ON. > Remote control dose
not operate.

[Diagnosis Point]

Check thermistor resistance value (Refer to "Themistor characteristics table").
Controller PCB defective.

Room temperature therm­istor defective

Indoor heat exchanger
thermistor error

0.5 sec
3 times

0.5 sec
4 times

0.5 sec
5 times

0.5 sec
2 times

0.5 sec
3 times

0.5 sec
2 times

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Wired remote

controller

Error

(Protection)

Diagnosis Method

0.5 sec
2 times

The detection value of the outdoor heat exchanger thermistor is either open or shorted.
> Compressor, outdoor fan : OFF (It automatically releases when the normal value is detected.)

The detection value of the outdoor temperature thermistor is either open or shorted.
> Compressor, outdoor fan : OFF (It automatically releases when the normal value is detected.)

0.5 sec
3 times

00

07-04

Forced auto switch error

Outdoor temperature ther­mistor error

Outdoor heat exchanger
thermistor error

Discharge thermistor error The detection value of the discharge thermistor is either open or shorted.

> Compressor, outdoor fan : OFF (It automatically releases when the normal value is detected.)

[Diagnosis Point]

Check thermistor resistance value (Refer to "Thermistor characteristics table").
Controller PCB defective.

[Diagnosis Point]

Check thermistor resistance value (Refer to "Thermistor characteristics table").
Controller PCB defective.

[Diagnosis Point]

Check thermistor resistance value (Refer to "Thermistor characteristics table").
Controller PCB defective.

Forced auto switch becomes ON for 30 consecutive seconds.
> It indicates the error but the operation continues.

[Diagnosis Point]

Check if forced auto switch is kept pressed.
Forced auto switch defective.
Controller PCB defective.

06

0A

No Display

No Display

No Display

After 2 minutes 20 seconds of stopping operation, the signal from outdoor unit is received even though the main relay is OFF.
> Main relay OFF continues (outdoor unit OFF command)

[Diagnosis Point]

Main relay defective
Controller PCB defective.

The power supply frequency can not be recognized after 4 seconds of power ON.
> Permanent stop.

[Diagnosis Point]

Controller PCB defective.

Main relay error

Power supply frequency
detection error

0.5 sec
3 times

0.5 sec
4 times

0.5 sec
2 times

0.5 sec
3 times

0.5 sec
4 times

0.5 sec
4 times

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Wired remote

controller

Error

(Protection)

Diagnosis Method

0.5 sec
7 times

The air clean operation signal was detected for 1 minute at the time of air clean mode OFF.
> All stop. Not operate remote controller.

Abnormal current value of IPM is detected.
> Permanent stop.

0.5 sec
4 times

No Display

07-05

CT error

IPM protection

Reverde-VDD permanence
stop protection
(Electric air clean power
supply circuit abnormal)

VDD permanence stop
protection
(Electric air clean)

When the air cleanness monitor trial protection operates 4 times.
> Only clean air permanent stop.

[Diagnosis Point]

The front panel is closed.
The foreign body such as dust doesn't adhere.

[Diagnosis Point]

Electric air clean defective.
Controller PCB defective.

[Diagnosis Point]

Heat radiation is blocked (inlet/outlet).
Check if outdoor fan is defetcive (does not rotate).
Controller PCB defective (Refer to after mentioned "IPM diagnosis").
Refrigeration cycle defective (Refer to after mentioned "refrigeration cycle diagnosis").

The current value during the operation after 1 minute from starting up the compressor is 0A.
> permanent stop.

[Diagnosis Point]

Check if CT wire is open.
Controller PCB defective.

21

17

18

1A

1B

The compressor speed does not synchronze with the control signal. (Including start up failure of the compressor).
> permanent stop.

[Diagnosis Point]

Check if 2-way valve or 3-way valve is left open.
Check the compressor (Winding resistance value, loose lead wire).
Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle diagnosis")

Either the outdoor fan motor abnormal current or location error was detected.
> Permanent stop.

[Diagnosis Point]

Fan motor connector loose/ defective contact.
Fan motor defective.
Controller PCB defective.

Compressor location error

Outdoor fan error
(DC motor)

0.5 sec
8 times

0.5 sec
2 times

0.5 sec
3 times

0.5 sec
5 times

0.5 sec
6 times

0.5 sec
5 times

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Wired remote

controller

Error

(Protection)

Diagnosis Method

0.5 sec
2 times

The indoor fan speed is 1/3 of the target frequency after 56 seconds from starting operation or from the time the fan mode was
changed. > Operation stop. (It releases by sending the operation stop signal from the remote controller).

The discharge temperature error is activated.
> Permanent stop.

0.5 sec
6 times

No Display

07-06

Excessive high pressure
protection on cooling

Discharge temperature
error

Indoor fan speed error

Indoor fan lock error The indoor fan speed is 0 rpm after 56 seconds from starting operation or from the time the fan mode was changed.

> Operation stop. (It releases by sending the operation stop signal from the remote controller).

[Diagnosis Point]

Fan motor connector loose /defective contact.
Fan motor defective
Controller PCB defective.

[Diagnosis Point]

Fan motor connector loose /defective contact.
Fan motor defective
Controller PCB defective.

[Diagnosis Point]

Check if 2-way valve or 3-way valve is left open.
Heat radiation is blocked (Inlet /outlet).
Check if outdoor fan is defective (does not rotate).
Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle disagnosis").

Excessive high pressure protection on cooling mode has been activated.
> Compressor, outdoor fan : Off (It releases after 3 minute ST).

[Diagnosis Point]

Heat radiation is blocked (Inlet /outlet).
Check if outdoor fan is defective (does not rotate).
Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle disagnosis").

No Display

0F

24

25

Excessive voltage of DC voltage on PFC circuit in inverter PCB is detected, or the excessive current in the circuit is detected.
> Permanent stop.

[Diagnosis Point]

Controller PCB defective (Refer to after mentioned "PFC circuit diagnosis")

PFC circuit error

0.5 sec
3 times

0.5 sec
2 times

0.5 sec
3 times

0.5 sec
4 times

0.5 sec
7 times

0.5 sec
8 times

Serial Signal Receiving Error

[Check Point] Check which has a cause of error, either Indoor unit or Outdoor unit.

* Remove indoor unit front panel and cable xlampers and keep the terminal block clear so that it can be

measured with a meter.

* Remove AC power and reset the power, and press Test Operation switch on remote control.

[Check Procedure]

[Indoor Unit Check]

CAUTION: Keep out hands from terminal base and electrical components. Voltage is
applied on them and you may get electric shock.

NO

YES

07-07

[Outdoor Unit Check]

Indoor unit control unit is normal.

Check outdoor unit control unit.

Check cable wiring of terminal base of indoor
and outdoor unit correctly connected as numbered.

Does voltage AC208 to 230V appear between NO
terminal 1 and 2 of indoor unit terminal base?

Check cable wiring of terminal base.

Does indoor unit start to operate? Conduct the inspection on "no operation at all".

Outdoor unit controller PCB board failure.

Measure voltage between terminal 2 and 3 of
indoor unit terminal base. Is it normal?

Indoor unit controller PCB IC10 failure.

Does voltage AC208 to 230V appear at NO
DC voltage terminal?

Check broken fuse, wiring connection.

Does voltage AC208 to 230V appear between
terminai 4 and 5 of outdoor unit terminal base?

Check power supply connection.

NO

NO

NO

NO

YES

YES

YES

YES

YES

IPM Protection

[Checking Points]

Check the following points and locae the cause in the outdoor unit.

[Cause]

(1) Compressor failure
(2) Refrigeration cycle failure
(3) PC Board defective
(4) IPM defective
(5) Incorrect wiring

[First step]

Measure the DC voltage at terminals (between Electrolytic Capacitor and discharge resistance)

in the Inverter Controller Assy, and make sure it is lower than DC5V.

Check point (1)

Open the Inverter Controller Assy

Yes(Normal)

Go to Check point (2)

and check if there is abnormal points.

No(Abnormal)

Incorrect wiring > Correct and recheck
Parts touched > Correct and recheck

Parts broken > Change the broken part

Check point (2)

Turn on the power and press TEST button

Yes(Rotating)

Go to Check point (3)

on Remote Control.

No(Not rotating)

IPM or PCB defective > Replace PCB

Is the outdoor fan rotating?

Check point (3)

Operate the unit for certain time and

Yes(Operating)

The unit is normal.

check if the compressor is operating.

No(Not operating)

IPM or PCB defective > Replace PCB

Recheck

Operate the unit for certain time and Yes(Operating) > Check completed
check if the compressor is operating. No(Not operating) > Return to the start

If it is higher than 5V, wait until the discharging is over.

07-08

(The above resistance value is a typical value. There is some distribution. A

Trouble Shooting of Refrigerant Cycle

[Diagnosis Table for Defective Component]

: Item of most possible cause

IPM Protection

Compressor

Location error

Discharge

Temperature Error

Cooling High

Pressure

Protection

Refrigerant leak

Compressor failure(*)

EEV failure (*)

Thermistor failure (*)

(*) Trouble Shooting Method

(1) Checking method of the compressor failure

Insert the AC plug and start up the cooling operation. Input Test operation signal and check if the
compressor operates.
If it does not operate, measure the resistance value of compressor windings between U-V, V-W,
W-U.
If any of the resistance value between U-V, V-W, W-U is not same as others, the compressor is
defective.

Compressor Failure

NORMAL

ASU9/12RLQ Compressor Case Temperature at 68°F(20°C): 0.710 ohm

ASU18CL/RL Compressor Case Temperature at 68°F(20°C): 0.730 ohm

s it also changes by the

compressor temperature, the measured value may be much different from the above table when
measured right after stopping operation.)

(2) Checking method of EEV failure

- Insert the AC plug and start up the operation. Check if the EEV operates just before compressor is turned
on. (Touch EEV by hand and check it.)
If it does not operate, check if the coil or connector of EEV is removed or loose.
If it operates, check the discharge thermistor / outdoor heat exchanger thermistor / indoor heat
exchanger thermistor. (Refer to (3) for checking method.)

(3) Checking method of Thermistor

- Check each thermistor if it is removed or the connector is loose.
If there is no problem, remove the connector of the thermistor from the PCB and check the resistance
value (refer to the thermitor characteristics table).

07-09

8 . APPENDING DATA

R410A

WALL MOUNTED type

INVERTER

1. Jumper setting of Indoor unit and Outdoor unit

2. Outdoor unit Pressure Value and Total Electric Current Curve

3. T

hermistor Resistance Values

4. Capacity/Input data

JP (Jumper) Setting

[Indoor Unit]

ASU9/12RLQ

ASU18CL/RL

- Remote control custom code
When multiple number of indoor units are installed in the same room, erroneous receipt of the signal can
be avoided by setting up the remote control custom code separately.
To set up the remote control custom code, always set up the same code on both indoor unit PCB and
remote control PCB.
(When the indoor unit PCB is changed to Code B, it can not receive the signal unless remote control PCB
is also changed to Code B.)

Indoor Unit Remote Control

JM3(JP)

J4 (JP)

Code A (Default) YES YES
Code B NO NO

- Auto Restart

It is possible to disengage Auto Restart function if it is not needed.

Indoor Unit

JM2 (JP)

With Auto Restart function
(Default)

YES

Without Auto Restart
function

NO

[Outdoor Unit]

AOU9/12RLQ, AOU18CL/RL

JP

JM500
Normal Preheat YES
Higher Preheat NO

- it is possible to select the higher or standard level of preheating function.

- When it is set up at the higher level of preheat, the magnetic noise of the compressor becomes higher.

08-01

Outdoor Unit Low Pressure Value and Outdoor Total Electric Current Curve (Cooling)

Model Name : ASU9RLQ, ASU12RLQ

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

60Hz - 230V

Operation

condition

TEST mode (Cooling), Hi Fan, Horizontal direction, Front air flow

Measuring

method

Caution

Start operation with the condition of the Indoor Unit air filter clean.

[Constant Frequency Operation Method (Test mode)]

1. Operate on Colling mode, and press TEST button of remote control.

2. Operate continuously for 30 minutes. (After 60 minutes of operation, Test mode is released automatically.)

(1) Indoor/Outdoor Temperature - Outdoor Low Pressure Curve

ASU9RLQ series ASU12RLQ series

(2) Indoor/Outdoor Temperature - Outdoor Total Electric Current Curve

ASU9RLQ series ASU12RLQ series

Measure the low pressure with the pressure meter at the service valve. Measure the
outdoor unit overall current with the current clamp meter at Power Cable.

0.80

0.90

1.00

1.10

1.20

1.30

1.40

63.5

(17.5)

68

(20)

72.5

(22.5)77(25)

81.5

(27.5)86(30)

90.5

(32.5)

In/Outdoor ambient temperature °F(°C)

Outdoor High Pressure (Mpa)

Relative Humidity 50%
Relative Humidity 60%
Relative Humidity 70%

2.00

2.10

2.20

2.30

2.40

2.50

2.60

2.70

In/Outdoor ambient temperature °F(°C)

Outdoor Total Electric Current (A)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

0.7

0.75

0.8

0.85

0.9

0.95

1

1.05

1.1

1.15

1.2

In/Outdoor ambient temperature °F(°C)

Outdoor High Pressure (MPa)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

3

3.2

3.4

3.6

3.8

4

4.2

In/Outdoor ambient temperature °F(°C)

Outdoor Total Electric Current (A)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

length

08-02

63.5

(17.5)

68

(20)

72.5

(22.5)77(25)

81.5

(27.5)86(30)

90.5

(32.5)

63.5

(17.5)68(20)

72.5

(22.5)77(25)

81.5

(27.5)86(30)

90.5

(32.5)

63.5

(17.5)68(20)

72.5

(22.5)77(25)

81.5

(27.5)86(30)

90.5

(32.5)

Outdoor Unit High Pressure Value and Outdoor Total Electric Current Curve (Heating)

Model Name : ASU9RLQ, ASU12RLQ

[Condition]

Ambient

temperature

Indoor 15 - 23degC, Outdoor 2 - 12degC

Refrigerant

amount

Standard amount

Piping

7.5m (Height difference 1m)

Power

voltage

60Hz - 230V

Operation

condition

TEST mode (Heating), Hi Fan, Lower direction, Front air flow

Measuring

method

Caution

Start operation with the condition of the Indoor Unit air filter clean.

[Constant Frequency Operation Method (Test mode)]

1. Operate on Heating mode, and press TEST button of remote control.

2. Operate continuously for 30 minutes. (After 60 minutes of operation, Test mode is released automatically.)

(1) Indoor/Outdoor Temperature - Outdoor High Pressure Curve

ASU9RLQ series

ASU12RLQ series

(2) Indoor/Outdoor Temperature - Outdoor Total Electric Current Curve

ASU9RLQ series

ASU12RLQ series

Measure the high pressure with the pressure meter at the service valve. Measure the
outdoor unit overall current with the current clamp meter at Power Cable.

2.10

2.20

2.30

2.40

2.50

2.60

2.70

2.80

2.90

32
(0)

35.6
(2)

39.2
(4)

42.8
(6)

46.4
(8)50(10)

53.6
(12)

57.2
(14)

Outdoor ambient temperature °F(°C)

Outdoor High Pressure (Mpa)

Indoor inlet temp 59°F(15°C)

Indoor inlet temp 68°F(20°C)

Indoor inlet temp 74°F(23°C)

3.50

3.60

3.70

3.80

3.90

4.00

4.10

4.20

4.30

4.40

Outdoor ambient temperature °F(°C)

Outdoor Total Electric Current (A)

2.40

2.50

2.60

2.70

2.80

2.90

3.00

3.10

3.20

3.30

Outdoor ambient temperature °F(°C)

Outdoor High Pressure (Mpa)

5.00

5.20

5.40

5.60

5.80

6.00

6.20

6.40

Outdoor ambient temperature °F(°C)

Outdoor Total Electric Current (A)

length

08-03

32
(0)

35.6
(2)

39.2
(4)

42.6
(6)

46.4
(8)50(10)

53.6
(12)

57.2
(14)

32
(0)

35.6
(2)

39.2
(4)

42.8
(6)

46.4
(8)50(10)

53.6
(12)

57.2
(14)

32
(0)

35.6
(2)

39.2
(4)

42.6
(6)

46.4
(8)50(10)

53.6
(12)

57.2
(14)

Indoor inlet temp 59°F(15°C)

Indoor inlet temp 68°F(20°C)

Indoor inlet temp 74°F(23°C)

Indoor inlet temp 59°F(15°C)

Indoor inlet temp 68°F(20°C)

Indoor inlet temp 74°F(23°C)

Indoor inlet temp 59°F(15°C)

Indoor inlet temp 68°F(20°C)

Indoor inlet temp 74°F(23°C)

Outdoor Unit Low Pressure Value and Outdoor Total Electric Current Curve (Cooling)

Model Name : ASU18CL, ASU18RL

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

60Hz - 230V

Operation

condition

TEST mode (Cooling), Hi Fan, Horizontal direction, Front air flow

Measuring

method

Caution

Start operation with the condition of the Indoor Unit air filter clean.

[Constant Frequency Operation Method (Test mode)]

1. Operate on Colling mode, and press TEST button of remote control.

2. Operate continuously for 30 minutes. (After 60 minutes of operation, Test mode is released automatically.)

(1) Indoor/Outdoor Temperature - Outdoor Low Pressure Curve

ASU18CL/RL series

(2) Indoor/Outdoor Temperature - Outdoor Total Electric Current Curve

ASU18CL/RL series

Measure the low pressure with the pressure meter at the service valve. Measure the
outdoor unit overall current with the current clamp meter at Power Cable.

0.7

0.8

0.9

1

1.1

1.2

1.3

In/Outdoor ambient temperature °F(°C)

Outdoor Low Pressure (Mpa)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

4

4.5

5

5.5

6

In/Outdoor ambient temperature °F(°C)

Outdoor Total Electric Current (A)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

length

08-04

59

(15)

68

(20)

77

(25)

86

(30)

95

(35)

59

(15)

68

(20)

77

(25)

86

(30)

95

(35)

Outdoor Unit High Pressure Value and Outdoor Total Electric Current Curve (Heating)

Model Name : AS18RL

[Condition]
Ambient

temperature

Indoor 15 - 23degC, Outdoor 2 - 12degC

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

60Hz - 230V

Operation

condition

TEST mode (Heating), Hi Fan, Lower direction, Front air flow

Measuring

method

Caution

Start operation with the condition of the Indoor Unit air filter clean.

[Constant Frequency Operation Method (Test mode)]

1. Operate on Heating mode, and press TEST button of remote control.

2. Operate continuously for 30 minutes. (After 60 minutes of operation, Test mode is released automatically.)

(1) Indoor/Outdoor Temperature - Outdoor High Pressure Curve

ASU18RL

(2) Indoor/Outdoor Temperature - Outdoor Total Electric Current Curve

ASU18RL

Measure the high pressure with the pressure meter at the service valve. Measure the
outdoor unit overall current with the current clamp meter at Power Cable.

3

3.2

3.4

3.6

3.8

4

32
(0)

41

(5)

50

(10)

59

(15)

Outdoor ambient temperature °F(°C)

High-pressure of outdoor unit (Mpa)

6.5

7

7.5

8

8.5

9

Outdoor ambient temperature °F(°C)

Outdoor Total Electric Current (A)

length

Indoor inlet temp :59°F(15°C)
Indoor inlet temp :68°F(20°C)
Indoor inlet temp :73°F(23°C)

08-05

32

(0)

41
(5)

50

(10)

59

(15)

Indoor inlet temp :59°F(15°C)
Indoor inlet temp :68°F(20°C)
Indoor inlet temp :73°F(23°C)

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

32

(0)50(10)68(20)86(30)

104

(40)

122
(50)

140
(60)

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.00

32

(0)

68

(20)

104

(40)

140

(60)

176

(80)

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.00

32
(0)68(20)

104
(40)

140
(60)

176
(80)

212

(100)

248

(120)

0.00

10.00

20.00

30.00

40.00

50.00

0.00

20.00

40.00

60.00

80.00

100.00

120.00

Thermistor resistance values

Characteristics of room temperature thermistor

Resistance (k )

Temperature °F(°C)

Characteristics of heat exchanger thermistor (Indoor)

Resistance (k )

Temperature °F(°C)

Characteristics of discharge thermistor

Resistance (k )

Temperature °F(°C)

Resistance (k )

Temperature °F(°C)

Characteristics of heat exchanger thermistor (Outdoor)

Resistance (k )

Temperature °F(°C)

Characteristics of outdoor temperature thermistor

08-06

Temp °F(°C) Voltage (V)

32.00

41.00

50.00

59.00

68.00

77.00

86.00

95.00

104.00

113.00

122.00

131.00

140.00

149.00

158.00

167.00

176.00

185.00

194.00

203.00

212.00

(0.00)

(5.00)

(10.00)

(15.00)

(20.00)

(25.00)

(30.00)

(35.00)

(40.00)

(45.00)

(50.00)

(55.00)

(60.00)

(65.00)

(70.00)

(75.00)

(80.00)

(85.00)

(90.00)

(95.00)

(100.00)

33.62

25.93

20.18

15.84

12.54

10.00

8.04

6.51

5.30

4.35

3.59

2.98

2.47

2.09

1.76

1.49

1.27

1.09

0.93

0.81

0.70

1.15

1.39

1.66

1.94

2.22

2.50

2.77

3.03

3.27

3.48

3.68

3.85

4.00

4.14

4.25

4.35

4.44

4.51

4.57

4.63

4.67

Room temperature thermistor

Resistance k

Temp °F(°C) Voltage (V)

32.00

41.00

50.00

59.00

68.00

77.00

86.00

95.00

104.00

113.00

122.00

131.00

140.00

149.00

158.00

167.00

176.00

185.00

194.00

203.00

212.00

(0.00)

(5.00)

(10.00)

(15.00)

(20.00)

(25.00)

(30.00)

(35.00)

(40.00)

(45.00)

(50.00)

(55.00)

(60.00)

(65.00)

(70.00)

(75.00)

(80.00)

(85.00)

(90.00)

(95.00)

(100.00)

0.18

0.24

0.30

0.31

0.38

0.47

0.70

0.84

0.99

1.16

1.34

1.54

1.74

1.95

2.16

2.36

2.57

2.76

2.95

3.13

3.30

Discharge thermistor

Resistance k

221.00 (105.00) 3.45

230.00 (110.00) 3.60

239.00 (115.00) 3.73

248.00 (120.00)

175.70

134.93

104.59

81.79

64.50

51.27

41.07

33.13

26.91

22.01

18.10

14.98

12.47

10.44

8.78

7.42

6.31

5.38

4.61

3.97

3.43

2.98

2.59

2.26

1.99 3.85

Temp °F(°C) Voltage (V)

32.00

41.00

50.00

59.00

68.00

77.00

86.00

95.00

104.00

113.00

122.00

131.00

140.00

149.00

158.00

167.00

176.00

185.00

194.00

203.00

212.00

(0.00)

(5.00)

(10.00)

(15.00)

(20.00)

(25.00)

(30.00)

(35.00)

(40.00)

(45.00)

(50.00)

(55.00)

(60.00)

(65.00)

(70.00)

(75.00)

(80.00)

(85.00)

(90.00)

(95.00)

(100.00)

176.03

134.23

103.34

80.28

62.91

49.70

39.57

31.74

25.64

20.85

17.06

14.10

11.64

9.69

8.12

6.83

5.78

4.91

4.19

3.59

3.09

1.10

1.36

1.63

1.92

2.21

2.51

2.79

3.06

3.30

3.53

3.73

3.90

4.55

4.19

4.30

4.40

4.48

4.55

4.61

4.66

4.71

Indoor heat exchanger thermistor

Resistance k

Temp °F(°C) Voltage (V)

49.20

36.58

27.51

20.91

16.05

12.44

9.73

7.67

6.10

4.89

3.95

3.21

2.62

2.16

1.79

1.49

1.25

1.05

0.89

0.76

0.65

2.66

3.02

3.35

3.64

3.89

4.09

4.26

4.40

4.51

4.60

4.67

4.73

4.78

4.81

4.85

4.87

4.89

4.91

4.92

4.93

4.94

Outdoor heat exchanger thermistor

Resistance k

0.56 4.95

0.48 4.96

0.41 4.96

32.00

41.00

50.00

59.00

68.00

77.00

86.00

95.00

104.00

113.00

122.00

131.00

140.00

149.00

158.00

167.00

176.00

185.00

194.00

203.00

212.00

(0.00)

(5.00)

(10.00)

(15.00)

(20.00)

(25.00)

(30.00)

(35.00)

(40.00)

(45.00)

(50.00)

(55.00)

(60.00)

(65.00)

(70.00)

(75.00)

(80.00)

(85.00)

(90.00)

(95.00)

(100.00)

-4.00 (-20.00)

5.00 (-15.00)

14.00 (-10.00)

23.00 (-5.00)

0.36 4.97

Temp °F(°C) Voltage (V)

1.25

1.56

1.90

2.26

2.61

2.94

3.25

3.52

3.76

3.97

4.14

4.28

4.41

4.51

4.59

4.65

4.71

4.76

4.79

4.83

4.85

Outdoor temperature thermistor

Resistance k

4.87

4.89

4.91

115.24

84.21

62.28

46.58

35.21

26.88

20.72

16.12

12.64

10.00

7.97

6.40

5.18

4.21

3.45

2.85

2.36

1.97

1.65

1.39

1.18

1.00

0.85

0.73

0.63 4.92

32.00

41.00

50.00

59.00

68.00

77.00

86.00

95.00

104.00

113.00

122.00

131.00

140.00

149.00

158.00

167.00

176.00

185.00

194.00

203.00

212.00

(0.00)

(5.00)

(10.00)

(15.00)

(20.00)

(25.00)

(30.00)

(35.00)

(40.00)

(45.00)

(50.00)

(55.00)

(60.00)

(65.00)

(70.00)

(75.00)

(80.00)

(85.00)

(90.00)

(95.00)

(100.00)

-4.00 (-20.00)

5.00 (-15.00)

14.00 (-10.00)

23.00 (-5.00)

32

(0)68(20)

104

(40)

140
(60)

176
(80)

-4

(-20)

32
(0)68(20)

104
(40)

140
(60)

-4

(-20)

ASU9RLQ Capacity/Input data

<Capacity>

<Input>

Defrosting operation is performed when temperature is less than 42 degrees F.
Frost appears on an outdoor unit heat exchanger at 42 or less degrees F.

Solid line:Integral capacity/Input containing the defrosting cycle.
Dotted line:Capacity/Input which does not contain the defrosting cycle.

Heating

40%

50%

60%

70%

80%

90%

100%

110%

120%

130%

140%

150%

160%

170%

180%

Outdoor DB( F)

Capacity(%)

70%

80%

90%

100%

110%

120%

130%

140%

150%

160%

170%

180%

190%

200%

210%

220%

Outdoor DB( F)

Input(%)

32 41 50 59 68 7723145

Rated
operation

75

75

IndoorDB:70 F

Maximum

42

42

IndoorDB:70 F

Without Frost

Without Frost

With Frost

32 41

50

59

68

7723

145

operation

Maximum
operation

Rated
operation

Without Frost

Without Frost

With Frost

*

*
*

08-07

60%

70%

80%

90%

100%

110%

120%

130%

140%

150%

14 32 50 68 86 104

30%

40%

50%

60%

70%

80%

90%

100%

110%

120%

130%

14 32 50 68 86 104

Indoor:80/65

115

115

Indoor:80/65

<Capacity>

<Input>

Both capacity and input change largely when temperature is 50 or less degrees F, as outdoor fan speed
is decreased due to low ambient temperature cooling control.

Both capacity and input change more largely at less than 32 degrees F of ambient temperature as
outdoor fan speed is decreased further.

Cooling

Outdoor DB( F)

Capacity(%)

Input(%)

Outdoor DB( F)

*

*

08-08

40%

50%

60%

70%

80%

90%

100%

110%

120%

130%

140%

150%

Capacity(%)

32 50 59 68

7723

145

41

70%

80%

90%

100%

110%

120%

130%

140%

150%

160%

170%

180%

Input(%)

32

41 50

59

68

7723

145

75

75

42

42

ASU12RLQ Capacity/Input data

<Capacity>

Heating

operation

IndoorDB:70 F

Without Frost

Without Frost

With Frost

Maximum
operation

Rated

<Input>

Maximum
operation

Rated
operation

Without Frost

Without Frost

With Frost

Defrosting operation is performed when temperature is less than 42 degrees F.
Frost appears on an outdoor unit heat exchanger at 42 or less degrees F.

Solid line:Integral capacity/Input containing the defrosting cycle.
Dotted line:Capacity/Input which does not contain the defrosting cycle.

*

*
*

Outdoor DB( F)

Outdoor DB( F)

IndoorDB:70 F

08-09

60%

70%

80%

90%

100%

110%

120%

130%

140%

150%

Capacity(%)

14 32 50 68 86 104

30%

40%

50%

60%

70%

80%

90%

100%

110%

120%

Input(%)

14 32 50 68 86 104

115

66

66

115

<Capacity>

<Input>

Cooling

Indoor:80/65

Indoor:80/65

Outdoor DB( F)

Outdoor DB( F)

Both capacity and input change largely when temperature is 50 or less degrees F, as outdoor fan speed
is decreased due to low ambient temperature cooling control.
Both capacity and input change more largely at less than 32 degrees F of ambient temperature as
outdoor fan speed is decreased further.

*

*

Both capacity and input decrease when temperature is 66 or less degrees F, for compressor
frequency restrictions operate.

Both capacity and input decrease when temperature is 104 or more degrees F, as compressor speed is
decreased due to current release protection.

*

*

08-10

30%

40%

50%

60%

70%

80%

90%

100%

120%

110%

130%

140%

Capacity(%)

42

7563

54

32 41 50

59 68

772314

5

60%

70%

80%

90%

100%

110%

120%

130%

140%

150%

160%

170%

180%

Input(%)

42 75

63

54

32 41 50 59 68 772314

5

ASU18RL Capacity/Input data

<Capacity>

Heating

operation

IndoorDB:70 F

Without Frost

Without Frost

Without Frost

Without Frost

With Frost

With Frost

Maximum operation
Current release works

Maximum operation
Current release works

Current release works

Current release works

Rated

operation

Rated

IndoorDB:70 F

Outdoor DB( F)

Outdoor DB( F)

Defrosting operation is performed when temperature is less than 42 degrees F.
Frost appears on an outdoor unit heat exchanger at 42 or less degrees F.

Solid line:Integral capacity/Input containing the defrosting cycle.
Dotted line:Capacity/Input which does not contain the defrosting cycle.

*

*
*

<Input>

08-11

60%

70%

80%

90%

100%

110%

120%

130%

140%

150%

Capacity(%)

66

11532 50 68 10486

14

20%

30%

40%

50%

60%

70%

80%

90%

100%

110%

120%

Input(%)

66

32 50 68 1048614 115

Indoor:80/65

Indoor:80/65

<Capacity>

<Input>

Cooling

Outdoor DB( F)

Outdoor DB( F)

Both capacity and input change largely when temperature is 50 or less degrees F, as outdoor fan speed
is decreased due to low ambient temperature cooling control.
Both capacity and input change more largely at less than 32 degrees F of ambient temperature as
outdoor fan speed is decreased further.

*

*

Both capacity and input decrease when temperature is 66 or less degrees F, for compressor
frequency restrictions operate.
Both capacity and input decrease when temperature is 104 or more degrees F, as compressor speed is
decreased due to current release protection.

*

*

08-12

9 . REPLACEMENT PARTS

R410A

WALL MOUNTED type

INVERTER

REPLACEMENT PARTS

09-01

Models : ASU9RLQ

ASU12RLQ

REPLACEMENT PARTS

09-02

Models : ASU9RLQ

ASU12RLQ

REPLACEMENT PARTS

09-03

Models : AOU9RLQ

AOU12RLQ

REPLACEMENT PARTS

09-04

Models : ASU18CL

ASU18RL

REPLACEMENT PARTS

09-05

Models : ASU18CL

ASU18RL

REPLACEMENT PARTS

09-06

Models : ASU18CL

ASU18RL

REPLACEMENT PARTS

09-07

PROCESS ATTACHMENT OF INVERTER ASSY

INVERTER ASSY

Tap tight screw

(TERMINAL BRACKET)

Do not run up the terminal board mounting metal
on 2 location of hook.

THERMISTOR (OUT TEMP) is passed here.

(SEPARATER)

1

1

2

2

A

A

REPLACEMENT PARTS

09-08

PROCESS

1

8

6

6

5

4

4

3

2

1

2

3

4
5

6

7

8

The leads are connected with INVERTER ASSY

MOTOR LEAD

THERMISTOR ASSY (COND, DIS)

THERMISTOR (OUT TEMP)

SOLENOID LEAD

COIL (EXP VLV) LEAD

COMP LEAD

WIRE CLAMPER

REACTOR LEAD

Cross and

Run the wire in front of bytly rubber sheet.

A

A

B

4

4

8

is fixed to HOLDER

REPLACEMENT PARTS

09-09

PROCESS

7

6

7

The leads are connected with INVERTER ASSY

(TERMINAL COVER)

PCB side

COMP side

(BINDER)

B

D

D

E

E

0~10mm

COMP LEAD is passed TERMINAL COVER the under.

REPLACEMENT PARTS

09-10

PROCESS

1

1

2

3

4

Fixing of Thermistor lead and motor lead.

THERMISTOR ASSY (SUC/DIS)

THERMISTOR (OUT TEMP)

MOTOR LEAD

COIL(EXP VLV)

0~5mm

200~230mm

10 10mm

E - E

B - B

190~220mm

160~190mm

120~140mm

B B

AA

1

2

2

2

4

4

4

3

3

3

1

1

1

10 . INSTALLATION MANUAL

R410A

WALL MOUNTED type

INVERTER

12

3

4

12

3

45

G

G

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(P/N 9315140050-01) ENGLISH

(MODEL: ASU18RL/AOU18RL; ASU18CL/AOU18CL)

IMPORTANT!
Please Read Before Starting

This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to
install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

• Carefully read this instruction booklet before beginning.

• Follow each installation or repair step exactly as shown.

• Observe all local, state, and national electrical codes.

• Pay close attention to all danger, warning, and caution notices given in

this manual.

WARNING:

This symbol refers to a hazard or unsafe practice which
can result in severe personal injury or death.

CAUTION:

This symbol refers to a hazard or unsafe practice which
can result in personal injury and the potential for product
or property damage.

• Hazel alerting symbols

Electrical

Safety / alert

If Necessary, Get Help

These instructions are all you need for most installation sites and mainte­nance conditions. If you require help for a special problem, contact our
sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation
or maintenance service, including failure to follow the instructions in this
document.

SPECIAL PRECAUTIONS

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL
INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing are completed
or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully
refer to the wiring diagram and these instructions when wiring. Improper
connections and inadequate grounding can cause accidental injury
or death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause overheating at con-

nection points and a possible fire hazard.

5 cm or over

The basic installation work procedures are the same as conventional refrigerant (R22) models.

However, pay careful attention to the following points:

(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant(R22) mod-

els, some of the piping and installation and service tools are special.(See the table below.)

Especially, when replacing a conventional refrigerant(R22) model with a new refrigerant R410A
model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.

(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent

erroneous charging with conventional refrigerant(R22) and for safety. Therefore, check
beforehand.[The charging port thread diameter for R410A is 1/2 threads per inch.]

(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with

refrigerant(R22) models. Also, when storing the piping ,securely seal the opening by pinching,
taping, etc.

(4) When charging the refrigerant, take into account the slight change in the composition of the gas

and liquid phases, and always charge from the liquid phase side whose composition is stable.

This air conditioner uses new refrigerant HFC (R410A).

(1) Cut a 3-2/16’’(80 mm) diameter hole in the wall at the position shown

in (Fig.1).

(2) When cutting the wall hole at the inside of the wall hook bracket,

cut the hole within the range of the left and right center marks
3/8’’(10 mm) below the installation frame.

When cutting the wall hole at the outside of the wall hook bracket,

cut the hole at least 3/8’’(10 mm) below less.

(3) Cut the hole so that the outside end is lower 3/16’’ to 3/8’’ (5 to 10 mm)

than the inside end.

(4) Always align the center of the wall hole. If misaligned, water leak-

age will occur.

(5) Cut the wall pipe to match the wall thickness, stick it into the wall

cap, fasten the cap with vinyl tape, and stick the pipe through the
hole. (The connection pipe is supplied in the installation set.)
(Fig.1)

(6) For left piping and right piping, cut the hole a little lower so that

drain water will flow freely. (Fig.1)

Fig. 1

(1) Install the wall hook bracket so that it is correctly positioned hori-

zontally and vertically. If the wall hook bracket is titled, water will
drip to the floor.

(2) Install the wall hook bracket so that it is strong enough to with-

stand the weight of an adult.

● Fasten the wall hook bracket to the wall with 6 or more screws

through the holes near the outer edge of the bracket.

● Check that there is no rattle at the wall hook bracket.

Fig. 2

4. CONNECTING THE PIPING

● For left piping and left rear piping, align the marks on the wall

hook bracket and shape the connection pipe.

● Bend the connection piping at a bend radius of 2-3/4’’(70 mm) or

more and install no more than 1-3/8’’(35 mm) from the wall.

● After passing the indoor piping and drain hose through the wall

hole, hang the indoor unit on the hooks at the top and bottom of
the wall hook bracket.

[Installing the indoor unit]

● Hang the indoor unit from the hooks at the top of the wall hook

bracket.

● Insert the spacer, etc. between the indoor unit and the wall hook

bracket and separate the bottom of the indoor unit from the wall.

Fig. 4

After hooking the indoor unit to the top hook, hook the fittings of the
indoor unit to the two bottom hooks while lowering the unit and
pushing it against the wall.

Top hooks

Indoor unit

(Fitting)

Bottom hooks

Wall hook
bracket

Indoor unit

Wall hook bracket

(Spacer)

CONNECTION

(1) Install the outdoor unit wall cap (supplied with the optional in-

stallation set or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface and tightening the

nut hand tight, tighten the nut to the specified tightening torque

with a torque wrench. (Tighten the flare nut of the outdoor unit

3-way valve after air purging.)

FLARING

(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe

and remove the burrs.
(3) Insert the flare nut onto the pipe and flare the pipe with a flaring

tool.

Check if [L] is flared uniformly
and is not cracked or scratched.

L dimension

Thin pipe 1/4” (6.35 mm)dia.......1/16” (1.4 to 1.7 mm)

Thick pipe 1/2” (12.7 mm)dia....... 5/64” (1.9 to 2.2 mm)

Flare nut

1/4” (6.35 mm)dia.

1/2” (12.7 mm)dia.

Tightening torque

11.57 to 13.02 ft•lbs
(160 to 180 kgf•cm)

36.17 to 39.78 ft•lbs
(500 to 550 kgf•cm)

Table 2 Flare nut tightening torque

Fig. 5

Tighten with two wrenches.

Torque wrench

Wrench (fixed)

Flare nut

Indoor unit pipe

Connection pipe

To prevent gas leakage,
coat the flare surface
with refrigerator oil.

Connection pipe
(1/4” (6.35 mm) dia.)

Connection pipe
(1/2’’(12.7 mm) dia.)

Align the marks.
Bend 2-3/4’’(R70)
with a pipe bender

BENDING PIPES

The pipes are shaped by your hands. Be careful not to collapse them.

Do not bend the pipes in an angle more than 90°.
When pipes are repeatedly bent or stretched, the material will harden,
making it difficult to bend or stretch them any more. Do not bend or stretch
the pipes more than three times.

OK NO

Extend the pipe
by unwinding it.

SELECTING THE MOUNTING
POSITION

INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS

Decide the mounting position with the customer as follows:

1. INDOOR UNIT

(1) Install the indoor unit level on a strong wall which is not subject

to vibration.

(2) The inlet and outlet ports should not be obstructed : the air should

be able to blow all over the room.
(3) Install the unit near an electric outlet or special branch circuit.
(4) Do not install the unit where it will be exposed to direct sunlight.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the drain pipe can be easily installed.
(7) Take servicing, etc. into consideration and leave the spaces shown

in (Fig. 7). Also install the unit where the filter can be removed.

2. OUTDOOR UNIT

(1) If possible, do not install the unit where it will be exposed to di-

rect sunlight. (If necessary, install a blind that does not interfere

with the air flow.)
(2) Do not install the unit where a strong wind blows or where it is

very dusty.
(3) Do not install the unit where people pass.
(4) Take your neighbors into consideration so that they are not dis-

turbed by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 7 so that the air flow is not blocked.

Also for efficient operation, leave open three of the four direc-

tions front, rear, and both sides.

WARNING

Install at a place that can withstand the weight of the
indoor and outdoor units and install positively so that
the units will not topple or fall.

CAUTION

(1) Do not install where there is the danger of com-

bustible gas leakage.
(2) Do not install near heat sources.
(3) If children under 10 years old may approach the

unit, take preventive measures so that they can-

not reach the unit.

[Indoor unit piping direction]

The piping can be connected in the five directions indicated by 1, 2, 3,
4, and 5 in (Fig. 6). When the piping is connected in direction 2 or 5, cut

along the piping groove in the side of the front cover with a hacksaw.
When connecting the piping in direction 3, cut a notch in the thin wall at
the front bottom of the front cover.

Fig. 6

Fig. 7

[INDOOR UNIT]

[OUTDOOR UNIT]

2-2/5”(6 cm) or over

Wall hook bracket

2”(5 cm)
or over

3- 3/5”(9 cm)
or over

60”(150 cm) or over

(Wall cap)

Remote
control unit

Tapping
screw
(small)

Remote
control
unit holder

4”(10 cm)
or over

24”(60 cm)
or over

4”(10 cm)
or over

12”(30 cm)
or over

12”(30 cm)
or over

95” (240 cm)
or over

Connection Cord

14AWG

1. Check if the piping connections are secure.

2. Check that the stems of 2-way valve and 3-way valve are closed
fully.

3. Connect the gauge manifold charge hose to the charging port
of the 3-way valve (side with the projection for pushing in the
valve core).

4. Open the low pressure side valve of the gauge manifold fully.

5. Operate the vacuum pump and start pump down.

6. Slowly loosen the flare nut of the 3-way valve and check if air
enters, then retighten the flare nut.
(When the flare nut is loosened the operating sound of the
vacuum pump changes and the reading of the compound
pressure gauge goes from minus to zero.)

OUTDOOR UNIT

OUTDOOR UNIT INSTALLATION

AIR PURGE

Always use a vacuum pump to purge the air.
Refrigerant for purging the air is not charged in the
outdoor unit at the factory.

Close the high pressure side valve of the gauge manifold fully and do
not operate it during the following work.

● Set the unit on a strong stand, such as one made of concrete blocks

to minimize shock and vibration.

● Do not set the unit directly on the ground because it will cause trouble.

Connector cover removal

● Remove the two mounting screws.

Installing the connector cover

(1) After inserting the three front hooks, then insert the rear hook.
(2) Tighten the two mounting screws.

Fig. 9

7. Pump down the system for at least 15 minutes, then check if the
compound pressure gauge reads -0.1 MPa (-76 cmHg, -1 bar).

8. At the end of pump down, close the low pressure side gauge of
the gauge manifold fully and stop the vacuum pump.

9. Slowly loosen the valve stem of the 3-way valve. When the
compound pressure gauge reading reaches 0.1-0.2 MPa,
retighten the valve stem and disconnect the charge hose
from the 3-way valve charging port.
(If the stem of the 3-way valve is opened fully before the
charge hose is disconnected, it may be difficult to disconnect
the charge hose.)

2. INSTALLING THE WALL HOOK BRACKET

INDOOR UNIT

1.

CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

3. FORMING THE DRAIN HOSE AND PIPE

Drain hose

Outdoor unit bottom

GENERAL

This INSTALLATION MANUAL briefly outlines where
and how to install the air conditioning system. Please
read over the entire set of instructions for the indoor
and outdoor units and make sure all accessory parts
listed are with the system before beginning.

1.

TYPE OF COPPER PIPE AND INSULATION MATERIAL

Copper tubing for connectin the outdoor unit to the indoor
unit and insulation material is available for purchase locally.
When you purchase them, please specify the following.

A.

Deoxidized annealed copper pipe for refrigerant piping as:

Table 3

STANDARD ACCESSORIES

The following installation accessories are supplied. Use them as
required.

INDOOR UNIT ACCESSORIES

Connection pipe assembly

Connection cord (3-conductor)

Wall pipe

Decorative tape

Vinyl tape

Wall cap

Saddle

Drain hose

Tapping screws

Sealant

Name

Q’ty

1

1

1

1

1

1

1 set

1

1 set

1

ELECTRICAL REQUIREMENT

Always make the air conditioner power supply a special branch cir­cuit and provide a special switch and receptacle. Do not extend the
power cord.

The following items are necessary to install this air conditioner. (The
items are not included with the air conditioner and must be purchased
separately.)

CAUTION

MINIMUM CIRCUIT AMPACITY 16 A

MAXIMUM OVERCURRENT PROTECTION

20 A

(TIME DELAY FUSE OR HACR TYPE CIRCUIT BREAKER)

ELECTRICAL WIRING (OUTDOOR UNIT)

1. Remove the screws, then remove the control box cover.

2. Fasten the Inter unit wire harness and power supply to the conduit holder using the lock nut.

3. Connect inter-unit wire harness and power supply to the terminal.
Refer to the wiring diagram

4. Use the screws to install the control box cover.

WARNING

Be sure to comply with local codes while run­ning the wire from the indoor unit to the out­door unit (size of wire and wiring method, etc. ).

Every wire must be connected firmly.

No wire should be allowed to touch refrigerant
tubing, the compressor or any moving part.

Loose wiring may cause the terminal to over­heat or result in unit malfunction. A fire hazard
may also exist. Therefore, be sure all wiring is
tightly connected.

Connect wires to the matching numbers of
terminals.

NOTE:

• Connector trade size for this unit is 1/2” (12.7 mm). The connec-

tor can be bought at a hardware store. Refer to “How to connect
wiring to the terminals” for instructions on connecting depend­ing on the wire type you are using.

• The fuse located in the outdoor unit provides power supply pro­tection and may blow when power is applied if the system has
been incorrectly wired.

G

G

1

1

G

G

3

3

2

2

1

1

2

2

3

3

208/230V

208/230V

208/230V

208/230V

208/230V

208/230V

5

5

(L)

(L)

(N)

(N)

4

4

Indoor unit

Terminal

Grounding line

Control line

(Inter Unit)
Power line

DISCONNECT
SWITCH
(FIELD SUPPLY)

Outdoor unit

Terminal

POWER SUPPLY

1 phase, 208/230V

Earth screw

Indoor unit
terminal block

Outdoor unit
terminal block

Disconnect switch

Earth screw

Power supply line

Lock nut

Cord Clamp

Conduit
connector

Power supply
Inter-unit
wire harness

ADDITIONAL CHARGE

Refrigerant suitable for a piping length of 49 ft (15 m) is charged in
the outdoor unit at the factory.
When the piping is longer than 49 ft (15 m), additional charging is necessary.
For the additional amount, see the table below.

Between 49 ft (15 m) and 66 ft (20 m), when using a connection pipe
other than that in the table, charge additional refrigerant with 0.2 oz/
ft (20g/1 m) as the criteria.

2. ADDITIONAL MATERIALS REQUIRED FOR INSTALLATION

A. Refrigeration (armored) tape
B. Insulated staples or clamps for connecting wire

(See your local electrical codes.)
C. Putty
D. Refrigeration lubricant
E. Clamps or saddles to secure refrigerant piping

3. OPERATING RANGE

Table 4

[Reverse cycle only]

Fig. 11

When Transporting

Be careful when picking up and moving the indoor and outdoor units.
Get a partner to help, and bend your knees when lifting to reduce strain
on your back. Sharp edges or thin aluminum fins on the air conditioner
can cut your fingers.

When Installing...

...In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It
may be necessary to construct a strong wood or metal frame to provide
added support.

...In a Room

Properly insulate any tubing run inside a room to prevent “sweating”
that can cause dripping and water damage to walls and floors.

...In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level
foundation for the outdoor unit. This prevents water damage and abnor­mal vibration.

...In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle.

...In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting
snow. Provide snow vents.

When Connecting Refrigerant Tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the flare and

union tubes before connecting them, then tighten the nut with a torque
wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

NOTE:

Depending on the system type, liquid and gas lines may be either nar­row or wide. Therefore, to avoid confusion the refrigerant tubing for your
particular model is specified as either “small” or “large” rather than as
“liquid” or “gas”.

When Servicing

• Turn the power OFF at the main circuit breaker panel before opening
the unit to check or repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal

scraps or bits of wiring have been left inside the unit being serviced.

• After installation, explain correct operation to the customer, using the
operating manual.

2”(5 cm)
or over

Mounting Support
(Prepared On-site)

Name and Shape

Q’ty

Air cleaning filter

Air cleaning filter frame

Seal A

Drain pipe

Tapping screw (big)

Tapping screw (small)

Cloth tapeWall hook bracket

Remote
control unit

Battery (penlight)

Remote control
unit holder

1

Q’ty

1

2

1

1

1

8

2

2

2

1

Wall hook
bracket

Counter weight

Wall hook bracket

Tapping screw

Center notch

String

Hook

CAUTION

Install the wall hook bracket horizontally and perpen­dicularly.

WARNING

If the wall pipe is not used, the cord interconnecting
the indoor and outdoor units may touch metal and
cause electric leakage.

Fasten with
vinyl tape

(Wall cap)

(Wall pipe)

(Inside)

Wall

(Outside)

Lower

3-2/16’’(80 mm)
dia. hole

Center mark

3/8’’(10 mm)
or over

3/16’’ to 3/8’’
(5 to 10 mm)
low

3/8’’(10 mm)
or over

Lower

3-2/16’’(80 mm) dia. hole
(A 2-9/16’’(65mm)
diameter hole is
possible for the right­hand side.)

[Rear piping, Right piping, Bottom piping]

● Install the indoor unit piping in the direction of the wall hole and

bind the drain hose and pipe together with vinyl tape. (Fig. 3)

● Install the piping so that the drain hose is at the bottom.

● Wrap the pipes of the indoor unit that are visible from the outside

with decorative tape.

[For Left rear piping, Left piping]

Interchange the drain cap and the drain hose.

Fig. 3

Drain cap

Indoor unit
drain hose

Remove the drain cap by pulling
at the projection at the end of
the cap with pliers, etc.

For left outlet piping, cut off the
piping outlet cutting groove
with a hacksaw.

Right piping

Bind with vinyl tape

Indoor unit drain hose
(bottom)

Pipe (top)
Rear piping

Bottom
piping

Removal method of drain
hose

● Remove the screw at the left of
drain hose and pull out drain
hose.

Installation method of
drain hose

● Vertically insert the drain hose
toward the inside, so that the
drain fixture (blue) can accu­rately align with the screw hole
around the drain cock.
After inserting and before re­placing, please reinstall and fix
the removed screws.

●

Be sure to install around the drain hose connector.

●

As the screw is inside, be sure to use screwdriver treated with magnet.

Screw

Drain hose

Drain fixture
(blue)

Screw hole

Drain hose

Screw

Drain cock

Drain fixture (blue)

CAUTION

(1) In order to align the drain hose and drain cap, be

sure to insert securely and vertically. Incline in­sertion will cause water leakage.

(2)

When inserting, be sure not to attach any mate-

rial besides water. If any other material is attached,
it will cause deterioration and water leakage.

(3) After removing drain hose, be sure not to forget

mounting drain cap.

(4)

Be sure to fix the drain hose with tape to the bot-

tom of piping.

(5)

Prevent drain water frozen under low tempera-

ture environment.

When installing indoor unit's drain hose outdoors,
necessary measure for frost protection should be
taken to prevent drain water frozen.

●

Under low temperature environment (when out-

door temperature under 32 °F), after cooling op­eration is executed, water in the drain hose could
be frozen.
Once drain water is frozen, the drain hose will
be blocked and water leakage may be resulted
for indoor unit.

CAUTION

(1) Fasten a flare nut with a torque wrench as instructed in this manual. If

fastened too tight, the flare nut may be broken after a long period of time
and cause a leakage of refrigerant.

(2) During installation, make sure that the refrigerant pipe is attached firmly

before you run the compressor. Do not operate the compressor under the
condition of refrigerant piping not attached properly with 2-way or 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.

WARNING

(1) Install the unit where it will not be tilted by more

than 5°.

(2) When installing the outdoor unit where it may ex-

posed to strong wind, fasten it securely.

Tapping screw

Rear hooks

Connector cover

Front hooks

Table 6

Tightening torque

Blank cap (2-way valve) 14.47 to 18.08 ft•lbs (200 to 250 kgf•cm)

Blank cap (3-way valve) 20.25 to 23.15 ft•lbs (280 to 320 kgf•cm)

Charging port cap 9.04 to 11.57 ft•lbs (125 to 160 kgf•cm)

10. Fully open the valve stems of the 2-way valve and 3-way valve
using a hexagon wrench. (After the valve stem begins to turn,
turn it with a torque of less than 2.17ft •lbs (30 kgf•cm) until it
stops turning.)

11. Firmly tighten the 2-way valve and 3-way valve blank cap and
the charging port cap.

LO

HI

Fig. 10

Flare nut

3-way valve

-0.1 MPa
(-76 cmHg

-1 bar)
High
pressure
side valve
(closed)

2-way valve

Gauge manifold

Compound pressure gauge

Pressure gauge

Low pressure
side valve

Blank cap

Charge
hose

Vacuum pump

Valve stem

Charge hose

Charging port cap

Charging port

Name and Shape

Fig. 8

21-1/4” (54 cm)

12-9/16” (32 cm)

NOTE:

In places where the outdoor temperature drops
to 32°F or lower, the drain water may freeze and
may stop up the drain or cause other outdoor
unit trouble. Therefore take measures so that
the drain water will not freeze and clog the
drain.

(Rear)

1 Rear outlet

2 Right outlet

3 Bottom outlet

4 Left rear

outlet

5 Left
outlet

Special tools for R410A

Contents of change

Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous
mixing of other refrigerants, the diameter of each port has been changed.

It is recommended the gauge with seals-0.1 to 5.3 MPa (-1 to 53 bar) for high pressure.

-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.

To increase pressure resistance, the hose material and base size were changed.

A conventional vacuum pump can be used by installing a vacuum pump adapter.

Special gas leakage detector for HFC refrigerant R410A.

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

Copper pipes

It is necessary to use seamless copper pipes and it is desirable
that the amount of residual oil is less than 40 mg/10m. Do not
use copper pipes having a collapsed, deformed or discolored
portion (especially on the interior surface). Otherwise, the ex­pansion value or capillary tube may become blocked with con­taminants.
As an air conditioner using R410A incurs pressure higher than
when using R22, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown in Table1.Never use copper pipes thinner than 0.8mm even
when it is available on the market.

Table 1 Thicknesses of Annealed Copper Pipes

Thickness (mm)

Nominal
diameter

1/4

1/2

Outer diameter

(mm)

6.35

12.7

R410A

0.80

0.80

[ref.] R22

0.80

0.80

(1) Do not use the existing (for R22) piping and flare nuts.

• If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury,
etc.(Use the special R410A materials.)

(2) When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant(R410A)

to enter the refrigerant cycle.

• If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value
and cause breakage, injury, etc.

WARNING

CAUTION

When installing pipes shorter than 3m, sound of the outdoor unit will be transferred to the indoor unit, which will
cause large operating sound or some abnormal sound.

Pipe length

Additional

refrigerant

49 ft (15 m)

None

Table 5

66 ft (20 m)

3.5 oz (100 g)

CAUTION

(1) When adding refrigerant, add the refrigerant from

the charging port at the completion of work.

(2) The maximum length of the piping is 66 ft (20 m).

If the units are further apart than this, correct
operation can not be guaranteed.

Heating Mode

About 5 to 75 °F

88 °F or less

Outdoor temperature

Indoor temperature

Indoor humidity

Cooling/Dry Mode

About 14 to 115 °F

About 64 to 90 °F

About 80% or less

Cut each pipe to the appropriate length +12” (30 cm)
to16” (40 cm) to dampen vibration between units.

B. Foamed polyethylene insulation for copper pipes as

required to precise length of piping. Wall thickness
of the insulation should not be less than 5/16” (8 mm).

C. Use insulated copper wire for field wiring.

CAUTION
Check local electrical codes and regulations
before obtaining wire. Also, check any specified
instructions or limitations.

CAUTION

(1) Refrigerant must not be discharged into atmos-

phere.

(2) After connecting the piping , check the joints for

gas leakage with gas leak detector.

Small pipe Large pipe
Outer diameter Thickness Outer diameter Thickness
1/4”(6.35 mm) 1/32”(0.8 mm) 1/2”(12.7 mm) 1/32”(0.8 mm)

Wave

FINISHING

(1) Insulate between pipes.

● For rear, right, and bottom piping, overlap the connection pipe

heat insulation and indoor unit pipe heat insulation and bind
them with vinyl tape so that there is no gap.

● For left and left rear piping, butt the connection pipe heat insula-

tion and indoor unit pipe heat insulation together and bind them
with and vinyl tape so that there is no gap.

● For left and left rear piping, wrap the area which accommodates

the rear piping housing section with cloth tape.

● For left and left rear piping, bind the connection cord to the top

of the pipe with vinyl tape.

● For left and left rear piping, bundle the piping and drain hose

together by wrapping them with cloth tape over the range within
which they fit into the rear piping housing section.

(2) Temporarily fasten the connection cord along the connection pipe

with vinyl tape. (Wrap to about 1/3 the width of the tape from the

bottom of the pipe so that water does not enter.)
(3) Fasten the connection pipe to the outside wall with a saddle, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with

sealer so that rain water and wind cannot blow in.
(5) Fasten the drain hose to the outside wall, etc.

Fig. 16

Pipe

(Saddle)

(Outside wall cap)

(Sealer putty)

(Outdoors)

Fig. 15

Drain hose

GOOD

BAD

BAD BAD

Lifted up

Saddle

End in water

Wall

FRONT PANEL REMOVAL AND INSTALLATION

Check the following:

View from indoors

CUSTOMER GUIDANCE

WARNING

(1) The rated voltage of this product is 208/230 V AC

60 Hz.

(2) Before turning on the power, check if the voltage

is within the 208 V-10% to 230V+10% range.

(3) Always use a special branch circuit and install a

special receptacle to supply power to the room
air conditioner.

(4) Use a circuit breaker and receptacle matched to

the capacity of the air conditioner.
(5) Do not extend the power cord.
(6) Perform wiring work in accordance with stand-

ards so that the air conditioner can be operated

safely and positively.
(7) Install a leakage circuit breaker in accordance with

the related laws and regulations and electric com-

pany standards.

CAUTION

(1) The power source capacity must be the sum of

the air conditioner current and the current of other
electrical appliances. When the current contracted
capacity is insufficient, change the contracted ca­pacity.

(2) When the voltage is low and the air conditioner is

difficult to start, contact the power company the
voltage raised.

Explain the following to the customer in accordance with the operat­ing manual:
(1) Starting and stopping method, operation switching, temperature

adjustment, timer, air flow switching, and other remote control unit

operations.
(2) Air filter removal and cleaning, and how to use the air louvers.
(3) Give the operating and installation manuals to the customer.

POWER

(1) Match the terminal block numbers and connection

cord colors with those of the outdoor unit.
Erroneous wiring may cause burning of the elec­tric parts.

(2) Connect the connection cords firmly to the terminal

block. Imperfect installation may cause a fire.

CAUTION

(3) Always fasten the outside covering of the connection

cord with the cord clamp. (If the insulator is chafed,

electric leakage may occur.)
(4) Securely earth the power cord plug.
(5) Do not use the earth screw for an external connector.

Only use for interconnection between two units.

ELECTRICAL WIRING (INDOOR UNIT)

HOW TO THE INSTALL THE INTER-UNIT WIRE HARNESS

1. Remove the screws, then remove the conduit holder.

2. Fasten the inter-unit wire harness to the conduit holder using the lock nut.
IMPORTANT: Refer to Fig. 19 about the length of inter-unit wire harness.

3. Use the screws to install the conduit holder with which Inter-unit wire har­ness is included.

4. Remove the screws, then remove the cord clamp.

5. Connect inter-unit wire harness to the terminal.
Refer to the wiring diagram.

6. Use the screws to install the cord clamp.

Connection cord

Screw

Connection cord

Screw

Cord clamp

A. For solid core wiring (or F-cable)

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 15/16" (25 mm) to expose the solid wire.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using pliers, bend the solid wire to form a loop suitable for the termi-

nal screw.

(4) Shape the loop wire properly, place it on the terminal board and

tighten securely with the terminal screw using a screwdriver.

B. For strand wiring

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 3/8" (10 mm) to expose the strand wiring.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using a round terminal fastener or pliers, securely clamp a round

terminal to each stripped wire end.

(4) Position the round terminal wire, and replace and tighten the termi-

nal screw using a screwdriver.

A. Solid wire

Strip 15/16" (25 mm)

Insulation

Loop

B. Strand wire

Strip 3/8" (10 mm)

Round
terminal

Wire

Screw with
special washer

Round
terminal

Terminal
board

Terminal block

Wire

Screw with
special washer

Round
terminal

HOW TO CONNECT WIRING TO THE TERMINALS

TEST RUNNING

The method of adjusting inter-unit wire harness

To connect inter-unit wire harness to the terminal correctly, please
refer to Fig. 19 to adjust the length of the part of Inter-unit Wire
harness ahead from conduit holder.

WIRED REMOTE CONTROL UNIT (OPTIONAL)

BEFORE INSTALL WIRED REMOTE CONTROL UNIT

• The wired remote control unit is an option. It isn't included in main body of air-conditioner.

• When you use wired remote control unit, some functions may not be used.

• please use the recommended wired remote control unit.

(Before installing, Please read the FEATURES AND FUNCTIONS section of OPERATING MANUAL to confirm the
concerned contents.)

CAUTION

(1) Before installing, be sure to disconnect all power supply.
(2) Don't touch the heat exchanger.
(3) During installing or removing operation, be sure not to have wire catched by parts or draw it hard. Or it

may result troubles to the air-conditioner.
(4) Avoid place in direct sunlight.
(5) Select place that will not be affected by the heat from a stove, etc.
(6) Insure the length of wire is not over the recommended maxuim length.
(7) Before setting up the wired remote control unit, please confirm whether air-conditioner can receive the

signal.

1. FRONT PANEL AND CONTROL UNIT REMOVAL

(1) Refer to " FRONT PANEL REMOBAL AND INSTALLATION " to remove the front panel.
(2) Remove screws of the heat exchanger, ang then remove grounding wire.
(3) Remove 2 thermistor.
(4) Remove screw, then remove the connector cover and connector.
(5) Remove screw, then remove the control unit.

CIRCUIT BOARD

SCREW

CONNECTOR

TO RENOTE
CONNTROL UNIT

CUT

2. Connecting to control unit of wire

(1) Connect the wire of wired remote control unit to the board of Control unit.
(2) Use wire clamper and screws to fasten wire.
(3) Cut off part of the control unit and thread wire through.

3. FRONT PANEL AND CONTROL UNIT INSTALLATION

Install Front panel and Control unit by the reverse procedures as stated in "1. FRONT PANEL AND CONTROL UNIT REMOVAL".

Fig. 14

5-1/2" (140mm) 15/16" (25mm)

15/16" (25mm)

4-3/16" (105mm)

(1:1)

14AWG

EARTH WIRE

CONDUIT PLATE

CONDUIT CONNECTOR

Fig. 19

Fig. 13

Fig. 12

Lock nut

Conduit Holder

Conduit Connector

Screw

CLAMPER

THE INTAKE GRILLE REMOVAL

(1) Open the intake grille.
(2) Pull down the knob.
(3) Lift the intake grille upward, until the axle at the top of the intake

grille is removed.

THE INTAKE GRILLE INSTALLATION

(1) The fixing axle of the intake grille is installed on the Panel.
(2) Lay down the intake grille.

THE FRONT PANEL REMOVAL

(1) Remove intake grille (Reference the intake grille removal.)
(2) Remove four screws.
(3) The thumb is hung on the lower part as shown in the figure, and it

pulls to the front, pushing [-] mark , and bottom hooks (two posi­tion) is removed from wall hook bracket.

(4) The front panel bottom is pulled to the front, and bottom hooks is

removed indoor unit.

(5) The front panel is pulled to the front, raising the upper surface,

and a front panel is removed.

THE FRONT PANEL INSTALLATION

(1) Firstly, fit the lower part of the front panel, and insert top and bot-

tom hooks. (Three top sides, six bottom sides)
(2) Four screws is attached.
(3) The intake grille is attached.

Bottom hole

(six position)

Front panel

Indoor unit

Bottom hooks

(six position)

Fig. 17

Front panel

Bearing

Mounting shaft

Intake grille

Intake grille

Knob

Top holes (two sides)

Top hole (center)

Top hook (center)

Front panel

Top hooks

(two sides)

Indoor unit

Wall hook bracket

Front panel

Push

[-] mark

Push

Front panel

Screws

(4 position)

Indoor unit pipe (heat insulation)

Connection pipe
(heat insulation)

Vinyl tape

Seal A

Butt connection pipe (heat
insulation) against the indoor
unit pipe (heat insulation)
and wrap with seal A so that
there is no gap.

Pipe

Drain hose

Cloth tape

Wrap with
cloth tape

Left piping

Connection cord

Pipe

Drain hose

For connection from the left rear

Connection cord

Drain hose

Wall pipe

Connection pipe

● Perform test operation and check items 1 and 2 below.

● For the test operation method, refer to the operating manual.

● The outdoor unit, may not operate, depending on the room temperature. In this case, press the test run button on the remote control unit

while the air conditioner is running, (Point the transmitter section of the remote control unit toward the air conditioner and press the test run
button with the tip of a ball-point pen, etc.)

● To end test operation, press the remote control unit START/STOP button.
(When the air conditioner is run by pressing the test run button, the OPERATION indicator lamp and TIMER indicator lamp will simultaneously
flash slowly.)

1. INDOOR UNIT

(1) Is operation of each button on the remote control unit normal?
(2) Does each lamp light normally?
(3) Do the air flow-direction louver operate normally?
(4) Is the drain normal?

2. OUTDOOR UNIT

(1) Is there any abnormal noise and vibration during operation?
(2) Will noise, wind, or drain water from the unit disturb the neighbors?
(3) Is there any gas leakage?

Fig. 18

Transmitter section

Test run button

REMOTE CONTROL UNIT INSTALLATION

CAUTION

(1) Check that the indoor unit correctly receives the

signal from the remote control unit, then install
the remote control unit holder.

(2) Select the remote control unit holder selection

site by paying careful attention to the following:
Avoid places in direct sunlight.
Select a place that will not be affected by the heat
from a stove, etc.

1. REMOTE CONTROL UNIT HOLDER INSTALLATION

• Install the remote control unit with a distance of 23 ft(7

m) between the remote control unit and the photocell
as the criteria. However, when installing the remote con­trol unit, check that it operates positively.

• Install the remote control unit holder to a wall, pillar,

etc. with the tapping screw (Fig.20).

Remote control unit
holder fixing

Remote control
unit holder

Tapping
screw
(small)

Remote control
unit mounting

Remote
control unit

2 Push

1 Set

Fig. 20

PUMP DOWN OPERATION (FORCED COOLING OPERATION)

To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal, recover refrigerant by doing the cooling operation or
forced cooling operation according to the following procedure. (When the cooling operation cannot start in winter, and so on, start the forced
cooling operation.)

(1) Do the air purging of the charge hose by connecting the charging hose of gauge manifold to the charging port of 3 way valve and opening the

low-pressure valve slightly.

(2) Close the valve stem of 2 way valve completely.
(3) Start the cooling operation or following forced cooling operation.

When using the remote control unit
Press the TEST RUN button after starting the cooling operation by the remote control unit.
The operation indicator lamp and timer indicator lamp will begin to flash simultaneously during test run.
When using the MANUAL AUTO button of the indoor unit (The remote control unit is lost, and so on.)
Keep on pressing the MANUAL AUTO button of the indoor unit for more than 10 seconds.
(The forced cooling operation cannot start if the MANUAL AUTO button is not kept on pressing for more than 10 seconds.)

(4) Close the valve stem of 3 way valve when the reading on the compound pressure gage becomes 0.05~0 MPa (0.5~0 kg/cm

2

).

(5) Stop the operation.

• Press the START/STOP button of the remote control unit to stop the operation.

• Press the MANUAL AUTO button when stopping the operation from indoor unit side.

(It is not necessary to press on keeping for more than 10 seconds.)

CAUTION

During the pump-down operation, make sure that the compressor is turned off before you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2 way or 3 way valve open. This may cause abnormal
pressure in the refrigeration cycle that leads to breakage and even injury.

THERMISTOR HOLDER

CONNECTOR

CONNECTOR COVER

SCREW

EARTH WIRE

SCREW

THERMISTOR

CONTROL UNIT

SCREW

SCREW

Cord clamp

1116, Suenaga, Takatsu-ku, Kawasaki 213-8502, Japan

GS01012006

JAN 2006 Printed in Japan