Fujitsu AS*9LSACW, AS*12LSACW, AS*14LSBCW, AS*18LSBCW, AO*9LSAC Service Instructions Manual

SPLIT TYPE
ROOM AIR CONDITIONER

WALL MOUNTED

type

Models Indoor unit Outdoor unit

AS*9LSACW
AS*12LSACW

AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

AO*9LSAC
AO*12LSAC

AO*9LFBC
AO*12LFBC
AOY14LFBC
AO*18LFBC

INVERTER

SERVICE

INSTRUCTION

R410A

CONTENTS

1. SPECIFICATION

AS*14/ 18LSBC, AO*14 / 18LFBC..................................................................................01-03

AS*9 / 12LSAC, AO*9 / 12LSAC.....................................................................................02-01

2. DIMENSIONS

AS*9 / 12LSBC, AO*9 / 12LFBC.....................................................................................01-02

AS*9 / 12LSAC, AO*9 / 12LSAC.....................................................................................01-01

AS*14 / 18LSBC, AO*14 / 18LFBC.................................................................................02-03

AS*9 / 12LSBC, AO*9 / 12LFBC.....................................................................................02-02

3. REFRIGERANT SYSTEM DIAGRAM

AS*9 / 12LSAC, AO*9 / 12LSAC.....................................................................................03-01

AS*14 / 18LSBC, AO*14 / 18LFBC.................................................................................03-03

AS*9 / 12LSBC, AO*9 / 12LFBC.....................................................................................03-02

4. CIRCUIT DIAGRAM

AS*9 / 12LSAC, AO*9 / 12LSAC.....................................................................................04-01

AS*14 / 18LSBC, AO*14 / 18LFBC.................................................................................04-03

AS*9 / 12LSBC, AO*9 / 12LFBC.....................................................................................04-02

5. DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION..............................................................................................05-01

3. DRY OPERATION......................................................................................................05-03

2. HEATING OPERATION..............................................................................................05-02

5. INDOOR FAN CONTROL...........................................................................................05-05

4. AUTO CHANGEOVER OPERATION.........................................................................05-04

7. LOUVER CONTROL...................................................................................................05-08

6. OUTDOOR FAN CONTROL.......................................................................................05-07

9. TIMER OPERATION CONTROL................................................................................05-10

8. COMPRESSOR CONTROL........................................................................................05-09

11. TEST OPERATION CONTROL..................................................................................05-12

10. ELECTRONIC EXPANSION VALVE CONTROL........................................................05-12

13. FOUR-WAY VALVE EXTENSION SELECT...............................................................05-12

12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST ).................................05-12

15. MANUAL AUTO OPERATION ( Indoor unit body operation ).....................................05-13

14. AUTO RESTART.........................................................................................................05-12

17. COIL DRY OPEARTION CONTROL..........................................................................05-13

16. COMPRESSOR PREHEATING..................................................................................05-13

6. REFRIGERANT CAUTION -R410A-

18. DEFROST OPERATION CONTROL..........................................................................05-14

20. VARIOUS PROTECTIONS.........................................................................................05-17

19. OFF DEFROST OPERATION CONTROL..................................................................05-16

1. R410A TOOLS............................................................................................................06-01

3. PRECAUTION FOR SERVICING...............................................................................06-04

2. PRECAUTION FOR INSTALLATION.........................................................................06-02

5. DEFFERENCE FROM CONVENTIONAL MODEL(R22) AND PRECAUTIONS........06-08

4. NEW REFRIGERANT R410A.....................................................................................06-05

7. TROUBLE SHOOTING

1. WHEN THE UNIT DOES NOT OPERATE AT ALL....................................................07-01

3. TROUBLE SHOOTING METHOD

2. SELF DIAGNOSIS FUNCTION..................................................................................07-02

8. APPENDING DATA

1. JUMPER SETTING OF INDOOR UNIT AND OUTDOOR UNIT................................08-01

3. THERMISTOR RESISTANCE VALUES.....................................................................08-08

2. OUTDOOR UNIT PRESSURE VALUE AND TOTAL ELECTRIC

CURRENT CURVE...................................................................................................08-02

9. INSTALLATION MANUAL

4. SELF-DIAGNOSIS FUNCTION AND CHECKING POINTS.......................................07-03

5. SERIAL SIGNAL DIAGNOSIS....................................................................................07-08

6. IPM PROTECTION.....................................................................................................07-09

7. ACTIVE FILTER FAILURE.........................................................................................07-10

8. TROUBLE SHOOTING OF REFRIGERANT CYCLE.................................................07-11

1 . SPECIFICATIONS

R410A

WALL MOUNTED type

INVERTER

SPECIFICATIONS

TYPE

(COOL&HEAT INVERTER) (COOL&HEAT INVERTER)

INDOOR UNIT

AS*9LSACW AS*12LSACW

OUTDOOR UNIT AO*9LSAC AO*12LSAC

COOLING CAPACITY( ) : Range

(kW)

2.6 (0.5~3.6) 3.5 (0.9~4.2)

HEATING CAPACITY( ) : Range

(kW) 3.6 (0.5~6.0) 4.8 (0.9~6.6)

POWER SOURCE

(V) 230

FREQUENCY

(Hz)

50

RUNNING CURRENT

(A)

COOLING 3.0

3.6

5.8

1.33 (0.25~2.30)0.91 (0.25~1.96)

4.6

HEATING

INPUT WATTS

(kW)

COOLING

0.68 (0.25~1.38) 1.03 (0.25~1.61)

HEATING

EER

(kW/kW)

COOLING 3.82 3.40

3.96 3.61

1.8

HEATING

MOISTURE REMOVAL

1.3

AIR CIRCULATION-Hi

(m3/hr)

C 630 H665

C 630 H700

ELECTRICAL DATA

COMPRESSOR

Note : Always use a vacuum pump to purge the air.

Refrigerant for purging the air is not charged in the outdoor unit at the factory.

DIMENSIONS

TYPE Hermetic type,4 pole, 3 phase , DC brushles motor

DISCRIMINATION 80206680

REFRIGERANT R410A

(g)

(r.p.m.)

(r.p.m.)

950

1100

POWER SOURCE (V) 230

HI-SPEED

MED-SPEED

INDOOR UNIT

LO-SPEED

QUIET

C 1,350 H 1,420

C 1,150 H 1,200

C 950 H 1,000

C 740 H 900

C 1,400 H 1,470

C 1,200 H 1,290

C 1,000 H 1,110

C 820 H 980

OUTDOOR UNIT 830

INDOOR UNIT H x W x D (mm)

H x W x D (mm)

280 x 790 x 230

OUTDOOR UNIT 535 x 780 x 250

FAN MOTOR

(dB)

(dB)

HI-SPEED

MED-SPEED

INDOOR UNIT

LO-SPEED

QUIET

C 42 H 42

OUTDOOR UNIT

NOISE LEVEL

15 m

None

WEIGHTS

INDOOR UNIT

OUTDOOR UNIT

80206680

( /hr)

C 43 H 43

C 37 H 36 C 39 H38

C 31 H 30 C 32 H 33

C 23 H 26 C 26 H 29

C 47 H 49

Note : Noise was measured in accordance with JIS standards, Japan.

GROSS / NET (kg)

GROSS / NET (kg)

12 / 9

35 / 33 37 / 34

MAX PIPE LENGTH

ADDITIONAL REFRIGERANT

THICKNESSES OF ANNEALED COPPER PIPES

Nominal diameter

1/4

3/8

Outer diameter (mm)

6.35

9.52

R410A

0.80

0.80

[ref,] R22

0.80

0.80

Thickness (mm)

01-01

SPECIFICATIONS

INDOOR UNIT

H x W x D (mm)

H x W x D (mm)

275 x 790 x 215

OUTDOOR UNIT

540 x 790 x 290

DIMENSIONS

INDOOR UNIT

GROSS / NET (kg)

GROSS / NET (kg)

12 / 9

OUTDOOR UNIT

42 / 3839 / 35

WEIGHT

TYPE

COOL & HEAT INVERTER

INDOOR UNIT

AS*12LSBCW

OUTDOOR UNIT

AO*12LFBC

AS*9LSBCW

AO*9LFBC

COOLING CAPACITY

(kW) 3.50

HEATING CAPACITY

(kW)

4.80

POWER SOURCE (V) 230

FREQUENCY (Hz)

50

RUNNING CURRENT

COOLING 4.3

(A)

HEATING

5.6

INPUT WATTS

(kW)

COOLING 0.92

HEATING

1.23

E.E.R.

COOLING

3.80

COP HEATING

3.90

MOISTURE REMOVAL

1.8

AIR CIRCULATION-Hi (m /hr)

3

C 635 H 670C 595 H 645

2.60

3.60

3.0

3.8

0.62

0.82

4.19

4.39

1.3

FAN MOTOR

TYPE

Hermetic type, 4 pole, 3 phase,
DC inverter motor, Rotary

DISCRIMINATION DA 89 X 1F - 20F

REFRIGERANT R410A (g) 1,050950

POWER SOURCE (V) 230

HI-SPEED (r.p.m.) C 1,300 H 1,390

INDOOR
UNIT

MED-SPEED (r.p.m.) C 1,120 H 1,200

LO-SPEED (r.p.m.) C 950 H 1,000

QUIET (r.p.m.) C 700 H 760

C 1,370 H 1,440

C 1,150 H 1,200

C 950 H 1,000

C 700 H 760

OUTDOOR UNIT (r.p.m.) C 830 H 830C 840 H 840

ELECTRICAL DATA

COMPRESSOR

( /hr)

INDOOR UNIT

(dB) C 43 H 43

OUTDOOR UNIT

(dB) C 47 H 49

C 42 H 42

C 47 H 48

NOISE LEVEL

REFRIGERANT (R410A)

Pipe Length

15 m 950 g 1,050 g

FULL CHARGE AMOUNT

20 m 1,050 g 1,150 g

ADDITIONAL REFRIGERANT

20 g / m

(kW/kW)

(kW/kW)

THICKNESSES OF ANNEALED COPPER PIPES

Nominal diameter

1/4

3/8

Outer diameter (mm)

6.35

9.52

R410A

0.80

0.80

[ref,] R22

0.80

0.80

Thickness (mm)

01-02

SPECIFICATIONS

INDOOR UNIT

H x W x D (mm)

H x W x D (mm)

275 x 790 x 215

OUTDOOR UNIT

578 x 790 x 300

DIMENSIONS

INDOOR UNIT

GROSS / NET

(kg)

GROSS / NET (kg)

12 / 9

OUTDOOR UNIT

40 / 38

WEIGHT

TYPE

COOL & HEAT INVERTER

INDOOR UNIT

AS*18LSBCW

OUTDOOR UNIT

AO*18LFBC

AS*14LSBCW

AO*14LFBC

COOLING CAPACITY

(kW) 5.20

HEATING CAPACITY

(kW)

6.25

POWER SOURCE (V) 230

FREQUENCY (Hz)

50

RUNNING CURRENT

COOLING 7.6

(A)

HEATING

7.6

INPUT WATTS

(kW)

COOLING 1.72

HEATING

1.73

E.E.R.

COOLING

3.02

COP HEATING

3.61

MOISTURE REMOVAL

2.8

AIR CIRCULATION-Hi (m /hr)

3

C 700 H700C 700 H700

4.20

5.60

4.9

6.4

1.11

1.45

3.78

3.86

2.1

FAN MOTOR

TYPE

Hermetic type, 4 pole, 3 phase,
DC inverter motor, Rotary

DISCRIMINATION DA / 30A / F-25F

REFRIGERANT R410A (g) 1,150

POWER SOURCE (V) 230

HI-SPEED (r.p.m.) C 1,480 H 1,480

INDOOR
UNIT

MED-SPEED (r.p.m.) C 1,260 H 1,300

LO-SPEED (r.p.m.) C 1,040 H 1,110

QUIET (r.p.m.) C 850 H 950

OUTDOOR UNIT (r.p.m.) C 860 H 820C 820 H 750

ELECTRICAL DATA

COMPRESSOR

( /hr)

INDOOR UNIT

(dB) C 45 H 43

OUTDOOR UNIT

(dB) C 49 H 49

C 44 H 43

C 48 H 48

NOISE LEVEL

REFRIGERANT (R410A)

PIPE LENGTH

15 m 1,150 g

FULL CHARGE AMOUNT

20 m 1,250 g

ADDITIONAL REFRIGERANT

20 g / m

(kW/kW)

(kW/kW)

THICKNESSES OF ANNEALED COPPER PIPES

Nominal diameter

1/4

1/2

Outer diameter (mm)

6.35

12.7

R410A

0.80

0.80

[ref,] R22

0.80

0.80

Thickness (mm)

01-03

2 . DIMENSIONS

R410A

WALL MOUNTED type

INVERTER

DIMENSIONS

Models : AS*9LSACW / AO*9LSAC

AS*12LSACW / AO*12LSAC

540 120

272

302

780 55

250

535

10

280

790 230

02-01

DIMENSIONS

AS*12LSBCW / AO*12LFBC

Models : AS*9LSBCW / AO*9LFBC

(unit : mm)

275

2,000

215

790

02-02

DIMENSIONS

AS*18LSBCW / AO*18LFBC

Models : AS*14LSBCW / AO*14LFBC

(unit : mm)

275

2,000

215

790

347

578

48

10

320

508

540

20

300

125

60

790

02-03

3 . REFRIGERANT SYSTEM DIAGRAM

R410A

WALL MOUNTED type

INVERTER

REFRIGERANT SYSTEM DIAGRAM

Models : AS*9LSACW / AO*9LSACW
AS*12LSACW / AO*12LSACW

(2 pass)

(2 pass)

Indoor heat exchanger

Outdoor heat exchanger

Capillary
tube

Pulse motor valve

2way-valve3way-valve

Muffler

Compressor

Accumulator

4way-valve

Strainer Dryer

03-01

REFRIGERANT SYSTEM DIAGRAM

2-Way

valve

Strainer

Strainer

3-Way

valve

Muffler

Muffler

4-Way valve

Expansion valve

Heat exchanger

( INDOOR )

Heat exchanger
( OUTDOOR )

AOY9LFBC

(2Pass)

AOY12LFBC

(4Pass)

Compressor

Cooling
Heating

AS*12LSBCW / AO*12LFBC

Models : AS*9LSBCW / AO*9LFBC

03-02

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

AS*18LSBCW / AO*18LFBC

Models : AS*14LSBCW / AO*14LFBC

03-03

4 . CIRCUIT DIAGRAM

R410A

WALL MOUNTED type

INVERTER

CIRCUIT DIAGRAM

INDOOR UNIT

OUTDOOR UNIT

Models : AS*9LSACW / AO*9LSAC

AS*12LSACW / AO*12LSAC

Controller PCB

Thermistor
(pipe)

Thermistor
(discharge pipe)

Thermistor
(outdoor temp.)

04-01

CIRCUIT DIAGRAM

INDOOR UNIT

OUTDOOR UNIT

AS*12LSBCW / AO*12LFBC

Models : AS*9LSBCW / AO*9LFBC

Fan Motor

Stepping
Motor

Thermistor
(room temp.)

Terminal

Terminal

Fuse 250V20A

Reactor Reactor

Fan Motor

Expansion
Valve

4-Way
Valve Assy

PCB (MAIN)

Power
Relay

Compressor

Thermistor
(pipe temp.)

Test

Thermistor (pipe)

Thermistor (Discharge Pipe)

Thermistor (outdoor temp.)

Display Board

Controller PCB

Power

102 C

Thermal Fuse

1
2
3
4
5
6

1
2
3

1
2
3

1
2
3

1
2
3

1
2
3

4
5

1
2
3
4
5

1
2
3

1
2
3

1
2
3

4

1
2
3
4

1
2
3
4

5

6

1

2

3

4

5

1

2

3

4

5

1

2

1

2

1

2

3

4

5

1

2

3

4

5

6

7

1

2

3

4

5

6

1

2

3

4

5

6

1

2

2

1

2

1

3

4

5

6

7

8

9

10

11

1

2

3

4

5

6

7

8

9

10

11

04-02

CIRCUIT DIAGRAM

INDOOR UNIT

OUTDOOR UNIT

AS*18LSBCW / AO*18LFBC

Models : AS*14LSBCW / AO*14LFBC

DISPLAY BOARD

CONTROL BOARD

04-03

5 . DESCRIPTION OF EACH
CONTROL OPERATION

R410A

WALL MOUNTED type

INVERTER

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 2 C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.

* If the room temperature is 2.5 C lower than a set temperature, the compressor will be
stopped.

* When the room temperature is between +2 C to -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
AS*9LSACW 18Hz 60Hz 80Hz
AS*12LSACW 18Hz 80Hz 96Hz
AS*9LSBCW 18Hz 61Hz 80Hz
AS*12LSBCW 18Hz 80Hz 96Hz
AS*14LSBCW 18Hz 70Hz 90Hz
AS*18LSBCW 18Hz 70Hz 90Hz

Outside air Outside air
temperature temperature

36 C

A zone

34 C

32 C

B zone

30 C

21 C

C zone

19 C

D zone

Hi Me Lo Quiet

A zone 80Hz 51Hz 45Hz 33Hz
B zone 80Hz 51Hz 45Hz 33Hz
C zone 80Hz 51Hz 45Hz 33Hz

9LSACW

D zone 51Hz 39Hz 33Hz 27Hz
A zone 96Hz 60Hz 51Hz 33Hz
B zone 96Hz 60Hz 51Hz 33Hz
C zone 80Hz 60Hz 51Hz 33Hz

12LSACW

D zone 51Hz 42Hz 36Hz 27Hz
A zone 80Hz 61Hz 51Hz 33Hz
B zone 80Hz 61Hz 51Hz 33Hz
C zone 80Hz 61Hz 51Hz 33Hz

9LSBCW

D zone 51Hz 42Hz 36Hz 22Hz
A zone 96Hz 61Hz 51Hz 33Hz
B zone 96Hz 61Hz 51Hz 33Hz
C zone 96Hz 61Hz 51Hz 33Hz

12LSBCW

D zone 51Hz 42Hz 36Hz 22Hz
A zone 90Hz 45Hz 42Hz 30Hz
B zone 90Hz 45Hz 42Hz 30Hz
C zone 90Hz 45Hz 42Hz 30Hz

14LSBCW

D zone 49Hz 38Hz 34Hz 24Hz
A zone 90Hz 45Hz 42Hz 30Hz
B zone 90Hz 45Hz 42Hz 30Hz
C zone 90Hz 45Hz 42Hz 30Hz

18LSBCW

D zone 49Hz 38Hz 34Hz 24Hz

( Table 1 : Compressor Frequency Range )

( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )

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 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

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 3 C than a set temperature, the compressor operation
frequency will attain to maximum performance.

* If the room temperature is higher 2.5 C than a set temperatire, the compressor will be
stopped.

minimum

frequency

maximum

frequency
AS*9LSACW 18Hz 130Hz
AS*12LSACW 18Hz 130Hz
AS*9LSBCW 18Hz 130Hz
AS*12LSBCW 18Hz 130Hz
AS*14LSBCW 18Hz 119Hz
AS*18LSBCW 18Hz 119Hz

Outside air Outside air
temperature temperature

19 C

C zone

17 C

14 C

B zone

12 C

A zone

Hi Me Lo Quiet

A zone 130Hz 92Hz 80Hz 68Hz
B zone 130Hz 80Hz 60Hz 54Hz

9LSACW

C zone 96Hz 68Hz 54Hz 51Hz
A zone 130Hz 96Hz 80Hz 68Hz
B zone 130Hz 96Hz 64Hz 57Hz

12LSACW

C zone 96Hz 96Hz 64Hz 54Hz
A zone 130Hz 96Hz 80Hz 68Hz
B zone 130Hz 96Hz 80Hz 54Hz

9LSBCW

C zone 130Hz 96Hz 80Hz 45Hz
A zone 130Hz 96Hz 80Hz 68Hz
B zone 130Hz 96Hz 80Hz 54Hz

12LSBCW

C zone 130Hz 96Hz 80Hz 45Hz
A zone 119Hz 90Hz 70Hz 58Hz
B zone 119Hz 90Hz 70Hz 58Hz

14LSBCW

C zone 119Hz 90Hz 70Hz 58Hz
A zone 119Hz 90Hz 70Hz 58Hz
B zone 119Hz 90Hz 70Hz 58Hz

18LSBCW

C zone 119Hz 90Hz 70Hz 58Hz

* When the room temperature is between +2 C to -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 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

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
AS*9LSACW 33Hz
AS*12LSACW 33Hz
AS*9LSBCW 33Hz
AS*12LSBCW 33Hz
AS*14LSBCW 24Hz
AS*18LSBCW 24Hz

room room
temperatu re temperature

compressor ON

Ts+1.5 C

Ts+0.5 C

compressor OFF

Compressor

ON

OFF

Indoor fan

Dry air flow

S-Lo

OFF

10 30 60 180 60 180 60 10 30 (sec)

( Table 3 : Compressor frequency )

( Fig.3 : Compressor Control based on Room Temperature )

( Fig.4 : Indoor Fan Control )

05-03

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 18 C and 30 C in 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

32 C

B zone

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+ 2 C

Monitoring

Cooling

(automatic dry)

Cooling

(automatic dry)

TS+2 C TB TS-2 C

Monitoring Monitoring Monitoring

TB TS-2 C Heating Heating 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 -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+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 )

AS*9LSACW

Operation mode Air flow mode Speed (rpm)

Hi 1420

Me+ 1370

Me 1200

Lo 1000

Quiet 900

Cool air

prevention

850

Heating

S-Lo 480

Hi 1350

Me 1150

Lo 950

Cooling
Fan

Quiet 740

Dry 740

AS*9LSBCW

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

AS*14LSBCW

Operation mode Air flow mode Speed (rpm)

Hi 1480

Me+ 1420

Me 1300

Lo 1110

Quiet 950

Cool air

prevention

850

Heatin g

S-Lo 480

Hi 1480

Me 1260

Lo 1040

Cooling
Fan

Quiet 850

Dry 850

(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.

AS*12LSACW

Operation mod e Air flow mode Speed (rpm)

Hi 1470

Me+ 1420

Me 1290

Lo 1110

Quiet 980

Cool air

prevention

850

Heating

S-Lo 480

Hi 1400

Me 1200

Lo 1000

Cooling
Fan

Quiet

820

Dry 820

AS*12LSBCW

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

AS*18LSBCW

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

05-05

(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 mode
[HIGH] [QUIET], the indoor motor +2.5
will run at a constant airflow of [COOL] +2.0
operation modes QUIET, LOW, MED, MED mode
HIGH, as shown in Table 5. +1.5

+1.0

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 -1.0
will run at a constant airflow of [HEAT] -1.5
operation modes QUIET, LOW, MED, MED mode
HIGH, as shown in Table 5. -2.0

-2.5

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

47 Hi

40 Me+ 40

37

Lo 34

Cool air prevention 32

30

28

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

6. OUTDOOR FAN CONTROL

(1). Outdoor Fan Motor

AC Motor

DC Motor
AS*9/12LSACW
AS*9/12LSBCW
AS*14/18LSBCW

(2). Fan Speed

Cooling Dry Heating

AS*9LSACW 830rpm 830rpm 830rpm
AS*12LSACW 820rpm 820rpm 820rpm
AS*9LSBCW 840rpm 840rpm 840rpm
AS*12LSBCW 830rpm 830rpm 830rpm

Cooling Dry Heating

AS*14LSBCW 860/820/670/500rpm 500rpm 820/750/670/550/450rpm
AS*18LSBCW 860/820/670/500rpm 500rpm 820/750/670/550/450rpm

Following table shows the type of the outdoor fan motor. The control method is different
between AC motor and DC motor.

( Table 6 : Type of Motor )

( Table 7 : AC Motor )

In conjunction with the compressor ON/OFF, the fan speed operates at around the speed
shown above.

*

( Table 8 : DC Motor )

*

The outdoor fan speed changed in the range mentioned avobe depending 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 shanges to the
lower speed.)

*

It runs at 500rpm for 20 seconds after starting up the outdoor fan.

*

After the defrost control is operated on the heating mode, the fan speed keeps at 950rpm
without relating to the compressor frequency.

05-07

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 9.

Cooling Heating

Min Max Min Max

Dry

AS*9LSACW 18Hz 80Hz 18Hz 130Hz 33Hz
AS*12LSACW 18Hz 96Hz 18Hz 130Hz 33Hz
AS*9LSBCW 18Hz 80Hz 18Hz 130Hz 33Hz
AS*12LSBCW 18Hz 96Hz 18Hz 130Hz 33Hz
AS*14LSBCW 18Hz 90Hz 18Hz 119Hz 24Hz
AS*18LSBCW 18Hz 90Hz 18Hz 119Hz 24Hz

AS*9LSACW 56Hz 64Hz 74Hz 87Hz 108Hz 120Hz
AS*12LSACW 56Hz 64Hz 74Hz 87Hz 108Hz 120Hz
AS*9LSBCW 56Hz 74Hz 87Hz 97Hz 108Hz 119Hz
AS*12LSBCW 56Hz 74Hz 87Hz 97Hz 108Hz 119Hz
AS*14LSBCW 40Hz 59Hz 72Hz 80Hz 101Hz 110Hz
AS*18LSBCW 40Hz 59Hz 72Hz 80Hz 101Hz 110Hz

AS*9LSACW 80sec 30sec 30sec 30sec 50sec 60sec
AS*12LSACW 80sec 30sec 30sec 30sec 50sec 60sec
AS*9LSBCW 80sec 60sec 60sec 180sec 60sec 60sec
AS*12LSBCW 80sec 60sec 60sec 180sec 60sec 60sec
AS*14LSBCW 60sec 40sec 40sec 60sec 150sec 60sec
AS*18LSBCW 60sec 40sec 40sec 60sec 150sec 60sec

(Table 9 : 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

9. TIMER OPEARTION CONTROL

(1). OPEARTION FREQUENCY RANGE

The table 10 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER
AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

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 : Depending on the difference between the actual room temperature and the set
temperature value, the unit will start operation automatically in order to bring the room
temperature to the desired set temperature value by the timer previously set.

Operation mode

Stop mode

Before the operation start

Set time of timer

At the ON timer when [Heating/Auto time:45 min] [Cooling/dry time:20 min] are reduced, the
indoor fan motor runs with S-Lo for 1 minute, and detects the room temperature. The [Operation
start time] is determined according to the Table 11 as shown below, and the operation is started.

Differential of set temperature and room temperature

Operation Start Time

Heating Cooling Dry

Before 44 minutes 20 C or larger
Before 30 minutes 15 C 20 C
Before 19 minutes 10 C 15 C 10 C or larger 10 C or larger
Before 15 minutes 5 C 10 C 5 C 10 C
Before 10 minutes Less than 10 C Less than 5 C Less than 5 C

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 10 : Timer Setting)

(Table 11)

(2). PROGRAM TIMER

Stop mode

Stop mode

Stop mode

Operation mode

Operation mode

Set time

Set time Set time Set time

05-10

(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 1 degC.
It increases the setting temperature another 1degC after 1 hour.
After that, the setting temperature is not changed and the operation is stopped at the time
of timer setting.

Ts

+1.0

+2.0

Set

60min

In the heating operation mode

When the sleep timer is set, the setting temperature is decreased 1 degC.
It decreases the setting temperature another 1degC every 30 minutes.
Upon lowering 4degC, the setting temperature is not changed and the operation stops at
the time of timer setting.

-4.0

-3.0

-2.0

-1.0

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

15. MANUAL AUTO OPERATION (Indoor unit body operation)

If MANUAL AUTO Button is set, the operation is controlled as shown in Table 12.
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. 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.

AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

AS*9LSACW

900rpm 36Hz

AS*12LSACW

900rpm 36Hz

AS*9LSBCW

900rpm 36Hz

AS*12LSBCW

900rpm 36Hz

AS*14LSBCW

900rpm 24Hz

AS*18LSBCW

900rpm 24Hz

(Table 12)

(No timer setting available)

16. COMPRESSOR PREHEATING

(Table 13 : Preheating Operation / Release Temperature)

Temperature

Temperature

5 C
5 C
5 C
5 C
5 C
5 C

7 C
7 C
7 C
7 C
7 C
7 C

17. COIL DRY OPERATION CONTROL

The coil-dry operation functions by pressing Coil Dry operation 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.)
Following table indicates the indoor unit setting on the coil-dry operation.

(Table 14 : Coil-dry Operating Functions)

Indoor Fan Speed

Compressor
Frequency

Louver
Position

Main Unit
Indocation

Coil-dry indication : ON
Other indication : OFF

05-13

18. 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 15.

(Table 15 : Condition of starting Defrost Operation)

AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

AS*9LSACW

AS*12LSACW

AS*9LSBCW

AS*12LSBCW

AS*14LSBCW

AS*18LSBCW

1 time defrosting
after starting
operation

ST

Defrosting after 2
time upon 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

- 9 C

- 9 C

- 9 C

- 9 C

- 9 C

- 9 C

- 5 C

- 5 C

- 5 C

- 5 C

- 5 C

- 5 C

- 3 C

- 3 C

- 3 C

- 3 C

- 3 C

- 3 C

Less than 35 minutes

35 minutes to
4 hours

Does not operate

Compressor operating time

After 4 hours

- 3 C

- 3 C

- 3 C

- 3 C

- 3 C

- 3 C

- 6 C

- 6 C

- 6 C

- 6 C

- 6 C

- 6 C

(2). CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 16.

(Table 16 : Defrost Release Condition)

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 16degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 16degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 10degC 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 - 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 10 C / 16 C

or
Compressor ON time:
Over 15 minutes

Defrost end

Below - 5 C

Below - 3 C

Below - 6 C

Below - 3 C

05-15

19. 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 - 4 C, and compressor
operation integrating time lasts for more than 30 minutes.

AS*9LSACW

AS*12LSACW

AS*9LSBCW

AS*12LSBCW

AS*14LSBCW

AS*18LSBCW

OFF Defrost Flow Chart

Heating operation stop

Outdoor heat exchanger temperature:

Below - 4 C

and
Compressor integrating operation:
Over 30 minutes

Defrost start

Defrost Indicater:

[Operation lamp]

Outdoor heat exchanger temperature:

Over 10 C / 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 10degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 16degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 16degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.

Outdoor heat exchanger temperature sensor value is higher than 10degC or
Compressor operation time has passed 15 minutes.

7 sec ON / 2 sec OFF

05-16

20. VARIOUS PROTECTIONS

(1). DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

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

AS*9LSACW 104 C 101 C 110 C
AS*12LSACW 104 C 101 C 110 C
AS*9LSBCW 104 C 101 C 110 C
AS*12LSBCW 104 C 101 C 110 C
AS*14LSBCW 104 C 101 C 110 C
AS*18LSBCW 104 C 101 C 110 C

AS*9LSACW AS*12LSACW AS*9LSBC W AS*12LSBCW AS*14LSBCW AS*18LSBCW

OT (Control / Release)

6.5A / 6.0A

17 C

8.0A / 7.5A

12 C

8.0A / 7.5A

8.0A / 7.5A

6.5A / 6.0A

8.0A / 7.5A

8.5A / 8.0A

9.5A / 9.0A

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

7.0A / 6.5A

9.0A / 8.5A

10.5A / 10.0A

12.0A / 11.5A

7.0A / 6.5A

9.0A / 8.5A

10.5A / 10.0A

12.0A / 11.5A

AS*9LSACW AS*12LSACW AS*9LSBCW AS*12LSBCW AS*14LSBCW AS*18LSBCW

3.5A / 3.0A

46 C

4.0A / 3.5A

40 C

5.5A / 5.0A

4.0A / 3.5A

5.0A / 4.5A

6.5A / 6.0A

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

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 17 : 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 18 : Current Release Operation Value / Release Value)

[ Heating ]

[ Cooling / Dry ]

OT : Outdoor Temperature

OT (Control / Release) OT (Control / Release)

OT (Control / Release)

OT (Control / Release)

OT (Control / Release)

OT : Outdoor Temperature

OT (Control / Release) OT (Control / Release)

OT (Control / Release)

OT (Control / Release) OT (Control / Release)

OT (Control / Release)

5 C

17 C

12 C

5 C

17 C

12 C

5 C

17 C

12 C

5 C

17 C

12 C

5 C

17 C

12 C

5 C

46 C

40 C

46 C

40 C

46 C

40 C

46 C

40 C

46 C

40 C

05-17

(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 .

AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

(Table 19 : Anti-freezing Protection Operation / Release Temperature)

TemperatureTemperature

4 C
4 C
4 C
4 C
4 C
4 C

7 C
7 C
7 C
7 C
7 C
7 C

(4). COOLING PRESSURE OVERRISE PROTECTION

(Table 20 : 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.

AS*9LSACW 65 C
AS*12LSACW 65 C
AS*9LSBCW 67 C
AS*12LSBCW 67 C
AS*14LSBCW 65 C
AS*18LSBCW 65 C

Temperature

AS*9LSACW
AS*12LSACW
AS*9LSBCW
AS*12LSBCW
AS*14LSBCW
AS*18LSBCW

Indoor heat exchange
temperature

[ AS*9/12LSBCW ]
52Hz or greater 51Hz
26 51Hz
18 25Hz OFF

AS*9LSACW 52 C 48 C 54 C 50 C
AS*12LSACW 52 C 48 C 54 C 50 C

(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.
(The control system is different depending on the product model)

Control system

(Fig 11 : Heating Overload Protection Control)

[ Control System ]

Temperature

Temperature

Refer to below

The frequency increase every
60 seconds gradually.
It returns to the normal operation
after 5 minutes.

Fan Hi

Other than Hi

Temp

Temp Temp

Temp

Compressor Operation

Frequency down evry 60 seconds

05-18

Indoor heat exchange
temperature

[ AS*9/12LSBCW ]
52Hz or greater 51Hz
26 51Hz
18 25Hz OFF

AS*9LSACW 52 C 48 C 54 C 50 C
AS*12LSACW 52 C 48 C 54 C 50 C

[ Control System ]

Temperature

Temperature

Refer to below

The frequency increase every
60 seconds gradually.
It returns to the normal operation
after 5 minutes.

Fan Hi

Other than Hi

Temp

Temp Temp

Temp

Compressor Operation

Frequency down evry 60 seconds

[ AS*9/12LSBCW ]

[ AS*14/18LSBCW ]

46Hz or greater 45Hz

39Hz or greater 38Hz

39 45Hz

38Hz

26 38Hz 25Hz

19 29Hz 18Hz

18 25Hz OFF

OFF

AS*9LSBCW 55 C 53 C 52 C 50 C
AS*12LSBCW 55 C 53 C 52 C 50 C
AS*14LSBCW 55 C 53 C 52 C 50 C
AS*18LSBCW 55 C 53 C 52 C 50 C

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

Temp

Temp Temp

Temp

05-19

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)

Refrigerant cylinder

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 different 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

2. PRECAUTION FOR INSTALLATION

Precaution for installation

Selection of pipe

Pipe thickness

Outer diameter Thickness

1/4” (6.35mm) 0.8 mm

3/8” (9.52mm) 0.8 mm

1/2”(12.7mm) 0.8 mm

Be sure to use this pipe thickness and over
for countermeasure against higher

pressure.

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.

R22
/R407C

R22
/R407C

06-02

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

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. Trouble shooting method
* Serial signal check
* IPM protection check
* Active filter error 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?
(3) Check if each connector is inserted securely.

[Checking Flow Chart]

Is AC input voltage from AC outlet normal ?

Is AC voltage between VA 1 normal?

Is DC voltage between terminal of C5 normal?

Is DC voltage between terminals of C7 and C12

Is DC voltage between terminal 1 & 2 of IC6 normal?

YES (AC220/230V)

YES (AC220/230V)

YES (AC220/230V)

Is DC voltage between terminals of C9

YES (C7:DC20V)

(C12:DC13.5 1V)

YES (DC12 14V)

Terminal board temperature

fuse is blown or CN1 is loose

(IC2, T1 or IC3 defective)

IC4 defective

YES (DC15V)

Is DC voltage between terminals 3 & 4 of IC7 normal?

YES (Pulse wave of DC5Vp-p)

IC7 defective

(F1, VA1 defective)

Input power supply failure

Controller PCB defective

NO

NO

NO

NO

NO

NO

NO

Switching power circuit

Switching power circuit

Switching power circuit

(F2, D1, R1 defective)

07-01

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, [Large Division 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 Large Div. Error Indication Normal indication after

3min.ST

Indication

AC Plug ON Start operation Input TEST signal

(4) By pressing [TEST] button of remote control while [Large Division Error Indication], it switches

to
[Small Division Error Indication].

(5) Every time [TEST] button of remote control is pressed, it switches between [Large Division Error

Indication] and [Small Division Error Indication] alternately.

How to erase Memory

(1) While [Large Division Error Indication] or [Small Division Error Indication] is ON by the

self-diagnosis function, the memorized contents can be erased by pressing [Forced Auto

Button] on the main unit.
(Indoor unit buzzer beeps 3 seconds.)

07-02

Self - diagnosis function and Checking points

Large Division Error

Indication

Small Division Error

Indication

Operation

Timer

Large Div.

Contents

Opera

tion

Timer

Small Div. Contents

(Protection)

Diagnosis Method

0.1

sec.

blinki

ng

0.5 sec
2 times

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.)

0.1

sec.

blinki

ng

0.5 sec
3 times

Serial reverse transfer
error during the
operation

When the indoor unit does not receive the signal for 10 consecutive seconds during the operation > 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.)

0.1

sec.

blinki

ng

0.5 sec
4 times

Serial forward transfer
error at starting up
operation

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

ON 1 sec.

blinking

Transmission
Error

0.1

sec.

blinki

ng

0.5 sec
5 times

Serial forward transfer
error during the
operation

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.)

07-03

0.1

sec.

blinki

ng

0.5 sec
2 times

Room temperature
thermistor defective

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

[Diagnosis Point]

- Check Thermistor resistance value (Refer to “Thermistor characteristics table”).

- Controller PCB defective.

0.5 sec
2 times

0.1 sec.
blinking

Indoor Unit
Thermistor
Error

0.1

sec.

blinki

ng

0.5 sec
3 times

Indoor Heat Exchanger
Thermistor Error

The detection value of the indoor heat exchanger thermistor is either open or shorted when the power is ON.

> Remote control does not operate.

[Diagnosis Point]

- Check Thermistor resistance value (Refer to “Thermistor characteristics table”).

- Controller PCB defective.

0.1

sec.

blinki

ng

0.5 sec
2 times

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.

0.1

sec.

blinki

ng

0.5 sec
3 times

Outdoor Heat Exchanger
Thermistor Error

The detection value of the outdoor heat exchanger thermistor is open.

> 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

0.5 sec
3 times

0.1 sec.
blinking

Outdoor Unit
Thermistor
Error

0.1

sec.

blinki

ng

0.5 sec
4 times

Outdoor Temperature
Thermistor Error

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.)

[Diagnosis Point]

- Check Thermistor resistance value (Refer to “Thermistor characteristics table”).

- Controller PCB defective.

0.5 sec
4 times

0.1 sec.
blinking

Indoor Unit
Controller
Error

0.1

sec.

blinki

ng

0.5 sec
2 times

Forced Auto Switch
Error

Forced Auto Switch becomes ON for 10 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.

07-04

0.1

sec.

blinki

ng

0.5 sec
3 times

Main Relay Error

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.

0.1

sec.

blinki

ng

0.5 sec
4 times

Power Supply
Frequency Detection
Error

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

[Diagnosis Point]

- Controller PCB defective.

0.1

sec.

blinki

ng

0.5 sec
2 times

IPM Protection

Abnormal current value of IPM is detected > Permanent stop.

[Diagnosis Point]

- Heat radiation is blocked (Inlet/Outlet)

- Check if Outdoor Fan is defective (does not rotate).

- Controller PCB defective (Refer to after mentioned “IPM diagnosis”)

- Refrigeration cycle defective (Refer to after mentioned “Refrigeration cycle diagnosis”).

0.1

sec.

blinki

ng

0.5 sec
3 times

CT Error

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

[Diagnosis Point]

- Check if CT wire is open.

- Controller PCB defective.

0.1

sec.

blinki

ng

0.5 sec
5 times

Compressor Location
Error

The compressor speed does not synchronize 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”).

0.5 sec
5 times

0.1 sec.
blinking

Outdoor Unit
Controller
Error

0.1

sec.

blinki

ng

0.5 sec
6 times

Outdoor Fan Error
(DC Motor)

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.

07-05

0.1

sec.

blinki

ng

0.5 sec

2 times

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 stops. (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.

0.5 sec
6 times

0.1 sec.
blinking

Indoor Fan
Motor Error

0.1

sec.

blinki

ng

0.5 sec

3 times

Indoor Fan Speed Error

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 stops. (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.

0.1

sec.

blinki

ng

0.5 sec

2 times

Discharge Temperature
Error

The discharge temperature error is activated. > Permanent stop.

[Diagnosis Poijnt]

- 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 diagnosis”).

0.5 sec
7 times

0.1 sec.
blinking

Refrigerant
Cycle Error

0.1

sec.

blinki

ng

0.5 sec

3 times

Excessive High Pressure
Protection on Cooling

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 diagnosis”).

0.1

sec.

blinki

ng

0.5 sec

2 times

Active Filter Error
(Permanent Stop)

Output voltage error of Active filter is detected. > Permanent stop.

[Diagnosis Point]

- Check the wiring connection (Connector is loose/open, Choke coil)

- Controller PCB defective (Refer to after mentioned “Active Filter diagnosis”)

0.5 sec
8 times

0.1 sec.
blinking

Other Error

0.1

sec.

blinki

ng

0.5 sec

3 times

Active Filter Error

Active filter error or instantaneous cut off error is detected.
> Compressor, Outdoor Fan : OFF

[Diagnosis Point]

- Check the wiring connection (Connector is loose/open, Choke coil)

- Controller PCB defective (Refer to after mentioned “Active Filter diagnosis”)
<CAUTION> Even if the unit is normal, it may detect error depending on the power supply voltage condition.

07-06

0.1
sec.

blinki

ng

4 times

PFC Circuit Error

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”).

07-07

Serial Signal Diagnosis

[Check Point] Check and find out if the cause is at Indoor unit or Outdoor unit.

* Remove the side cover of Outdoor unit for testing the Outdoor unit connection terminals with a meter.
* Turn on the power and press [TEST] button of Remote control.

[Checking Flow Chart]

[Check Indoor Unit]

CAUTION: Do not touch the terminals or electrical components to avoid electric shock.

Is AC220V/AC230V applied to the terminals N-L on
the Outdoor unit terminal plate?

Connecting cable wiring defect
In correct wiring
Main PCB defective

NO

YES

Measure the voltage between terminals N-3 on the
Outdoor unit terminal plate.
Refer to Fig.1 for Measuring Method.
Judge the result based on Table 1.

L

N

+

Measurement method 1

Diode
(Dielectric voltage : Higher than 600V)

Range DC

(Normal : DC30 60V)

Red

Black

White

+

Range DC

(Normal : DC30 60V)

Red

Black

White

L

N

Fig.1 Selial Signal Measuring Method

Measurement 1 Measurement 2 Indoor unit Outdoor unit

Defective point

voltage value voltage value trouble display operation

0 5V

30 60 V Display No operation Indoor unit control PCB defective

30 60V 0 5V Display No operation Outdoor unit fuse open (input)

Inverter defective

Table 1: Judgement table

L

N

Outdoor unit terminal
plate

Power supply
AC220V/230V

Black

White

Serial
signals

-

-

3

3

3

Red

Measurement method 2

07-08

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.

07-09

Active Filter Failure

[Checking points]

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

[Cause]

(1) Incorrect wiring
(2) Active Filter Module defective
(3) PC Board defective
(4) DC voltage detectiion circuit defective

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

Open the Inverter Controller Assy
and check if there is abnormal points.

Incorrect wiring > Correct and recheck

(Incorrect wiring, Parts touched, Parts broken)

Parts touched > Correct and recheck
Parts broken > Change the broken part

Turn on the power and press TEST button
on Remote Control.
Is the outdoor fan rotating?

Operate the unit for certain time and
measure the terminal voltage of the

The unit is normal.

discharge resistance.
Is the DC voltage between 350 to 425V?

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

Check point (1)

Yes(Normal)

Go to Check point (2)

No(Abnormal)

Check point (2)

Yes(Rotating)

Go to Check point (3)

No(Not rotating)

Check point (3)

Yes(Within range)

No(Out of range)

ACTPM or PCB defective > Replace Main PCB

ACTPM or PCB defective > Replace ACTPM or

Main PCB.
(Replace only ACTPM if Main PCB was replaced
at Check point (2).)

07-10

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

ASY9/12LSACW Compressor Case Temperature at 25degC: 0.512 ohm

ASY9/12LSBCW Compressor Case Temperature at 20degC: 0.701 ohm

ASY14/18LSBCW Compressor Case Temperature at 25degC: 0.730 ohm

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

07-11

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. Thermistor Resistance Values

JP (Jumper) Setting

[Indoor Unit]

AS*9/12LSACW

AS*9/12LSBCW
AS*14/18LSBCW

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

JM1(JP)

D4 (Diode)
Code A (Default)
Code B

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]

AO*9/12LSAC

JP

JM101 JM102 JM103 JM104 JM105 JM106 JM107

Normal Preheat

NO

NO NO

NO

NO

YES

NO

9LSAC

Higher Preheat

NO NO NO

YES

NO NO NO

Normal Preheat

NO

YES

NO NO NO NO NO

12LSAC

Higher Preheat

NO

NO

NO NO NO NO NO

AO*9/12LFBC

JP

JM500
Normal Preheat YES
Higher Preheat NO

AO*14/18LFBC

JP

JM101 JM102 JM103 JM104 JM105 JM106 JM107

Normal Preheat

NO YES

NO NO NO NO NO

14LSBC

Higher Preheat

NO

NO

NO NO NO NO NO

Normal Preheat

NO NO NO NO NO

YES

NO

18LSBC

Higher Preheat

NO

NO NO

YES

NO NO 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

AR-JE (LSAC)

X

X

D3 (Diode)

AR-NJ (LSBC)

X

*

*

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

Model Name : AS*9LSACW, AS*12LSACW

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping

length

7.5m (Height difference 1m)

Power

voltage

50Hz - 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

AS*9LSACW series AS*12LSACW

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

AS*9LSACW series AS*12LSACW

Measure the low pressure with the pressure meter at the service valve. Measure the outdoor

0.7

0.8

0.9

1

1.1

1.2

15 20 25 30 35

In/outdoor ambient temparature (degC)

Low-pressure opf outdoor unit MPaG

RH50%
RH60%
RH70%

3.5

4

4.5

5

15 20 25 30 35

In/outdoor ambient temparature (degC)

Outdoor total electric current A

RH50%
RH60%
RH70%

0.8

0.9

1

1.1

1.2

1.3

1.4

15 20 25 30 35

In/outdoor ambient temparature (degC)

Low-pressure of outdoor unit MPaG

RH 50%
RH 60%
RH 70%

2.00

2.20

2.40

2.60

2.80

15 20 25 30 35

In/outdoor ambient temparature (degC)

Outdoor total electric current A

RH 50%
RH 60%
RH 70%

unit overall current with the current clamp meter at Power Cable.

08-02

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

Model Name : AS*9LSACW, AS*12LSACW

[Condition]
Ambient

temperature

Indoor 15 - 23degC, Outdoor 2 - 12degC

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

50Hz - 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

AS*9LSACW series

AS*12LSACW

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

AS*9LSACW series AS*12LSACW

outdoor unit overall current with the current clamp meter at Power Cable.

2

2.2

2.4

2.6

2.8

3

3.2

3.4

0 5 10 15

outdoor ambient temparature C

High-pressure of outdoor unit MPaG

15 C

20 C(Indoor inlet temp)
23 C

5.00

5.50

6.00

6.50

7.00

7.50

0 5 10 15

outdoor ambient temparature C

Outdoor total electric current A

15 C
20 C(Indoor inlet temp)
23 C

1.8

2

2.2

2.4

2.6

2.8

3

0 5 10 15

outdoor ambient temparature C

High-pressure of outdoor unit MPa

15 C

20 C(Indoor inlet tempe)

23 C

3.00

3.50

4.00

4.50

0 5 10 15

outdoor ambient temparature C

Outdoor total electric current A

15 C
20 C(Indoor inlet temp)
23 C

length

08-03

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

Model Name : AS*9LSBCW, AS*12LSBCW

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

50Hz - 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

AS*9LSBCW series AS*12LSBCW

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

AS*9LSBCW series AS*12LSBCW

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

17.5 20 22.5 25 27.5 30 32.5

In/Outdoor ambient temperature 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

17.5 20 22.5 25 27.5 30 32.5

In/Outdoor ambient temperature 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

17.5 20 22.5 25 27.5 30 32.5

In/Outdoor ambient temperature 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

17.5 20 22.5 25 27.5 30 32.5

In/Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

length

08-04

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

Model Name : AS*9LSBCW, AS*12LSBCW

[Condition]

Ambient

temperature

Indoor 15 - 23degC, Outdoor 2 - 12degC

Refrigerant

amount

Standard amount

Piping

7.5m (Height difference 1m)

Power

voltage

50Hz - 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

AS*9LSBCW series

AS*12LSBCW

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

AS*9LSBCW series

AS*12LSBCW

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

0 2 4 6 8 10 12 14

Outdoor ambient temperature C

Outdoor High Pressure (Mpa)

Indoor inlet temp 15 C

Indoor inlet temp 20 C

Indoor inlet temp 23 C

3.50

3.60

3.70

3.80

3.90

4.00

4.10

4.20

4.30

4.40

0 2 4 6 8 10 12 14

Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Indoor inlet temp 15 C

Indoor inlet temp 20 C

Indoor inlet temp 23 C

2.40

2.50

2.60

2.70

2.80

2.90

3.00

3.10

3.20

3.30

0 2 4 6 8 10 12 14

Outdoor ambient temperature C

Outdoor High Pressure (Mpa)

Indoor inlet temp 15 C

Indoor inlet temp 20 C

Indoor inlet temp 23 C

5.00

5.20

5.40

5.60

5.80

6.00

6.20

6.40

0 2 4 6 8 10 12 14

Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Indoor inlet temp 15 C

Indoor inlet temp 20 C

Indoor inlet temp 23 C

length

08-05

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

Model Name : AS*14LSBCW, AS*18LSBCW

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

50Hz - 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

AS*14LSBC W series

AS*18LSBCW

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

AS*14LSBC W series

AS*18LSBCW

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.

0.8

0.9

1

1.1

1.2

1.3

1.4

15 20 25 30 35

In/Outdoor ambient temperature C

Outdoor Low Pressure (Mpa)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

3

3.5

4

4.5

15 20 25 30 35

In/Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

0.7

0.8

0.9

1

1.1

1.2

1.3

15 20 25 30 35

In/Outdoor ambient temperature C

Outdoor Low Pressure (Mpa)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

4

4.5

5

5.5

6

15 20 25 30 35

In/Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Relative Humidity 50%

Relative Humidity 60%

Relative Humidity 70%

length

08-06

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

Model Name : AS*14LSBCW, AS*18LSBCW

[Condition]
Ambient

temperature

Indoor 15 - 23degC, Outdoor 2 - 12degC

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

50Hz - 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

AS*14LSBCW series AS*18LSBCW

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

AS*14LSBCW series AS*18LSBCW

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.

1

1.5

2

2.5

0 5 10 15

Outdoor ambient temperature C

High-pressure of outdoor unit (Mpa)

Indoor inlet temp :15 C

Indoor inlet temp :20 C
Indoor inlet temp :23 C

Under construction

4.5

5

5.5

6

6.5

7

0 5 10 15

Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Indoor inlet temp :15 C
Indoor inlet temp :20 C
Indoor inlet temp :23 C

Under construction

3

3.2

3.4

3.6

3.8

4

0 5 10 15

Outdoor ambient temperature C

High-pressure of outdoor unit (Mpa)

6.5

7

7.5

8

8.5

9

0 5 10 15

Outdoor ambient temperature C

Outdoor Total Electric Current (A)

Indoor inlet temp :15 C
Indoor inlet temp :20 C
Indoor inlet temp :23 C

length

Indoor inlet temp :15 C

Indoor inlet temp :20 C
Indoor inlet temp :23 C

08-07

0.00 33.62 1.15 0.00 176.03 1.10

5.00 25.93 1.39 5.00 134.23 1.36

10.00 20.18 1.66 10.00 103.34 1.63

15.00 15.84 1.94 15.00 80.28 1.92

20.00 12.54 2.22 20.00 62.91 2.21

25.00 10.00 2.50 25.00 49.70 2.51

30.00 8.04 2.77 30.00 39.57 2.79

35.00 6.51 3.03 35.00 31.74 3.06

40.00 5.30 3.27 40.00 25.64 3.30

45.00 4.35 3.48 45.00 20.85 3.53

50.00 3.59 3.68 50.00 17.06 3.73

55.00 2.98 3.85 55.00 14.10 3.90

60.00 2.47 4.00 60.00 11.64 4.55

65.00 2.09 4.14 65.00 9.69 4.19

70.00 1.76 4.25 70.00 8.12 4.30

75.00 1.49 4.35 75.00 6.83 4.40

80.00 1.27 4.44 80.00 5.78 4.48

85.00 1.09 4.51 85.00 4.91 4.55

90.00 0.93 4.57 90.00 4.19 4.61

95.00 0.81 4.63 95.00 3.59 4.66

100.00

0.70

4.67

100.00

3.09

4.71

0.00 175.70 0.18 -20.00 49.20 2.66 -20.00 115.24 1.25

5.00 134.93 0.24 -15.00 36.58 3.02 -15.00 84.21 1.56

10.00 104.59 0.30 -10.00 27.51 3.35 -10.00 62.28 1.90

15.00 81.79 0.31 -5.00 20.91 3.64 -5.00 46.58 2.26

20.00 64.50 0.38 0.00 16.05 3.89 0.00 35.21 2.61

25.00 51.27 0.47 5.00 12.44 4.09 5.00 26.88 2.94

30.00 41.07 0.70 10.00 9.73 4.26 10.00 20.72 3.25

35.00 33.13 0.84 15.00 7.67 4.40 15.00 16.12 3.52

40.00 26.91 0.99 20.00 6.10 4.51 20.00 12.64 3.76

45.00 22.01 1.16 25.00 4.89 4.60 25.00 10.00 3.97

50.00 18.10 1.34 30.00 3.95 4.67 30.00 7.97 4.14

55.00 14.98 1.54 35.00 3.21 4.73 35.00 6.40 4.28

60.00 12.47 1.74 40.00 2.62 4.78 40.00 5.18 4.41

65.00 10.44 1.95 45.00 2.16 4.81 45.00 4.21 4.51

70.00 8.78 2.16 50.00 1.79 4.85 50.00 3.45 4.59

75.00 7.42 2.36 55.00 1.49 4.87 55.00 2.85 4.65

80.00 6.31 2.57 60.00 1.25 4.89 60.00 2.36 4.71

85.00 5.38 2.76 65.00 1.05 4.91 65.00 1.97 4.76

90.00 4.61 2.95 70.00 0.89 4.92 70.00 1.65 4.79

95.00 3.97 3.13 75.00 0.76 4.93 75.00 1.39 4.83

100.00 3.43 3.30 80.00 0.65 4.94 80.00 1.18 4.85

105.00 2.98 3.45 85.00 0.56 4.95 85.00 1.00 4.87

110.00 2.59 3.60 90.00 0.48 4.96 90.00 0.85 4.89

115.00 2.26 3.73 95.00 0.41 4.96 95.00 0.73 4.91

120.00

1.99

3.85

100.00

0.36

4.97

100.00

0.63

4.92

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

0.00 10.00 20.00 30.00 40.00 50.00 60.00

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.00

0.00 20.00 40.00 60.00 80.00

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.00

0.00 20.00 40.00 60.00 80.00 100.00 120.00

0.00

10.00

20.00

30.00

40.00

50.00

-20.00 0.00 20.00 40.00 60.00 80.00

0.00

20.00

40.00

60.00

80.00

100.00

120.00

-20.00 0.00 20.00 40.00 60.00

Thermistor resistance values

Room temperature thermistor

Temp ( C)

Resistance(k )

Voltage(V)

Indoor heat exchanger thermistor

Temp ( C)

Resistance(k )

Voltage(V)

Characteristics of room temperature thermistor

Resistance (k )

Temperature ( C)

Characteristics of heat exchanger thermistor (Indoor)

Resistance (k )

Temperature ( C)

Discharge thermistor

Temp ( C)

Resistance(k )

Voltage(V)

Outdoor heat exchanger thermistor

Temp ( C)

Resistance(k )

Voltage(V)

Temp ( C)

Resistance(k )

Voltage(V)

Outdoor temperature thermistor

Characteristics of discharge thermistor

Resistance (k )

Temperature ( C)

Resistance (k )

Temperature ( C)

Characteristics of heat exchanger thermistor (Outdoor)

Resistance (k )

Temperature ( C)

Characteristics of outdoor temperature thermistor

08-08

9 . INSTALLATION MANUAL

R410A

WALL MOUNTED type

INVERTER

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. 2). 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 direct

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 you neighbors into consideration so that they are not disturbed

by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 2 so that the air flow is not blocked.

Also for efficient operation, leave open three of the four directions

front, rear, and both sides.

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.

(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.
(4) Install the indoor unit on the wall where the height

from the floors more than 230 cm.

SELECTING THE MOUNTING
POSITION

[Indoor unit piping direction]

The piping can be connected in the five directions indicated by 1,
2, 3, 4, and 5 in (Fig. 1). 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. 1

2 Right

outlet

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(PART NO. 9312557011-01) AS*9/12LSAC

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) models,

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).

Special tools for R410A

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 us copper pipes thinner than 0.8mm even
when it is available on the market.

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

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.

Table 1 Thicknesses of Annealed Copper Pipes

Thickness (mm)

Nominal

diameter

1/4

3/8

Outer diameter

(mm)

6.35

9.52

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

SELECTING THE MOUNTING
POSITION

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. 2). 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 direct

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 you neighbors into consideration so that they are not disturbed

by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 2 so that the air flow is not blocked.

Also for efficient operation, leave open three of the four directions

front, rear, and both sides.

INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS

Fig. 2

[INDOOR UNIT]

6 cm or over

150 cm or over

5 cm or over

230 cm or over

Remote

control unit

Wall hook
bracket

9 cm or over

Wall cap

INDOOR UNIT

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.
(4) Install the indoor unit on the wall where the height

from the floors more than 230 cm.

[Indoor unit piping direction]

The piping can be connected in the five directions indicated by 1,
2, 3, 4, and 5 in (Fig. 1). 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.

Connection Cord

Conform to Type245 IEC57

[OUTDOOR UNIT]

60 cm or over

10 cm or over

60 cm or over

5 cm or over

25 cm or
over

Outdoor unit bottom

Fig. 1

(Rear)

2 Right

outlet

3 Bottom outlet

1 Rear outlet

4 Left rear

outlet

5 Left

outlet

Fig. 3

Drain hose

50 cm

26.5 cm

For authorized service personnel only.

(1) For the room air conditioner to operate satisfactory, install it as outlined in this installation manual.
(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available standards parts. This

installation manual describes the correct connections using the standard accessories and the parts specified in

this installation manual.
(3) Have installation work done by authorized service personnel only.
(4) Never cut the power cord, lengthen or shorten the cord, or change the plug.
(5) Also do not use an extension cord.
(6) Plug in the power cord plug firmly. If the receptacle is loose, repair it before using the room air conditioner.

(7) Do not turn on the power until all installation work is complete.

WARNING

● Be careful not to scratch the air conditioner when handling it.

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

● Let the customer keep this installation manual because it is used when the air conditioner is serviced or

moved.

● The maximum length of the piping is 15 m. The maximum height difference of the piping is 8 m,
if the units are further apart than these, correct operation can not be guaranteed.

STANDARD ACCESSORIES

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

Name and Shape Q’ty Name and Shape Q’ty

Connection pipe assembly

Connection cord

Wall pipe

Decorative tape

Vinyl tape

Wall cap

Saddle

Drain hose

Tapping screws

Sealant

Name

Wall hook bracket

Remote
control
unit

Battery Tapping screw (big)

(ø4 X 20)

Drain pipe

Cloth tape

1

1

28

1

One set of following parts are necessary in istallation of this product.

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.

1

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

● Do not set the unit directly on the ground because it will cause trou-

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.

LO

HI

OUTDOOR UNIT

LO

HI

OUTDOOR UNIT INSTALLATION

● 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 trou-

ble.

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.

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.

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.

Fig. 10

Tapping screw

Rear hook

Connector cover

CAUTION

(1) Refrigerant must not be discharged into

atmosphere.

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

gas leakage with gas leak detector.

OUTDOOR UNIT WIRING

(1) Remove the outdoor unit connector cover.
(2) Remove the control box cover.
(3) Bend the end of the cord as shown in the figure.
(4) Connect the end of the connection cord fully into the terminal block.

Connection cord wiring

Run the connection cord to the rear of the outdoor unit within the range
of the arrows shown in the figure.
(The connector cover becomes difficult to install.)

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.)

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.)

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 2.9 N•m (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.

Fig. 11

Gauge manifold

-0.1 MPa
(-76 cmHg

-1 bar)

Low pressure
side valve

Charge hose

Pressure gauge

High
pressure
side valve
(closed)

Charge
hose

Vacuum pump

3-way valve

Charging port cap

Compound pressure gauge

2-way valve

Flare nut

Valve stem

Blank cap

Charging port

Table 4

Tightening torque

Blank cap 19.6 to 24.5 N•m (200 to 250 kgf•cm)

Charging port cap 12.3 to 15.7 N•m (125 to 160 kgf•cm)

(1) Match the terminal block numbers and connection

(2) Connect the connection cords firmly to the terminal

FINISHING

(1) Insulate between pipes.

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

● For left and left rear piping, butt the connection pipe heat insulation and indoor unit

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

● For left and left rear piping, bind the connection cord to the top of the pipe with vinyl

● For left and left rear piping, bundle the piping and drain hose together by wrapping

(2) Temporarily fasten the connection cord along the connection pipe with vinyl tape. (Wrap

(3) Fasten the connection pipe to the outside wall with saddles, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with sealer so that rain

(5) Fasten the drain hose to the outside wall, etc.

Fig. 15

INDOOR UNIT

CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

(1) Cut a 65 mm diameter hole in the wall at the position shown in (Fig.

4).

(2) When cutting the wall hole at the inside of the installation frame, cut

the hole within the range of the left and right center marks 40 mm
below the installation frame.
When cutting the wall hole at the outside of the installation frame,
cut the hole at least 10 mm below over.

(3) Cut the hole so that the outside end is lower (5 to 10 mm) than the

inside end.

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

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. 4)

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

water will flow freely. (Fig. 4)

INSTALLING THE WALL HOOK BRACKET

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

tally and vertically. If the wall hook bracket is tiled, water will drip to
the floor.

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

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. 4

Fasten with
vinyl tape

(Wall cap)

Fig. 5

Wall hook bracket

Lower

65 mm dia. hole

(Wall pipe)

(Inside)

Wall (Outside)

Center mark

5 to 10
mm low

10 mm
or over

65 mm dia. hole

Center notch

Lower

Hook

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

● Bend the connection piping at the bend radius of 70 mm or more and

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

[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

CONNECTING THE PIPING

CONNECTION

(1) Install the outdoor unit wall cap (supplied with the optional installation set

(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface and tightening the nut hand

WARNING

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

CAUTION

Install the wall hook bracket horizontally and
perpendicularly.

FORMING THE DRAIN HOSE AND PIPE

[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. 6)

● 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.

CAUTION

After removing the drain hose, do not forget to install
the drain cap.

Fig. 6

Right piping

Tapping screw

Indoor unit drain hose

Bottom

(bottom)

piping

Wall hook
bracket

Bind with vinyl tape

Pipe (top)
Rear piping

String

FLARING

(1) Cut the connection pipe to the necessary

(2) Hold the pipe downward so that cuttings

(3) Insert the flare nut onto the pipe and flare

Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
flare processing with a flare tool.
Use the special R410A flare tool, or the conv-
entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 3 .

INDOOR UNIT WIRING

(1) Remove the cord clamp.
(2) Bend the end of the connection cord as shown in the figure.

Fig. 9

Drain cap

Insert the drain cap and drain hose
until it butts against the drain port.

Indoor unit
drain hose

Indoor unit
drain hose

Drain cap

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

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

● 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 the bend radius of 70 mm or more and

install no more than 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. 7

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.

CONNECTING THE PIPING

CONNECTION

(1) Install the outdoor unit wall cap (supplied with the optional installation 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.

(Table 2)

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.

Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
flare processing with a flare tool.
Use the special R410A flare tool, or the conv­entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 3 .

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

Table 2 Flare nut tightening torque

Indoor unit

Wall hook bracket

(Spacer)

Connection pipe
(6.35 mm dia.)

Connection pipe
(9.52 mm dia.)

Align the marks.

Top hooks

Indoor unit

(Fitting)

Bottom hooks

Wall hook
bracket

Fig. 8

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.

Bend (R70) with
a pipe bender

Flare nut

6.35 mm dia.

9.52 mm dia.

Tightening torque

15.7 to 17.6 N•m

(160 to 180 kgf•cm)

29.4 to 41.1 N•m

(300 to 420 kgf•cm)

Tightening torque standard

(using a 20 cm wrench)

Wrist strength

Arm strength

A (mm)

Table 3 Pipe outside diameter

Pipe outside

diameter

ø 6.35 mm (1/4”)
ø 9.52 mm (3/8”)

Flash tool for

R410A, clutch type

0 to 0.5
0 to 0.5

Conventional (R22) flare tool

Clutch type

1.0 to 1.5

1.0 to 1.5

Wing nut type

1.5 to 2.0

1.5 to 2.0

(1) Remove the cord clamp.
(2) Bend the end of the connection cord as shown in the figure.

(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.

(3) Always fasten the outside covering of the connec-

tion 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 sc r ew for an external connector .

Only use for interconnection between two units.

Fig. 9

Right bottom of
indoor unit

CAUTION

(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the connection cord with a cord clamp.

INDOOR UNIT WIRING

Insert the tab into the square hole of the
indoor unit and fasten with a screw.

Connection cord

40 mm

12 mm

50 mm

12 mm

5 mm

5 mm

Screw

Cord clamp (There

is a terminal block

inside.)

Connection

cord

Square
hole

Screw

Tab

Cord clamp

Die

A

Pipe

OUTDOOR UNIT WIRING

(1) Remove the outdoor unit connector cover.
(2) Remove the control box cover.
(3) Bend the end of the cord as shown in the figure.
(4) Connect the end of the connection cord fully into the terminal block.

(5) Fasten the sheath with a cord clamp.
(6) Install the control box cover.
(7) Install the connector cover.

Fig. 12

Control box

Control box cover

Cord clamp

Connector cord

Connection cord wiring

Run the connection cord to the rear of the outdoor unit within the range
of the arrows shown in the figure.
(The connector cover becomes difficult to install.)

Cord clamp

Earth screw

Fig. 13

Sheath

Earth screw

Outdoor unit terminal blockIndoor unit terminal block

Connection cord

12mm

50mm

5mm

5mm

Earth screw

Control box cover

12mm

25mm

CAUTION

(1) Match the terminal block numbers and connection

cord colors with those of the indoor 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.

(3) Always fasten the outside covering of the connec-

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

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 insulation 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 saddles, 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.

Wall

(Outside wall cap)

(Sealer putty)

(Outdoors)

Fig. 15

(Saddle)

Pipe

Connector cord

tion cord with the cord clamp. (If the insulator is
chafed, electric leakage may occur.)

Only use for interconnection between two units.

Pipe

Drain hose

Drain hose

Drain hose

Saddle

Overlap the insulation

Indoor unit pipe
(heat insullation)

Vinyl tape

Wrap with cloth tape

Cloth tape

For connection from the left rear

Wall pipe

Drain hose

BAD

Lifted up

BAD BAD

Wave End in water

Connection cord

Connection
pipe

Fig. 14

Connection pipe
(heat insulation)

Bind the pipes together so
that there is no gap.

Left piping

Connection cord

Pipe

Check the following:

GOOD

Install the front panel and intake
grille securely. If installation is
imperfect, the front panel or intake
grille may fall off and cause injury.

Be sure that the top hole of the front
panel is hooked securely to the hook
of the base.

FRONT PANEL REMOVAL AND INSTALLATION

THE OPEN PANEL

(1) Pull the Open Panel to 90° ahead of you, then open it.
(2) Pull down the knob.
(3) Lift the intake grille upward.

THE OPEN PANEL INSTALLATION

(1) Pull the Open Panel to 90° ahead of you, insert the mounting shafts into the

hole of the hinge and install it.

(2) Close the Open Panel.

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 bottom

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

TEST RUNNING

● 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?

Transmitter section

Fig. 17

Be sure that the top hole of the front
panel is hooked securely to the hook
of the base.

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.

CUSTOMER GUIDANCE

CAUTION

Install the front panel and intake
grille securely. If installation is
imperfect, the front panel or intake
grille may fall off and cause injury.

Fig. 16

POWER

Test run button

WARNING

(1) The rated voltage of this product is 230 V AC 50 Hz.
(2) Before turning on the power, check if the voltage is within

the 220 V -10 % to 240 V +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 standards 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 company

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.

NOTE:

These equipment shall be connected to a suitable mains network with a

main impedance less than the following: 0. 424

Ω

The product is intended for use only in premises having a service current
capacity

100A per phase,supplied from a distribution network having a
nominal voltage of 230 V, and instruct the user to determine in consulation
with the supply authority, if necessary, that the service current capacity at
the interface point is sufficient for the equipment.

Front panel

Screws
(4 position)

Push

Push

[-] mark

Front panel

Bottom hole

(six position)

Front panel

Indoor unit

Bottom hooks

(six position)

Top holes (two sides)

Top hole (center)

Top hook (center)

Front panel

Top hooks

(two sides)

Indoor unit

Open Panel

Hinge

hole

Mounting

Shaft

For authorized service personnel only.

(1) For the room air conditioner to operate satisfactory, install it as outlined in this installation manual.
(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available standards parts. This

installation manual describes the correct connections using the standard accessories and the parts specified in

this installation manual.
(3) Have installation work done by authorized service personnel only.
(4) Never cut the power cord, lengthen or shorten the cord, or change the plug.
(5) Also do not use an extension cord.
(6) Plug in the power cord plug firmly. If the receptacle is loose, repair it before using the room air conditioner.
(7) Do not turn on the power until all installation work is complete.

WARNING

● Be careful not to scratch the air conditioner when handling it.

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

● Let the customer keep this installation manual because it is used when the air conditioner is serviced or moved.

● The maximum length of the piping is 20 m. The maximum height difference of the piping is 15 m,

if the units are further apart than these, correct operation can not be guaranteed.

STANDARD ACCESSORIES

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

Name and Shape Q’ty Name and Shape Q’ty

Connection pipe assembly

Connection cord

Wall pipe

Decorative tape

Vinyl tape

Wall cap

Saddle

Drain hose

Tapping screws

Sealant

Name

Wall hook bracket

Remote
control
unit

Battery

Tapping screw (big)

Cloth tape

1

1

2

One set of following parts are necessary in istallation of this product.

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.

1

8

2

Tapping screw (small)

Air cleaning filter

2

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. 2). 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 direct

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 you neighbors into consideration so that they are not disturbed

by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 2 so that the air flow is not blocked.

Also for efficient operation, leave open three of the four directions

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.
(4) Install the indoor unit on the wall where the height

from the floors more than 230 cm.

SELECTING THE MOUNTING
POSITION

[Indoor unit piping direction]

The piping can be connected in the five directions indicated by 1,
2, 3, 4, and 5 in (Fig. 1). 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.

INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS

Fig. 2

[INDOOR UNIT]

Remote

control unit

Fig. 1

1 Rear outlet

2 Right

outlet

3 Bottom outlet

4 Left rear

outlet

5 Left

outlet

Connection Cord

Conform to Type245 IEC57

[OUTDOOR UNIT]

10 cm or over

60 cm or over

10 cm or over

20 cm or over

25 cm or
over

(Rear)

FRONT PANEL REMOVAL AND INSTALLATION

TEST RUNNING

● 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?

Transmitter section

Fig. 5

Be sure that the top hole of the front
panel is hooked securely to the hook of
the base.

Explain the following to the customer in ac­cordance with the operating manual:
(1) Starting and stopping method, opera-

tion 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.

CUSTOMER GUIDANCE

CAUTION

Install the front panel and INTAKE
GRILLE securely. If installation is
imperfect, the front panel or INTAKE
GRILLE may fall off and cause injury.

Fig. 4

POWER

Test run button

WARNING

(1) The rated voltage of this product is 230 V AC 50 Hz.
(2) Before turning on the power, check if the voltage is within

the 220 V -10 % to 240 V +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 ca-

pacity of the air conditioner.
(5) Do not extend the power cord.
(6) Perform wiring work in accordance with standards 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 company

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.

Bottom hole

(six position)

Front panel

Indoor unit

Bottom hooks

(six position)

Top holes (two sides)

Top hole (center)

Top hook (center)

Front panel

Top hooks

(two sides)

Indoor unit

Installation instruction on the back.

Tapping

screw

(small)

Remote

control unit

holder

6 cm or over

Wall hook bracket

5 cm or over

9 cm or over

150 cm or over

(Wall cap)

230 cm or over

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 in-

take 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

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

Wall hook bracket

Front panel

Push

[-] mark

Push

Front panel

Bearing

Mounting shaft

Intake grille

Intake grille

Knob

Front panel

Screws

(4 position)

Fig. 3

54 cm

32 cm

Drain hose

Outdoor unit bottom

Remote control
unit holder

1

Air cleaning filter frame

2

Drain pipe

1

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(PART NO. 9313209018-01) AS*9/12LSBC

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) models,

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).

Special tools for R410A

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 us copper pipes thinner than 0.8mm even
when it is available on the market.

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

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.

Table 1 Thicknesses of Annealed Copper Pipes

(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

Thickness (mm)

Nominal
diameter

1/4

3/8

Outer diameter

(mm)

6.35

9.52

R410A

0.80

0.80

[ref.] R22

0.80

0.80

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 insulation 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 saddles, 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. 17

Fig. 16

Pipe

(Saddle)

(Outside wall cap)

(Sealer putty)

(Outdoors)

Pipe

Drain hose

Cloth tape

Wrap with cloth tape

Left piping

Connection cord

Pipe

Drain hose

For connection from the left rear

Connection cord

Wall pipe

Connection
pipe

Check the following:

GOOD

Lifted up

Saddle

Wave End in water

Overlap the insulation

Bind the pipes together so
that there is no gap.

Connection pipe
(heat insulation)

Vinyl tape

Wall

Indoor unit pipe
(heat insullation)

Drain hose

BAD

BAD BAD

Drain hose

P/N 9313209018-01

LO

HI

INDOOR UNIT

CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

(1) Cut a 65 mm diameter hole in the wall at the position shown in (Fig.

6).

(2) When cutting the wall hole at the inside of the installation frame, cut

the hole within the range of the left and right center marks 40 mm
below the installation frame.
When cutting the wall hole at the outside of the installation frame,
cut the hole at least 10 mm below over.

(3) Cut the hole so that the outside end is lower (5 to 10 mm) than the

inside end.

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

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. 6)

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

water will flow freely. (Fig. 6)

INSTALLING THE WALL HOOK BRACKET

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

tally and vertically. If the wall hook bracket is tiled, water will drip to
the floor.

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

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.

FORMING THE DRAIN HOSE AND PIPE

WARNING

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

CAUTION

Install the wall hook bracket horizontally and
perpendicularly.

[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. 8)

● 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.

CAUTION

After removing the drain hose, do not forget to install
the drain cap.

Fig. 6

Lower

Center mark

Fasten with
vinyl tape

(Wall cap)

(Wall pipe)

(Inside)

5 to 10
mm low

Wall (Outside)

65 mm dia. hole

Fig. 7

Wall hook bracket

Center notch

Hook

Fig. 8

Right piping

Bind with vinyl tape

Indoor unit drain hose
(bottom)

Pipe (top)
Rear piping

Bottom

piping

Drain cap

Indoor unit
drain hose

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

Lower

10 mm
or over

Insert the drain cap and drain hose
until it butts against the drain port.

Drain cap

Indoor unit
drain hose

65 mm dia. hole

Tapping screw

Wall hook
bracket

String

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

● 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 the bend radius of 70 mm or more and

install no more than 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. 9

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.

CONNECTING THE PIPING

CONNECTION

(1) Install the outdoor unit wall cap (supplied with the optional installation 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.
(Table 2)

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.

Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
flare processing with a flare tool.
Use the special R410A flare tool, or the conv­entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 3 .

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

Table 2 Flare nut tightening torque

Connection pipe
(6.35 mm dia.)

Connection pipe
(9.52 mm dia.)

Align the marks.

Top hooks

Indoor unit

(Fitting)

Bottom hooks

Wall hook
bracket

Fig. 10

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.

Bend (R70) with
a pipe bender

Table 3 Pipe outside diameter

(1) Remove the cord clamp.
(2) Bend the end of the connection cord as shown in the figure.

(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.

(3) Always fasten the outside covering of the connec-

tion 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.

Fig. 11

CAUTION

(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the connection cord with a cord clamp.

INDOOR UNIT WIRING

Connection cord

40 mm

12 mm

50 mm

12 mm

5 mm

5 mm

Die

A

Pipe

Indoor unit

Wall hook bracket

(Spacer)

Right bottom of
indoor unit

Cord clamp

(There is a

terminal block

inside.)

Screw

Connection cord

Cord clamp

Tab

Screw

Square hole

Insert the tab into the square hole of the
indoor unit and fasten with a screw.

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 trou-

ble.

Connector cover removal

● Remove the tapping screws.

Installing the connector cover

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

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.

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.)

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 2.9 N

•

m (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.

Fig. 12

Tapping screw

Rear hooks

Connector cover

Fig. 13

Flare nut

3-way valve

-0.1 MPa
(-76 cmHg

-1 bar)
High
pressure
side valve
(closed)

Low pressure
side valve

Blank cap

Charge
hose

Vacuum pump

CAUTION

(1) Refrigerant must not be discharged into

atmosphere.

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

gas leakage with gas leak detector.

2-way valve

Valve stem

Charge hose

Charging port cap

Charging port

Gauge manifold

Compound pressure gauge

Pressure gauge

Front hooks

OUTDOOR UNIT WIRING

(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cord as shown in the figure.
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Install the connector cover.

Connection cord wiring

Run the connection cord to the rear of the outdoor unit within the A
range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)

(1) Match the terminal block numbers and connection

cord colors with those of the indoor 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.

(3) Always fasten the outside covering of the connec-

tion 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.

Fig. 15

Connector cord

CAUTION

45mm

12mm

5mm

5mm

12mm

30mm

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 20 m. If

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

Additional charge

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

Pipe length

Additional refrigerant

Table 5

15 m

None

Between 15 m and 20 m, when using a connection pipe other than
that in the table, charge additional refrigerant with 20g/1 m as the
criteria.

20 m

100 g

Fig. 14

Connector cord

Cord clamp

Control box

Sheath

Cord clamp

Earth screw

Outdoor unit terminal blockIndoor unit terminal block

Connection cord

Earth screw

Earth screw

Table 4

Tightening torque

Blank cap 19.6 to 24.5 N

•

m (200 to 250 kgf • cm)

Charging port cap 12.3 to 15.7 N

•

m (125 to 160 kgf • cm)

Flare nut

6.35 mm dia.

9.52 mm dia.

Tightening torque

15.7 to 17.6 N

• m

(160 to 180 kgf

• cm)

29.4 to 41.1 N

• m

(300 to 420 kgf

• cm)

Tightening torque standard

(using a 20 cm wrench)

Wrist strength

Arm strength

A (mm)

Pipe outside

diameter

ø 6.35 mm (1/4”)
ø 9.52 mm (3/8”)

Flash tool for

R410A, clutch type

0 to 0.5
0 to 0.5

Conventional (R22) flare tool

Clutch type

1.0 to 1.5

1.0 to 1.5

Wing nut type

1.5 to 2.0

1.5 to 2.0

For authorized service personnel only.

(1) For the room air conditioner to operate satisfactory, install it as outlined in this installation manual.
(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available standards parts. This

installation manual describes the correct connections using the standard accessories and the parts specified in

this installation manual.
(3) Have installation work done by authorized service personnel only.
(4) Never cut the power cord, lengthen or shorten the cord, or change the plug.
(5) Also do not use an extension cord.
(6) Plug in the power cord plug firmly. If the receptacle is loose, repair it before using the room air conditioner.
(7) Do not turn on the power until all installation work is complete.

WARNING

● Be careful not to scratch the air conditioner when handling it.

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

● Let the customer keep this installation manual because it is used when the air conditioner is serviced or moved.

● The maximum length of the piping is 20 m. The maximum height difference of the piping is 10 m,

if the units are further apart than these, correct operation can not be guaranteed.

STANDARD ACCESSORIES

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

Name and Shape Q’ty Name and Shape Q’ty

Connection pipe assembly

Connection cord

Wall pipe

Decorative tape

Vinyl tape

Wall cap

Saddle

Drain hose

Tapping screws

Sealant

Name

Wall hook bracket

Remote
control
unit

Battery

Tapping screw (big)

Cloth tape

1

1

2

One set of following parts are necessary in istallation of this product.

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.

Remote control
unit holder

1

1

8

2

Tapping screw (small)

Air cleaning filter

2

Air cleaning filter frame

2

Seal A

1

Drain pipe

1

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. 2). 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 direct

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 you neighbors into consideration so that they are not disturbed

by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 2 so that the air flow is not blocked.

Also for efficient operation, leave open three of the four directions

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.
(4) Install the indoor unit on the wall where the height

from the floors more than 230 cm.

SELECTING THE MOUNTING
POSITION

[Indoor unit piping direction]

The piping can be connected in the five directions indicated by 1,
2, 3, 4, and 5 in (Fig. 1). 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.

INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS

Fig. 2

[INDOOR UNIT]

Remote

control unit

Fig. 1

1 Rear outlet

2 Right

outlet

3 Bottom outlet

4 Left rear

outlet

5 Left

outlet

Connection Cord

Conform to Type245 IEC57

[OUTDOOR UNIT]

10 cm or over

60 cm or over

10 cm or over

30 cm or over

30 cm or
over

(Rear)

FRONT PANEL REMOVAL AND INSTALLATION

TEST RUNNING

● 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?

Transmitter section

Fig. 5

Be sure that the top hole of the front
panel is hooked securely to the hook of
the base.

Explain the following to the customer in ac­cordance with the operating manual:
(1) Starting and stopping method, opera-

tion 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.

CUSTOMER GUIDANCE

CAUTION

Install the front panel and INTAKE
GRILLE securely. If installation is
imperfect, the front panel or INTAKE
GRILLE may fall off and cause injury.

Fig. 4

POWER

Test run button

WARNING

(1) The rated voltage of this product is 230 V AC 50 Hz.
(2) Before turning on the power, check if the voltage is within

the 220 V -10 % to 240 V +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 ca-

pacity of the air conditioner.
(5) Do not extend the power cord.
(6) Perform wiring work in accordance with standards 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 company

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.

Bottom hole

(six position)

Front panel

Indoor unit

Bottom hooks

(six position)

Top holes (two sides)

Top hole (center)

Top hook (center)

Front panel

Top hooks

(two sides)

Indoor unit

Installation instruction on the back.

Tapping

screw

(small)

Remote

control unit

holder

6 cm or over

Wall hook bracket

5 cm or over

9 cm or over

150 cm or over

(Wall cap)

230 cm or over

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 in-

take 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

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

Wall hook bracket

Front panel

Push

[-] mark

Push

Front panel

Bearing

Mounting shaft

Intake grille

Intake grille

Knob

Front panel

Screws

(4 position)

Fig. 3

54 cm

32 cm

Drain hose

Outdoor unit bottom

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(PART NO. 9313802028-01) AS*14/18LSBC

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) models,

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).

Special tools for R410A

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 us copper pipes thinner than 0.8mm even
when it is available on the market.

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

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.

Table 1 Thicknesses of Annealed Copper Pipes

(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

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

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 insulation 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 saddles, 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. 17

Fig. 16

Pipe

(Saddle)

(Outside wall cap)

(Sealer putty)

(Outdoors)

Pipe

Drain hose

Cloth tape

Wrap with cloth tape

Left piping

Connection cord

Pipe

Drain hose

For connection from the left rear

Connection cord

Wall pipe

Connection
pipe

Check the following:

GOOD

Lifted up

Saddle

Wave End in water

Overlap the insulation

Bind the pipes together so
that there is no gap.

Connection pipe
(heat insulation)

Vinyl tape

Wall

Indoor unit pipe
(heat insullation)

Drain hose

BAD

BAD BAD

Drain hose

P/N 9313802028-01

LO

HI

INDOOR UNIT

CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

(1) Cut a 65 mm diameter hole in the wall at the position shown in (Fig.

6).

(2) When cutting the wall hole at the inside of the installation frame, cut

the hole within the range of the left and right center marks 40 mm
below the installation frame.
When cutting the wall hole at the outside of the installation frame,
cut the hole at least 10 mm below over.

(3) Cut the hole so that the outside end is lower (5 to 10 mm) than the

inside end.

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

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. 6)

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

water will flow freely. (Fig. 6)

INSTALLING THE WALL HOOK BRACKET

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

tally and vertically. If the wall hook bracket is tiled, water will drip to
the floor.

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

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.

FORMING THE DRAIN HOSE AND PIPE

WARNING

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

CAUTION

Install the wall hook bracket horizontally and
perpendicularly.

[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. 8)

● 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.

CAUTION

After removing the drain hose, do not forget to install
the drain cap.

Fig. 6

Lower

Center mark

Fasten with
vinyl tape

(Wall cap)

(Wall pipe)

(Inside)

5 to 10
mm low

Wall (Outside)

65 mm dia. hole

Fig. 7

Wall hook bracket

Center notch

Hook

Fig. 8

Right piping

Bind with vinyl tape

Indoor unit drain hose
(bottom)

Pipe (top)
Rear piping

Bottom

piping

Drain cap

Indoor unit
drain hose

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

Lower

10 mm
or over

Insert the drain cap and drain hose
until it butts against the drain port.

Drain cap

Indoor unit
drain hose

65 mm dia. hole

Tapping screw

Wall hook
bracket

String

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

● 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 the bend radius of 70 mm or more and

install no more than 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. 9

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.

CONNECTING THE PIPING

CONNECTION

(1) Install the outdoor unit wall cap (supplied with the optional installation 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.
(Table 2)

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.

Insert the flare nut (always use the flare nut
attached to the indoor and outdoor units
respectively) onto the pipe and perform the
flare processing with a flare tool.
Use the special R410A flare tool, or the conv­entional (for R22) flare tool.
When using the conventional flare tool, always
use an allowance adjustment gauge and secure
the A dimension shown in table 3 .

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

Table 2 Flare nut tightening torque

Connection pipe
(6.35 mm dia.)

Connection pipe
(12.7 mm dia.)

Align the marks.

Top hooks

Indoor unit

(Fitting)

Bottom hooks

Wall hook
bracket

Fig. 10

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.

Bend (R70) with
a pipe bender

Flare nut

6.35 mm dia.

12.7 mm dia.

Tightening torque

15.7 to 17.6 N•m

(160 to 180 kgf•cm)

49.0 to 53.9 N•m

(500 to 550 kgf•cm)

Tightening torque standard

(using a 20 cm wrench)

Wrist strength

Arm strength

A (mm)

Table 3 Pipe outside diameter

Pipe outside

diameter

ø 6.35 mm (1/4”)
ø 12.7 mm (3/8”)

Flash tool for

R410A, clutch type

0 to 0.5
0 to 0.5

Conventional (R22) flare tool

Clutch type

1.0 to 1.5

1.0 to 1.5

Wing nut type

1.5 to 2.0

1.5 to 2.0

(1) Remove the cord clamp.
(2) Bend the end of the connection cord as shown in the figure.

(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.

(3) Always fasten the outside covering of the connec-

tion 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 sc r ew for an external connector.

Only use for interconnection between two units.

Fig. 11

CAUTION

(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the connection cord with a cord clamp.

INDOOR UNIT WIRING

Connection cord

40 mm

12 mm

50 mm

12 mm

5 mm

5 mm

Die

A

Pipe

Indoor unit

Wall hook bracket

(Spacer)

Right bottom of
indoor unit

Cord clamp

(There is a

terminal block

inside.)

Screw

Connection cord

Cord clamp

Tab

Screw

Square hole

Insert the tab into the square hole of the
indoor unit and fasten with a screw.

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 trou-

ble.

Connector cover removal

● Remove the tapping screws.

Installing the connector cover

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

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.

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.)

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 2.9 N•m (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.

Fig. 12

Tapping screw

Rear hooks

Connector cover

Fig. 13

Flare nut

3-way valve

-0.1 MPa
(-76 cmHg

-1 bar)
High
pressure
side valve
(closed)

Low pressure
side valve

Blank cap

Charge
hose

Vacuum pump

CAUTION

(1) Refrigerant must not be discharged into

atmosphere.

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

gas leakage with gas leak detector.

2-way valve

Valve stem

Charge hose

Charging port cap

Charging port

Gauge manifold

Compound pressure gauge

Pressure gauge

Front hooks

OUTDOOR UNIT WIRING

(1) Remove the outdoor unit connector cover.
(2) Bend the end of the cord as shown in the figure.
(3) Connect the end of the connection cord fully into the terminal block.
(4) Fasten the sheath with a cord clamp.
(5) Install the connector cover.

Connection cord wiring

Run the connection cord to the rear of the outdoor unit within the A
range of the arrows shown in the figure.
(The connector cover becomes difficult to install.)

(1) Match the terminal block numbers and connection

cord colors with those of the indoor 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.

(3) Always fasten the outside covering of the connec-

tion 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.

Fig. 15

Connector cord

CAUTION

25mm

12mm

5mm

5mm

12mm

30mm

Table 4

Tightening torque

Blank cap (2-way valve) 19.6 to 24.5 N•m (200 to 250 kgf•cm)

Blank cap (3-way valve) 27.4 to 31.4 N•m (280 to 320 kgf•cm)

Charging port cap 12.3 to 15.7 N•m (125 to 160 kgf•cm)

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 20 m. If

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

Additional charge

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

Pipe length

Additional refrigerant

Table 5

15 m

None

Between 15 m and 20 m, when using a connection pipe other than
that in the table, charge additional refrigerant with 20g/1 m as the
criteria.

20 m

100 g

Fig. 14

Connector cord

Cord clamp

Control box

Sheath

Cord clamp

Earth screw

Outdoor unit terminal blockIndoor unit terminal block

Connection cord

Earth screw

Earth screw

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

GS17032005

March 2005 Printed in Japan