Fujitsu AW*Z24LBC, AO*Z24LBT Service Instruction

SPLIT TYPE
ROOM AIR CONDITIONER

CEILING WALL

type

Models Indoor unit Outdoor unit

AW Z24LBC

AO Z24LBT

INVERTER

SERVICE

INSTRUCTION

R410A

CONTENTS

1. SPECIFICATION

AW *Z24LBC, AO*Z24LBT.............................................................................................

2. DIMENSIONS

AW *Z24LBC, AO*Z24LBT.............................................................................................

3. REFRIGERANT SYSTEM DIAGRAM

AW *Z24LBC, AO*Z24LBT.............................................................................................

4. CIRCUIT DIAGRAM

AW *Z24LBC, AO*Z24LBT.............................................................................................

5. DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION..............................................................................................

3. DRY OPERATION......................................................................................................

2. HEATING OPERATION..............................................................................................

5. INDOOR FAN CONTROL...........................................................................................

4. AUTO CHANGEOVER OPERATION.........................................................................

7. LOUVER CONTROL...................................................................................................

6. OUTDOOR FAN CONTROL.......................................................................................

9. TIMER OPERATION CONTROL................................................................................

8. COMPRESSOR CONTROL........................................................................................

11. TEST OPERATION CONTROL..................................................................................

10. ELECTRONIC EXPANSION VALVE CONTROL........................................................

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

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

15. MANUAL AUTO OPERATION ( Indoor unit body operation ).....................................

14. AUTO RESTART........................................................................................................

16. FORCED COOLING OPERATION.............................................................................

18. COIL DRY OPERATION CONTROL..........................................................................

17. COMPRESSOR PREHEATING..................................................................................

20. DEFROST OPERATION CONTROL..........................................................................

22. VARIOUS PROTECTIONS.........................................................................................

21. OFF DEFROST OPERATION CONTROL..................................................................

01-01

02-01

03-01

04-01

05-01
05-02
05-03
05-04
05-05
05-07
05-08
05-09
05-10
05-12
05-12

05-12
05-12
05-13
05-13
05-13
05-13

19. UV FILTER CLEANING CONTROL............................................................................ 05-14

05-16
05-18
05-19

05-12

6. REFRIGERANT CAUTION -R410A-

1. R410A TOOLS............................................................................................................

3. PRECAUTION FOR SERVICING...............................................................................

2. PRECAUTION FOR INSTALLATION.........................................................................

5. DEFFERENCE FROM CONVENTIONAL MODEL(R22) AND PRECAUTIONS........

4. NEW REFRIGERANT R410A.....................................................................................

7. TROUBLE SHOOTING

1. WHEN THE UNIT DOES NOT OPERATE AT ALL....................................................

3. TROUBLE SHOOTING METHOD

2. SELF DIAGNOSIS FUNCTION..................................................................................

1. EXPLODED VIEW......................................................................................................

2. INVERTER ASSEMBLY SPECIFICATION.................................................................

8. APPENDING DATA

1. JUMPER SETTING OF INDOOR UNIT AND OUTDOOR UNIT................................

3. CAPACITY/INPUT DATA............................................................................................

4. THERMISTOR RESISTANCE VALUES............................................... .....................

2. OUTDOOR UNIT PRESSURE VALUE AND TOTAL ELECTRIC

CURRENT CURVE...................................................................................................

9. REPLACEMENT PARTS

10. INSTALLATION MANUAL

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

5. SERIAL SIGNAL DIAGNOSIS....................................................................................

6. IPM PROTECTION.....................................................................................................

8. TROUBLE SHOOTING OF REFRIGERANT CYCLE.................................................

06-01
06-02
06-04
06-05
06-08

07-01
07-02

07-03
07-07

07-08

7. ACTIVE FILTER FAILURE..........................................................................................07-09

08-01

08-02
08-04
08-06

09-01
09-18

07-10

1 . SPECIFICATIONS

R410A

CEILING WALL type

INVERTER

HEATING CAPACITY

POWER SUPPLY

RUNNING
CURRENT

COOLING

HEATING

10.3 A

INPUT WATTS

COOLING

HEATING

2.35 kW

E.E.R.

COOLING

HEATING

COOLING

HEATING

3.62 kW/kW

MOISTURE REMOVAL

AIR CIRCULATION
HIGH

Cooling and heating inverter

AW *Z24LBC

AO*Z24LBT

7.1 kW

8.5 kW

TYPE

INDOOR UNIT

OUTDOOR UNIT

COOLING CAPACITY

230 V 50 Hz

9.7 A

2.21 kW

3.0 L/hr

3.21 kW/kW

ELECTRICAL DATA

POWER SOURCE 230 V

HIGH SPEED

1,500 r.p.m. / 1,700 r.p.m.

HIGH2 1,700 r.p.m. / 1,850 r.p.m.

INDOOR UNIT
( cool / heat )

MED SPEED

1,370 r.p.m. / 1,540 r.p.m.

SUPER QUIET

1,030 r.p.m. / 1,120 r.p.m.

QUIET

1,130 r.p.m. / 1,260 r.p.m.

LOW SPEED

1,250 r.p.m. / 1,390 r.p.m.

OUTDOOR UNIT ( cool / heat )

850 r.p.m. / 900 r.p.m.

FAN MOTOR

DIMENSIONS and WEIGHT

INDOOR UNIT

H x W x D

OUTDOOR UNIT

830 x 900 x 330 mm

250 x 899 x 298 mm

INDOOR UNIT Gross / Net

H x W x D

Gross / NetOUTDOOR UNIT 70 kg / 62 kg

17.5 kg / 14 kg

REFRIGERANT CHARGE (R410A)

FULL CHARGE

2,100 g

15 m

20 m

25 m

30 m

Pipe Length

2,200 g

1,900 g

2,000 g

ADDITIONAL CHARGE

20 g/m

MAX PIPE LENGTH

30 m

COMPRESSOR

TYPE

DISCRIMINATION

REFRIGERANT

R410A 1,900 g

5KD240XAD21

Hermetic type, DC Inverter,

Twin rotary

SPECIFICATIONS

HIGH SPEED

HIGH SPEED

880 m3/hr

980 m

3

/hr

47 dB / 47 dB

43 dB / 43 dB

40 dB / 40 dB

36 dB / 36 dB

32 dB / 32 dB

53 dB / 54 dB

HIGH2 49 dB / 49 dB

HIGH2 53 dB / 54 dB

INDOOR UNIT
( cool / heat )

MED SPEED

LOW SPEED

SUPER QUIET

QUIET

OUTDOOR UNIT
( cool / heat )

NOISE LEVEL

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

"HIGH2" means when ability measurement.

01-01

2 . DIMENSIONS

R410A

CEILING WALL type

INVERTER

(Unit : mm)

DIMENSIONS

INDOOR UNIT

02-01

Models :

AW * Z24LBC

300

298

899

250

170

40

OUTDOOR UNIT
(unit : mm)

77900

830

21

9

400

33031 12

196

147

170

99

370

650

Air Flow

02-02

Models :

AO * Z24LBT

3 . REFRIGERANT SYSTEM DIAGRAM

R410A

CEILING WALL type

INVERTER

REFRIGERANT SYSTEM DIAGRAM

2-Way valve
(Small)

3-Way valve
(Large)

Strainer

Strainer

Muffler

Pressure
switch

4-Way valve

Expansion valve

Heat exchanger

( INDOOR )

Heat exchanger

( OUTDOOR )

Sub-accumulator

Compressor

Refrigerant pipe diameter
Liquid : 1/4" (6.35 mm)
Gas : 5/8" (15.88 mm)

Cooling
Heating

03-01

Models : AW * Z24LBC / AO * Z24LBT

4 . CIRCUIT DIAGRAM

R410A

CEILING WALL type

INVERTER

INDOOR UNIT

CIRCUIT DIAGRAM

04-01

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

RED

RED

RED

RED

RED

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

BROWN

ORANGE

YELLOW

GREEN

BLUE

PURPLE

GRAY

WHITE

BLACK

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

RED

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

RED

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

RED

RED

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

BLUE

YELLOW

WHITE

BLACK

RED

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

WHITE

RED

RED

WHITE

RED

WHITE

WHITE

WHITE

WHITE

RED

WHITE

RED

WHITE

WHITE

BROWN

RED

ORANGE

YELLOW

BROWN

RED

ORANGE

YELLOW

WHITE

WHITE

WHITE

WHITE

WHITE

RED

RED

BLUE

WHITE

BLACK

RED

BLACK

BLACK

BLACK

BLACK

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

11

10

9

8

7

6

5

4

3

2

1

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

11

10

9

8

7

6

5

4

3

2

1

10

9

8

7

6

5

4

3

2

1

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

6

5

4

3

2

1

6

5

4

3

2

1

10

9

8

7

6

5

4

3

2

1

10

9

8

7

6

5

4

3

2

1

10

9
8
7
6

5
4
3
2

1

1234567

8

1234567

8

1234561234

1

2

1

212345

12345

12345

12345 12

12

12

345

678

12345

12345

1234
1234

123

12

3

123

12 12

CN205

TEST

CN12CN17

CN7

CN6

CN3

CN4

CN16

CN9

CN206

CN15

CN11

CN201

CN200

CN203

CN202 CN204

CN208

CN210

3

3

1

1

SW (LEFT)

SW (RIGHT)

THERMAL
FUSE 102

AIR FILTER (LEFT)

AIR FILTER (RIGHT)

THERMAL
FUSE 102

TM1

TM2

LOUVER U

LOUVER Z

LOUVER
(RIGHT-LEFT)

DIFFUSER

FAN MOTOR

CONNECTOR (WHITE)

CONNECTOR (WHITE)

CONNECTOR (RED)

CONNECTOR (RED)

ROOM TEMP. THERMISTOR

PIPE TEMP. THERMISTOR

RECEIVER PCB

UV-LED UNIT

W3

CONTROLLER PCB

F M

M

M

CONNECTOR PCB

INDICATOR PCB

M

M

M

M

TM4

WHITE

BLACK

RED

THERMAL
FUSE 102

TERMINAL

N

L

3

OUTDOOR UNIT

Models : AW * Z24LBC

OUTDOOR UNIT

04-02

RED
RED

BROWN
BROWN

BLUE
BLUE

BLACK
BLACK

BROWN
BROWN

BLACK

BLACK

WHITE
YELLOW
ORANGE
BLUE
BROWN
RED

BROWN
YELLOW
WHITE
BLACK

RED

RED

BLACK

GREEN
BLACK

WHITE
WHITE

BLACK

PURPLE

WHITE

YELLOW

YELLOW

BLUE

BLUE

BLACK

RED

BROWN

ORANGE

BLACK BLACK

WHITE

WHITE

RED RED

ORANGE

ORANGE

BLACK

WHITE

BROWN

RED

BROWN

RED

ORANGE

YELLOW

GREEN

BLUE

PURPLE

GRAY

BLACK

WHITE

BROWN

RED

ORANGE

YELLOW

BLACK

BLACK

WHITE

GRAY

WHITE

WHITE

109

87654

321

109

87654

321

21

109

87654

321

109

87654

321

654

321

654

321

4

321

4

321

4

321

4

321

321

321

21

21
21

7
6
5
4
3

21

21

2
1

6
5
4
3
2
1

7
6
5
4
3
2
1

6
5
4
3
2
1

3
2
1

3
2
1

2
1

2
121

212

1

2
1

2
1

212

1

2
1

CN700

CN801

CN500

CN110CN1

CN400

CN200

CN11

CN60

CN61

CN62

CN64

CN90

CN40CN42

CN303 CN301

W306

W307

W302

W301

W17

W16

TM102

TM101

W303

W

W304

V

W305

U

W8

W7

W13

W12

L2 L1

+

P

N1

N2

I O

TM600

TM601

W4

R

C

S

CN100

12

W29

W28
W25

W26

W21 W20

W9

W17

W3

W18
W2

W1

W19

WHITE

WHITE

TERMINAL

FUSE 250V 25A

123LN

POWER SOURCE

TO INDOOR UNIT

FAN MOTOR

EXPANSION VALVE

4-WAY VALVE

F M

PMV

4WV

DISCHARGE TEMP. THERMISTOR

PIPE TEMP. THERMISTOR

OUTDOOR TEMP. THERMISTOR

COMPRESSOR TEMP. THERMISTOR

HIGH PRESSURE SWITCH

CHOKE COIL

POSISTOR

COMPRESSOR

C M

CONNECTOR

CONNECTOR

CAPACITOR PCB

ACTPM

I P M PCB

POWER SUPPLY PCB

CONTROLLER PCB

( MAIN PCB )

Models : AO * Z24LBT

5 . DESCRIPTION OF EACH
CONTROL OPERATION

R410A

CEILING WALL 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.

minimum
frequency

maximum
frequency

maximum
frequency

AW * Z24LBC 21Hz 47Hz 63Hz

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 63Hz 43Hz 37Hz 27Hz
B zone 63Hz 43Hz 37Hz 27Hz
C zone 57Hz 39Hz 33Hz 23Hz

24LBC

D zone 39Hz 31Hz 27Hz 21Hz
E zone 39Hz 31Hz 27Hz 21Hz
F zone 39Hz 31Hz 27Hz 21Hz

S-Quiet

25Hz
25Hz
21Hz
21Hz
21Hz
21Hz

( Table 1 : Compressor Frequency Range )

When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency to Maximum Frequency .
The room temperature is controlled 1°C lower than the setting temperature for 40 minutes
after starting the operation.
After 40 minutes, it is controlled based on the normal setting temperature.

05-01

E zone

F zone

10°C

0°C

12°C

2°C

* 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.

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

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

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

AW * Z24LBC 21Hz 87Hz

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 87Hz 63Hz 51Hz 49Hz
B zone 87Hz 63Hz 51Hz 47Hz

24LBC

C zone 87Hz 63Hz 51Hz 43Hz

S-Quiet

47Hz
43Hz
39Hz

* 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

AW * Z24LBC 23Hz

room room
temperature temperature

compressor ON

Ts+1.5°C

Ts+0.5°C

compressor OFF

Compressor

ON

OFF

Indoor fan

Dry air flow

S-Lo

OFF

( Table 3 : Compressor frequency )

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

( Fig.4 : Indoor Fan Control )

05-03

10 30 60 180 60 180 60 10 30

(SEC)

4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the
optimum mode is automatically switched 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

Tb < Ts - 2°C

Monitoring

Cooling

(automatic dry)

Cooling

(automatic dry)

Ts+2°C Tb Ts - 2°C

Monitoring Monitoring Monitoring

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 temperature -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 )

Except S-Quiet

(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.

AW * Z24LBC

Operation mode Air flow mode Speed (rpm)

Hi 1,700

Me+ 1,610

Me 1,510

Lo 1,390

Quiet 1,260

S-Quiet

S-Quiet

S-Quiet

1,120

Cool air

prevention

850

Heating

S-Lo 480

Hi 1,500

Me 1,370

Lo 1,250

Cooling
Fan

Quiet

1,030
1,130

Dry

1,030

05-05

1,130

(3).COOLING OPERATION

Switch the airflow [AUTO], and the (Fig.6)
indoor fan motor will run according

airflow change - over ( Cooling:AUTO )

to a room temperature, as shown in

When the room

Figure 6.

temperature rises

On the other hand, if switched in
[HIGH]

[QUIET], the indoor motor

+2.5°C

will run at a constant airflow of [COOL]

operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5.

+1.5°C

+1°C

LOW mode

When the room

temperature lowers

(Room temperature) D (Setting temperature)

(4).DRY OPERATION

(5).HEATING OPERATION

Switch the airflow [AUTO], and the (Fig.7)
indoor fan motor will run according

airflow change - over ( Heating:AUTO)

to a room temperature, as shown in

When the room

Figure 7. temperature rises
On the other hand, if switched

LOW mode

[HIGH]

[QUIET], the indoor motor -1°C

will run at a constant airflow of [HEAT]

-1.5°C

operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5.

-2°C

-2.5°C

MED + mode

When the room

temperature lowers

(Room temperature) D (Setting temperature)

(6).COOL AIR PREVENTION CONTROL (Heating mode)

Indoor heat exchanger Indoor heat exchanger
temperature temperature

47°C

Hi

40°C

Me+

37°C

Lo

Cool air prevention

30°C

S-Lo

Refer to the table 4.
Durring the dry mode operation, the fan speed
setting can not be changed.

The maximum value of the indoor fan speed is set as shown in Figure 8, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.

(Fig.8 : Cool Air Prevention Control)

05-06

40°C

28°C

32°C

34°C

HIGH mode

MED mode

+2°C

MED mode

6. OUTDOOR FAN CONTROL

(1). Fan speed

Zone

AW * Z24LBC

Heating

AW * Z24LBC

900/780/700/550/450rpm

Table 6 : Fan speed (Cooling, Dry)

Table 7 : Fan speed (Heating)

The outdoor fan speed is changed in the range of the speed shown in the above table,
based on the frequency of the compressor.
(When the compressor frequency increases, the outdoor fan speed is also changed to
higher speed. If the compressor frequency decreases, the outdoor fan speed is changed
to the lower speed as well.)
After starting up the outdoor fan, it operates with the following speed for initial 20 seconds.

*

Table 8 : Fan speed when starting up Outdoor fan

*

After operating the defrost control function on heating mode, its speed becomes 1,000rpm
regardless of the compressor frequency.
However, it returns to the normal speed control when the defrosting operation does not function
for 240 minutes after releasing the defrost operation or when the outdoor temperature sensor
detection value becomes higher than 5 C.

05-07

A to D

Cooling

850/780/700/500rpm

500/250/200rpm

320/250/200rpm

Dry

550/450rpm

500/250/200rpm

320/250/200rpm

Outdoor temperature

AW * Z24LBC

Speed

500rpm

200rpm

Over than 12 C

Less than 12 C

E

F

Refer to Fig.1

7. LOUVER CONTROL

05-08

(1). 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 Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically
becomes

.

(Function Range)

(Fig 9: Air Direction Range)

(Operation Range)

When the indoor control interface device receives a control signal light from the remote control,
it will actuate, the step motor according to the control signal, and set the louver to each position.
In addition, if the air conditioner is stopped, vertical louver will be closed automatically.

Vertical Air Direction Adjustment

6

Each time the button is pressed, the air direction range will change as follow:

(Function Range)

Horizontal Air Direction Adjustment

7

1

8

778

8

5

6

Cooling mode / Dry mode / Fan mode( )
Heating mode / Fan mode(

)

(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 at S-Lo or Stop mode, the swinging operation is interrupted
and it stops at either right end or left end.

14

1

4

5

8

88

To select Vertical Airflow Swing Operation

To select Horizontal Airflow Swing Operation

When the swing signal is received from the remote controller, the horizontal louver starts to swing.

All mode :

(Swinging Range)

3

1

When the indoor fan is S-Lo or Stop mode, the swinging operation is interrupted
and it stops at either upper end or bottom end.

To select Vertical and Horizontal Airflow Swing Operation

When the horizontal swing signal is input from remote control, the combination of the vertical
and horizontal swing operation is performed.

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

AW * Z24LBC 21Hz 75Hz 21Hz 87Hz 23Hz

AW * Z24LBC 40Hz 59Hz

(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

(Frequency)

(Time)

Frequency

Frequency

Time Time

Frequency

Frequency

05-09

AW * Z24LBC

60sec 40sec

AW * Z24LBC

9. TIMER OPEARTION CONTROL

(1). OPEARTION FREQUENCY RANGE

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

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

AW * Z24LBC

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

Operation mode

Stop mode

Set time of timer

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

Operation mode

Stop mode

Set time of timer

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

Operation mode

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

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

(Table 9 : Timer Setting)

(2). PROGRAM TIMER

Stop mode

Stop mode

Stop mode

Operation mode

Operation mode

Set time

Set time Set time Set time

05-10

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

Ts

+1°C

+2°C

Set

60min

In the heating operation mode

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

-4°C

-3°C

-2°C

-1°C

Set

30min

30min

30min

05-11

10. ELECTRONIC EXPANSION VALVE CONTROL

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

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 3 minutes 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 3 minutes 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

AW * Z24LBC

Pulse range

40 480 pulse

(1) Pulse range of EEV

(2) The EEV is set up at 480 pulses when the compressor is stopped.

(3) Intialization (Input of 528 pulses toward closing direction) is operated under the
following condition.

* When the power is turned on.
* 3 hours has passed since the last initialization, and 3 minutes has passed after
the compressor stop.
(If 12 hours has passed since the last initialization, the compressor is compulsorily
stopped.)

15. MANUAL AUTO OPERATION (Indoor unit body operation)

If MANUAL AUTO Button is set (Push a MANUAL AUTO button for 3~10 seconds), the operation

If the remote control is lost or battery power dissipated, this function will work without the remote
control.

is controlled as shown in Table 10.

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.

Filter Clean is operated after a coil dry operation end.

FIlter Clean function performs disinfection and deodorization of a filter with UV lamp during filter
movement.
Unit is stopped after Filter Clean operation.

AW * Z24LBC

AW * Z24LBC

1100rpm 29Hz

(Table 10)

(No timer setting available)

17. COMPRESSOR PREHEATING

(Table 11 : Preheating Operation / Release Temperature)

Temperature

Temperature

5°C

7°C

18. COIL DRY AND CLEAN OPERATION CONTROL

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

(Table 12 : COIL-DRY Operating Functions)

Indoor Fan Speed

Compressor
Frequency

Louver
Position

Main Unit
Indication

COIL-DRY indication : ON
Other indication : OFF

05-13

Forced cooling operation

Cooling

16. FORCED COOLING OPERATION

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

COIL DRY OPERATION CONTROL

Hi

Horizontal
OFF

Room Temp is not controlled

Manual auto operation

-

19. UV FILTER CLEANING CONTROL

1. SETTING METHOD

(1) Manual filter cleaning function

- Press [FILTER] button on remote controller to start filter cleaning.

(2) Automatic cleaning function

- Filter maintenance interval can be set at either 50 hours or 100 hours
with the remote controller ([SET TIME] button is kept pressed - refer to
the operation manual).

- When the accumulated operating time reached to the set up interval
time, the filter cleaning function automatically starts at the stop mode.

2. MAIN UNIT INDICATION

* Type of [MAINTENANCE SIGN] lamp (Red) indications on main unit.

- During the filter cleaning function
[MAINTENANCE SIGN] lamp (Red) is ON.
(It lights up only when the filter is functioning. Upon filter
function is completed, it goes off.)

- When the filter cleaning function is abnormal
[MAINTENANCE SIGN] lamp (Red) blinks (1 sec. ON / 1 sec. OFF)

- Notification of Dust box maintenance
[MAINTENANCE SIGN] lamp (Red) will light up.
It notifies the timing of Dust box maintenance. It lights up after 2,000
or 4,000 hours of operation by setting up with the auto cleaning
function time.
The red lamp will keep lighting until resetting the accumulated time,
regardless of air conditioner's operating mode.

3. REMOTE CONTROLLER CONDITION

The LCD indication does not change with [FILTER] button.

4. LIMIT SWITCH CONDITION FOR THE FILTER LOCATION DETECTION.

- Limit switch ON - On filter function, the filter is stopped on the way.

- Limit switch OFF - The filter is correctly installed, or The filter is not installed.

05-14

MAINTENANCE SIGN

TIMER OPERATION HI-POWER

SUPER QUIET

5. OPERATING FUNCTION

- UV filter cleaning function
UV LED is turned on during the filter cleaning operation to remove bacteria or to deodorize.
< Condition to light up UV-LED >
UV-LED is lighted up after 5 seconds of starting the filter cleaning operation.
If error is occurred during the filter operation, it is turned off.

6. PROTECTING FUNCTIONS

(1) Automatic filter retracting function
Under following conditions, the filter moves toward retracting direction until the limit switch
turns OFF.

- The limit switch is kept ON for 2 seconds when the power is turned on.

- The limit switch turns ON from OFF and it is kept ON for 2 seconds when the air conditioner
is in operating or stop mode.
> If the air conditioner is in operating mode, it does not stop the operation and functions the
filter.

(2) Filter mounting error protection
(a) Filter come out mounting error
(b) Filter retract mounting error
If above error occurs, it is memorized in EEPROM (Error history).
Error is indicated with blinking [MAINTENANCE SIGN] lamp (Red) for 1 sec. ON / 1 sec. OFF.

(3) Filter cleaning forced stop function when Dust box maintenance notification is in operation.
* When [MAINTENANCE SIGN] LED (Red) is ON, following functions do not work until reset
button will be pressed.

- Auto cleaning / Manual filter cleaning function

- Filter auto retract function

- Forced filter cleaning function, Off timer operating time auto cleaning.
* This protecting function can be released by pressing [MAINTENANCE/MANUAL AUTO]
button.

(4) Filter cleaning stepping motor temperature rise protection
Filter cleaning can be operated continuously up to 3 times.
(If it is operated 3 times continuously, it stops filter cleaning function for 3 minutes.)

(5) Forced filter cleaning protection for the continuous operation
When the operation time of air conditioner reaches to 200 hours, the operation is temporarily
stopped, and the filter cleaning is performed. Upon completion of the filter cleaning, it resumes
operation.

(6) Auto cleaning function protection for OFF Timer operating time
If the filter cleaning does not operate after 100 hours of air conditioner operating time and it is
reached to 150 hours, the filter cleaning function starts to operate at the time of stopping
operation by OFF Timer time up

05-15

20. 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)

AW * Z24LBC

AW * Z24LBC

AW * Z24LBC

1 time defrosting
after starting
operation

ST

Defrosting after 2
time upon starting
operation

ND

Compressor operating time

Less than 17 minutes 17 to 60 minutes

60 minutes to 4 hours

After 4 hours

Does not operate

- 9 C

- 5 C

- 3 C

Less than 35 minutes

35 minutes to
4 hours

Does not operate

Compressor operating time

After 4 hours

- 3 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 13 C or
Compressor operation time has passed 15 minutes.

05-16

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 17 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 13°C

or
Compressor ON time:
Over 15 minutes

Defrost end

Below -5°C

Below -3°C

Below -6°C

Below -3°C

05-17

21. 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.

AW * Z24LBC

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 13°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 13°C or
Compressor operation time has passed 15 minutes.

7 sec ON / 2 sec OFF

05-18

22. VARIOUS PROTECTIONS

(1). DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

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

AW * Z24LBC 104°C 101°C 110°C

AW * Z24LBC

AW * Z24LBC

7.0A / 6.5A

9.5A / 9.0A

11.5A /11.0A

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

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

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

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

Temperature

Temperature

Temperature

(2). CURRENT RELEASE CONTROL

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

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

[ Cooling / Dry ]

OT : Outdoor Temperature

OT : Outdoor Temperature

05-19

10.5A / 10.0A

13.0A / 12.5A

15.0A / 14.5A

17.0A / 16.5A

OT (Control / Release)

17°C

12°C

5°C

46°C

40°C

OT (Control / Release)

[ Heating ]

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

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

A-D
E,F

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

TemperatureTemperature

4°C
4°C

7°C
13°C

(4). COOLING PRESSURE OVERRISE PROTECTION

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

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

AW * Z24LBC 67°C

Temperature

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

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

05-20

[AW * Z24LBC ]

59Hz or greater

57Hz

31

57Hz

23 29Hz 21Hz

21Hz

OFF

Indoor heat exchange
temperature

[ Control System ]

Temperature

Temperature

Refer to below

Temperature

Temperature

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

It returns to the normal operation

Compressor Operation

Frequency down every 120 sec

AW * Z24LBC 55°C

Temp

Temp Temp Temp

53°C 52°C 50°C

Zone

Refer to Fig.1

05-21

(6). COMPRESSOR TEMPERATURE PROTECTION

When the compressor temperature sensor detects higher than Temperature in the table below,
the compressor is stopped. The protection is released when the compressor temperature sensor
detects Temperature in the table below after 3 minutes of compressor stop.

(Table 22 :Operating Temperature of Compressor Protection)

Temperature

Temperature

AW * Z24LBC

(7). HIGH PRESSURE PROTECTION

When the pressure switch becomes OFF (open : higher than 609.2 psi /4.2 Mpa), the compressor is
stopped. It is released when the pressure switch becomes ON (close : lower than 464.1 psi/3.2 Mpa)
after 3 minutes of compressor stop.

120 C

80 C

6 . REFRIGERANT CAUTION -R410A-

R410A

CEILINGWALL type

INVERTER

1. R410A TOOLS

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

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

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

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

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

Electronic balance for refrigerant

charging . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Fig.4-4)

Electronic balance is recommended as in the case of
R410A.

Vacuum pump with adapter to prevent

reverse flow . . . . . . . . . . . . . . . . . . . . . . . .

(Fig.4-5)

Conventional pump can be used.

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

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

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

Exclusive for HFC

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

Brown paint as designated by the ARI, USA

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

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

Refrigerant recovering

equipment (Collector) . . . . . . . . . . . . . .

(Fig.4-11)

The type which can be used for any refrigerant is available

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

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

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

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

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

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

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

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

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

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

TOOLS AND EQUIPMENT (R410A)

Gauge Manifold

R410A

R22, R407C

High
pressure
gauge

Compond
gauge

Port size

-0.1 5.3
Mpa

-0.1 3.8
Mpa

1/2UNF
5/16"

-0.1 3.5
Mpa

-0.1 1.7
Mpa

7/16UNF
1/4"

*

1

Charge hose

R410A

R22, R407C

Normal
pressure

Port size

5.1 Mpa

27.4 Mpa

1/2UNF

3.4 Mpa

17.2 Mpa

7/16UNF

*

2

Breaking
pressure

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

Gas charging

Vacuuming

Piping work

Pressure control and
Circuit switching

Charge hose
Fig.4-2

Outdoor unit

Electronic charging
scale Fig.4-4

Vacuum pump Fig.4-5

Thermistor vacuum gauge Fig.4-15

Vacuum
Valve Fig.4-16

Safety charger Fig.4-13

Control Valve
Fig.4-14

Vacuum holder Fig.4-6

Leakage tester Fig.4-7

Cleaner Fig.4-8

Collector Fig.4-11

Nitrogen Cylinder

Fig.4-12

Torque wrench
Fig.4-10

Flare tool
Fig.4-9

Gauge manifold
Fig.4-1

Fig.4-3

Refrigerant cylinder

Vacuum control

Low pressure

High pressure

side

side

2. PRECAUTION FOR INSTALLATION

06-02

Precaution for installation

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

Flare and flare nuts

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

Refrigerant

R410A

R22
/R407C

R410A R410A

A 9.1 9.0 13.2 13.0 16.6

16.2

B 13 12 20 15 13 20

C 12 11 16 12.5 19 16

Nut width 17 22 26 24

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

Do not use existing (for R22) pipes

•

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

•

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

3/8” (15.88mm)

R410A

22

29

19.7

25

R22
/R407C

R22
/R407C

R22
/R407C

19.4

23
20

27

3/4” (19.05mm)

R410A

24

36

24

29

R22
/R407C

23.7

29

24

Material

Nominal diameter

(in)

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

6.35 9.52 12.70 15.88 19.05 22.22 28.58 31.75 38.1034.9225.40

Outside diameter

(mm)

Wall thickness

(mm)

0.8 0.8 0.8 1.0 1.2 1.0 1.0 1.1 1.31.21.0

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

>
=

2

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

>
=

2

JIS H3300-C1220T-H or equivalent

2)

COPPER

JIS H3300-C1220T-O or equivalent

1)

COPPER

3)

Pipe diameter, recommended material and wall thickness

A

C

B

Be careful not to mix moisture and

contamination into the pipe

Moisture and contamination

in the pipe is a cause of
trouble.

Air purge

Always use a

vacuum pump

to purge air.

Refrigerant charge

Do it always from the liquid phase
side.

Don't charge from the gas phase side.

Compressor oil is changed

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

contamination.

Don't mix new synthetic oil and mineral oil.

It may cause trouble.

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

06-03

3. PRECAUTION FOR SERVICING

Feature 1 Refrigerant oil is different from before.

Refrigerant oil for
New Refrigerant

Synthetic oil

Ether

Esther

Different point from
previous one

Previously it was
mineral oil.

Absorbent character
is high.

Contamination occurs
when mixed withe other
kind of oil.

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

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

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

Precaution on Tools

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

R410A

High Pressure

Different point from
previous one

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

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

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

Precaution on Tools

R410A R22

1.6 times of R22.

JIS standard of flare
process It became lager

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

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

06-04

4. NEW REFRIGERANT R410A

What is HFC ?

Phase-out schedule of HCFC

according to Montreal protocol

1996 20102000 2004 2015 2020 2030

60

40

20

100

(Year)

(%)

80

(HCFC consumption of 1989) +

(CFC consumption of 1989) x 2.8%

65%

35%

10%

0.5%

started control

only service use

total abolition

100% =

0

*

06-05

Ozone Layer depleting mechanism

CFC

CFCl

2

Cl Ozone

(O

3

)

O

2

ClO

Cl

sunbeam

What is CFC and HCFC?

CFC : Chloro-Fluoro-Carbon

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

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

HCFC : Hydro-Chloro-Fluoro-Carbon

For example : R22 (for air-conditioner)

R134a (for Car air conditioner)

HFC

3 : Hydro-Fluoro-Carbon

R407C (for air conditioner)

Refrigerant characteristics

R22

Composition

(wt%)

R22

(100)

Boiling Point

- 40.8

Behavior ---

Pressure at 54.5

C

(kPa)

2,151

Temperature Glide

(deg)

0

ODP 0.055

R407C

R32/R125/R134a

(23/25/52)

- 43.6

zeotrope

2,262

5.4

0

R410A

R32/R125

(50/50)

- 51.4

near azeotrope

3,406

0.11

0

06-06

Summary of R407C and R410A characteristics

Pressure (Mpa) Temp ( C)

2.20 37.9

2.25 38.7

2.30 39.6

2.35 40.5

2.40 41.3

2.45 42.1

2.55 43.8

2.60 44.6

2.65 45.3

2.70 46.1

2.75 46.8

2.80 47.6

2.85 48.3

2.90 49.0

2.95 49.8

3.00 50.5

3.05 51.2

3.10 51.9

3.15 52.6

3.20 53.2

3.25 53.9

3.30 54.6

3.35 55.3

3.40 55.9

3.45 56.5

3.50 57.1

2.55 57.8

3.60 58.4

3.65 59.0

3.70 59.6

3.75 60.2

3.80 60.8

3.85 61.4

3.90 52.0

3.95 62.5

4.00 63.1

4.05 63.6

4.10 64.2

4.15 64.8

Temp ( C) Pressure (Mpa)

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

Desighed pressure of R410A refrigerant

< Pressure Temp >

Relation between R410A condensing temperature and saturated pressure.

< Temp Pressure >

Advantage

Disadvantage

Suitable for

R410A

higher system

performance

Near-Azeotropic

refrigerant

1.6 times higher

(difficult to design against

pressure resistance)

Small Air-Conditioners

pressure than R22

R407C

similar pressure as R22

(possible to design

large equipment)

Zeotropic refrigerant

(handle with care)

Large Air-Conditioners

*

05-07

OIL

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

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

fully than the conventional lubricating oils.

CAUTION

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

2, 3-WAY VALVE

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

CAUTION

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

CAUTION

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

COMPRESSOR

• Use better grade of material for sliding parts for securing good lubrication of sliding part as HFC

refrigerant does not contain chloride.

• Review insulating materials

• Increase pressure resistance strength

CAUTION

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

HEAT EXCHANGER

• Review the water,contaminants controlling level

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

CAUTION

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

4-WAY VALVE

• Review materials

5. DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS

06-08

7 . TROUBLE SHOOTING

R410A

CEILING WALL 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
* Refrigeration cycle diagnosis

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

[Check Point]

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

(4) Check if each connector is inserted securely.

[Checking Flow Chart]

YES (AC230V)

YES (AC230V)

YES (AC280~420V)

YES (DC7V)

(IC5, T1 or IC8,11 defective)

YES (DC15V)

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

Controller PCB defective

NO

NO

NO

NO

NO

NO

NO

(D1, R1 defective)

(IC5, T1, IC20 defective)

(F1, VA1 defective)

07-01

Does not connected cable do wrong wiring?(3)

YES (C12:DC20, C13:DC13.5V 1V)

Is AC input voltage from AC outlet normal ?

Fault of an input power supply.

Is AC voltage between VA 1 normal?

Switching power circuit

Is DC voltage between terminal of C4 normal?

Switching power circuit

Switching power circuit

Is DC voltage between terminals of C12 & C13 normal?

Is DC voltage between terminals 3 & 4 of IC19 normal?

Is DC voltage between terminals of C15 normal?

IC3 defective

IC17 defective

IC19 defective

Is DC voltage between terminals of C66 normal?

YES (AC230V)

NO

Is AC voltage between W1 and 4pin of K1 normal?

Temp fuse defective

SELF-DIAGNOSIS FUNCTION

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

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

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

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

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

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

during

[3 minutes ST].

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

[Lamp display]

3 minutes delay

Turn off Operating

Error Indication Normal indication after

3min.ST

Indication

AC Plug ON Start operation Input TEST signal

How to erase Memory

(1)

(Indoor unit buzzer beeps 3 seconds.)

07-02

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

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Error

(Protection)

Diagnosis Method

0.5 sec

2 times

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

seconds.

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

>Outdoor unit stops.

OFF

07-03

Serial forward transfer error

during the operation

Serial forward transfer error

at starting up operation

Serial reverse transfer error

during the operation

Serial reverse transfer error

at starting up operation

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

>Permanent stop after 30 seconds.

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor

unit terminals and diagnose the defective location.

(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor

unit terminals and diagnose the defective location.

(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor

unit terminals and diagnose the defective location.

(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

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

[Diagnosis Point]

Check the indoor /outdoor cable connection (in order). If the cable wiring is not abnormal, measure the voltage of the outdoor

unit terminals and diagnose the defective location.

(Refer to the after mentioned [Serial Signal Diagnosis] for the voltage measuring method and diagnosis method.)

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

operate.

[Diagnosis Point]

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

Controller PCB defective.

The detection value of the indoor heat exchanger thermistor is either open or shoted when the power is ON. > Remote control dose

not operate.

[Diagnosis Point]

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

Controller PCB defective.

Room temperature therm-

istor defective

Indoor heat exchanger

thermistor error

0.5 sec

3 times

0.5 sec

4 times

0.5 sec

5 times

0.5 sec

2 times

0.5 sec

3 times

0.5 sec

2 times

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Error

(Protection)

Diagnosis Method

0.5 sec

2 times

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

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

The detection value of the outdoor temperature thermistor is either open or shorted.

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

0.5 sec

3 times

07-04

Forced auto switch error

Outdoor temperature ther-

mistor error

Outdoor heat exchanger

thermistor error

Discharge thermistor error

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

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

[Diagnosis Point]

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

Controller PCB defective.

[Diagnosis Point]

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

Controller PCB defective.

[Diagnosis Point]

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

Controller PCB defective.

Forced auto switch becomes ON for 30 consecutive seconds.

> It indicates the error but the operation continues.

[Diagnosis Point]

Check if forced auto switch is kept pressed.

Forced auto switch defective.

Controller PCB defective.

After 2 minutes 20 seconds of stopping operation, the signal from outdoor unit is received even though the main relay is OFF.

> Main relay OFF continues (outdoor unit OFF command)

[Diagnosis Point]

Main relay defective

Controller PCB defective.

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

> Permanent stop.

[Diagnosis Point]

Controller PCB defective.

Main relay error

Power supply frequency

detection error

0.5 sec

3 times

0.5 sec

4 times

0.5 sec

2 times

0.5 sec

3 times

0.5 sec

4 times

0.5 sec

4 times

0.5 sec

8 times

Compressor Temperature

Thermistor Error

The detection value of the compressor 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.

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Error

(Protection)

Diagnosis Method

Abnormal current value of IPM is detected.

> Permanent stop.

07-05

CT error

IPM protection

[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").

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

> permanent stop.

[Diagnosis Point]

Check if CT wire is open.

Controller PCB defective.

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")

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

> Permanent stop.

[Diagnosis Point]

Fan motor connector loose/ defective contact.

Fan motor defective.

Controller PCB defective.

Compressor location error

Outdoor fan error

(DC motor)

0.5 sec

2 times

0.5 sec

3 times

0.5 sec

5 times

0.5 sec

6 times

0.5 sec

5 times

Self - diagnosis function and Checking points

Error Indication

Operation

(RED)

Timer

(GREEN)

Error

(Protection)

Diagnosis Method

0.5 sec

2 times

The indoor fan speed is 1/3 of the target frequency after 56 seconds from starting operation or from the time the fan mode was

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

The discharge temperature error is activated.

> Permanent stop.

0.5 sec

6 times

07-06

Excessive high pressure

protection on cooling

Discharge temperature

error

Indoor fan speed error

Indoor fan lock error

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

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

[Diagnosis Point]

Fan motor connector loose /defective contact.

Fan motor defective

Controller PCB defective.

[Diagnosis Point]

Fan motor connector loose /defective contact.

Fan motor defective

Controller PCB defective.

[Diagnosis Point]

Check if 2-way valve or 3-way valve is left open.

Heat radiation is blocked (Inlet /outlet).

Check if outdoor fan is defective (does not rotate).

Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle diagnosis").

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").

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

> Permanent stop.

Active Filter error or instantaneous cut off error is detected.

> Compressor, Outdoor Fan : OFF.

[Diagnosis Point]

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

PFC circuit error

0.5 sec

3 times

0.5 sec

2 times

0.5 sec

3 times

0.5 sec

2 times

Active Filter error0.5 sec

3 times

0.5 sec

7 times

[Diagnosis Point]

<CAUTION> Even if the unit is normal, it may detect error depending on the power supply voltage condition.

Controller PCB defective (Refer to after mentioned "Active Filter diagnosis")

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

0.5 sec

8 times

0.5 sec

5 times

Pressure Switch Error

If the pressure switch is open for 10 sec. when the power is turned on

> Compressor, Outdoor Fan : OFF

When it becomes normal after 10 sec. passed, the openretion is resumed based

on serial forward transfor signal.

[Diagnosis Point]

Check interruption (Air intake / outlet)

Check outdoor fan operation (does not rotate)

Check refrigerant cycle (Refer to "Refrigerant cycle diagnosis" which is described in the later chapter)

Serial Signal Receiving Error

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

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

measured with a meter.

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

[Check Procedure]

[Indoor Unit Check]

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

NO

YES

YES

07-07

[Outdoor Unit Check]

Indoor unit control unit is normal.

Check outdoor unit control unit.

Does voltage AC220 to 230V appear between NO
terminal L and N of indoor unit terminal base?

Check cable wiring of terminal base.

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

Outdoor unit controller PCB board failure.

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

Indoor unit controller PCB IC19 failure.

Does voltage DC350 to 415V appear at NO
DC voltage terminal?

Check broken fuse, wiring connection.

Does voltage AC220 to 230V appear between
terminal N and L of outdoor unit terminal base?

Check power supply connection.

NO

NO

NO

NO

YES

YES

YES

YES

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

IPM Protection

[Checking Points]

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

[Cause]

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]

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

Trouble Shooting of Refrigerant Cycle

[Diagnosis Table for Defective Component]

: Item of most possible cause

IPM Protection

Compressor

Location error

Discharge

Temperature Error

Cooling High

Pressure

Protection

Refrigerant leak

Compressor failure(*)

EEV failure (*)

Thermistor failure (*)

(*) Trouble Shooting Method

(1) Checking method of the compressor failure

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

Compressor Failure

NORMAL

AW * Z24LBC Compressor Case Temperature at 25°C: 1.086 ohm

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

(2) Checking method of EEV failure

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

(3) Checking method of Thermistor

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

07-10

8 . APPENDING DATA

R410A

CEILING WALL type

INVERTER

1. Jumper setting of Indoor unit and Outdoor unit

2. Outdoor unit Pressure Value and Total Electric Current Curve

3. Capacity/Input Data

4. Thermistor Resistance Values

JP (Jumper) Setting

[Indoor Unit]

AW * Z24LBC

- 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

JM2(JP)

J1

Code A (Default)
Code B

- Auto Restart

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

Indoor Unit

JM1 (JP)

With Auto Restart function
(Default)
Without Auto Restart
function

[Outdoor Unit]

AO * Z24LBT

JP

JM2 JM903 JM092 JM901

Normal Preheat

24LBT

Higher Preheat

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

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

08-01

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

Model Name : AW * Z24LBC

[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

m

ethod

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

AW * Z24LBC

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

AW * Z24LBC

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.

08-02

[50Hz-230V]

0.6

0.7

0.8

0.9

1.0

1.1

18 20 22 24 26 28 30 32

In/o ut doo r am bie n t tem pa ra t ure [ C ]

Low-pressure of outdoor unit [MPa]

RH50%
RH60%
RH70%

[50Hz-230V]

5.0

5.2

5.4

5.6

5.8

6.0

6.2

6.4

6.6

6.8

7.0

18 20 22 24 26 28 30 32

In/outdoor ambient temparature [ C]

Outdoor total electric current [A]

RH50%
RH60%
RH70%

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

Model Name : AW * Z24LBC

[Condition]
Ambient

temperatur

e

Indoor 15 - 23degC, Outdoor 2 - 12degC

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

50Hz - 230V

Operation

con

diti

on

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

AW * Z24LBC

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

AW * Z24LBC

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

length

08-03

[50Hz-230V]

2.7

2.8

2.9

3.0

3.1

3.2

3.3

02468101214

outdoor ambient temparature[ C]

High-pressure of outdoor unit [MPa]

15[ C]
20[ C]
23[ C]

[50Hz-230V]

0 2 4 6 8 10 12 14

outdoor ambient temparature[ C]

Indoor/Outdoor total electric current [A]

15[ C]
20[ C]
23[ C]

Indoor ambient Temp.

Indoor ambient Temp.

3.4

11.0

10.5

10.0

9.5

11.5

12.0

9.0

08-04

AW * Z24LBC

Capacity/Input data

Heating

<Capacity>

< Input >

(1/2)

*Defrosting operation is performed when temperature is less than 5.5 degrees C.
Frost appears on an outdoor unit heat exchanger at 5.5 or less degrees C.
*Solid line:Integral capacity/Input containing the defrosting cycle.
*Dotted line:Capacity/Input which does not contain the defrosting cycle.

Under construction

Under construction

08-05

Cooling

< Capacity >

< Input >

*Both capacity and input change largely when temperature is 10 or less degrees C, as outdoor fan speed
is decreased due to low ambient temperature cooling control.
*Both capacity and input change more largely at less than 0 degrees C of ambient temperature as
outdoor fan speed is decreased further.

Under construction

Under construction

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

08-06

9 . REPLACEMENT PARTS

R410A

CEILING WALL type

INVERTER

REPLACEMENT PARTS

09-01

Models : AW * Z24LBC

REPLACEMENT PARTS

09-02

Models : AW * Z24LBC

REPLACEMENT PARTS

09-03

Models : AW * Z24LBC

REPLACEMENT PARTS

09-04

Models : AO * Z24LBT

REPLACEMENT PARTS

09-05

Models : AO * Z24LBT

REPLACEMENT PARTS

09-06

PROCESS

Install PWB ASSY

REGULATIONS
A euphotic part board and a connector are pulled out from a hole.
When caught, don't pull out forcibly.
Like a fig.2~4 CONNECTOR PWB through the hole A, and slide PWB ASSY,
and set PWB ASSY by the ditches.
Pay attention PWB ASSY must be in the ditch C. The run ashore is NG
When insert PWB ASSY to CONTROL COVER , take care not to damage its back.
Moreover, the thing which it is careful of not to catch the test connector of CN3

CONTROL COVER

Hole A

fig.1

fig.2

Ditch A

Ditch C

Ditch B

fig.3

fig.4

Ditch D

Warn against

catching UV harness

in the case of

substrate

insertion.

CN3

REPLACEMENT PARTS

09-07

PROCESS Attachment of a remote euphotic case Assemble

Case (euphotic)

Fig.1

Fig.3

REGULATIONS

The connector side of a euphotic board Is inserted under a hook like Fig.1, and it fixes.

Don't push a photograph amplifier capacitor with a finger.

The lid of a euphotic case is closed.

It is euphotic case attaches to the position of Fig. 3.

It is made not to put harness.

hook A

Fig.2

photograph amplifier capacitor

REPLACEMENT PARTS

09-08

fig.4

Fig.5

Attach a euphotic case in a substrate lid like Fig.

Unite the slot of a euphotic case with the

slot of a sulid.

Take about harness, as shown in a figure.

Fig.4

Fig.6

slot A

Euphotic harness is fixed together

with a lead (display)

REPLACEMENT PARTS

09-09

PROCESS Installation of an electrical control unit

1

1

2
3

3

4
5
6
7
8

8

8

9

10

Unit
Electrical Control unit

Cover
Binder
Tape (L=60mm)
Screw

Screw
EMI Filter

Binder

spring

2

A

B

C

REPLACEMENT PARTS

09-10

Rib

Hook is the
inner side of
the rib of
casing screw
boss.

NG

The rib of electrical
box should insert
in to the slot on the
casing.

C

Casing

Casing rib

Evaporator holder
R rib

2

REPLACEMENT PARTS

09-11

D

D

D - D

Sensor case

5~10mm (Distance from heat exchanger end)

Relay connector

- Connect UV unit lead to relay connector.

UV unit lead

Instllation of UV unit connector - sensor case

Sensor case

3+/-0.5

1

2

REPLACEMENT PARTS

09-12

Wirering of ground lead, UV unit lead, and room temperature thermistor lead.

Hold a UV unit lead and Pipe thermistor lead with ground lead.

6

Lead connection details

Screw

6

Evaporator

Grounding terminal

Ground wire

UV unit lead

Room temperature
thermistor lead

Heat exchange
cover

10mm over

Standard

- Each lead wires like an upper figure

REPLACEMENT PARTS

09-13

Wiring of a piping thermistor lead

Don't slack each lead in the heat exchanger cover upper part.

E

F

G - G

F

GG

E

Spring

Remainder of each lead (UV unit, room temperature,
piping thermistor lead) is put in between a heat
exchanger cover and an electrical control unit,
as shown in the above figure.

Do not touch each lead and the spring.

Piping thermistor

Piping thermistor

Transparent tube

REPLACEMENT PARTS

09-14

Installation of a connector for louver board

Vertical louver stepping motor

wire with a connector

Stepping motor for diffuser

Casing

Electronic equipment lid rib

Electronic equipment box

The connector for louver is between an electronic equipment lid rib
and an electronic equipment box.

Don't protrude a lead from an electronic equipment lid rib.

REPLACEMENT PARTS

09-15

Installation of relay PCB connector

(Relay PCB lead)

Binder installation range

(Bind a relay PCB lead together.)

Electrical control
unit side relay lead

H

2

4

4

(Tighten a relay board lead
and casing together.)

Relay board lead should let between the casing ribs pass,
as shown in the above figure.
Do not protrude from lib .

Installation location

OK

OK NG

Binder

4

Binder

Relay board lead

Relay board lead

4

H

Relay connector does not
get on casing.

Lead does not get on
the screw boss.

REPLACEMENT PARTS

09-16

Installation of relay PCB connector

J

J

10~15mm

0~5mm

Slack relay board lead on the left of a tape.

J - J

Tape is not slacked.

Motor case slot

Stepping motor

Relay PCB lead

Motor case

5

5

Tape

REPLACEMENT PARTS

09-17

Installation of fan motor connector

Fan motor lead (red)

Fan motor lead (red) is inserted
and locked with EMI filter.

Binder passes in the hole of an
EMI filter.
Four fan motor leads are fastened
together.

pass the back

OK NG

K

K

10

9

REPLACEMENT PARTS

09-18

PROCESS

Twist 2 times or more.

Fig.1

W16 RED(TR PWB ASSY)
WIRE WITH TERMINAL

W17 BLACK(TR PWB ASSY)
WIRE WITH TERMINAL

+RED

-BLACK

Connect WIRE WITH TERMINAL
(TR PWB ASSY), ACTPM

REGULATIONS

As shown in Fig.1, connect wires.

A right picture shows the example of two times of the twist.

REPLACEMENT PARTS

09-19

PROCESS

Fig.1

WIRE WITH CONNECTOR

WIRE WITH CONNECTOR

WIRE WITH CONNECTOR

WIRE WITH CONNECTOR must
draw around the under of
WIRE WITH TERMINAL

Install the connector surely until
the lock sound is heard.

W303 BLACK,W304 WHITE,W305 RED
(TR PWB ASSY)
WIRE WITH CONNECTOR must draw
around on W301 YELLOW W302 BLUE
(TR PWB ASSY)
WIRE WITH CONNECTOR.

Assemble wires (TR PWB ASSY)

REGULATIONS

As shown in Fig.1, assemble wires to TR PWB ASSY.

Install the connector surely until the lock sound is heard.

WIRE WITH CONNECTOR
WIRE WITH CONNECTOR
WIRE WITH CONNECTOR

1

1

2

2

2

3

3

REPLACEMENT PARTS

09-20

PROCESS

Fig.2

EMI FILTER

BINDER M

EMI FILTER

BINDER M

80+/-10mm

Fig.1

Certainly fix EMI FILTER
to wires by BINDER.

W303 BLACK,W304 WHITE,W305 RED
(TR PWB ASSY)
WIRE WITH CONNECTOR

W303 BLACK,W304 WHITE,W305 RED
(TR PWB ASSY)
WIRE WITH CONNECTOR

EMI FILTER RFC 10 must pass

W303 BLACK, W304 WHITE,

W305 RED(TR PWB ASSY).

Fig.2

Assemble EMI FILTER (TR PWB ASSY)

REGULATIONS

As shown in fig.1, assemble EMI FILTER.

As shown in fig.2, certainly fix EMI FILTER to wires by BINDER.

EMI FILTER
BINDER M

1

1

1

1

2

2

2

REPLACEMENT PARTS

09-21

PROCESS

Fig.1

WIRE BLACK (FUSE HOLDER)
WIRE WITH TERMINAL

W2 WHITE (FILTER PWB)
WIRE WITH TERMINAL

W2 WHITE(FILTER PWB) and

WIRE BLACK(FUSE HOLDER)

twist 3 times from twice

Assemble EMI FILTER (TERMINAL)

REGULATIONS

As shown in Fig.3, assemble EMI FILTER.

Certainly fix EMI FILTER to wires by BINDER.

A right picture shows the example of two times of the twist.

EMI FILTER
BINDER M

1

2

REPLACEMENT PARTS

09-22

Fig.2

W2 WHITE (FILTER PWB)
WIRE WITH TERMINAL

WIRE BLACK (FUSE HOLDER)
WIRE WITH TERMINAL

REGULATIONS

As shown in Fig.2, connect WIRE WITH TERMINAL.

REPLACEMENT PARTS

09-23

BINDER M

EMI FILTER must pass

W2 WHITE (FILTER PWB) and

WIRE BLACK (FUSE HOLDER)

Fig.3

W2 WHITE (FILTER PWB)
WIRE WITH TERMINAL

WIRE BLACK (FUSE HOLDER)
WIRE WITH TERMINAL

EMI FILTER

Fig. 4

BINDER M

EMI FILTER

Certainly fix EMI FILTER
to wires by BINDER.

Fig.3

Range of installation of

EMI FILTER

REGULATIONS

As shown in Fig.1, assemble EMI FILTER.

Certainly fix EMI FILTER to wires by BINDER.

1

1

1

2

1

2

REPLACEMENT PARTS

09-24

PROCESS

Fig.1

CN110

from W19 BLACK W20 WHITE(FILTER PWB)

WIRE WITH CONNECTOR

YELLOW

CN1
from CN100(FILTER PWB)
WIRE WITH CONNECTOR
BLACK

TM600
from W21 GRAY (FILTER PWB)
WIRE WITH TERMINAL

TM601

from W9 BLACK(FILTER PWB)

WIRE WITH TERMINAL

W9 and W21
twist 9 times form 6 times

Connect wires

(PWB ASSY(FILTER),PWB ASSY(MAIN))

REGULATIONS

As shown in Fig.1, connect wires.

A right picture shows the example of two times of the twist.

REPLACEMENT PARTS

09-25

PROCESS

Fig.1

W25 ORANGE W26 ORANGE
(FILTER PWB)
WIRE WITH TERMINAL

W28 ORANGE (FILTER PWB)
WIRE WITH TERMINAL

W25 and W26 must do the twist

13 times from 10 times

W29 BROWN(FILTER PWB)
WIRE WITH TERMINAL

W28 and W29 must do the twist

13 times from 10 times

The point must become complete in each wire
that does the twist.

Connect WIRE WITH TERMINAL

(THERMISTOR)

REGULATIONS

As shown Fig.3, connect wires.

A right picture shows the example of two times of the twist.

REPLACEMENT PARTS

09-26

Fig.2

W25 ORANGE W26 ORANGE (FILTER PWB)

WIRE WITH TERMINAL

W28 ORANGE (FILTER PWB)
WIRE WITH TERMINAL

W25,W26,W28,W29(FILTER PWB)

Pass WIRE WITH TERMINAL through
EDGE SADDLE.

W29 BROWN(FILTER PWB)
WIRE WITH TERMINAL

Fig.3

THERMISTOR

The wire must not pass
on CASE(PWB)AS

Draw around CN100(FILTER PWB)

WIRE WITH CONNECTER as shown in figure.

REGULATIONS

As shown Fig.3, connect wires.

REPLACEMENT PARTS

09-27

PROCESS

Fig.1

W12 WHITE
(CAPACITOR PWB)
WIRE WITH TERMINAL

Connect it surely.

W13 VIOLET
(CAPACITOR PWB)

WIRE WITH TERMINAL

ACTPM

W7 YELLOW W8 BLUE
(CAPACITOR PWB)
WIRE WITH CONNECTOR

P(WHITE)

N(VIOLET)

W301 YELLOW W302 BLUE
(TR PWB)
WIRE WITH CONNECTOR

TR PWB ASSY

W29 BROWN(FILTER PWB)
WIRE WITH TERMINAL

W28 ORANGE(FILTER PWB)
WIRE WITH TERMINAL

TM102

TM101

W28 and W29 must do the twist

13 times from 10 times

W12 and W13 must do the twist

9 times from 6 times

Connect wires.
(PWB ASSY(CAPACITOR),TR PWB ASSY,etc)

REGULATIONS

As shown in Fig.1, connect wires.

A right picture shows the example of two times of the twist.

REPLACEMENT PARTS

09-28

PROCESS Wiring

REPLACEMENT PARTS

09-29

PROCESS Wiring

REPLACEMENT PARTS

09-30

Model : AO * Z24LBT

PROCESS Wiring

10 . INSTALLATION MANUAL

R410A

CEILING WALL type

INVERTER

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) Also do not use an extension cord.
(5) Do not turn on the power until all installation work is complete.

(6) When connecting pipes, be sure to install the JOINT PIPE included on the indoor unit.

(7) When connecting outdoor units, do not alter the pipe diameter from 15.88 mm to 12.7 mm.

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 30 m. The maximum height difference of the piping is 20 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)

Drain pipe

Cloth tape

1

1

2

8

1

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

ELECTRICAL REQUIREMENT

• Electric wire size and fuse capacity:

1

1

2

Tapping screw(small)

Remote control unit
holder

Seal A

1

Insulation (seal)

1

Power supply cord (mm2)

MAX. 4.0

MIN. 3.5

Connection cord (mm

2

)

MAX. 2.5

MIN. 1.5

Fuse capaclity (A)

30

• Install the disconnect device with a contact gap of at
least 3 mm nearby the units. (Both indoor unit and out­door unit)

• Always make the air conditioner power supply a spe­cial branch circuit and provide a special breaker.

• Always use Type245 IEC57 or equivalent as the power
supply cord and the connection cord.

Joint pipe
#Length: 600 mm

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 dustbox and 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 your neighbors into consideration so that they are not dis-

turbed by air blowing into their windows or by noise.
(5) Provide the space shown in Fig. 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 six directions indicated by 1,
2, 3, 4, 5 and 6 in (Fig. 1). When the piping is connected in

direction 1 or 6, cut along the piping groove in the side of the
front panel with a hacksaw.
When connecting the piping in direction 2 or 4, cut a notch in the
thin wall at the front bottom of the front panel.

INSTALLATION DIAGRAM OF
INDOOR AND OUTDOOR UNITS

Fig. 2

Fig. 1

3Rear piping

1Right piping

2Bottom piping

4Left-bottom

piping

5Left-rear piping

6Left piping

CAUTION

(1) When the outdoor temperature is 0 °C or less, do not use the accessory

drain pipe and drain cap. If the drain pipe and drain cap are used, the drain
water in the pipe may freeze in extremety cold weather.(Reverse cycle model
only)

(2) In the area with heavy snowfall, if the intake and outlet of outdoor unit is

blocked with snow, it might become difficult to get warm and it is likely to
cause of the breakdown. Please construct a canopy and a pedestal or place
the unit on a high stand (local configured).

CAUTION

● Be sure to remove the top grille at the position where

the front panel is installed and removed.

• Be careful that the top grille may fall and cause per­sonal injury.

CAUTION

Install the open panel and top
grill securely. If installation is
imperfect, the open panel or
top grill may fall off and
cause injury.

FRONT PANEL REMOVAL AND INSTALLATION

REMOVING THE FRONT PANEL

(1) Open the open panel, and then remove the top cover and dust box. (For the re-

moval method of dust box, please refer to the OPERATING MANUAL or Dust Box)

(2) Remove the top grille. (For the removal method of top grille, please refer to

the OPERATING MANUAL)
(3) Remove the screw cap, and then remove the fixed screws (3 places).
(4) Press the under cover with hand at [] mark and pull out, and remove inside

hooks (2 places) from the wall hook bracket.
(5) Remove the top hooks of under cover (2 places at left and right).
(6) Remove the front fixed screws (7 places).
(7) Push the lower side of front panel to outside, and remove the lower hooks

from the body.
(8) After pull out the upper hooks inside the front panel (2 places at right side and

left upper body, 1 place in the center upper body), pull them back, and re-

move the front panel.

INSTALLING THE FRONT PANEL

(1) Cover the front panel onto the body from the front side, and mount the upper,

central and lower hooks.
(2) Install the front fixed screws (2 places at left and right side above the body, 1

place in the center of the body, 2 places under the body, 2 places in the center,

altogether 7 places).
(3) Install the top hooks of under cover (2 places at left and right).
(4) Install the inside hooks (2 places) and front hooks (2 places) of under cover.
(5) Install fixed screws (3 places) and screw cap.
(6) Install the top grille.
(7) Fix with screws, install top cover and dust box.

Fig. 4

POWER

WARNING

Under cover

[] mark

Front fixed screws (7 places)

Front panel

Screw cap

Fixed
screw

Wall hook bracket

Top hook (2 places at left and right)

Front hook (2 places)

Inside hooks (2 places)

PUMP DOWN OPERATION (FORCED COOLING OPERATION)

CAUTION

(1) During the pump down operation, make sure that the compressor is turned off before you

remove the refrigerant piping.

(2)

Do not remove the connection pipe while the compressor is in operation with 2 way or 3 way valve open.
This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.

Upper holes (2 places at left and right)

Lower fixed places (2 places)

Upper middle hooks

Central fixed
places (2 places)

Body

Upper hooks (2 places
at left and right)

Upper central
hooks

Front panel

Central hooks
(2 places)

Lower hooks (2 places)

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) Dustbox, air filter and top grill

removal and cleaning, and how
to use the air louvers.

(3) Give the operating and instal-

lation manuals to the cus­tomer.

CUSTOMER GUIDANCE

To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal, recover refrig­erant by doing the cooling operation or forced cooling operation according to the following procedure.
(When the cooling operation cannot start in winter, and so on, start the forced cooling operation.)
1 Do the air purging of the charge hose by connecting the charging hose of gauge manifold to the

charging port of 3 way valve and opening the low-pressure valve slightly.

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

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

4 Close the valve stem of 3 way valve when the reading on the compound pressure gage becomes

0.05~0 Mpa (0.5~0 kg/cm

2

).

5 Stop the operation.

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

• Press the MANUAL AUTO button when stopping the operation from indoor unit side.
(It is not necessary to press on keeping for more than 10 seconds.)

[INDOOR UNIT]

6.7 cm or
over

Wall hook bracket

6.5 cm or over

5 cm or over

(Wall cap)

Connection Cord

Conform to Type245 IEC57

[OUTDOOR UNIT]

10 cm or over

60 cm or over

10 cm or over

60 cm or over

25 cm or
over

150 cm or over

230 cm or

over

Open panel

*The filters come out

of the front of the
indoor unit.

Front panel

Remote
control unit

Remote
control unit
holder

40 cm
or over

5 cm or over

• Do not directly install it on
the ground, otherwise it will
cause failure.

(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 recep-

tacle 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.

• To obtain better operation efficiency,
when the outdoor unit is installed,
be sure to open the front and left
side.

JOINT
PIPE

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(PART No. 9314963032-01) (Z24LB)

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

However, pay careful attention to the following points:

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

els, some of the piping and installation and service tools are special.(See the table below.)
Especially, when replacing a conventional refrigerant(R22) model with a new refrigerant R410A
model, always replace the conventional piping and flare nuts with the R410A piping and flare
nuts.

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

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

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

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

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

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

This air conditioner uses new refrigerant HFC (R410A).

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 use copper pipes thinner than that in the
table 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

5/8

Outer diameter

(mm)

6.35

15.88

R410A

0.80

1.0

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

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

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

to enter the refrigerant cycle.

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

WARNING

CAUTION

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

06J005_9314963032-01 2006.09.26, 15:401

INDOOR UNIT

CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

(1) When cutting the wall hole at the inside of the wall hook bracket, cut the hole within

the range of the left and right center marks 40 mm below the wall hook bracket.
When cutting the wall hole at the outside of the wall hook bracket, cut the hole at

least 10 mm below over.
(2) Cut the hole so that the outside end is lower (5 to 10 mm) than the inside end.
(3) Always align the center of the wall hole. If misaligned, water leakage will occur.
(4) 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 sup-

plied in the installation set.) (Fig. 5)
(5) For left piping and right piping, cut the hole a little lower so that drain water will

flow freely. (Fig. 5)

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 8 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.

[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. 7)

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

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

with decorative tape.

[For Left rear piping, Left piping]

Interchange the drain cap and the drain hose.

Fig. 5

Fig. 6

Fig. 7

Right outlet

Piping (on top)

Drain hose (on bottom)

Rear outlet

Bind with vinyl tape

Drain cap

Drain hose

Bottom outlet

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

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

CAUTION

Install the wall hook bracket horizontally and perpen­dicularly.

Wall hook bracket

Leveling method

Hang weight

from here.

Tapping screw
(size: large; quantity: 8)

Wall hook
bracket

String

Weight

Lower

Centering marks

Fasten with
vinyl tape

(Wall cap)

(Wall pipe)

(Inside)

Wall

(Outside)

Lower

65 mm
hole

65 mm hole

Wall hook bracket

10 mm
or over

5~10 mm

CAUTION

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

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

(2) When inserting, be sure not to attach any material

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

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

mounting drain cap.

(4)

Be sure to fix the drain hose with tape to the bottom

of piping.

(5) Prevent drain water frozen under low tempera-

ture environment.

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

• Under low temperature environment (when outdoor tempera­ture under 0 °C), after cooling operation is executed, water
in the drain hose could be frozen.
Once drain water is frozen, the drain hose will be blocked
and water leakage may be resulted for indoor unit.

80 mm
hole

80 mm
hole

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

bracket and shape the connection pipe.

● Bend the Joint pipe 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. 8

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

Fig. 9

Flare nut

6.35 mm dia.

12.7 mm dia.

15.88 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)

63 to 75 N•m

(630 to 750 kgf•cm)

L dimension

1.4 to 1.7 mm

1.9 to 2.2 mm

2.2 to 2.4 mm

A (mm)

Table 3 Pipe outside diameter

Pipe outside

diameter

ø 6.35 mm (1/4”)
ø 12.7 mm (1/2”)

ø 15.88 mm (5/8”)

Flash tool for

R410A, clutch type

0 to 0.5
0 to 0.5
0 to 0.5

Conventional (R22) flare tool

Clutch type

1.0 to 1.5

1.0 to 1.5

1.0 to 1.5

Wing nut type

1.5 to 2.0

1.5 to 2.0

1.5 to 2.0

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.

Upper hooks

(Lower projections)

Lower slots

Indoor unit

Joint pipe

Small piping

Wall hook bracket

Alignment marks

Large piping

Indoor unit

Wall hook bracket

(Spacer)

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.

OUTDOOR UNIT

OUTDOOR UNIT INSTALLATION

WARNING

1 Install the unit where it will not be tilted by more than 3˚. However, do not install the unit with it tilted towards the side

containing the compressor.

2 When installing the outdoor unit where it may exposed to strong wind, fasten it securely.

(1) Outdoor unit to be fasten with bolts at the four places indicated by

the arrows without fail.

(2) Fix securely with bolts on a solid

block. (Use 4 sets of commer­cially available M10 bolt, nut and
washer.)

(3) Since the drain water flows out of the outdoor unit during heating

operation, install the drain pipe and connect it to a commercial 16
mm hose. (Reverse cycle model only)

(4) When installing the drain pipe, plug all the holes other than the drain

pipe mounting hole in the bottom of the outdoor unit with putty so
there is no water leakage. (Reverse cycle model only)

CAUTION

When the outdoor temperature is 0 °C or less, do not use
the accessory drain pipe and drain cap. If the drain pipe
and drain cap are used, the drain water in the pipe may freeze
in extremely cold weather. (Reverse cycle model only)

Drain pipe mounting hole

Base

Drain pipe

(1) Remove the cap, and connect the gauge manifold and the vacuum

pump to the charging valve by the service hoses.

(2) Vacuum the indoor unit and the connecting pipes until the pressure

gauge indicates –0.1 MPa (–76 cmHg).

(3) When –0.1 MPa (–76 cmHg) is reached, operate the vacuum pump

for at least 60 minutes.

(4) Disconnect the service hoses and fit the cap to the charging valve to

the specified torque.

(5) Remove the blank caps, and fully open the spindles of the 2-way valves

and the 3-way valves with a hexagon wrench [Torque: 6~7 N·m (60 to
70 kgf·cm)].

(6) Tighten the blank caps of the 2-way valve and the 3-way valve to the

specified torque.

Bottom side

Drain cap
mounting place

Drain pipe
mounting place

650 mm

4-ø 12 hole

370 mm

Bolt

Nut

Block

AIR PURGE

20 to 25 N·m (200 to 250 kgf·cm)

30 to 35 N·m (300 to 350 kgf·cm)

10 to 12 N·m (100 to 120 kgf·cm)

Tightening torque

Blank

cap

6.35 mm (1/4 in.)

15.88 mm (5/8 in.)

Charging port cap

Connecting pipe

Blank cap

Hexagon wrench

3-way valve

Charging port

Cap

Service hose
with valve core

Outdoor unit

Use a 4 mm
hexagon wrench.

Gauge manifold

Service hose

Vacuum pump

CAUTION

Use a clean gauge mani­fold and charging hose
for R410A exclusively.

t

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.

Between 15 m and 30 m, when using a connection pipe other than
that in the table, charge additional refrigerant with 20g/1 m as the
criteria.

Pipe length

Additional refrigerant

30 m

300 g

CAUTION

(1) Do not purge the air with refrigerants, but use a vacuum

pump to vacuum the installation! There is no extra re­frigerant in the outdoor unit for air purging!

(2) Use a vacuum pump and gauge manifold and charg-

ing hose for R410A exclusively. Using the same
vacuum for different refrigerants may damage the
vacuum pump or the unit.

(3) After connecting the piping, check the all joints for

gas leakage with gas leak detector.

(4) When adding refrigerant, add the refrigerant from the

charging port at the completion of work.

(5) The maximum length of the piping is 30 m. If the units

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

Lo

Hi

15 m

None

ELECTRICAL WIRING (OUTDOOR UNIT)

(1) Service cover removal

• Remove the two mounting screws.

• Remove the service cover by pushing downwards.

(2) Valve cover removal.

• Remove the one mounting screw.

• Remove the valve cover by sliding upward.

(3) Connect the power supply cord and the connection cord to terminal.
(4) Fasten the power supply cord and connection cord with cord clamp.
(5) Power supply cord and connection cord should be fixed with cable clip as

shown in the figure.

Fill in a gap at the entrance of the cords with insulation (seal).
(6) Put the service cover and valve cover back after completion of the work.

Power supply cord
or connection
cord

30 mm

40 mm or more

Earth wire

Keep the earth wire longer than the other wires.

Power supply cord and
connection cord

Cable clip

Insulation
(Seal)

Direction of the service
panel removal

Service cover

Hook
(3 places)

Hook

(4 places)

Valve cover

Power supply cord
and connection cord

Gap

Valve (Gas)

CAUTION

When connecting the power supply cord, make sure that the phase
of the power supply matches with the phase of
the terminal board. If the phases do not match, the
compressor will rotate in reverse and will not be able to
compress.

Do not make power supply cord and connection cord come in
contact with valve (Gas).

WARNING

1 Before starting work, check that power is not being

supplied to the indoor unit and outdoor unit.

2 Match the terminal board numbers and connection

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

3 Connect the connection cords firmly to the terminal board.

Imperfect installation may cause a fire.

4 Always fasten the outside covering of the connection cord

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

5 Always connect the ground wire.

Control box

Terminal

Power supply cord

Connection cord
(indoor unit and
outdoor unit
connection cord)

Cord
clamp

(1) Open the open panel.
(2) Remove the top cover.
(3) Remove the cord clamp.
(4) Route the connection cord from behind the indoor unit.

(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 connec-

tor. Only use for interconnection between two units.

Fig. 10

Top cover

CAUTION

(5) Connect the end of the connection cord securely to the terminal block.
(6) Secure the connection cord with the cord clamp.
(7) Install the top cover with the screw.
(8) Close the open panel.

INDOOR UNIT WIRING

Cord clamp

Open panel

Connection

cord

Connec­tion cord

Screw

Cord clamp

Screw

Screw

Open panel

CAUTION

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

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

(2) During installation, make sure that the refrigerant pipe is at-

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

40 mm

12 mm

35 mm

12 mm

5 mm

5 mm

● Be sure to install around the drain hose connector.

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

magnet.

Removal method of
drain hose

● Remove the screw at the left

of drain hose and pull out
drain hose.

Installation method of
drain hose

● Vertically insert the drain hose

till the drain furniture aligns
with the screw hole of drain
cock. After inserting and be­fore replacing, please reinstall
and fix the removed screws.

Screw

Drain furniture

Drain hose

Drain cock

Drain furniture

Drain hose

Screw hole

Screw

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. 15

Fig. 16

Left piping

Connection
cord

Drain hose

For connection from the left rear

(Wall pipe)

Connection

cord

Connection
piping

Drain hose

Holder

Drain hose

(Included with the piping
set sold separately or
obtained locally)

Lifted up Bent Immersed in water

BAD

BAD

BAD

(Saddle)

(Outside wall cap)

(Sealer putty)

(Outdoors)

Wall

Pipe

Pipe

Drain hose

Cloth tape

Wrap with cloth tape

Overlap the insulation

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

Connection pipe
(heat insulation)

Vinyl tape

Indoor unit pipe
(heat insullation)

Seal A

TEST RUNNING

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?

Test run button

Fig. 17

● 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.)

Connection piping

9314963032-01

Die

A

Pipe

CAUTION

Drill the hole on wall with diameter shown in the table below.

When taking out pipe from rear (

3

Fig.1) or left rear (5Fig.1), if the

hole diameter has been set

ø

80 mm, the wall cap will interfere with

the air conditioner and mounting plate.

INDOOR UNIT PIPING DIRECTION (Fig.1) Diameter of hole in the wall

1246

35

ø80
ø65

06J005_9314963032-01 2006.09.26, 15:402

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

FEB 2007 Printed in Japan