Fujitsu AB*A30LBT, AB*A36LBT, AO*A30LBTL, AO*A36LBT, AO*A30LBTL Series Service Instruction

SPLIT TYPE
ROOM AIR CONDITIONER

Large Ceiling type

Models Indoor unit Outdoor unit

INVERTER

SERVICE

INSTRUCTION

R410A

AB*A30LBT
AB*A36LBT

AO*A30LBTL
AO*A36LBTL

CONTENTS

1. SPECIFICATIONS

SPECIFICATIONS.......................................................................................................... 01-01

2. DIMENSIONS

DIMENSIONS.................................................................................................................. 02-01

3. REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT CIRCUIT............................................................................................... 03-01

4. CIRCUIT DIAGRAM

CIRCUIT DIAGRAM........................................................................................................ 04-01

5. DESCRIPTION OF EACH CONTROL OPERATION

5-1-1 COOLING CAPACITY CONTROL......................................................................

5-1 COOLING OPERATION............................................................................................

5-4 AUTO CHANGEOVER OPERATION........................................................................

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

5-6 OUTDOOR FAN CONTROL......................................................................................

05-01

05-01

5-2-1 HEATING CAPACITY CONTROL......................................................................

5-2 HEATING OPERATION.............................................................................................

05-02

05-02

5-3-1 INDOOR UNIT CONTROL.................................................................................

5-3 DRY OPERATION......................................................................................................

05-03

05-03

05-04

05-05

05-07

5-7 LOUVER CONTROL.................................................................................................

05-08

5-9 TIMER OPERATION CONTROL...............................................................................

05-10

5-10 ELECTRONIC EXPANSION VALVE CONTROL....................................................

05-11

5-11 TEST OPERATION CONTROL...............................................................................

05-13

5-12 PREVENT TO START FOR 3 MINUTES (3 MINUTES ST)....................................

05-13

5-13 4-WAY VALVE EXTENSION SELECT....................................................................

05-13

5-14 AUTO RESTART.....................................................................................................

05-14

5-15 PUMP DOWN (For AB*30/ 36 LBT)........................................................................

05-14

5-17 COMPRESSOR PREHEATING...............................................................................

05-14

05-15

05-14

5-20 ECONOMY OPERATION.........................................................................................

05-18

5-21 VARIOUS PROTECTIONS......................................................................................

05-19

05-20

5-22 COMPRESSOR STOP CONTROL..........................................................................

5-18 DEFROST OPERATION CONTROL.......................................................................

05-15

5-19 OFF DEFROST OPERATION CONTROL...............................................................

05-17

5-16 MANUAL AUTO OPERATION (When using the Wireless RC) ...........................

5-8 COMPRESSOR CONTROL......................................................................................

6. REFRIGERANT CAUTION -R410A-

6-1 R410A TOOLS............................................................................................................ 06-01

6-2 PRECAUTION FOR INSTALLATION.........................................................................

06-02

6-3 PRECAUTION FOR SERVICING...............................................................................

06-04

6-4 NEW REFRIGERANT R410A.....................................................................................

06-05

6-5 DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS.......

06-08

8. APPENDING DATA

9. INSTALLATION MANUAL

8-1 CAPACITY TABLE..................................................................................................... 08-01

8-2 OPERATION RANGE.................................................................................................

08-03

8-3 ELECTRIC CHARACTERISTICS...............................................................................

08-04

8-4 SAFETY DEVICE........................................................................................................

08-05

8-5 FUNCTION SETTING.................................................................................................

08-06

08-11

7-1-1 INDOOR UNIT DISPLAY....................................................................................

7-1-2 WIRED REMOTE CONTROLLER DISPLAY......................................................

7-1 ERROR DISPLAY......................................................................................................

7. TROUBLE SHOOTING

7-2 TROUBLE SHOOTING WITH ERROR CODE..........................................................

7-3 TROUBLE SHOOTING WITH NO ERROR CODE....................................................

7-4 SERVICE PARTS INFORMATION............................................................................

07-01

07-01

8-5-1 INDOOR UNIT....................................................................................................

08-06

8-5-3 Procedures to change the Function Setting for wireless RC............................. 08-08

08-07

8-5-5 WIRED REMOTE CONTROLLER......................................................................

08-10

07-03

07-31

07-05

07-36

8-5-2 Switching Remote Control Unit Signal Codes.....................................................

8-5-4 Procedures to change the Function Setting for wired RC...............................

7-1-3 OUTDOOR UNIT DISPLAY................................................................................ 07-04

1 . SPECIFICATIONS

R410A

Large Ceiling type

INVERTER

01-01

AB A30LBT AB A36LBT

Cooling A A

Heating A A

kW 8.50 9.40

BTU/h 29000 32100

kW 2.80 - 10.00 2.80 - 11.20

BTU/h 9500 - 34100 9500 - 38200

kW 10.00 11.20

BTU/h 34100 38200

kW 2.70 - 11.20 2.70 - 12.70

BTU/h 9200 - 38200 9200 - 43300

2.65 2.93

3.88 4.56

2.77 3.02

3.88 4.56

11.6 12.8

17.0 20.0

12.2 13.2

17.0 20.0

EER 3.21 3.21

COP 3.61 3.71

l/h (pints/h) 2.5(5.3) 3.0 (6.3)

High 1660 1900

Med 1500 1500

Low 1200 1200

Quiet 1000 1000

High 1660 1900

Med 1500 1500

Low 1200 1200

Quiet 1000 1000

Type × Q'ty

Motor output W 120 120

High 45 47

Med 43 43

Low 37 37

Quiet 32 32

High 45 47

Med 43 43

Low 37 37

Quiet 32 32

Dimensions (H × W × D) 252 × 1350 × 39.9 252 × 1350 × 39.9

Fin pitch 1.45 1.45

Rows x Stages 3 × 12 3 × 12

Pipe type

Fin type

Material

Colour

Net

Gross

Net 46 ( 101 ) 46 ( 101 )

Gross 58 ( 128 ) 58 ( 128 )

Liquid

9.52 ( 3 / 8 in.) 9.52 ( 3 / 8 in.)

Gas

15.88 ( 5 / 8 in.) 15.88 ( 5 / 8 in.)

Method Flare Flare

°C 18 to 32 18 to 32

%RH 80 or less 80 or less

Heating °C 16 to 30 16 to 30

mm

Note :
Specifications are based on the following conditions.
Cooling : Indoor temperature of 27 °CDB / 19 °CWB.and outdoor temperature of 35 °CDB/24 °CWB.
Heating : Indoor temperature of 20 °CDB / 15 °CWB.and outdoor temperature of 7 °CDB/6 °CWB.
Pipe length : 5 m, Height difference : 0 m.(Outdoor unit - Indoor unit)
The maximum current and the maximum input value are the maximum value when operated within the operation range(temperature)

European energy label

ABS

Outer diameter : 26.0 / Inner diameter : 21.5

Airflow
rate

Cooling

Heating

m3/h

Cooling

White

240 × 1660 × 700

318 × 1800 × 790

Wireless

Sirocco × 4

Copper

Aluminium

ABS

CEILING MODEL

INVERTER HEATPUMP

230V 50Hz

198-264V 50Hz

Operation range
Cooling

kg(lb.)

Connection pipe
Size

mm

Remote controller type

Drain pipe
Material

Size

Dimensions
( H× W × D )

mm

Weight

Heat exchanger type

Enclosure

mm

Fan

Current

Cooling

A

Heating
Rated

*Max.

Rated

*Max.

kW/kW

kW

Heating
Rated

*Max.

Rated

*Max.

Heating

Sound pressure level

Heating

Rated

Min. - Max.

Rated

Min. - Max.

Heating

Input power

Cooling

dB(A)

Type
Model name

Power source

Available voltage range

Capacity

Cooling

Moisture removal

Cooling

1. SPECIFICATIONS

INDOOR UNIT

AO A30LBTL AO A36LBTL

Power source

Available voltage range

A 15.0 15.0

Cooling 3600 4000

Heating 3800 3800

Type × Q'ty

Motor output W 103 103

Cooling 53 54

Heating 55 55

Dimensions (H × W × D)

798 × 900 × 36.4 798 × 900 × 36.4

Fin pitch 1.30 1.30

Rows x Stages 2 × 38 2 × 38

Pipe type

Fin type

Motor output W

Charge g

Material

Colour

Net

Gross

Net

Gross

Liquid

Gas

Method

Max. length 50(chargeless:20) 50(chargeless:20)

Max. height difference 30 30

Cooling

Heating

Note :
Specifications are based on the following conditions.
Cooling : Indoor temperature of 27 °CDB / 19 °CWB.and outdoor temperature of 35 °CDB/24 °CWB.
Heating : Indoor temperature of 20 °CDB / 15 °CWB.and outdoor temperature of 7 °CDB/6 °CWB.
Pipe length : 5 m, Height difference : 0 m.(Outdoor unit - Indoor unit)

°C

Operation range
Type

Model name

Fan
Airflow

rate

m3/h

dB(A)

mm

mm

Weight

kg(lb.)

Dimensions
(H × W × D)

Refrigerant oil

Type

Enclosure

Heat exchanger type

Starting current

Compressor
Type × Q'ty

Refrigerant
Type

Sound pressure level

m

Connection pipe

Size

mm

INVERTER HEATPUMP

230V 50Hz

198-264V 50Hz

Propeller × 1

9.52 ( 3/8 in.)

Copper

Aluminium

Steel sheet

Beige (10YR7.5/1.0NN)

Twin Rotary × 1

1700

R410A

PVE

2100

15.88 ( 5/8 in.)

Flare

-15 to 46

-15 to 24

830 × 900 × 330

62 ( 136 )

70 ( 154 )

970 × 1050 × 445

OUTDOOR UNIT

01-02

2 . DIMENSIONS

R410A

INVERTER

Large Ceiling type

02 - 01

2. DIMENSIONS

Top view

Side view

Rear view

MODEL : AB A 30 / 36 LBT

(Unit : mm)

1 2 3

45

6

30 30

Suspension bolt pitch

1,600

INDOOR UNIT (Top view)

Dimensions
(Space Required
for Installation)

10
155

300

INDOOR UNIT

Suspension bolt
should extend
outward 30 to 75.

1

Refrigerant piping flare connection (Gas)

Refrigerant piping flare connection (Liquid)

Drain piping connection

Knock out hole for fresh air

Knock out hole for refrigerant piping

Hole for lifting bolt (Use M10 screw bolt)

2

3

4

5

6

141

Ø200

114

373

Ø200

02 - 02

2. DIMENSIONS

MODEL : AO A 30 / 36 LBTL

MOUNTING POSITION

(Unit : mm)

When there are obstacles at the
back or front sides.

When there are obstacles at the
back, side(s), and top.

When there are obstacles at the
back, side with the installation of
more than one unit.

603

Air flow

900

650

830

370

99

196

21

9

77

31 330

400

170

147

12

600 m

m

or

mo

re

250

m

m

or more

250

m

m

or more

300

mm

or

m

o

re

600 mm or more

100

m

m

or more

30

0

m

m

or

m

o

r

e

1

0

0

mm

o

r mo

re

25

0

mm

or

more

(

S

ervic

e s

pace)

Top view

Front view

Side view

Bottom view

3 . REFRIGERANT SYSTEM DIAGRAM

R410A

INVERTER

Large Ceiling type

03 - 01

3. REFRIGERANT CIRCUIT

MODEL : AO A 30 / 36 LBTL

4 . CIRCUIT DIAGRAM

R410A

INVERTER

Large Ceiling type

04 - 01

4. CIRCUIT DIAGRAMS

MODEL : AB A30 / 36 LBT

INDOOR UNIT

04 - 02

MODEL : AO A30 /36 LBTL

OUTDOOR UNIT

5 . DESCRIPTION OF EACH
CONTROL OPERATION

R410A

Large Ceiling type

INVERTER

5-1. COOLING OPERATION

5-1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
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 °C higher than a set temperature,
the compressor operation frequency will attain to maximum frequency.

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

* When the room temperature is between +2 °C to -2.5 °C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.

minimum
frequency

maximum
frequency

AO*A30LBTL

23Hz 94Hz

AO*A36LBTL

Outdoor air
temperature

( Table 1 : Compressor Frequency Range )

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

05-01

5. DESCRIPTION OF EACH CONTROL OPERATION

AO*A30LBTL

A zone
B zone
C zone
D zone
E zone
F zone

Me Lo Qu

Fan speed mode

Hi

A zone

36°C

34°C

B zone

32°C

30°C

C zone

21°C

19°C

D zone

12°C

10°C

E zone

2°C

0°C

F zone

When the room
temperature drops

When the room
temperature rises

94Hz 76Hz 64Hz 51Hz
94Hz 76Hz 64Hz 51Hz
85Hz 64Hz 57Hz 51Hz

64Hz 57Hz 51Hz 45Hz

AO*A36LBTL

5-2. HEATING OPERATION

5-2-1 HEATING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
The maximum frequency is limited in the range shown in Figure 2 based on the outdoor temperature.
* If the room temperature is lower 3 °C than a set temperature,
the compressor operation frequency will attain to maximum frequency.

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

* When the room temperature is between +2.5 °C to -3 °C of the setting temperature,
the compressor frequency is controlled within the range shown in Table2.

( Table 2 : Compressor Frequency Range )

( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )

05-02

minimum
frequency

maximum
frequency

AO*A30LBTL

23Hz

120Hz

AO*A36LBTL

AO*A30LBTL

C zone

19°C

C zone

B zone 120Hz 88Hz 76Hz 67Hz

17°C

A zone

14°C

B zone

12°C

A zone

Lo Qu

Fan speed mode

Hi Me

Outdoor air
temperature

When the room
temperature drops

When the room
temperature rises

AO*A36LBTL

5-3. DRY OPERATION

5-3-1 INDOOR UNIT CONTROL

The compressor rotation frequency shall change according to set temperature and room
temperature variation which the room temperature sensor of the indoor unit has detected
as shown in the Fig 3.

( Table 3 : Compressor frequency )

05-03

Operating frequency

[ AB*A30LBTL ]

51Hz

Room
temperature

Room
temperature

Compressor ON

Ts+1.5 °C

Ts+0.5 °C

Compressor OFF

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

Ts : Setting temperature

Compressor

ON

OFF

Indoor fan

Dry air flow

S-Lo

OFF

( Fig.4 : Indoor Fan Control )

10 30 60 180 60 180 60 10 30

(sec)

[ AB*A36LBTL ]

X zone

Y zone

Temperature zone

0Hz

X zone

Y zone

[ AB*A30/36LBT : Dry air flow 650rpm, S-Lo 250rpm ]

5-4. 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 and MONITORING modes. During operation, the
optimum mode is automatically swiched in accordance with temperature changes. The temperature
can be set between 18°C and 30°C in 1 °C steps.

When operation starts, only the indoor fan is operated for 1 minute. (Air flow mode: S- Lo)
After 1 minute, depends on the room temperature and outdoor unit's operarion mode,
the operation mode is selected in accordance with the below.

( Table 4 : Operation mode selection table )

1

05-04

Room temperature :Tb

A zone

Tb > Ts +2 °C

Ts -2 °C > Tb

Ts +2 °C > Tb > Ts -2 °C

Monitoring

Monitoring

Heating

Ts : Setting temperature

B zone

Cooling
(Automatic Dry)

Monitoring

Heating

C zone

Monitoring

Monitoring

=

=

( Fig.5 : Operation mode selection based on Outdoor Temperature )

Cooling
(Automatic Dry)

[ For AB*A30/ 36LBT ]

A zone

B zone

C zone

32°C

-15°C

Outdoor temperature zone

When COOLING was selected at , the air conditioner operates as follow:

The same operation as COOLING OPERATION of item 5-1 above is performed.
However, the setting temperature is raised 1°C and the room temperature correct coefficient value is 0°C

When the compressor frequency have been below 23Hz for 8 minutes or the room temperature reaches
"setting temperature -1.5°C" , operation is automatically switched to DRY OPERATION of item 5-3 above
is performed.
However, compressor control based on room temperature is as follows.

If the room temperature reaches "setting temperature +2°C" during DRY operation,
operation returns to COOLING operation.

When HEATING was selected at , the same operation as HEATING OPERATION of item 5-2
above is performed. However, the room temperature correct coefficient value is 0°C.

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

2

3

1

4

1

Room
temperature

Compressor :ON

Compressor :OFF

Ts - 0.5°C

Ts - 1.5°C

Outdoor
temperature

5-5. INDOOR FAN CONTROL

1. Fan speed

( Table 5 : Indoor Fan Speed )

2. FAN OPERATION

The airflow can be switched in 5 steps such as AUTO, QU, LOW, MED, HIGH, while the indoor
fan only runs.

When [AUTO] is selected, the indoor fan motor runs continuously [MED] mode.

AB*A30LBT

Operation mode Air flow mode Speed (rpm)

Hi 1000

910
750
650

Me

Lo

Cooling

Qu

Hi 1000

1000

910
750

Me+

Me

Heating

Lo

AB*A36LBT

Operation mode Air flow mode Speed (rpm)

Hi 1100

910
750
650

Me

Lo

Cooling

Qu

Hi 1100

1100

910
750

Me+

Me

Heating

Lo

650

Qu

650

Qu

Auto

500

Dry

S-Lo 250

Monitoring

Auto

500

Dry

S-Lo 250

Monitoring

3. COOLING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 5.
On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow of [COOL]
operation modes QU, LOW, MED, HIGH,as shown in Table 6.

( Fig.6 : Airflow change - over ( Cooling : AUTO ) )

When the room
temperature rises

When the room
temperature drops

TR : Room temperature
Ts : Setting temperature

TR-Ts > 2 °C

=

1 °C > TR-Ts

2 °C > TR-Ts > 1 °C

=

TR-Ts > 2.5 °C

=

1.5 °C > TR-Ts

2.5 °C > TR-Ts > 1.5 °C
=

HIGH mode

MED mode

LOW mode

650

Cool Air Prevention Cool Air Prevention

650

05-05

4. HEATING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 7.

On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow
of [HEAT] operation modes QU, LOW, MED, HIGH, as shown in Table 5.

5. COOL AIR PREVENTION CONTROL (Heating mode)

6. DRY OPERATION

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

05-06

42°C

30°C

34°C

Indoor heat exchanger
temperature

Indoor heat exchanger
temperature

When the compressor operates, 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.
When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.

( Fig.7 : Airflow change - over ( Heating : AUTO ) )

( Fig.8 : Cool Air Prevention Control )

< [Hi] setting >

Hi

Me+

Lo

Cool air
prevention

39°C

37°C

37°C

32°C

24°C

39°C

32°C

Indoor heat exchanger
temperature

Indoor heat exchanger
temperature

< The other of [Hi] setting >

S-Lo

Lo (Qu)

Cool air
prevention

37°C

30°C

34°C

24°C

Setting
FAN mode

S-Lo

TR-Ts > - 1.5 °C

=

- 2.5 °C> TR-Ts

- 1.5 °C> TR-Ts > - 2.5 °C
=

TR-Ts > - 1 °C

=

- 2 °C> TR-Ts

- 1 °C> TR-Ts > - 2 °C
=

When the room
temperature rises

When the room
temperature drops

TR : Room temperature
Ts : Setting temperature

LOW mode

MED mode

HIGH mode

[ AB*A30/36LBT : Cool air prevention 500rpm, S-Lo 250rpm ]

5-6. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor
1-1. For AO*A30/ 36LBTL ( AB*A30 / 36LBT , AR*A30 / 36LBTU )

Following table shows the fan speed of the outdoor unit.

Table 6 : Fan speed of the outdoor unit

Table 7 : Fan speed when starting up outdoor fan

Outdoor temperature [Ta]

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.

After operating the defrost control function on heating mode except economy operation,
its speed becomes 900rpm
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.

Cooling

Dry

900/ 850/ 780/ 700/ 500 rpm

500 rpm

AO*A30LBTL

Outdoor temperature zone

Fan speed

500 rpm

200 rpm

AO*A30LBTL
AO*A36LBTL

Heating

900/ 780/ 700/ 550/ 450 rpm

340/ 320/ 250/ rpm

2°C > Ta

260/ 250/ rpm

260/ 250/ rpm

12°C > Ta > 2°C

Ta > 12°C

12°C

2°C

10°C

0°C

D zone ( Normal )

F zone

G zone

Outdoor temperature zone

COOL D zone (Normal) / HEATING

COOL F,G zone

05-07

340/ 320/ 250/ rpm

AO*A36LBTL

AO*A30LBTL

850/ 780/ 700/ 500 rpm

500 rpm

340/ 320/ 250/ rpm

2°C > Ta

260/ 250/ rpm

260/ 250/ rpm

12°C > Ta > 2°C

Ta > 12°C

AO*A36LBTL

340/ 320/ 250/ rpm

5-7. LOUVER CONTROL

05-08

1. VERTICAL LOUVER CONTROL (AB*A30 / 36LBT)

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

Use the air direction adjustments within the ranges shown above.

The vertical airflow direction is set automatically as shown, in accordance with the type of operation
selected.

Cooling / Dry / Fan mode Horizontal flow
Heating mode Downward flow

(Function Range)

(Fig.9 : Air Direction Range)

(Operation Range)

2. SWING OPERATION (AB*A30 / 36LBT)

When the swing signal is received from the remote controller, the vertical louver starts to swing.
The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.

( Stop mode means Operation stop.)

During Cooling/Dry mode/Fan mode :
During Heating mode :

During AUTO mode operation, for the first minute after beginning operation, air -flow will be horizontal
; the air direction cannot be adjusted during this period.

The type of operation

Cooling/Dry/Fan

Range of swing

to

Heating

to

5

5

5

3

5

5

05-09

3. HORIZONTAL LOUVER CONTROL (AB*A30 / 36LBT)

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

(Function Range)

(Fig.10 : Air Direction Range)

4. SWING OPERATION (AB*A30 / 36LBT)

When the swing signal is received from the remote controller, the horizontal louver starts to swing.
The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.

( Stop mode means Operation stop.)

The type of operation

Cooling/Dry

Range of swing

to

Heating

to

5

FAN

to

5

Use the air direction adjustments within the ranges shown above.
The remote control unit's display does not change.

5

5

(All range)
(All range)

(All range)

5-8. COMPRESSOR CONTROL

1. OPERATION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as
shown in Table 9.

Cooling Heating

Min Max Min Max

Dry

(Table 9 : Compressor Operation Frequency Range)

2. OPERATION FREQUENCY CONTROL AT START UP

2-1. For AB*A30/ 36LBT

The compressor frequency soon after the start-up is controlled as shown in Figure 13.

(Fig.13 : Compressor Control at Start-up)

40Hz

60sec 100sec

59Hz

05-10

AB*A30LBT

23Hz

94Hz

23Hz

120Hz

51Hz

AB*A36LBT

46sec

05-11

5-9. TIMER OPERATION CONTROL

AR-SY1

1. ON / OFF TIMER

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

2. PROGRAM TIMER

5-9-1 Wireless Remote Controller

ON / TIMER
OFF / TIMER
PROGRAM TIMER
SLEEP 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.

Stop mode

Stop mode

Stop mode

Operation mode

Operation mode

Set time

Set time Set time Set time

05-12

3. SLEEP TIMER

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

Set temperature rises
( Ts : Set temperature )

Stop of operation

Set temperature lowers
( Ts : Set temperature )

Ts

Stop of operation

In the cooling operation mode

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

Ts

+1degC

+2degC

-2degC

-1degC

-4degC

-3degC

Set

60min

In the heating operation mode

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

Set

30min

60min

90min

5-10. ELECTRONIC EXPANSION VALVE CONTROL

5-11. TEST OPERATION CONTROL

Under the condition where the air conditioner stops, press the MASTER CONTROL button and
the FAN CONTROL button simultaneously for 2 seconds or more, and the test operation control
mode will appear.
During test running, " " will display on the remote controller display.
Set the test operation mode, and the compressor will continue to run regardless of whatever
the room temperature sensor detects.
The test operation mode is released if 60 minutes have passed after setting up the test operation.

The compressor won't enter operation status for 3 minutes after the compressor is stopped,
even if any operation is given.

5-12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )

05-13

With Wired Remote Controller

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.

Pulse range

53 480 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.
* 4 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.)

AB*A30LBT
AB*A36LBT

Cooling/ Dry

Heating

Operation

Under the condition where the air conditioner runs, press the TEST RUN button, 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 test operation mode is released if 60 minutes have passed after setting up the test operation.

With Wireless Remote Controller

40 480 pulse

At the time when the air conditioner is switched from the cooling mode to heating mode,
the compressor is stopped, and the 4-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 resumed with
the memorized operation contents.
When the power is interrupted and recovered during timer operation, timer operation is canceled,
but only setting time is memorized.

[Operation contents memorized when the power is interrupted]

Operation mode
Set temperature

Set air flow

Timer mode and timer time
Thermistor detected position (When using the Wired Remote Controller)

5-13. 4-WAY VALVE EXTENSION SELECT

5-14. AUTO RESTART

05-14

5-15. PUMP DOWN ( For AB*A30/ 36LBT )

When the product is stopped:

1. Press the PUMP DOWN switch (SW2) on the outdoor unit.
(The LED on the outdoor unit circuit board starts lighting.

2. The pump down operation (cooling operation) begins right away.
After operation starts, close the 3-way valve (liquid).

3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.

4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that
the LED has gone out.

When the product is operating:

1. Press the PUMP DOWN switch (SW2) on the outdoor unit. The LED on the outdoor unit circuit board starts
flashing, and operation stops.
At this point, recovery has not been completed, so do not close the 3-way valves (liquid and gas).

2. The pump down operation (cooling operation) begins after 3minutes.
Close the 3-way valve (liquid) after operation starts.

3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.

4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that
the LED has gone out.

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit.

5-16. MANUAL AUTO OPERATION (When using the Wireless RC)

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

OPERATION MODE

Auto changeover

Auto

Continuous
(No timer setting available)

24°C

(Table 10)

SETTING TEMP.

FAN CONT. MODE

TIMER MODE

05-15

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Release Condition

Outdoor heat exchanger temperature sensor value is higher than +13°C or
Compressor operation time has passed 15 minutes.

5-18. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 12.

(Table 12 : Condition of starting Defrost Operation)

1st time defrosting after starting operation

Less than 17 min.

17 to 62 min.

62 min. to 4 hours

After 4 hours

Does not operate

- 9°C

- 5°C

- 3°C

Compressor integrating
operation time

Compressor contiguous
operation time

Defrost operation is released when the conditions become as shown in Table 13.

(Table 13 : Defrost Release Condition)

Operation
temperature

Below 10 min.

Above 10 min.

Less than 35 min.

35 min. to 4 hours

After 4 hours

Does not operate

- 6°C

- 3°C

Compressor integrating
operation time

Compressor contiguous
operation time

Operation
temperature

Below 10 min.

Above 10 min.

Defrosting after 2nd time upon starting operation

5-17. COMPRESSOR PREHEATING

When the outdoor heat exchanger temperature is lower than 5°C 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 7°C or greater,
preheating is ended.

(Not defrosted for 10 minutes)

Outdoor fan : OFF
Compressor frequency : 0 Hz
EEV : 480pulse
4-way valve : OFF
Outdoor fan : OFF
Compressor frequency : 70Hz

Heating operation start : Compressor ON

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

05-16

Defrost start

3. Defrost Flow Chart

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

Compressor integrating
operation:
Over 17 minutes to
below 62 minutes

Compressor integrating
operation:
Over 240 minutes

Compressor integrating
operation:
Over 62 minutes to
below 240 minutes

Outdoor
heat exchanger
temperature:
Below - 9°C

Outdoor
heat exchanger
temperature:
Below - 5°C

Compressor integrating
operation:
Over 35 minutes to
below 240 minutes

Outdoor
heat exchanger
temperature:
Below - 6°C

Compressor integrating
operation:
Over 240 minutes

Outdoor
heat exchanger
temperature:
Below - 3°C

Outdoor
heat exchanger
temperature:
Below - 3°C

(In case of 1st defrost)

(In case of 2nd and later defrost)

AB*A30/ 36LBTL

Outdoor temp ­Outdoor heat exchanger
temperature:
Above 5 degC

05-17

Release Condition

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

5-19. OFF DEFROST OPERATION 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.
and compressor operation contiguous time lasts for more than 10 minutes.

OFF Defrost Flow Chart

Heating operation stop

2. OFF DEFROST END CONDITION

Outdoor heat exchanger temperature: Over 10°C
or
Compressor ON time: Over 15 minutes

Outdoor heat exchanger temperature:
Below - 4°C
and
Compressor integrating operation:
Over 30 minutes
and
Compressor contiguous operation:
Over 10 minutes

Defrost start

Defrost Indicator:
[Operation lamp]
7 sec ON / 2 sec OFF

Defrost end

05-18

5-20. ECONOMY OPERATION

At the maximum output, ECONOMY OPERATION is approximately 70% of normal air conditioner operation
for cooling and heating.
When ECONOMY OPERATION is performed during the cooling mode,dehumidification is improved.
This function is especially convenient when you want to remove the humidity in the room
without significantly lowering the room temperature.
During ECONOMY OPERATION, the thermostat setting automatically changes according to the temperature
to avoid Unnecessary cooling and heating for the most economical operation.

If the room is not cooled (or heated) well during economy operation, select normal operation.

During the monitor period in the AUTO mode, the air conditioner operation will not change
to ECONOMY OPERATION even if ECONOMY OPERATION is selected by pressing the ECONOMY button.

5-21. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL

The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas
temperature.
When the discharge temperature becomes higher than 104°C, 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 101°C.
When the discharge temperature becomes lower than 101°C, the control of the compressor
frequency is released.
When the discharge temperature becomes higher than 110°C, the compressor stops

2. CURRENT RELEASE CONTROL

2-1. For AO*A 30/ 36LBTL

1-1. For AO*A 30/ 36LBTL

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 13 : Current Release Operation Value / Release Value)

[ Heating ]

OT (Control / Release)

10.0A/ 9.5A

11.5A/ 11.0A

15.0A/ 14.5A

15.0A/ 14.5A

17°C

12°C

OT : Outdoor Temperature

5°C

AO*A30LBTL

OT (Control / Release)

10.0A/ 9.5A

11.5A/ 11.0A

15.0A/ 14.5A

18.0A/ 17.5A

17°C

12°C

OT : Outdoor Temperature

5°C

AO*A36LBTL

[ Cooling ]

OT (Control / Release)

10.0A/ 9.5A

13.0A/12.5A

15.0A/ 14.5A

46°C

40°C

OT : Outdoor Temperature

AO*A30LBTL

OT (Control / Release)

10.0A/ 9.5A

13.0A/ 12.5A

18.0A/ 17.5A

46°C

40°C

OT : Outdoor Temperature

AO*A36LBTL

50°C

9.0A/8.5A
50°C

12°C

12°C

2°C

2°C

14.5A/14.0A

14.5A/14.0A

13.0A/12.5A 13.0A/12.5A

9.0A/8.5A

05-19

05-20

- 20°C

Cooling

Heating

5-22. COMPRESSOR STOP CONTROL

When the detection value of outdoor temperature sensor is lower than temperature
in the table below, the compressor is stopped.

(Table 15 : Operation temperature of compressor stop control)

Operation
temperature

Temperature

4. COOLING PRESSURE OVERRISE PROTECTION

When the outdoor unit heat exchange sensor temperature rises to 67°C or greater,
the compressor is stopped and trouble display is performed.
After 3 minutes ST, release of protection.

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 .

(Table 14 : Anti-freezing Protection Operation / Release Temperature)

Outdoor temperature

Over than 10°C *1

or 12°C *2

Less than 10°C *1

or 12°C *2

*1. When the temperature rises.
*2. When the temperature drops.

4°C

7°C

13°C

Temperature 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.

73Hz or greater 70Hz
70 36Hz
33 27Hz 23Hz

23Hz OFF

Indoor heat exchange
temperature

[ Control System ]

Refer to below

It returns to the normal operation

Compressor Operation

Frequency down every 120 sec

55°C

53°C

52°C

50°C

The compressor frequency is
decreased 3Hz every 60seconds.

6 . REFRIGERANT CAUTION -R410A-

R410A

Large Ceiling type

INVERTER

6-1. 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

6. REFRIGERANT CAUTION -R410A-

6-2. 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

6-3. 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

6-4. NEW REFRIGERANT R410A

What is HFC ?

Phase-out schedule of HCFC

according to Montreal protocol

1996 20102000 2004 2015 2020 2030

60

40

20

100

(Year)

(%)

80

(HCFC consumption of 1989) +

(CFC consumption of 1989) x 2.8%

65%

35%

10%

0.5%

started control

only service use

total abolition

100% =

0

*

06-05

Ozone Layer depleting mechanism

CFC

CFCl

2

Cl Ozone

(O3)

O

2

ClO

Cl

sunbeam

What is CFC and HCFC?

CFC : Chloro-Fluoro-Carbon

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

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

HCFC : Hydro-Chloro-Fluoro-Carbon

For example : R22 (for air-conditioner)

R134a (for Car air conditioner)

HFC3 : Hydro-Fluoro-Carbon

R407C (for air conditioner)

Refrigerant characteristics

R22

Composition

(wt%)

R22

(100)

Boiling Point

- 40.8

Behavior ---

Pressure at 54.5

C

(kPa)

2,151

Temperature Glide

(deg)

0

ODP 0.055

R407C

R32/R125/R134a

(23/25/52)

- 43.6

zeotrope

2,262

5.4

0

R410A

R32/R125

(50/50)

- 51.4

near azeotrope

3,406

0.11

0

06-06

Summary of R407C and R410A characteristics

Pressure (Mpa) Temp ( C)

2.20 37.9

2.25 38.7

2.30 39.6

2.35 40.5

2.40 41.3

2.45 42.1

2.55 43.8

2.60 44.6

2.65 45.3

2.70 46.1

2.75 46.8

2.80 47.6

2.85 48.3

2.90 49.0

2.95 49.8

3.00 50.5

3.05 51.2

3.10 51.9

3.15 52.6

3.20 53.2

3.25 53.9

3.30 54.6

3.35 55.3

3.40 55.9

3.45 56.5

3.50 57.1

2.55 57.8

3.60 58.4

3.65 59.0

3.70 59.6

3.75 60.2

3.80 60.8

3.85 61.4

3.90 52.0

3.95 62.5

4.00 63.1

4.05 63.6

4.10 64.2

4.15 64.8

Temp ( C) Pressure (Mpa)

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

Desighed pressure of R410A refrigerant

< Pressure Temp >

Relation between R410A condensing temperature and saturated pressure.

< Temp Pressure >

Advantage

Disadvantage

Suitable for

R410A

higher system

performance

Near-Azeotropic

refrigerant

1.6 times higher

(difficult to design against

pressure resistance)

Small Air-Conditioners

pressure than R22

R407C

similar pressure as R22

(possible to design

large equipment)

Zeotropic refrigerant

(handle with care)

Large Air-Conditioners

*

05-07

OIL

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

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

fully than the conventional lubricating oils.

CAUTION

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

2, 3-WAY VALVE

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

CAUTION

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

CAUTION

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

6-5. DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS

06-08

Check Valve

Other Piping

CAUTION

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

• Review materials
Change shape of pipe ends to increase pressure resistance strength.

•

•

Review the water, contaminants controlling level.
Review thickness of pipes.

•

CAUTION

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

7 . TROUBLE SHOOTING

R410A

Large Ceiling type

INVERTER

07-01

The OPERATION, TIMER and FILTER lamps operate as follows according to the error contents.

Error display

OPERATION TIMER

FILTER

(GREEN) (ORANGE)

(RED)

Error contents

:

0.5s ON / 0.5s OFF (Flash)

:

OFF

Indoor heat exchanger temperature
sensor error

Outdoor heat exchanger temperature
sensor(outlet) error

Outdoor discharge pipe temperature
sensor error

Compressor temperature sensor error

Outdoor temperature sensor error

Communication error
(Serial reverse transfer error)

Outdoor communication signal error
(Forward transfer signal error)

Trouble
shooting

Room temperature thermistor error

2

3

1

12

24

25

4

13

14

21

15

18

19

11

9

22

27

5

7

8

Discharge temperature error

Indoor fan motor abnormal

Outdoor unit fan motor error

Pressure switch error

Communication error

(Main PCB Display PCB)

Communication error

(Main PCB Display PCB)

IPM error

Compressor rotor location cannot detect

(permanent stop)

Compressor temperature error

Indoor manual auto switch error

Exessive high pressure protection on cooling

8 times

Communication error

(indoor unit remote control)

6 times

2 times

2 times

Water drain abnormal

6

6 times

2 times

3 times

2 times

2 times

3 times

3 times3 times

4 times3 times

2 times

4 times

2 times5 times

5 times5 times

6 times5 times

2 times7 times

3 times7 times

5 times7 times

28

4-way valve error

4 times7 times

6 times7 times

10

Indoor EEPROM abnormal (Model No.)

Continuous
blink

Continuous
blink

Continuous
blink

6 times

8 times

3 times

7 times

2 times
3 times

2 times
3 times

17

Active filter module (AFM) error

8 times

2 times
3 times

4 times
5 times

7. TROUBLESHOOTING

7-1 ERROR DISPLAY

7-1-1 INDOOR UNIT DISPLAY

07-02

When "EE" in Temperature Display is displayed, inspection of the air conditioning system is necessary.
Please consult authoilzed servise personnel.

Error code

Error contents

Trouble
shooting

Communication error (Serial reverse transfer error)

Room temperature sensor error

Indoor heat exchanger temperature sensor error

Outdoor heat exchanger temperature sensor(outlet) error

Water drain abnormal

Outdoor temperature sensor error

Outdoor discharge pipe temperature sensor error

Discharge temperature error

Indoor fan motor abnormal

Outdoor unit fan motor error

Outdoor communication signal error (Forward transfer signal error)

7-1-2 WIRED REMOTE CONTROLLER DISPLAY

Pressure switch error

Active filter module (AFM) error

Communication error (indoor unit remote control)

Communication error (Main PCB Display PCB)

Communication error (Main PCB Display PCB)

IPM error

Compressor rotor location cannot detect (permanent stop)

Compressor temperature sensor error

Compressor temperature error

1. SELF - DIAGNOSIS

1
2

5
6
7

8

10
11

12
13
14

15
17

18
19
21
22
23
24

25
27

Indoor manual auto switch error

Exessive high pressure protection on cooling

PFC circuit error

3
4

SU MOTUWETH FR SA

Unit number (usually 0)

Error code

ex. Self-diagnosis check

Indoor EEPROM abnormal (Model No.)

9

If “CO” appears in the unit number display, there is a remote controller error.
Refer to the installation instruction sheet included with the remote controller.

28

4-way valve error

07-03

2. ERROR CODE HISTORY DISPLAY

Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller.

1. Stop the air conditioner operation.

2. Press the SET TEMPERATURE buttons , simultaneously for 3 seconds
or more to start the self-diagnosis.

4. Press the SET TEMPERATURE buttons , simultaneously for 3 seconds or more
or there is no key input for 60 seconds to stop the display.

3. Press the SET TEMPERATURE button to select the error history number.

SU MOTU WETH FR SA

Error code

Error history number

0 1 2 3 4 5 6 7
F E d c b A 9 8





Lower

Raise

07-04

Active filter module (AFM) error

Operation LED Blinking Pattern

Normal operation OFF

5sec ON / 1sec OFF

0.5sec ON / 0.5sec OFF

0.1sec ON / 2sec OFF

0.1sec ON / 0.1sec OFF

5sec ON / 5sec OFF

5sec ON / 0.1sec OFF

Continuously lighting

Protected operation

1sec ON / 1sec OFF

Pump down operation

1. ERROR DISPLAY

7-1-3 OUTDOOR UNIT DISPLAY

Discharge temperature error

Outdoor unit fan motor error

19

Error contents

LED Flashing Pattern

Trouble
shooting

Outdoor unit sensor error

IPM error

Compressor rotor location cannot detect

15

9

5,7,8

17

18,30

2. NORMAL OPERATION DISPLAY



Trouble shooting 1

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 2 : Check Remote Control and Controller PCB

Check Point 1 : Check the connection of terminal

OKOK

Indicate or Display:

ERROR CODE : E : 00

Outdoor Unit : No indication

Communication Error
(Indoor unit Remote control)

Indoor unit controller PCB circuit
Wired Remote Control

1. Terminal connection abnormal 2. Wired Remote Control failure 3. Controller PCB failure

After turning off the power, check & correct the followings.

Check the connection of terminal between remote control and Indoor unit,
and check if there is a disconnection of the cable.

Upon correcting the removed connector or mis-wiring, reset the power.

Check Voltage at CN14 (terminal 1-3) of Controller PCB.
(Power supply to Remote Control)

>> If it is DC12V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control
>> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Replace Controller PCB

When the indoor unit cannot receive the signal from Wired Remote
more than 10seconds after power ON, or the indoor unit cannot receive
the signal more than 1minute during normal operation.

07-05

7-2 TROUBLE SHOOTING WITH ERROR CODE

Indoor Unit : Operation LED: OFF, Timer LED: 8 times blink,
Filter LED : OFF

Trouble shooting 2

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

OK

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 01

YESYES

NO

N

L

3

2

1

WHITE

BLACK

RED

WHITE

BLACK

+

-

OK

Communication Error
(Serial Reverse Transfer Error)

Outdoor Unit Main PCB Circuit
Active Filter Module

1. Connection failure 2. External cause 3. Main PCB failure 4. Active Filter Module failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check any loose or removed connection line of
Indoor unit and Outdoor unit.

>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.

Check connection between Outdoor Unit Main PCB
and Filter PCB.
(If there is loose connector or open cable)

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

Check Point 4 : Check Serial Signal (Reverse Transfer Signal)

Check Serial Signal (Reverse Transfer Signal)

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 1 - 3.

>> If it is abnormal, Check Active Filter Module. (PARTS INFORMATION 3)

When the indoor unit cannot receive the serial signal from Outdoor unit
more than 10seconds,
then permanent stop after 20seconds.

>>If Active Filter Module is abnormal, replace it.

>>If Active Filter Module is normal, replace Main PCB.

07-06

Indoor Unit : Operation LED: OFF, Timer LED: 2 or 3 times blink,
Filter LED : OFF



Trouble shooting 3
INDOOR UNIT Error Method:

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 02

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 : Check Point 2 : Remove connector and check Thermistor resistance value

Check Point 1 : Check connection of Connector

Check Point 3 : Check Point 3 : Check voltage of Controller PCB (DC5.0V)

6.51

35°C

8.04

30°C

10.012.515.820.225.933.6Resistance Value (k )

25°C20°C15°C10°C5°C0°C

Temperature

OK

OK

3.594.355.30Resistance Value (k )

50°C45°C40°C

Temperature

THERMISTOR
(PIPE TEMP.)

THERMISTOR
(ROOM TEMP.)

BLACK

BLACK

BLACK

BLACK

CN5 CN7 CN8

1 2 1 2
1 2

1 1
2 2

1 2

Room Temperature Sensor Error

Indoor Unit Controller PCB Circuit
Room Temperature Thermistor

When Room Temperature Thermistor open or short-circuit is
detected at power ON.

1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Thermistor Characteristics (Approx. value)

If Thermistor is either open or shorted, replace it and reset the power.

Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor (DC5.0V)

If the voltage does not appear, replace Controller PCB.

07-07

1 2

Indoor Unit : Operation LED: 2 times blink, Timer LED: 2 times blink,
Filter LED : OFF

GRAY
GRAY



Trouble shooting 4

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 04

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

31.7

35°C

39.6

30°C

49.762.980.3103134176Resistance Value (k )

25°C20°C15°C10°C5°C0°C

Temperature

OKOK

OK

17.120.825.6Resistance Value (k )

50°C45°C40°C

Temperature

Indoor Heat Exchanger Temperature
Sensor Error

Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor

When Heat Exchanger Temperature Thermistor open or short-circuit is
detected at power ON.

1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor (DC5.0V)

If the voltage does not appear, replace Controller PCB.

07-08

THERMISTOR
(PIPE TEMP.)

THERMISTOR
(ROOM TEMP.)

BLACK

BLACK

BLACK

BLACK

CN5 CN7 CN8

1 2 1 2
1 2 1 21 2

Indoor Unit : Operation LED: 2 times blink, Timer LED: 3 times blink,
Filter LED : OFF

1 1
2 2

GRAY
GRAY



Trouble shooting 5
OUTDOOR UNIT Error Method:

Indicate or Display:

Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF
ERROR CODE : E : 06

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

4.77

25°C

5.98

20°C

7.569.6312.416.121.027.8Resistance Value (k )

15°C10°C5°C0°C-5°C-10°C

Temperature

OKOK

OKOK

DC

3.84

30°C

0.446

90°C

0.606

80°C

0.8401.191.712.082.533.11Resistance Value (k )

70°C60°C50°C45°C40°C35°C

Temperature

0.333

100°C

THERMISTOR

(DISCHARGE)

THERMISTOR

(COMPRESSOR)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

BLACK

BLUE

CN64 CN62 CN65 CN63

3 2 1

BROWN

BROWN

Outdoor Heat Exchanger Temperature
Sensor (Outlet) Error

Outdoor Unit Main PCB Circuit
Heat Exchanger Temperature
Thermistor (Outlet)

When Heat Exchanger Temperature Thermistor (Outlet) open or
short-circuit is detected at power ON or while running the compressor.

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)

If the voltage does not appear, replace Main PCB.

07-09

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

Indoor Unit : Operation LED: 3 times blink, Timer LED: 3 times blink,
Filter LED : OFF



Check Point 2 : Check Point 2 : Check Connector (CN15) / Wire

Check Point 1 : Check Float Switch

Check Point 3 : Replace Controller PCB

ONON OFFOFF

OKOK

OKOK

Trouble shooting 6
INDOOR UNIT Error Method:

Indicate or Display:

Outdoor Unit : No indication

ERROR CODE : E : 09

Detective Actuators:

Detective details:

Forecast of Cause :

Water Drain Abnormal

Indoor Unit Controller PCB Circuit
Float Switch

When Float Switch is ON for more than 3 minutes.

1. Float Switch failure 2. Shorted connector/ wire 3. Controller PCB failure

Check operation of float switch. (any blocking by dust, etc.)

Remove Float switch and check ON/OFF switching operation
by using a meter.

>>If Float switch is detective, replace it.

Check loose contact of CN15 /shorted wire (pinched wire).

>>Replace Float switch if the wire is abnormal

If Check Point 1 & 2 do not improve the symptom, change Controller PCB.

07-10

Indoor Unit : Operation LED: 2 times blink, Timer LED: 6 times blink,
Filter LED : OFF



Trouble shooting 7
OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 0A

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

OKOK

30°C

12.620.726.935.246.662.3115Resistance Value (k )

20°C

16.1

15°C10°C5°C0°C-20°C -10°C -5°C

Temperature

3.45 2.36 1.65Resistance Value (k )

50°C 60°C 70°C

5.187.97

40°C

Temperature

Outdoor Temperature Sensor Error

Outdoor Unit Main PCB Circuit
Outdoor Temperature Thermistor

When Outdoor Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)

If the voltage does not appear, replace Main PCB.

07-11

Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF

Indoor Unit : Operation LED: 3 times blink, Timer LED: 4 times blink,
Filter LED : OFF

THERMISTOR

(DISCHARGE)

THERMISTOR

(COMPRESSOR)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

BLACK

BLUE

CN64 CN62 CN65 CN63

3 2 1

BROWN

BROWN

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1





Trouble shooting 8
OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 0C

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

17.826.3

20°C

40.062.679.1101130169Resistance Value (k )

15°C10°C5°C0°C

Temperature

OKOK

OKOK

12.3

30°C

50°C40°C

60°C

1.222.003.434.606.278.70Resistance Value (k )

140°C120°C100°C90°C80°C70°C

Temperature

Outdoor Discharge Pipe Temperature
Sensor Error

Outdoor Unit Main PCB Circuit
Discharge Pipe Temperature Thermistor

When Discharge Pipe Temperature Thermistor open or short-circuit
is detected at power ON or while running the compressor.

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)

If the voltage does not appear, replace Main PCB.

07-12

Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF

Indoor Unit : Operation LED: 3 times blink, Timer LED: 2 times blink,
Filter LED : OFF

THERMISTOR

(DISCHARGE)

THERMISTOR

(COMPRESSOR)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

BLACK

BLUE

CN64 CN62 CN65 CN63

3 2 1

BROWN

BROWN

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1



Trouble shooting 9

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 0F

Detective Actuators:

Detective details:

Forecast of Cause :

Discharge temperature error

Outdoor Unit Main PCB Circuit
Discharge Pipe Temperature Thermistor

07-13

Outdoor Unit : LED continuously lighting

When the discharge temperature becomes higher than 110°C
( AB*A36L and 45L is 115°C ), the compressor stops.
After the compressor restarts, if the same operation is repeated,
the compressor stops permanently.

Check Point 1 : Check if Gas Valve is open

If it is not open, open it and check the operation.

Check Point 3 : Check if gas leak or less gas

Measure Gas pressure, if there is a leak, correct it.

>>If recharging refrigerant, make sure to perform
vacuuming and recharge the specified amount.

Check Point 5 : Check Outdoor FAN, Heat Exchanger

Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
Is the Fan rotating? (Check by hand and if it is locked, replace the motor)
Check Outdoor Fan Motor.

>>If the Fan Motor is defective, replace it.

Check Point 4 : Check Discharge Thermistor

Isn’t it fallen off the holder?
Is there a cable pinched?

>> Check characteristics of thermistor (Refer to Trouble shooting 8),
If defective, replace the thermistor

Check Point 2 : Check EEV and Strainer

Are EEV and Strainer open?
(Refer to PARTS INFORMATION 4)

>>If EEV or Strainer is defective, replace it.

OK OK

OK

OK

OK

OK

MPa MPa

1. Valve is close 2. EEV failure 3. Gas Leak, less 4. Discharge Thermistor failure

5. Outdoor Fan Operation failure 6. Outdoor Heat Exchanger clogged

< Cooling mode >

< Heating mode >

Check Point 1 : Check if LIquid Valve is open

If it is not open, open it and check the operation.

Check Point 2 : Check EEV and Strainer

Are EEV and Strainer open?
(Refer to PARTS INFORMATION 4)

>>If EEV or Strainer is defective, replace it.

Indoor Unit : Operation LED: 7 times blink, Timer LED: 2 times blink,
Filter LED : OFF



Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 3 : Replace Controller PCB

Check Point 2 :
Check Indoor Unit electric components

YESYES

NO

Trouble shooting 10

INDOOR UNIT Error Method:

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 11

Indoor EEPROM abnormal
(Model No.)

Indoor Unit Controller PCB circuit

1. External cause 2. Defective connection of electric components 3. Controller PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

Check Point 1-2 :
Check external cause at Indoor and Outdoor
(Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus
in the same circuit.

Momentary power failure : Check if there is a defective contact
or leak current in the power supply
circuit.

Noise : Check if there is any equipment causing harmonic
wave near electric line.(Neon bulb or electric
equipment that may cause harmonic wave)
Check the complete insulation of grounding.

Note : EEPROM

EEPROM(Electronically Erasable and
Programmable Read Only Memory) is a non­volatile memory which keeps memorized
information even if power is turned off. It can
change the contents electronically.
To change the contents, it uses higher
voltage than normal, and it can not change a
partial contents. (Rewriting shall be done
upon erasing the all contents.)
There is a limit in a number of rewriting.

Change Controller PCB.

Check all connectors.
(loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

When the model information being read from EEPROM has
an apparent error.

07-14

Indoor Unit : Operation LED: Blink, Timer LED: Blink,
Filter LED : Blink



Trouble shooting 11

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 1 : Check rotation of Fan

Check Point 2 : Check ambient temp. around motor

OK

OK

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 12

Indoor Fan Motor abnormal

Indoor Unit Controller PCB Circuit
Indoor Fan Motor

1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise

4. Control PCB failure

Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

When the condition that actual frequency of Indoor Fan is
below 1/3 of target frequency is continued more than 56 seconds.

07-15

Check Point 3 : Replace Controller PCB

If Check Point 1- 2 do not improve the symptom, replace Controller PCB.

Indoor Unit : Operation LED: 6 times blink, Timer LED: 2, 3 times blink,
Filter LED : OFF



Trouble shooting 12

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 2 : Check Connection

OK

Indicate or Display:

ERROR CODE : E : 13

Check Point 3 : Check the voltage of power supply

Check Point 1-1 : Reset the power

YESYES

NO

Check Point 1-2:

N

L

3

2

1

WHITE

BLACK

RED

WHITE

BLACK

+

-

OK

Check Point 4 : Check Serial Signal (Forward Transfer Signal)

Check Serial Signal (Forward Transfer Signal)

Outdoor Communication Signal Error
(Forward Transfer Signal Error)

Indoor Unit Controller PCB Circuit

1. Connection failure 2. External cause 3. Controller PCB failure

Does Error indication reappear?

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).

Check the voltage of power supply

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 2 - 3.

Check any loose or removed connection line of
Indoor unit and Outdoor unit.

>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.

Check connection between Indoor Unit Controller PCB
and Filter PCB.
(If there is loose connector or open cable)

>> If it is abnormal, Controller PCB is failure. >> Replace Controller PCB

07-16

When the outdoor unit cannot receive the serial signal from Indoor unit
more than 10seconds.

Outdoor Unit : No indication

Indoor Unit : Operation LED: OFF, Timer LED: 4, 5 times blink,
Filter LED : OFF



Trouble shooting 13
OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 15

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

OKOK

Compressor Temperature Sensor Error

Outdoor Unit Main PCB Circuit
Compressor Temperature Thermistor

When Compressor Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.

1. Connector connection failure 2. Thermistor failure 3. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)

If the voltage does not appear, replace Main PCB.

07-17

Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF

17.826.3

20°C

40.062.679.1101130169Resistance Value (k )

15°C10°C5°C0°C

Temperature

12.3

30°C

50°C40°C

60°C

1.222.003.434.606.278.70Resistance Value (k )

140°C120°C100°C

90°C80°C70°C

Temperature

Indoor Unit : Operation LED: 3 times blink, Timer LED: 8 times blink,
Filter LED : OFF

THERMISTOR

(DISCHARGE)

THERMISTOR

(COMPRESSOR)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

BLACK

BLUE

CN64 CN62 CN65 CN63

3 2 1

BROWN

BROWN

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1

3 2 1



Trouble shooting 14
OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 16

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Point 2 : Check voltage of Main PCB (DC5.0V)

HIGH PRESSURE SW

RED
RED

CN90

212

1

OK

Check Point 1 : Reset Power Supply and operate

Check Point 3 : Check Pressure Switch

YES

NONO

OK

Pressure Switch Error

Outdoor Unit Main PCB Circuit
Pressure Switch

1. Connector connection failure 2. Pressure Switch failure 3. Main PCB failure

When pressure switch open is detected in 10 seconds
after the power is turned on.

Does abnormal LED indication show again?

Make sure circuit diagram of outdoor unit and check terminal voltage
at Pressure Switch. (DC5.0V)

If the voltage does not appear, replace Main PCB.

Check if connector is loose or cable is open.

>> If no abnormal connection is found,
replace Pressure Switch.

After replacing Pressure Switch, check operating
condition and pressure in operation.

Check Point 4 : Check High Pressure Protection on cooling

Check Excessive high pressure protection on cooling.
(Refer to Trouble shooting 22)

07-18

Outdoor Unit : No indication

Indoor Unit : Operation LED: 7 times blink, Timer LED: 5 times blink,
Filter LED : OFF



Trouble shooting 15

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Outdoor Fan

OK

OK

Indicate or Display:

ERROR CODE : E : 17

Check Point 5 : Replace Main PCB

OKOK

OKOK

Check Point 1 : Check connections of Outdoor Unit Electrical Components

IPM error (Permanent Stop)

Outdoor Unit Main PCB Circuit
Compressor

1. Defective connection of electric components 2. Outdoor Fan Operation failure

3. Outdoor Heat Exchanger clogged 4. Compressor failure 5. Main PCB failure

Check if connector is removed.

Check if the terminal connection is loose.

Check erroneous connection.
Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Check Outdoor Fan, Heat Exchanger

Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?

Is the Fan rotating by hand when operation is off ?

>> If the Fan Motor is locked, replace it.

Check Outdoor Fan Motor. (Refer to Trouble shooting 19)

>> If the Fan Motor is failure, replace it.

Check Point 4 : Check Compressor

(PARTS INFORMATION 2)

Check Compressor.

If Check Point 1 4 do not improve the symptom, change Main PCB.

When more than normal operating current to IPM in Main PCB flows,
the compressor stops.
After the compressor restarts, if the same operation is repeated within 40sec,
the compressor stops again.
If and repeats 5 times, the compressor stops permanently.

07-19

Outdoor Unit : LED 0.5sec ON/ 0.5sec OFF

Indoor Unit : Operation LED: 5 times blink, Timer LED: 2 times blink,
Filter LED : OFF

Trouble shooting 17
OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 19

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Active Filter Module

OKOK

OKOK

OKOK

Active Filter Module (AFM) error

Outdoor Unit Main PCB Circuit
Active Filter Module

1. External cause 2. Connector connection failure 3. Active Filter Module failure ４. Main PCB failure

Check Point 2 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Active Filter Module. (PARTS INFORMATION 3)

>>If Active Filter Module is abnormal, replace it.

Check Point 4 : Replace Main PCB

If Check Point 1 3 do not improve the symptom, change Main PCB.

Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current
in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.

07-20

When inverter input DC voltage is higher than 425V or
lower than 80V.
When a momentary power cut off occurred on low voltage.

Indoor Unit : Operation LED: 8 times blink, Timer LED: 2, 3 times blink,
Filter LED : OFF

Outdoor Unit : LED 5sec ON/ 0.1sec OFF



Trouble shooting 18

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 : Check connection of around the Compressor components

OKOK

OKOK

Indicate or Display:

ERROR CODE : E : 1A

Check Point 3: Replace Main PCB

Outdoor Unit Main PCB Circuit
Compressor

Compressor rotor location cannot detect
(Permanent Stop)

1. Defective connection of electric components 2. Main PCB failure 3. Compressor failure

If Check Point 1,2 do not improve the symptom, change Main PCB.

Check if connector is removed.

Check erroneous connection.
Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

(Refer to PARTS INFORMATION 2)

For Compressor Terminal, Main PCB

While running the compressor, if the detected rotor location is out of
phase with actual rotor location more than 90 degrees,
the compressor stops.
After the compressor restarts, if the same operation is repeated
within 40sec, the compressor stops again.
If and repeats 5 times, the compressor stops permanently.

07-21

Check Point 1 : Check Noise from Compressor

Turn on Power and check operation noise.

If an abnormal noise show, replace Compressor.

Outdoor Unit : LED 0.1sec ON/ 2sec OFF

Indoor Unit : Operation LED: 5 times blink, Timer LED: 5 times blink,
Filter LED : OFF



Trouble shooting 19

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 2 : Check ambient temp. around motor

OK

OK

Indicate or Display:

ERROR CODE : E : 1b

Outdoor Unit Fan Motor Error

Outdoor Unit Main PCB Circuit
Outdoor Fan Motor

1. Fan rotation failure 2. Motor protection by surrounding temperature rise 3. Main PCB failure

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Output Voltage of Main PCB

Check outdoor unit circuit diagram and the voltage.
(Measure at Main PCB side connector)

If the voltage is not correct, replace Main PCB.

When outdoor fan rotation speed is less than 100rpm in 20 seconds
after fan motor starts, fan motor stops.
After fan motor restarts, if the same operation within 60sec is repeated
3 times in a row, compressor and fan motor stops.
If and repeats 5 times in a row, compressor and fan motor stops
permanently.

Read wire DC voltage

Red - Black

White - Black

300 400V

15 1.5V

07-22

CN801

6
5
4
3
2
1

BLACK

WHITE

YELLOW

BROWN

RED

FM

FAN MOTOR

Outdoor Unit : LED 5sec ON/ 5sec OFF

Indoor Unit : Operation LED: 5 times blink, Timer LED: 6 times blink,
Filter LED : OFF



07-23

Outdoor Unit : No indication
ERROR CODE : E : 20

Trouble shooting 21
INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

Indoor manual auto switch error

Indoor Unit Controller PCB Circuit
Forced auto switch

When the Forced auto switch becomes ON for 30 consecutive seconds.

1. Forced auto switch failure 2.Controller PCB failure

Check Point 1 : Check the Forced auto switch

Check if Forced auto switch is kept pressed.

Check Point 2 : Replace Controller PCB

If Check Point 1 do not improve the symptom, change Controller PCB.

Check ON/OFF switching operation by using a meter.

>>If Forced auto switch is detective, replace it.

Indoor Unit : Operation LED: 4 times blink, Timer LED: 2 times blink,
Filter LED : OFF

Trouble shooting 22

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Outdoor Fan

OK

OK

Indicate or Display:

OKOK

OKOK

Check Point 1 : Check connections of Outdoor Unit Electrical Components

Excessive high pressure protection
on cooling

1. Defective connection of electric components 2. Outdoor Fan Operation failure

3. Outdoor Heat Exchanger clogged 4. Thermistor failure 5. EEV failure 6. Main PCB failure

Check if connector is removed.

Check if the terminal connection is loose.

Check erroneous connection.
Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 2 : Check Outdoor Fan, Heat Exchanger

Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?

Is the Fan rotating by hand when operation is off ?

>> If the Fan Motor is locked, replace it.

Check Outdoor Fan Motor. (Refer to Trouble shooting 19)

>> If the Fan Motor is failure, replace it.

Check Thermistor. (Refer to Trouble shooting 5)

>> If the Thermistor is failure, replace it.

Check Point 5 : Check Electronic Expansion Valve

Check Point 4 : Check Thermistor

(PARTS INFORMATION 4)

Check EEV.

Excessive high pressure protection on cooling mode has been
activated.

07-24

Check Point 6 : Replace Main PCB

OKOK

If Check Point 1 5 do not improve the symptom, change Main PCB.

Outdoor Unit : No indication
ERROR CODE : E : 24

Outdoor Unit Main PCB Circuit
Outdoor Fan Motor
Heat Exchanger Temp. Thermistor
Outdoor unit Electronic Expansion Valve

Indoor Unit : Operation LED: 7 times blink, Timer LED: 3 times blink,
Filter LED : OFF



Trouble shooting 23
OUTDOOR UNIT Error Method:

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 25

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

OKOK

PFC circuit error

Outdoor Unit Main PCB Circuit

1. External cause 2. Connector connection failure 3. Main PCB failure

Check Point 2 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 3 : Replace Main PCB

If Check Point 1, 2 do not improve the symptom, change Main PCB.

Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current
in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.

07-25

When inverter output DC voltage is higher than 425V for over 3 seconds,
the compressor stops.
If the same operation is repeated 5 times, the compressor stops permanently.

Indoor Unit : Operation LED: 8 times blink, Timer LED: 4 times blink,
Filter LED : OFF



Trouble shooting 24

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

OK

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 26

YESYES

NO

Communication Error
(Main PCB ---> Display PCB)

Indoor Unit Main PCB Circuit
Display PCB

1. Connection failure 2. External cause 3. Display PCB failure 4. Main PCB failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check connection between Main PCB and
Display PCB.
(If there is loose connector or open cable)

Check Point 3 : Replace Display PCB

>> If Check Point 1, 2 do not improve the symptom, change Display PCB.
(If the symptom does not change, replace Main PCB.)

When the Display PCB cannot receive the signal from the Main PCB.

07-26

Indoor Unit : Operation LED: OFF, Timer LED: 6 times blink,
Filter LED : OFF



Trouble shooting 25

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

OK

Indicate or Display:

Outdoor Unit : No indication
ERROR CODE : E : 27

YESYES

NO

Communication Error
(Main PCB <--- Display PCB)

Indoor Unit Main PCB Circuit
Display PCB

1. Connection failure 2. External cause 3. Display PCB failure 4. Main PCB failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check connection between Main PCB and
Display PCB.
(If there is loose connector or open cable)

Check Point 3 : Replace Display PCB

>> If Check Point 1, 2 do not improve the symptom, change Display PCB.
(If the symptom does not change, replace Main PCB.)

When the Main PCB cannot receive the signal from the Display PCB.

07-27

Indoor Unit : Operation LED: OFF, Timer LED: 7 times blink,
Filter LED : OFF

Trouble shooting 27
OUTDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 2b

Detective Actuators:

Detective details:

Forecast of Cause :

Compressor temperature error

Outdoor Unit Main PCB Circuit
Compressor Temperature Thermistor

07-28

Outdoor Unit : No indication

When the compressor temperature becomes higher than 110°C,
the compressor stops.
After the compressor restarts, if the same operation is repeated,
the compressor stops permanently.

Check Point 1 : Check if Gas Valve is open

If it is not open, open it and check the operation.

Check Point 3 : Check if gas leak or less gas

Measure Gas pressure, if there is a leak, correct it.

>>If recharging refrigerant, make sure to perform
vacuuming and recharge the specified amount.

Check Point 5 : Check Outdoor FAN, Heat Exchanger

Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
Is the Fan rotating? (Check by hand and if it is locked, replace the motor)
Check Outdoor Fan Motor.

>>If the Fan Motor is defective, replace it.

Check Point 4 : Check Compressor Thermistor

Isn’t it fallen off the holder?
Is there a cable pinched?

>> Check characteristics of thermistor (Refer to Trouble shooting 13),
If defective, replace the thermistor

Check Point 2 : Check EEV and Strainer

Are EEV and Strainer open?
(Refer to PARTS INFORMATION 4)

>>If EEV or Strainer is defective, replace it.

OK OK

OK

OK

OK

OK

MPa MPa

1. Valve is close 2. EEV failure 3. Gas Leak, less 4. Compressor Thermistor failure

5. Outdoor Fan Operation failure 6. Outdoor Heat Exchanger clogged

< Cooling mode >

< Heating mode >

Check Point 1 : Check if LIquid Valve is open

If it is not open, open it and check the operation.

Check Point 2 : Check EEV and Strainer

Are EEV and Strainer open?
(Refer to PARTS INFORMATION 4)

>>If EEV or Strainer is defective, replace it.

Indoor Unit : Operation LED: 7 times blink, Timer LED: 6 times blink,
Filter LED : OFF



Trouble shooting 28
INDOOR UNIT Error Method:

Indicate or Display:

ERROR CODE : E : 2c

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

OKOK

4-way valve error

Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
Room Temperature Thermistor
4-way valve

When the indoor heat exchanger temperature is compared with
the room temperature, and either following condition is detected
continuously two times, the compressor stops.

1. Connector connection failure 2. Thermistor failure 3. Coil failure 4. 4-way valve failure

5. Controller PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.
Check if thermistor cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 3 : Check the solenoid coil and 4-way valve

Remove CN500 from PCB and check the resistance value of coil.
Resistance value is about 1.4k

>>If it is Open or abnormal resistance value, replace Solenoid Coil.

07-29

Outdoor Unit : No indication

Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 10degC

Heating operation
[indoor heat exchanger temp.] - [Room temp.] < -10degC

If the same operation is repeated 5 times,
the compressor stops permanently.

[ Solenoid coil ]

Check each piping temperature,
and the location of the valve by the temperature difference.

>>If the value location is not proper, replace 4-way valve.

[ 4-way valve ]

OKOK

Check Point 4 : Replace Controller PCB

If Check Point 1- 3 do not improve the symptom, replace Controller PCB.

Check Point 2 : Check Heat exchanger temp. thermistor and Room temp. thermistor

Isn’t it fallen off the holder?
Is there a cable pinched?

>> Check characteristics of thermistor (Refer to Trouble shooting 3, 4),
If defective, replace the thermistor

Indoor Unit : Operation LED: 7 times blink, Timer LED: 4 times blink,
Filter LED : OFF



Trouble shooting 30

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Indicate or Display:

Compressor Start-up error
(Permanent Stop)

On start-up the compressor, when detected rotor position is out of phase
with actual rotor position more than 90 degrees,the compressor stops.
After the compressor restarts, if the same operation is repeated
within 40sec, the compressor stops again.
If and repeats 5 times, the compressor stops permanently.

Outdoor Unit Main PCB Circuit
Compressor

1. Defective connection of electric components 2. Main PCB failure 3. Compressor failure

Check Point 2 : Check connection of around the Compressor components

OKOK

OKOK

Check Point 3 : Replace Main PCB

If Check Point 1,2 do not improve the symptom, replace Main PCB.

Check if connector is removed.

Check erroneous connection.
Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

(Refer to PARTS INFORMATION 2)

For Compressor Terminal, Main PCB

07-30

Check Point 1 : Check Noise from Compressor

Turn on Power and check operation noise.

If an abnormal noise show, replace Compressor.

ERROR CODE : E : 1A

Outdoor Unit : LED 0.1sec ON/ 2sec OFF

Indoor Unit : Operation LED: 5 times blink, Timer LED: 5 times blink,
Filter LED : OFF



Trouble shooting 31

Forecast of Cause:

YESYES

NO

OKOK

OKOK

OKOK

Indoor Unit - No Power

1. Power Supply failure 2. External cause

3. Electrical Components defective

Check Point 1 : Check Installation Condition

Isn’t the breaker down?
Check loose or removed connection cable.

>>If abnormal condition is found, correct it by referring
to Installation Manual or Data & Technical Manual.

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit.

Momentary power failure ----- Check if there is a defective contact or leak current in
the power supply circuit.

Noise ----- Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.

Check Point 3 : Check Electrical Components

Check Voltage of power supply.

>> Check AC198 - 264V appears at Indoor Unit Terminal 1 - 2 (Power Supply).

Check Fuse in Filter PCB.

>> If Fuse is open, check if the wiring between Terminal and Filter PCB
is loose, and replace Fuse.

Check Varistor in Filter PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power supply and replace Varistor.

If the symptom does not change by above Check3, replace Filter PCB.

07-31

7-3 TROUBLE SHOOTING WITH NO ERROR CODE



Trouble shooting 32

Forecast of Cause:

Check Point 3 : Check Electrical Components

OKOK

OKOK

YESYES

OK

NO

Check Point 1 : Check Installation Condition

Outdoor Unit - No Power

1. Power Supply failure 2. External cause

3. Electrical Components defective

Isn’t the breaker down?
Check loose or removed connection cable.

>>If abnormal condition is found, correct it by referring
to Installation Manual or Data & Technical Manual.

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit.

Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.

Noise ----- Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.

Check the voltage of power supply.

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse in Main PCB.

>> If Fuse is open, check loose terminal or removed connector (CN1) , and replace Fuse.

Check Varistor in Main PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power supply and replace Varistor.
Upon checking the normal power supply, replace Varistor.

If the symptom does not change by above Check 3, replace Main PCB.

Check Active Filter Module. (PARTS INFORMATION 3)
>>If Active Filter Module is abnormal, replace it.

07-32



Trouble shooting 33

Forecast of Cause:

Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Check Point 1 : Check indoor and outdoor installation condition

Check Point 3 : Check Electrical Components at Indoor and Outdoor

OK

OK

OKOK

No Operation (Power is ON)

1. Setting/ Connection failure 2. External cause

3. Electrical Component defective

Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control, or terminals between Indoor Units.
Or, check if there is an open cable connection.
Are these Indoor Unit, Outdoor Unit, and Remote Control suitable model numbers to connect?

>> If there is some abnormal condition, correct it by referring to Installation manual and
Data & Technical Manual.

Turn off Power and check/ correct followings.

Is there loose or removed communication line of Indoor Unit and Outdoor Unit?

Instant drop ----- Check if there is a large load electric apparatus in the same circuit.

Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.

Noise ----- Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.

>> If it is DC12V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control
>> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Replace Controller PCB

>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit.

07-33

Check Voltage at CN14 of Controller PCB.
(Power supply to Remote Control)



Attention

Trouble shooting 34

Forecast of Cause:

Check Point 2 : Check Outdoor Unit Operation

Check Point 1 : Check Indoor Unit

Check Point 3 : Check Site Condition

Check Point 5 : Check Refrigeration Cycle

Check Point 4 :
Check Indoor/ Outdoor Installation Condition

Pipe (In) Pipe (Out)

Pipe (In) Pipe (Out)

OKOK

OKOK

OKOK

OKOK

MPa MPa

No Cooling / No Heating

1. Indoor Unit error 2. Outdoor Unit error

3. Effect by Surrounding environment

4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure

Does Indoor Unit FAN run on HIGH FAN?

Is Air Filter dirty?
Is Heat Exchanger clogged?
Check if Energy save function is operated.

Check if Outdoor Unit is operating
(If not, refer to Trouble shooting 32)

Check any objects that obstruct the air flow route.

Check clogged Heat Exchanger.

Is the Valve open?

Is capacity of Indoor Unit fitted to Room size?

Any windows open? Or direct sunlight ?

Check connection pipe
(specified pipe length & Pipe diameter?)

Check any loose or removed communication line.

>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data & Technical
Manual.

Check if Strainer is clogged (Refer to the figure at right).

Measure Gas Pressure and if there is a leakage, correct it.

>> When recharging the refrigerant, make sure to perform
vacuuming, and recharge the specified amount.

Check EEV (PARTS INFORMATION 4)

Check Compressor (PARTS INFORMATION 1,2)

Strainer normally does not have temperature difference
between inlet and outlet as shown in , but if there is a
difference like shown in , there is a possibility of inside
clogged. In this case, replace Strainer.

07-34



Trouble shooting 35

Forecast of Cause :

Trouble shooting 36

Forecast of Cause:

OK

OK

OK

OK

OKOK

OKOK

OKOK

MPa MPa

Abnormal Noise

1. Abnormal installation (Indoor/ Outdoor) 2. Fan failure(Indoor/ Outdoor)

3. Compressor failure (Outdoor)

Diagnosis method when Abnormal Noise is occurred

Abnormal noise is coming from Indoor Unit.
(Check and correct followings)

Abnormal noise is coming from Outdoor Unit.
(Check and correct followings)

Is Fan broken or deformed?
Is the screw of Fan loose?
Is there any object which obstruct the Fan rotation?

Is Main Unit installed in stable condition?
Is the installation of Air suction grille and
front panel normal?

Is Fan broken or deformed?
Is the screw of Fan loose?
Is there any object which obstruct the Fan rotation?

Is Main Unit installed in stable condition?
Is Fan Guard installed normally?

Check if vibration noise by loose bolt or contact noise
of piping is happening.

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

Water Leaking

1. Erroneous installation 2. Drain hose failure

Diagnosis method when water is spitting out.

Is the filter clogged?

Check Gas Pressure and correct it
if there was a gas leak.

Diagnosis method when water leak occurs

Is Drain Hose connection loose?
Is there a trap in Drain Hose?
Is Drain Hose clogged?

Is Main Unit installed in stable condition?
Is Main Unit broken or deformed at the time of
transportation or maintenance?

Is Fan rotating?

07-35



SERVICE PARTS INFORMATION 1

MPa MPa

Compressor

Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting )

Does not start up

Is there open or loose connection
cable?

Check Filter PCB, Main PCB,
connection of Compressor,and winding
resistance. (Refer to the next page).

Check Filter PCB, Main PCB,
connection of Compressor,and winding
resistance. (Refer to the next page).

>> If there is no failure, the defect of
Compressor is considered (Locked
compressor due to clogged dirt or
less oil)

Replace Compressor

Replace Compressor

Replace Compressor

Stops soon after starting up

Is there open or loose connection
cable?

Is Gas Pipe Valve open?
(Low Pressure is too low)

Check if Refrigerant is leaking.
(Recharge Refrigerant)

Check if Strainer is clogged.
(PARTS INFORMATION 4)

>> If there is no failure, the defect of Compressor can be
considered. (Compression part broken or valve defective.)

Abnormal noise

Defective Compressor
can be considered.
(due to inside dirt clogging
or broken component)

Check if vibration noise by
loose bolt or contact noise
of piping is happening.

07-36

7-4 SERVICE PARTS INFORMATION



SERVICE PARTS INFORMATION 2

Inverter Compressor

07-37

Check Point 1 : Check Connection

MAIN PCB

Check Point 2 : Check Winding Resistance

Check Point 3 : Replace Main PCB

R (V)

C (W)

S (U)

W305

W304 W303

RED

WHITE

BLACK

Compressor

Check terminal connection of Compressor
(loose or incorrect wiring)

Check connection of Main PCB
(Loose or incorrect wiring)

Check winding resistance of each terminal

If the resistance value is 0 or infinite, replace Compressor.

If the symptom does not change with above Check 1, 2, replace Main PCB.

R

(RED)

S

(WHITE)

C

(BLACK)

Terminal cover opened

S- R : Resistance Value : 0.720
(U-V) ( at 20°C )

S- C : Resistance Value : 0.726
(U-W) ( at 20°C )

R- C : Resistance Value : 0.708
(V-W) ( at 20°C )



SERVICE PARTS INFORMATION 3

Active Filter Module

07-38

Check Point 1 : Check Open or Short-circuit and Diode (D1)

Check Point 2 : Check the Output DC voltage (between P and N1)

L2L1

P

N

N

Power factor control

D1

+IN

Io

Check the Output DC voltage (between P and N1) of compressor stopping and operating.

If it is abnormal,replace ACTIVE FILTER MODULE

Remove connector, check the open or short-circuit and the diode in the module

>> If the output voltage of compressor operating is less than the output voltage of compressor stopping,
Active Filter Module is detective. >> Replace Active Filter Module

Terminal

Resistance value

L2

L1

L1,L2

P

P

Control Box

N

N

(+)

(+)

( )

( )

Tester(+) Tester(-)

Check the open or short-circuit

L2

P

P

N

L2

L2

Check the diode

0

360k

720k

1.65M /

20%

+

-

360k

20%

+

-

20%

+

-

(Ref. value 1)

1.14M

(Ref. value 2)

1.01M /

(Ref. value 1)

761k

(Ref. value 2)

Terminal

Resistance value

Tester(+) Tester(-)

1.32M /

(Ref. value 1)

663k

(Ref. value 2)

1.01M /

(Ref. value 1)

762k

(Ref. value 2)

Ref. value 1
Specifications for Multimeter
Manufacturer : FLUKE
Model name : FLUKE11
Power source : DC9V.

Ref. value 2
Specifications for Multimeter
Manufacturer : Sanwa
Model name : PM3
Power source : DC3V.



-IN

SERVICE PARTS INFORMATION 4

Check Point 2 : Check Coil of EEV

Yellow - Brown

Orange - Red

Blue - Brown

White - Red

Read wire

46 4

Resistance value

Check Point 1 : Check Connections

Check Point 5 : Check Opening and Closing Operation of Valve

Check Point 3 : Check Voltage from Main PCB.

Check Point 4 : Check Noise at start up

Pipe (In)

Pipe (Out)

Hi TEMP.

Pipe (In)

Hi TEMP.

Normal TEMP.

CLOSE
Example : Hot Gas

OPEN
Example : Hot Gas

Pipe (Out)

Hi TEMP.

Pipe (In) Pipe (Out)

Pipe (In) Pipe (Out)

Check Point 6 : Check Strainer

DC

CN700

EXPANSION
VALVE COIL

EV

RED

BROWN

BLUE

ORANGE

YELLOW

WHITE

654321

at 20°C

Outdoor unit Electronic Expansion Valve
( EEV )

Check connection of connector (CN700)
( Loose connector or open cable )

Remove connector, check each winding
resistance of Coil.

If Resistance value is abnormal, replace EEV.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Turn on Power and check operation noise.

If an abnormal noise does not show, replace Main PCB.

When Valve is closed,
it has a temp. difference between Inlet and Outlet.

If it is open,
it has no temp. difference between Inlet and Outlet.

Strainer normally does not have temperature difference between inlet and outlet as shown in ,
but if there is a difference as shown in , there is a possibility of inside clogged. In this case, replace Strainer.

07-39



8 . APPENDING DATA

R410A

INVERTER

Large Ceiling type

08-01

8-1. CAPACITY TABLE

8. APPENDING DATA

COOLING CAPACITY

MODEL : AB A30LBT

MODEL : AB A36LBT

AFR : Air flow rate (m3/min)
TC : Total capacity (kW)
SHC : Sensible Heat capacity (kW)
PI : Power Input (kW)

°CDB

°CWB

TC SHC PI T C SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI

8.60 6.53 1.32 9.59 6.57 1.35 9.91 7.14 1.35 10.57 7.17 1.37 10.89 7.74 1.37 11.55 7.71 1.39 12.20 8.21 1.40

8.38 6.44 1.71 9.33 6.48 1.73 9.65 7.05 1.74 10.28 7.07 1.76 10.60 7.64 1.77 11.24 7.61 1.79 11.87 8.10 1.80

7.96 6.33 2.19 8.87 6.37 2.23 9.17 6.92 2.24 9.77 6.94 2.26 10.08 7.50 2.27 10.68 7.47 2.29 11.29 7.96 2.32

7.85 6.17 2.24 8.75 6.21 2.28 9.04 6.75 2.29 9.64 6.77 2.31 9.94 7.32 2.33 10.54 7.29 2.35 11.13 7.76 2.37

7.82 6.27 2.27 8.71 6.31 2.30 9.00 6.86 2.31 9.60 6.88 2.34 9.89 7.43 2.35 10.49 7.40 2.37 11.08 7.89 2.39

8.20 6.31 2.47 9.13 6.35 2.51 9.44 6.90 2.52 10.07 6.92 2.54 10.38 7.48 2.56 11.00 7.45 2.58 11.62 7.93 2.61

9.45 6.90 3.00 10.53 6.94 3.05 10.89 7.55 3.06 11.61 7.57 3.09 11.97 8.18 3.11 12.68 8.14 3.14 13.40 8.67 3.17

9.12 6.77 3.34 10.16 6.81 3.39 10.51 7.40 3.41 11.20 7.42 3.44 11.55 8.02 3.46 12.24 7.99 3.49 12.93 8.51 3.53

8.71 6.67 3.35 9.70 6.71 3.40 10.03 7.30 3.42 10.69 7.32 3.45 11.02 7.91 3.47 11.68 7.88 3.51 12.34 8.39 3.54

7.90 6.31 3.36 8.80 6.34 3.41 9.10 6.90 3.43 9.70 6.92 3.47 10.00 7.47 3.48 10.60 7.44 3.52 11.20 7.93 3.55

6.03 5.20 2.98 6.72 5.23 3.03 6.95 5.68 3.04 7.41 5.70 3.07 7.63 6.16 3.09 8.09 6.13 3.12 8.55 6.53 3.15

5.39 5.10 2.92 6.01 5.13 2.97 6.21 5.58 2.99 6.62 5.59 3.02 6.82 6.04 3.03 7.23 6.02 3.06 7.64 6.41 3.09

-15

232518

21

16

18

AFR

27.7

46

25

30

35

40

Indoor temperature

Outdoor temperature

12

15

°CDB

-10

0

5

20

10

15

272932

231921

°CDB

°CWB

TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI

8.73 6.97 1.32 9.72 7.02 1.34 10.05 7.63 1.35 10.72 7.65 1.36 11.05 8.26 1.37 11.71 8.23 1.39 12.37 8.77 1.40

8.49 6.76 1.71 9.46 6.80 1.74 9.78 7.39 1.75 10.43 7.41 1.77 10.75 8.01 1.78 11.40 7.97 1.79 12.04 8.49 1.81

8.15 6.72 2.20 9.08 6.76 2.24 9.39 7.35 2.25 10.01 7.37 2.27 10.31 7.96 2.28 10.93 7.93 2.31 11.55 8.45 2.33

8.04 6.54 2.24 8.95 6.58 2.28 9.26 7.16 2.29 9.87 7.18 2.31 10.17 7.75 2.33 10.78 7.72 2.35 11.39 8.23 2.37

8.01 6.65 2.26 8.92 6.69 2.30 9.22 7.28 2.31 9.83 7.30 2.33 10.13 7.88 2.35 10.74 7.85 2.37 11.35 8.37 2.39

8.43 6.70 2.47 9.39 6.74 2.50 9.71 7.33 2.52 10.35 7.35 2.54 10.67 7.94 2.56 11.31 7.90 2.58 11.95 8.42 2.61

9.82 7.34 3.00 10.94 7.38 3.05 11.31 8.03 3.06 12.06 8.05 3.10 12.43 8.69 3.11 13.18 8.66 3.14 13.92 9.23 3.17

9.38 7.13 3.34 10.45 7.18 3.39 10.80 7.80 3.41 11.52 7.83 3.44 11.87 8.45 3.46 12.59 8.42 3.49 13.30 8.97 3.53

9.20 7.05 4.06 10.25 7.09 4.13 10.60 7.71 4.15 11.30 7.74 4.19 11.65 8.36 4.21 12.35 8.32 4.25 13.05 8.86 4.30

8.85 7.03 4.05 9.86 7.08 4.11 10.19 7.69 4.13 10.86 7.72 4.17 11.20 8.33 4.19 11.87 8.30 4.24 12.54 8.84 4.28

6.61 5.89 3.07 7.37 5.93 3.12 7.62 6.44 3.14 8.12 6.46 3.17 8.37 6.98 3.18 8.87 6.95 3.22 9.38 7.41 3.25

5.95 5.91 2.95 6.62 5.94 2.99 6.85 6.46 3.01 7.30 6.48 3.04 7.53 7.00 3.05 7.98 6.97 3.09 8.43 7.42 3.12

-15

232518

21

16

18

AFR

31.7

46

25

30

35

40

Indoor temperature

Outdoor temperature

12

15

°CDB

-10

0

5

20

10

15

272932

231921

08-02

HEATING CAPACITY

This table is created using the maximum capacity.

MODEL : AB A30LBT

MODEL : AB A36LBT

AFR : Air flow rate (m3/min)
TC : Total capacity (kW)
PI : Power Input (kW)

TC PI TC PI TC PI TC PI TC PI

9.17 3.97 8.95 4.05 8.73 4.13 8.51 4.22 8.29 4.30

9.88 4.02 9.65 4.10 9.41 4.19 9.18 4.27 8.94 4.35

10.56 4.04 10.31 4.12 10.06 4.21 9.81 4.29 9.56 4.38

11.81 4.06 11.53 4.15 11.25 4.23 10.97 4.32 10.69 4.40

12.95 3.97 12.64 4.05 12.33 4.14 12.02 4.22 11.72 4.30

13.34 3.46 13.02 3.53 12.70 3.61 12.38 3.68 12.07 3.75

13.75 3.34 13.42 3.41 13.09 3.47 12.77 3.54 12.44 3.61

12.18 2.59 11.89 2.65 11.60 2.70 11.31 2.76 11.02 2.80

12.17 2.28 11.88 2.33 11.59 2.38 11.30 2.43 11.01 2.46

12.71 2.26 12.41 2.31 12.10 2.36 11.80 2.40 11.50 2.44

AFR

°CDB

31.7

24

-16

-11

-7

Outdoor temperature

8

5

3

10

15

10

6

151820

7

-15

24

0

-2

-10

-5

°CDB

°CWB

22

Indoor temperature

161820

TC PI TC PI TC PI TC PI TC PI

8.22 3.38 8.02 3.45 7.83 3.52 7.63 3.59 7.44 3.67

8.79 3.39 8.58 3.46 8.37 3.53 8.16 3.60 7.95 3.67

9.54 3.40 9.31 3.47 9.08 3.54 8.86 3.61 8.63 3.69

10.11 3.41 9.87 3.48 9.63 3.55 9.39 3.62 9.15 3.69

11.22 3.37 10.96 3.44 10.69 3.51 10.42 3.58 10.16 3.65

11.76 3.34 11.48 3.41 11.20 3.48 10.92 3.55 10.64 3.62

12.12 3.27 11.83 3.34 11.54 3.40 11.25 3.47 10.97 3.54

10.86 2.56 10.60 2.61 10.34 2.67 10.08 2.72 9.82 2.76

10.85 2.26 10.59 2.30 10.33 2.35 10.07 2.40 9.81 2.43

11.31 2.27 11.04 2.31 10.77 2.36 10.50 2.41 10.23 2.45

AFR

°CDB

27.7

24

-16

-11

-7

Outdoor temperature

8

5

3

10

15

10

6

151820

7

-15

24

0

-2

-10

-5

°CDB

°CWB

22

Indoor temperature

161820

08-03

MODEL : AB*A30 / 36LBT / AO*A30 / 36LBTL

Indoor temperature

Indoor humidity

Outdoor temperature

Cooling

Dry

18 to 32°C

About 80% or less

-15 to 46°C

Heating

About 30°C or less

-

-15 to 24°C

Operation Range

Mode

8-2. OPERATION RANGE

08-04

8-3. ELECTRIC CHARACTERISTICS

Model Name

AB*A30LBT AB*A36LBT

Voltage V

Frequency Hz

Max Operating Current A 17.0 20.0

Circuit breaker A 0.6 0.9

Connection Cable

mm

2

1.5 - 2.5 1.5 - 2.5

Limited wiring length m 26 31

*1)Wiring Spec.
Power Supply

230

50

Main fuse (Circuit breaker)
current

A

Power cable

mm

2

*2)Limited wiring length m 21 18

*1) Wiring spec.
Selected sample
(Selected based on Japan Electrotechnical Standard and Codes Committee E0005)

*2) Limited wiring length :
This is the wiring length in case voltage descent is less than 2%.
When the wiring length becomes long, please select the wiring of a more larger diameter.

15.0

*1) Wiring spec.

230

50

4.0

Model Name

AO*A30LBTL AO*36LBTL

Power Supply

Starting current

Max Operating Current

Voltage

Frequency

V

Hz

A

A

20

25

20

08-05

OUTDOOR UNIT

INDOOR UNIT

8-4. SAFETY DEVICE

AO A30L AO A36L

Current fuse

(NEAR THE TERMINAL)

Current fuse

(FILTER PRINTED CIRCUIT BOARD)

Current fuse

(MAIN PRINTED CIRCUIT BOARD)

Fan motor protection Thermal protection program

High Pressure Protection Pressure Switch

Thermal protection program
(COMPRESSOR TEMP.)

Thermal protection program
(DISCHARGE TEMP.)

Protection form

25A 250V

10A 250V

Model

3.15A 250V

Compressor protection

Circuit protection

OFF : 120°C

ON : 80°C

OFF : 110°C

ON : After 7 minutes

OFF : 140±20°C

ON : 110±20°C

OFF : 4.2±0.1MPa
ON : 3.2±0.15MPa

Circuit protection Current fuse (PCB)

Fan motor protection

Thermal protection program

140±20°C OFF

110±20°C ON

Protection form

Model

3.15A 250V

AB*30LBT

AB*36LBT

08-06

8-5. FUNCTION SETTING

( Factory setting)

1-1. Setting the Ceiling Height

Follow the instructions in the Local Setup Procedure, which is supplied with the remote control,
in accordance with the installed condition.
After the power is turned on, perform the Function Setting on the remote control.

The settings may be selected between the following two: Function Number or Setting Value.

Settings will not be changed if invalid numbers or setting values are selected.

Setting Description

Function Number Setting Value

Standard
(2.5m to 3.0m)

High ceiling
(3.0m to 3.5m)

20

00

01

The ceiling height values are fore the 4 way outlet.
Do not change this setting in the 3 way outlet mode.

8-5-1 INDOOR UNIT

Select the setting values in the table below according to the height of the ceiling.
(The unit is factory set to "00".)

( Factory setting)

Setting Description

Function Number Setting Value

Standard
(2,500 hours)

Long interval
(4,499 hours)

Short interval
(1,250 hours)

High static pressure 3

21

00

01

02

03

1-2. Setting the Filter Sign

The indoor unit has a sign to inform the user that it is time to clean the filter.
Select the time setting for the filter sign display interval in the table below according to
the amount of dust or debris in the room.
(The unit is factory set to "00")
If you do not wish the filter sign to be displayed, select the setting value for "No indication".

1-3. Setting the Cooler Room Temperature Correction

( Factory setting)

Setting Description

Function Number Setting Value

Standard

Lower control

30

00

01

Depending on the installed environment, the room temperature sensor may require a correction.
The settings may be selected as shown in the table below.

08-07

1-6. Setting Other Functions

( Factory setting)

Setting Description

Function Number Setting Value

Yes

No

40

00

01

The following settings are also possible, depending on the operating conditions.

Auto Restart

( Factory setting)

Setting Description

Function Number Setting Value

No

Yes

42

00

01

Indoor Room Temperature Sensor Switching Function
(Only for Wired remote controller)

If setting value is “00”,
room temperature is controlled by the indoor unit temperature sensor.

If setting value is “01”,
room temperature is controlled by either indoor unit temperature sensor
or remote control unit sensor.

( Factory setting)

Setting Description

Function Number Setting Value

Standard

Lower control

Slightly warmer control

Warmer control

31

00

01

02

03

1-5. Setting the Heater Room Temperature Correction

Depending on the installed environment, the room temperature sensor may require a correction.
The settings may be changed as shown in the table below.

8-5-2 Switching Remote Control Unit Signal Codes

Confirm the setting of the remote control unit signal code and the printed circuit board setting.
If these are not confirmed, the remote control unit can not be used to operate for the air conditioner.

JM1

JM2

Remote control unit
Signal code

Connect

Disconnect

Connect

Disconnect

A (Primary setting)

b

c

d

Connect

Connect

Disconnect

Disconnect

Jumper wire

08-08

8-5-3 Procedures to change the Function Setting for wireless RC

Settings will not be changed if invalid numbers or setting values are selected.

The settings may be selected between the following two: Function Number or Setting Value.

After the power is turned on, perform the "FUNCTION SETTING" according to the installation
conditions using the remote controller.

This procedure changes to the function settings used to control the indoor unit according to
the installation conditions. Incorrect settings can cause the indoor unit malfunction.

Entering the Function Setting Mode

While pressing the FAN button and SET TEMP.( ) simultaneously,
press the RESET button to enter the function setting mode.

STEP 1
Selecting the Remote Control Unit Signal Code

Use the following steps to select the signal code of the remote control unit.
(Note that the air conditioner cannot receive a signal code if the air conditioner
has not been set for the signal code.)
The signal codes that are set through this process are applicable only to the signals
in the FUNCTION SETTING.
For details on how to set the signal codes through the normal process,
refer to SELECTING THE REMOTE CONTROL UNIT SIGNAL CODE.

(1) Press the SET TEMP. ( ) ( ) buttons to change the signal code between .
Match the code on the display to the air conditioner signal code. (initially set to )
(If the signal code does not need to be selected, press the MODE button and proceed to STEP 2.)

(2) Press the TIMER MODE button and check that the indoor unit can receive signals at the displayed signal code.

The air conditioner signal code is set to A prior to shipment.
Contact your retailer to change the signal code.

The remote control unit resets to signal code A when the batteries in
the remote control unit are replaced. If you use a signal code other
than signal code A, reset the signal code after replacing the
batteries.
If you do not know the air conditioner signal code setting, try each
of the signal codes ( ) until you find the code which
operates the air conditioner.

(3) Press the MODE button to accept the signal code, and proceed to STEP 2.

08-09

STEP 2

(1) Press the SET TEMP. ( ) ( ) buttons to select the function number.
(Press the MODE button to switch between the left and right digits.)

(2) Press the FAN button to proceed to setting the value.
(Press the FAN button again to return to the function number selection.)

Selecting the Function Number and Setting Value

(4) Press the TIMER MODE button, and START/STOP button, in the order listed to confirm the settings.

(5) Press the RESET button to cancel the function setting mode.

(6) After completing the FUNCTION SETTING, be sure to turn of the power and turn it on again.

CAUTION

After turning off the power, wait 10 seconds or more
before turning on it again.
The FUNCTION SETTING doesn't become effective
if it doesn't do so.

Function number

Setting value

(3) Press the SET TEMP. ( ) ( ) buttons to select the setting the value.
(Press the MODE button to switch between the left and right digits.)

08-10

8-5-4 Procedures to change the Function Setting for wired RC

SET BACK

SUMOTUWETH FR

SA

SUMOTUWETH FR

SA

SUMOTUWETH FR

SA

SUMOTUWETH FR

SA

This procedure changes the function settings used to control the indoor unit
according to the installation conditions.
Incorrect settings can cause the indoor unit to malfunction.
This procedure should be performed by authorized installation or service personnel only.

(1) Press the set temperature buttons ( ) ( )
and fan control button simultaneously for more than
5 seconds to enter the function setting mode.

(2) Press the SET BACK button to select the indoor unit number.

(3) Press the set time buttons to select the function number.

(4) Press set temperature buttons ( ) ( ) to select the setting value.
The display flashes as shown to the right during setting value selection.

(7) After completing the FUNCTION SETTING, be sure to turn off the power and turn it on again.

(5) Press the SET button to confirm the setting.
Press the SET button for a few seconds until the setting
value stops flashing.
If the setting value display changes or if "- -" is displayed
when the flashing stops, the setting value has not been
set correctly.
(An invalid setting value may have been selected for
the indoor unit.)

(6) Repeat steps 2 to 5 to perform additional settings.
Press the set temperature buttons ( ) ( ) and fan
control button simultaneously again for more than 5 secondsto cancel the function setting mode.
In addition, the function setting mode will be automatically canceled after 1 minute
if no operation is performed.

Unit number of INDOOR UNIT

Function number

Perform the "FUNCTION SETTING"
according to the installation conditions using the remote controller.

Setting value

08-11

8-5-5 WIRED REMOTE CONTROLLER

SWITCH POSITION

Wired remote controller

DIP SW

Dual remote controller setting

Filter reset operation and filter display
( Duct model is nonfunctional.)

Can be used. ( Do not change.)

Can be used. ( Do not change.)

Can be used. ( Do not change.)

1

2

3

4

5

6

Memory backup setting

Wired remote controller

DIP Switch 1

Do not use
this DIP Switch 2

Front case (back side)

ON

ON

OFF

1
2
3
4
5
6

1. SW setting

1-1 Dual remote controller setting

Number of
remote
controller

DIP-SW 1
No.2

DIP-SW 1
No.2

Master unit Slave unit

ON

OFF

OFF

1 (Normal)

2 (Dual)

Set the remote controller DIP switch 1 No.2 according to the following table.

( Factory setting)

Memory backup

Invalidity

DIP-SW
No.6

ON Validity

OFF

( Factory setting)

Set to ON to use batteries for the memory backup.if batteries are not used,
all of the settings stored in memory will be deleted if there is a power failure.

1-2 Memory backup setting

This function is wired remotecontroll only.

DIP SWITCH SETTING

9 . INSTALLATION MANUAL

R410A

INVERTER

Large Ceiling type

CERTIFICATIONThisdrawingwasreleasedbyFGL.

CERTIFICATIONThisdrawingwasreleasedbyFGL.

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

June. 2007 Printed in Japan