Fujitsu AOU12RL2, AOU09RL2, ASU12RL2 User Manual

SPLIT TYPE
ROOM AIR CONDITIONER

WALL MOUNTED

INVERTER

SERVICE

INSTRUCTION

Models Indoor unit Outdoor unit

ASU09RL2
ASU12RL2

type

AOU09RL2
AOU12RL2

R410A

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

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

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

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

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

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

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

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

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

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

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

11. FOUR-WAY VALVE EXTENSION SELECT................................................................

12. AUTO RESTART.........................................................................................................

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

14. FORCED COOLING OPERATION..............................................................................

15. COMPRESSOR PREHEATING..................................................................................

16. ECONOMY OPERATION............................................................................................

17. POWERFUL OPERATION.......................................................................................... 01-12

01-01

01-02

01-02

01-03

01-04

01-06

01-07

01-08

01-09

01-11

01-11

01-11

01-11

01-12

01-12

01-12

18. DEFROST OPERATION CONTROL........................................................................... 01-13

19. OFF DEFROST OPERATION CONTROL...................................................................

20. VARIOUS PROTECTIONS.......................................................................................... 01-16

2. TROUBLE SHOOTING

2-1 ERROR DISPLAY.......................................................................................................

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

2-3 TROUBLE SHOOTING WITH NO ERROR CODE.....................................................

2-4 SERVICE PARTS INFORMATION.............................................................................. 02-26

01-15

02-01

02-02

02-21

3. APPENDING DATA

3-1 FUNCTION SETTING.................................................................................................

3-1-1 INDOOR UNIT....................................................................................................

3-1-2 Procedures to change the Function Setting for wireless RC..............................

3-2 Thermistor Resistance Values.....................................................................................

3-2-1 INDOOR UNIT....................................................................................................

3-2-2 OUTDOOR UNIT................................................................................................

03-01

03-01

03-03

03-06

03-06

03-06

WALL MOUNTED type

INVERTER

R410A

1 . DESCRIPTION OF EACH
CONTROL OPERATION

1. COOLING OPERATION

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.

* If the room temperature is 2°C(4°F) higher than a set temperature, the compressor operation
frequency will attain to maximum performance.

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

* When the room temperature is between +2°C(4°F) to -2.5°C(-5°F) of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Fig.1 based on the indoor
fan mode and the outdoor temperature.

( Table 1 : Compressor frequency range )

AOU09RL2
AOU12RL2

Minimum
frequency

18rps

Maximum
frequency

57rps
80rps

Maximum
frequency

80rps
96rps

When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency to Maximum Frequency.

( Fig.1 : Outdoor temperature zone )

When the outdoor

When the outdoor
temperature drops

34°C

A zone

temperature rises

(93°F)

30°C

B zone

(86°F)

19°C

C zone

(66°F)

10°C

D zone

(50°F)

0°C

E zone

36°C
(97°F)

32°C
(90°F)

21°C
(70°F)

12°C
(54°F)

2°C
(36°F)

( Table 2 : Limit of maximum speed based on outdoor temperature )

Indoor fan mode

Hi

Me Lo Quiet

ASU09RL2

ASU12RL2

Outdoor
temp. zone

A zone 80rps 49rps 42rps 32rps
B zone 80rps 49rps 42rps 32rps
C zone 80rps 49rps 42rps 32rps
D zone 49rps 44rps 40rps 29rps
E zone 49rps 44rps 40rps 29rps
F zone 49rps 44rps 40rps 29rps

A zone 96rps 61rps 51rps 33rps
B zone 96rps 61rps 51rps 33rps
C zone 96rps 61rps 51rps 33rps
D zone 73rps 57rps 45rps 33rps
E zone 73rps 57rps 45rps 33rps
F zone 73rps 57rps 45rps 33rps

(32°F)

F zone

01-01

2. HEATING OPERATION

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.

* If the room temperature is lower by 3°C (6°F) than a set temperature, the compressor operation
frequency will attain to maximum performance.

* If the room temperature is some degrees higher than a set temperature,
the compressor will be stopped.

* When the room temperature is between +2.5°C (+5°F) to -3°C (-6°F) of the setting temperature,
the compressor frequency is controlled within the range shown in Table 3.
However, the maximum frequency is limited shown in Table 4 based on the fan mode.

( Table 3 : Compressor frequency range )

Minimum
frequency

AOU09RL2

AOU12RL2

18rps

( Table 4 : Limit of maximum speed based on outdoor temperature )

Indoor fan mode

Hi

AOU09RL2

AOU12RL2

Maximum
frequency

80rps

120rps

Me Lo Quiet Auto

80rps

120rps

3. DRY OPERATION

The compressor frequency shall change according to the temperature, set temperature,
and room temperature variation which the room temperature sensor of the indoor unit body has
detected as shown in the Table 5.
However, after the compressor is driven, the indoor unit shall run at operation frequency of
(09 : 52 rps, 12 : 61 rps) for 60 seconds.

( Table 5 : Compressor frequency in Dry mode)

Operating
frequency

AO09RL2

X zone

J zone

Y zone

30rps

28rps

0rps

AO12RL2

( Fig.2 : Compressor control based on room temperature )

When the room

When the room

temperature rises

temperature drops

Ts+0.5°C (Ts+1°F)

Ts -1.5°C (Ts-3°F)

X zone

J zone

X zone 33rps

J zone

Y zone

Ts+1.5°C (Ts+3°F)

Ts -0.5°C (Ts-1°F)

Operating
frequency

25rps

0rps

Y zone

01-02

4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the Heating, Cooling, Dry and Monitoring modes.
During operation, the optimum mode is automatically switched in accordance with temperature changes.
The temperature can be set between 18°C (64°F) and 30°C (88°F) in 1°C (2°F) steps.

(Fig. 3 : Operation flow chart in Auto changeover)

START

YES

YES

Room temp.

>Ts+2°C (4°F) ?

NO

or operation command other than

Room temp.

<Ts- 2°C(4°F) ?

HEATING OPERATION

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

auto changeover operation?

NO

YES

NO

YES

TS : Setting temperature

or operation command other than

COOLING OPERATION

Thermostat remains

in OFF state for 6 minutes or

longer?

NO

System stops

auto changeover operation?

YES

YES

NO

NO

01-03

5. INDOOR FAN CONTROL

1. Fan speed

( Table 6 : Indoor fan speed )

Operation mode Air flow mode

Heating

Cooling/ Fan

Dry

Powerful 1420

Hi 1360

Me+ 1290

Me 1120

Lo 900

Quiet 700

Cool air prevention 600

S-Lo 480

Powerful 1400

Hi 1320

Me 1120

Lo 840 860

Quiet 700

* Soft Quiet 600

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)

ASU09RL2

X zone: 700

J zone: 600

Speed (rpm)

ASU12RL2

1420
1360
1290
1120

900
700
600

480
1400
1320
1120

700

600

X zone: 700

J zone: 600

2. FAN OPERATION

The airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi, while the indoor fan only runs.
When fan mode is set at [Auto], it operates on [Me] fan Speed.

3. COOLING OPERATION

Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig4.
On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Cool]
operation modes Quiet, Lo, Me, Hi, as shown in Table 6.

( Fig.4 : Airflow change - over ( Cooling : Auto ) )

When the room

When the room
temperature drops

TR-Ts > 2°C (4°F)

2°C (4°F) > TR-Ts > 1°C (2°F)

1°C (2°F) > TR-Ts

=

Hi mode

Me mode

Lo mode

temperature rises

TR-Ts > 2.5°C (5°F)

=

2.5°C (5°F) > TR-Ts > 1.5°C (3°F)

1.5°C (3°F) > TR-Ts

=

TR : Room temperature
Ts : Setting temperature

4. DRY OPERATION

Refer to the Table 6.
During the dry mode operation, the fan speed setting can not be changed.

01-04

5. HEATING OPERATION

Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig. 5
On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow
of [Heat] operation modes Quiet, Lo, Me, High, as shown in Table 6.

( Fig.5 : Airflow change - over ( Heating : Auto ) )

When the room
temperature rises

TR-Ts > -1°C (-2°F)

=

-1°C (-2°F) > TR-Ts > -2°C (-4°F)

=

Lo mode

Me mode

When the room
temperature drops

TR-Ts > -1.5°C (-3°F)

=

-1.5°C (3°F) > TR-Ts > -2.5°C (-5°F)

TR : Room temperature
Ts : Setting temperature

=

-2°C (-4°F) > TR-Ts

Me+ mode

-2.5°C (-5°F) > TR-Ts

6. COOL AIR PREVENTION CONTROL (Heating mode)

The maximum value of the indoor fan speed is set as shown in Fig.6 based on the detected
temperature by the indoor heat-exchanger sensor on heating mode.

( Fig.6 : Cool air prevension control )

<Powerful operation>

When the Indoor heat
exchanger temp. rises

42°C (108°F)

39°C (102°F)

37°C (99°F)

30°C (86°F)

<Normal operation>

When the Indoor heat
exchanger temp. drops

* Hi or setting
Fan mode

* Me+ or setting
Fan mode

* Lo or setting
Fan mode

Cool air
prevention

S-Lo

* Lower speed is selected.

37°C (99°F)

34°C (93°F)

32°C (90°F)

28°C (82°F)

When the Indoor heat
exchanger temp. rises

42°C
(108°F)

39°C
(102°F)

37°C
(99°F)

30°C

(86°F)

When the Indoor heat
exchanger temp. drops

Powerful

Hi

Lo

Cool air
prevention

S-Lo

* Lower speed is selected.

37°C
(99°F)

34°C
(93°F)

32°C
(90°F)

28°C
(82°F)

7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)

Switch the airflow [Auto] at cooling mode, and the indoor fan motor will run as shown in Fig.7.

( Fig.7 : Indoor fan control )

Compressor

ON

OFF

Indoor fan
Setting air flow

Indoor fan
(as shown in Table 7)

S-Lo

OFF

10 30 60 180 60 180 60 10 30

( Table 7 : Indoor fan speed )

ASU09/12RL2

Dry

X zone J zone

700rpm 600rpm

Y zone

0 480rpm 700rpm

Cooling

(sec)

01-05

6. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor

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

( Table 8 : Type of Motor )

AC motor DC motor

AOU09RL2
AOU12RL2

2. Fan Speed

( Table 9 : Outdoor fan speed )

Zone

Y 730 / 650 / 470

AOU09RL2 900 / 650 / 470 730 / 470

AOU12RL2 900 / 760 / 680 / 470 760 / 470

Refer to Fig.8

Z
F
G
Y
Z
F
G

Cooling Heating

730 / 470 / 360

360 / 150

210 / 150
860 / 760 / 470
860 / 470 / 380

380 / 280
280 / 200

Dry

( Fig.8 : Outside air temperature zone selection )

Outside air
temperature

21°C (70°F)

12°C (54°F)

2°C (36°F)

Y zone

Z zone

F zone

G zone

Outside air
temperature

19°C (66°F)

10°C (50°F)

0°C (32°F)

*The outdoor fan speed mentioned adove depends on the compressor frequency.
(When the compressor frequency increases, the outdoor fan speed also changes to the higher
speed. When the compressor frequency decreases, the outdoor fan speed also changes to the
lower speed.)

*After the defrost control is operated on the heating mode, the fan speed keeps at the higher speed
as table 10 without relating to the compressor frequency.

( Table 10 : Outdoor fan speed after the defrost )

AOU09RL2
AOU12RL2

900 rpm

01-06

7. LOUVER CONTROL

1. VERTICAL LOUVER CONTROL

(Function Range)

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

Types of Air flow Direction Setting:

, , , : During Cooling/Dry modes
, , , : During Heating

The Remote Controller's display does not change.

Use the air direction adjustments within the ranges shown above.
The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

Cooling / Dry mode Horizontal flow
Heating mode Downward flow

If you set the angle to position ~ for more than 30 minutes in Cooling or Dry mode,
they automatically return to position .
In Cooling or Dry mode, if the angle is set to position ~ for many hours,
condensation may be formed, and the drips may wet your property.

Fig.8 : Air Direction Range

1

2

3

4

5

6

7

2. ADJUST THE RIGHT-LEFT LOUVERS

Move the Right-Left louvers to adjust air flow in the direction you prefer.

Right-Left Louvers

Knob

Knob (2 places)

3. SWING OPERATION

To select Vertical Airflow Swing Operation

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

(Table10 : Swinging Range)

Range

Cooling / Dry mode
Fan mode ( )

de

Heating
Fa

mo

)

(

e

od

m

n

The SWING operation may stop temporarily when the air conditioner’s fan is not operating,
or when operating at very low speeds.

To select Horizontal Airflow Swing Operation

(No function)

01-07

8. COMPRESSOR CONTROL

1. OPEARTION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as
shown in the Table 11.

(Table 11 : Compressor frequency range)

Cooling / Dry Heating

Minimum Maximum Minimum Maximum

AOU09RL2

AOU12RL2

18rps

2. OPEARTION FREQUENCY CONTROL AT NORMAL START UP

The compressor frequency soon after the start-up is controlled as shown in the Fig.9.

(Fig.9 : Compressor control at start-up)

Frequency
Frequency
Frequency
Frequency
Frequency
Frequency

80rps
96rps

18rps 120rps

Time

6

Frequency

78rps

Time

6

(Frequency)

AOU09RL2

AOU12RL2

(Time)

AOU09RL2

AOU12RL2

Time

Frequency

56rps 67rps 75rps

56rps 74rps 87rps 97rps 108rps 119rps

Time

80sec 140sec 200sec

60sec 100sec 140sec 200sec 410sec350sec

Time Time Time

Frequency

Time Time Time

Frequency Frequency

78rps 78rps

380sec 440sec440sec

Time

Frequency

Time

3. LIMITATION OF COMPRESSOR FREQUENCY BY OUTDOOR TEMPERATURE

The minimum compressor frequency is limited by outdoor temperature as shown in the Table12.

(Table12 : Limitation of Compressor Frequency)

[ Cooling/ Dry ]

10°C (50°F) 14°C (59°F) 40°C (104°F)

Under Over Under Over Under Over

AOU09RL2

AOU12RL2

35rps 23rps

45rps 27rps

30rps-------

[ Heating ]

AOU09RL2

AOU12RL2

- 3°C (26°F) 7°C (45°F) 14°C (59°F) 40°C (104°F)

Under Over Under Over Under Over Under Over

34rps 22rps 27rps

36rps 27rps 27rps

30rps-------

01-08

9. TIMER OPEARTION CONTROL

9-1 WIRELESS REMOTE CONTROLLER

The Table 13 shows the available timer setting based on the product model.

( Table 13 : Timer Setting )

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

ASU09RL2
ASU12RL2

1. OPEARTION FREQUENCY RANGE

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

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

Operation mode

Stop mode

Set time Set time Set time Set time

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.

Operation mode

Operation mode

Stop mode

Stop mode

01-09

3. SLEEP TIMER

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

In the cooling operation mode

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

Set temperature rises

( Ts : Set temperature )

+2°C (4°F)
+1°C (2°F)

Ts

Stop of operation

Set

60min

In the heating operation mode

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

Set temperature lowers

( Ts : Set temperature )

Ts

-1°C (-2°F)

-2°C (-4°F)

-3°C (-6°F)

-4°C (-8°F)

Stop of operation

Set

30min

30min

30min

01-10

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

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

11. FOUR-WAY VALVE EXTENSION SELECT

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

12. AUTO RESTART

When the power was interrupted by a power failure, etc. during operation, the operation contents
at that time are memorized and when power is recovered, operation is automatically started with
the memorized operation contents.
When the power is interrupted and recovered during timer operation, since the timer operation time
is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF)
the indoor unit body Timer lamp.

[ Operation contents memorized when the power is interrupted ]

Operation mode
Set temperature
Set air flow
Timer mode and set time
Set air flow Direction
Swing
ECONOMY operation

13. MANUAL AUTO OPERATION (Indoor unit body operation)

When the remote control is lost or battery power dissipated, this function will work without the remote control.
When MANUAL AUTO button is set more than 3seconds and less than 10seconds, MANUAL AUTO OPERATION
will be started as shown in Table14.
To stop operation, press the MANUAL AUTO button for 3seconds.

(Table14 : MANUAL AUTO OPERATION)

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

SWING
ECONOMY

OFF
OFF

(No timer setting available)

Press and hold MANUAL AUTO
button for 3 ~ 10seconds

01-11

14. FORCED COOLING OPERATION (TEST OPERATION)

When FORCED COOLING OPERATION is set, the operation is controlled as shown in Table15.

( Table15 : FORCED COOLING OPERATION )

Forced cooling operation
OPERATION MODE
FAN CONT. MODE
TIMER MODE

SETTING TEMP.
SETTING LOUVER

SWING
ECONOMY

Cooling
Hi

­Room Temp is not controlled
Horizontal

(It is changed follow as setting of remote controller)
OFF

-

Forced cooling operation is started when press MANUAL AUTO button for 10 seconds or more.
During the forced cooling operation, it operates regardless of room temperature sensor.
Operation lamp and Timer lamp blink at the same time during the forced cooling operation.
They blink for 1 second ON and 1 second OFF on both Operation lamp and Timer lamp (same as test operation).
Forced cooling operation is released after 60 minutes of starting operation or pressing MANUAL AUTO button

for 3 seconds or pressing START/STOP button on the remote controller.

15. COMPRESSOR PREHEATING

When the outdoor heat exchanger temperature is lower than 5°C and the all 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 (44.6°F) or greater,
preheating is ended.

16. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller.
At the maximum output, ECONOMY Operation is approximately 70% of normal air conditioner operation
for cooling and heating.
The ECONOMY operation is almost the same operation as below settings.

( Table 16 )

Mode Cooling/ Dry

Heating

Target temperature Setting temp.+1°C (2°F) Setting temp.-1°C (-2°F)

17. POWERFUL OPERATION

The POWERFUL OPERATION functions by pressing POWERFUL button on the remote controller.
The indoor unit & outdoor unit will operate at maximum power as shown in Table17.

(Table17)

Powerful operation

COMPRESSOR FREQUENCY Maximum

FAN CONT. MODE Powerful

SETTING LOUVER Cooling/ Dry : 3, Heating : 5

Release Condition is as follows.
[Cooling / Dry]

- Room temperature < Setting temperature - 1.5°C (-3°F) or Operation time has passed 20 minutes.
=

[Heating]

- Room temperature > Setting temperature +1.5°C (+3°F) or Operation time has passed 20 minutes.

=

01-12

18. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts as shown in the following Table 18.

(Table 18 : Condition of starting Defrost Operation)

Normal defrost

Less than 25 minutes More than 25 minutes

Compressor integrating operation time

Outdoor heat exchanger temp. < -17°C (1.4°F)
(at outside air temp. > -10°C (14°F))

Outdoor heat exchanger temp. < Outside air temp.

- 7°C (-44.6°F)
or Outdoor heat exchanger temp. < - 20°C (-13°F)
(at outside air temp. < -10°C (14°F))

More than 213 minutes
(For continuous operation)

Outdoor heat exchanger

temperature below -5°C (-10°F)

=

Integrating defrost

Does not operate

Compressor integrating operation time

More than 240 minutes
(For continuous operation)

Outdoor heat exchanger

temperature below -3°C (-6°F)

If the compressor continuous operation time is less than 10 minutes,
the OFF number of the compressor is counted.
If any defrost operated, the compressor OFF count is cleared.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 19.

(Table 19 : Defrost Release Condition)

Release Condition

=

=

=

Less than 10 minutes
( For intermittent operation )

OFF count of the compressor

40 times

Outdoor heat exchanger temperature sensor value is higher than +16°C (60.8°F) or
Compressor operation time has passed 15 minutes.

01-13

3. Defrost Flow Chart

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

Heating operation start : Compressor ON

(Not defrosted for 10 minutes)

Normal defrost

Outside air temp. > -10°C Outside air temp. < -10°C

Outdoor HEX temp.
Below - 17°C(1.4°F)

=

Outdoor HEX temp.

- Outside air temp.
Below - 7°C(-44.6°F)
or
Outdoor HEX temp.
Below - 20°C(-4°F)

(14°F)(14°F)

Defrost start

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

Integrating defrost

Intermittent operation Continuous operation

Compressor
OFF count :
40 times
(Less than 10min.)

Compressor
integrating
operation:
Over 240 min.

Outdoor
heat exchanger
temperature:
Below - 3°C
(26.6°F)

Compressor
integrating
operation:
Over 213 min.

Outdoor
heat exchanger
temperature:
Below - 5°C
(23°F)

Outdoor fan : OFF
Compressor speed : 0 rps
4-way valve : OFF
Compressor speed : 90rps

Outdoor HEX temp.: Over 16°C (60.8°F)

or

Compressor ON time: Maximum 15 minutes

Defrost end

01-14

19. OFF DEFROST OPEARTION CONTROL

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.

1. OFF DEFROST OPERATION CONDITION

In heating operation, the outdoor heat exchanger temperature is less than - 4°C (24.8°F),
compressor continuous operation more than 10 minutes, and
compressor operation integrating time lasts for more than 30 minutes.

2. OFF DEFROST END CONDITION

Release Condition

Outdoor heat exchanger temperature sensor value is higher than
16°C (60.8°F) or Compressor operation time has passed 15 minutes.

OFF Defrost Flow Chart

Heating operation stop

Outdoor heat exchanger temperature :
Below - 4°C (24.8°F)

Compressor continuous operation :
Over 10 minutes
Compressor integrating operation :
Over 30 minutes

Defrost start

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

Outdoor heat exchanger temperature:
Over 16°C (60.8°F) or
Compressor ON time: Over 15 minutes

Defrost end

01-15

20. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL

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

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

When the discharge temperature becomes lower than Temperature , the protection control of the
compressor frequency will be released.
When the discharge temperature becomes higher than Temperature , the compressor is stopped
and the indoor unit body Operation lamp and Timer lamp starts blinking.

(Table 20 : Discharge temperature over rise prevension control / Release temperature)

Temperature

Temperature

Temperature

104°C

(219.2°F)

101°C

(213.8°F)

110°C

(230°F)

2. CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input current does not exceed
the current limit value 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 21 : Current release operation value / Release value )

[ Heating ]

AOU09RL2

OT (Control / Release)

10.5A / 10.0A

17°C (62.6°F)

12.0A / 11.5A

12°C (53.6°F)

12.5A / 12.0A

5°C (41°F)

12.5A / 12.0A

OT : Outdoor Temperature

[ Cooling ]

AOU09RL2

OT (Control / Release)

8.0A / 7.5A

46°C (114.8°F)

9.0A / 8.5A

40°C (104°F)

12.0A / 11.5A

[ Heating ]

AOU12RL2

OT (Control / Release)

11.0A / 10.5A

17°C (62.6°F)

12.0A / 11.5A

12°C (53.6°F)

14.0A / 13.5A

5°C (41°F)

14.5A / 13.5A

OT : Outdoor Temperature

[ Cooling ]

AOU12RL2

OT (Control / Release)

9.0A / 8.5A

46°C (114.8°F)

10.0A / 9.5A

40°C (104°F)

12.0A / 11.5A

OT : Outdoor Temperature

OT : Outdoor Temperature

01-16

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 22 : Anti-freezing Protection Operation / Release Temperature)

Outdoor temperature

Over than 10°C (50°F)*1
or 12°C (53.6°F) *2

Less than 10°C(50°F) *1
or 12°C (53.6°F) *2

Temperature Temperature

7°C (44.6°F)

4°C (39.2°F)

13°C (55.4°F)

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

4. COOLING PRESSURE OVERRISE PROTECTION

When the outdoor unit heat exchange sensor temperature rises to 67°C (152.6°F) or greater,
the compressor and the outdoor fan motor are stopped and trouble display is performed.

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.

[ Control System ]

Indoor heat exchange
temperature rises

Compressor is stopped

63°C (145.4°F)

The compressor frequency is
decreased 25rps every 120seconds.

55°C (131°F)

The compressor frequency is
decreased 3rps every 60seconds.

53°C (127.4°F)

Stable zone

50°C (122°F)

It returns to the normal operation

Indoor heat exchange
temperature drops

01-17

WALL MOUNTED type

INVERTER

R410A

2 . TROUBLE SHOOTING

2. TROUBLESHOOTING

2-1 ERROR DISPLAY

Please refer the flashing pattern as follows.
Indoor Unit : ASU09/ 12RL2
The Operation, Timer and Economy lamps operate as follows according to the error contents.

Error Contents

Serial communication error

Indoor unit PCB model information error

Manual auto switch error

Room temp. sensor error

Indoor unit Heat Ex. middle temp.
sensor error

Indoor unit fan motor error

Outdoor unit main PCB model
information error or communication error

PFC circuit error

Trip terminal L error

Discharge temp. sensor error

Operation

(Green)

3 times

3 times

4 times

6 times

7 times

Indoor Unit Display

[ ]

Timer

[ ]

(Orange)

5 times

1 times

2 times6 times

4 times

5 times6 times

1 times

Economy

(Green)

Continuous1 times1 times

Continuous2 times

Continuous

Continuous

Continuous4 times 2 times

Continuous1 times5 times

Continuous

Continuous

Continuous

Continuous

[ ]

Trouble
shooting

1

2

3

4

5

6

7

8

9

10

Outdoor unit Heat Ex. liquid temp.
sensor error

Outdoor temp. sensor error

Current sensor error

Trip detection

Compressor rotor position detection error

Outdoor unit fan motor error

4-way valve error

Discharge temp. error

7 times 3 times

7 times 4 times

8 times

9 times 9 times

4 times

4 times9 times

5 times9 times

7 times9 times

1 times10 times

Continuous

Continuous

Continuous

Continuous

Continuous

Continuous

Continuous

Continuous

11

12

13

14

15

16

17

18

02-01

2-2 TROUBLE SHOOTING WITH ERROR CODE

Trouble shooting 1-1

Indicate or Display:

OUTDOOR UNIT Error Method:

Serial communication error

Refer to error code table.

(Serial Reverse Transfer Error)

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When the indoor unit cannot receive the serial signal from Outdoor unit
more than 2minutes after power ON, or the indoor unit cannot receive
the serial signal more than 15seconds during normal operation.

Forecast of Cause:

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

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

YESYES

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.

NO

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).

OK

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC103V (AC115V -10%) - 127V (AC115V +10%) appears
at Outdoor Unit Terminal L - N.

OK

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

Check Serial Signal (Reverse Transfer Signal)

>> Check if Indicated value swings between AC45V and AC135V at Outdoor Unit Terminal 1 - 3.

>> If it is abnormal, replace Main PCB.

GREEN

WHITE

BLACK

RED

WHITE

BLACK

N

L

3

2

+

-

1

02-02

Trouble shooting 1-2

INDOOR UNIT Error Method:

Serial communication error
(Serial Forward Transfer Error)

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB
Indoor unit Fan motor

Detective details:

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

Forecast of Cause:

1. Connection failure 2. External cause 3. Controller PCB failure 4. Indoor unit fan motor failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

YESYES

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.

OK

NO

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 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC103V (AC115V -10%) - 127V (AC115V +10%) appears
at Outdoor Unit Terminal L - N.

OK

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

Check Serial Signal (Forward Transfer Signal)

>> Check if Indicated value swings between AC30V and AC130V at Outdoor Unit Terminal 2 - 3.

>> If it is abnormal, replace Controller PCB.

>> If it is abnormal, Check Indoor unit fan motor. (PARTS INFORMATION 4)

>> If Indoor unit fan motor is abnormal, replace Indoor unit fan motor and Controller PCB.

GREEN

WHITE

BLACK

RED

WHITE

BLACK

N

L

3

+

-

2

1

02-03

Trouble shooting 2
INDOOR UNIT Error Method:

Indoor unit PCB model information
error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When power is on and there is some below case.

1. When model information of EEPROM is incorrect.

2. When the access to EEPROM failed.

Forecast of Cause:

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?

YESYES

Check Point 2 :
Check Indoor unit electric components

Check all connectors.
(loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

NO

Check Point 1-2 :
Check external cause such as noise

Check if the ground connection is proper.
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 3 : Replace Controller PCB

Change Controller PCB.

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.

02-04

Trouble shooting 3
INDOOR UNIT Error Method:

INDOOR UNIT

Manual auto switch error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB
Indicator PCB

Detective details:

When the Manual auto switch becomes ON for consecutive 60 or
more seconds.

Manual auto switch

Forecast of Cause :

1. Manual auto switch failure 2.Controller PCB and Indicator PCB failure

Check Point 1 : Check the Manual auto switch

Check if Manual auto switch is kept pressed.
Check ON/OFF switching operation by using a meter.

>>If Manual Auto Switch is disabled (on/off switching), replace it.

OKOK

Check Point 2 : Replace Controller PCB

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

02-05

Trouble shooting 4
INDOOR UNIT Error Method:

INDOOR UNIT

Room temp. sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When Room temperature thermistor open or short-circuit is detected.

Room temperature thermistor

Forecast of Cause :

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.

OK

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

Thermistor Characteristics (Approx. value)

Temperature

-10°C

(14°F)

-5°C

(23°F)

0°C

(32°F)

5°C

(41°F)

10°C

(50°F)

15°C

(59°F)

20°C

(68°F)

25°C

(77°F)

10.012.515.7119.9125.3932.6742.3655.46Resistance Value (k )

Temperature

30°C

(86°F)

35°C

(95°F)

40°C

(104°F)

5.3166.528.051Resistance Value (k )

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

45°C

(113°F)

4.354

OK

Check Point 3 : 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)

THERMISTOR
(PIPE)

THERMISTOR
(ROOM TEMP.)

If the voltage does not appear, replace Controller PCB.

BLACK
BLACK
BLACK
BLACK

1

1

2

2

CN4

3

3

4

4

02-06

Trouble shooting 5
INDOOR UNIT Error Method:

INDOOR UNIT

Indoor unit Heat Ex. middle temp.
sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB

Detective details:

When Heat Ex. temperature thermistor open or short-circuit is detected.

Heat Ex. temperature thermistor

Forecast of Cause :

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

-10°C

(14°F)

-5°C

(23°F)

0°C

(32°F)

5°C

(41°F)

10°C

(50°F)

20°C

(68°F)

62.9102.1131.4170.7223.3295.1Resistance Value (k )

Temperature

30°C

(86°F)

40°C

(104°F)

50°C

(122°F)

17.1125.839.78Resistance Value (k )

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

60°C

(140°F)

11.6

63°C

(144°F)

10.36

OK

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)

THERMISTOR
(PIPE)

THERMISTOR
(ROOM TEMP.)

If the voltage does not appear, replace Controller PCB.

BLACK
BLACK
BLACK
BLACK

1

1

2

2

CN4

3

3

4

4

02-07

Trouble shooting 6
INDOOR UNIT Error Method:

Indoor unit fan motor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB
Indoor unit Fan motor

Detective details:

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

Forecast of Cause:

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

4. Control PCB failure 5. Indoor unit fan motor 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.

OK

Check Point 2 : Check ambient temp. around motor

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

>>Upon the temperature coming down, restart operation.

OK

Check Point 3 : Check Indoor unit fan motor

Check Indoor unit fan motor. (PARTS INFORMATION 4)

>>If Indoor unit fan motor is abnormal, replace Indoor unit fan motor.

OK

Check Point 4 : Replace Controller PCB

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

02-08

Trouble shooting 7
OUTDOOR UNIT Error Method:

Outdoor unit main PCB model
information error or communication error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause:

1. External cause (Noise, temporary open, voltage drop) 2. Main PCB failure

Check Point 1-1 : Reset Power supply and operate

Does Error indication show again?

YESYES

Check Point 2 : Replace Main PCB

Change Main PCB.

Detective details:

When model information of EEPROM is incorrect at power ON.
If the above operation is repeated 3 times,
the compressor stops permanently.

NO

Check Point 1-2 : Check external cause

Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly or there are no related
cables near the power line.

02-09

Trouble shooting 8
OUTDOOR UNIT Error Method:

INDOOR UNIT

PFC circuit error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When inverter output DC voltage is higher than 415V for over 3 seconds,
the compressor stops.
If the same operation is repeated 5 times, the compressor stops permanently.

Forecast of Cause :

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

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.

OKOK

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.

OKOK

Check Point 3 : Replace Main PCB

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

02-10

Trouble shooting 9
OUTDOOR UNIT Error Method:

Trip terminal L error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Forecast of Cause :

1. Main PCB failure

Check Point 1 : Replace Main PCB

Change Main PCB.

Detective details:

When the signal from FO terminal of IPM in Main PCB is "L"(=0V)
while the compressor stops.

02-11

Trouble shooting 10
OUTDOOR UNIT Error Method:

INDOOR UNIT

Discharge temp. sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Discharge pipe temperature thermistor

Detective details:

When Discharge pipe temperature thermistor open or short-circuit
is detected at power ON or while running the compressor.

Forecast of Cause :

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

-10°C

(14°F)

-5°C

(23°F)

0°C

(32°F)

5°C

(41°F)

10°C

(50°F)

20°C

(68°F)

64.22102.5130.9168.6218.6286.3Resistance Value (k )

30°C

(86°F)

41.33

Temperature

40°C

(104°F)

27.26

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

50°C

(122°F)

18.40

60°C

(140°F)

12.68

70°C

(158°F)

80°C

(176°F)

90°C

(194°F)

100°C

(212°F)

110°C

(230°F)

2.573

OKOK

Check Point 3 :

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)

THERMISTOR
(PIPE)

THERMISTOR
(DISCHARGE)

THERMISTOR
(OUTDOOR)

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

1

1

2

2

CN71

3

3

4

4

1

1

2

2

CN70

3

3

120°C

(248°F)

1.9563.4304.6396.3758.909Resistance Value (k )

If the voltage does not appear, replace Main PCB.

02-12

Trouble shooting 11
OUTDOOR UNIT Error Method:

Outdoor unit Heat Ex. liquid temp.
sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Heat exchanger temperature thermistor

Detective details:

When Heat exchanger temperature thermistor open or
short-circuit is detected at power ON or while running the compressor.

Forecast of Cause :

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

-10°C

(14°F)

-5°C

(23°F)

0°C

(32°F)

5°C

(41°F)

10°C

(50°F)

20°C

(68°F)

6.1299.77512.4716.0520.8027.21Resistance Value (k )

30°C

(86°F)

3.947

Temperature

40°C

(104°F)

50°C

(122°F)

60°C

(140°F)

70°C

(158°F)

80°C

(176°F)

0.61150.85311.2131.7592.606Resistance Value (k )

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

OKOK

Check Point 3 :

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)

THERMISTOR
(PIPE)

THERMISTOR
(DISCHARGE)

THERMISTOR
(OUTDOOR)

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

1

1

2

2

CN71

3

3

4

4

1

1

2

2

CN70

3

3

If the voltage does not appear, replace Main PCB.

02-13

Trouble shooting 12
OUTDOOR UNIT Error Method:

Outdoor temp. sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Outdoor temperature thermistor

Detective details:

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

Forecast of Cause :

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

-20°C

(4.0°F)

-15°C
(5°F)

-10°C

(14°F)

-5°C

(23°F)

0°C

(32°F)

5°C

(41°F)

26.5334.5745.4060.2380.56109.0Resistance Value (k )

10°C

(50°F)

20.56

Temperature

15°C

(59°F)

20°C

(68°F)

25°C

(77°F)

30°C

(86°F)

35°C

(95°F)

6.4087.97810.0012.2616.04Resistance Value (k )

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

40°C

(104°F)

5.184

45°C

(113°F)

4.216

50°C

(122°F)

3.451

OKOK

Check Point 3 :

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)

THERMISTOR
(PIPE)

THERMISTOR
(DISCHARGE)

THERMISTOR
(OUTDOOR)

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

1

1

2

2

CN71

3

3

4

4

1

1

2

2

CN70

3

3

55°C

(131°F)

2.841

If the voltage does not appear, replace Main PCB.

02-14

Trouble shooting 13

OUTDOOR UNIT Error Method:

Current sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When Input Current Sensor has detected 0A, while Inverter Compressor is
operating at higher than 56rps, after 1minute upon starting the Compressor.
(Except during the defrost operation)

Forecast of Cause :

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

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

NO

YES

Check Point 2 :
Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose.
Check if connector is removed.

Check erroneous connection.
Check if cable is open.

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

OK

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.

Check Point 4 : Replace Main PCB

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

02-15

Trouble shooting 14

OUTDOOR UNIT Error Method:

Trip detection

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Compressor

Detective details:

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.

Forecast of Cause :

1. Defective connection of electric components 2. Outdoor heat exchanger clogged 3. Compressor failure

4. Main PCB failure

Check Point 1 : Check connections of Outdoor unit electrical components

Check if the terminal connection is loose.
Check if connector is removed.
Check erroneous connection.
Check if cable is open.

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

OK

Check Point 2 : Check Heat exchanger

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

OK

Check Point 3 : Check Compressor

Check Compressor. (PARTS INFORMATION 2)

OK

Check Point 4 : Replace Main PCB

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

02-16

Trouble shooting 15

OUTDOOR UNIT Error Method:

Compressor rotor position
detection error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Compressor

Detective details:

If the detected rotor location is out of phase with actual rotor location
more than 90°, 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.

Forecast of Cause :

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

Check Point 1 : Check Noise from Compressor

Turn on Power and check operation noise.

If an abnormal noise show, replace Compressor.

OKOK

Check Point 2 : Check connection of around the Compressor components

For Compressor Terminal, Main PCB

Check if connector is removed.
Check erroneous connection.
Check if cable is open.

(Refer to PARTS INFORMATION 2)

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

OKOK

Check Point 3: Replace Main PCB

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

OKOK

Check Point 4: Replace Compressor

If Check Point 3 do not improve the symptom, change Compressor.

02-17

Trouble shooting 16

OUTDOOR UNIT Error Method:

Outdoor unit fan motor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Outdoor unit Fan motor

Detective details:

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.

Forecast of Cause:

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

4. Outdoor unit fan motor

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.

OK

Check Point 2 : Check ambient temp. around motor

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

>>Upon the temperature coming down, restart operation.

OK

Check Point 3 : Check Outdoor unit fan motor

Check Outdoor unit fan motor. (PARTS INFORMATION 5)

>>If Outdoor unit fan motor is abnormal, replace Outdoor unit fan motor.

OK

Check Point 4 : Check Output Voltage of Main PCB

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

RED

CN800

1
2
3

BLACK

4

WHITE

5

YELLOW

6

BROWN or BLUE

7

FAN MOTOR

FM

Read wire DC voltage

Red - Black

290V (AC115V-10%)~ 360V (AC115+10%)

White - Black

If the voltage is not correct, replace Main PCB.

15 1.5V

02-18

Trouble shooting 17
INDOOR UNIT Error Method:

4-way valve error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB
Heat Ex. temperature thermistor
Room temperature thermistor
4-way valve

Detective details:

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

Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 10degC (20°F)

Heating operation
[Indoor heat exchanger temp.] - [room temp.] < - 10degC (-20°F)

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

Forecast of Cause :

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.

OKOK

Check Point 2 : Check each thermistor

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

>> Check characteristics of thermistor (Refer to Trouble shooting 5, 6),
If defective, replace the thermistor

OKOK

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

[ Solenoid coil ]

Remove CN30 from PCB and check the resistance value of coil.
Resistance value is 1.88k 2.29k (at 20°C (68°F)).

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

[ 4-way valve ]

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.

OKOK

Check Point 4 : Replace Controller PCB

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

02-19

Trouble shooting 18
OUTDOOR UNIT Error Method:

INDOOR UNIT

Discharge temperature error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB
Discharge temperature thermistor

Forecast of Cause :

1. 2/ 3-way valve not opened 2. Capillary tube, strainer clogged

3. Outdoor unit operation failure, foreign matter on heat exchanger

4. Discharge temperature thermistor failure 5. Insufficient refrigerant

6. Main PCB failure

<Cooling operation>

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.

OK

Check Point 2 : Check the capillary tube, strainer

Capillary tube, Strainer(after Capillary) clogging check.

Refer to "Service Parts Information 3".

Detective details:

"Protection stop by "discharge temperature 110degC during compressor
operation"" generated 2 times within 24 hours.

<Heating operation>

Check Point 1 : Check if 2-way valve(liquid side) is open.

If the 2-way valve(liquid side) was closed, open the
2-way valve(liquid side) and check operation.

OK

Check Point 2 : Check the capillary tube, strainer

Capillary tube, Strainer(before Capillary) clogging check.
Refer to "Service Parts Information 3".

OK

Check Point 3 : Check the outdoor unit fan,heat exchanger

Check for foreign object at heat exchanger
Check if fan can be rotated by hand.

Motor check (PARTS INFORMATION 5)

OK

Check Point 4 : Check the discharge thermistor

Discharger thermistor characteristics check.
(Check by disconnecting thermistor from PCB.)

* For the characteristics of the thermistor, refer to the "Trouble shooting 10".

OK

Check Point 5 : Check the refrigerant amount

Leak check

OK

02-20

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

Trouble shooting 19

Forecast of Cause:

1. Power supply failure 2. External cause

Indoor Unit - No Power

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.

OKOK

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.

OK

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC103 - 127V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse in Main PCB.

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

NO

02-21

Trouble shooting 20

Outdoor Unit - No Power

Forecast of Cause:

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.

OKOK

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.

OKOK

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC103 - 127V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse in Main PCB.

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

OK

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

NO

02-22

Trouble shooting 21

Forecast of Cause:

1. Setting/ Connection failure 2. External cause

No Operation (Power is ON)

3. Electrical component defective

Check Point 1 : Check indoor and outdoor installation condition

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.

OK

Turn off Power and check/ correct followings.

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

OK

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.

OKOK

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

02-23

Trouble shooting 22

No Cooling / No Heating

Forecast of Cause:

1. Indoor Unit error 2. Outdoor unit error

3. Effect by surrounding environment

4. Connection pipe / Connection wire failure 5. Refrigeration cycle failure

Check Point 1 : Check Indoor unit

Does Indoor unit Fan run on High fan?

Is Air filter dirty?
Is Heat exchanger clogged?
Check if Energy save function is operated.

OKOK

Check Point 2 : Check Outdoor unit operation

Check if Outdoor unit is operating

Check any objects that obstruct the air flow route.

Check clogged Heat Exchanger.

Is the Valve open?

OKOK

Check Point 3 : Check Site condition

Is capacity of Indoor unit fitted to room size?

Any windows open? or direct sunlight ?

OKOK

Check Point 4 :
Check Indoor/ Outdoor installation condition

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.

OKOK

MPa MPa

Check Point 5 : Check Refrigeration cycle

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 Capillary tube (PARTS INFORMATION 3)

Check Compressor (PARTS INFORMATION 1,2)

Attention

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.

Pipe (In) Pipe (Out)

Pipe (In) Pipe (Out)

02-24

Trouble shooting 23

Forecast of Cause :

1. Abnormal installation (Indoor/ Outdoor)

Abnormal Noise

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

OK

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

Trouble shooting 24

Forecast of Cause:

Water Leaking

Is Main unit installed in stable condition?
Is Fan guard installed normally?

OK

Is Fan broken or deformed?
Is the screw of Fan loose?

Is there any object which obstruct the Fan rotation?

OK

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

OK

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

1. Erroneous installation 2. Drain hose failure

Diagnosis method when water leak occurs

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

OKOK

Is Drain hose connection loose?
Is there a trap in Drain hose?

Is Drain hose clogged?

OKOK

Is Fan rotating?

Diagnosis method when water is spitting out.

Is the filter clogged?

OKOK

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

MPa MPa

02-25

2-4 SERVICE PARTS INFORMATION

SERVICE PARTS INFORMATION 1

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 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

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 capillary tube, strainer is
clogged.
(PARTS INFORMATION 3)

MPa MPa

Abnormal noise

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

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

Replace Compressor

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

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

Replace Compressor

02-26

SERVICE PARTS INFORMATION 2

Inverter Compressor

Check Point 1 : Check Connection

Check terminal connection of Compressor
(loose or incorrect wiring)

Terminal cover opened

C(W)

(BLACK)

S(V)

(WHITE)

R(U)

(RED)

Check Point 2 : Check Winding Resistance

Check winding resistance of each terminal

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

C

Resistance Value :

1.3 at 20°C (68°F)

R

S

Check Point 3 : Replace Main PCB

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

02-27

SERVICE PARTS INFORMATION 3

Outdoor unit Electronic Expansion Valve
( EEV )

Check Point 1 : Check Connections

Check connection of connector (CN40)
( Loose connector or open cable )

EXPANSION
VALVE COIL

EV

CN40

1
2
3
4
5

RED

1

BLUE

2

ORANGE

3

YELLOW

4

WHITE

5

Check Point 2 : Check Coil of EEV

Remove connector, check each winding
resistance of Coil.

Read wire

Resistance value

White - Red

Yellow - Red

Orange - Red

46 4

at 20°C

Blue - Red

Check Point 3 : Check Voltage from Main PCB.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Check Point 4 : Check Noise at start up

Turn on Power and check operation noise.

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

If Resistance value is abnormal, replace EEV.

Check Point 5 : Check Opening and Closing Operation of Valve

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

CLOSE
Example : Hot Gas

Pipe (In)

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

OPEN
Example : Hot Gas

Hi TEMP.

DC

Pipe (In)

Hi TEMP.

Pipe (Out)

Normal TEMP.

Pipe (Out)

Hi TEMP.

Check Point 6 : Check Strainer

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.

Pipe (In) Pipe (Out)

02-28

Pipe (In) Pipe (Out)

SERVICE PARTS INFORMATION 4

Indoor unit fan motor

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 Point 2 : Check resistance of Indoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal.
(Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.

Pin number
(wire color)

1 (Blue)

2 (Yellow)

3 (White)

4 (Black)

5

6 (Red)

Terminal function
(symbol)

Feed back (FG)

Speed command (Vsp)

Control voltage (Vcc)

Earth terminal (GND)

No function

DC voltage (Vm)

SERVICE PARTS INFORMATION 5

Outdoor unit fan motor

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 Point 2 : Check resistance of Outdoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal.
(Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.

Pin number
(wire color)

1 (Red)

2

3

4 (Black)

5 (White)

6 (Yellow)

7 (Brown or Blue)

Terminal function
(symbol)

DC voltage (Vm)

No function

No function

Earth terminal (GND)

Control voltage (Vcc)

Speed command (Vsp)

Feed back (FG)

02-29

WALL MOUNTED type

INVERTER

R410A

3 . APPENDING DATA

3-1. FUNCTION SETTING

3-1-1 INDOOR UNIT

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.

1-1. 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.
If you do not wish the filter sign to be displayed, select the setting value for "No indication".

( Factory setting)

Setting Description

Standard (400 hours)

Long interval (1000 hours)

Short interval ( 200 hours)

No indication

1-2. Cooling Room Temperature Correction

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

Setting Description

Standard

Slightly lower control

Lower control

Warmer control

Function Number Setting Value

11

Function Number Setting Value

30

00

01

02

03

( Factory setting)

00

01

02

03

1-3. Heating Room Temperature Correction

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

Setting Description

Standard

Lower control

Slightly warmer control

Warmer control

Function Number Setting Value

31

03-01

( Factory setting)

00

01

02

03

1-4. Setting the Auto Restart

Enable or disable automatic system restart after a power outage.

( Factory setting)

Setting Description

Yes

No

Function Number Setting Value

00

40

01

*Auto restart is an emergency function such as for power failure etc.
Do not start and stop the indoor unit by this function in normal operation.
Be sure to operate by the control unit, or external input device.

1-5. Remote controller signal code

Change the indoor unit Signal Code, depending on the remote controllers.

( Factory setting)

Setting Description

A

B

C

D

Function Number Setting Value

00

44

01

02

03

03-02

3-1-2 Procedures to change the Function Setting for wireless RC

The function settings of the control of the indoor unit can be changed by this procedure according
to the installation conditions. Incorrect settings can cause the indoor unit malfunction.
After the power is turned on, perform the "FUNCTION SETTING" according to the installation
conditions using the remote controller.
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.

PREPARATION

Turn on the power
*By turning on the power indoor units, so make sure the piping air-tight test and vacuuming
have been conducted before turning on the power.
*Also check again to make sure no wiring mistakes were made before turning on the power.

FUNCTION SETTING METHOD (for Wireless remote controller)
Entering the Function Setting Mode

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

STEP 1.
Setting the Remote controller Signal Code

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

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

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

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

The remote controller resets to signal code when the batteries in the remote controller are replaced.
If you use a signal code other than signal code , 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.

*1

Note :
*1) Small " " is displayed on the right of the signal code during the FUNCTION SETTING.

03-03

STEP 2.
Selecting the Function Number and Setting Value

(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.)

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

Function
Number

*1 *1

Setting Value

(4) Press the SLEEP button, then after you hear the beep emitted from
the indoor unit, press the START/STOP button 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 off 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.

Note :
*1) Small " " is displayed on the right of the signal code during the FUNCTION SETTING.

03-04

REMOTE CONTROLLER SIGNAL CODE SETTING

Use the following steps to select the signal code of the remote controller.
(Note that the air conditioner cannot receive a signal code if the air conditioner
has not been set for the signal code.)

(1) Press the MODE button for at least 5 seconds to display the current signal code.
(initially set to ).

(2) Press the SET TEMP.( ) ( ) button to change the signal code
between .
Match the code on the display to the air conditioner signal code.

(3) Press the MODE button again. The signal code will be changed.

If no buttons are pressed within 30 seconds after the signal code is displayed,
the display returns to the original status. In this case, start again from step 1.

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

The remote controller resets to signal code when the batteries in the remote controller are replaced.
If you use a signal code other than signal code , 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.

03-05

3-2. Thermistor Resistance Values

3-2-1 INDOOR UNIT

Room temperature thermistor

Temp ( C)

Resistance(k )

-10.0 55.46

-5.0 42.36 -25.0 713.2

0.0 32.67 -20.0 526.8

5.0 25.39 -15.0 392.1

10.0 19.91 -10.0 295.1

15.0 15.71 -5.0 223.3

20.0 12.5 0.0 170.7

25.0 10.0 5.0 131.4

30.0 8.051 10.0 102.1

35.0 6.52 15.0 79.81

40.0 5.316 20.0 62.9

45.0 4.354

Voltage(V)

0.76

0.95

1.17

1.41

1.67

1.94

2.22

2.50

2.77

3.03

3.26

3.48 25.0 49.84

Indoor heat exchanger thermistor

Temp ( C)

-30.0 977.6

30.0 39.78

35.0 31.92

40.0 25.8

45.0 20.94

50.0 17.11

55.0 14.05

60.0 11.6

63.0 10.36

3-2-2 OUTDOOR UNIT

Resistance(k )

Voltage(V)

0.24

0.33

0.43

0.56

0.72

0.91

1.13

1.38

1.64

1.92

2.21

2.50

2.78

3.05

3.30

3.52

3.72

3.90

4.06

4.14

Discharge thermistor

Temp ( C)

Resistance(k )

-30.0 920.3

-25.0 676.6

-20.0 503.5

-15.0 377.6

-10.0 286.3

-5.0 218.6

0.0 168.6

5.0 130.9

10.0 102.5

15.0 80.82

20.0 64.22

25.0 51.36

30.0 41.33

35.0 33.64

40.0 27.26

45.0 22.33

50.0 18.40

55.0 15.23

60.0 12.68

65.0 10.60

70.0 8.909

75.0 7.518

80.0 6.375

85.0 5.427

90.0 4.639

95.0 3.981

100.0 3.430

105.0 2.965

110.0 2.573

115.0 2.239

120.0 1.956

Voltage(V)

0.07

0.09

0.13

0.17

0.22

0.28

0.36

0.45

0.56

0.69

0.84

1.01

1.20

1.39

1.61

1.84

2.07

2.30

2.53

2.75

2.97

3.17

3.35

3.53

3.69

3.83

3.96

4.07

4.17

4.27

4.35

Outdoor heat exchanger thermistor

Temp ( C)

Resistance(k )

-30.0 87.21

-25.0 64.16

-20.0 47.78

-15.0 35.86

-10.0 27.21

-5.0 20.80

0.0 16.05

5.0 12.47

10.0 9.775

15.0 7.709

20.0 6.129

25.0 4.903

30.0 3.947

35.0 3.196

40.0 2.606

45.0 2.135

50.0 1.759

55.0 1.457

60.0 1.213

65.0 1.015

70.0 0.8531

75.0 0.7206

80.0 0.6115

Voltage(V)

0.26

0.34

0.45

0.58

0.74

0.93

1.14

1.38

1.64

1.91

2.18

2.46

2.73

2.99

3.23

3.45

3.65

3.83

3.98

4.12

4.24

4.34

4.43

Outdoor temperature thermistor

Temp ( C)

Resistance(k )

-30.0 205.7

-25.0 148.8

-20.0 109.0

-15.0 80.56

-10.0 60.23

-5.0 45.40

0.0 34.57

5.0 26.53

10.0 20.56

15.0 16.04

20.0 12.26

25.0 10.00

30.0 7.978

35.0 6.408

40.0 5.184

45.0 4.216

50.0 3.451

55.0 2.841

Voltage(V)

0.78

1.02

1.30

1.61

1.94

2.29

2.63

2.95

3.25

3.52

3.79

3.96

4.14

4.28

4.40

4.50

4.59

4.65

03-06

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

Mar. 2012 Printed in Japan