Fujitsu AS*G24LFCA, AS*G30LFCA, AS*G24LFCC, AO*G30LFT, AO*G24LFLAO*G24LFCC Service Instruction

SPLIT TYPE
ROOM AIR CONDITIONER

WALL MOUNTED

type

Models Indoor unit Outdoor unit

AS*G24LFCA
AS*G24LFCC
AS*G30LFCA

AO*G24LFL
AO*G24LFCC
AO*G30LFT

INVERTER

SERVICE

INSTRUCTION

R410A

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

18. 10°C HEAT OPERATION............................................................................................

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

19. ECONOMY OPERATION............................................................................................

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

20.

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

01-01
01-02
01-02
01-03
01-04
01-06
01-07
01-08
01-09
01-12
01-12

01-12
01-13
01-13
01-13
01-14
01-14
01-14
01-15
01-17

01-12

2. TROUBLE SHOOTING

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

2-1-1 INDOOR UNIT AND WIRED RMOTE CONTROLLER DISPLAY (OPTION)......

3. APPENDING DATA

2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION).....................................

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

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

02-01
02-01
02-02
02-03
02-26

2-4 SERVICE PARTS INFORMATION.............................................................................. 02-31

22. VARIOUS PROTECTIONS.......................................................................................... 01-18

23. COMPRESSOR STOP CONTROL.............................................................................. 01-20

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

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

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

03-01
03-01
03-03

3-2 Outdoor unit Pressure Value and Total Electric Current Curve................................... 03-05

3-3 Thermistor Resistance Values..................................................................................... 03-09

1 . DESCRIPTION OF EACH
CONTROL OPERATION

R410A

WALL MOUNTED type

INVERTER

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

1. COOLING OPERATION

1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is 2°C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.

minimum
frequency

maximum
frequency

maximum
frequency

AO*G24LFL 15rps 88rps 95rps
AO*G24LFCC 13rps 80rps 111rps

Outside air Outside air
temperature temperature

36°C

A zone

34°C

32°C

B zone

30°C

21°C

C zone

19°C

D zone

Hi Me Lo Quiet
A zone 95rps 74rps 62rps 38rps
B zone 95rps 74rps 62rps 38rps
C zone 95rps 74rps 62rps 38rps

24LFL

30LFT

D zone 68rps 51rps 42rps 26rps
E zone 68rps 51rps 42rps 26rps
F zone 68rps 51rps 42rps 26rps

( Table 1 : Compressor Frequency Range )

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

01-01

E zone

F zone

10°C

0°C

12°C

2°C

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

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

A zone 72rps 49rps 41rps 29rps
B zone 72rps 49rps 41rps 29rps
C zone 55rps 41rps 36rps 29rps
D zone 41rps 36rps 31rps 20rps
E zone 41rps 36rps 31rps 20rps
F zone 41rps 36rps 31rps 20rps

AO*G30LFT 16rps 51rps 72rps

A zone 111rps 67rps 56rps 34rps
B zone 111rps 67rps 56rps 34rps
C zone 111rps 67rps 56rps 34rps

24LFCC

D zone 62rps 47rps 40rps 25rps
E zone 62rps 47rps 40rps 25rps
F zone 62rps 47rps 40rps 25rps

2. HEATING OPERATION

2-1 HEATING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is lower by 3°C than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is some degrees higher 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 )

01-02

minimum
frequency

maximum
frequency

AO*G24LFL

AO*G30LFT

16rps 133rps

16rps 90rps

3. DRY OPERATION

3-1 INDOOR UNIT CONTROL

The compressor rotation frequency shall change according to the temperature, set temperature,
and room temperature variation which the room temperature sensor of the indoor unit body has
detected as shown in the Table3.
However, after the compressor is driven, the indoor unit shall run at operation frequency of
68rps (24L), 43rps (30L), for a minute.

Ts+0.5°C

Ts -1.5°C

Ts -0.5°C

Ts+1.5°C

( Table3 : Compressor frequency )

( Fig.2 : Compressor Control based on Room Temperature )

Operating
frequency

38rps
18rps

0rps

24LFL

X zone
J zone
Y zone

Operating
frequency

J zone
Y zone

X zone 34rps

16rps

0rps

24LFCC

Room Room
temperature temperature

X zone

J zone

Y zone

AO*G24LFCC

14rps 120rps

Operating
frequency

J zone
Y zone

X zone 29rps

16rps

0rps

30LFT

4. AUTO CHANGEOVER OPERATION

01-03

Operation flow chart

START

Room temp.

Room temp.

>Ts+2°C ?

COOLING OPERATION

HEATING OPERATION

YES

YES

NO

NO

NO

NO

YES

YES

TS : Setting temperature

<Ts- 2°C ?

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

NO

NO

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

YES

YES

When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation, the
optimum mode is automatically switched in accordance with temperature changes. The temperature
can be set between 18°C and 30°C in 1°C steps.

5. INDOOR FAN CONTROL

The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH,
while the indoor fan only runs.
When Fan mode is set at [AUTO], it operates on [MED] Fan Speed.

01-04

2. FAN OPERATION

3. COOLING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig. 3.
On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [COOL]
operation modes QUIET, LOW, MED, HIGH, as shown in Table5.

( Fig.3 : 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

1. Fan speed

( Table4 : Indoor Fan Speed )

Operation mode Air flow mode

Speed (rpm)

1480
1320

1220
1020

Cooling/ Fan

Hi

Hi

860
680
270 (480)

1430 (1480)

Me+
Me

Me

Heating

Lo

Lo

1220
1020

Quiet

Quiet

860

1530
1320
1220
1020

900
720

270
1430
1220
1020

900

Dry

S-Lo

X zone: 860

J zone: 780

X zone: 900

J zone: 780

Cool air prevention

AS*G24LFCA(LFCC) AS*G30LFCA

4. DRY OPERATION

Refer to the Table4.
During the dry mode operation, the fan speed setting can not be changed.

The maximum value of the indoor fan speed is set as shown in Fig.5, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.

( Fig.5 : Cool Air Prevention Control )

01-05

5. HEATING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig.4.
On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow
of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table5.

6. COOL AIR PREVENTION CONTROL (Heating mode)

( Fig.4 : Airflow change - over ( Heating : AUTO ) )

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

MED+ mode

42°C

30°C

34°C

Indoor heat exchanger
temperature

Indoor heat exchanger
temperature

Hi

Me+

Lo

Cool air
prevention

39°C
37°C

37°C

32°C

28°C

S-Lo

Switch the airflow [AUTO] at cooling mode, and the indoor fan motor will run as shown in Fig.6.

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

( Fig.6 : Indoor Fan Control )

Compressor

ON

OFF

Indoor fan
Setting air flow

Indoor fan
(as shown in Table 5)

S-Lo

OFF

10 30 60 180 60 180 60 10 30

(SEC)

( Table5 : Indoor fan speed )

X zone J zone

AS*G24LFCA / LFCC 860rpm 780rpm

Y zone

0 270rpm ( 24LFCC: 480rpm) 860rpm

AS*G30LFCA 900rpm 780rpm 0 270rpm 900rpm

Dry

Cooling

Switch the airflow at cooling mode, and the indoor fan motor will run as shown in Fig.6.
It depends on the function setting "Indoor unit fancontrol for energy saving"

8. INDOOR UNIT FAN CONTROL FOR ENEGY SAVING (Cooling mode)

6. OUTDOOR FAN CONTROL

01-06

( Table7 : Outdoor fan speed )

*

The outdoor fan speed mentioned above 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 table8 without relating to the compressor frequency.

( Table8 : Outdoor fan speed after the defrost )

1. Outdoor Fan Motor

2. Fan Speed

AC Motor DC Motor

AO*G24LFL / LFCC / 30LFT

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

( Table6 : Type of Motor )

AO*G24LFL / LFCC 1100rpm

Cooling Heating

AO*G24LFL

AO*G30LFT

D
F

Zone

1050/ 820/ 720/ 500

1100/ 820/ 720/ 550/ 450

900/ 850/ 800/ 620/ 550/ 450

Refer to Fig.7

(rpm)

430/ 350/ 300
G 350/ 290/ 260
H 280/ 250/ 230

D
F

500/ 320/ 250

850/ 800/ 620/ 500/ 400

300/ 230 /200

G
H

220/ 200

Dry

500

550/ 450

AO*G30LFT 900rpm

( Fig.7 : Outside air temperature zone selection )

12°C

0°C

Outside air
temperature

Outside air
temperature

F zone

D zone

G zone

H zone

2°C

- 8°C

10°C

- 10°C

(AS*G24L is nonaction)

AO*G24LFCC

1100/ 1050/ 780/ 720/ 590/ 480

D
F

430/ 370/ 300

1100/ 870/ 720/ 500

350/ 300 /260

G
H

250/ 200

530

7. LOUVER CONTROL

01-07

1. VERTICAL LOUVER CONTROL

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

(Function Range)

Types of Airflow Direction Setting:

Use the air direction adjustments within the ranges shown above.

The Remote Controller's display does not change.

The Remote Controller's display does not change.

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

During Cooling / Dry mode : Horizontal flow
During Heating mode : Downward flow

During AUTO mode operation, for the first a few minutes after beginning operation,
airflow will be horizontal ; the air direction cannot be adjusted during this period.

Only the direction of the Airflow Direction Louver changes; the direction of the Power Diffuser does not change.
The airflow direction setting will temporarily become when the temperature of
the airflow is low at the start of the Heating mode.

Direction

After beginning of AUTO/HEAT mode operated and automatic defrosting operation time,
the air flow will be horizontal .
However, the Airflow Direction cannot be adjusted at beginning AUTO operation mode.

: During Heating/ Cooling/ Dry modes

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

3. SWING OPERATION

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

(Swinging Range)

1 3

1

4

4

6

36

To select Vertical Airflow Swing Operation

To select Horizontal Airflow Swing Operation

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

All mode :

(Swinging Range)

5

1

To select Vertical and Horizontal Airflow Swing Operation

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

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

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

2. HORIZONTAL LOUVER CONTROL

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

(Function Range)

Cooling / Heating / Dry mode / Fan mode

1
2

3

4

5

6

,,,,,

1

2

3

4

5

8. COMPRESSOR CONTROL

01-08

1. OPEARTION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as
shown in the table9.

Cooling Heating

Min Max Min Max Min Max

Dry

AO*G24LFL

AO*G30LFT

15rps 95rps 16rps 133rps 18rps 38rps

16ps 72rps 16rps 90rps 16rps 29rps

AO*G24LFL

40rps 60rps 75rps 93rps 120rps

AO*G30LFT

30rps 47rps 60rps

(Table 9 : Compressor Operation Frequency Range)

2. OPEARTION FREQUENCY CONTROL AT NORMAL START UP

The compressor frequency soon after the start-up is controlled as shown in the Fig.8.

(Fig.8 : Compressor Control at Start-up)

Time

Time Time Time

Time

(Frequency)

Frequency

Frequency

Frequency Frequency

Frequency

Frequency

Frequency

Frequency

Frequency

Frequency

Time

Time Time Time

Time

AO*G24LFL

70sec 180sec 320sec 500sec 550sec

AO*G30LFT

60sec 120sec 180sec

(Time)

AO*G24 LFCC 13rps 111rps 14rps 120rps 16rps 34rps

AO*G24LFCC

35rps 53rps 66rps 82rps 106rps

AO*G24 LFCC

80sec 160sec 300sec 400sec 500sec

9. TIMER OPEARTION CONTROL

1. OPEARTION FREQUENCY RANGE

The table10 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

AS*G24 / LFCC / 30LFCA

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

Operation mode

Stop mode

Set time of timer

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

Operation mode

Stop mode

Set time of timer

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

Operation mode

Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest
to the clock's current timer setting.
The order of operations is indicated by the arrow in the remote control unit's display.

SLEEP timer operation cannot be combined with ON timer operation.

( Table 10 : Timer Setting )

2. PROGRAM TIMER

Stop mode

Stop mode

Stop mode

Operation mode

Operation mode

Set time Set time Set time Set time

01-09

9-1 WIRELESS REMOTE CONTROLLER

3. SLEEP TIMER

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

Set temperature rises

( Ts : Set temperature )

Stop of operation

Set temperature lowers

( Ts : Set temperature )

Ts

Stop of operation

In the cooling operation mode

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

Ts

+1°C

+2°C

Set

60min

In the heating operation mode

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

-4°C

-3°C

-2°C

-1°C

Set

30min

30min

30min

01-10

01-11

9-2 WIRED REMOTE CONTROLLER (OPTION)

The table11 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

AS*G24 / LFCC / 30LFCA

( Table11 : Timer Setting )

1. ON TIMER / OFF TIMER

Same to 8-1 1.ON TIMER / OFF TIMER and shown in those.

2. WEEKLY TIMER

This timer function can set operation times of the each day of the week.
All days can be set together,the weekly timer can be used to repeat the timer setting for all of the days.

3. TEMPERATURE SET BACK TIMER

This timer function can change setting temperature of setting operation times of the each day of the week.
This can be together with other timer setting.

Normal tmp.

ON

OFF

Setting day Setting day Setting day

ON OFF ON OFF ON OFF

Set time Set time

Set back tmp.

Set time Set time

10. ELECTRONIC EXPANSION VALVE CONTROL

The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the Table12.
The compressor frequency, the temperatures detected by the discharge temperature sensor, the
indoor heat exchanger sensor, the outdoor heat exchanger sensor,
and the outdoor temperature sensor.

The expansion valve is set at 480 pulses after 110seconds(24L), 120seconds(30L),
of stopping compressor.

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

11. TEST OPERATION CONTROL

[ Wireless remote controller ]

Under the condition where the air conditioner runs, press the test run button of the remote control,
and the test operation control mode will appear.
During test running, the operation lamp and timer lamp of the air conditioner body twinkle simultaneously.

[ Wired remote controller (Option) ]

If the operation lamp is on, press the Start/Stop button to turn it off.
Press the Master Control and Fan Control buttons at the same time for more than two seconds
to start the test operation.
The operation lamp will light up and "o1" will be displayed on the set temperature display.

[ Release ]

Perform the test operation for 60 minutes.
Pressing the Start/Stop button will stop the test operation.

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

At the time when the air conditioner is switched from the cooling mode to heating mode, the
compressor is stopped, and the four-way valve is switched in 3 minutes later after
the compressor stopped.

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

13. FOUR-WAY VALVE EXTENSION SELECT

01-12

( Table12 : The pulse range of the electronic expansion valve control )

Cooling / Dry mode
Heating mode
Cooling / Dry mode
Heating mode

AO*G24LFL / LFCC

AO*G30LFT

Operation mode Pulse range

between 60 to 480 pulses.
between 60 to 480 pulses.
between 53 to 480 pulses.
between 40 to 480 pulses.

15. MANUAL AUTO OPERATION (Indoor unit body operation)

If MANUAL AUTO Button is set, the operation is controlled as shown in Table13.
If the remote control is lost or battery power dissipated, this function will work without the remote control.

OPERATION MODE Auto changeover
FAN CONT. MODE Auto
TIMER MODE Continuous (No timer setting available)
SETTING TEMP. 24°C
SETTING LOUVER Standard
SWING OFF

(Table13)

01-13

16. FORCED COOLING OPERATION

Forced cooling operation is started when pressing MANUAL AUTO button for 10 seconds or more.
During the forced cooling operation, it operates regardless of room temperature sensor.
Operation LED and timer LED blink during the forced cooling operation. They blink for 1 second ON
and 1 second OFF on both operation LED and timer LED (same as test operation).
Forced cooling operation is released after 60 minutes of starting operation.
The FORCED COOLING OPERATION will start as shown in Table14.

Manual auto operation

OPERATION MODE
FAN CONT. MODE
TIMER MODE
SETTING TEMP.
SETTING LOUVER

SWING

( Table14 )

Forced cooling operation
Cooling
Hi

Initial : Horizontal
(It is changed follow as setting of remote controller)

OFF

Room Temp is not controlled

-

If cooling operation is set, the operation is controlled as shown in Table14.

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

[ Operation contents memorized when the power is interrupted ]

Operation mode
Set temperature
Set air flow
Timer mode and timer time
Set air flow Direction
Swing
ECONOMY operation
10°C HEAT operation

14. AUTO RESTART

01-14

When the outdoor heat exchanger temperature is lower than 0°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 heat exchanger temperature rises to 2°C or greater,
preheating is ended.

17. COMPRESSOR PREHEATING

( Fig.9 : Compressor Preheating )

ON

0°C

2°C

OFF

18. 10°C HEAT OPERATION

The 10°C HEAT operation functions by pressing 10°C HEAT button on the remote controller.
The 10°C HEAT operation is almost the same operation as below settings.

Mode Heating
Setting temperature 10°C
Fan mode AUTO

( Table15 )

19. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller.
The ECONOMY operation is almost the same operation as below settings.

Mode Cooling/ Dry Heating
Target temperature Setting temp.+1°C Setting temp.-1°C

( Table16 )

20. DEFROST OPERATION CONTROL

01-15

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts when the outdoor heat exchanger temperature sensor (Tn) detects
the temperature lower than the values shown in Table17.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table18.

( Table18 : Defrost Release Condition )

Release Condition

Outdoor heat exchanger temperature sensor value is higher than

+13°C

or Compressor operation time has passed 15 minutes.

( Table 17 : Condition of starting Defrost Operation )

1 time defrosting
after starting operation

ST

Defrosting after 2 time
upon starting operation

ND

Compressor integrating operation time

Compressor integrating operation time

Compressor integrating operation time

Less than 17 min. 17 to 57 min. More than 57 min.

Does not operate

- 9°C

(Ta*1 - Tn > 5°C)

- 5°C

Less than 35 min. More than 35min.

Does not operate

Integrating defrost
(Constant monitoring)

More than 210 min.
(For long continuous operation)

Less than 10min.*1
(For intermittent operation)

- 3°C

(and after 30 minutes, if the - 3°C)

More than 210 min.
(For long continuous operation)

- 5°C

(and after 5 minutes, if the - 5°C)

OFF count of the compressor
40 times.

*1 : If the compressor continuous operation time is less than 10 minutes and outdoor air temperature is less than 2°C
once while operating the compressor, the OFF number of the compressor is counted.
If any defrost operated, the compressor OFF count is cleared.

Tn-Tn10 < - 5deg
Tn-Tnb < - 2deg
However, Tn - 6°C

Tn10 : Temperature of continuous operation at 10minutes.
Tnb : Back 5minutes temperature

=

*1 : Ta (Outdoor air temperature)

Tn - 25°C

01-16

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

3. Defrost Flow Chart

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

(Not defrosted for 10 minutes)

Heating operation start : Compressor ON

Outdoor heat exchanger temperature:

Over +13°C

or

Compressor ON time: Maximum 15 minutes

Defrost end

Compressor
integrating
operation:
Over 17 min.

Outdoor
heat exchanger
temperature:
Below - 9°C

Outdoor
heat exchanger
temperature:
Below - 5°C

Compressor
integrating
operation:
Over 35 min.

2nd and later defrost

Integrating defrost

(Constant monitoring)

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

Defrost start

Tn-Tn10 < - 5deg
Tn-Tnb < - 2deg
However, Tn <- 6°C

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

1st defrost

Compressor
integrating
operation:
Over 57 min.

Compressor
integrating
operation:
Over 210 min.

Outdoor
heat exchanger
temperature:
Below - 3°C

Compressor
integrating
operation:
Over 210 min.

Outdoor
heat exchanger
temperature:
Below - 5°C

=

(Ta - Tn > 5°C)

=

(and after 5
minutes,
if the - 5°C)

(and after 30
minutes,
if the - 3°C)

Tn - 25°C

21. OFF DEFROST OPEARTION CONTROL

1. OFF DEFROST OPERATION CONDITION

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

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

OFF Defrost Flow Chart

Heating operation stop

Outdoor heat exchanger temperature :
Below -4°C
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 +13°C

or

Compressor ON time : Maximum 15 minutes

Defrost end

2. OFF DEFROST END CONDITION

Release Condition

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

01-17

22. 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 (24L) or 10rps (30L), and it continues to decrease the frequency
for 20rps (24L) or 10rps (30L) every 120 seconds until the temperature
becomes lower than Temperature .
When the discharge temperature becomes lower than Temperature , the control of the control of the
compressor frequency is released.
When the discharge temperature becomes higher than Temperature , the compressor is stopped
and the indoor unit LED starts blinking.

AO*G24LFL / LFCC / 30LFT

104°C 101°C 110°C

( Table 19 : Discharge Temperature Over Rise Prevension Control / Release Temperature )

Temperature

Temperature

Temperature

2. CURRENT RELEASE CONTROL

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

( Table 20-1 : Current Release Operation Value / Release Value for AO*G24LFL / LFCC / 30LFT )

01-18

[ Heating ]

OT : Outdoor Temperature

[ Cooling ]

AO*G24LFL

OT (Control / Release)

7.0A / 6.5A

7.0A / 6.5A

9.5A / 9.0A

12.0A / 11.5A

50°C
46°C
40°C

OT : Outdoor Temperature

AO*G24LFL

OT (Control / Release)

10.5A / 10.0A

13.0A / 12.5A

15.0A / 14.5A

17.0A / 16.5A

17°C
12°C

5°C

[ Heating ]

OT : Outdoor Temperature

[ Cooling ]

AO*G24LFCC

OT (Control / Release)

7.0A / 6.5A

7.0A / 6.5A

9.5A / 9.0A

12.0A / 11.5A

50°C
46°C
40°C

OT : Outdoor Temperature

AO*G24LFCC

OT (Control / Release)

10.5A / 10.0A

13.0A / 12.5A

15.0A / 14.5A

17.0A / 16.5A

17°C
12°C

5°C

[ Heating ]

OT : Outdoor Temperature

[ Cooling ]

AO*G30LFT

OT (Control / Release)

9.0A / 8.5A

10.0A / 9.5A

13.0A / 12.5A

16.0A / 15.5A

50°C
46°C
40°C

OT : Outdoor Temperature

AO*G30LFT

OT (Control / Release)

11.0A / 10.5A

13.0A / 12.5A

15.0A / 14.5A

18.0A / 17.5A

17°C
12°C

5°C

01-19

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 21 : Anti-freezing Protection Operation / Release Temperature )

Outdoor temperature

Over than 10°C *2

or 12°C *1

Less than 10°C *2

or 12°C *1

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

4°C

7°C

13°C

Temperature

Temperature

01-20

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.

5. HIGH TEMPERATURE AND HIGH PRESSURE 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.

Indoor heat exchange
temperature

[ Control System ]

It returns to the normal operation

Compressor is stopped

53°C

55°C

63°C

50°C

The compressor frequency is
decreased 4rps(24L), 2rps(30L)
every 120seconds.

The compressor frequency is
decreased 25rps(24L), 15rps(30L)
every 120seconds.

6. COMPRESSOR TEMPERATURE PROTECTION

When the compressor temperature sensor detects higher than
110°C(24L),108°C(30L), the compressor is stopped.
The protection is released when the compressor temperature sensor detects 80°C
after 3 minutes of compressor stop.

7. HIGH PRESSURE PROTECTION

When the pressure switch becomes OFF (Open : higher than 4.2 MPa),
the compressor is stopped.
It is released when the pressure switch becomes ON (Close : lower than 3.2 MPa)
after 3 minutes of compressor stop.

For AO*G24LFL / LFCC / 30LFT

23. COMPRESSOR STOP CONTROL

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

( Table 22 : Operation temperature of compressor stop control )

Temperature

AO*G24LFL / LFCC / 30LFT

Cooling Heating

-15°C

Stable zone

2 . TROUBLE SHOOTING

R410A

WALL MOUNTED type

INVERTER

Manual Auto Switch Error

Indoor Room Thermistor Error

Indoor Unit Model Information Error
EEPROM Access Abnormal

Wired Remote Controller
Communication Error

Error Contents

Continuous

Continuous

4 times

Continuous2 times

3 times

3 times

5 times

Continuous2 times1 times

Continuous1 times1 times

Trouble
shooting

Economy
(Green)

Timer
(Orange)

Operation
(Green)

02-01

2-1 ERROR DISPLAY

2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY

1 times

Serial Communication Error

Indoor Unit Fan Motor Error

Indoor Heat Ex. Thermistor Error

Continuous4 times 2 times

Continuous1 times5 times

Continuous

Continuous4 times

7 times

6 times

1 times

Continuous

7 times 3 times

Continuous

7 times 4 times

Continuous

2 times

7 times

A. F. Voltage Error

Discharge Thermistor Error

Heat Ex. Liquid Outlet
Thermistor Error

Outdoor Thermistor Error

Compressor Thermistor Error

Please refer the flashing pattern as follows.
Indoor Unit : AS*G24/ 30LFCA, 24LFCC
The OPERATION, TIMER, ECONOMY lamps operate as follows according to the error contents.

1,2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

Continuous8 times 4 times

Current Sensor Error

Continuous8 times 6 times

High Pressure Switch Error

Continuous10 times 3 times

Compressure Temp. Error

Continuous10 times 5 times

Low Pressure Error

Continuous

Continuous5 times

9 times

9 times

7 times

Compressor Control Error

Outdoor Unit Fan Motor Error

Continuous4 times9 times

Continuous9 times 9 times

4 Way Valve Error

Continuous1 times10 times

Discharge Temp. Error

Over Current Error

Continuous5 times6 times

IPM Error

Indoor Unit Display

Wired Remote
Controller
Display

11

12

32

35

41

42

51

64

65

71

72

73

74

84

86

94

95

97

99

A1

A3

A5

02-02

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

2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION)

1. SELF - DIAGNOSIS

SUMOTU WETH FR SA

Unit number (usually 0)

Error code

ex. Self-diagnosis check

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 MO TU WETH FR SA

Error code

Error history number

01234567

FEdcbA98

ı

ı

Lower

Raise

Trouble shooting 1
OUTDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause:

OK

Indicate or Display:

Refer to error code table.

YESYES

NO

Serial Communication Error
(Serial Reverse Transfer Error)

Outdoor unit Main PCB
Outdoor unit Fan motor

1. Connection failure 2. External cause 3. Main PCB failure 4. Active filter module failure

5. Transistor PCB (IPM) failure 6. Filter PCB failure 7. Outdoor unit Fan motor failure

Check Point 1-1 : Reset the power and operate

Does error indication reappear?

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 2 : Check connection

Check any loose or removed connection line of
between indoor unit and outdoor unit.

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

Check connection condition in control unit.
(If there is loose connector, open cable or mis-wiring)

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC216V(AC240V-10%) - 264V(AC240V+10%) appears
at outdoor unit terminal L - N.

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.

02-03

2-2 TROUBLE SHOOTING WITH ERROR CODE

OK

Check Point 4 : Check serial signal (Reverse transfer signal)

Check serial signal (Reverse transfer signal)

>> Check if indicated value swings between AC90V and AC270V at outdoor unit terminal 1 - 3.
>> If it is abnormal, Check the parts as follows.

- Outdoor unit fan motor (PARTS INFORMATION 5)

- Active filter module (PARTS INFORMATION 4)

- Transistor PCB (IPM) (PARTS INFORMATION 7)

- Filter PCB (Check the wire of CN110)
>> If Outdoor fan motor is abnormal, replace Outdoor unit fan motor and Main PCB.
>> If Active filter module or IPM is abnormal, replace it.
>> If the parts are normal, replace Main PCB.

1
2

3
L
N

RED

WHITE

BLACK

BLACK
WHITE

+

-

Trouble shooting 2
INDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause:

OK

Indicate or Display:

Refer to error code table.

YESYES

NO

OK

Serial Communication Error
(Serial Forward Transfer Error)

Indoor unit Controller PCB

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

Check Point 1-1 : Reset the power and operate

Does error indication reappear?

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 2 : Check connection

Check any loose or removed connection line of
between indoor unit and outdoor unit.

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

Check connection condition in control unit.
(If there is loose connector, open cable or mis-wiring)

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC216V(AC240V-10%) - 264V(AC240V+10%) appears
at outdoor unit terminal L - N.

Check Point 4 : Check serial signal (Forward 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.

When the outdoor unit cannot properly receive the serial signal from
indoor unit for 10 seconds or more.

02-04

1
2

3
L
N

RED

WHITE

BLACK

BLACK
WHITE

+

-

Trouble shooting 3
INDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause:

Check Point 2 : Check Wired Remote Controller and Controller PCB

Check Point 1 : Check the connection of terminal

OKOK

Indicate or Display:

Wired Remote Controller
Communication Error

Indoor unit Controller PCB
Wired Remote Controller (Option)

1. Connection failure 2. Wired Remote Controller failure 3. Controller PCB failure

Check & correct the followings.
Check the connection of terminal between Wired Remote Controller and indoor unit,
and check if there is a disconnection of the cable.

When the indoor unit cannot properly receive the signal from
Wired Remote Controller for 1 minute or more.

02-05

Refer to error code table.

>> 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

Check Voltage at CN6 (terminal 1-3) of Controller PCB.
(Power supply to Remote Control)

02-06

Trouble shooting 4
INDOOR UNIT Error Method:

Indicate or Display:

Indoor Unit Model Information Error
EEPROM Access Abnormal

Refer to error code table.

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 3 : Replace Controller PCB

Check Point 2 :
Check Indoor unit electric components

YESYES

NO

Indoor unit Controller PCB

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 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).

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 power is on and there is some below case.

1. When model information of EEPROM is incorrect.

2. When the access to EEPROM failed.

Trouble shooting 5
INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

Manual Auto Switch Error

Indoor Unit Controller PCB
Indicator PCB
Manual Auto Switch

When the Manual Auto Switch becomes ON for consecutive 30 or
more seconds.

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.

Check Point 2 : Replace Controller PCB and Indicator PCB

If Check Point 1 do not improve the symptom, replace Controller PCB and Indicator PCB
and execute the check operation again.

02-07

Refer to error code table.

Detective Actuators:

Indoor unit Controller PCB
Room temperature thermistor

Detective details:

Room temperature thermistor is open or short is detected always.

Forecast of Cause :

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

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 1 : Check connection of Connector

Check if connector is loose or removed
Check erroneous connection
Check if thermisto r cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

6.58.010.012.515.820.225.933.6

3.594.355.3Resistance value (k )

OK

OK

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

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

If the voltage does not appear, replace Controller PCB and execute the check operation again.

DC

BLACK

BLACK

BLACK
BLACK

1
2

1
2

CN3

CN1

1
2
3

1
2
3

RED

WHITE

H/E Thermistor

Room Temp. Thermistor

02-08

Trouble shooting 6
INDOOR UNIT Error Method:

Indicate or Display:

Indoor Room Thermistor Error

Refer to error code table.

Temperature (°C )

Temperature (°C )

0

40 45 50

51015202530

0.931.271.762.47

60 70 80 90

35

0.70

100

Resistance value (k )

Thermistor Characteristics (Rough value)

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

Detective Actuators:

Indoor unit Controller PCB
Heat exchanger (MID) Thermistor

Detective details:

Heat exchanger (MID) thermistor is open or short is detected always.

Forecast of Cause :

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

Check Point 1 : Check connection of Connector

Check if connector is loose or removed
Check erroneous connection
Check if thermisto r cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

OK

Check Point 2 : Remove connector and check Thermistor resistance value

OK

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

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

If the voltage does not appear, replace Controller PCB and execute the check operation again.

DC

BLACK

BLACK

BLACK
BLACK

1
2

1
2

CN3

CN1

1
2
3

1
2
3

RED

WHITE

H/E Thermistor

Room Temp. Thermistor

02-09

Trouble shooting 7
INDOOR UNIT Error Method:

Indicate or Display:

Indoor Heat Ex. Thermistor Error

Refer to error code table.

31.739.649.762.980.3103134176

17.120.925.6Resistance value (k )

Temperature (°C )

Temperature (°C )

0

40 45 50

5101520253035

3.094.195.788.1211.6

60 70 80 90 100

Resistance value (k )

02-10

Trouble shooting 8
INDOOR UNIT Error Method:

Indicate or Display:

Indoor unit Fan Motor Error

Refer to error code table.

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 1 : Check rotation of Fan

Check Point 2 : Check ambient temp. around motor

OK

OK

OK

Indoor unit Controller PCB
Indoor unit fan motor

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

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.

Check Point 4 : Replace Controller PCB

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

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.

Trouble shooting 9
OUTDOOR UNIT Error Method:

A.F Voltage Error

02-11

Indicate or Display:

Refer to error code table.

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

OKOK

Outdoor unit Main PCB
Active filter module

1. External cause 2. Connector connection failure 3. Main PCB failure 4. Active filter module 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 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.

OKOK

Check Point 3 : Check Active filter module

Check Active filter module. (PARTS INFORMATION 6)

>>If Active filter module is abnormal, replace it.

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

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Outdoor Fan

OK

OK

Check Point 6 : Replace Main PCB

OKOK

Check Point 1 : Check connections of Outdoor Unit Electrical Components

Outdoor unit Main PCB
Compressor

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

3. Outdoor Heat Exchanger clogged 4. Compressor failure 5. Transistor PCB 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 Point 4 : Check Compressor

(PARTS INFORMATION 2)

Check Compressor.

If Check Point 1 5 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.

02-12

Trouble shooting 10
OUTDOOR UNIT Error Method:

IPM Error

Indicate or Display:

Refer to error code table.

Check Point 5 : Check Transistor PCB

OK

OK

(PARTS INFORMATION 7)

Check

Transistor PCB.

Trouble shooting 11
OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

OKOK

17.826.3

20

40.062.679.1101130169Resistance value (k )

151050Temperature (°C )

12.3

30 5040 60

2.003.434.606.278.70Resistance value (k )

120100908070Temperature (°C )

Discharge Thermistor Error

Outdoor unit Main PCB
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 if connector is 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.

02-13

Refer to error code table.

BLACK
BLACK
BLACK
BLACK

BROWN

BROWN

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN61

CN62

CN64

BROWN

BROWN

BLUE

BLUE

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

3
2
1

3
2
1

3
2
1

3
2
1

CN62

BLACK

BLACK

3
2
1

3
2
1

CN65

BROWN

BROWN

3
2
1

3
2
1

CN63

CN64

AO*G24LFL

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN71

CN70

CN73

AO*G24LFCC AO*G30LFT

Trouble shooting 12
OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

OKOK

Compressor Thermistor Error

Outdoor unit Main PCB
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 if connector is 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.

02-14

Refer to error code table.

17.826.3

20

40.062.679.1101130169Resistance value (k )

151050Temperature (°C )

12.3

30 5040 60

2.003.434.606.278.70Resistance value (k )

120100908070Temperature (°C )

BLACK
BLACK
BLACK
BLACK

BROWN

BROWN

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN61

CN62

CN64

BROWN

BROWN

BLUE

BLUE

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

3
2
1

3
2
1

3
2
1

3
2
1

CN62

BLACK

BLACK

3
2
1

3
2
1

CN65

BROWN

BROWN

3
2
1

3
2
1

CN63

CN64

AO*G24LFL

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN71

CN70

CN73

AO*G24LFCC AO*G30LFT

Trouble shooting 13
OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

OKOK

3.844.77

15

5.987.569.6316.121.027.8Resistance value (k )

100-5-10Temperature (°C )

20

3025

Heat Ex. Liquid Outlet Thermistor Error

Outdoor unit Main PCB

Heat exchanger temperature thermistor

When Heat exchanger 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 if connector is 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.

02-15

Refer to error code table.

3.11

35

12.4

5

BLACK
BLACK
BLACK
BLACK

BROWN

BROWN

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN61

CN62

CN64

BROWN

BROWN

BLUE

BLUE

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

3
2
1

3
2
1

3
2
1

3
2
1

CN62

BLACK

BLACK

3
2
1

3
2
1

CN65

BROWN

BROWN

3
2
1

3
2
1

CN63

CN64

AO*G24LFL

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN71

CN70

CN73

AO*G24LFCC AO*G30LFT

Trouble shooting 14
OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

OKOK

12.616.1

5

20.726.935.246.662.3115Resistance value (k )

0-5-10-20Temperature (°C )

10 2015

1.652.363.455.187.97Resistance value (k )

7060504030Temperature (°C )

Outdoor Thermistor Error

Outdoor unit Main PCB
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 if connector is 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.

02-16

Refer to error code table.

BLACK
BLACK
BLACK
BLACK

BROWN

BROWN

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN61

CN62

CN64

BROWN

BROWN

BLUE

BLUE

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

3
2
1

3
2
1

3
2
1

3
2
1

CN62

BLACK

BLACK

3
2
1

3
2
1

CN65

BROWN

BROWN

3
2
1

3
2
1

CN63

CN64

AO*G24LFL

BLACK
BLACK
BLACK
BLACK

BLACK

BLACK

BLACK

BLACK

Thermistor
(Discharge pipe)

Thermistor
(Heat exchanger)

Thermistor
(Outdoor temp.)

Thermistor
(Compressor temp.)

4
3
2
1

3
2
1

3
2
1

3
2
1

3
2
1

4
3
2
1

CN71

CN70

CN73

AO*G24LFCC AO*G30LFT

Trouble shooting 15
OUTDOOR UNIT Error Method:

Current Sensor Error

02-17

Indicate or Display:

Refer to error code table.

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 4 : Replace Main PCB

YES

NO

OK

Outdoor unit Main PCB

Check Point 2 :
Check connections of Outdoor Unit Electrical Components

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

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

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 1-1 : Reset Power Supply and operate

Does Error indication show again?

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)

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

Trouble shooting 16
OUTDOOR UNIT Error Method:

Detective Actuators: Detective details:

Indicate or Display:

02-18

Refer to error code table.

High Pressure Switch Error

Forecast of Cause :

Check Point 1 : Check the high pressure switch connection state

OK

Outdoor unit Main PCB
High Pressure Switch

1. High pressure switch connector disconnection, open

2. High pressure switch characteristics failure

3. Main PCB failure

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

Connector and wiring connection state check
Cable open check

Check Point 2 : Check the high pressure switch characteristics

Switch characteristics check
* For the characteristics of high pressure switch, refer to below.

OK

Check Point 3 : Replace Main PCB

Change Main PCB, and execute the check operation again.

Type of contact

Characteristics of pressure switch

C

H

Pressure

Pressure switch 1

4.2 0.1MPa

3.2 0.15MPa

Contact : Short Open
Contact : Open Short

(24LFL/LFCC/30LFT : CN90 )

02-19

Trouble shooting 17
OUTDOOR UNIT Error Method:

Indicate or Display:

Over Current Error

Refer to error code table.

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

OKOK

Check Point 3: Replace Main PCB

Outdoor unit Main PCB
Compressor
Transistor PCB (IPM)

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

Check Point 2: Check Transistor PCB (IPM)

>> If IPM is abnormal, replace Transistor PCB.

OKOK

Check Point 4: Replace Compressor

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

1. Outdoor unit fan operation defective, foreign matter on hear exchanger,
excessive rise of ambient temperature

2. Main PCB

3. Inverter compressor failure (lock, winding short)

4. Transistor PCB (IPM) failure

"Protection stop by overcurrent generation after inverter compressor start
processing completed'' generated consecutively 10 times.
* The number of generations is reset if the start-up of
the compressor succeeds.

No obstructions in air passages?
Heat exchange fins clogged
Outdoor unit fan motor check
Ambient temperature not raised by the effect of other heat sources?
Discharged air not sucked in?

Check Point 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature

Check IPM. (PARTS INFORMATION 7)

Trouble shooting 18
OUTDOOR UNIT Error Method:

Compressor Control Error

02-20

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 : Check connection of around the Compressor components

OKOK

Check Point 4: Replace Main PCB

Outdoor unit Main PCB
Compressor
Transistor PCB (IPM)

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

4. Transistor PCB (IPM) failure

If Check Point 1,2 or 1 3 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°,
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.

Check Point 1 : Check Noise from Compressor

Turn on Power and check operation noise.

If an abnormal noise show, replace Compressor.

OKOK

Check Point 5: Replace Compressor

If Check Point 4 do not improve the symptom, change Compressor.

OKOK

OKOK

Check Point 3: Check Transistor PCB (IPM)

>> If IPM is abnormal, replace Transistor PCB.

Check IPM. (PARTS INFORMATION 7)

Indicate or Display:

Refer to error code table.

02-21

Trouble shooting 19

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 3 : Check Outdoor unit fan motor

OK

OK

Outdoor Unit Fan Motor Error

Outdoor unit Main PCB
Outdoor unit fan motor

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

4. Outdoor 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.

Check Outdoor unit fan motor. (PARTS INFORMATION 5)
>>If Outdoor Fan Motor is abnormal, replace Outdoor fan motor and Main PCB.

Check Point 4 : 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.

Check Point 2 : Check ambient temp. around motor

OK

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

>>Upon the temperature coming down, restart operation.

Indicate or Display:

Refer to error code table.

Read wire DC voltage
Red - Black

240 ~ 400V (24L)
300 ~ 400V (30L)

White - Black

15 1.5V

CN800
(For 24LFL/ LFCC)
CN801
(For 30LFT)

1
2
3
4
5
6
7

BLACK
WHITE
YELLOW
BROWN

RED

FM

FAN MOTOR

AO*G24LFL / LFCC / 30LFT

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

OKOK

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

5. 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 3 : Check the solenoid coil and 4-way valve

02-22

[ Solenoid coil ]
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.

[ 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 Main PCB

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

Check Point 2 : Check thermistor of Indoor unit

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

>> Check characteristics of thermistor, (Refer to Trouble shooting 6,7),
If defective, replace the thermistor.

Indoor unit Controller PCB
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.
Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 20degC
Heating operation
[indoor heat exchanger temp.] - [Room temp.] < -20degC
If the same operation is repeated 5 times,
the compressor stops permanently.

Trouble shooting 20
OUTDOOR UNIT Error Method:

4-Way Valve Error

Indicate or Display:

Refer to error code table.

<Cooling operation>

OK

OK

OK

OK

OK

OK

<Heating operation>

Discharge temperature thermistor
Outdoor unit Main PCB

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

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

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

* For the characteristics of the thermistor, refer to the "Trouble shooting 11".

Check Point 4 : Check the discharge thermistor

EEV open?
Strainer clogging check

(Refer to PARTS INFORMATION 3)

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)

Check Point 2 : Check the EEV, strainer

Check Point 5 : Check the refrigerant amount

Leak check

EEV open?
Strainer clogging check

(Refer to PARTS INFORMATION 3)

Check Point 2 : Check the EEV, strainer

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

02-23

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

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

OK

1. 3-way valve not opened 2. EEV defective, strainer clogged

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

4. Discharge temperature thermistor failure 5. Insufficient refrigerant

6. Main PCB failure

Detective Actuators:

Detective details:

Forecast of Cause :

Trouble shooting 21
OUTDOOR UNIT Error Method:

Discharge Temp. Error

Indicate or Display:

Refer to error code table.

Check Point 6 : Replace Main PCB

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

<Cooling operation>

OK

OK

OK

OK

OK

OK

<Heating operation>

Compressor temperature thermistor
Outdoor unit Main PCB

"Protection stop by
"compressor temperature 110degC(24L), 108degC(30L) during
compressor operation"" generated 2 times within 24 hours.

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

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

* For the characteristics of the thermistor, refer to the "Trouble shooting 12".

Check Point 4 : Check the discharge thermistor

EEV open?
Strainer clogging check

(Refer to PARTS INFORMATION 3)

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)

Check Point 2 : Check the EEV, strainer

Check Point 5 : Check the refrigerant amount

Leak check

EEV open?
Strainer clogging check

(Refer to PARTS INFORMATION 3)

Check Point 2 : Check the EEV, strainer

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

02-24

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

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

OK

Detective Actuators:

Detective details:

Forecast of Cause :

Trouble shooting 22
OUTDOOR UNIT Error Method:

Compressor Temp. Error

Indicate or Display:

Refer to error code table.

1. 3-way valve not opened 2. EEV defective, strainer clogged

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

4. Compressor temperature thermistor

failure 5. Insufficient refrigerant

6. Main PCB failure

Check Point 6 : Replace Main PCB

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

<Cooling operation>

<Heating operation>

Suction pressure sensor
Outdoor unit Main PCB

"Protection stop by suction pressure 0.02MPaG continued for 5 minutes
repeats 5 times within 2 hours.

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

Suction pressure sensor characteristics check
* For the characteristics of the suction pressure sensor.

(Refer to PARTS INFORMATION 8)

Check Point 5 : Check the suction pressure sensor

Check Point 6 : Check the refrigerant amount

Leak check

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

02-25

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

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

OK

OK

OK

OK

OK

OK

OK

Detective Actuators:

Detective details:

Forecast of Cause :

Trouble shooting 23
OUTDOOR UNIT Error Method:

Low Pressure Error

Indicate or Display:

Refer to error code table.

EEV operation check
Strainer not clogged?

(Refer to PARTS INFORMATION 3)

Check Point 4 : Check the EEV, strainer clogging

EEV operation check
Strainer not clogged?

Refer to PARTS INFORMATION 3

Check Point 2 : Check the EEV, strainer clogging

Check Point 2 : Check the outdoor unit ambient temperature

Outdoor ambient temperature lower than operating range?

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

For AOTG34LFT

1. 3-way valve not opened 2. Outdoor unit ambient temperature too low

3. Outdoor unit fan operation defective, foreign matter at heat exchanger

4. EEV defective, strainer clogged 5. Solenoid valve defective

6. Low pressure sensor characteristics defective 7. Insufficient refrigerant

8. Main PCB failure

No foreign object in air passage?
Heat exchange fins clogged
Fan rotates?
Outdoor unit fan motor check

Check Point 7 : Replace Main PCB

If Check Point 1- 6 do not improve the symptom, replace Main PCB.

Trouble shooting 24

Forecast of Cause:

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.

02-26

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

Check Point 3 : Check Electrical Components

YESYES

NO

Check the voltage of power supply.

>> Check if AC216 - 264V appears at Outdoor Unit Terminal L - N.

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.
Upon checking the normal power supply, replace Varistor.

OK

Check Fuse in Filter PCB.

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

Trouble shooting 25

Forecast of Cause:

Check Point 3 : Check Electrical Components

OKOK

OKOK

YESYES

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 AC216 - 264V appears at Outdoor Unit Terminal L - N.

Check Fuse in Main PCB.

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

Check Active Filter Module and IPM. (PARTS INFORMATION 6 and 7)

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

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

02-27

Trouble shooting 26

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 Wired Remote Controller and Controller PCB

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, 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.

02-28

Check Voltage at CN6 (terminal 1-3) of Controller PCB.
(Power supply to Remote Control)

Attention

Trouble shooting 27

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
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 3)
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.

02-29

Trouble shooting 28

Forecast of Cause :

Trouble shooting 29

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?

02-30

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 Main PCB, connection of

Compressor, and winding resistance.

(Refer to the next page).

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

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 3)

>> 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.

02-31

2-4 SERVICE PARTS INFORMATION

SERVICE PARTS INFORMATION 2

Inverter Compressor

02-32

Check Point 1 : Check connection

Check Point 2 : Check winding resistance

Check Point 3 : Replace Inverter PCB

U(R)

V(S)

W(C)(T)

Check terminal connection of Compressor
(Loose or incorrect wiring)

Check winding resistance of each terminal

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

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

U(R)

(RED)

V(S)

(WHITE)

W(C)(T)

(BLACK)

Transistor PCB (IPM)

Check connection of Transisitor PCB(IPM).
(Loose or incorrect wiring)

TM303TM304

TM305

RED

WHITE

BLACK

Compressor

Transistor PCB (IPM)

Resistance Value :

0.921 at 25°C

AO*G24LFL / LFCC

Resistance Value :

0.642 at 20°C

AO*G30LFT

SERVICE PARTS INFORMATION 3

Check Point 2 : Check Coil of EEV

Yellow - Red
Orange - Red
Blue - Red

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

at 20°C

Outdoor unit Electronic Expansion Valve
( EEV )

Check connection of connector
( 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.

02-33

AO*G24LFL / LFCC / 30LFT

CN700

EXPANSION
VALVE COIL

EV

RED
BLUE
ORANGE
YELLOW
WHITE

1
2
3
4
5

SERVICE PARTS INFORMATION 5

Check Point 1 : Check rotation of Fan

Outdoor unit fan motor

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)

Terminal function
(symbol)

1 (Red)
2
3
4 (Black)
5 (White)
6 (Yellow)
7 (Brown)

DC voltage (Vm)
No function
No function
Earth terminal (GND)
Control voltage (Vcc)
Speed command (Vsp)
Feed back (FG)

SERVICE PARTS INFORMATION 4

Check Point 1 : Check rotation of Fan

Indoor unit fan motor

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)

Terminal function
(symbol)

1 (Blue)
2 (Yellow)
3 (White)
4 (Black)
5
6 (Red)

Feed back (FG)
Speed command (Vsp)
Control voltage (Vcc)
Earth terminal (GND)
No function
DC voltage (Vm)

02-34

SERVICE PARTS INFORMATION 6

Active filter module

02-35

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

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

L2L1

P

N

+IN

Check the Output DC voltage (between P and N) 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

(+IN)

(+IN)

( IN)

( IN)

Tester(+) Tester(-)

Check the open or short-circuit

L2

P

P

N

L2

L2

Check the diode

0

360k

720k

1.69M /

20%

+

-

360k

20%

+

-

20%

+

-

(Ref. value 1)

1.88M

(Ref. value 2)

1.40M /

(Ref. value 1)

2.28M

(Ref. value 2)

Terminal

Resistance value

Tester(+) Tester(-)

1.32M /

(Ref. value 1)

1.50M

(Ref. value 2)

1.40M /

(Ref. value 1)

1.51M

(Ref. value 2)

Ref. value 1
Specifications for Multimeter
Manufacturer : HIOKI
Model name : 3804
Power source : DC9V.

Ref. value 2
Specifications for Multimeter
Manufacturer : YOKOGAWA
Model name : 7534
Power source : DC3V.

-IN

SERVICE PARTS INFORMATION 7

IPM
(

Mounted on Transistor PCB)

02-36

Check Point 1

Check Point 2

Terminal

Resistance value

Tester(+) Tester(-)

 Disconnect the connection wires between the Transistor
PCB - Capacitor PCB and Transistor PCB - Inverter
Compressor.

 Set the tester to the "Resistance" mode, and measure
the resistance between the following terminals.

Set the tester to the "Diode" mode, and measure the voltage value between the following terminals.

 Judge the result of as follows:

Judge the result of as follows:

TM301 (P) - TM305(U) / TM304(V) / TM303(W)
TM302 (N) - TM305(U) / TM304(V) / TM303(W)

P
P
P
U
V
W
N
N
N
U
V
W

U
V
W
P
P
P
U
V
W
N
N
N

Over 2k
(Including )

Over 2k
(Including )

Over 20k
(Including )

Terminal

Tester display

Tester(+) Tester(-)

P
P
P
U
V
W
N
N
N
U
V
W

U
V
W
P
P
P
U
V
W
N
N
N

0.3V 0.7V

SERVICE PARTS INFORMATION 8

Suction Pressure Sensor

02-37

Check Point 1 : Check Voltage from Main PCB

With the connector connected to the PCB, measure the voltage between
CN91(terminal 3-4) of the Main PCB.

DC

DC

Characteristics of pressure sensor

4.5

5.0

0.5
0

Output [DCV]

Pressure [MPa]

1
2
3
4

1
2
3
4

WHITE

PRESSURE SENSOR

BLACK

RED

PS

CN91

2.5

2.5

3 . APPENDING DATA

R410A

WALL MOUNTED type

INVERTER

03-01

3-1. FUNCTION SETTING

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.

3-1-1 INDOOR UNIT

( Factory setting)

Setting Description

Function Number Setting Value
Standard (400 hours)
Long interval (1000 hours)
Short interval ( 200 hours)
No indication

11

00
01
02
03

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

Function Number Setting Value
Standard
Slightly lower control
Lower control
Warmer control

30

00
01
02
03

1-2. Setting the 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.

( Factory setting)

Setting Description

Function Number Setting Value
Standard
Lower control
Slightly warmer control
Warmer control

31

00
01
02
03

1-3. Setting the 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.

03-02

( Factory setting)

Setting Description

Function Number Setting Value

Yes
No

40

00
01

( Factory setting)

Setting Description

Function Number Setting Value

No
Yes

42

00
01

1-4. Setting the Auto Restart

Enable or disable automatic system restart after a power outage.

( Factory setting)

Setting Description

Function Number Setting Value

No
Yes

49

00
01

1-8. Indoor unit fan control for energy saving

Enable or disable indoor unit fan control when the outdoor unit is stopped.

1-5. Setting the Indoor room temperature sensor switching function
(Only for Wired remote controller)

The following settings are needed when use the control by
Wired remote controller temperature sensor.

( Factory setting)

Setting Description

Function Number Setting Value

A
B
C
D

44

00
01
02
03

1-6. Setting the Remote controller signal code

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

( Factory setting)

Setting Description

Function Number Setting Value

Operation/Stop mode
(Setting forbidden)
Forced stop mode

46

00
01
02

1-7. Setting the External input control

"Operation/Stop" mode or "Forced stop" mode can be elected.

* 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
controller unit sensor.

* If setting value is "00":
When the outdoor unit is stopped, the indoor unit fan operates following the setting on the
remote controller continuously.
* If setting value is "01":
When the outdoor unit stopped, the indoor unit fan operates at very low speed intermittently.

*AS*A24LFCA does not have this function.
Factry setting: No

10°C HEAT

10°C HEAT

10°C HEAT

03-03

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

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.

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

(2) Press the SET TEMP. ( ) ( ) buttons to select the Function Number.
(Press the MODE button to switch between the left and right digits.)

(3) Press the FAN button to proceed to Setting Value.
(Press the FAN button again to return to the Function Number selection.)

Selecting the Function Number and Setting Value

(6) Press the START/STOP button. It makes a signal to indoor unit.
(Indoor unit run the setting.)

(7) Press the RESET button to cancel the function setting mode.
(8) 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.

(4) Press the SET TEMP. ( ) ( ) buttons to select the Setting Value.
(Press the MODE button to switch between the left and right digits.)

Function Number

Setting Value

(1) Press the MODE button, and proceed to Fanction Number
and Setting Value.
(There is no necessity for setting remote control signal code. Because
signal code is setting by Fanction Number and Setting Value.)

(5) Press the TIMER MODE button. It makes a signal to indoor unit.
(Indoor unit recognize the setting.)

10°C HEAT

1
0
°

C
H

E
A
T

03-04

(1) Press the MODE button for more then 5 seconds.

(3) Press the MODE button. (Return to normal display)

Custom code setting for remote controller

(2) 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 you change the setting of Fanction Number and Setting Value
after setting custom code in remote controller, please set custom
code in remote controller again.
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.

CAUTION

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

Model Name : AS*G24LFCA / LFCC

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping

length

7.5m * (Height difference 1m)˴AS*G24LFCC: 5m

Power

voltage

50Hz - 240V

Operation

condition

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

Measuring

m

ethod

Caution

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

[Constant Frequency Operation Method (Test mode)]

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

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

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

AS*G24LFCA

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

AS*G24LFCA

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

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

03-05

0.5

0.6

0.7

0.8

0.9

1.0

1.1

16 18 20 22 24 26 28 30 32

Low-pressure of outdoor unit [MPa]

[50Hz-240V]

RH70%
RH60%
RH50%

In/Outdoor ambient temperature [ C]

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

16 18 20 22 24 26 28 30 32

In/Outdoor ambient temperature [ C]

Outdoor total electric current [A]

RH70%
RH60%
RH50%

[50Hz-240V]

3-2. Outdoor unit Pressure Value and Total Electric Current Curve

AS*G24LFCC

0.6

0.7

0.8

0.9

1.0

1.1

1.2

16 18 20 22 24 26 28 30 32

Low-pressure of outdoor unit [MPa]

[50Hz-240V]

RH70%
RH60%
RH50%

In/Outdoor ambient temperature [ C]

AS*G24LFCC

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

16 18 20 22 24 26 28 30 32

In/Outdoor ambient temperature [ C]

Outdoor total electric current [A]

RH70%
RH60%
RH50%

[50Hz-240V]

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

Model Name : AS*G24LFCA / LFCC

[Condition]
Ambient

temperatur

e

Indoor 15, 20, 23 C, Outdoor 2, 7, 12 C

Refrigerant

amount

Standard amount

Piping

7.5m * (Height difference 1m)˴AS*G24LFCC: 5m

Power

voltage

50Hz - 240V

Operation

con

diti

on

TEST mode (Heating), Hi Fan, One step up from lower direction, Front air flow

Measuring

method

Caution

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

[Constant Frequency Operation Method (Test mode)]

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

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

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

AS*G24LFCA

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

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

length

03-06

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

02468101214

High-pressure of outdoor unit [MPa]

[50Hz-240V]

Outdoor ambient temperature [ C]

8.0

8.5

9.0

9.5

10.0

10.5

11.0

11.5

12.0

[50Hz-240V]

23 C
20 C
15 C

Indoor ambient
temperature[ C]

Outdoor ambient temperature [ C]

Outdoor total electric current [A]

02468101214

13.0

12.5

AS*G24LFCA

23 C
20 C
15 C

Indoor ambient
temperature[ C]

AS*G24LFCC

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

02468101214

High-pressure of outdoor unit [MPa]

[50Hz-240V]

Outdoor ambient temperature [ C]

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

[50Hz-240V]

23 C
20 C
15 C

Indoor ambient
temperature[ C]

Outdoor ambient temperature [ C]

Outdoor total electric current [A]

02468101214

12.0

11.5

AS*G24LFCC

23 C
20 C
15 C

Indoor ambient
temperature[ C]

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

Model Name : AS*G30LFCA

[Condition]
Ambient

temperature

Indoor / Outdoor - Same temperature

Refrigerant

amount

Standard amount

Piping

length

7.5m (Height difference 1m)

Power

voltage

50Hz - 240V

Operation

condition

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

Measuring

m

ethod

Caution

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

[Constant Frequency Operation Method (Test mode)]

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

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

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

AS*G30LFCA

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

AS*G30LFCA

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

03-07

0.7

0.8

0.9

1.0

1.1

1.2

1.3

16 18 20 22 24 26 28 30 32

Low-pressure of outdoor unit [MPa]

[50Hz-240V]

RH70%
RH60%
RH50%

In/Outdoor ambient temperature [ C]

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

11.0

16 18 20 22 24 26 28 30 32

In/Outdoor ambient temperature [ C]

Outdoor total electric current [A]

RH70%
RH60%
RH50%

[50Hz-240V]

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

Model Name : AS*G30LFCA

[Condition]
Ambient

temperatur

e

Indoor 15, 20, 23 C, Outdoor 2, 7, 12 C

Refrigerant

amount

Standard amount

Piping 7.5m (Height difference 1m)

Power

voltage

50Hz - 240V

Operation

con

diti

on

TEST mode (Heating), Hi Fan, One step up from lower direction, Front air flow

Measuring

method

Caution

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

[Constant Frequency Operation Method (Test mode)]

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

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

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

AS*G30LFCA

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

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

length

03-08

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

3.3

3.4

02468101214

High-pressure of outdoor unit [MPa]

[50Hz-240V]

Outdoor ambient temperature [ C]

9.0

9.5

10.0

10.5

11.0

11.5

12.0

12.5

13.0

[50Hz-240V]

23 C
20 C
15 C

Indoor ambient
temperature[ C]

Outdoor ambient temperature [ C]

Outdoor total electric current [A]

02468101214

14.0

13.5

AS*G30LFCA

23 C
20 C
15 C

Indoor ambient
temperature[ C]

Characteristics of room temperature thermistor

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

(0.00) (10.00) (20.00) (30.00) (40.00) (50.00) (60.00)

Resistance(k )

Temperature F( C)

32

50

68 86

104 122

140

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

160.00

180.00

(0.00) (20.00) (40.00) (60.00) (80.00)

Resistance(k )

32

68

104

140

176

Temperature F( C)

Characteristics of heat exchanger thermistor
(Indoor)

Characteristics of discharge thermistor

03-09

32.0

41.0

50.0

59.0

68.0

77.0

86.0

95.0

104.0

113.0

122.0

131.0

140.0

149.0

158.0

167.0

176.0

185.0

194.0

203.0

212.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

95.0

100.0

33.62

25.93

20.18

15.84

12.54

10.00

8.04

6.51

5.30

4.35

3.59

2.98

2.47

2.09

1.76

1.49

1.27

1.09

0.93

0.81

0.70

1.15

1.39

1.66

1.94

2.22

2.50

2.77

3.03

3.27

3.48

3.68

3.85

4.00

4.14

4.25

4.35

4.44

4.51

4.57

4.63

4.67

Room temperature thermistor

Voltage(V)Resistance(K )Tempe F Tempe C

32.0

41.0

50.0

59.0

68.0

77.0

86.0

95.0

104.0

113.0

122.0

131.0

140.0

149.0

158.0

167.0

176.0

185.0

194.0

203.0

212.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

95.0

100.0

176.03

134.23

103.34

80.28

62.91

49.70

39.57

31.74

25.64

20.85

17.06

14.10

11.64

9.69

8.12

6.83

5.78

4.91

4.19

3.59

3.09

1.10

1.36

1.63

1.92

2.21

2.51

2.79

3.06

3.30

3.53

3.73

3.90

4.55

4.19

4.30

4.40

4.48

4.55

4.61

4.66

4.71

Indoor heat exchanger thermistor

Voltage(V)Resistance(K )Tempe F Tempe C

-22.0

-13.0

-4.0

5.0

14.0

23.0

32.0

41.0

50.0

59.0

68.0

77.0

86.0

95.0

104.0

113.0

122.0

131.0

140.0

149.0

158.0

167.0

176.0

185.0

194.0

203.0

212.0

221.0

230.0

239.0

248.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

95.0

100.0

105.0

110.0

115.0

120.0

Discharge thermistor

Voltage(V)Resistance(K )Tempe F Tempe C

-22.0

-13.0

-4.0

5.0

14.0

23.0

32.0

41.0

50.0

59.0

68.0

77.0

86.0

95.0

104.0

113.0

122.0

131.0

140.0

149.0

158.0

167.0

176.0

185.0

194.0

203.0

212.0

221.0

230.0

239.0

248.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

95.0

100.0

105.0

110.0

115.0

120.0

Compressor temperature thermistor

Voltage(V)Resistance(K )Tempe F Tempe C

0.00

200.00

400.00

600.00

800.00

1000.00

(-30.00) (0.00) (30.00) (60.00) (90.00) (120.00)

-22

32

86 140

194

248

Temperature F( C)

Characteristics of compressor thermistor

Resistance(k )

0.00

200.00

400.00

600.00

800.00

1000.00

(-30.00) (0.00) (30.00) (60.00) (90.00) (120.00)

-22

32

86 140

194

248

Temperature F( C)

Resistance(k )

3-3. Thermistor Resistance Values

1013.11 0.06

729.09 0.09

531.56 0.12

392.31 0.16

392.91

0.21

221.09 0.28

168.60 0.36

129.84 0.46

100.91 0.57

79.12 0.71

62.55 0.86

49.84

1.03

40.01 1.23

32.35 1.43

26.34 1.65

21.58 1.88

17.79 2.11

14.75 2.34

12.30

2.57

10.32 2.79

8.70 3.00

7.36 3.19

6.27

3.37

5.36

3.54

4.60

3.69

3.96

3.83

3.43

3.96

2.98

4.07

2.60

4.17

2.27 4.26

2.00 4.33

1013.11 0.06

729.09 0.09

531.56 0.12

392.31 0.16

392.91

0.21

221.09 0.28

168.60 0.36

129.84 0.46

100.91 0.57

79.12 0.71

62.55 0.86

49.84

1.03

40.01 1.23

32.35 1.43

26.34 1.65

21.58 1.88

17.79 2.11

14.75 2.34

12.30

2.57

10.32 2.79

8.70 3.00

7.36 3.19

6.27

3.37

5.36

3.54

4.60

3.69

3.96

3.83

3.43

3.96

2.98

4.07

2.60

4.17

2.27 4.26

2.00 4.33

0.00

20.00

40.00

60.00

80.00

100.00

(-30.00) (-10.00) (10.00) (30.00) (50.00) (70.00)

Characteristics of heat exchanger thermistor
(Outdoor)

Resistance(k )

Temperature F( C)

-22

14

50 86

122 158

03-10

-22.0

-13.0

-4.0

5.0

14.0

23.0

32.0

41.0

50.0

59.0

68.0

77.0

86.0

95.0

104.0

113.0

122.0

131.0

140.0

149.0

158.0

167.0

176.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

-22.0

-13.0

-4.0

5.0

14.0

23.0

32.0

41.0

50.0

59.0

68.0

77.0

86.0

95.0

104.0

113.0

122.0

131.0

140.0

149.0

158.0

167.0

176.0

-30.0

-25.0

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

Outdoor heat exchanger thermistor

Voltage(V)Resistance(K )Tempe F Tempe C

Outdoor Temprature thermistor

Voltage(V)Resistance(K )Tempe F Tempe C

0.00

40.00

80.00

120.00

160.00

200.00

(-30.00) (-10.00) (10.00) (30.00) (50.00)

Characteristics of outdoor temperature
thermistor

Resistance(k )

Temperature F( C)

-22

14

50 86

122

95.58 0.24 224.33 0.73

159.71 0.97

115.24 1.25

84.21 1.56

62.28 1.90

46.58 2.26

35.21 2.61

26.88 2.94

20.72 3.25

16.12 3.52

12.64 3.76

10.00 3.97

7.97 4.14

6.40 4.28

5.18 4.41

4.21 4.51

3.45 4.59

2.85 4.65

2.36 4.71

1.97 4.76

1.65 4.79

1.39 4.83

1.18 4.85

68.90 0.32

50.31 0.43

37.19 0.57

27.81 0.73

21.02 0.92

16.05 1.14

12.38 1.39

9.63 1.65

7.56 1.93

5.98 2.21

4.77 2.49

3.84 2.77

3.11 3.02

2.53 3.26

2.08 3.48

1.71 3.68

1.42 3.85

1.19 4.00

1.00 4.13

0.84 4.25

0.71 4.35

0.61 4.43

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

Oct. 2012 Printed in Japan