Fujitsu AS* A09LEC, AS* A12LEC, AO* R09LECN, AO* R12LECN Service Instruction

SPLIT TYPE ROOM AIR CONDITIONER

WALL MOUNTED

type

Models Indoor unit Outdoor unit

AS* A09LEC AS* A12LEC

AO* R09LECN AO* R12LECN

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. COIL DRY OPEARTION CONTROL...........................................................................

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

21. BASE HEATER OPERATION......................................................................................

01-01

01-02

01-03

01-04

01-05

01-07

01-08

01-09

01-10

01-13

01-14

01-15

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

24. VARIOUS PROTECTIONS..........................................................................................

23. OFF DEFROST OPERATION CONTROL...................................................................

01-16

01-18

01-19

01-13

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

02-02

02-03

02-24

2-4 SERVICE PARTS INFORMATION.............................................................................. 02-29

19. 10°C HEAT OPERATION............................................................................................

20. ECONOMY OPERATION............................................................................................

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

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

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

03-01

03-03

3-2 Thermistor Resistance Values.................................................................................... 03-05

1 . DESCRIPTION OF EACH CONTROL OPERATION

R410A

WALL MOUNTED type

INVERTER

( Fig. 1 : Limit of maximum speed 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 speed of the compressor. * If the room temperature is 2°C higher than a set temperature, the compressor operation speed will attain to maximum performance.

Minimum

speed

Maximum

speed

Maximum

speed

ASYA09LEC 18rps 62rps 64rps

ASYA12LEC 18rps 80rps 96rps

When outdoor temperature drops

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 64rps 50rps 42rps 30rps

B zone 64rps 50rps 42rps 30rps

C zone 64rps 50rps 42rps 30rps

09LEC

D zone 42rps 35rps 30rps 23rps

A zone 96rps 61rps 51rps 33rps

B zone 96rps 61rps 51rps 33rps

C zone 96rps 61rps 51rps 33rps

12LEC

D zone 57rps 42rps 36rps 27rps

( Table 1 : Compressor speed range )

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

01-01

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

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

10°C

E zone

F zone

0°C

12°C

2°C

When outdoor temperature rises

F zone

E zone

F zone

E zone

52rps 45rps 40rps 29rps

57rps 42rps 36rps 27rps

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 speed of the compressor. * If the room temperature is lower by 3°C than a set temperature, the compressor operation speed will attain to maximum performance.

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

* When the room temperature is between +2.5°C to -3°C of the setting temperature, the compressor speed is controlled within the range shown in Table2. However, the maximum speed is limited in the range shown in Figure 2 based on the fan speed mode and the outdoor temperature.

( Table 2 : Compressor speed range )

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

* The room temperature is controlled 2°C higher than the setting temperature for 60 minutes after starting the operation. After 60 minutes, it is controlled based on the normal setting temperature.

01-02

Minimum

speed

Maximum

speed

ASYA09LEC 18rps 119rps

ASYA12LEC

18rps 119rps

Hi Me+ Lo Quiet

AA zone

119rps 119rps 64rps 55rps

A zone

119rps 119rps 64rps 55rps

B zone

119rps 119rps 64rps 45rps

09LEC

C zone

AA zone

A zone

B zone

C zone

119rps 119rps 64rps 37rps

119rps 119rps 80rps 68rps

119rps 119rps 80rps 54rps

119rps 119rps

85rps

96rps

96rps 80rps 45rps

12LEC

17°C

C zone

B zone

A zone

AA zone

19°C

12°C

14°C

5°C

7°C

When outdoor temperature rises

When outdoor temperature drops

3. DRY OPERATION

3-1 INDOOR UNIT CONTROL

The compressor rotation frequency shall change according to the temperature, set temperature, and room temperature variation which the room temperature sensor of the indoor unit body has detected as shown in the Table 3. However, after the compressor is driven, the indoor unit shall run at operation frequency of 52rps (for ASYA09LEC) or 61rps (for ASYA12LEC) , for a minute.

Ts+0.5°C

Ts -1.5°C

Ts -0.5°C

Ts+1.5°C

( Table 3 : Compressor frequency )

( Fig.3 : Compressor control based on room temperature )

01-03

Operating

speed

30rps

23rps

0rps

09LEC

X zone

J zone

Y zone

Operating

speed

J zone

Y zone

X zone

33rps

25rps

0rps

12LEC

Room Room temperature drops temperature rises

X zone

J zone

Y zone

4. AUTO CHANGEOVER OPERATION

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

When operation starts, only the indoor and outdoor fans are operated for 1 minute. After 1 minute,

the room temperature and outdoor temperature are sensed and the operation mode is selected in accordance with the table below.

C zone

32°C

B zone

-10°C

A zone

( Table.4 Operation mode selection table)

Outdoor temperature (TO)

Indoor room temperature (TB)

A zone B zone C zone

TB > TS+2°C

Monitoring

Cooling

(automatic dry)

Cooling

(automatic dry)

TS+2°C

TB TS - 2°C

Monitoring Monitoring Monitoring

TB TS- 2°C Heating Heating Monitoring

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

The same operation as COOLING OPERATION of item 1 above is performed.

When the room temperature has remained at (set temperature -1°C) for 8 minutes, operation is

automatically switched to DRY and the same operation as DRY OPERATION of item 3 above is performed.

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

When HEATING was selected at , the same operation as HEATING OPERATION of item 2 above is performed.

When the compressor was stopped for 6 consecutive minutes by the temperature control function after the COOLING or HEATING operation mode was selected at above, operation is switched to MONITORING and the operation mode is selected again.

( Fig.4 : Outdoor temperature zone selection )

01-04

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.

01-05

1. FAN SPEED

2. FAN OPERATION

( Table 5 : Indoor fan speed )

ASYA09/12LEC

Operation mode Air flow mode Speed (rpm)

1440 1370 1200

980

Cooling

700 600 480

1440

Me+

Heating

1200

920

Quiet

680

Dry

S-Lo

X zone: 680

J zone: 650

Cool air prevention

3. COOLING OPERATION

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

( Fig.5 : Airflow change - over ( Cooling : AUTO ) )

When the room temperature rises

When the room temperature drops

TR : Room temperature Ts : Setting temperature

TR-Ts > 2 degC

1 degC > TR-Ts

2 degC > TR-Ts > 1 degC

TR-Ts > 2.5 degC

1.5 degC > TR-Ts

2.5 degC > TR-Ts > 1.5 degC =

HIGH mode

MED mode

LOW mode

4. DRY OPERATION

Refer to the Table 5. During the dry mode operation, the fan speed setting can not be changed.

5. HEATING OPERATION

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

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

TR-Ts > - 1.5 degC

- 2.5 degC > TR-Ts

- 1.5 degC > TR-Ts > - 2.5 degC =

TR-Ts > - 1 degC

- 2 degC > TR-Ts

- 1 degC > TR-Ts > - 2 degC =

When the room temperature rises

When the room temperature drops

TR : Room temperature Ts : Setting temperature

Me+

Indoor heat exchanger temperature rises

Indoor heat exchanger temperature drops

The maximum value of the indoor fan speed is set as shown in Figure 7, based on the detected temperature by the indoor heat exchanger sensor on heating mode.

(Fig.7 : Cool air prevention control)

01-06

6. COOL AIR PREVENTION CONTROL (Heating mode)

7. ECONOMY FAN CONTROL (Dry mode)

47°C

40°C

37°C

Cool air prevention

30°C

S-Lo

40°C

28°C

32°C

35°C

Lower of "Hi" and "setting fan speed"

Lower of "Me+" and "setting fan speed"

Lower of "Lo" and "setting fan speed"

Indoor heat exchanger temperature rises

Indoor heat exchanger temperature drops

47°C

40°C

35°C

Lower of "Hi" and "setting fan speed"

Lower of "Me+" and "setting fan speed"

Lower of "Lo" and "setting fan speed"

Switch the airflow [AUTO] at dry mode, and the indoor fan motor will run as shown in Figure8.

(Table 6 : Indoor fan speed )

( Fig.8 : Indoor fan control )

Compressor

OFF

Indoor fan (as shown in Table 6)

S-Lo

OFF

10 30 60 180 60 180 60 10 30

(SEC)

X zone J zone

ASYA09LEC 680rpm 650rpm

ASYA12LEC 680rpm 650rpm

6. OUTDOOR FAN CONTROL

01-07

( Table8 : 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 table9 without relating to the compressor frequency.

( Table9 : Outdoor fan speed after the defrost )

1. Outdoor Fan Motor

2. Fan Speed

AC Motor DC Motor

ASYA09/ 12LEC

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

( Table7 : Type of Motor )

ASYA09LEC 850rpm

Cooling Heating

ASYA09LEC

ASYA12LEC

Zone

850/ 750/ 670/ 500

850/ 750/ 680/ 550/ 450

900/ 750/ 680/ 550/ 450

Refer to Fig.9

(rpm)

400/ 280

G 250/ 200

400/ 280

250/ 200

400/ 280

850/ 750/ 670/ 500

250/ 200

Dry

760/ 470

400/ 280

250/ 200

760/ 470

ASYA12LEC 900rpm

( Fig.9 : Outside air temperature zone selection )

12°C

0°C

Outside air temperature rises

Outside air temperature drops

F zone

D zone

G zone

2°C

10°C

7. LOUVER CONTROL

1. VERTICAL LOUVER CONTROL

2. SWING OPERATION

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

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

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

Cooling / Dry mode

Horizontal flow

Heating mode Downward flow

When the temperature of the air being blown out is low at the start of heating operation or during defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

During use of the Cooling and Dry modes, do not set the Air Flow Direction Louver in the Heating

range (

) for long period of time, since water vapor many condense near the outlet louvers and drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow Direction Louvers are left in the heating range for more than 30minutes, they will automatically return to position

During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically

becomes , and it cannot be adjusted.

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

(Function Range)

(Fig 10: Air Direction Range)

(Operation Range)

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

(Swinging Range)

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

01-08

8. COMPRESSOR CONTROL

1. OPERATION SPEED RANGE

The operation speed of the compressor is different based on the operation mode as shown in the table 10.

Cooling DryHeating

Minimum Maximum Minimum Maximum Minimum Maximum

ASYA09LEC

ASYA12LEC

18rps 64rps 18rps 119rps

18rps 96rps 18rps

23rps

25rps

30rps

33rps119rps

(Table 10 : Compressor operation speed range)

2. OPERATION SPEED CONTROL AT START UP

The compressor speed soon after the start-up is controlled as shown in the figure 11.

(Fig.11 : Compressor control at start-up)

80sec

60sec 60sec 180sec

60sec

56rps

74rps

87rps

108rps

119rps

97rps

01-09

Time

9. TIMER OPEARTION CONTROL

1. OPEARTION FREQUENCY RANGE

The table 11 shows the available timer setting based on the product model.

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

(Table 11 : Timer setting)

01-10

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.

2. PROGRAM TIMER

Stop mode

Operation mode

Set time Set time Set time Set time

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

ASYA09/12LEC

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 )

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.

+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

01-11

01-12

9-2 WIRED REMOTE CONTROLLER (OPTION)

The table12 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

ASYA09/ 12LEC

( Table12 : Timer Setting )

1. ON TIMER / OFF TIMER

Same to 9-1 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.

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 following values. The compressor frequency, the temperatures detected by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.

The pulse range of the electronic expansion valve control is between 60 to 480 pulses.

The expansion valve is set at 480 pulses after 110 seconds of stopping compressor.

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

11. TEST OPERATION CONTROL

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

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

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

[Operation contents memorized when the power is interrupted]

Operation mode Set temperature Set air flow Timer mode and timer time Set air flow Direction Swing

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

13. FOUR-WAY VALVE EXTENSION SELECT

14. AUTO RESTART

01-13

Econmy

[ 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.

15. MANUAL AUTO OPERATION (Indoor unit body operation)

ASYA09LEC

ASYA12LEC

780rpm 35rps

780rpm 39rps

17. COMPRESSOR PREHEATING

18. COIL DRY OPERATION CONTROL

The coil-dry operation functions by pressing COIL DRY button on the remote controller. The coil-dry operation is consisted of Fan operation 50 minutes, Heating operation 3 minutes, and Fan operates for 30 minutes at last before ending the air conditioner operation.

(Table 15 : COIL-DRY Operating Functions)

Indoor Fan Speed

Compressor Frequency

Louver Position

01-14

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 run operation). Forced cooling operation is released after 60 minutes of starting operation. The FORCED COOLING OPERATION will start as shown in Table14.

When the outdoor heat exchanger temperature is lower than 5°C and the all operation has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started and when the outdoor temperature rises to 7°C or greater, preheating is ended.

( Fig. 12 : Outdoor heat exchanger temperature )

5°C

7°C

OFF

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

(Table 13)

Manual auto operation

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

( Table 14)

Forced cooling operation Cooling Hi

Horizontal OFF

Room Temp is not controlled

01-15

19. 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

( Table16 )

20. 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

( Table17 )

21. BASE HEATER OPERATION

The base heater is operated as shown in Figure 13.

( Fig.13 : Base heater control )

2°C

5°C

OFF

When outdoor temperature drops

When outdoor temperature rises

When the compressor stops, Base heater is OFF. When the outdoor fan motor stops, Base heater is OFF. In the cooling mode, Base heater is OFF. In the defrost operation, Base heater maintains the same status as before the compressor stops.

22. DEFROST OPERATION CONTROL

01-16

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 Table18.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table19.

( Table19 : Defrost Release Condition )

Release Condition

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

( Table 18 : Condition of starting Defrost Operation )

1 time defrosting after starting operation

Defrosting after 2 time upon starting operation

Compressor integrating operation time

Less than 20 min. 20 to 60 min. More than 60 min.

Does not operate

- 9°C - 5°C

Less than 35 min. More than 35min.

Does not operate

Integrating defrost (Constant monitoring)

More than 240 min. (For long continuous operation)

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

- 3°C

More than 213 min. (For long continuous operation)

- 5°C

OFF count of the compressor 40 times.

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

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

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

01-17

Compressor OFF Outdoor fan motor OFF 50 sec later four - way valve OFF 55 sec later compressor ON Base heater maintains the same status as before the compressor stops.

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 +16°C

Compressor ON time: Maximum 15 minutes

Defrost end

Compressor integrating operation: Over 20 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 OFF

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 60 min.

Compressor integrating operation: Over 240 min.

Outdoor heat exchanger temperature: Below - 3°C

Compressor integrating operation: Over 213 min.

Outdoor heat exchanger temperature: Below - 5°C

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Fujitsu AS* A09LEC, AS* A12LEC, AO* R09LECN, AO* R12LECN Service Instruction

Specifications and Main Features

Frequently Asked Questions

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