Fujitsu AS* A09LEC Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTEDtype
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
01-13
01-13
01-13
01-14
01-14
01-14
01-14
01-15
01-15
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
02-01
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
03-01
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
52rps 45rps 40rps 29rps
57rps 42rps 36rps 27rps
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 68rps
119rps 119rps 80rps 54rps
119rps 119rps
Me
85rps
85rps
85rps
85rps
96rps
96rps
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.
1
<
1
2
31
4
1
( 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
Hi
Hi
700
600
480
1440
Me+
Me
Me
Heating
Lo
Lo
1200
920
Quiet
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
=
1degC > TR-Ts
2degC > 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
=
-2degC > TR-Ts
-1degC > TR-Ts > - 2 degC
=
When the room
temperature rises When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
Lo
Me
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
<Before 7 minutes upon running the compressor>
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
40°C
35°C
<After 7 minutes upon running the compressor>
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
ON
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
D
F
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
D
F400/ 280
850/ 750/ 670/ 500
250/ 200
G
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 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 Stop mode Stop mode
Operation 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 )
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
01-11

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.
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 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 )
ON
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 )
ON
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
ST
Defrosting after 2 time
upon starting operation
ND
Compressor integrating operation time
Compressor integrating operation time
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
or
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
=