Fujitsu ASU09RL2 Operating instructions

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTEDtype
Models Indoor unit Outdoor unit
INVERTER
SERVICE
INSTRUCTION
R410A
ASU09RL2
ASU12RL2
AOU09RL2
AOU12RL2

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. FOUR-WAY VALVE EXTENSION SELECT................................................................
10. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST ).................................
13. MANUAL AUTO OPERATION ( Indoor unit body operation ).....................................
12. AUTO RESTART.........................................................................................................
14. FORCED COOLING OPERATION..............................................................................
15. COMPRESSOR PREHEATING..................................................................................
16. ECONOMY OPERATION............................................................................................
01-01
01-02
01-02
01-03
01-04
01-06
01-07
01-08
01-09
01-11
01-11
01-11
01-12
01-12
01-12
17. POWERFUL OPERATION.......................................................................................... 01-12
19. OFF DEFROST OPERATION CONTROL...................................................................
18. DEFROST OPERATION CONTROL........................................................................... 01-13
01-15
20. VARIOUS PROTECTIONS.......................................................................................... 01-16
01-11
2. TROUBLE SHOOTING
2-1 ERROR DISPLAY.......................................................................................................
2-2 TROUBLE SHOOTING WITH ERROR CODE............................................................
2-3 TROUBLE SHOOTING WITH NO ERROR CODE.....................................................
02-01
02-02
02-21
2-4 SERVICE PARTS INFORMATION.............................................................................. 02-26

3. APPENDING DATA
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.....................................................................................
3-2-1 INDOOR UNIT....................................................................................................
3-2-2 OUTDOOR UNIT................................................................................................
03-06
03-06
03-06

1 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
WALL MOUNTED type
INVERTER

( Fig.1 : Outdoor temperature zone )
1. COOLING OPERATION
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
Minimum
frequency
Maximum
frequency
Maximum
frequency
AOU09RL2
AOU12RL2 18rps 57rps
80rps
36°C
(97°F)
A zone
34°C
(93°F) 32°C
(90°F)
B zone
30°C
(86°F) 21°C
(70°F)
C zone
19°C
(66°F)
D zone
Indoor fan mode
Me Lo Quiet
A zone 80rps 49rps 42rps 32rps
B zone 80rps 49rps 42rps 32rps
C zone 80rps 49rps 42rps 32rps
ASU09RL2
D zone 49rps 44rps 40rps 29rps
E zone 49rps 44rps 40rps 29rps
F zone 49rps 44rps 40rps 29rps
( Table 1 : Compressor frequency range )
01-01
E zone
F zone
10°C
(50°F)
0°C
(32°F)
12°C
(54°F)
2°C
(36°F)
* When the room temperature is between +2°C(4°F) to -2.5°C(-5°F) of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Fig.1 based on the indoor
fan mode and the outdoor temperature.
* If the room temperature is some degrees lower than a set temperature,
the compressor will be stopped.
ASU12RL2 A zone 96rps 61rps 51rps 33rps
B zone 96rps 61rps 51rps 33rps
C zone 96rps 61rps 51rps 33rps
D zone 73rps 57rps 45rps 33rps
E zone 73rps 57rps 45rps 33rps
F zone 73rps 57rps 45rps 33rps
When the outdoor
temperature drops
When the outdoor
temperature rises
( Table 2 : Limit of maximum speed based on outdoor temperature )
80rps
96rps
Outdoor
temp. zone Hi
* If the room temperature is 2°C(4°F) higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency to Maximum Frequency.

2. HEATING OPERATION
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is lower by 3°C (6°F) than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is some degrees higher than a set temperature,
the compressor will be stopped.
* When the room temperature is between +2.5°C (+5°F) to -3°C (-6°F) of the setting temperature,
the compressor frequency is controlled within the range shown in Table 3.
However, the maximum frequency is limited shown in Table 4 based on the fan mode.
( Table 3 : Compressor frequency range )
01-02
Minimum
frequency
Maximum
frequency
AOU09RL2
AOU12RL2 18rps 120rps
80rps
3. DRY OPERATION
The compressor frequency shall change according to the temperature, set temperature,
and room temperature variation which the room temperature sensor of the indoor unit body has
detected as shown in the Table 5.
However, after the compressor is driven, the indoor unit shall run at operation frequency of
(09 : 52 rps, 12 : 61 rps) for 60 seconds.
Ts+0.5°C (Ts+1°F)
Ts -1.5°C (Ts-3°F)
Ts -0.5°C (Ts-1°F)
Ts+1.5°C (Ts+3°F)
( Table 5 : Compressor frequency in Dry mode)
( Fig.2 : Compressor control based on room temperature )
Operating
frequency
30rps
28rps
0rps
AO09RL2 X zone
J zone
Y zone
Operating
frequency
J zone
Y zone
X zone 33rps
25rps
0rps
AO12RL2
X zone
J zone
Y zone
When the room
temperature drops
When the room
temperature rises
Indoor fan mode
Me Lo Quiet Auto
120rps
80rps
( Table 4 : Limit of maximum speed based on outdoor temperature )
Hi
AOU09RL2
AOU12RL2

4. AUTO CHANGEOVER OPERATION
01-03
(Fig. 3 : Operation flow chart in Auto changeover)
START
Room temp.
Room temp.
>Ts+2°C (4°F) ?
COOLING OPERATION
HEATING OPERATION
YES
YES
NO
NO
NO
NO
YES
YES
TS: Setting temperature
<Ts- 2°C(4°F) ?
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 (64°F) and 30°C (88°F) in 1°C (2°F) steps.

5. INDOOR FAN CONTROL
The airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi, while the indoor fan only runs.
When fan mode is set at [Auto], it operates on [Me] fan Speed.
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 Fig4.
On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Cool]
operation modes Quiet, Lo, Me, Hi, as shown in Table 6.
( Fig.4 : Airflow change - over ( Cooling : Auto ) )
When the room
temperature rises
When the room
temperature drops TR : Room temperature
Ts : Setting temperature
TR-Ts > 2°C (4°F)
1°C (2°F) > TR-Ts
2°C (4°F) > TR-Ts > 1°C (2°F)
=
TR-Ts > 2.5°C (5°F)
=
1.5°C (3°F) > TR-Ts
2.5°C (5°F) > TR-Ts > 1.5°C (3°F)
=
Hi mode
Me mode
Lo mode
1. Fan speed
( Table 6 : Indoor fan speed )
Operation mode Air flow mode
Speed (rpm)
Cooling/ Fan
Heating
Dry X zone: 700
J zone: 600
X zone: 700
J zone: 600
ASU09RL2 ASU12RL2
4. DRY OPERATION
Refer to the Table 6.
During the dry mode operation, the fan speed setting can not be changed.
Hi 1360
Hi 1320
Me+ 1290
Me 1120
Me 1120
Lo 900
Lo 840 860
Quiet 700
* Soft Quiet 600
Quiet 700
S-Lo 480
Cool air prevention 600
Powerful 1420
Powerful 1400
1360
1320
1290
1120
1120
900
700
600
700
480
600
1420
1400
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)

The maximum value of the indoor fan speed is set as shown in Fig.6 based on the detected
temperature by the indoor heat-exchanger sensor on heating mode.
( Fig.6 : Cool air prevension control )
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. 5
On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow
of [Heat] operation modes Quiet, Lo, Me, High, as shown in Table 6.
6. COOL AIR PREVENTION CONTROL (Heating mode)
( Fig.5 : Airflow change - over ( Heating : Auto ) )
TR-Ts > -1.5°C (-3°F)
=
-2.5°C (-5°F) > TR-Ts
-1.5°C (3°F) > TR-Ts > -2.5°C (-5°F)
=
TR-Ts > -1°C (-2°F)
=
-2°C (-4°F) > TR-Ts
-1°C (-2°F) > TR-Ts > -2°C (-4°F)
=
When the room
temperature rises When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
Lo mode
Me mode
Me+ mode
42°C (108°F)
30°C (86°F)
34°C (93°F)
When the Indoor heat
exchanger temp. rises
When the Indoor heat
exchanger temp. drops
When the Indoor heat
exchanger temp. rises
When the Indoor heat
exchanger temp. drops
* Hi or setting
Fan mode
* Me+ or setting
Fan mode
* Lo or setting
Fan mode
Cool air
prevention
39°C (102°F)
37°C (99°F)
37°C (99°F)
32°C (90°F)
28°C (82°F)
S-Lo
Switch the airflow [Auto] at cooling mode, and the indoor fan motor will run as shown in Fig.7.
7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)
( Fig.7 : Indoor fan control )
Compressor
ON
OFF
Indoor fan
Setting air flow
Indoor fan
(as shown in Table 7)
S-Lo
OFF
10 30 60 180 60 180 60 10 30
(sec)
( Table 7 : Indoor fan speed )
X zone J zone
ASU09/12RL2 700rpm 600rpm
Y zone
0 480rpm 700rpm
Dry Cooling
42°C
(108°F)
30°C
(86°F)
34°C
(93°F)
Powerful
Hi
Lo
Cool air
prevention
39°C
(102°F)
37°C
(99°F)
37°C
(99°F)
32°C
(90°F)
28°C
(82°F)
S-Lo
<Normal operation> <Powerful operation>
* Lower speed is selected.
* Lower speed is selected.