Fujitsu AS G09LTCA Series Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTEDtype
Models Indoor unit Outdoor unit
INVERTER
SERVICE
INSTRUCTION
R410A
AS*G07LUCA
AS*G09LUCA
AS*G12LUCA
AS*G14LUCA
AS*G09LTCA
AS*G12LTCA
AO*G07LUC
AO*G07LUCA
AO*G09LUC
AO*G09LUCB
AO*G12LUC
AO*G14LUC
AO*G09LTC
AO*G12LTC

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..............................................................................
17. COMPRESSOR PREHEATING..................................................................................
19. ECONOMY OPERATION............................................................................................
21. OUTDOOR UNIT LOW NOISE OPERATION..............................................................
20. HUMAN SENSOR........................................................................................................
01-01
01-02
01-03
01-04
01-05
01-07
01-08
01-09
01-10
01-13
01-13
01-13
01-14
01-14
01-14
01-15
01-15
18. 10°C HEAT OPERATION............................................................................................ 01-15
01-15
01-16
22. POWERFUL OPERATION.......................................................................................... 01-16
24. OFF DEFROST OPERATION CONTROL...................................................................
23. DEFROST OPERATION CONTROL........................................................................... 01-17
01-19
25. VARIOUS PROTECTIONS.......................................................................................... 01-20
01-13
2. TROUBLE SHOOTING
2-1 ERROR DISPLAY.......................................................................................................
2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY.....................
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

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................................................................................................
03-05
03-05
03-05
4. REPLACEMENT PARTS
4-1 AS*G07/09/12/14LUCA, 09/12LTCA...........................................................................
4-1-1 PARTS LAYOUT DRAWING..............................................................................
4-1-2 DISASSEMBLY PROCESS................................................................................
04-01
04-01
04-02

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
22rps 76rps
76rps
18rps 88rps
80rps
36°C
A zone
34°C 32°C
B zone
30°C 21°C
C zone
19°C
D zone
Indoor fan mode
Me Lo Quiet
A zone 79rps 61rps 52rps 37rps
B zone 79rps 61rps 52rps 37rps
C zone 79rps 61rps 52rps 37rps
D zone 52rps 43rps 37rps 28rps
E zone 64rps 55rps 49rps 36rps
F zone 64rps 55rps 49rps 36rps
( Table 1 : Compressor frequency range )
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 indoor
fan mode and the outdoor temperature.
* If the room temperature is some degrees lower than a set temperature,
the compressor will be stopped.
AO*G12LUC
AO*G14LUC
A zone 96rps 61rps 51rps 33rps
B zone 96rps 61rps 51rps 33rps
C zone 96rps 61rps 51rps 33rps
D zone 57rps 42rps 36rps 27rps
E zone 73rps 54rps 45rps 30rps
F zone 73rps 54rps 45rps 30rps
A zone 105rps 64rps 54rps 42rps
B zone 105rps 64rps 54rps 42rps
C zone 105rps 54rps 42rps
D zone 61rps 51rps 45rps 30rps
E zone 84rps 54rps 45rps 30rps
F zone 84rps 54rps 45rps 30rps
AO*G09LTC
AO*G12LTC
A zone 96rps 61rps 51rps 33rps
B zone 96rps 61rps 51rps 33rps
C zone 96rps 61rps 51rps 33rps
D zone 57rps 42rps 36rps 27rps
E zone 57rps 42rps 36rps 27rps
F zone 57rps 42rps 36rps 27rps
A zone 76rps 45rps 37rps 29rps
B zone 76rps 45rps 37rps 29rps
C zone 76rps 45rps 37rps 26rps
D zone 43rps 35rps 26rps 20rps
E zone 51rps 37rps 31rps 22rps
F zone 51rps 37rps 31rps 22rps
64rps
Outdoor
temperature
Outdoor
temperature
( Table 2 : Limit of maximum speed based on outdoor temperature )
10rps
AO*G07LUC/LUCA
AO*G09LUC/LUCB
AO*G07LUC/LUCA
AO*G09LUC/LUCB
AO*G12LUC
AO*G14LUC
AO*G09LTC
AO*G12LTC 57rps
79rps
96rps
105rps
96rps
76rps
Outdoor
temp. zone Hi
* If the room temperature is 2°C 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 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 Table 3.
( Table 3 : Compressor frequency range )
01-02
Minimum
frequency
Maximum
frequency
23rps 99rps
AO*G12LUC
AO*G14LUC
AO*G09LTC
18rps 130rps
AO*G12LTC
AO*G07LUC/LUCA
AO*G09LUC/LUCB
16rps 119rps

01-03
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
70rps (07/09LUCA), 56rps (09LTCA/12LUCA), 56rps (14LUCA), 40rps (12LTCA) for 80 seconds.
Ts+0.5°C
Ts -1.5°C
Ts -0.5°C
Ts+1.5°C
( Table 5 : Compressor frequency in Dry mode)
( Fig.2 : Compressor control based on room temperature )
Operating
frequency
37rps
28rps
0rps
07/09
LUCA
X zone
J zone
Y zone
Operating
frequency
J zone
Y zone
X zone 33rps
25rps
0rps
12LUCA
Operating
frequency
J zone
Y zone
X zone 42rps
25rps
0rps
14LUCA
X zone
J zone
Y zone
Operating
frequency
33rps
25rps
0rps
09LTCA X zone
J zone
Y zone
Operating
frequency
J zone
Y zone
X zone 26rps
18rps
0rps
12LTCA
Room
temperature
Room
temperature

4. AUTO CHANGEOVER OPERATION
01-04
(Fig. 3 : Operation flow chart in Auto changeover)
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, Lo, Me, Hi, while the indoor fan only runs.
When fan mode is set at [Auto], it operates on [Me] fan Speed.
01-05
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
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
=
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: 650
J zone: 610 X zone: 650 J zone: 610 X zone: 650 J zone: 610
AS*G07LUCA AS*G09LUCA
AS*G09LTCA AS*G12LUCA AS*G12LTCA
4. DRY OPERATION
Refer to the Table 6.
During the dry mode operation, the fan speed setting can not be changed.
AS*G14LUCA
X zone: 740
J zone: 710
Hi
Hi
Me+
Me
Me
Lo
Lo
Quiet
Quiet
S-Lo
Cool air prevention
Powerful
Powerful
1290
1180
1120
1050
930
650
610
570
1140
1050
930
650
1220
1410
1300
1220
1120
960
650
610
570
1300
1080
960
650
1410
1470
1370
1260
1180
960
650
610
570
1370
1120
960
650
1470
1620
1510
1440
1220
1030
790
610
570
1370
1220
980
740
1550

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 )
01-06
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
=
-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
Lo mode
Me mode
Me+ 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.7.
Switch the airflow at cooling mode, and the indoor fan motor will run as shown in Fig.7.
It depends on the Function setting "Indoor unit fan control for energy saving."
7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)
8. INDOOR UNIT FAN (ONTROL FOR ENERGY SAVING (Cooling 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
AS*G07/09/12LUCA 650rpm 610rpm
Y zone
0 570rpm 650rpm
AS*G14LUCA 740rpm 710rpm 0 570rpm 740rpm
Dry Cooling
AS*G09/12LTCA
42°C
30°C
34°C
Indoor heat exchanger
temperature Indoor heat exchanger
temperature
Powerful
Hi
Lo
Cool air
prevention
39°C
37°C37°C
32°C
28°C
S-Lo
<Normal operation> <Powerful operation>