Fujitsu AS*G09LTCB Operating instructions

SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTEDtype
Models Indoor unit Outdoor unit
INVERTER
SERVICE
INSTRUCTION
R410A
AS*G09LTCB
AS*G12LTCB
AS*G14LTCB
AO*G09LTCN
AO*G12LTCN
AO*G14LTCN

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 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
18. 10°C HEAT OPERATION............................................................................................ 01-14
01-14
01-15
22. POWERFUL OPERATION.......................................................................................... 01-15
23. BASE HEATER OPERATION..................................................................................... 01-15
25. OFF DEFROST OPERATION CONTROL...................................................................
24. DEFROST OPERATION CONTROL........................................................................... 01-16
01-18
26. VARIOUS PROTECTIONS.......................................................................................... 01-19
01-12

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
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
02-25
2-4 SERVICE PARTS INFORMATION.............................................................................. 02-30

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
AS*G09LTCB
AS*G12LTCB
AS*G14LTCB
18rps
15rps
76rps
12rps 63rps
57rps
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 96rps 61rps 51rps 33rps
B zone 96rps 61rps 51rps 33rps
C zone 96rps 61rps 51rps 33rps
AS*G09LTCB
D zone 57rps 42rps 36rps 27rps
E zone 57rps 42rps 36rps 27rps
F zone 57rps 42rps 36rps 27rps
( 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.
AS*G12LTCB
AS*G14LTCB
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
A zone 91rps 44rps 34rps 24rps
B zone 91rps 44rps 34rps 24rps
C zone 72rps 34rps 24rps
D zone 52rps 30rps 21rps 18rps
E zone 63rps 34rps 27rps 19rps
F zone 63rps 34rps 27rps 19rps
44rps
Outdoor
temperature drops
Outdoor
temperature rises
( Table 2 : Limit of maximum speed based on outdoor temperature )
96rps
76rps
91rps
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.
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
AS*G09LTCB 18rps 130rps
AS*G12LTCB 16rps 119rps
AS*G14LTCB 16rps 140rps
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 4.
However, after the compressor is driven, the indoor unit shall run at operation frequency of
61rps (09LTCB), 51rps (12LTCB), 52rps (14LTCB) for 60 seconds.
Ts+0.5°C
Ts -1.5°C
Ts -0.5°C
Ts+1.5°C
( Table 4 : Compressor frequency in Dry mode)
( Fig.2 : Compressor control based on room temperature )
Operating
frequency
33rps
25rps
0rps
09LTCB X zone
J zone
Y zone
Operating
frequency
J zone
Y zone
X zone 26rps
18rps
0rps
12LTCB
Operating
frequency
J zone
Y zone
X zone 24rps
16rps
0rps
14LTCB
X zone
J zone
Y zone
Room
temperature drops
Room
temperature rises

4. AUTO CHANGEOVER OPERATION
01-03
(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.
01-04
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 Figure4.
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 5.
( 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 5 : 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: 740
J zone: 710
AS*G09LTCB AS*G12LTCB AS*G14LTCB
4. DRY OPERATION
Refer to the Table 5.
During the dry mode operation, the fan speed setting can not be changed.
Hi
Hi
Me+
Me
Me
Lo
Lo
Quiet
Quiet
S-Lo
Cool air prevention
Powerful
Powerful
1410
1300
1220
1120
960
650
610
570
1470
1370
1260
1180
960
650
610
570
1620
1510
1440
1220
1030
790
610
570
1410
1300
1080
960
650
1470
1370
1120
960
650
1550
1440
1220
980
740

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
=
-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 rises Indoor heat exchanger
temperature drops
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.
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 6)
S-Lo
OFF
10 30 60 180 60 180 60 10 30
(sec)
( Table 6 : Indoor fan speed )
X zone J zone
AS*G09/12LTCB 650rpm 610rpm
Y zone
0 570rpm 650rpm
AS*G14LTCB 740rpm 710rpm 0 570rpm 740rpm
Dry Cooling
42°C
30°C
34°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Powerful
Hi
Lo
Cool air
prevention
39°C
37°C
37°C
32°C
28°C
S-Lo
<Normal operation> <Powerful operation>