Fujitsu AU* G24LVLA Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
Models Indoor unit Outdoor unit
AO* G24LALA
SERVICE
INSTRUCTION
R410A
AU* G24LVLA
AR* G24LMLA
AB* G24LVTA
Floor Ceiling type
Duct type
Cassette type
INVERTER

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. 4-WAY VALVE EXTENSION SELECT.......................................................................
12. PREVENT TO RESTART FOR 3 MINUTES (3 MINUTES ST)..................................
18. ECONOMY OPERATION...........................................................................................
14. AUTO RESTART........................................................................................................
21. DRAIN PUMP OPERATION.......................................................................................
19. FRESH AIR CONTROL..............................................................................................
22. DEFROST OPERATION CONTROL..........................................................................
01-01
01-02
01-02
01-03
01-05
01-09
01-10
01-13
01-14
01-18
01-18
01-18
01-19
01-20
01-20
01-21
20. EXTERNAL ELECTRICAL HEATER CONTROL........................................................ 01-20
01-22
23. OFF DEFROST OPERATION CONTROL.................................................................. 01-24
24. VARIOUS PROTECTIONS......................................................................................... 01-25
25. FORCED COOLING OPERATION............................................................................. 01-26
26. COMPRESSOR STOP CONTROL............................................................................. 01-26
01-18
15. MANUAL AUTO OPERATION.................................................................................... 01-19
16. COMPRESSOR PREHEATING.................................................................................. 01-19
17. 10°C HEAT OPERATION........................................................................................... 01-20

2-1-2 WIRED REMOTE CONTROLLER DISPLAY......................................................
2-1-1 INDOOR UNIT & WIRED REMOTE CONTROLLER DISPLAY..........................
2-1 ERROR DISPLAY......................................................................................................
2. TROUBLE SHOOTING
2-2 TROUBLE SHOOTING WITH ERROR CODE..........................................................
2-3 TROUBLE SHOOTING WITH NO ERROR CODE....................................................
2-4 SERVICE PARTS INFORMATION............................................................................
02-01
02-01
02-02
2-1-3 OUTDOOR UNIT DISPLAY................................................................................. 02-02
02-25
02-03
02-30
3-1-2 PROCEDURES TO CHANGE THE FUNCTION SETTING................................
3-1-1 INDOOR UNIT....................................................................................................
3-1 FUNCTION SETTING................................................................................................
3. APPENDING DATA
03-01
03-01
03-04
3-2-2 OUTDOOR UNIT................................................................................................
3-2-1 INDOOR UNIT....................................................................................................
3-2 THERMISTOR RESISTANCE VALUES ................................................................... 03-07
03-07
03-07

R410A
FLOOR CEILING /
DUCT / CASSETTE type
INVERTER
1 . DESCRIPTION OF EACH
CONTROL OPERATION

1-1. COOLING OPERATION
1-1-1 COOLING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
The maximum frequency is limited in the range shown in Fig.1 based on the fan speed mode
and the outdoor temperature.
* If the room temperature is 2°C higher than a set temperature,
the compressor operation frequency will attain to maximum frequency.
* If the room temperature is 2.5°C lower than a set temperature, the compressor will be stopped.
* 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.
minimum
frequency
maximum
frequency
18rps 113rps
Outdoor air
temperature A zone
B zone
C zone
D zone
E zone
F zone
Hi Me Lo Quiet
A zone 113rps
113rps
80rps
54rps
66rps
66rps
54rps
45rps
54rps
54rps
45rps
38rps
34rps
34rps
34rps
24rps
B zone
C zone
D-F zone
( Table 1 : Compressor Frequency Range )
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
01-01
Fan speed mode
When the room
temperature rises
When the room
temperature drops
36°C
32°C
21°C
12°C
2°C
34°C
30°C
19°C
10°C
0°C
AO*G24LALA
AO*G24LALA

1-2. HEATING OPERATION
1-2-1 HEATING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit 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 3°C than a set temperature,
the compressor operation frequency will attain to maximum frequency.
* If the room temperature is higher 2.5°C 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 Table2.
( Table 2 : Compressor Frequency Range )
01-02
minimum
frequency
maximum
frequency
18rps 120rpsAO*G24LALA
Operating
frequency
34rpsAO*G24LALA
1-3. DRY OPERATION
1-3-1 INDOOR UNIT CONTROL
The compressor rotation frequency shall change according to set temperature and room
temperature variation which the room temperature sensor of the indoor unit has detected
as shown in the Fig. 2.
Room
temperature Room temperature
Compressor ON
Ts-0.5°C
Ts-1.5°C
Compressor OFF
( Table 3 : Compressor frequency )
( Fig.2 : Compressor Control based on Room Temperature )
Ts : Setting temperature

1-4. AUTO CHANGEOVER OPERATION
01-03
When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum
mode from among the Heating, Cooling, Dry and Monitoring mode. 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, indoor fan and outdoor fan are operated for
around 2 minutes (AB type), or 3 minutes (AU type, AR type).
Room temperature and outdoor temperature are sensed,
and the operation mode is selected in accordance with the table below. <Monitoring mode>
Cooling mode
25°C
Heating mode
( Table 4 : Operation mode selection table )
Room temperature (TR)
TR> Ts + 2°C
Ts + 2°C TR Ts - 2°C *Middle zone
TR < Ts - 2°C Heating
When Cooling or Dry mode was selected at and air flow mode is Auto, the air conditioner operates as follow.
The same operation as COOLING OPERATION AND DRY OPERATION.
When the room temperature has remained at set temperature -1.5°C,
operation is automatically switched to Dry mode.
If the room temperature reaches set temperature +2°C during Dry mode, operation returns to Cooling.
1
1
2
( Fig. 3 : Outdoor temperature zone selection )
Cooling
(Autmatic dry)
Operation mode
*If it's Middle zone, operation mode of indoor unit is selected as below.
(1). Same operation mode is selected as outdoor unit.
If outdoor unit is operating in Cooling, Dry, and Heating mode,
indoor unit will be operated by the same operation mode.
(2). Selected by the outdoor temperature.
If outdoor unit is operating in other than Cooling, Dry, and Heating mode,
indoor unit will be operated according to the outdoor temperature as below.
Cooling
Cooling
Dry
Dry
Compressor stop
When the room
temperature drops
When the room
temperature rises
Ts + 2°C
Ts - 0.5°C
Ts - 1.5°C
Ts + 1°C
Ts - 1.5°C
Ts - 2.5°C
( Fig.4 : Auto changeover : Cooling - Dry )
TR : Room temperature
Ts : Setting temperature
TR : Room temperature
Ts : Setting temperature
( Air flow mode : Auto )
When Heating was selected at , the same operation as HEATING OPERATION of page
01-02 is performed.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the Cooling(Auto:Dry) or Heating mode was selected at above, operation is switched
to Monitoring and the operation mode is selected again.
31
4
1

01-04
START
Room temp.
Ts + 2°C?
COOLING (AUTO:DRY)
OPERATION
HEATING OPERATION
YES
YES
NO
NO
NO
AUTO CHANGEOVER operation flow chart
TS: Setting temperature
Room temp.
Ts - 2°C?
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
NO
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
Middle zone
NO
Operation mode
of outdoor unit : Cooling or Dry?
YES
NO
Operation mode
of outdoor unit : Heating?
YES
NO
YES
Outdoor temperature
25°C?
NO
YES
YES
NO
YESYES

1-5. INDOOR FAN CONTROL
1. Fan speed
( Table 5 : Indoor Fan Speed )
01-05
Operation mode Air flow mode Speed (rpm)
1300
1200
1150
1000
780
500
300
1330
1150
1000
780
500
780
300
Dry
Monitoring
Cooling
Fan
Heating
AB*G24LVTA
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)
Hi
Me+
Me
Lo
Quiet
Cool air prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
Operation mode Air flow mode Speed (rpm)
830
700
600
550
350
830
700
600
550
350
550
350
Dry
Monitoring
Cooling
Fan
Heating
AR*G24LMLA
Hi
Me
Lo
Quiet
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo
Operation mode Air flow mode Speed (rpm)
960
930
880
740
580
400
300
960
850
650
500
400
500
300
Dry
Monitoring
Cooling
Fan
Heating
AU*G24LVLA
Hi
Me+
Me
Lo
Quiet
Cool air prevention
S-Lo
Hi
Me
Lo
Quiet
*Soft Quiet
Auto
S-Lo

2. FAN OPERATION
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.
01-06
3. COOLING OPERATION (Auto : Cooling)
( 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°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
=
High mode
Med mode
Low mode
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 [HIGH] [QUIET], the indoor motor will run at a constant airflow of [COOL]
operation modes QUIET, LOW, MED, HIGH, as shown in Table 5.

6. HEATING OPERATION (Auto : Heating)
01-07
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
=
( Fig.7 : Airflow change - over ( Heating : AUTO ) )
When the room
temperature rises
When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
Low mode
Med mode
High mode
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig. 7.
On the other hand, if switched [HIGH] [QUIET], the indoor motor will run at a constant airflow of [HEAT]
operation modes QUIET, LOW, MED, HIGH, as shown in Table 5.
4. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)
Switch the airflow [Auto] at cooling mode, and the indoor fan motor will run as shown in Fig.6.
Compressor
ON
OFF
Indoor fan
Dry air flow
S-Lo
OFF
( Fig.6 : Indoor Fan Control )
10 30 60 180 60 180 60 10 30 (SEC)
Switch the airflow at cooling mode, and the indoor fan motor will run as shown in Fig.6.
It depends on the Function setting "Indoor unit fan control for energy saving."
5. INDOOR UNIT FAN CONTROL FOR ENERGY SAVING (Cooling mode)
Indoor fan
Setting air flow

7. COOL AIR PREVENTION CONTROL (Heating mode)
6. DRY OPERATION
Refer to the Figure 4.
During the dry mode operation, the fan speed setting can not be changed.
01-08
The maximum value of the indoor fan speed is set as shown in Fig. 8, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.
( Fig.8 : Cool Air Prevention Control )
*Hi
or setting fan mode
*Lo
or setting fan mode
37°C
29°C
32°C
24°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
During Normal Heating operation During 10°C HEAT operation
7-2. For AR*G24LMLA
39°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Lo 34°C
Auto
42°C
30°C
34°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
Cool air
prevention
39°C
37°C
37°C
32°C
24°C
S-Lo
S-Lo
37°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Lo 32°C
Auto
39°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Lo 34°C
Auto
During Normal Heating operation During 10°C HEAT operation
7-1. For AB*G24LVTA
42°C
30°C
34°C
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
Cool air
prevention
39°C
37°C
37°C
32°C
24°C
S-Lo
During Normal Heating operation During 10°C HEAT operation
7-3. For AU*G24LVLA
*Lower speed is selected.
*Lower speed is selected.
*Lower speed is selected.

1-6. OUTDOOR FAN CONTROL
1. Outdoor Fan Motor
Following table shows the fan speed of the outdoor unit.
01-09
( Table 6 : Fan speed of the outdoor unit )
( Table 7 : Fan speed when starting up outdoor fan )
Outdoor temperature
The outdoor fan speed is changed in the range of the speed shown in the above table,
based on the frequency of the compressor.
(When the compressor frequency increases, the outdoor fan speed is also changed to
higher speed. If the compressor frequency decreases, the outdoor fan speed is changed
to the lower speed as well.)
After starting up the outdoor fan, it operates with the following speed for initial 20 seconds.
After operating the defrost control function on heating mode except economy operation,
its speed becomes 1050rpm regardless of the compressor frequency.
However, it returns to the normal speed control when the defrosting operation does not function
for 240 minutes after releasing the defrost operation or when the outdoor temperature sensor
detection value becomes higher than 5°C.
Over than 12°C
Less than 12°C
Cooling Dry
950/ 820/ 670/ 500 rpm
400/ 340/ 280/ 250/ 230 rpm 400/ 340/ 280/ 250/ 230 rpm
500 rpm
AO*G24LALA
Outdoor temperature
Less than 12°C in
Cooling / Dry
Fan speed
500 rpm
200 rpm
Heating
1050/ 1000/ 730/ 670/ 550/ 450 rpm
AO*G24LALA
AO*G24LALA
Other than those above

1-7. LOUVER CONTROL
01-10
1-1. VERTICAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follows:
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 / Fan mode Horizontal flow
Heating mode Downward flow
(Function Range)
(Fig.9 : Air Direction Range)
(Operation Range)
1-2. SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to swing.
The range of swing depends on the set airflow direction.
When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.
( Stop mode means Operation stop.)
During Cooling / Dry / Fan / Heating mode:
During AUTO mode operation, for the first minute after beginning operation, air-flow will be horizontal
; the air direction cannot be adjusted during this period.
The type of operation
Cooling/Dry
Range of swing
to
Heating to
567
7
567
Fan( ) to
to
7
3
7
3
to
Fan( )
to
7
5
1. For Ceiling Type < AB*G24LVTA >

01-11
1-3. HORIZONTAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follows:
(Function Range)
(Fig.10 : Air Direction Range)
1-4. SWING OPERATION
When the swing signal is received from the remote controller, the horizontal louver starts to swing.
The range of swing depends on the set airflow direction.
When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.
( Stop mode means Operation stop.)
The type of operation
Cooling/Dry
Range of swing
to
Heating to
5
Fan to
5
RIGHT/LEFT air direction louvers
Use the air direction adjustments within the ranges shown above.
The remote control unit's display does not change.
5
5
(All range)
(All range)
(All range)

01-12
2-1. VERTICAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follows:
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 / Fan mode Horizontal flow
Heating mode Downward flow
(Function Range)
(Fig.11 : Air Direction Range)
(Operation Range)
2-2. SWING OPERATION
When the swing signal is received from the remote controller, the vertical louver starts to swing.
The range of swing depends on the set airflow direction.
When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted
and the louver stops at the memorized position.
1
2
3
4
( Stop mode means Operation stop.)
During Cooling / Dry / Fan / Heating mode :
During AUTO mode operation, for the first minute after beginning operation, air-flow will be horizontal
; the air direction cannot be adjusted during this period.
The type of operation
Cooling/Dry/Fan
Range of swing
to
to
Heating
2. For Cassette Type < AU*G24LVLA >

1-8. COMPRESSOR CONTROL
1. OPERATION FREQUENCY RANGE
The operation frequency of the compressor is different based on the operation mode as
shown in Table 8.
Cooling Heating
Min Max Min Max Dry
(Table 8 : Compressor Operation Frequency Range)
2. OPERATION FREQUENCY CONTROL AT START UP
The compressor frequency soon after the start-up is controlled as shown in Fig. 12.
(Fig.12 : Compressor Control at Start-up)
40rps
90sec 180sec 270sec
59rps
01-13
AO*G24LALA 18rps 113rps 18rps 120rps 34rps
85rps

01-14
AR-WAE1E
1. ON / OFF TIMER
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
The weekly timer allows up to two ON and OFF time to set up per day.
Use this timer function to set operating time for each day of the week.
Operation mode
The operating time can be set in 30 min increments only.
The OFF time can be carried over to next day.
The ON timer and the OFF timer functions cannot be set with using the weekly timer.
Both ON and OFF time must be set.
2. WEEKLY TIMER
2-1. WEEKLY TIMER
Stop mode Stop mode Stop mode
Operation mode Operation mode
Set time Set time Set time Set time
1-9-1 WIRED REMOTE CONTROLLER
ON / TIMER
OFF / TIMER
WEEKLY TIMER
TEMPERATURE SET BACK TIMER
1-9. TIMER OPERATION CONTROL

01-15
The DAY OFF setting is only available for days for which weekly settings already exist.
The SET BACK timer only changes the set temperature for 7 days, it cannot be used to start or stop
air conditioner operation.
The SET BACK timer can be set to operate up to two times per day but only one temperature setting
can be used.
During the COOL/DRY mode, the air conditioner will operate at a minimum of 18°C even if
the SET BACK temperature is set to 17°C or lower.
The DAY OFF setting can only be set one time. The DAY OFF setting is cancelled automatically
after the set day has passed.
Normal
Next day setting
If the operating time carries over to the next day (during a next day setting), the effective
DAY OFF range will be set as shown below.
2-2. DAY OFF setting
3. TEMPERATURE SET BACK TIMER
Stop mode Stop mode
Operation mode
Stop mode
Operation mode
Preceding day Next day
DAY OFF
Stop mode Stop mode
Operation mode
Stop mode
Operation mode
DAY OFF
Setting day
Preceding day Next daySetting day
Case of SET BACK timer on the Cooling operation.
( Setting temperature :22°C, SET BACK temperature :26°C)
SET BACK setting
Operation
temperature
Operation
temperature
26°C
22°C
26°C
22°C
24°C
*1
ON OFF OFFON
*1: During the SET BACK function,
the setting temperature is changed. Change the setting temperature:
22°C 24°C