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