Fujitsu AB A30LBT Series Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
Ceiling type
Duct type
Cassette type
Models Indoor unit Outdoor unit
AB* A30LBT
AB* A36LBT
AO* A30LFTL
AO* A36LFTL
INVERTER
SERVICE
INSTRUCTION
R410A
AR* A30LBTU
AR* A36LBTU
AU* A30LBLU
AU* A36LBLU
AOTA30LGTL

CONTENTS
1. DESCRIPTION OF EACH CONTROL OPERATION
COOLING OPERATION...........................................................................................
AUTO CHANGEOVER OPERATION.......................................................................
INDOOR FAN CONTROL.........................................................................................
OUTDOOR FAN CONTROL.....................................................................................
01-01
HEATING OPERATION............................................................................................ 01-02
DRY OPERATION..................................................................................................... 01-03
01-04
01-05
01-07
COMPRESSOR CONTROL......................................................................................
01-08
TIMER OPERATION CONTROL.............................................................................. 01-12
ELECTRONIC EXPANSION VALVE CONTROL..................................................... 01-16
TEST OPERATION CONTROL................................................................................ 01-16
PREVENT TO START FOR 3 MINUTES (3 MINUTES ST)...................................... 01-16
4-WAY VALVE EXTENSION SELECT.....................................................................
01-17AUTO RESTART......................................................................................................
01-17
MANUAL AUTO OPERATION (When using the Wireless RC)............................. 01-17
COMPRESSOR PREHEATING................................................................................
01-18EXTERNAL ELECTRICAL HEATER CONTROL.....................................................
01-18FRESH AIR CONTROL............................................................................................
01-18
ECONOMY OPERATION..........................................................................................
01-21
VARIOUS PROTECTIONS.......................................................................................
01-22
FORCED COOLING OPERATION...........................................................................
01-23
COMPRESSOR STOP CONTROL........................................................................... 01-25
DEFROST OPERATION CONTROL........................................................................
01-18
OFF DEFROST OPERATION CONTROL................................................................
01-19
LOUVER CONTROL.................................................................................................
01-11
1-1
1-2
1-3
1-4
1-5
1-6
1-8
1-7
1-13
1-9
1-10
1-11
1-12
1-14
1-15
1-16
1-17
1-18
1-19
1-20
1-21
1-22
1-23
1-24
OUTDOOR UNIT DISPLAY.................................................................................
WIRED REMOTE CONTROLLER DISPLAY.......................................................
ERROR DISPLAY.....................................................................................................
2. TROUBLE SHOOTING
TROUBLE SHOOTING WITH ERROR CODE..........................................................
TROUBLE SHOOTING WITH NO ERROR CODE...................................................
SERVICE PARTS INFORMATION...........................................................................
02-01
02-01
02-04
02-28
02-05
02-33
2-1
2-2
2-3
2-4
2-1-1
2-1-3
INDOOR UNIT DISPLAY..................................................................................... 02-032-1-2
PUMP DOWN............................................................................................................
01-16
1-25

3. APPENDING DATA
03-01
03-01
03-04
03-07
FUNCTION SETTING................................................................................................
03-08
EXTERNAL INPUT & OUTPUT................................................................................
INDOOR UNIT......................................................................................................
03-09
Procedures to change the Function Setting.........................................................
Wired Remote Controller......................................................................................
3-1
3-1-1
3-1-2
3-1-4
3-1-5
Switching Remote Control Unit Signal Codes......................................................
3-2
03-05Procedures to change the Function Setting for wireless RC................................3-1-3
THERMISTOR RESISTANCE VALUES................................................................... 03-133-3

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

1-1. COOLING OPERATION
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 speed of the compressor.
* If the room temperature is 2 °C higher than a set temperature,
the compressor operation speed will attain to maximum speed.
* If the room temperature is some degree lower than setting temperature,
the compressor is likely to stop.
* When the room temperature is between +2 °C to -2.5 °C of the setting temperature,
the compressor speed is controlled within the range shown in Table 1.
However, the maximum speed is limited in the range shown in Figure 1 based
on the fan speed mode and the outdoor temperature.
minimum
speed
maximum
speed
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
16rps 72rps
Outdoor air
temperature
( Table 1 : Compressor Speed Range )
( Fig.1 : Limit of Maximum Speed based on Outdoor Temperature )
01-01
A zone
B zone
C zone
D zone
E zone
F zone
Me Lo QuHi
A zone 36°C
34°C B zone 32°C
30°C C zone 21°C
19°C D zone 12°C
10°C E zone 2°C
0°C F zone
When the room
temperature drops
When the room
temperature rises
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
Fan speed mode
72rps 50rps 42rps 29rps
72rps 50rps 42rps 29rps
56rps 42rps 37rps 29rps
42rps 37rps 32rps 20rps
42rps 37rps 32rps 20rps
42rps 37rps 32rps 20rps

01-02
1-2. HEATING OPERATION
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 speed of the compressor.
* If the room temperature is lower 3 °C than a set temperature,
the compressor operation speed will attain to maximum speed.
* 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 speed is controlled within the range shown in Table 2.
However, the maximum speed is limited in the range shown in Figure 2 based on the
fan speed mode and the outdoor temperature.
( Table 2 : Compressor Speed Range )
( Fig.2 : Limit of Maximum Speed based on Outdoor Temperature )
19°C
C zone
17°C
14°C
B zone
12°C
A zone
Outdoor air
temperature
When the room
temperature drops
When the room
temperature rises
minimum
speed
maximum
speed
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
16rps 90rps
A zone
B zone
C zone
Me Lo QuHi
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
Fan speed mode
90rps 65rps 56rps 49rps

1-3. DRY OPERATION
The compressor rotation speed shall change according to the temperature,
set temperature, and room temperature variation which the room temperature sensor
of the indoor unit has detected as shown in the fig 3.
( Table 3 : Compressor rotation speed )
01-03
Operating speed
29rps
Room
temperature
Room
temperature
Ts+1.5 °C
Ts+0.5 °C
( Fig.3 : Compressor Control based on Room Temperature )
Ts : Setting temperature
Compressor
ON
OFF
Indoor fan
Dry air flow
S-Lo
OFF
( Fig.4 : Indoor Fan Control )
10 30 60 180 60 180 60 10 30 (sec)
Temperature zone
0rps
X zone
Y zone
[ AB*A30/36LBT : Dry air flow 650rpm, S-Lo 250rpm ]
[ AR*A30/36LBTU : Dry air flow 550rpm, S-Lo 350rpm ]
[ AU*A30/36LBLU : Dry air flow 430rpm, S-Lo 270rpm ]
X zone
Compressor ON
Y zone
Compressor OFF

01-04
1-4. AUTO CHANGEOVER OPERATION
When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING and MONITORING modes. During operation, the
optimum mode is automatically swiched in accordance with temperature changes. The temperature
can be set between 18°C and 30°C in 1 °C steps.
When operation starts, only the indoor fan is operated for 1 minute. (Air flow mode: S- Lo)
After 1 minute, depends on the room temperature and outdoor unit's operarion mode,
the operation mode is selected in accordance with the below.
( Table 4 : Operation mode selection table )
1
Room temperature :Tb A zone
Tb > Ts +2 °C
Ts -2 °C > Tb
Monitoring
Monitoring
Heating
Ts : Setting temperature
B zone
Cooling
(Automatic Dry)
Monitoring
Heating
C zone
Monitoring
Monitoring
Ts +2 °C > Tb > Ts -2 °C
==
( Fig.5 : Operation mode selection based on Outdoor Temperature )
Cooling
(Automatic Dry)
A zone
B zone
C zone
32°C
-10°C
Outdoor temperature zone
The same operation as COOLING OPERATION of page 01-01 is performed.
However, the setting temperature is raised 1°C and the room temperature correct coefficient value is 0°C.
When the compressor speed have been below 23Hz for 8 minutes or the room temperature reaches
"setting temperature -1.5°C" , operation is automatically switched to DRY OPERATION of page 01-03
is performed.
However, compressor control based on room temperature is as follows.
If the room temperature reaches "setting temperature +2°C" during DRY operation,
operation returns to COOLING operation.
When COOLING was selected at , the air conditioner operates as follow:
1
2
3When HEATING was selected at , the same operation as HEATING OPERATION of page 01-02
is performed. However, the room temperature correct coefficient value is 0°C.
1
4When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the COOLING or HEATING operation mode was selected at above, operation is switched
to MONITORING and the operation mode is selected again.
1
Room
temperature Compressor :ON
Compressor :OFF
Ts - 0.5°C
Ts - 1.5°C
Outdoor temperature

1-5. INDOOR FAN CONTROL
1. Fan speed
( Table 5 : Indoor Fan Speed )
2. FAN OPERATION
The airflow can be switched in 5 steps such as AUTO, QU, LOW, MED, HIGH, while the indoor
fan only runs.
When [AUTO] is selected, the indoor fan motor runs continuously [MED] mode.
3. COOLING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 6.
On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow of [COOL]
operation modes QU, LOW, MED, HIGH,as shown in Table 5.
( Fig.6 : 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
AU*A30/36LBLU
01-05
AB*A30/36LBT
AR*A30/36LBTU
Operation mode Air flow mode Speed (rpm)
Hi 830
700
600
550
Me
Lo
Cooling / Heating
Qu
AutoDry
S-Lo 250Monitoring
400
Operation mode Air flow mode Speed (rpm)
Hi 1200
1000
830
650
Me
Lo
Cooling
Qu
Hi 1200
1100
1000
830
Me+
Me
Heating
Lo
650Qu
Auto
500
Dry
S-Lo 250Monitoring
650
Cool Air Prevention
Operation mode Air flow mode Speed (rpm)
Hi 650
550
500
400
Me
Lo
Cooling
Qu
Hi 650
600
550
500
Me+
Me
Heating
Lo
400Qu
Auto
350
Dry
S-Lo 250Monitoring
400
Cool Air Prevention
MED mode
LOW mode

01-06
4. HEATING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 7.
On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow
of [HEAT] operation modes QU, LOW, MED, HIGH, as shown in Table 5.
5. 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.
When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 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.7 : Airflow change - over ( Heating : AUTO ) )
( Fig.8 : Cool Air Prevention Control )
< [Hi] setting > < The other of [Hi] setting >
Indoor heat exchanger
temperature
Indoor heat exchanger
temperature
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
24°C
S-Lo
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
S-LOW mode
Indoor heat exchanger
temperature
Indoor heat exchanger
temperature
HIGH mode
Indoor heat exchanger
temperature
Indoor heat exchanger
temperature
(1) Fan mode : HIGH (2) Fan mode : MED, LOW, QUIET
5-1. For AB / AU Type
5-2. For AR Type
HIGH mode
MED mode
LOW mode
S-Lo
Lo (Qu)
Cool air
prevention
Setting
FAN mode
32°C
34°C
24°C
39°C
37°C
30°C
37°C
30°C
32°C
24°C
LOW mode
S-LOW mode
37°C
30°C
32°C
24°C
SETTING
FAN MODE
LOW mode

1-6. OUTDOOR FAN CONTROL
Following table shows the fan speed of the outdoor unit.
Table 6 : Fan speed of the outdoor unit
Table 7 : Fan speed when starting up outdoor fan
Outdoor temperature zone
The outdoor fan speed is changed in the range of the speed shown in the above table6,
based on the speed of the compressor.
(When the compressor speed increases, the outdoor fan speed is also changed to
higher speed. If the compressor speed 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 900rpm regardless of the compressor speed.
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.
Cooling Dry
850/ 800/ 620/ 500/ 400 rpm 550/ 450 rpm
AO*A30LFTL
AOTA30LGTL
Outdoor temperature zone Fan speed
500 rpm
200 rpm
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
Heating
900/ 800/ 620/ 550/ 450 rpm
500/ 320/ 250 rpm
G zone 300/ 250/ 200 rpm 300/ 250/ 200 rpm
F zone
D zone
12°C
2°C
10°C
0°C
D zone ( Normal )
F zone
G zone
Outdoor temperature zone
COOLING D zone (Normal) / HEATING
COOL F,G zone
01-07
500/ 320/ 250 rpm
G zone
F zone
D zone
AO*A36LFTL 900/ 800/ 620/ 500/ 400 rpm 550/ 450 rpm
500/ 320/ 250 rpm
300/ 250/ 200 rpm 300/ 250/ 200 rpm
500/ 320/ 250 rpm
AO*A30LFTL
AOTA30LGTL
AO*A36LFTL 900/ 800/ 620/ 550/ 450 rpm

1-7. LOUVER CONTROL
01-08
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)
(Air Direction Range)
(Operation Range)
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 mode :
During Heating/Fan 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 mode
Range of swing
to
Heating mode
5
5
to 53
5
Ceiling type
Fan mode 5 to

01-09
3. HORIZONTAL LOUVER CONTROL
Each time the button is pressed, the air direction range will change as follows:
(Function Range)
(Air Direction Range)
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
Heating
5
FAN
Use the air direction adjustments within the ranges shown above.
The remote control unit's display does not change.
to 5(All range)
to 5(All range)
to 5(All range)

01-10
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.
(Function Range)
(Fig.9 : Air Direction Range)
(Operation Range)
During Cooling/Dry mode/Fan mode :
During Heating mode :
Cooling / Dry / Fan mode Horizontal flow
Heating mode Downward flow
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 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 / Heating / Dry / Fan
Range of swing
to
Cassette type

1-8. COMPRESSOR CONTROL
1. OPERATION SPEED RANGE
The operation speed 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 Speed Range)
2. OPERATION SPEED CONTROL AT START UP
The compressor speed soon after the start-up is controlled as shown in Figure 8.
(Fig.8 : Compressor Control at Start-up)
01-11
AO*A30LFTL
AO*A36LFTL
AOTA30LGTL
16rps 72rps 16rps 90rps 29rps
60 (sec)120 180
30
47
60
(rps)

01-12
AR-6TC1
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
Use this timer function to set operating time for each day of the week.
The weekly timer allows up to two ON and OFF time to set up per day.
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
Wired Remote Controller
ON / TIMER
OFF / TIMER
WEEKLY TIMER
TEMPERATURE SET BACK TIMER
1-9. TIMER OPERATION CONTROL

01-13
The DAY OFF setting is only available for days for which weekly settings already exist.
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.
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
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:
26°C 24°C

01-14
2. PROGRAM TIMER
The program timer allows the OFF timer and ON timer to be used in combination one time.
Operation will start from the timer setting (either OFF timer or ON timer)
whichever is closest to the clock's current timer setting.
The order of operations is indicated by the arrow in the remote control unit's display.
SLEEP timer operation cannot be combined with ON timer operation.
Wireless Remote Controller
Operation mode
Stop mode Stop mode Stop mode
Operation mode Operation mode
Set time Set time Set time Set time
AR-SY1
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
ON / TIMER
OFF / TIMER
PROGRAM TIMER
SLEEP TIMER

01-15
3. SLEEP TIMER
If the sleep timer is set, the room temperature is monitored and the operation is stopped automatically.
If the operation mode or the set temperature is change after the sleep timer is set, the operation is
continued according to the changed setting of the sleep timer from that time ON.
Set temperature rises
( Ts : Set temperature )
Stop of operation
Set temperature lowers
( Ts : Set temperature )
Ts
Stop of operation
In the cooling operation mode
When the sleep timer is set, the setting temperature is increased 1 degC.
It increases the setting temperature another 1 degC after 1 hour.
After that, the setting temperature is not changed and the operation is stopped at the time
of timer setting.
Ts
+1degC
+2degC
-2degC
-1degC
-4degC
-3degC
Set 60min
In the heating operation mode
When the sleep timer is set, the setting temperature is decreased 1 degC.
It decreases the setting temperature another 1 degC every 30 minutes.
Upon lowering 4 degC, the setting temperature is not changed and the operation stops
at the time of timer setting.
Set 30min 60min 90min