Fujitsu AW?Z24LBC Original operating manual

SPLIT TYPE
ROOM AIR CONDITIONER
CEILING WALL
type
Models Indoor unit Outdoor unit
AW Z24LBC AO Z24LBT
INVERTER
SERVICE
INSTRUCTION
R410A

CONTENTS
1. SPECIFICATION
AW *Z24LBC, AO*Z24LBT.............................................................................................
2. DIMENSIONS
AW *Z24LBC, AO*Z24LBT.............................................................................................
3. REFRIGERANT SYSTEM DIAGRAM
AW *Z24LBC, AO*Z24LBT.............................................................................................
4. CIRCUIT DIAGRAM
AW *Z24LBC, AO*Z24LBT.............................................................................................
5. 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.............................................................................
18. COIL DRY OPERATION CONTROL..........................................................................
17. COMPRESSOR PREHEATING..................................................................................
20. DEFROST OPERATION CONTROL..........................................................................
22. VARIOUS PROTECTIONS.........................................................................................
21. OFF DEFROST OPERATION CONTROL..................................................................
01-01
02-01
03-01
04-01
05-01
05-02
05-03
05-04
05-05
05-07
05-08
05-09
05-10
05-12
05-12
05-12
05-12
05-13
05-13
05-13
05-13
19. UV FILTER CLEANING CONTROL............................................................................ 05-14
05-16
05-18
05-19
05-12

6. REFRIGERANT CAUTION -R410A-
1. R410A TOOLS............................................................................................................
3. PRECAUTION FOR SERVICING...............................................................................
2. PRECAUTION FOR INSTALLATION.........................................................................
5. DEFFERENCE FROM CONVENTIONAL MODEL(R22) AND PRECAUTIONS........
4. NEW REFRIGERANT R410A.....................................................................................
7. TROUBLE SHOOTING
1. WHEN THE UNIT DOES NOT OPERATE AT ALL....................................................
3. TROUBLE SHOOTING METHOD
2. SELF DIAGNOSIS FUNCTION..................................................................................
1. EXPLODED VIEW......................................................................................................
2. INVERTER ASSEMBLY SPECIFICATION.................................................................
8. APPENDING DATA
1. JUMPER SETTING OF INDOOR UNIT AND OUTDOOR UNIT................................
3. CAPACITY/INPUT DATA............................................................................................
4. THERMISTOR RESISTANCE VALUES............................................... .....................
2. OUTDOOR UNIT PRESSURE VALUE AND TOTAL ELECTRIC
CURRENT CURVE...................................................................................................
9. REPLACEMENT PARTS
10. INSTALLATION MANUAL
4. SELF-DIAGNOSIS FUNCTION AND CHECKING POINTS.......................................
5. SERIAL SIGNAL DIAGNOSIS....................................................................................
6. IPM PROTECTION.....................................................................................................
8. TROUBLE SHOOTING OF REFRIGERANT CYCLE.................................................
06-01
06-02
06-04
06-05
06-08
07-01
07-02
07-03
07-07
07-08
7. ACTIVE FILTER FAILURE..........................................................................................07-09
08-01
08-02
08-04
08-06
09-01
09-18
07-10

1 . SPECIFICATIONS
R410A
CEILING WALL type
INVERTER

HEATING CAPACITY
POWER SUPPLY
RUNNING
CURRENT
COOLING
HEATING 10.3 A
INPUT WATTS COOLING
HEATING 2.35 kW
E.E.R. COOLING
HEATING
COOLING
HEATING
3.62 kW/kW
MOISTURE REMOVAL
AIR CIRCULATION
HIGH
Cooling and heating inverter
AW *Z24LBC
AO*Z24LBT
7.1 kW
8.5 kW
TYPE
INDOOR UNIT
OUTDOOR UNIT
COOLING CAPACITY
230 V 50 Hz
9.7 A
2.21 kW
3.0 L/hr
3.21 kW/kW
ELECTRICAL DATA
POWER SOURCE 230 V
HIGH SPEED 1,500 r.p.m. / 1,700 r.p.m.
HIGH2 1,700 r.p.m. / 1,850 r.p.m.
INDOOR UNIT
( cool / heat )
MED SPEED 1,370 r.p.m. / 1,540 r.p.m.
SUPER QUIET 1,030 r.p.m. / 1,120 r.p.m.
QUIET 1,130 r.p.m. / 1,260 r.p.m.
LOW SPEED 1,250 r.p.m. / 1,390 r.p.m.
OUTDOOR UNIT ( cool / heat ) 850 r.p.m. / 900 r.p.m.
FAN MOTOR
DIMENSIONS and WEIGHT
INDOOR UNIT H x W x D
OUTDOOR UNIT 830 x 900 x 330 mm
250 x 899 x 298 mm
INDOOR UNIT Gross / Net
H x W x D
Gross / NetOUTDOOR UNIT 70 kg / 62 kg
17.5 kg / 14 kg
REFRIGERANT CHARGE (R410A)
FULL CHARGE 2,100 g
15 m
20 m
25 m
30 m
Pipe Length
2,200 g
1,900 g
2,000 g
ADDITIONAL CHARGE 20 g/m
MAX PIPE LENGTH 30 m
COMPRESSOR
TYPE
DISCRIMINATION
REFRIGERANT R410A 1,900 g
5KD240XAD21
Hermetic type, DC Inverter,
Twin rotary
SPECIFICATIONS
HIGH SPEED
HIGH SPEED
880 m3/hr
980 m3/hr
47 dB / 47 dB
43 dB / 43 dB
40 dB / 40 dB
36 dB / 36 dB
32 dB / 32 dB
53 dB / 54 dB
HIGH2 49 dB / 49 dB
HIGH2 53 dB / 54 dB
INDOOR UNIT
( cool / heat )
MED SPEED
LOW SPEED
SUPER QUIET
QUIET
OUTDOOR UNIT
( cool / heat )
NOISE LEVEL
Note :
Noise was measured in accordance with JIS standards, Japan.
"HIGH2" means when ability measurement.
01-01

2 . DIMENSIONS
R410A
CEILING WALL type
INVERTER

(Unit : mm)
DIMENSIONS
INDOOR UNIT
02-01
Models : AW * Z24LBC
300
298
899
250
170
40

OUTDOOR UNIT
(unit : mm)
77900
830
21
9
400
33031 12
196
147
170
99
370
650
Air Flow
02-02
Models : AO * Z24LBT

3 . REFRIGERANT SYSTEM DIAGRAM
R410A
CEILING WALL type
INVERTER

REFRIGERANT SYSTEM DIAGRAM
2-Way valve
(Small)
3-Way valve
(Large)
Strainer
Strainer
Muffler
Pressure
switch
4-Way valve
Expansion valve
Heat exchanger
( INDOOR )
Heat exchanger
( OUTDOOR )
Sub-accumulator
Compressor
Refrigerant pipe diameter
Liquid : 1/4" (6.35 mm)
Gas : 5/8" (15.88 mm)
Cooling
Heating
03-01
Models : AW * Z24LBC / AO * Z24LBT

4 . CIRCUIT DIAGRAM
R410A
CEILING WALL type
INVERTER

INDOOR UNIT
CIRCUIT DIAGRAM
04-01
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
RED
RED
RED
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
BROWN
ORANGE
YELLOW
GREEN
BLUE
PURPLE
GRAY
WHITE
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
RED
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
BLUE
YELLOW
WHITE
BLACK
RED
WHITE WHITE
WHITE WHITE WHITE WHITE
WHITE
WHITE
RED RED
WHITE
RED
WHITE WHITE WHITE
WHITE RED
WHITE
RED
WHITE
WHITE
BROWN RED
ORANGE
YELLOW
BROWN
RED ORANGE YELLOW
WHITE WHITE
WHITE WHITE WHITE
RED RED
BLUE
WHITE
BLACK
RED
BLACK BLACK BLACK BLACK
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
11
10
9
8
7
6
5
4
3
2
1
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
11
10
9
8
7
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
1
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
1
10
9
8
7
6
5
4
3
2
1
12345678
12345678 1234561234
12
1212345
12345
12345
12345 12
12 12345678
12345
12345
1234
1234
123
123
123
12 12
CN205
TEST
CN12CN17
CN7
CN6
CN3
CN4
CN16
CN9
CN206
CN15
CN11
CN201 CN200 CN203 CN202 CN204
CN208
CN210
3
3
1
1
SW (LEFT)
SW (RIGHT)
THERMAL
FUSE 102
AIR FILTER (LEFT)
AIR FILTER (RIGHT)
THERMAL
FUSE 102
TM1 TM2
LOUVER U
LOUVER Z
LOUVER
(RIGHT-LEFT)
DIFFUSER
FAN MOTOR
CONNECTOR (WHITE)
CONNECTOR (WHITE)
CONNECTOR (RED)
CONNECTOR (RED)
ROOM TEMP. THERMISTOR
PIPE TEMP. THERMISTOR
RECEIVER PCB
UV-LED UNIT
W3
CONTROLLER PCB
F M
M
M
CONNECTOR PCB
INDICATOR PCB
M
M
M
M
TM4
WHITE
BLACK
RED
THERMAL
FUSE 102
TERMINAL
NL3
OUTDOOR UNIT
Models : AW * Z24LBC

OUTDOOR UNIT
04-02
RED
RED
BROWN
BROWN
BLUE
BLUE
BLACK
BLACK
BROWN
BROWN
BLACK
BLACK
WHITE
YELLOW
ORANGE
BLUE
BROWN
RED
BROWN
YELLOW
WHITE
BLACK
RED
RED
BLACK
GREEN
BLACK
WHITE
WHITE
BLACK
PURPLE
WHITE
YELLOW YELLOW
BLUE BLUE
BLACK
RED
BROWN
ORANGE
BLACK BLACK
WHITE WHITE
RED RED
ORANGE
ORANGE
BLACK WHITE BROWN RED BROWN RED ORANGE YELLOW GREEN BLUE PURPLE GRAY BLACK WHITE BROWN RED ORANGE YELLOW
BLACK
BLACK
WHITE
GRAY
WHITE WHITE
109
87654
321
109
87654
321
21
109
87654
321
109
87654
321
654
321
654
321
4
321
4
321
4
321
4
321
321
321
21
21
21
7
6
5
4
3
21
21
2
1
6
5
4
3
2
1
7
6
5
4
3
2
1
6
5
4
3
2
1
3
2
1
3
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
CN700
CN801
CN500
CN110CN1
CN400
CN200
CN11
CN60
CN61
CN62
CN64
CN90
CN40CN42
CN303 CN301 W306
W307
W302
W301
W17
W16
TM102
TM101
W303
W
W304
VW305
U
W8
W7
W13
W12
L2 L1
+
P
N1
N2
I O
TM600
TM601
W4
RC
S
CN100
12
W29
W28
W25
W26
W21 W20
W9 W17
W3
W18
W2
W1
W19
WHITE WHITE
TERMINAL
FUSE 250V 25A
123LN
POWER SOURCE
TO INDOOR UNIT
FAN MOTOR
EXPANSION VALVE
4-WAY VALVE
F M
PMV
4WV
DISCHARGE TEMP. THERMISTOR
PIPE TEMP. THERMISTOR
OUTDOOR TEMP. THERMISTOR
COMPRESSOR TEMP. THERMISTOR
HIGH PRESSURE SWITCH
CHOKE COIL
POSISTOR
COMPRESSOR
C M
CONNECTOR
CONNECTOR
CAPACITOR PCB
ACTPM
I P M PCB
POWER SUPPLY PCB
CONTROLLER PCB
( MAIN PCB )
Models : AO * Z24LBT

5 . DESCRIPTION OF EACH
CONTROL OPERATION
R410A
CEILING WALL type
INVERTER

1. COOLING OPERATION
1-1 COOLING CAPACITY CONTROL
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 2°C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
minimum
frequency
maximum
frequency
maximum
frequency
AW * Z24LBC 21Hz 47Hz 63Hz
Outside air Outside air
temperature temperature
36°C
A zone
34°C
32°C
B zone
30°C 21°C
C zone
19°C
D zone
Hi Me Lo Quiet
A zone 63Hz 43Hz 37Hz 27Hz
B zone 63Hz 43Hz 37Hz 27Hz
C zone 57Hz 39Hz 33Hz 23Hz
24LBC
D zone 39Hz 31Hz 27Hz 21Hz
E zone 39Hz 31Hz 27Hz 21Hz
F zone 39Hz 31Hz 27Hz 21Hz
S-Quiet
25Hz
25Hz
21Hz
21Hz
21Hz
21Hz
( Table 1 : Compressor Frequency Range )
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency to Maximum Frequency .
The room temperature is controlled 1°C lower than the setting temperature for 40 minutes
after starting the operation.
After 40 minutes, it is controlled based on the normal setting temperature.
05-01
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 Figure 1 based on the
fan speed mode and the outdoor temperature.
* If the room temperature is 2.5°C lower than a set temperature, the compressor will be
stopped.
( Fig.1 : Limit of Maximum Frequency based on Outdoor Temperature )

2. HEATING OPERATION
2-1 HEATING CAPACITY CONTROL
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 higher 2.5°C than a set temperatire, the compressor will be
stopped.
minimum
frequency
maximum
frequency
AW * Z24LBC 21Hz 87Hz
Outside air Outside air
temperature temperature
19°C
C zone
17°C
14°C
B zone
12°C
A zone
Hi Me Lo Quiet
A zone 87Hz 63Hz 51Hz 49Hz
B zone 87Hz 63Hz 51Hz 47Hz
24LBC
C zone 87Hz 63Hz 51Hz 43Hz
S-Quiet
47Hz
43Hz
39Hz
* When the room temperature is between +2°C to -3°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table2.
However, the maximum frequency is limited in the range shown in Figure 2 based on the
fan speed mode and the outdoor temperature.
( Table 2 : Compressor Frequency Range )
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
* The room temperature is controlled 2°C higher than the setting temperature for 60 minutes
after starting the operation.
After 60 minutes, it is controlled based on the normal setting temperature.
05-02

3. DRY OPERATION
3-1 INDOOR UNIT CONTROL
The compressor rotation 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 3. However, after the compressor is driven, the indoor unit shall
run at operation frequency of 58Hz, for a minute.
Operating
frequency
AW * Z24LBC 23Hz
room room
temperature temperature
compressor ON
Ts+1.5°C
Ts+0.5°C
compressor OFF
Compressor
ON
OFF
Indoor fan
Dry air flow
S-Lo
OFF
( Table 3 : Compressor frequency )
( Fig.3 : Compressor Control based on Room Temperature )
( Fig.4 : Indoor Fan Control )
05-03
10 30 60 180 60 180 60 10 30 (SEC)

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, 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.
.When operation starts, only the indoor and outdoor fans are operated for 1 minute. After 1 minute,
the room temperature and outside air temperature are sensed and the operation mode is
selected in accordance with the table below.
C zone
32°C
B zone
-10°C
A zone
( Table.4 Operation mode selection table)
Outside air temperature (To)
Room temperature (Tb)
A zone B zone C zone
Tb > Ts+2°C
Tb < Ts - 2°C
Monitoring Cooling
(automatic dry)
Cooling
(automatic dry)
Ts+2°C Tb Ts - 2°C Monitoring Monitoring Monitoring
Heating Heating Monitoring
.When COOING was selected at , the air conditioner operates as follow:
The same operation as COOLING OPERATION of item 1 above is performed.
When the room temperature has remained at (set temperature -1°C) for 8 minutes, operation is
automatically switched to DRY and the same operation as DRY OPERATION of item 3 above
is performed.
If the room temperature reaches (set temperature +2°C during DRY operation, operation returns to
COOLING operation.
.When HEATING was selected at , the same operation as HEATING OPERATION of item 2
above is performed.
When 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
1
2
31
4
1
( Fig.5 : Outside air temperature zone selection )
05-04

5. INDOOR FAN CONTROL
(1).Fan speed
( Table 5 : Indoor Fan Speed )
Except S-Quiet
(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.
AW * Z24LBC
Operation mode Air flow mode Speed (rpm)
Hi 1,700
Me+ 1,610
Me 1,510
Lo 1,390
Quiet 1,260
S-Quiet
S-Quiet
S-Quiet
1,120
Cool air
prevention 850
Heating
S-Lo 480
Hi 1,500
Me 1,370
Lo 1,250
Cooling
Fan
Quiet
1,030
1,130
Dry
1,030
05-05
1,130

(3).COOLING OPERATION
Switch the airflow [AUTO], and the (Fig.6)
indoor fan motor will run according airflow change - over ( Cooling:AUTO )
to a room temperature, as shown in When the room
Figure 6. temperature rises
On the other hand, if switched in
[HIGH] [QUIET], the indoor motor +2.5°C
will run at a constant airflow of [COOL]
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5. +1.5°C
+1°C
LOW mode
When the room
temperature lowers
(Room temperature) D (Setting temperature)
(4).DRY OPERATION
(5).HEATING OPERATION
Switch the airflow [AUTO], and the (Fig.7)
indoor fan motor will run according airflow change - over ( Heating:AUTO)
to a room temperature, as shown in When the room
Figure 7. temperature rises
On the other hand, if switched LOW mode
[HIGH] [QUIET], the indoor motor -1°C
will run at a constant airflow of [HEAT] -1.5°C
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5. -2°C
-2.5°C
MED + mode
When the room
temperature lowers
(Room temperature) D (Setting temperature)
(6).COOL AIR PREVENTION CONTROL (Heating mode)
Indoor heat exchanger Indoor heat exchanger
temperature temperature
47°C Hi
40°C Me+
37°C
Lo
Cool air prevention
30°C
S-Lo
Refer to the table 4.
Durring the dry mode operation, the fan speed
setting can not be changed.
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.
(Fig.8 : Cool Air Prevention Control)
05-06
40°C
28°C
32°C
34°C
HIGH mode
MED mode
+2°C
MED mode