Fujitsu ASBG18KMBA Service manual

AIR CONDITIONER
Wall mounted type
DESIGN & TECHNICAL MANUAL
INDOOR
ASBG18KMBA
ASBG24KMBA
OUTDOOR
AOBG18KMCA AOBG24KMCA
DR_AS181EF_01
2023.02.16

Notices:
• Product specifications and design are subject to change without notice for future improvement.
• For further details, please check with our authorized dealer.
Trademarks
FGLair™ is trademark of Fujitsu General Limited in the United States, other countries or both.
Google Play™ is trademark of Google LLC.
App Store® is a service mark of Apple Inc., registered in the U.S. and other countries.
Copyright © 2023 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................3
2-1. Models: ASBG18KMBA and ASBG24KMBA ...................................................................3
3. Wiring diagrams ............................................................................................5
3-1. Models: ASBG18KMBA and ASBG24KMBA ...................................................................5
4. Capacity table................................................................................................6
4-1. Cooling capacity...............................................................................................................6
4-2. Heating capacity ..............................................................................................................7
5. Fan performance ...........................................................................................8
5-1. Air velocity distributions....................................................................................................8
5-2. Airflow ............................................................................................................................10
6. Operation noise (sound pressure).............................................................12
6-1. Noise level curve............................................................................................................12
6-2. Sound level check point .................................................................................................13
7. Safety devices .............................................................................................14
8. External input and output...........................................................................15
8-1. External input.................................................................................................................15
8-2. External output...............................................................................................................17
9. Group connection .......................................................................................18
9-1. Precautions on creating a group connection..................................................................18
9-2. Remote controller address setting procedure for wireless remote controllers................19
10. Remote controller .......................................................................................20
10-1.Wireless remote controller ............................................................................................20
11. Function settings .......................................................................................22
11-1.Function settings by using remote controller.................................................................22
11-2.Custom code setting for wireless remote controller.......................................................26
12. Accessories.................................................................................................27
12-1.Models: ASBG18KMBA and ASBG24KMBA ................................................................27
13. Optional parts .............................................................................................28
13-1.Controllers ....................................................................................................................28
13-2.Others ...........................................................................................................................29

Part 2. OUTDOOR UNIT.....................................................................31
1. Specifications..............................................................................................32
2. Dimensions..................................................................................................33
2-1. Model: AOBG18KMCA ..................................................................................................33
2-2. Model: AOBG24KMCA ..................................................................................................34
3. Installation space ........................................................................................35
3-1. Models: AOBG18KMCA and AOBG24KMCA ................................................................35
4. Refrigerant circuit .......................................................................................38
4-1. Model: AOBG18KMCA ..................................................................................................38
4-2. Model: AOBG24KMCA ..................................................................................................39
5. Wiring diagrams ..........................................................................................40
5-1. Model: AOBG18KMCA ..................................................................................................40
5-2. Model: AOBG24KMCA ..................................................................................................41
6. Capacity compensation rate for pipe length and height difference........42
6-1. Model: AOBG18KMCA ..................................................................................................42
6-2. Model: AOBG24KMCA ..................................................................................................43
7. Additional charge calculation ....................................................................44
7-1. Model: AOBG18KMCA ..................................................................................................44
7-2. Model: AOBG24KMCA ..................................................................................................44
8. Airflow..........................................................................................................45
8-1. AOBG18KMCA ..............................................................................................................45
8-2. AOBG24KMCA ..............................................................................................................45
9. Operation noise (sound pressure).............................................................46
9-1. Noise level curve............................................................................................................46
9-2. Sound level check point .................................................................................................47
10. Electrical characteristics............................................................................48
11. Safety devices .............................................................................................49
12. Accessories.................................................................................................50
12-1.Models: AOBG18KMCA and AOBG24KMCA ...............................................................50
CONTENTS (continued)

Part 1. INDOOR UNIT
WALL MOUNTED TYPE:
ASBG18KMBA
ASBG24KMBA

1. Specifications
Type
Wall mounted
Inverter, Heat pump
Model name ASBG18KMBA ASBG24KMBA
Power supply 220 V~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 198—242 V
Capacity
Cooling
Rated kW 5.27 7.03
Btu/h 18,000 24,000
Min.—Max. kW 0.9—5.8 0.9—8.0
Btu/h 3,100—19800 3,100—27,300
Heating
Rated kW 5.27 7.03
Btu/h 18,000 24,000
Min.—Max. kW 0.9—5.8 0.9—8.0
Btu/h 3,100—19,800 3,100—27,300
Input power
Cooling Rated
kW
1.59 1.96
Min.—Max. 0.17—1.83 0.27—2.78
Heating Rated 1.36 1.81
Min.—Max. 0.25—1.8 0.28—3.16
Current Cooling Rated A 7.4 9.1
Heating 6.6 8.4
EER Cooling kW/kW 3.31 3.59
COP Heating 3.88 3.88
Sensible capacity Cooling kW 4.17 5.25
Power factor Cooling %98 98
Heating 94 98
Moisture removal L/h (pints/h) 2.1 (3.7) 3.5 (6.2)
Maximum operating current*1Cooling A9.0 13.5
Heating 10.5 16.0
Fan
Airflow rate
Cooling
HIGH
m3/h
880 1,040
MED 740 900
LOW 620 740
QUIET 480 580
Heating
HIGH 880 1,040
MED 740 900
LOW 620 740
QUIET 480 580
Type × Qty Crossflow fan × 1
Motor output W 42
Sound pressure level*2
Cooling
HIGH
dB (A)
43 49
MED 37 42
LOW 33 37
QUIET 26 32
Heating
HIGH 42 48
MED 37 42
LOW 33 37
QUIET 27 32
Heat exchanger
Dimensions (H × W × D)
mm
Main: 378 × 832 × 26.6
Sub: 84 × 832 × 13.3
Main: 378 × 832 × 26.6
Sub: 168 × 832 × 13.3
Fin pitch Main: 1.2
Sub: 1.4
Rows × Stages Main: 2 × 18
Sub: 1 × 4
Main: 2 × 18
Sub: 1 × 8
Pipe type Copper tube
Fin type Aluminum
Enclosure
Material Polystyrene
Color White + Pearl white (painted)
Approximate color of Munsell N9.25/
Dimensions
(H × W × D)
Net mm 320 × 998 × 238
Gross 329 × 1,090 × 420
Weight Net kg 13.5 14.0
Gross 17.5 18.0
Connection pipe Size Liquid mm (in) Ø6.35 (Ø1/4) Gas Ø12.70 (Ø1/2)
Method Flare
Drain hose Material PVC
Tip diameter mm Ø12.0 (I.D.), Ø16.0 (O.D.)
Operation range Cooling °C 18 to 32 %RH 80 or less
Heating °C 16 to 30
Remote controller Wireless (Option: Wired, Mobile app*3 [FGLair™])
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 27°CDB/19°CWB, and outdoor temperature of 35°CDB/24°CWB.
– Heating: Indoor temperature of 20°CDB/15°CWB, and outdoor temperature of 7°CDB/6°CWB.
– Pipe length: 5 m, Height difference: 0 m. (Between outdoor unit and indoor unit.)
• Protective function might work when using it outside the operation range.
• *1: Maximum current is maximum value when operated within the operation range.
• *2: Sound pressure level:
– Measured values in manufacturer’s anechoic chamber.
– Because of the surrounding sound environment, the sound levels measured in actual installation conditions might be higher than the specified values here.
• *3: Available on Google Play™ store or on App Store®. Optional WLAN Adapter is also required. For details, refer to the setting manual.
- 2 - 1. Specifications
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

2. Dimensions
2-1. Models: ASBG18KMBA and ASBG24KMBA
Unit: mm
998
238
320
Outline of unit
471 67
28
46
43861 102397
432
56
56
10
ø80
ø80
17
390
443
590
- 3 -
2-1. Models: ASBG18KMBA and ASBG24KMBA 2. Dimensions
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

¢Installation space requirement
Provide sufficient installation space for product safety.
Unit: mm
63 or more
80 or more
53 or more
52 or more
80 or more
Outline of unit
120 or more
1,500 or more
2,300 or more
- 4 -
2-1. Models: ASBG18KMBA and ASBG24KMBA 2. Dimensions
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

3. Wiring diagrams
3-1. Models: ASBG18KMBA and ASBG24KMBA
- 5 -
3-1. Models: ASBG18KMBA and ASBG24KMBA 3. Wiring diagrams
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

4. Capacity table
Capacity tables show each of following values calculated based on the outdoor temperature and the
indoor temperature, under given Airflow Rate (AFR):
For cooling capacity: Total Capacity (TC), Sensible Heat Capacity (SHC), and Input Power (IP)
For heating capacity: Total Capacity (TC) and Input Power (IP)
4-1. Cooling capacity
¢Model: ASBG18KMBA
AFR m3/h 880
Indoor temperature
°CDB 18 21 23 25 27 29 32
°CWB 12 15 16 18 19 21 23
Outdoor temperature
°CDB TC SHC IP TC SHC IP TC SHC IP TC SHC IP TC SHC IP TC SHC IP TC SHC IP
kW kW kW kW kW kW kW
18 3.57 3.37 0.65 3.84 3.52 0.64 4.02 3.62 0.63 4.20 3.72 0.63 4.38 3.82 0.62 4.58 3.89 0.62 4.87 3.99 0.62
20 4.87 4.03 1.14 5.26 4.18 1.15 5.51 4.28 1.15 5.77 4.38 1.15 6.03 4.49 1.16 6.30 4.54 1.15 6.72 4.63 1.15
25 4.69 3.94 1.28 5.06 4.09 1.29 5.30 4.19 1.30 5.54 4.28 1.31 5.79 4.38 1.32 6.07 4.45 1.33 6.50 4.55 1.34
30 4.50 3.84 1.41 4.86 3.99 1.44 5.10 4.09 1.46 5.34 4.20 1.47 5.58 4.30 1.49 5.85 4.36 1.51 6.25 4.47 1.53
35 4.31 3.74 1.53 4.63 3.88 1.55 4.84 3.98 1.56 5.06 4.07 1.58 5.27 4.17 1.59 5.56 4.25 1.63 6.00 4.37 1.69
40 3.67 3.42 1.32 3.89 3.55 1.32 4.04 3.63 1.32 4.19 3.72 1.32 4.34 3.81 1.32 4.55 3.88 1.32 4.88 3.99 1.32
46 2.59 2.59 0.98 2.78 2.78 0.98 2.91 2.91 0.98 3.04 3.04 0.98 3.17 3.17 0.98 3.29 3.29 0.98 3.48 3.48 0.98
50 2.34 2.34 0.96 2.51 2.51 0.96 2.63 2.63 0.96 2.74 2.74 0.96 2.85 2.85 0.96 2.95 2.95 0.96 3.09 3.09 0.96
¢Model: ASBG24KMBA
AFR m3/h 1,040
Indoor temperature
°CDB 18 21 23 25 27 29 32
°CWB 12 15 16 18 19 21 23
Outdoor temperature
°CDB TC SHC IP TC SHC IP TC SHC IP TC SHC IP TC SHC IP TC SHC IP TC SHC IP
kW kW kW kW kW kW kW
18 4.21 3.94 0.67 4.55 4.11 0.66 4.77 4.23 0.66 4.99 4.34 0.65 5.21 4.45 0.65 5.45 4.53 0.64 5.81 4.64 0.63
20 6.37 5.15 1.38 6.88 5.32 1.39 7.22 5.44 1.40 7.56 5.55 1.41 7.90 5.67 1.42 8.28 5.73 1.42 8.84 5.82 1.42
25 6.13 5.01 1.54 6.62 5.18 1.57 6.95 5.29 1.58 7.28 5.41 1.60 7.60 5.52 1.61 7.99 5.59 1.62 8.56 5.70 1.63
30 5.89 4.87 1.69 6.36 5.04 1.72 6.68 5.16 1.74 7.00 5.27 1.77 7.32 5.39 1.79 7.67 5.45 1.80 8.19 5.55 1.82
35 5.63 4.72 1.82 6.09 4.90 1.87 6.41 5.01 1.90 6.72 5.13 1.93 7.03 5.25 1.96 7.39 5.33 1.99 7.94 5.44 2.02
40 5.35 4.56 1.97 5.73 4.71 1.97 5.98 4.81 1.97 6.23 4.91 1.97 6.49 5.00 1.97 6.75 5.06 1.97 7.14 5.13 1.97
46 3.85 3.76 1.45 4.15 3.93 1.45 4.35 4.04 1.45 4.55 4.16 1.45 4.75 4.27 1.45 4.97 4.35 1.45 5.30 4.46 1.45
50 3.50 3.50 1.45 3.74 3.74 1.45 3.91 3.85 1.45 4.07 3.96 1.45 4.23 4.07 1.45 4.44 4.16 1.45 4.76 4.28 1.45
- 6 -
4-1. Cooling capacity 4. Capacity table
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

4-2. Heating capacity
¢Model: ASBG18KMBA
AFR m3/h 880
Indoor temperature
16 18 20 22 24
Outdoor temperature
°CDB °CWB TC IP TC IP TC IP TC IP TC IP
kW kW kW kW kW
-15 -16 3.02 1.22 2.98 1.24 2.93 1.27 2.89 1.28 2.84 1.30
-10 -11 3.57 1.35 3.51 1.37 3.46 1.40 3.43 1.41 3.39 1.42
-5 -7 4.11 1.48 4.10 1.48 4.08 1.49 4.01 1.51 3.94 1.53
0 -2 4.84 1.58 4.81 1.60 4.79 1.63 4.72 1.66 4.66 1.69
5 3 5.57 1.69 5.53 1.73 5.49 1.77 5.43 1.81 5.37 1.86
7 6 6.03 1.78 5.92 1.79 5.80 1.80 5.77 1.86 5.74 1.91
10 8 6.24 1.77 6.20 1.82 6.17 1.88 6.10 1.94 6.04 1.99
15 10 4.18 0.87 4.16 0.87 4.15 0.87 4.12 0.90 4.09 0.94
20 15 4.70 0.84 4.67 0.86 4.63 0.89 4.60 0.93 4.57 0.97
24 18 5.12 0.82 5.07 0.86 5.02 0.90 4.99 0.95 4.95 0.99
¢Model: ASBG24KMBA
AFR m3/h 1,040
Indoor temperature
16 18 20 22 24
Outdoor temperature
°CDB °CWB TC IP TC IP TC IP TC IP TC IP
kW kW kW kW kW
-15 -16 5.59 2.64 5.44 2.69 5.29 2.74 5.15 2.80 5.00 2.85
-10 -11 6.15 2.70 5.99 2.76 5.83 2.80 5.66 2.87 5.51 2.93
-5 -7 6.72 2.79 6.54 2.85 6.36 2.86 6.19 2.97 6.01 3.02
0 -2 7.28 2.84 7.09 2.91 6.90 2.93 6.71 3.02 6.52 3.08
5 3 7.84 2.87 7.64 2.93 7.43 2.99 7.23 3.05 7.02 3.10
7 6 8.44 3.03 8.22 3.10 8.00 3.16 7.78 3.19 7.56 3.19
10 8 8.50 2.86 8.28 2.92 8.06 3.02 7.84 3.03 7.62 3.10
15 10 8.15 2.42 7.94 2.47 7.72 2.61 7.51 2.57 7.29 2.62
20 15 8.35 2.18 8.14 2.22 7.91 2.31 7.69 2.31 7.48 2.31
24 18 8.46 2.14 8.24 2.18 8.01 2.23 7.79 2.27 7.57 2.31
- 7 -
4-2. Heating capacity 4. Capacity table
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

5. Fan performance
5-1. Air velocity distributions
¢Model: ASBG18KMBA
Measuring conditions Fan speed Operation mode
HIGH FAN
Top view
Horizontal louver: Up
Vertical louver: Center
Unit: m/s
(m)
2
3
1
0
1
2
3(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
2.0 1.5 1.0
0.5
Top view
Horizontal louver: Up
Vertical louver: Left & Right
Unit: m/s
(m)
2
3
1
0
1
2
3(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
0.5
2.0 1.5 1.0
Side view
Horizontal louver: Up
Vertical louver: Center
Unit: m/s
(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
(m)
2
3
1
0
2.0
0.5
1.5 1.0
Side view
Horizontal louver: Down
Vertical louver: Center
Unit: m/s
(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
(m)
2
3
1
0
2.0
1.5 1.0 0.5
- 8 -
5-1. Air velocity distributions 5. Fan performance
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

¢Model: ASBG24KMBA
Measuring conditions Fan speed Operation mode
HIGH FAN
Top view
Horizontal louver: Up
Vertical louver: Center
Unit: m/s
(m)
2
3
1
0
1
2
3
(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
2.0 1.5 1.0
0.5
Top view
Horizontal louver: Up
Vertical louver: Left & Right
Unit: m/s
(m)
2
3
1
0
1
2
3
(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
2.0 1.5
1.0 0.5
Side view
Horizontal louver: Up
Vertical louver: Center
Unit: m/s
(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
(m)
2
3
1
0
2.0
1.5 0.5
1.0
Side view
Horizontal louver: Down
Vertical louver: Center
Unit: m/s
(m)
0 1 2 3 4 5 6 7 8 9 10 11 12
(m)
2
3
1
0
2.0
1.5 1.0 0.5
- 9 -
5-1. Air velocity distributions 5. Fan performance
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

5-2. Airflow
¢Model: ASBG18KMBA
Cooling
Fan speed Airflow
HIGH
m3/h 880
l/s 244
CFM 518
MED
m3/h 740
l/s 206
CFM 436
LOW
m3/h 620
l/s 172
CFM 365
QUIET
m3/h 480
l/s 133
CFM 283
Heating
Fan speed Airflow
HIGH
m3/h 880
l/s 244
CFM 518
MED
m3/h 740
l/s 206
CFM 436
LOW
m3/h 620
l/s 172
CFM 365
QUIET
m3/h 480
l/s 133
CFM 283
- 10 -
5-2. Airflow 5. Fan performance
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

¢Model: ASBG24KMBA
Cooling
Fan speed Airflow
HIGH
m3/h 1,040
l/s 289
CFM 612
MED
m3/h 900
l/s 250
CFM 530
LOW
m3/h 740
l/s 206
CFM 436
QUIET
m3/h 580
l/s 161
CFM 341
Heating
Fan speed Airflow
HIGH
m3/h 1,040
l/s 289
CFM 612
MED
m3/h 900
l/s 250
CFM 530
LOW
m3/h 740
l/s 206
CFM 436
QUIET
m3/h 580
l/s 161
CFM 341
- 11 -
5-2. Airflow 5. Fan performance
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

6. Operation noise (sound pressure)
6-1. Noise level curve
¢Model: ASBG18KMBA
Cooling
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
Octave band sound pressure level, dB: (0 dB = 0.0002 μbar)
Octave band center frequency, Hz
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
HIGH
QUIET
Heating
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
Octave band sound pressure level, dB: (0 dB = 0.0002 μbar)
Octave band center frequency, Hz
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
HIGH
QUIET
¢Model: ASBG24KMBA
Cooling
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
Octave band sound pressure level, dB: (0 dB = 0.0002 μbar)
Octave band center frequency, Hz
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
HIGH
QUIET
Heating
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
Octave band sound pressure level, dB: (0 dB = 0.0002 μbar)
Octave band center frequency, Hz
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
HIGH
QUIET
- 12 -
6-1. Noise level curve 6. Operation noise (sound pressure)
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

6-2. Sound level check point
0.8 m
1 m
Microphone Microphone
NOTE: Detailed shape of the actual indoor unit might be slightly different from the one illustrated
above.
- 13 -
6-2. Sound level check point 6. Operation noise (sound pressure)
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

7. Safety devices
Type of
protection Protection form Model
ASBG18KMBA ASBG24KMBA
Circuit protection Current fuse (PCB*) 250 V, 3.15 A
Terminal
protection Current (thermal) fuse 250 V, 3.1 A
Fan motor
protection
Thermal protector
program
Activate 150 ±15°C
Fan motor stop
Reset 120 ±15°C
Fan motor restart
*PCB: Printed Circuit Board
- 14 - 7. Safety devices
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

8. External input and output
With using external input and output functions, this product can be operated inter-connectedly with
an external device.
Connector Input Output Remarks
CN14 Control input — See external input/output
settings for details.
CN16 — Operation status output
8-1. External input
With using external input function, some functions on this product can be controlled from an external
device.
• “Operation/Stop” mode or "Forced stop" mode can be selected with function setting of indoor unit.
• A twisted pair cable should be used. Maximum length of cable is 150 m.
• Use an external input and output cable with appropriate external dimension, depending on the
number of cables to be installed.
• The wire connection should be separate from the power cable line.
¢Control input (Operation/Stop)
The air conditioner can be remotely operated by means of the following on-site work.
Unit operation is started at the following contents by adding the contact input of a commercially avail-
able on/off switch to a connector on the external control PCB and turning it on.
Unit operation Initial setting after power is on Starting mode other than initial setting
Operation mode Auto changeover Mode at previous operation
Set temperature 24 °C Temperature at previous operation
Airflow mode AUTO Mode at previous operation
Air direction (swing) Standard air direction (swing OFF) Air direction at previous operation
- 15 -
8-1. External input 8. External input and output
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA

Circuit diagram example
Indoor unit
control PCB
Example: Switch
Locally purchased
Connected unit
1
3
Signal
*10 m
Connector
• Contact capacity: DC 24 V or more, 10 mA or
more
• *: Make the distance from the PCB to the con-
nected unit within 10 m.
• Use non-polar relays and switches.
• When function setting is “Operation/Stop” mode
Operation
Stop
On
Off
Input signal
Indoor unit
Optional part
Part name Model name Exterior
External Connect Kit UTY-XWZX
External input wire
- 16 -
8-1. External input 8. External input and output
WALL MOUNTED ASBG18-24KMBA WALL MOUNTED ASBG18-24KMBA