Fujitsu AOHG22KBTB Service manual

AIR CONDITIONER
Duct type
DESIGN & TECHNICAL MANUAL
INDOOR
ARXG22KMLA
ARXG22KMLB
OUTDOOR
AOHG22KBTB
DR_AR030EG_04
2021.04.07

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 Inc.
App Store® is a service mark of Apple Inc., registered in the U.S. and other countries.
Copyright © 2019, 2021 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................4
2-1. Model: ARXG22KMLA and ARXG22KMLB .....................................................................4
2-2. Installation space requirement .........................................................................................5
2-3. Maintenance space requirement......................................................................................6
3. Wiring diagrams ............................................................................................7
3-1. Model: ARXG22KMLA and ARXG22KMLB .....................................................................7
4. Capacity table................................................................................................8
4-1. Cooling capacity...............................................................................................................8
4-2. Heating capacity ..............................................................................................................8
5. Fan performance ...........................................................................................9
5-1. Fan performance curve....................................................................................................9
6. Operation noise (sound pressure).............................................................14
6-1. Noise level curve............................................................................................................14
6-2. Sound level check point .................................................................................................14
7. Safety devices .............................................................................................15
8. External input and output...........................................................................16
8-1. External input.................................................................................................................16
8-2. External output...............................................................................................................17
8-3. Combination of external input and output.......................................................................18
8-4. Details of function ..........................................................................................................19
9. Function settings .......................................................................................22
9-1. Function settings on indoor unit .....................................................................................22
9-2. Function settings by using remote controller..................................................................24
10. Accessories.................................................................................................29
10-1.Model: ARXG22KMLA and ARXG22KMLB ..................................................................29
11. Optional parts .............................................................................................30
11-1.Controllers ....................................................................................................................30
11-2.Others ...........................................................................................................................31

Part 2. OUTDOOR UNIT.....................................................................33
1. Specifications..............................................................................................34
2. Dimensions..................................................................................................35
2-1. Model: AOHG22KBTB ...................................................................................................35
3. Installation space ........................................................................................36
3-1. Model: AOHG22KBTB ...................................................................................................36
4. Refrigerant circuit .......................................................................................39
4-1. Model: AOHG22KBTB ...................................................................................................39
5. Wiring diagrams ..........................................................................................40
5-1. Model: AOHG22KBTB ...................................................................................................40
6. Capacity compensation rate for pipe length and height difference........41
6-1. Model: AOHG22KBTB ...................................................................................................41
7. Additional charge calculation ....................................................................42
7-1. Model: AOHG22KBTB ...................................................................................................42
8. Airflow..........................................................................................................43
8-1. Model: AOHG22KBTB ...................................................................................................43
9. Operation noise (sound pressure).............................................................44
9-1. Noise level curve............................................................................................................44
9-2. Sound level check point .................................................................................................44
10. Electrical characteristics............................................................................45
11. Safety devices .............................................................................................46
12. Accessories.................................................................................................47
12-1.Model: AOHG22KBTB ..................................................................................................47
CONTENTS (continued)

Part 1. INDOOR UNIT
DUCT TYPE:
ARXG22KMLA
ARXG22KMLB

1. Specifications
Type
Duct
Inverter heat pump
Model name ARXG22KMLA
ARXG22KMLB
Power supply 230 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 198—264 V
Capacity
Cooling
Rated kW 6.0
Btu/h 20,500
Min.—Max. kW 0.9—6.7
Btu/h 3,100—22,900
Heating
Rated kW 7.00
Btu/h 23,900
Min.—Max. kW 0.90—8.00
Btu/h 3,100—27,300
Input power
Cooling Rated
kW
1.78
Max. 2.90
Heating Rated 1.87
Max. 2.90
Current Cooling Rated A 7.8
Heating 8.2
Power factor Cooling %99.2
Heating 99.2
EER Cooling kW/kW 3.37
COP Heating 3.74
Moisture removal L/h (pints/h) 2.1 (3.7)
Maximum operating current *1 Cooling A12.6
Heating 12.6
Fan
Airflow rate
Cooling
HIGH
m3/h
1,100
MED 910
LOW 750
QUIET 580
Heating
HIGH 1,100
MED 910
LOW 750
QUIET 580
Type × Q'ty Sirocco fan × 2
Motor output W 106
Recommended static pressure range Pa 30 to 150
Sound pressure level *2
Cooling
HIGH
dB (A)
31
MED 29
LOW 27
QUIET 25
Heating
HIGH 31
MED 29
LOW 27
QUIET 25
Heat exchanger type
Dimensions (H × W × D) mm 294 × 1,000 × 39.9
Fin pitch 1.40
Rows × Stages 3 × 14
Pipe type Copper tube
Fin type Aluminum
Enclosure Material Steel sheet
Color —
Dimensions
(H × W × D)
Net mm 270 × 1,135 × 700
Gross 300 × 1,320 × 790
Weight Net kg 35
Gross 43
Connection pipe Size Liquid mm (in) Ø 6.35 (Ø 1/4)
Gas Ø 12.70 (Ø 1/2)
Method Flare
Drain port Material Steel
Size mm Ø 35.7 (I.D.), Ø 38.1 (O.D.)
Operation range Cooling °C 18 to 32
%RH 80 or less
Heating °C 16 to 30
Remote control (Option) Wired remote controller, Wireless remote controller, 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.
– Standard static pressure: 35 Pa.
– 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 operating current is the total current of the indoor unit and the outdoor unit.
• *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
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

Specifications for ErP Lot10
Model name ARXG22KMLA
ARXG22KMLB
Energy efficiency class Cooling A++
Heating (Average) A+
Pdesign Cooling kW 6.00 (35°C)
Heating (Average) 4.80 (-10°C)
SEER Cooling kWh/kWh 6.10
SCOP Heating (Average) 4.10
Annual energy consumption QCE kWh/a 344
QHE (Average) 1,637
Sound power level Cooling HIGH dB (A) 60
Heating 62
- 3 - 1. Specifications
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

2. Dimensions
2-1. Model: ARXG22KMLA and ARXG22KMLB
Front view
Top viewSide view (L) Side view (R)
Rear view
Gas pipe
Liquid pipe
Drain port
Drain port
Knockout
for fresh air
Unit: mm
138
138
P125 × 3 = 375
Φ3.2
8080
Φ205
75
82
8080
264
Φ3.2
264264
270
240
121
80 80
32
161
80 80
Φ200
40 700
173 477
73
107
1,135
1,015
120
1,177
Φ5 P125 × 3 = 375
Φ5
16
34
270
240
170
32
66
114
281
240
168
283
39
54
Air
- 4 -
2-1. Model: ARXG22KMLA and ARXG22KMLB 2. Dimensions
DUCT TYPE ARXG22KML DUCT TYPE
ARXG22KML

2-2. Installation space requirement
Provide sufficient installation space for product safety.
NOTE: The detailed component shape depends on the model.
¢Model: ARXG22KMLA and ARXG22KMLB
Unit: mm
300 or more 150 or more
20 or more
- 5 -
2-2. Installation space requirement 2. Dimensions
DUCT TYPE ARXG22KML DUCT TYPE
ARXG22KML

2-3. Maintenance space requirement
For future maintenance and service access, provide sufficient maintenance space.
NOTES:
• Do not place any wiring or illumination in the maintenance space, as they will impede service.
• The detailed component shape depends on the model.
¢Model: ARXG22KMLA and ARXG22KMLB
Unit: mm
• Provide a service access for maintenance purposes.
Maintenance hole
Control box
300
500
500
100
• The service access necessary for fan units and filter maintenance.
Maintenance hole
Intake panel
300
1,550
500
100
Control box
• When using a square duct
P174 ×6 = 1,044 Φ3.2
46
23
18
219
109
• Bottom air intake hole
108 1,015
16 240
- 6 -
2-3. Maintenance space requirement 2. Dimensions
DUCT TYPE ARXG22KML DUCT TYPE
ARXG22KML

3. Wiring diagrams
3-1. Model: ARXG22KMLA and ARXG22KMLB
- 7 -
3-1. Model: ARXG22KMLA and ARXG22KMLB 3. Wiring diagrams
DUCT TYPE ARXG22KML DUCT TYPE
ARXG22KML

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: ARXG22KMLA and ARXG22KMLB
AFR m3/h 1,100
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
-15 4.99 3.92 0.57 5.56 3.94 0.58 5.75 4.28 0.58 6.13 4.30 0.59 6.32 4.64 0.59 6.70 4.62 0.60 7.08 4.92 0.60
-10 5.03 3.92 0.48 5.61 3.95 0.49 5.80 4.29 0.49 6.18 4.31 0.50 6.37 4.65 0.50 6.75 4.63 0.51 7.13 4.93 0.51
0 4.91 3.87 0.49 5.46 3.89 0.50 5.65 4.23 0.50 6.02 4.24 0.51 6.21 4.58 0.51 6.58 4.56 0.52 6.96 4.86 0.52
5 4.77 3.81 0.63 5.32 3.84 0.64 5.50 4.17 0.64 5.86 4.19 0.65 6.04 4.52 0.65 6.40 4.50 0.66 6.76 4.80 0.66
10 4.74 3.81 0.61 5.28 3.83 0.62 5.46 4.16 0.62 5.82 4.18 0.63 6.00 4.51 0.63 6.36 4.49 0.64 6.72 4.79 0.64
15 4.59 3.74 0.73 5.11 3.76 0.74 5.29 4.09 0.75 5.64 4.10 0.76 5.81 4.43 0.76 6.16 4.41 0.77 6.51 4.70 0.78
20 5.77 4.27 1.30 6.43 4.30 1.32 6.65 4.67 1.33 7.09 4.69 1.34 7.31 5.06 1.35 7.75 5.04 1.36 8.19 5.37 1.38
25 5.43 4.14 1.45 6.05 4.16 1.47 6.25 4.52 1.48 6.66 4.54 1.49 6.87 4.90 1.50 7.28 4.88 1.52 7.69 5.20 1.53
30 5.08 3.99 1.58 5.66 4.02 1.61 5.85 4.37 1.62 6.24 4.38 1.63 6.43 4.73 1.64 6.82 4.71 1.66 7.20 5.02 1.67
35 4.74 3.86 1.72 5.28 3.88 1.74 5.46 4.22 1.75 5.82 4.23 1.77 6.00 4.57 1.78 6.36 4.55 1.80 6.72 4.85 1.82
40 4.50 3.74 1.86 5.01 3.76 1.89 5.18 4.09 1.90 5.52 4.10 1.92 5.69 4.43 1.93 6.03 4.41 1.95 6.37 4.70 1.97
46 3.69 3.31 1.60 4.11 3.33 1.63 4.25 3.62 1.64 4.53 3.63 1.65 4.67 3.92 1.66 4.95 3.90 1.68 5.23 4.16 1.69
4-2. Heating capacity
NOTE: Values mentioned in the table are calculated based on the maximum capacity.
¢Model: ARXG22KMLA and ARXG22KMLB
AFR m3/h 1,100
Indoor temperature
°CDB 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 5.60 2.16 5.46 2.21 5.33 2.25 5.20 2.30 5.06 2.34
-10 -11 6.14 2.25 6.00 2.29 5.85 2.34 5.70 2.39 5.56 2.43
-5 -7 6.70 2.32 6.54 2.37 6.38 2.42 6.22 2.47 6.06 2.52
0 -2 7.26 2.40 7.08 2.45 6.91 2.50 6.74 2.55 6.56 2.60
5 3 7.81 2.48 7.63 2.53 7.44 2.58 7.25 2.63 7.07 2.68
7 6 8.40 2.48 8.20 2.53 8.00 2.58 7.80 2.63 7.60 2.68
10 8 8.05 2.34 7.86 2.39 7.67 2.44 7.48 2.49 7.29 2.54
15 10 7.49 2.11 7.31 2.16 7.13 2.20 6.95 2.24 6.77 2.28
20 15 7.04 1.80 6.87 1.83 6.70 1.87 6.53 1.91 6.37 1.94
24 18 7.32 1.78 7.14 1.81 6.97 1.85 6.80 1.89 6.62 1.92
- 8 -
4-1. Cooling capacity 4. Capacity table
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

5. Fan performance
NOTE: Airflow and capacity curve is measured based on the same condition mentioned in "Specifi-
cations".
5-1. Fan performance curve
¢Model: ARXG22KMLA and ARXG22KMLB (Normal mode)
Fan speed Item
Static pressure (Pa)
6 8 11 14 18 21 25 30 35 40
HIGH
m3/h — — — — — — — 1200 1100 1000
l/s — — — — — — — 333 306 278
CFM — — — — — — — 706 647 589
MED
m3/h — — — — — 980 910 830 — —
l/s — — — — — 272 253 231 — —
CFM — — — — — 577 536 489 — —
LOW
m3/h — — — 825 750 690 — — — —
l/s — — — 229 208 192 — — — —
CFM — — — 486 441 406 — — — —
QUIET
m3/h 630 580 525 — — — — — — —
l/s 175 161 146 — — — — — — —
CFM 371 341 309 — — — — — — —
Q-h Characteristic curve
STATIC PRESSURE(Pa)
50
40
30
20
10
0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
COOLING
Cooling capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
- 9 -
5-1. Fan performance curve 5. Fan performance
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

HEATING
Heating capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
- 10 -
5-1. Fan performance curve 5. Fan performance
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

¢Model: ARXG22KMLA and ARXG22KMLB (Static pressure mode
1)
Fan speed Item
Static pressure (Pa)
20 23 30 35 40 47 55 65
HIGH
m3/h — — — — — — 1200 1000
l/s — — — — — — 333 278
CFM — — — — — — 706 589
MED
m3/h — — — — 1000 815 — —
l/s — — — — 278 226 — —
CFM — — — — 589 480 — —
LOW
m3/h — — 830 680 — — — —
l/s — — 231 189 — — — —
CFM — — 489 400 — — — —
QUIET
m3/h 650 540 — — — — — —
l/s 181 150 — — — — — —
CFM 383 318 — — — — — —
Q-h Characteristic curve
STATIC PRESSURE(Pa)
70
60
50
40
30
20
10
0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
COOLING
Cooling capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
HEATING
Heating capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
- 11 -
5-1. Fan performance curve 5. Fan performance
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

¢Model: ARXG22KMLA and ARXG22KMLB (Static pressure mode
2)
Fan speed Item
Static pressure (Pa)
35 37 50 55 68 75 93 100
HIGH
m3/h — — — — — — 1160 930
l/s — — — — — — 322 258
CFM — — — — — — 683 547
MED
m3/h — — — — 1020 800 — —
l/s — — — — 283 222 — —
CFM — — — — 600 471 — —
LOW
m3/h — — 835 670 — — — —
l/s — — 232 186 — — — —
CFM — — 491 394 — — — —
QUIET
m3/h 660 530 — — — — — —
l/s 183 147 — — — — — —
CFM 388 312 — — — — — —
Q-h Characteristic curve
STATIC PRESSURE(Pa)
110
100
90
80
70
60
50
40
30
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
COOLING
Cooling capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
HEATING
Heating capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
- 12 -
5-1. Fan performance curve 5. Fan performance
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

¢Model: ARXG22KMLA and ARXG22KMLB (Static pressure mode
3)
Fan speed Item
Static pressure (Pa)
55 58 85 90 115 122 142 150
HIGH
m3/h — — — — — — 1100 880
l/s — — — — — — 306 244
CFM — — — — — — 647 518
MED
m3/h — — — — 1000 810 — —
l/s — — — — 278 225 — —
CFM — — — — 589 477 — —
LOW
m3/h — — 840 680 — — — —
l/s — — 233 189 — — — —
CFM — — 494 400 — — — —
QUIET
m3/h 660 525 — — — — — —
l/s 183 146 — — — — — —
CFM 388 309 — — — — — —
Q-h Characteristic curve
STATIC PRESSURE(Pa)
150
140
130
120
110
100
90
80
70
60
50
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
COOLING
Cooling capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
HEATING
Heating capacity(%)
104.0
102.0
100.0
98.0
96.0
94.0
92.0
500 600 700 800 900 1,000 1,100 1,200 1,300
Airflow (m3/h)
Capacity
- 13 -
5-1. Fan performance curve 5. Fan performance
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

6. Operation noise (sound pressure)
6-1. Noise level curve
¢Model: ARXG22KMLA and ARXG22KMLB
Cooling
Octave band sound pressure level, dB: (0 dB=0.0002 µbar)
Octave band center frequency, Hz
80
70
60
50
40
30
20
10
0
63 125 250 500 1,000 2,000 4,000 8,000
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
Octave band sound pressure level, dB: (0 dB=0.0002 µbar)
Octave band center frequency, Hz
80
70
60
50
40
30
20
10
0
63 125 250 500 1,000 2,000 4,000 8,000
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
HIGH
QUIET
6-2. Sound level check point
Front view
Microphone
Side view
Product
Air
1.5 m
2 m 1 m
Microphone
Measuring duct
(Set the static pressure
as rating in this area.)
Measuring duct
- 14 -
6-1. Noise level curve 6. Operation noise (sound pressure)
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

7. Safety devices
Protection form
Model
ARXG22KMLA
ARXG22KMLB
Circuit protection Current fuse (PCB*) 250 V, 5 A
Fan motor protection Thermal protection program
Activate 135 ±15 °C
Fan motor stop
Reset 115 ±15 °C
Fan motor restart
Current protection 1.10—1.42 A
*: Printed Circuit Board
- 15 - 7. Safety devices
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML

8. External input and output
CN47 (Ext. out)
Terminal (Ext. in)
Indoor unit PCB
External input and output Connector Input select Input
signal
External
connect kit
(Optional
parts)
External input Operation/Stop
Forced stop Terminal Dry contact Edge —
External output
Operation status
CN47 — — UTY-XWZXZG
Error status
Indoor unit fan operation status
External heater output
8-1. External input
• “Operation/Stop” mode or "Forced stop" mode can be selected with function setting of indoor unit.
• A twisted pair cable (22AWG) should be used. Maximum length of cable is 150 m.
• The wire connection should be separate from the power cable line.
Indoor unit functions such as Operation/Stop can be done by using indoor unit terminals.
1
2
Terminal
*1: The switch can be used on the following condition: DC 12 V to 24 V, 1 mA to 15 mA.
- 16 -
8-1. External input 8. External input and output
DUCT TYPE ARXG22KML DUCT TYPE ARXG22KML