Fujitsu ARXG54KHTA Service manual

AIR CONDITIONER
Duct type
DESIGN & TECHNICAL MANUAL
INDOOR
ARXG45KHTA
ARXG54KHTA
OUTDOOR
AOYG45KBTB
AOYG54KBTB
DR_AR029EF_01
2019.04.22

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 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................3
2-1. Models: ARXG45KHTA and ARXG54KHTA ....................................................................3
2-2. Installation space requirement .........................................................................................4
2-3. Maintenance space requirement......................................................................................5
3. Wiring diagrams ............................................................................................6
3-1. Models: ARXG45KHTA and ARXG54KHTA ....................................................................6
4. Capacity table................................................................................................7
4-1. Cooling capacity...............................................................................................................7
4-2. Heating capacity ..............................................................................................................8
5. Fan performance ...........................................................................................9
5-1. Fan performance curve....................................................................................................9
5-2. Airflow ............................................................................................................................13
6. Operation noise (sound pressure).............................................................15
6-1. Noise level curve............................................................................................................15
6-2. Sound level check point .................................................................................................16
7. Safety devices .............................................................................................17
8. External input and output...........................................................................18
8-1. Preparation ....................................................................................................................18
8-2. External input.................................................................................................................19
8-3. External output...............................................................................................................20
9. Function settings ........................................................................................24
9-1. Models: ARXG45KHTA and ARXG54KHTA ..................................................................24
9-2. Function settings by using remote controller..................................................................26
10. Accessories.................................................................................................29
10-1.Models: ARXG45KHTA and ARXG54KHTA .................................................................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. Models: AOYG45KBTB and AOYG54KBTB ..................................................................35
3. Installation space ........................................................................................36
3-1. Models: AOYG45KBTB and AOYG54KBTB ..................................................................36
4. Refrigerant circuit .......................................................................................39
4-1. Models: AOYG45KBTB and AOYG54KBTB ..................................................................39
5. Wiring diagrams ..........................................................................................40
5-1. Models: AOYG45KBTB and AOYG54KBTB ..................................................................40
6. Capacity compensation rate for pipe length and height difference........41
6-1. Models: AOYG45KBTB and AOYG54KBTB ..................................................................41
7. Additional charge calculation ....................................................................42
7-1. Models: AOYG45KBTB and AOYG54KBTB ..................................................................42
8. Airflow..........................................................................................................43
8-1. Models: AOYG45KBTB and AOYG54KBTB ..................................................................43
9. Operation noise (sound pressure).............................................................44
9-1. Noise level curve............................................................................................................44
9-2. Sound level check point .................................................................................................45
10. Electrical characteristics............................................................................46
11. Safety devices .............................................................................................47
12. External input and output ..........................................................................48
12-1.External input................................................................................................................48
12-2.External output..............................................................................................................50
13. Function settings .......................................................................................52
13-1.Control PCB and switch buttons location ......................................................................52
13-2.Local setting procedure.................................................................................................54
14. Accessories.................................................................................................56
14-1.Models: AOYG45KBTB and AOYG54KBTB .................................................................56
15. Optional parts..............................................................................................57
CONTENTS (continued)

Part 1. INDOOR UNIT
DUCT TYPE:
ARXG45KHTA
ARXG54KHTA

1. Specifications
Type
Duct
Inverter heat pump
Model name ARXG45KHTA ARXG54KHTA
Power supply 230 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 198—264 V
Capacity
Cooling
Rated kW 12.1 13.4
Btu/h 41,300 45,700
Min.—Max. kW 4.0—14.0 5.0—14.5
Btu/h 13,600—47,800 17,100—49,500
Heating
Rated kW 13.5 15.5
Btu/h 46,100 52,900
Min.—Max. kW 5.0—16.2 5.5—18.0
Btu/h 17,100—55,300 18,800—61,400
Input power
Cooling Rated
kW
4.16 4.77
Max. 4.77 4.98
Heating Rated 3.61 4.18
Max. 4.88 5.25
Current Cooling Rated A18.2 20.9
Heating Rated 15.8 18.3
Power factor Cooling %99.2 99.3
Heating 99.2 99.3
EER Cooling kW/kW 2.91 2.81
COP Heating 3.74 3.71
Moisture removal L/h (pints/h) 1.5 (2.6) 2.0 (3.5)
Maximum operating current*1Cooling A28.5
Heating 28.5
Fan
Airflow rate
Cooling
HIGH
m3/h
3,350
MED 2,850
LOW 2,430
Heating
HIGH 3,350
MED 2,850
LOW 2,430
Type × Q'ty Sirocco fan × 2
Motor output W 490
Static pressure range Pa 100 to 250
Sound pressure level*2
Cooling
HIGH
dB (A)
47
MED 43
LOW 40
Heating
HIGH 47
MED 43
LOW 40
Heat exchanger type
Dimensions (H × W × D) mm 336 × 890 × 53.2
Fin pitch 1.3
Rows × Stages 4 × 16
Pipe type Copper
Fin type Aluminum
Enclosure Material Steel sheet
Color ―
Dimensions
(H × W × D)
Net mm 400 × 1,050 × 500
Gross 460 × 1,230 × 640
Weight Net kg 46
Gross 51
Connection pipe Size Liquid mm (in) Ø9.52 (3/8) Gas Ø15.88 (5/8)
Method Flare
Operation range Cooling °C 18 to 32 %RH 80 or less
Heating °C 16 to 30
Drain port Material Steel
Size mm Ø23.4 (I.D.), Ø25.4 (O.D.)
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.
– Pipe length: 5 m, Height difference: 0 m. (Between outdoor unit and indoor unit.)
– Standard static pressure: 100 Pa
• 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 ARXG45, 54KHTA DUCT TYPE ARXG45, 54KHTA

2. Dimensions
2-1. Models: ARXG45KHTA and ARXG54KHTA
Unit: mm
Front view
Top view
Side view (L)
Side view (R)
Rear view
P5 ×120 = 600
585
85
P120 ×2 = 240
108
208356
371
1,080
1,000
862
126
1,050
851 125
295 26
28
155 14
324
400
123 41
500
139
12-Φ3
Drain
port
71
88
- 3 -
2-1. Models: ARXG45KHTA and ARXG54KHTA 2. Dimensions
DUCT TYPE ARXG45, 54KHTA DUCT TYPE ARXG45, 54KHTA

2-2. Installation space requirement
Provide sufficient installation space for product safety.
¢Models: ARXG45KHTA and ARXG54KHTA
Installation by which service space is mode on top of the unit (recommended).
350 or
more
450 or more
(Service space)
Service access
Unit: mm
Installation by which service space is carried out from the bottom of the unit.
20 or
more
450 or more
(Service space)
Service access
Unit: mm
- 4 -
2-2. Installation space requirement 2. Dimensions
DUCT TYPE ARXG45, 54KHTA DUCT TYPE ARXG45, 54KHTA

2-3. Maintenance space requirement
For future maintenance and service access, provide sufficient maintenance space.
NOTE: Do not place any wiring or illumination in the maintenance space, as they will impede ser-
vice.
¢Models: ARXG45KHTA and ARXG54KHTA
:Service access :Service space
Unit
AIR
AIR
Control box
500 or more30 or more
500 or more
450 or more
300 or more 300
or more
Unit: mm
- 5 -
2-3. Maintenance space requirement 2. Dimensions
DUCT TYPE ARXG45, 54KHTA DUCT TYPE ARXG45, 54KHTA

3. Wiring diagrams
3-1. Models: ARXG45KHTA and ARXG54KHTA
- 6 -
3-1. Models: ARXG45KHTA and ARXG54KHTA 3. Wiring diagrams
DUCT TYPE ARXG45, 54KHTA DUCT TYPE ARXG45, 54KHTA