Fujitsu ARU18RGLX Service manual

AIR CONDITIONER
Duct type
DESIGN & TECHNICAL MANUAL
INDOOR
ARU18RGLX
ARU24RGLX
ARU30RGLX
ARU36RGLX
OUTDOOR
AOU18RGLX
AOU24RGLX
AOU30RGLX
AOU36RGLX
DR_AR025EF_10
2022.12.07

Notices:
• Product specifications and design are subject to change without notice for future improvement.
• For further details, please check with our authorized dealer.
Copyright © 2019, 2022 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................6
2-1. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX.................................................6
2-2. Model: ARU36RGLX........................................................................................................7
2-3. Installation space requirement .........................................................................................8
2-4. Maintenance space requirement......................................................................................9
3. Wiring diagrams ..........................................................................................10
3-1. Models: ARU18RGLX and ARU24RGLX.......................................................................10
3-2. Models: ARU30RGLX and ARU36RGLX.......................................................................11
4. Capacity table..............................................................................................12
4-1. Cooling capacity.............................................................................................................12
4-2. Heating capacity ............................................................................................................16
5. Fan performance .........................................................................................19
5-1. Fan performance curve..................................................................................................19
5-2. Airflow ............................................................................................................................28
6. Operation noise (sound pressure).............................................................32
6-1. Noise level curve............................................................................................................32
6-2. Sound level check point .................................................................................................34
7. Safety devices .............................................................................................35
8. External input and output...........................................................................36
8-1. External input.................................................................................................................36
8-2. External output...............................................................................................................38
8-3. Combination of external input and output.......................................................................39
8-4. Details of function ..........................................................................................................42
9. Function settings .......................................................................................67
9-1. Function settings on indoor unit .....................................................................................67
9-2. Function settings by using remote controller..................................................................69
10. Accessories.................................................................................................78
11. Optional parts .............................................................................................79
11-1.Controllers ....................................................................................................................79
11-2.Others ...........................................................................................................................80

Part 2. OUTDOOR UNIT.....................................................................83
1. Specifications..............................................................................................84
2. Dimensions..................................................................................................85
2-1. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.......................85
3. Installation space ........................................................................................86
3-1. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.......................86
4. Refrigerant circuit .......................................................................................90
4-1. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.......................90
5. Wiring diagrams ..........................................................................................91
5-1. Model: AOU18RGLX......................................................................................................91
5-2. Models: AOU24RGLX, AOU30RGLX, and AOU36RGLX ..............................................92
6. Capacity compensation rate for pipe length and height difference........93
6-1. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.......................93
7. Additional charge calculation ....................................................................94
7-1. Model: AOU18RGLX......................................................................................................94
7-2. Models: AOU24RGLX, AOU30RGLX, and AOU36RGLX ..............................................94
8. Airflow..........................................................................................................95
8-1. Model: AOU18RGLX......................................................................................................95
8-2. Model: AOU24RGLX......................................................................................................95
8-3. Model: AOU30RGLX......................................................................................................95
8-4. Model: AOU36RGLX......................................................................................................96
9. Operation noise (sound pressure).............................................................97
9-1. Noise level curve............................................................................................................97
9-2. Sound level check point .................................................................................................99
10. Electrical characteristics..........................................................................100
11. Safety devices ...........................................................................................101
12. Accessories...............................................................................................102
12-1.Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX....................102
CONTENTS (continued)

Part 1. INDOOR UNIT
DUCT TYPE:
ARU18RGLX
ARU24RGLX
ARU30RGLX
ARU36RGLX

1. Specifications
Type
Duct
Inverter, Heat pump
Model name ARU18RGLX ARU24RGLX ARU30RGLX
Power supply 208/230 V~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Cooling
Rated kW 5.28 7.03 8.79
Btu/h 18,000 24,000 30,000
Min.—Max. kW 1.58—6.30 1.58—8.50 2.81—10.26
Btu/h 5,400—21,500 5,400—29,000 9,600—35,000
Heating
47°FDB
(Outdoor temp.)
Rated kW 6.15 7.91 9.38
Btu/h 21,000 27,000 32,000
Min.—Max. kW 1.58—7.50 1.58—9.50 2.70—11.43
Btu/h 5,400—25,600 5,400—32,400 9,200—39,000
17°FDB
(Outdoor temp.)*1
Rated kW 3.72 5.07 5.74
Btu/h 12,700 17,300 19,600
Max. kW 5.81 7.29 8.83
Btu/h 19,800 24,800 30,100
5°FDB
(Outdoor temp.)*2Rated kW 5.25 6.51 7.62
Btu/h 17,900 22,200 26,000
Input power
Cooling Rated
kW
1.51 2.05 3.00
Min.—Max. 0.53—2.08 0.63—2.82 0.70—3.43
Heating
47°FDB
(Outdoor temp.)
Rated 1.65 2.13 2.58
Min.—Max. 0.51—2.19 0.54—2.96 0.62—3.27
17°FDB
(Outdoor temp.)*1
Rated 1.32 1.79 2.13
Max. 2.17 3.39 3.33
5°FDB
(Outdoor temp.)*2Rated 2.38 3.35 3.50
Fan
HIGH
W
53 84 139
MED 30 44 79
LOW 22 27 58
QUIET 15 46
Current Cooling Rated A 6.8 9.1 13.1
Heating 7.3 9.3 11.4
EER2 Cooling kW/kW 3.50 3.43 2.94
Btu/hW 11.9 11.7 10.0
COP2 Heating kW/kW 3.72 3.64
Btu/hW 12.9 12.4
SEER2 Cooling Btu/hW 16.7 16.0 15.6
HSPF2 Heating 9.3 9.5 9.1
Power factor Cooling %96.5 97.9 99.6
Heating 98.3 99.6 98.4
Moisture removal pints/h (L/h) 3.8 (1.8) 4.0 (1.9) 5.1 (2.4)
Maximum operating current*3Cooling A13.6 15.6
Heating 14.1 16.1
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
618 (1,050) 800 (1,360) 1,001(1,700)
MED 494 (840) 636 (1,080) 800 (1,360)
LOW 430 (730) 518 (880) 700 (1,190)
QUIET 371 (630) 400 (680) 630 (1,070)
Heating
HIGH 618 (1,050) 800 (1,360) 1,001(1,700)
MED 494 (840) 636 (1,080) 800 (1,360)
LOW 430 (730) 518 (880) 700 (1,190)
QUIET 371 (630) 400 (680) 630 (1,070)
Type × Qty Sirocco fan × 2
Motor output W 197 375
Static pressure range inWG (Pa) 0.12 to 0.80 (30 to 200)
Sound pressure level*4
Cooling
HIGH
dB (A)
31 35 38
MED 28 30 34
LOW 25 28 30
QUIET 24 29
Heating
HIGH 31 35 38
MED 28 30 34
LOW 25 28 30
QUIET 24 29
Heat exchanger type
Dimensions (H × W × D) in (mm) 16-9/16 × 29-13/16 × 1-9/16 (420 × 758 × 39.9)
Fin pitch FPI 18
Rows × Stages 3 × 20
Pipe type Copper
Fin type Aluminum
Hydrophilic coating
Enclosure Material Steel
Color ―
Dimensions
(H × W × D)
Net in (mm) 11-13/16 × 39-3/8 × 27-9/16 (300 × 1,000 × 700)
Gross 15-3/4 × 48-3/4 × 34-7/16 (400 × 1,238 × 875)
Weight Net lb (kg) 93 (42)
Gross 110 (50)
Connection pipe Size Liquid in (mm) Ø1/4 (Ø6.35) Ø3/8 (Ø9.52)
Gas Ø1/2 (Ø12.7) Ø5/8 (Ø15.88)
Method Flare
Drain hose Material PVC
Tip diameter in (mm) Ø13/16 (20.7) (I.D.), Ø1-1/16 (26.6) (O.D.)
Operation range Cooling °F (°C) 64.4 to 89.6 (18 to 32)
%RH 80 or less
Heating °F (°C) 60.8 to 86.0 (16 to 30)
- 2 - 1. Specifications
DUCT TYPE ARU18-36RGLX DUCT TYPE ARU18-36RGLX

Type
Duct
Inverter, Heat pump
Model name ARU18RGLX ARU24RGLX ARU30RGLX
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80°FDB/67°FWB (26.67°CDB/19.44°CWB), and outdoor temperature of 95°FDB/75°FWB (35°CDB/23.9°CWB).
– Heating: Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 47°FDB/43°FWB (8.33°CDB/6.11°CWB).
– *1: Heating (17°F): Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 17°FDB/15°FWB (-8.33°CDB/-9.44°CWB).
– *2: Heating (5°F): Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 5°FDB/4°FWB (-15.0°CDB/-15.56°CWB).
– Test conditions are based on AHRI 210/240 2023.
– Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
– Standard static pressure: 0.18 inWG (45 Pa): 18, and 24 model, 0.23 inWG (57 Pa): 30 model
• Protective function might work when using it outside the operation range.
• *3: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and outdoor unit.
• *4: 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.
M condition
Model name ARU18RGLX ARU24RGLX ARU30RGLX
Capacity
Cooling
Rated kW 5.28 7.03 8.79
Btu/h 18,000 24,000 30,000
Min.—Max. kW 1.58—6.30 1.58—8.50 2.81—10.26
Btu/h 5,400—21,500 5,400—29,000 9,600—35,000
Heating
47°FDB
(Outdoor temp.)
Rated kW 6.15 7.91 9.38
Btu/h 21,000 27,000 32,000
Min.—Max. kW 1.58—7.50 1.58—9.50 2.70—11.43
Btu/h 5,400—25,600 5,400—32,400 9,200—39,000
17°FDB
(Outdoor temp.)*
Rated kW 3.72 5.07 5.74
Btu/h 12,700 17,300 19,600
Max. kW 5.81 7.29 8.83
Btu/h 19,800 24,800 30,100
Input power
Cooling Rated
kW
1.38 1.90 2.83
Min.—Max. 0.53—2.08 0.63—2.82 0.70—3.43
Heating
47°FDB
(Outdoor temp.)
Rated 1.50 2.06 2.48
Min.—Max. 0.51—2.19 0.54—2.96 0.62—3.27
17°FDB
(Outdoor temp.)*
Rated 1.32 1.79 2.13
Max. 2.17 3.39 3.33
Fan
HIGH
W
53 84 139
MED 30 44 79
LOW 22 27 58
QUIET 15 46
Current Cooling Rated A 6.1 8.3 12.4
Heating 6.6 9.0 10.9
EER Cooling kW/kW 3.81 3.69 3.11
Btu/hW 13.0 12.6 10.6
COP Heating kW/kW 4.10 3.84 3.78
Btu/hW 14.0 13.1 12.9
SEER Cooling Btu/hW 19.0 17.5 16.5
HSPF Heating 10.9 10.8 10.4
Power factor Cooling %98.4 99.5 99.2
Heating 98.8 99.5 98.9
NOTES:
Specifications are based on the following conditions:
• Cooling: Indoor temperature of 80°FDB/67°FWB (26.67°CDB/19.44°CWB), and outdoor temperature of 95°FDB/75°FWB (35°CDB/23.9°CWB).
• Heating: Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 47°FDB/43°FWB (8.33°CDB/6.11°CWB).
• *: Heating (17°F): Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 17°FDB/15°FWB (-8.33°CDB/-9.44°CWB).
• Test conditions are based on AHRI 210/240 2017.
• Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
• Standard static pressure: 0.18 inWG (45 Pa)
- 3 - 1. Specifications
DUCT TYPE ARU18-36RGLX DUCT TYPE ARU18-36RGLX

Type
Duct
Inverter, Heat pump
Model name ARU36RGLX
Power supply 208/230 V~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Cooling
Rated kW 10.55
Btu/h 36,000
Min.—Max. kW 2.81—11.43
Btu/h 9,600—39,000
Heating
47°FDB
(Outdoor temp.)
Rated kW 10.55
Btu/h 36,000
Min.—Max. kW 2.70—14.07
Btu/h 9,200—48,000
17°FDB
(Outdoor temp.)*1
Rated kW 6.74
Btu/h 23,000
Max. kW 10.8
Btu/h 36,800
5°FDB
(Outdoor temp.)*2Rated kW 7.8
Btu/h 26,600
Input power
Cooling Rated
kW
3.91
Min.—Max. 0.7—4.0
Heating
47°FDB
(Outdoor temp.)
Rated 3.01
Min.—Max. 0.62—4.38
17°FDB
(Outdoor temp.)*1
Rated 2.52
Max. 5.01
5°FDB
(Outdoor temp.)*2Rated 4.02
Fan
HIGH
W
158
MED 94
LOW 59
QUIET 40
Current Cooling Rated A 17.1
Heating 13.2
EER2 Cooling kW/kW 2.7
Btu/hW 9.2
COP2 Heating kW/kW 3.5
Btu/hW 11.9
SEER2 Cooling Btu/hW 16.0
HSPF2 Heating 8.9
Power factor Cooling %99.4
Heating 99.1
Moisture removal pints/h (L/h) 5.3 (2.5)
Maximum operating current*3Cooling A17.6
Heating 19.1
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
1,207 (2,050)
MED 965 (1,640)
LOW 783 (1,330)
QUIET 630 (1,070)
Heating
HIGH 1,089 (1,850)
MED 965 (1,640)
LOW 783 (1,330)
QUIET 630 (1,070)
Type × Qty Sirocco fan × 3
Motor output W 375
Static pressure range inWG (Pa) 0.12 to 0.80 (30 to 200)
Sound pressure level*4
Cooling
HIGH
dB (A)
37
MED 33
LOW 30
QUIET 26
Heating
HIGH 35
MED 33
LOW 30
QUIET 26
Heat exchanger type
Dimensions (H × W × D) in (mm) 16-9/16 × 45-9/16 × 1-9/16 (420 × 1,158 × 39.9)
Fin pitch FPI 18
Rows × Stages 3 × 20
Pipe type Copper
Fin type Aluminum
Hydrophilic coating
Enclosure Material Steel
Color ―
Dimensions
(H × W × D)
Net in (mm) 11-13/16 × 55-1/8 × 27-9/16 (300 × 1,400 × 700)
Gross 15-3/4 × 64-1/2 × 34-7/16 (400 × 1,638 × 875)
Weight Net lb (kg) 121 (55)
Gross 141 (64)
Connection pipe Size Liquid in (mm) Ø3/8 (Ø9.52)
Gas Ø5/8 (Ø15.88)
Method Flare
Drain hose Material PVC
Tip diameter in (mm) Ø13/16 (20.7) (I.D.), Ø1-1/16 (26.6) (O.D.)
Operation range Cooling °F (°C) 64.4 to 89.6 (18 to 32)
%RH 80 or less
Heating °F (°C) 60.8 to 86.0 (16 to 30)
- 4 - 1. Specifications
DUCT TYPE ARU18-36RGLX DUCT TYPE ARU18-36RGLX

Type
Duct
Inverter, Heat pump
Model name ARU36RGLX
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80°FDB/67°FWB (26.67°CDB/19.44°CWB), and outdoor temperature of 95°FDB/75°FWB (35°CDB/23.9°CWB).
– Heating: Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 47°FDB/43°FWB (8.33°CDB/6.11°CWB).
– *1: Heating (17°F): Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 17°FDB/15°FWB (-8.33°CDB/-9.44°CWB).
– *2: Heating (5°F): Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 5°FDB/4°FWB (-15.0°CDB/-15.56°CWB).
– Test conditions are based on AHRI 210/240 2023.
– Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
– Standard static pressure: 0.23 inWG (57 Pa)
• Protective function might work when using it outside the operation range.
• *3: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and outdoor unit.
• *4: 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.
M condition
Model name ARU36RGLX
Capacity
Cooling
Rated kW 10.55
Btu/h 36,000
Min.—Max. kW 2.81—11.43
Btu/h 9,600—39,000
Heating
47°FDB
(Outdoor temp.)
Rated kW 10.55
Btu/h 36,000
Min.—Max. kW 2.70—14.07
Btu/h 9,200—48,000
17°FDB
(Outdoor temp.)*1
Rated kW 6.74
Btu/h 23,000
Max. kW 10.8
Btu/h 36,800
Input power
Cooling Rated
kW
3.6
Min.—Max. 0.7—4.0
Heating
47°FDB
(Outdoor temp.)
Rated 2.88
Min.—Max. 0.62—4.38
17°FDB
(Outdoor temp.)*1
Rated 2.52
Max. 5.01
Fan
HIGH
W
158
MED 94
LOW 59
QUIET 40
Current Cooling Rated A 15.8
Heating 12.6
EER Cooling kW/kW 2.93
Btu/hW 10.0
COP Heating kW/kW 3.66
Btu/hW 12.5
SEER Cooling Btu/hW 16.7
HSPF Heating 11.3
Power factor Cooling kW/kW 99.1
Heating 99.4
NOTES:
Specifications are based on the following conditions:
• Cooling: Indoor temperature of 80°FDB/67°FWB (26.67°CDB/19.44°CWB), and outdoor temperature of 95°FDB/75°FWB (35°CDB/23.9°CWB).
• Heating: Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 47°FDB/43°FWB (8.33°CDB/6.11°CWB).
• *: Heating (17°F): Indoor temperature of 70°FDB/60°FWB (21.11°CDB/15.56°CWB), and outdoor temperature of 17°FDB/15°FWB (-8.33°CDB/-9.44°CWB).
• Test conditions are based on AHRI 210/240 2017.
• Pipe length: 24 ft 7 in (7.5 m), Height difference: 0 ft (0 m). (Between outdoor unit and indoor unit.)
• Standard static pressure: 0.23 inWG (57 Pa)
- 5 - 1. Specifications
DUCT TYPE ARU18-36RGLX DUCT TYPE ARU18-36RGLX

2. Dimensions
2-1. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX
Unit: in (mm)
Air
Gas pipe
Drain
port
Control
box
Liquid pipe
Side view (L) Side view (R) Top view
Front view
Rear view
Ø3/16
(Ø4.5) 3-15/16
(100)
2-5/16
(59)
5-1/2
(139)
6-5/16
(160)
3-1/8
(80)
7-1/2
(190) Ø4-15/16
(Ø125)
5-1/2
(140)
Ø3/16
(Ø4)
40-15/16 (1,040)
35-1/4 (895)
2-1/16
(53)
P3-15/16 × 8 = 31-1/2
(P100 × 8 = 800)
1-7/8
(47)
1 (25)1 (25) 27-9/16 (700)
24-13/16 (631)
2-3/8 (60)
1-15/16
(49) 1-15/16
(49)
39-3/8 (1,000)
30 (762)
7-1/4
(184)
P3-15/16 × 7 = 27-9/16
(P100 × 7 = 700)
1-1/4
(31)
1-1/8
(29)
8-1/4
(210)
5-11/16
(145)
11-13/16
(300)
12-5/8
(320)
11 (280)
11-13/16
(300)
2-15/16
(75)
5-7/8
(150)
Ø3/16
(Ø4.5)
8-9/16
(217)
2-1/4
(57)
2-5/8 (66)
3-7/8 (98)
1-5/8
(41)
8-11/16
(220)
7/8 (22)
10-1/16
(255)
- 6 -
2-1. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX 2. Dimensions
DUCT TYPE ARU18-36RGLX DUCT TYPE ARU18-36RGLX