Fujitsu ARU24RGLX Service manual

AIR CONDITIONER
Duct type
DESIGN & TECHNICAL MANUAL
INDOOR
ARU12RGLX ARU18RGLX
ARU24RGLX
ARU30RGLX
ARU36RGLX
ARU42RGLX
ARU48RGLX
OUTDOOR
AOU12RLFC AOU18RGLX
AOU24RGLX
AOU30RGLX
AOU36RGLX
AOU42RGLX
AOU48RGLX
DR_AR025EF_04
2019.07.01

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 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................8
2-1. Model: ARU12RGLX........................................................................................................8
2-2. Models: ARU18RGLX, ARU24RGLX, and ARU30RGLX.................................................9
2-3. Models: ARU36RGLX, ARU42RGLX, and ARU48RGLX...............................................10
2-4. Installation space requirement .......................................................................................11
2-5. Maintenance space requirement....................................................................................12
3. Wiring diagrams ..........................................................................................13
3-1. Models: ARU12RGLX, ARU18RGLX, and ARU24RGLX...............................................13
3-2. Models: ARU30RGLX, ARU36RGLX, ARU42RGLX, and ARU48RGLX .......................14
4. Capacity table..............................................................................................15
4-1. Cooling capacity.............................................................................................................15
4-2. Heating capacity ............................................................................................................22
5. Fan performance .........................................................................................26
5-1. Fan performance curve..................................................................................................26
5-2. Airflow ............................................................................................................................40
6. Operation noise (sound pressure).............................................................47
6-1. Noise level curve............................................................................................................47
6-2. Sound level check point .................................................................................................50
7. Safety devices .............................................................................................51
8. External input and output...........................................................................52
8-1. External input.................................................................................................................52
8-2. External output...............................................................................................................54
8-3. Combination of external input and output.......................................................................55
8-4. Details of function ..........................................................................................................58
9. Function settings ........................................................................................83
9-1. Function settings on indoor unit .....................................................................................83
9-2. Function settings by using remote controller..................................................................85
10. Accessories.................................................................................................93
11. Optional parts .............................................................................................94
11-1.Controllers ....................................................................................................................94
11-2.Others ...........................................................................................................................95

Part 2. OUTDOOR UNIT.....................................................................97
1. Specifications..............................................................................................98
2. Dimensions................................................................................................101
2-1. Model: AOU12RLFC....................................................................................................101
2-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................102
2-3. Models: AOU42RGLX and AOU48RGLX ....................................................................103
3. Installation space ......................................................................................104
3-1. Model: AOU12RLFC....................................................................................................104
3-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................107
3-3. Models: AOU42RGLX and AOU48RGLX ....................................................................110
4. Refrigerant circuit .....................................................................................113
4-1. Model: AOU12RLFC....................................................................................................113
4-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................114
4-3. Models: AOU42RGLX and AOU48RGLX ....................................................................115
5. Wiring diagrams ........................................................................................116
5-1. Model: AOU12RLFC....................................................................................................116
5-2. Model: AOU18RGLX....................................................................................................117
5-3. Models: AOU24RGLX, AOU30RGLX, and AOU36RGLX ............................................118
5-4. Models: AOU42RGLX and AOU48RGLX ....................................................................119
6. Capacity compensation rate for pipe length and height difference......120
6-1. Model: AOU12RLFC....................................................................................................120
6-2. Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX.....................121
6-3. Models: AOU42RGLX and AOU48RGLX ....................................................................122
7. Additional charge calculation ..................................................................123
7-1. Model: AOU12RLFC....................................................................................................123
7-2. Model: AOU18RGLX....................................................................................................123
7-3. Models: AOU24RGLX, AOU30RGLX, and AOU36RGLX ............................................123
7-4. Models: AOU42RGLX and AOU48RGLX ....................................................................124
8. Airflow........................................................................................................125
8-1. Model: AOU12RLFC....................................................................................................125
8-2. Model: AOU18RGLX....................................................................................................125
8-3. Model: AOU24RGLX....................................................................................................125
8-4. Model: AOU30RGLX....................................................................................................126
8-5. Model: AOU36RGLX....................................................................................................126
8-6. Model: AOU42RGLX....................................................................................................126
8-7. Model: AOU48RGLX....................................................................................................127
9. Operation noise (sound pressure)...........................................................128
9-1. Noise level curve..........................................................................................................128
9-2. Sound level check point ...............................................................................................131
10. Electrical characteristics..........................................................................132
CONTENTS (continued)

11. Safety devices ...........................................................................................133
12. External input and output (For AOU42RGLX and AOU48RGLX)...........135
12-1.External input..............................................................................................................135
12-2.External output............................................................................................................137
13. Function settings (For AOU42RGLX and AOU48RGLX) ........................139
13-1.Local setting switch buttons ........................................................................................139
13-2.Local setting procedure...............................................................................................141
14. Accessories...............................................................................................144
14-1.Model: AOU12RLFC...................................................................................................144
14-2.Models: AOU18RGLX, AOU24RGLX, AOU30RGLX, and AOU36RGLX....................144
14-3.Models: AOU42RGLX and AOU48RGLX ...................................................................144
15. Optional parts ...........................................................................................145
CONTENTS (continued)

Part 1. INDOOR UNIT
DUCT TYPE:
ARU12RGLX
ARU18RGLX
ARU24RGLX
ARU30RGLX
ARU36RGLX
ARU42RGLX
ARU48RGLX

1. Specifications
Type
Duct
Inverter heat pump
Model name ARU12RGLX
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Capacity
Cooling
Rated kW 3.52
Btu/h 12,000
Min.—Max. kW 0.9—4.0
Btu/h 3,100—13,600
Heating
47 °FDB
(Outdoor temp.)
Rated kW 4.69
Btu/h 16,000
Min.—Max. kW 0.9—5.7
Btu/h 3,100—19,400
17 °FDB
(Outdoor temp.)
Rated kW 4.27
Btu/h 14,500
Max. kW 5.18
Btu/h 17,600
Input power
Cooling Rated
kW
0.89
Min.—Max. 0.12—1.45
Heating
47 °FDB
(Outdoor temp.)
Rated 1.20
Min.—Max. 0.14—1.84
17 °FDB
(Outdoor temp.)
Rated 1.28
Max. 1.97
Fan
HIGH
W
61
MED 34
LOW 24
QUIET 16
Current Cooling Rated A 3.9
Heating 5.3
EER Cooling kW/kW 3.93
Btu/hW 13.4
COP Heating kW/kW 3.90
Btu/hW 13.3
SEER Cooling Btu/hW 21.3
HSPF Heating 11.7
Power factor Cooling %99.2
Heating 98.4
Moisture removal pints/h (L/h) 1.5 (0.7)
Maximum operating current *1Cooling A9.4
Heating 10.9
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
500 (850)
MED 400 (680)
LOW 347 (590)
QUIET 300 (510)
Heating
HIGH 500 (850)
MED 400 (680)
LOW 347 (590)
QUIET 300 (510)
Type × Q'ty Sirocco fan × 1
Motor output W 154
Static pressure range Pa 30 to 200
Sound pressure level *2
Cooling
HIGH
dB (A)
35
MED 30
LOW 27
QUIET 24
Heating
HIGH 35
MED 30
LOW 27
QUIET 24
Heat exchanger type
Dimensions (H × W × D) in (mm) 16-9/16 × 18-1/16 × 1-9/16 (420 × 458 × 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 × 27-9/16 × 27-9/16 (300 × 700 × 700)
Gross 15-3/4 × 36-15/16 × 34-7/16 (400 × 938 × 875)
Weight Net lb (kg) 66 (30)
Gross 82 (37)
Connection pipe Size Liquid in (mm) Ø 1/4 (Ø 6.35)
Gas Ø 3/8 (Ø 9.52)
Method Flare
Drain hose Material PVC
Size in (mm) Ø 13/16 (20.7) [I.D.], Ø 1-1/16 (26.6) [O.D.] (VP25)
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 ARU12-48RGLX DUCT TYPE ARU12-48RGLX

Type
Duct
Inverter heat pump
Model name ARU12RGLX
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/59 °FWB (21.11 °CDB/15 °CWB), and outdoor temperature of 47 °FDB/43 °FWB (8.33 °CDB/6.11 °CWB).
– 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 in.WG (45 Pa)
• Protective function might work when using it outside the operation range.
• *1: Maximum current:
– The maximum value when operated within the operation range.
– The total current of indoor unit and 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 - 1. Specifications
DUCT TYPE ARU12-48RGLX DUCT TYPE ARU12-48RGLX

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—8.5 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—7.5 1.58—9.5 2.7—11.43
Btu/h 5,400—25,600 5,400—32,400 9,200—39,000
17 °FDB
(Outdoor temp.)
Rated kW 4.76 6.07 7.25
Btu/h 16,200 20,700 24,700
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 1.49 2.36 2.53
Max. 2.17 3.39 3.33
Fan
HIGH
W
53 84 139
MED 30 44 79
LOW 22 27 58
QUIET 15 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
Moisture removal pints/h (L/h) 3.8 (1.8) 4.0 (1.9) 5.1 (2.4)
Maximum operating current *1Cooling A13.6 15.6 15.6
Heating 14.1 16.1 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 × Q'ty Sirocco fan × 2
Motor output W 197 375
Static pressure range Pa 30 to 200
Sound pressure level *2
Cooling
HIGH
dB (A)
31 35 38
MED 28 30 34
LOW 25 28 30
QUIET 24 24 29
Heating
HIGH 31 35 38
MED 28 30 34
LOW 25 28 30
QUIET 24 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) Ø 1/4 (Ø 6.35) Ø 3/8 (Ø 9.52)
Gas Ø 1/2 (Ø 12.7) Ø 5/8 (Ø 15.88)
Method Flare
Drain hose Material PVC
Size in (mm) Ø 13/16 (20.7) [I.D.], Ø 1-1/16 (26.6) [O.D.] (VP25)
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 ARU12-48RGLX DUCT TYPE ARU12-48RGLX