Fujitsu ACUH09LUAS1 Service manual

AIR CONDITIONER
Cassette type
DESIGN & TECHNICAL MANUAL
INDOOR
ACUH09LUAS1
ACUH12LUAS1
ACUH18LUAS1
OUTDOOR
AOUH09LUAS1 AOUH12LUAS1
AOUH18LUAS1
DR_AU038EF_02
2021.06.30

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 © 2021 Fujitsu General Limited. All rights reserved.

CONTENTS
Part 1. INDOOR UNIT...........................................................................1
1. Specifications................................................................................................2
2. Dimensions....................................................................................................4
2-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1 ....................................4
2-2. Installation space requirement .........................................................................................5
3. Wiring diagram ..............................................................................................6
3-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1 ....................................6
4. Capacity table................................................................................................7
4-1. Cooling capacity...............................................................................................................7
4-2. Heating capacity ..............................................................................................................9
5. Fan performance .........................................................................................11
5-1. Air velocity distributions..................................................................................................11
5-2. Airflow ............................................................................................................................17
6. Operation noise (sound pressure).............................................................20
6-1. Noise level curve............................................................................................................20
6-2. Sound level check point .................................................................................................22
7. Safety devices .............................................................................................23
8. External input and output...........................................................................24
8-1. External input.................................................................................................................24
8-2. External output...............................................................................................................26
8-3. Combination of external input and output.......................................................................28
8-4. Details of function ..........................................................................................................31
9. Function settings .......................................................................................56
9-1. Function settings on indoor unit .....................................................................................56
9-2. Function settings by using remote controller..................................................................57
10. Accessories.................................................................................................66
10-1.Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1 .................................66
11. Optional parts .............................................................................................67
11-1.Controllers ....................................................................................................................67
11-2.Cassette grille ...............................................................................................................67
11-3.Others ...........................................................................................................................68

Part 2. OUTDOOR UNIT.....................................................................71
1. Specifications..............................................................................................72
2. Dimensions..................................................................................................73
2-1. Models: AOUH09LUAS1................................................................................................73
2-2. Models: AOUH12LUAS1 and AOUH18LUAS1 ..............................................................74
3. Installation space ........................................................................................75
3-1. Models: AOUH09LUAS1, AOUH12LUAS1, and AOUH18LUAS1 .................................75
4. Refrigerant circuit .......................................................................................78
4-1. Models: AOUH09LUAS1................................................................................................78
4-2. Models: AOUH12LUAS1 and AOUH18LUAS1 ..............................................................79
5. Wiring diagrams ..........................................................................................80
5-1. Model: AOUH09LUAS1 .................................................................................................80
5-2. Models: AOUH12LUAS1 and AOUH18LUAS1 ..............................................................81
6. Capacity compensation rate for pipe length and height difference........82
6-1. Model: AOUH09LUAS1 .................................................................................................82
6-2. Model: AOUH12LUAS1 .................................................................................................83
6-3. Model: AOUH18LUAS1 .................................................................................................84
7. Additional charge calculation ....................................................................85
7-1. Model: AOUH09LUAS1 .................................................................................................85
7-2. Model: AOUH12LUAS1 .................................................................................................85
7-3. Model: AOUH18LUAS1 .................................................................................................85
8. Airflow..........................................................................................................86
8-1. Model: AOUH09LUAS1 .................................................................................................86
8-2. Model: AOUH12LUAS1 .................................................................................................86
8-3. Model: AOUH18LUAS1 .................................................................................................87
9. Operation noise (sound pressure).............................................................88
9-1. Noise level curve............................................................................................................88
9-2. Sound level check point .................................................................................................89
10. Electrical characteristics............................................................................90
11. Safety devices .............................................................................................91
12. Accessories.................................................................................................92
12-1.Models: AOUH09LUAS1, AOUH12LUAS1, and AOUH18LUAS1 ................................92
CONTENTS (continued)

Part 1. INDOOR UNIT
CASSETTE TYPE:
ACUH09LUAS1
ACUH12LUAS1
ACUH18LUAS1

1. Specifications
Type
Cassette
Inverter heat pump
Model name ACUH09LUAS1 ACUH12LUAS1 ACUH18LUAS1
Power supply 208/230 V ~ 60 Hz
Available voltage range 187—253 V
Capacity
Cooling Cooling
Rated kW 2.64 3.52 5.02
Btu/h 9,000 12,000 17,100
Min.—Max. kW 0.90—3.20 0.90—4.00 0.90—5.90
Btu/h 3,100—11,000 3,100—13,600 3,100—20,100
Heating
47 °FDB
(Outdoor temp.)
Rated kW 3.52 4.69 6.33
Btu/h 12,000 16,000 21,600
Min.—Max. kW 0.90—4.70 0.90—5.70 0.90—7.00
Btu/h 3,100—16,000 3,100—19,400 3,100—23,900
17 °FDB
(Outdoor temp.)
Rated kW 2.17 3.08 4.22
Btu/h 7,400 10,500 14,400
Max. kW 3.08 4.98 5.75
Btu/h 10,500 17,000 19,600
Input power
Cooling Cooling Rated
kW
0.66 0.94 1.37
Max. 1.05 2.06 2.35
Heating
47 °FDB
(Outdoor temp.)
Rated 0.93 1.44 1.81
Max. 1.72 1.79 2.57
17 °FDB
(Outdoor temp.)
Rated 0.78 1.07 1.49
Max. 1.42 2.01 2.56
Current Cooling Rated A 3.3 4.2 6.1
Heating 4.6 6.4 8.1
EER Cooling kW/kW 4.00 3.74 3.66
Btu/hW 13.6 12.8 12.5
COP Heating kW/kW 3.78 3.25 3.50
Btu/hW 12.9 11.1 11.9
SEER Cooling Btu/hW 22.5 22.1 20.8
HSPF Heating Btu/hW 12.5 12.2 11.6
Power factor Cooling %87.0 97.3 97.6
Heating 86.0 97.8 97.2
Moisture removal pints/h (L/h) 1.3 (0.6) 2.5 (1.2) 4.6 (2.2)
Maximum operating current *1Cooling A6.8 9.8 11.8
Heating 9.3 11.3 14.8
Fan
Airflow rate
Cooling
HIGH
CFM (m3/h)
318 (540) 359 (610) 435 (740)
MED 288 (490) 312 (530) 341 (580)
LOW 259 (440) 276 (470) 288(490)
QUIET 230 (390) 241 (410)
Heating
HIGH 318 (540) 359 (610) 435 (740)
MED 288 (490) 312 (530) 341 (580)
LOW 259 (440) 276 (470) 288 (490)
QUIET 230 (390) 241 (410)
Type × Q'ty Turbo × 1
Motor output W 54
Sound pressure level *2
Cooling
HIGH
dB (A)
33 37 42
MED 32 33 36
LOW 29 31 32
QUIET 28
Heating
HIGH 34 37 44
MED 32 33 40
LOW 29 31 36
QUIET 27 28 30
Heat exchanger type
Dimensions (H × W × D) in (mm)
Main 1: 8-4/16 × 51-9/16 × 1/2
(210 × 1,310 × 13.3)
Main 2: 8-4/16 × 49-3/16 × 1/2
(210 × 1,250 × 13.3)
Fin pitch FPI Main 1: 1.2
Main 2: 1.2
Rows × Stages Main 1: 1 × 10
Main 2: 1 × 10
Pipe type Copper tube
Fin type Aluminum
Dimensions
(H × W × D)
Net in (mm) 9-5/8 × 22-7/16 × 22-7/16 (245 × 570 × 570)
Gross 10-7/16 × 28-3/4 × 24-5/8 (265 × 730 × 625)
Weight Net lb (kg) 33 (15)
Gross 40 (18) 42 (19)
Connection pipe Size Liquid in (mm) Ø1/4 (Ø6.35)
Gas Ø3/8 (Ø9.52) Ø1/2 (Ø12.70)
Method Flare
Operation range Cooling °F (°C) 64 to 90 (18 to 32)
%RH 80 or less
Heating °F (°C) 60 to 86 (16 to 30)
Drain hose
Material HARD PVC
Size in (mm) Ø3/4 (Ø20.7) [I.D.]
Ø1-1/16 (Ø26.6) [O.D.]
Cassette grille
(Grid type: Option)
Model name UTG-CCGFGA
Material PS
Color White
Approximate color of Munsell 9PB 9.1/0.2
Dimensions
(H × W × D)
Net in (mm) 1-15/16 × 24-7/16 × 24-7/16 (49 × 620 × 620)
Gross 4-3/4 × 30-1/8 × 29-3/4 (120 × 765 × 755)
Weight Net lb (kg) 5.1 (2.3)
Gross 10 (4.5)
- 2 - 1. Specifications
CASSETTE TYPE ADUH09-18LUAS1 CASSETTE TYPE ADUH09-18LUAS1

Type
Cassette
Inverter heat pump
Model name ACUH09LUAS1 ACUH12LUAS1 ACUH18LUAS1
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB (26.67 °CDB) /67 °FWB (19.44 °CWB), and outdoor temperature of 95 °FDB (35 °CDB) / 75 °FWB (23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB) /59 °FWB (15 °CWB), and outdoor temperature of 47 °FDB (8.33 °CDB) /43 °FWB (6.11 °CWB).
– Pipe length: 24 ft 6 in (7.5 m), Height difference: 0 ft (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.
- 3 - 1. Specifications
CASSETTE TYPE ADUH09-18LUAS1 CASSETTE TYPE ADUH09-18LUAS1

2. Dimensions
2-1. Models: ACUH09LUAS1, ACUH12LUAS1, and
ACUH18LUAS1
Unit: in (mm)
Ceiling
B
View A
22-7/16 (570): Indoor unit
Hanging bolt position
a: Ceiling openings
20-7/8 (530)
Hanging bolt position
Drain hose
A
4-7/8 (124)
Control Box
C
24-7/16 (620)
24-7/16 (620)
IR receiver
Grid type grille
View B View C
20-7/8
(530)
2-15/16
(75)
14-9/16
(370)
21-1/4 (540)
11-1/4
(285)
11-1/4
(285)
4-1/2 (114)
4-1/2 (114)
10-5/16
(262)
9-5/8
(245)
5-13/16
(146)
1-9/16
(40)
4
(102)
5-5/16
(135)
9-13/16
(250)
1-3/5
(40)
3-7/8
(99)
1-3/16
(30)
1-3/16 (30)
2-5/16 (58) 4-1/8
(108)
a: Ceiling openings
Cassette grille (Option [Grid type]) in (mm) 22-13/16 to 24 (580 to 610)
- 4 -
2-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1 2. Dimensions
CASSETTE TYPE ADUH09-18LUAS1 CASSETTE TYPE ADUH09-18LUAS1

2-2. Installation space requirement
40 (1,000)
or more
40 (1,000)
or more
99 (2,500)
or more
11 (262)
or more
Strong and durable ceiling
Obstruction
Floor
Unit: in (mm)
Maximum height from floor to ceiling [Unit: in (mm)]
Standard 107 (2,700)
High ceiling 119 (3,000)
3-way direction setting:
4 (100) or more*
Unit: in (mm)
NOTES:
• To set “3-direction”, optional Air outlet shutter plate (UTR-YDZB) must be installed, and the “out-
let-direction” need to be switched to “3-way” by remote controller.
*When installing the indoor unit, be careful about the maintenance space.
• In 3-way outlet mode, changing of ceiling height setting by function setting 20 is prohibited.
(Ceiling height setting [function setting 20] is allowed to be changed only in 4-way outlet mode.)
- 5 -
2-2. Installation space requirement 2. Dimensions
CASSETTE TYPE ADUH09-18LUAS1 CASSETTE TYPE ADUH09-18LUAS1

3. Wiring diagram
3-1. Models: ACUH09LUAS1, ACUH12LUAS1, and
ACUH18LUAS1
- 6 -
3-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1 3. Wiring diagram
CASSETTE TYPE ADUH09-18LUAS1 CASSETTE TYPE ADUH09-18LUAS1