Fujitsu ACUH09LUAS1 User manual

AIR CONDITIONER
Cassette type
SERVICE MANUAL
INDOOR
ACUH09LUAS1
ACUH12LUAS1
ACUH18LUAS1
OUTDOOR
AOUH09LUAS1 AOUH12LUAS1
AOUH18LUAS1
SR_AU021EF_02
2021.04.26

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
1. GENERAL INFORMATION
2. TECHNICAL DATA AND PARTS LIST
3. TROUBLESHOOTING
4. CONTROL AND FUNCTIONS
5. FILED WORKING

1. GENERAL INFORMATION
2021.04.02
SR_CH01_AU021EF_01

CONTENTS
1. GENERAL INFORMATION
1. Specifications..............................................................................................01-1
1-1. Indoor unit ......................................................................................................................01-1
1-2. Outdoor unit....................................................................................................................01-3
2. Dimensions..................................................................................................01-4
2-1. Indoor unit ......................................................................................................................01-4
2-2. Outdoor unit....................................................................................................................01-6

1. Specifications
1-1. Indoor unit
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 k→ 2.64 3.52 5.02
Btu/h 9,000 12,000 17,100
Min.—Max. k→ 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 k→ 3.52 4.69 6.33
Btu/h 12,000 16,000 21,600
Min.—Max. k→ 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 k→ 2.17 3.08 4.22
Btu/h 7,400 10,500 14,400
Max. k→ 3.08 4.98 5.75
Btu/h 10,500 17,000 19,600
Input power
Cooling Cooling Rated
k→
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 k→/k→ 4.00 3.74 3.66
Btu/h→ 13.6 12.8 12.5
COP Heating k→/k→ 3.78 3.25 3.50
Btu/h→ 12.9 11.1 11.9
SEER Cooling Btu/h→ 22.5 22.1 20.8
HSPF Heating Btu/h→ 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)
LO→ 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)
LO→ 259 (440) 276 (470) 288 (490)
QUIET 230 (390) 241 (410)
Type × Q'ty Turbo × 1
Motor output → 54
Sound pressure level *2
Cooling
HIGH
dB (A)
33 37 42
MED 32 33 36
LO→ 29 31 32
QUIET 28
Heating
HIGH 34 37 44
MED 32 33 40
LO→ 29 31 36
QUIET 27 28 30
Heat exchanger type
Dimensions (H × → × 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 × → × 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)
→eight 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 →hite
Approximate color of Munsell 9PB 9.1/0.2
Dimensions
(H × → × 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)
→eight Net lb (kg) 5.1 (2.3)
Gross 10 (4.5)
1-1. Indoor unit - (01-1) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

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 °F→B (19.44 °C→B), and outdoor temperature of 95 °FDB (35 °CDB) / 75 °F→B (23.9 °C→B).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB) /59 °F→B (15 °C→B), and outdoor temperature of 47 °FDB (8.33 °CDB) /43 °F→B (6.11 °C→B).
– 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 →LAN adapter is also required. For details, refer to the setting manual.
1-1. Indoor unit - (01-2) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

1-2. Outdoor unit
Type Inverter heat pump
Model name AOUH09LUAS1 AOUH12LUAS1 AOUH18LUAS1
Power supply 208/230 V ~ 60 Hz
Power supply intake Outdoor unit
Available voltage range 187—253 V
Starting current A 4.6 6.4 8.1
Fan
Airflow rate Cooling CFM (m3/h) 906 (1,540) 1,171 (1,990) 1,395 (2,370)
Heating 1,089 (1,850) 1,460 (2,480)
Type × Q'ty Propeller fan × 1
Motor output → 23 49
Sound pressure level *1 Cooling dB (A) 44 48 52
Heating 48 49 55
Heat exchanger type
Dimensions
(H × → × D) in (mm)
Main1: 19-13/16 × 34-11/16 ×
11/16
(504 × 881 × 18.19)
Main2: 19-13/16 × 33-1/2 ×
11/16
(504 × 851 × 18.19)
Main1: 23-1/8 × 34-11/16 × 11/16
(588 × 881 × 18.19)
Main2: 23-1/8 × 33-1/2 × 11/16
(588 × 851 × 18.19)
Fin pitch FPI 20
Rows × Stages Main1: 1 × 24
Main2: 1 × 24
Main1: 1 × 28
Main2: 1 × 28
Pipe type Copper
Fin type Type (Material) Aluminum
Surface treatment PC fin
Compressor Type DC rotary × 1 DC twin rotary × 1
Motor output → 900 1,030
Refrigerant
Type R410A
Charge lb oz 2lbs.3oz. 2lbs.10oz. 2lbs.12oz.
g 1,000 1,200 1,250
Refrigerant oil Type RB68
Amount in3 (cm3)20.7 (340) 24.4 (400)
Enclosure
Material Steel sheet
Color Beige
Approximate color of Munsell 10↔R 7.5/1.0
Dimensions
(H × → × D)
Net
in (mm)
21-5/16 × 31-7/16 × 11-7/16
(542 × 799 × 290)
24-7/8 × 31-7/16 × 11-7/16
(632 × 799 × 290)
Gross 23-11/16 × 37 × 14-3/4
(602 × 940 × 375)
27-1/4 × 37 × 14-3/4
(692 × 940 × 375)
→eight Net lb (kg) 70 (32) 84 (38) 86 (39)
Gross 77 (35) 95 (43)
Connection pipe
Size Liquid in (mm) Ø 1/4 (Ø 6.35)
Gas Ø 3/8 (Ø 9.52) Ø 1/2 (Ø 12.7)
Method Flare
Pre-charge length
ft (m)
49 (15) 66 (20)
Max. length 66 (20) 98 (30)
Max. height difference 49 (15)
Operation range Cooling °F (°C) 14 to 115 (-10 to 46)
Heating -5 to 75 (-21 to 24)
Drain hose Material PP
Tip diameter in (mm) Ø 1/2 (Ø 13.0) (I. D.), Ø 5/8 to 11/16 (Ø 16.0 to 16.8) (O. D.)
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 80 °FDB (26.67 °CDB) / 67 °F→B (19.44 °C→B), and outdoor temperature of 95 °FDB (35 °CDB) / 75 °F→B (23.9 °C→B).
– Heating: Indoor temperature of 70 °FDB (21.11 °CDB) / 59 °F→B (15 °C→B), and outdoor temperature of 47 °FDB (8.33 °CDB) / 43 °F→B (6.11 °C→B).
– 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: 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.
1-2. Outdoor unit - (01-3) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

2. Dimensions
2-1. Indoor unit
¢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)
2-1. Indoor unit - (01-4) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢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-↔DZB) must be installed, and the “out-
let-direction” need to be switched to “3-way” by remote controller.
*→hen 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.)
2-1. Indoor unit - (01-5) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit
¢Models: AOUH09LUAS1
Top view
22-13/16 (580) 4-5/16 (109)
13 (330)
13-7/8 (353)
Pitch of bolts for installation
Pitch of bolts for installation
4- M1 0 hole
31-7/16 (799) 2-11/16 (68)
1-5/16 (33) 1-3/16 (30)
3/4 (19)
21-5/16 (542)
13/16 (20)
Side viewSide view Front view
11-7/16 (290)1/2 (13)
Unit: in (mm)
Bottom view
Airflow
Drain port Ø1-5/8 (42)
Side view (Valve part)
4-3/4 (120)
4-1/4 (184)
7-1/16 (180)
1-7/16 (37)
15-11/16 (399)
Hole
Hole
Hole
2-2. Outdoor unit - (01-6) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢Models: AOUH12LUAS1 and AOUH18LUAS1
Side viewSide view Front view
Top view
22-13/16 (580)
31-7/16 (799)3/4 (19) 2-11/16 (68) 1/2 (13) 11-7/16 (290)
1-5/16 (33) 1-3/16 (30)
4-5/16 (109)
13-7/8 (353)
24-7/8 (632)
13/16 (20)
13 (330)
Pitch of bolts for installation
Pitch of bolts for installation
4-
M1 0 hole
Unit: in (mm)
Side view (Valve part)
4-3/4 (120)
4-1/4 (184)
7-1/16 (180)
Bottom view
Airflow
Drain port Ø1-5/8 (42)
1-7/16 (37)
15-11/16 (399)
Hole
Hole
Hole
2-2. Outdoor unit - (01-7) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit - (01-8) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2. TECHNICAL DATA AND PARTS LIST
2021.04.02
SR_CH02_AU021EF_01

CONTENTS
2. TECHNICAL DATA AND PARTS LIST
1. Precautions..................................................................................................02-1
2. Cassette grille (optional part) parts list.....................................................02-2
2-1. Model: UTG-CCGFGA....................................................................................................02-2
3. Indoor unit parts list....................................................................................02-4
3-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1...................................02-4
4. Outdoor unit parts list.................................................................................02-8
4-1. Model: AOUH09LUAS1 ..................................................................................................02-8
4-2. Models: AOUH12LUAS1 and AOUH18LUAS1.............................................................02-12
5. Accessories ...............................................................................................02-16
5-1. Indoor unit ....................................................................................................................02-16
5-2. Outdoor unit..................................................................................................................02-16
6. Optional parts ...........................................................................................02-17
6-1. Indoor unit ....................................................................................................................02-17
7. Refrigerant system diagrams...................................................................02-20
7-1. Models: AOUH09LUAS1 ..............................................................................................02-20
7-2. Models: AOUH12LUAS1 and AOUH18LUAS1.............................................................02-21
8. Wiring diagrams ........................................................................................02-22
8-1. Indoor unit ....................................................................................................................02-22
8-2. Outdoor unit..................................................................................................................02-23
9. PC board diagrams ...................................................................................02-25
9-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1.................................02-25
9-2. Models: AOUH09LUAS1 ..............................................................................................02-26
9-3. Models: AOUH12LUAS1 and AOUH18LUAS1.............................................................02-27

1. Precautions
→hen you start servicing, pay attention to the following points. For detailed precautions, refer to the
installation manual of the products.
CAUTION
• Service personnel
– Any person who is involved with working on or breaking into a refrigerant circuit should hold a
current valid certificate from an industry-accredited assessment authority, which authorizes
their competence to handle refrigerants safely in accordance with an industry recognized as-
sessment specification.
– Servicing shall only be performed as recommended by the equipment manufacturer. Mainte-
nance and repair requiring the assistance of other skilled personnel shall be carried out under
the supervision of the person competent in the use of flammable refrigerants.
– Servicing shall be performed only as recommended by the manufacturer.
• →ork
– →ork in confined spaces shall be avoided.
– The area around the workspace shall be sectioned off.
– Electric shock may occur. After turning off the power, always wait 5 minutes before touching
electrical components.
– Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could result in
damage to the fins or personal injury such as skin rupture.
– Do not place any other electrical products or household belongings under the product.
– Condensation dripping from the product might get them wet, and may cause damage or mal-
function to the property.
• Service parts information and design are subject to change without notice for product improve-
ment.
• For the latest information of the service parts, refer to our Service Portal.
https://fujitsu-general.force.com/portal/
• Precise figure of the service parts listed in this manual may differ from the actual service parts.
- (02-1) - 1. Precautions
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

2. Cassette grille (optional part) parts list
2-1. Model: UTG-CCGFGA
¢Overall
17
16
15
5
4
6
7
8
23
1
9
14
13
11
12
10
2-1. Model: UTG-CCGFGA - (02-2) - 2. Cassette grille (optional part) parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

Item no. Part no. Part name Service part
1 9377760043 Flap total assy ♦
2 9377759047 Flap assy B ♦
3 9375727048 Flap assy A ♦
4 9375746018 Motor holder assy B ♦
5 9900139087 Step motor (with Red connector) ♦
6 9375530013 Panel cover ♦
7 9711310002 Indicator PCB ♦
8 9383100024 Display panel assy ♦
9 9375549015 Connector cover ♦
10 9382862008 Intake grille assy ♦
11 9375546014 Hook bracket ♦
12 9375532031 Grille hook ♦
13 9382863005 Intake grille ♦
14 9375533014 Long-life filter ♦
15 9382821012 Decoration panel ♦
16 9375745011 Motor holder assy A ♦
17 9900139070 Step motor (with →hite connector) ♦
— 9711276001 →ire with connector ♦
2-1. Model: UTG-CCGFGA - (02-3) - 2. Cassette grille (optional part) parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

3. Indoor unit parts list
3-1. Models: ACUH09LUAS1, ACUH12LUAS1, and
ACUH18LUAS1
¢Chassis and PC boards
13
18
17
19
1
12
11
10
14
16
15
a
3
9
5
7
8
6
4
2
3-1. Models: ACUH09LUAS1, ACUH12LUAS1, and ACUH18LUAS1 - (02-4) - 3. Indoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST