Fujitsu AUXG36KRLB User manual

AIR CONDITIONER
Cassette type
SERVICE MANUAL
INDOOR
AUXG36KRLB
AUXG45KRLB
AUXG54KRLB
OUTDOOR
AOYG36KRTA AOYG45KRTA
AOYG54KRTA
SR_AU014EF_03
2020.11.16

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, 2020 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
2020.11.16
SR_CH01_AU014EF_02

CONTENTS
1. GENERAL INFORMATION
1. Specifications..............................................................................................01-1
1-1. Indoor unit ......................................................................................................................01-1
1-2. Outdoor unit....................................................................................................................01-3
2. Dimensions..................................................................................................01-5
2-1. Indoor unit ......................................................................................................................01-5
2-2. Outdoor unit....................................................................................................................01-8

1. Specifications
1-1. Indoor unit
Type Cassette
Inverter heat pump
Model name AUXG36KRLB AUXG45KRLB AUXG54KRLB
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Capacity
Cooling
Rated kW 9.5 12.1 13.4
Btu/h 32,400 41,300 45,700
Min.—Max. kW 2.8—11.2 4.0—14.0 4.5—14.5
Btu/h 9,600—38,200 13,600—47,800 15,400—49,500
Heating
Rated kW 10.8 13.5 15.5
Btu/h 36,850 46,000 52,900
Min.—Max. kW 2.7—12.7 4.2—16.2 4.7—16.5
Btu/h 9,200—43,300 14,300—55,300 16,000—56,300
Input power
Cooling Rated
kW
2.91 3.61 4.41
Max. 4.19 5.00 5.23
Heating Rated 2.45 3.21 4.16
Max. 4.48 4.69 4.77
Current Cooling Rated A 5.6 6.8 8.0
Heating 4.8 6.1 7.6
Power factor Cooling %75.2 77.4 80.3
Heating 73.8 76.1 79.4
EER Cooling kW/kW 3.26 3.35 3.04
COP Heating 4.40 4.20 3.73
Moisture removal L/h (pints/h) 3.3 (5.8) 4.5 (7.9) 5.0 (8.8)
Maximum operating current *1 Cooling A10.5 14.0
Heating 10.5 14.0
Fan
Airflow rate
Cooling
HIGH
m3/h
1,870 2,000 2,100
MED 1,560 1,650 1,780
LOW 1,410 1,460 1,600
QUIET 1,160 1,300 1,320
Heating
HIGH 1,870 2,000 2,100
MED 1,560 1,650 1,780
LOW 1,410 1,460 1,600
QUIET 1,160 1,300 1,320
Type × Q'ty Turbo fan × 1
Motor output W 81
Sound pressure level *2
Cooling
HIGH
dB (A)
44 46 47
MED 41 42 43
LOW 38 39 40
QUIET 34 35 36
Heating
HIGH 44 46 47
MED 41 42 43
LOW 38 39 40
QUIET 34 35 36
Heat exchanger type
Dimensions (H × W × D) mm Main1: 252 × 2,131 × 13.3, Main2: 252 × 2,064 × 13.3, Main3: 252 × 1,999 × 13.3
Fin pitch Main 1: 1.3, Main 2: 1.3, Main 3: 1.3
Rows × Stages Main 1: 1 × 12, Main 2: 1 × 12, Main 3: 1 × 12
Pipe type Copper tube
Fin type Aluminum
Dimensions
(H × W × D)
Net mm 288 × 840 × 840
Gross 340 × 960 × 950
Weight Net kg 29
Gross 34
Connection pipe Size Liquid mm (in) Ø 9.52 (3/8)
Gas Ø 15.88 (5/8)
Method Flare
Drain hose Material PVC
Size mm Ø 25 (I.D.), Ø 32 (O.D.)
Operation range Cooling °C 18 to 32 %RH 80 or less
Heating °C 16 to 30
Cassette grille
(Option)
Model name UTG-UKYC-W
Material Polystyrene
Color White
Approximate color of MUNSELL N 9.25/
Dimensions
(H × W × D)
Net mm 53 × 950 × 950
Gross 110 × 1,000 × 1,010
Weight Net kg 6.0
Gross 10.0
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: 5.0 m, Height difference: 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.
• This data is based on EN 14511 standard.
1-1. Indoor unit - (01-1) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

Specifications for ErP Lot10
Model name AUXG36KRLB
Energy efficiency class Cooling A++
Heating (Average) A+
Pdesign Cooling kW 9.5 (35°C)
Heating (Average) 8.7 (-10°C)
SEER Cooling kWh/kWh 6.55
SCOP Heating (Average) 4.3
Annual energy consump-
tion
QCE kWh/a 507
QHE (Average) 2,828
Sound power level Cooling HIGH dB (A) 58
Heating 58
1-1. Indoor unit - (01-2) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

1-2. Outdoor unit
Type Inverter heat pump
Model name AOYG36KRTA
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Starting current A 5.6
Fan
Airflow rate Cooling m3/h 3,750
Heating 3,750
Type × Q'ty Propeller × 1
Motor output W 100
Sound pressure level *1 Cooling dB (A) 55
Heating 55
Sound power level Cooling dB (A) 70
Heating 70
Heat exchanger type
Dimensions
(H × W × D) mm
Main1: 756 × 905 × 18.20
Main2: 756 × 905 × 18.20
Fin pitch Main1: 1.45
Main2: 1.45
Rows × Stages Main1: 1 × 36
Main2: 1 × 36
Pipe type Copper
Fin Type (Material) Aluminum
Surface treatment Blue fin
Compressor Type DC twin rotary
Motor output W 1,500
Refrigerant Type (Global warming potential) R32 (675)
Factory charge g 1,900
Refrigerant oil Type FW68D
Amount cm3600
Enclosure
Material Steel sheet
Color Beige
Approximate color of Munsell 10YR 7.5/1.0
Dimensions
(H × W × D)
Net mm 788 × 940 × 320
Gross 966 × 1,027 × 445
Weight Net kg 53
Gross 62
Connection pipe
Size Liquid mm (in) Ø 9.52 (3/8)
Gas Ø 15.88 (5/8)
Method Flare
Pre-charge length
m
30
Max. length 50
Max. height difference 30
Operation range Cooling °C -15 to 46
Heating -15 to 24
Drain hose Material LDPE
Tip diameter mm Ø 13.0 (I. D.), Ø 16.0 to Ø 16.7 (O. D.)
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: 5.0 m, Height difference: 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.
• This data is based on EN 14511 standard.
1-2. Outdoor unit - (01-3) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

Type Inverter heat pump
Model name AOYG45KRTA AOYG54KRTA
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Starting current A 6.8 8.0
Fan
Airflow rate Cooling m3/h 4,450
Heating 4,450
Type × Q'ty Propeller × 1
Motor output W 120
Sound pressure level *1 Cooling dB (A) 57
Heating 57 59
Sound power level Cooling dB (A) 71 73
Heating 71 73
Heat exchanger type
Dimensions
(H × W × D)
mm
Main1: 966 × 905 × 18.20
Main2: 966 × 905 × 18.20
Sub: 966 × 543 × 18.20
Fin pitch
Main1: 1.45
Main2: 1.45
Sub: 1.45
Rows × Stages
Main1: 1 × 46
Main2: 1 × 46
Sub: 1 × 46
Pipe type Copper
Fin Type (Material) Aluminum
Surface treatment Blue fin
Compressor Type × Q'ty DC Twin rotary × 1
Motor output W 2,180
Refrigerant Type (Global warming potential) R32 (675)
Factory charge g 2,700
Refrigerant oil Type RmM68AF
Amount cm3800
Enclosure
Material Steel sheet
Color Beige
Approximate color of Munsell 10YR 7.5/1.0
Dimensions
(H × W × D)
Net mm 998 × 940 × 320
Gross 1,176 × 1,027 × 445
Weight Net kg 67
Gross 77
Connection pipe
Size Liquid mm (in) Ø 9.52 (3/8)
Gas Ø 15.88 (5/8)
Method Flare
Pre-charge length
m
30
Max. length 50
Max. height difference 30
Operation range Cooling °C -15 to 46
Heating -15 to 24
Drain hose Material LDPE
Tip diameter mm Ø 13.0 (I. D.), Ø 16.0 to Ø 16.7 (O. D.)
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: 5.0 m, Height difference: 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.
• This data is based on EN 14511 standard.
1-2. Outdoor unit - (01-4) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

2. Dimensions
2-1. Indoor unit
¢Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB
Unit: mm
796
342
950
View A
Hanging bolt position
Hanging bolt position
Indoor unit
Drain hose
View B View C
A
B
C
Ceiling
Wire hole
950
620
768
420
293
342 45 40
140
298
200 to 205
10
39
200 to 205
200
237
40 40
164
Fresh air inlet (cut out)
100
83
100
83
352
109
164
90
950
4 × Ø3.2
hole
Ø95
80
80
2-1. Indoor unit - (01-5) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢Installation space requirement
Unit: mm
Strong and durable ceiling
3,000 or more
1,800 to H2
1,000 or more
Floor
Obstruction
1,500 or moreH1
Model name H1: Attic height
AUXG36-54KRLB 298 or more
Be sure to make function setting with the remote controller according to the installed ceiling height.
H2: The maximum height from floor to ceiling
Ceiling height Model name
AUXG36-54KRLB
Standard 3,200
High ceiling 4,200
Installation notices
• When installing the indoor unit, be careful about the maintenance space.
• To set “3-direction”, Air outlet shutter plate (option) must be installed, and the “outlet-direction”
need to be switched to “3-way” by the remote controller.
100 or more
4 directions 3 directions
Piping position
• In 3-way outlet mode, changing of ceiling height setting by function setting 20 is prohibited. (Ceil-
ing height setting [function setting 20] is allowed to be changed only in 4-way outlet mode.)
• Use the Insulation kit for high humidity (option), when the condition under the roof is over 80% in
humidity and over 30°C in temperature. Otherwise, there is a risk of condensation on the ceiling.
2-1. Indoor unit - (01-6) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

•Human sensor (Option)
Drain
pipe
Refrigerant
pipe
Human
sensor
Top view
Example of sensitivity range:
3,200
800
8,800
Unit: mm
Equal sensitivity range of temperature Ceiling height 3,200 mm
Detecting position 800 mm from floor surface
NOTE: When the installation height gets higher, the temperature sensitivity decreases.
CAUTION
• Do not place large objects near the human sensor.
• Keep any other heating units outside the sensor’s detection area.
2-1. Indoor unit - (01-7) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit
¢Models: AOYG36KRTA
Unit: mm
Top view
Bottom view
Side viewFront view
940
3 Way valve
(Liquid)
786.2
23.4
12.9
129.1
85.3
50 95
29
296.2
265.7
Pipe port
(Gas valve)
3 Way valve
(Gas)
(Liquid valve)
Ф28: Cable port
Ф28: Cable port
89
650
35.748
143147
39.8
53.9: Liquid
40 320
354.8
62.9: Gas
320
139.8
Ф28: Cable port
Ф28: Cable port
96
50 120
Pipe port
5525
40 5
264.6
351.9
Pipe & Cable port
47.6
15.262.6
15.6
Rear view
50
Ф28: Cable port
Ф28: Cable port
25
141.9
70
67
Pipe port
2-2. Outdoor unit - (01-8) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢Models: AOYG45KRTA and AOYG54KRTA
Unit: mm
Top view
Bottom view
Side viewFront view
940
996.2
266.7
Pipe & Cable port
Rear view
Ф28: Cable port
Pipe port
650
35.748
143147
39.8
53.9 Liquid
40 320
354.8
62.9 Gas
12.9
297.2
(Gas valve)
(Liquid valve)
Ф28
Cable port
1-1/8
(29)
Pipe port
23.4
129.1
85.3
50
29
Pipe port
A
95
89
A
3 Way valve
(Liquid)
3 Way valve
(Gas)
320
139.8
96
40 5
Ф28
Cable port
120
Pipe port
55
25
50
B
B
50
25
141.9 70
67 Pipe port
264.6
351.9
47.6
15.262.6
15.6
2-2. Outdoor unit - (01-9) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit - (01-10) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2. TECHNICAL DATA AND PARTS LIST
2019.10.04
SR_CH02_AU014EF_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-UKYC-W ....................................................................................................02-2
3. Indoor unit parts list....................................................................................02-5
3-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB.........................................02-5
4. Outdoor unit parts list...............................................................................02-10
4-1. Model: AOYG36KRTA..................................................................................................02-10
4-2. Models: AOYG45KRTA and AOYG54KRTA ................................................................02-14
5. Accessories ...............................................................................................02-18
5-1. Indoor unit ....................................................................................................................02-18
5-2. Outdoor unit..................................................................................................................02-18
6. Optional parts ...........................................................................................02-19
6-1. Indoor unit ....................................................................................................................02-19
6-2. Outdoor unit..................................................................................................................02-22
7. Refrigerant system diagrams...................................................................02-23
7-1. Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA .....................................02-23
8. Wiring diagram ..........................................................................................02-24
8-1. Indoor unit ....................................................................................................................02-24
8-2. Outdoor unit..................................................................................................................02-25
9. PC board diagrams ...................................................................................02-26
9-1. Models: AUXG36KRLB, AUXG45KRLB, and AUXG54KRLB.......................................02-26
9-2. Models: AOYG36KRTA, AOYG45KRTA, and AOYG54KRTA .....................................02-27

1. Precautions
When 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.
• Work
– Prior to beginning work on systems containing flammable refrigerants, safety checks are nec-
essary to ensure that the risk of ignition is minimized. When repairing the refrigerant system,
refer to the precautions written in the installation manual of the products before you start ser-
vicing.
– Work shall be undertaken under a controlled procedure so as to minimize the risk of a
flammable gas or vapor being present while the work is being performed.
– All maintenance staff and others working in the local area shall be instructed on the nature of
work being carried out.
– Work in confined spaces shall be avoided.
– The area around the workspace shall be sectioned off.
– Ensure that the conditions within the area have been made safe by control of flammable ma-
terial.
– 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.
• Checking for presence of refrigerant
– The area shall be checked with an appropriate refrigerant detector prior to and during work, to
ensure the technician is aware of potentially flammable atmospheres.
– Ensure that the leak detection equipment being used is suitable for use with flammable refrig-
erants, i.e. non-sparking, adequately sealed or intrinsically safe.
• 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-UKYC-W
¢Intake grille
1
4
23
Long Life Filter
Intake Grille Assy
Filter Guide
Hook Wire
9378252028
9381691005
9378253018
9378597020
Parts No.
Description
Ref
No.
4
1
2
3
2-1. Model: UTG-UKYC-W - (02-2) - 2. Cassette grille (optional part) parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST