Fujitsu ARXG45KMLA User manual

AIR CONDITIONER
Duct type
SERVICE MANUAL
INDOOR
ARXG36KMLA
ARXG45KMLA
OUTDOOR
AOYG36KRTA AOYG45KRTA
SR_AR014EF_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_AR014EF_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....................................................................................................................01-7

1. Specifications
1-1. Indoor unit
Type Inverter heat pump
Model name ARXG36KMLA ARXG45KMLA
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Capacity
Cooling
Rated k→ 9.5 12.1
Btu/h 32,400 41,300
Min.—Max. k→ 2.8—11.2 4.0—13.0
Btu/h 9,600—38,200 13,600—44,300
Heating
Rated k→ 10.8 13.5
Btu/h 36,900 46,100
Min.—Max. k→ 2.7—12.7 4.2—15.2
Btu/h 9,200—43,300 14,300—51,800
Input power
Cooling Rated
k→
2.97 4.22
Max. 4.29 5.03
Heating Rated 2.88 3.84
Max. 4.66 4.79
Current Cooling Rated A 5.7 7.7
Heating 5.6 7.1
Power factor Cooling %75.4 79.6
Heating 75.1 78.2
EER Cooling k→/k→ 3.20 2.87
COP Heating 3.75 3.52
Moisture removal L/h (pints/h) 3.0 (5.3) 4.0 (7.0)
Maximum operating current *1 Cooling A10.5 14.0
Heating 10.5 14.0
Fan
Airflow rate
Cooling
HIGH
m3/h
1,900 2,100
MED 1,620 1,750
LO→ 1,270 1,350
QUIET 980 1,070
Heating
HIGH 2,100
MED 1,620 1,750
LO→ 1,270 1,350
QUIET 980 1,070
Type × Q'ty Sirocco × 2
Motor output → 197
Static pressure range Pa 30 to 150
Sound pressure level *2
Cooling
HIGH
dB (A)
39 42
MED 35 38
LO→ 30 32
QUIET 26 28
Heating
HIGH 42 42
MED 35 38
LO→ 30 32
QUIET 26 28
Sound power level Cooling HIGH dB (A) 65 68
Heating 70 70
Heat exchanger type
Dimensions (H × → × D) mm 294 × 1,000 × 39.9 294 × 1,000 × 53.2
Fin pitch 1.40
Rows × Stages 3 × 14 4 × 14
Pipe type Copper
Fin type Aluminum
Enclosure Material Steel sheet
Color —
Dimensions
(H × → × D)
Net mm 270 × 1,135 × 700
Gross 300 × 1,320 × 790
→eight Net kg 38 39
Gross 45 47
Connection pipe Size Liquid mm (in) Ø9.52 (3/8) Gas Ø15.88 (5/8)
Method Flare
Drain port Material Steel
Tip diameter mm Ø35.7 (I.D.), Ø38.1 (O.D.)
Operation range Cooling °C 18 to 32 %RH 80 or less
Heating °C 16 to 30
Remote control (Option) →ired remote controller, →ireless remote controller, Mobile app*3 (FGLair™)
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 27 °CDB/19 °C→B, and outdoor temperature of 35 °CDB/24 °C→B.
– Heating: Indoor temperature of 20 °CDB/15 °C→B, and outdoor temperature of 7 °CDB/6 °C→B.
– Standard static pressure; 36 type: 47 Pa, 45 type: 60 Pa
– Pipe length: 5 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 →LAN 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 ARXG36KMLA
Energy efficiency class Cooling A++
Heating (Average) A+
Pdesign Cooling k→ 9.5 (35°C)
Heating (Average) 8.7 (-10°C)
SEER Cooling k→h/k→h 6.10
SCOP Heating (Average) 4.00
Annual energy consumption QCE k→h/a 545
QHE (Average) 3,044
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 5.7
Fan
Airflow rate Cooling m3/h 3,750
Heating 3,750
Type × Q'ty Propeller × 1
Motor output → 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 × → × 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 → 1,500
Refrigerant Type (Global warming potential) R32 (675)
Factory charge g 1,900
Refrigerant oil Type F→68D
Amount cm3600
Enclosure
Material Steel sheet
Color Beige
Approximate color of Munsell 10YR 7.5/1.0
Dimensions
(H × → × D)
Net mm 788 × 940 × 320
Gross 966 × 1,027 × 445
→eight 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 °C→B, and outdoor temperature of 35 °CDB/24 °C→B.
– Heating: Indoor temperature of 20 °CDB/15 °C→B, and outdoor temperature of 7 °CDB/6 °C→B.
– 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
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Starting current A 7.7
Fan
Airflow rate Cooling m3/h 4,450
Heating 4,450
Type × Q'ty Propeller × 1
Motor output → 120
Sound pressure level *1 Cooling dB (A) 57
Heating 57
Sound power level Cooling dB (A) 71
Heating 71
Heat exchanger type
Dimensions
(H × → × 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 DC twin rotary
Motor output → 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 × → × D)
Net mm 998 × 940 × 320
Gross 1,176 × 1,027 × 445
→eight 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 16.8 (O. D.)
NOTES:
• Specifications are based on the following conditions:
– Cooling: Indoor temperature of 27 °CDB/19 °C→B, and outdoor temperature of 35 °CDB/24 °C→B.
– Heating: Indoor temperature of 20 °CDB/15 °C→B, and outdoor temperature of 7 °CDB/6 °C→B.
– 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: ARXG36KMLA and ARXG45KMLA
Front view
Top viewSide view (L) Side view (R)
Rear view
Gas pipe
Liquid pipe
Drain port
Drain port
Knockout
for fresh air
Unit: mm
138
138
P125 × 3 = 375
Φ3.2
8080
Φ205
75
82
8080
264
Φ3.2
264264
270
240
121
80 80
32
161
80 80
Φ200
40 700
173 477
73
107
1,135
1,015
120
1,177
Φ5 P125 × 3 = 375
Φ5
16
34
270
240
170
32
66
114
281
240
168
283
39
54
Air
2-1. Indoor unit - (01-5) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢Installation space requirement
Provide sufficient installation space for product safety.
Models: ARXG36KMLA and ARXG45KMLA
Unit: mm
150 or more300 or more
Floor
2,500 or more
(When no ceiling)
2-1. Indoor unit - (01-6) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit
¢Model: 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 - (01-7) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢Model: AOYG45KRTA
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 - (01-8) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2. TECHNICAL DATA AND PARTS LIST
2020.11.16
SR_CH02_AR014EF_03

CONTENTS
2. TECHNICAL DATA AND PARTS LIST
1. Precautions..................................................................................................02-1
2. Indoor unit parts list....................................................................................02-2
2-1. Models: AR↓G36KMLA and AR↓G45KMLA ..................................................................02-2
3. Outdoor unit parts list.................................................................................02-8
3-1. Model: AOYG36KRTA....................................................................................................02-8
3-2. Model: AOYG45KRTA..................................................................................................02-12
4. Accessories ...............................................................................................02-16
4-1. Indoor unit ....................................................................................................................02-16
4-2. Outdoor unit..................................................................................................................02-16
5. Optional parts ...........................................................................................02-17
5-1. Indoor unit ....................................................................................................................02-17
5-2. Optional parts ...............................................................................................................02-19
6. Refrigerant system diagrams...................................................................02-20
6-1. Models: AOYG36KRTA and AOYG45KRTA ................................................................02-20
7. Wiring diagrams ........................................................................................02-21
7-1. Indoor unit ....................................................................................................................02-21
7-2. Outdoor unit..................................................................................................................02-22
8. PC board diagrams ...................................................................................02-23
8-1. Models: AR↓G36KMLA and AR↓G45KMLA ................................................................02-23
8-2. Models: AOYG36KRTA and AOYG45KRTA ................................................................02-24

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
– Prior to beginning work on systems containing flammable refrigerants, safety checks are nec-
essary to ensure that the risk of ignition is minimized. →hen repairing the refrigerant system,
refer to the precautions written in the installation manual of the products before you start ser-
vicing.
– →ork 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.
– →ork 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. Indoor unit parts list
2-1. Models: ARXG36KMLA and ARXG45KMLA
¢Thermistors
Hook metal
Ref. Description Part number
1
2
1 Room thermistor 9900826048
2 Pipe thermistor 9900942045
2-1. Models: AR↓G36KMLA and AR↓G45KMLA - (02-2) - 2. Indoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

¢Main PC board
15
14
11
15
11 Main PCB (24KMLA)
15 Terminal 3P 9306489045
16 Terminal 5P 9900896003
13 Communication PCB 9710019005
12 Holder 0600063023
14 Power supply PCB 9710661013
17 Reactor assy 9707457049
Ref. Description Part number
9710624223
11 Main PCB (36KMLA) 9710624247
11 Main PCB (30KMLA) 9710624230
11 Main PCB (45KMLA) 9710624254 13
16
12
2-1. Models: AR↓G36KMLA and AR↓G45KMLA - (02-3) - 2. Indoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

¢Evaporator
22
21
22 Evaporator Total Assy (24KMLA)
21 Drain pan sub assy
Main panel sub assy
Ref. Description Part number
Bracket pipe sub assy
9374517978
22 Evaporator Total Assy (30, 36KMLA) 9383816048
22 Evaporator Total Assy (45KMLA) 9383816031
9374513017
2-1. Models: AR↓G36KMLA and AR↓G45KMLA - (02-4) - 2. Indoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST