Fujitsu ABHG54KRTA User manual

AIR CONDITIONER
Ceiling type
SERVICE MANUAL
INDOOR
ABHG54KRTA
OUTDOOR
AOHG54KRTA
SR_AB007EG_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 © 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
2020.04.16
SR_CH01_AB007EG_01

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

1. Specifications
1-1. Indoor unit
Type Ceiling
Inverter heat pump
Model name ABHG54KRTA
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Capacity
Cooling
Rated kW 13.4
Btu/h 45,700
Min.—Max. kW 4.5—14.5
Btu/h 15,350—49,400
Heating
Rated kW 15.5
Btu/h 52,900
Min.—Max. kW 4.7—16.5
Btu/h 16,040—56,310
Input power
Cooling Rated
kW
4.45
Max. 5.23
Heating Rated 4.43
Max. 4.83
Current Cooling Rated A 8.0
Heating 8.0
EER Cooling kW/kW 3.01
COP Heating 3.50
Power factor Cooling %80.5
Heating 80.4
Moisture removal L/h (pints/h) 5.0 (8.8)
Maximum operating current *1Cooling A14.0
Heating 14.0
Fan
Airflow rate
Cooling
HIGH
m3/h
2,100
MED 1,700
LOW 1,500
QUIET 1,220
Heating
HIGH 2,100
MED 1,700
LOW 1,500
QUIET 1,220
Type × Q'ty Sirocco × 4
Motor output W 130
Sound pressure level *2
Cooling
HIGH
dB (A)
48
MED 44
LOW 41
QUIET 38
Heating
HIGH 48
MED 44
LOW 41
QUIET 38
Heat exchanger type
Dimensions (H × W × D) mm 294 × 1,335 × 39.9
Fin pitch mm 1.30
Rows × Stages 3 × 14
Pipe type Copper
Fin type Aluminum
Enclosure
Material Steel sheet
Color White
Approximate color of Munsell N9.25/
Dimensions
(H × W × D)
Net mm 235 × 1,700 × 705
Gross 330 × 1,785 × 825
Weight Net kg 38
Gross 48
Connection pipe Size Liquid mm (in) Ø9.52 (Ø3/8) Gas Ø15.88 (Ø5/8)
Method Flare
Drain hose Material PVC
Tip diameter mm Ø25 (I.D.), Ø32 (O.D.)
Operation range Cooling °C 18 to 32
%RH 80 or less
Heating °C 16 to 30
Remote controller (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 m, Height difference: 0 m. (Between outdoor unit and indoor unit.)
• Protective function might work when using it outside the operation range.
• *1: Maximum current is maximum value when operated within the operation range.
• *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.
1-1. Indoor unit - (01-1) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

1-2. Outdoor unit
Type Inverter heat pump
Model name AOHG54KRTA
Power supply 3N 400 V ~ 50 Hz
Power supply intake Outdoor unit
Available voltage range 342—457 V
Starting current A 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 59
Sound power level Cooling dB (A) 73
Heating 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 DC Twin rotary
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.
1-2. Outdoor unit - (01-2) - 1. Specifications
GENERAL INFORMATION GENERAL INFORMATION

2. Dimensions
2-1. Indoor unit
¢Model: ABHG54KRTA
Unit: mm
Top viewSide view
Rear view
Suspension bolt pitch
1,543
Indoor unit (Top view)
Indoor unit
Dimensions
(Space required for installation)
The length of the bolt
here is 30 mm.
75
10
175290
75
49 84
55
110
1,543
1,700
705
206
179
115
41
125 103
349
119
145
181
98
313
89
235
100
125
91
80140
290178
ø100-mm hole
89
110
2-1. Indoor unit - (01-3) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

¢Installation space requirement
Unit: mm
Ceiling
Ceiling
30 or more
2,500 or more
1,000 or more
200 or more
0 or more
Obstruction
Floor
Indoor unit
Required ceiling height varies according to the ceiling mode setting of function setting No. 20.
Ceiling height (m)
Ceiling mode Standard High ceiling
54 model 3.5 4.3
2-1. Indoor unit - (01-4) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit
¢Model: AOHG54KRTA
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 - (01-5) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2-2. Outdoor unit - (01-6) - 2. Dimensions
GENERAL INFORMATION GENERAL INFORMATION

2. TECHNICAL DATA AND PARTS LIST
2020.11.16
SR_CH02_AB007EG_02

CONTENTS
2. TECHNICAL DATA AND PARTS LIST
1. Precautions..................................................................................................02-1
2. Indoor unit parts list....................................................................................02-2
2-1. Model: ABHG54KRTA ....................................................................................................02-2
3. Outdoor unit parts list.................................................................................02-4
3-1. Model: AOHG54KRTA....................................................................................................02-4
4. Accessories .................................................................................................02-8
4-1. Indoor unit ......................................................................................................................02-8
4-2. Outdoor unit....................................................................................................................02-8
5. Optional parts .............................................................................................02-9
5-1. Indoor unit ......................................................................................................................02-9
6. Refrigerant system diagrams...................................................................02-12
6-1. Model: AOHG54KRTA..................................................................................................02-12
7. Wiring diagrams ........................................................................................02-13
7-1. Indoor unit ....................................................................................................................02-13
7-2. Outdoor unit..................................................................................................................02-14
8. PC board diagrams ...................................................................................02-15
8-1. Model: ABHG54KRTA ..................................................................................................02-15
8-2. Model: AOHG54KRTA..................................................................................................02-16

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. Indoor unit parts list
2-1. Model: ABHG54KRTA
¢Chassis
11
17
16
15
9
13
14
20
21
18
24
25
19
23
22
26
10
8
7
7
5
6
4
4
4
4
6
5
29
28
27
12
30
31 3
10
10
10
6
6
1
2
1
2
2-1. Model: ABHG54KRTA - (02-2) - 2. Indoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

Item no. Part no. Part name Service part
1 9384321008 Intake grille A sub assy ♦
2 9383344008 Grille hinge (3 pcs.) ♦
3 9383342004 Air filter A ♦
4 9384307002 Casing U assy ♦
5 9357921006 Bearing B assy ♦
6 9384110008 Sirocco fan assy ♦
7 9383443008 Rubber (Vibration proof) ♦
8 9603857011 Brushless DC motor ♦
9 9384236005 Motor mount assy ♦
10 9384311009 Casing B assy ♦
11 9352173011 Cap (Power) ♦
12 9383406003 Side panel L ♦
13 9384308009 Top panel cover assy (4-fan) ♦
14 9384144003 Flap assy (4-fan) ♦
15 9384324009 Hose sub assy ♦
16 9383384004 L and R louver ♦
17 9383385001 Base (Louver) ♦
18 9900896027 Terminal (5P) ♦
19 9711524065 Main PCB ♦
20 9384312006 Box (Gear) sub assy ♦
21 9900960049 Thermistor (Room) ♦
22 9710661037 Power supply PCB ♦
23 9710019005 2-way remote PCB ♦
24 9306489045 Terminal (3P) ♦
25 9707457056 Reactor assy ♦
26 9384320001 Side panel R sub assy ♦
27 9900892029 Thermistor (Pipe) ♦
28 9384287007 Evaporator total assy ♦
29 9384364005 Drain pan total assy (4-fan) ♦
30 9358746004 Drain cap ♦
31 9384241009 Front panel (4-fan) assy ♦
2-1. Model: ABHG54KRTA - (02-3) - 2. Indoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

3. Outdoor unit parts list
3-1. Model: AOHG54KRTA
¢Exterior parts and chassis
15
6
9
12
7
2
1
8
16
22
17
18
14
13
25
26
19
23
24
a
b
11
10
4
5
3
3
20 21
3-1. Model: AOHG54KRTA - (02-4) - 3. Outdoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

Item no. Part no. Part name Service part
1 9383880001 Top panel assy ♦
2 9381013005 Protective net ♦
3 9375361013 Net rubber ♦
4 9900984038 Thermistor (Heat exchanger) ♦
5 9900727154 Thermistor assy ♦
6 9383607004 Thermo holder ♦
7 9383874017 Right panel sub assy ♦
8 9383879005 Rear pipe cover ♦
9 9711424013 Inverter PCB ♦
10 9900634025 Reactor assy ♦
11 9901053016 Terminal ♦
12 9711431097 Main PCB (Service) (for 45 model) ♦
9711431103 Main PCB (Service) (for 54 model) ♦
13 313166024302 Drain cap ♦
14 9303029015 Drain assy ♦
15 9350255009 Base assy (Service) ♦
16 9383876011 Service panel sub assy ♦
17 9383878008 Front pipe cover ♦
18 9372171059 Emblem rear ♦
19 9383863011 Front panel assy ♦
20 9383604003 Blow grille ♦
21 9383689000 Blow grille insulation ♦
22 9383882012 Left panel sub assy ♦
23 9383336003 Propeller fan ♦
24 9603733018 Brushless motor ♦
25 9383862014 Motor bracket assy ♦
26 9374420605 Condenser sub assy ♦
a— Separate wall assy —
b— Control box unit —
3-1. Model: AOHG54KRTA - (02-5) - 3. Outdoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST

¢Compressor
58
57
53
60
63
59
b
50
52
A
c
A
61
51
55
a
54
56
B
B
62
3-1. Model: AOHG54KRTA - (02-6) - 3. Outdoor unit parts list
TECHNICAL DATA AND PARTS LIST TECHNICAL DATA AND PARTS LIST