Fujitsu Split Type Room Air Conditioner

Floor Console / Under Ceiling Dual Type

Models Covered:

Indoor Units: ABY18FBBJ, ABY18UBBJ, ABY24FBBJ, ABY24UBBJ

Outdoor Units: AOY18FNBK, AOY18FNBN, AOY18UNBKL, AOY18UNBNL, AOY24FNBK, AOY24FNBN, AOY24UNBKL, AOY24UNBNL

Specifications

Feature	ABY18FBBJ / AOY18FNBK, AOY18FNBN	ABY24FBBJ / AOY24FNBK, AOY24FNBN
Cooling Capacity	5.40 kW	6.50 kW
Heating Capacity	6.00 kW	7.40 kW
Power Source	230 V	230 V
Frequency	50 Hz	50 Hz
Running Current (Cooling)	8.6 A	10.8 A
Running Current (Heating)	8.3 A	10.3 A
Input Watts (Cooling)	1.90 kW	2.42 kW
Input Watts (Heating)	1.85 kW	2.30 kW
E.E.R. (Cooling)	2.84 kW/kW	2.69 kW/kW
E.E.R. (Heating)	3.24 kW/kW	3.22 kW/kW
Moisture Removal	2.0 l/hr	2.5 l/hr
Air Circulation (High)	780 m³/hr	880 m³/hr

Feature	ABY18FBBJ / AOY18FNBK, AOY18FNBN	ABY24FBBJ / AOY24FNBK, AOY24FNBN
Compressor Type	Hermetic type, Deposit electrode condenser, 2 poles, Single phase, Induction motor, Rotary
Discrimination	5KS225DAC	5JS290DAA
Refrigerant	R410A, 900 g	R410A, 1,550 g

Feature	ABY18FBBJ / AOY18FNBK, AOY18FNBN	ABY24FBBJ / AOY24FNBK, AOY24FNBN
Fan Motor Power Source	230 V	230 V
Indoor Unit Fan Speed (High)	1,030 r.p.m.	1,180 r.p.m.
Indoor Unit Fan Speed (Med)	890 r.p.m.	1,040 r.p.m.
Indoor Unit Fan Speed (Low)	770 r.p.m.	900 r.p.m.
Outdoor Unit Fan Speed (High)	MFB-24JTT, 780 r.p.m.	MFB-24JTT, 780 r.p.m.

Dimension	Indoor Unit (H x W x D)	Outdoor Unit (H x W x D)
Dimensions (mm)	199 x 990 x 655	650 x 830 x 320

Weight	Indoor Unit (Gross/Net)	Outdoor Unit (Gross/Net)
Weight (kg)	37 kg / 28 kg	51 kg / 47 kg

Refrigerant Charge (R410A)	Indoor Unit (900 g)	Outdoor Unit (1,550 g)
Pipe Length 7.5 m (25 ft)	900 g (31.8oz)	1,550 g (54.7oz)
Full Charge Amount 10 m (33 ft)	950 g (33.5oz)	1,600 g (56.4oz)
Full Charge Amount 15 m (49 ft)	1,050 g (37.0oz)	1,700 g (60.0oz)
Full Charge Amount 20 m (66 ft)	1,150 g (40.6oz)	1,800 g (63.5oz)
Additional Refrigerant	20 g/m (0.71oz / 3.3ft)	(Not specified for outdoor unit in this table, but implied by model differences)

Specifications (Cool and Heat Models)

Feature	ABY18UBBJ / AOY18UNBKL, AOY18UNBNL	ABY24UBBJ / AOY24UNBKL, AOY24UNBNL
Cooling Capacity	5.40 kW	6.50 kW
Heating Capacity	6.00 kW	7.40 kW
Running Current (Cooling)	8.6 A	10.8 A
Running Current (Heating)	8.3 A	10.3 A
Input Watts (Cooling)	1.90 kW	2.42 kW
Input Watts (Heating)	1.85 kW	2.30 kW
E.E.R. (Cooling)	2.84 kW/kW	2.69 kW/kW
E.E.R. (Heating)	3.24 kW/kW	3.22 kW/kW
Air Circulation (High)	780 m³/hr	880 m³/hr
Compressor Discrimination	5KS225DAC	5JS290DAA
Refrigerant	R410A, 1,550 g	R410A, 1,700 g
Indoor Unit Fan Speed (High)	1,030 r.p.m.	1,180 r.p.m.
Indoor Unit Fan Speed (Med)	890 r.p.m.	1,040 r.p.m.
Indoor Unit Fan Speed (Low)	770 r.p.m.	900 r.p.m.
Outdoor Unit Fan Speed (High)	MFB-24JTBT, 780 r.p.m.	MFB-24JTBT, 780 r.p.m.
Outdoor Unit Fan Speed (Low)	400 r.p.m.	400 r.p.m.
Weight (kg) (Gross/Net)	Indoor: 37 kg / 28 kg	Indoor: 37 kg / 28 kg
	Outdoor: 56 kg / 52 kg	Outdoor: 63 kg / 59 kg
Refrigerant Charge (R410A)	Pipe Length 7.5 m (25 ft): 1,550 g (54.7oz)	Pipe Length 7.5 m (25 ft): 1,700 g (60.0oz)
Full Charge Amount	10 m (33 ft): 1,600 g (54.6oz)	10 m (33 ft): 1,800 g (63.5oz)
	15 m (49 ft): 1,700 g (60.0oz)	15 m (49 ft): 2,000 g (70.6oz)
	20 m (66 ft): 1,800 g (63.5oz)	20 m (66 ft): 2,200 g (77.6oz)
Additional Refrigerant	20 g/m (0.71oz / 3.3ft)	40 g/m (1.42oz / 3.3ft)

Outline and Dimensions

Indoor Unit

Front View: Shows dimensions of 990 mm (width) x 655 mm (height) x 199 mm (depth).

Rear View: Shows dimensions of 900 mm (width) and various internal vertical measurements: 175 mm, 200 mm, 530 mm. Also indicates a depth of 500 mm.

Outdoor Unit

Top View: Shows dimensions of 830 mm (width) x 350 mm (depth) x 320 mm (height).

Side View: Shows dimensions of 320 mm (depth) x 650 mm (height) x 12 mm (width of a specific component).

Bottom View: Shows the unit with an indication of 'Air flow' direction.

Refrigerant System Diagram

Illustrates the refrigerant flow for different model series:

Models ABY18FBBJ / AOY18FNBK & ABY18FBBJ / AOY18FNBN: Shows an Indoor Unit with an Evaporator and an Outdoor Unit with a Compressor, Condenser, Strainer, and Capillary tube. Refrigerant pipes are Ø 6.35 mm (1/4") and Ø 15.88 mm (5/8"). Includes a Charging valve.
Models ABY24FBBJ / AOY24FNBK & ABY24FBBJ / AOY24FNBN: Similar to the above, but uses refrigerant pipes of Ø 9.52 mm (3/8") and Ø 15.88 mm (5/8").
Models ABY18UBBJ / AOY18UNBKL & ABY18UBBJ / AOY18UNBNL: Includes a 4-Way valve in the outdoor unit system. Uses refrigerant pipes of Ø 6.35 mm (1/4") and Ø 15.88 mm (5/8").
Models ABY24UBBJ / AOY24UNBKL & ABY24UBBJ / AOY24UNBNL: Includes a 4-Way valve, Accumulator, and Distributor in the outdoor unit system. Uses refrigerant pipes of Ø 9.52 mm (3/8") and Ø 15.88 mm (5/8").

Key: Cooling is indicated by solid arrows, Heating by dashed arrows, and Flare coupling by double-headed arrows.

Circuit Diagram

Provides schematic diagrams for the Indoor and Outdoor units, detailing electrical connections.

Indoor Unit Components:

Thermistors (Room Temperature, Pipe Temperature)
Indicator PCB Assy
Controller PCB Assy
Fan Motor (FM)
Step Motors (Up/Down, Left/Right)
Power Supply PCB Assy
Power Relay
Various connectors (CN1, CN4, CN5, CN7, CN8, CN10, CN11, CN12, CN13, CN14, CN201)

Outdoor Unit Components:

Compressor
Compressor Capacitor
Fan Motor
Fan Motor Capacitor
Thermal Protector
Fuse (5A)
4-Way Valve Coil
S.V. Valve Coil

The diagrams show power source connections, internal wiring, and connections between major components.

Indoor PCB Circuit Diagram

Details the internal circuitry of the Indoor Unit's Printed Circuit Board (PCB). It includes:

Microcontroller (uPD780058BGC)
Power supply components (switching transformer, regulators, capacitors, resistors)
Driver ICs (uPA2003GR)
Memory IC (BR93LC46RF)
Relays (G5S-1, G3MC-201PL-VD)
Switches (AUTO RESTART, MANUAL AUTO SWITCH)
Indicators (LEDs for OPERATE, TIMER, LOUVER)
Connectors for sensors, motors, and displays.

Error Display

This section describes how the OPERATION, TIMER, and SWING lamps indicate different error conditions. Errors are identified by content (e.g., 'Indoor unit circuit board error', 'Indoor unit fan error') and the display shows lamp flashing patterns (fast flashing, slow flashing, or off) for each error.

Error Contents	Operation (Red)	Timer (Green)	Swing (Orange)
Indoor unit circuit board error	○ (Fast flashing)	○ (Fast flashing)	- (Off)
Indoor unit room temperature sensor wire opened	● (Slow flashing) 2 times	○ (Fast flashing)	- (Off)
Indoor unit room temperature sensor wire short circuited	● (Slow flashing) 2 times	○ (Fast flashing)	○ (Fast flashing)
Indoor unit piping sensor wire opened	● (Slow flashing) 3 times	○ (Fast flashing)	- (Off)
Indoor unit piping sensor wire short circuited	● (Slow flashing) 3 times	○ (Fast flashing)	○ (Fast flashing)
Indoor unit fan error	● (Slow flashing) 6 times	○ (Fast flashing)	- (Off)

Disassembly Illustrations

These sections provide exploded view diagrams for the Indoor Unit and Outdoor Unit, detailing the assembly of various components. They are intended for service and repair purposes, showing the order and arrangement of parts with reference numbers that correspond to the Parts List.

Indoor Unit Disassembly: Covers the main casing, fan assemblies, control boards, and other internal components.
Outdoor Unit Disassembly: Shows the breakdown of the compressor, condenser, fan, and associated piping and electrical parts.

Parts List

Detailed lists of all parts used in the Indoor and Outdoor units, including reference numbers, descriptions, and part numbers for specific models.

Indoor Unit Parts:

Ref. No.	Description	Part Number (ABY18FBBJ)	Part Number (ABY18UBBJ)	Part Number (ABY24FBBJ)	Part Number (ABY24UBBJ)
8-1	Air Filter	9358567029	9358567029	9358567029	9358567029
34	Capacitor (Fan Motor)	9703306044	9703306044	9703306044	9703306044
36-2	Cord Holder Metal	9356362008	9356362008	9356362008	9356362008
56	Sirocco Fan Assy	9385258006	9385258006	9385258006	9385258006
67	Rubber (Vibration-proof)	9385102002	9385102002	9385102002	9385102002
69	Louver	9358561010	9358561010	9358561010	9358561010
68	Cap	9358563007	9358563007	9358563007	9358563007
108	Base Assy	9359061038	9359061038	9359061038	9359061038
109	Casing	9358543009	9358543009	9358543009	9358543009
124	Kit (Dew Proof Plate Sub Assy)	9372673010	9372673010	9372673010	9372673010
126	Motor Fixing Table Assy	9358591000	9358591000	9358591000	9358591000
127	Drain Hose Assy	9359242000	9359242000	9359242000	9359242000
138	Kit (Separate Wall A Sub Assy)	9372666012	9372666012	9372666012	9372666012
146	Evaporator Assy	9362513081	9362513081	9362513081	9362513081
160	Drain Pan Assy	9358568002	9358568002	9358568002	9358568002
164	Fan Motor Assy-IN	MFA-18JTT (9601527022) / MFA-24JTT (9601527015)	MFA-18JTT (9601527022) / MFA-24JTT (9601527015)	MFA-18JTT (9601527022) / MFA-24JTT (9601527015)	MFA-18JTT (9601527022) / MFA-24JTT (9601527015)
173	Hanger Bracket-L	9358596005	9358596005	9358596005	9358596005
174	Hanger Bracket-R	9358595008	9358595008	9358595008	9358595008
184-1	Thermistor Spring-A	313728262708	313728262708	313728262708	313728262708
187	Clamp No. 1219	313361271706	313361271706	313361271706	313361271706
195	Clamp SKB-100	313361275805	313361275805	313361275805	313361275805
196-1	Clamp SKB-3M	312300787605	312300787605	312300787605	312300787605
210	Main Relay	9353611017	-	9353611017	-
211	Cushion Rubber	313806328306	-	313806328306	-
223	Control Box	9358600016	9358600016	9358600016	9358600016
234	Thermistor Assy-Room	9703299087	9703299087	9703299087	9703299087
235	Thermistor Assy-Pipe	9900022020	9900022020	9900022020	9900022020
236	Controller PCB Assy	9704557216 (EZ-002YWSE-C)	9704557223 (EZ-00211HSE-C)	9704557131 (EZ-002TWSE-C)	9704557148 (EZ-00210HSE-C)
240	Remote Control AR-JW1	9371190013	-	9371190013	-
320	Flap (Upper)-F	9358538012	9358538012	9358538012	9358538012
321	Kit (Flap (Lower) Sub Assy)	9372671016	9372671016	9372671016	9372671016
338	Motor Fixture	9358594001	9358594001	9358594001	9358594001
361	Bushing	9357942001	9357942001	9357942001	9357942001
361-2	Bushing-B, Plastic	9358554005	9358554005	9358554005	9358554005
361-3	Bushing-C, Plastic	9358553008	9358553008	9358553008	9358553008
365-1	Special Screw	9359092001	9359092001	9359092001	9359092001
365-2	Special Screw	9359091004	9359091004	9359091004	9359091004
381	Locking Spacer, KGLS-4S	313209391506	313209391506	313209391506	313209391506
385	Indicator PCB Assy	9701873012	9701873012	9701873012	9701873012
407	Motor Rod	9358560006	9358560006	9358560006	9358560006
408	Louver Link	9358556009	9358556009	9358556009	9358556009
416	Insulation (Panel)-A	9358574003	9358574003	9358574003	9358574003
417	Insulation (Panel)-B	9358914007	9358914007	9358914007	9358914007
418	Insulation (Flap Base)	9358572009	9358572009	9358572009	9358572009
422	Clamp NK-10N	9359183006	9359183006	9359183006	9359183006
443	Arm Bracket	9359281009	9359281009	9359281009	9359281009
470	Kit (Separate Wall B Sub Assy)	9373448013	9373448013	9373448013	9373448013
472	Grille Support	9358602003	9358602003	9358602003	9358602003
473	Filter Bracket	9358607008	9358607008	9358607008	9358607008
488	Grill-F	9358532010	9358532010	9358532010	9358532010
500	Protect Cover	9358564004	9358564004	9358564004	9358564004
502	Support Stay	9358599006	9358599006	9358599006	9358599006
503	Louver Shaft	9358557006	9358557006	9358557006	9358557006
505	Louver Stopper	9358555002	9358555002	9358555002	9358555002
506	Louver Rod	9358559000	9358559000	9358559000	9358559000
508	Cosmetic Panel-R	9358535011	9358535011	9358535011	9358535011
509	Cosmetic Panel-L	9358536018	9358536018	9358536018	9358536018
514	Control Box Cover	9359097006	9359097006	9359097006	9359097006
520	Flap Base	9358537015	9358537015	9358537015	9358537015
521	Louver Link Cover	9358558003	9358558003	9358558003	9358558003
554	Flap Link-Upper (Step Motor-V)	9358551004	9358551004	9358551004	9358551004
555	Flap Link-Lower (Step Motor-V)	9358552001	9358552001	9358552001	9358552001
558	Motor Rod-A (Step Motor-V)	9358550007	9358550007	9358550007	9358550007
577	Catch TL-119	9359096009	9359096009	9359096009	9359096009
578	Base Bracket (Reinforcement)	9358586006	9358586006	9358586006	9358586006
580	Top Cover	9358534014	9358534014	9358534014	9358534014
581	Protector, Metal (Fan Motor)	9359282006	9359282006	9359282006	9359282006
625	Cord Bushing KR-51	9359240006	9359240006	9359240006	9359240006
628	Locking Spacer-B	313005446558	313005446558	313005446558	313005446558
652-1	Thermistor Holder Pipe	313806262805	313806262805	313806262805	313806262805
653-2	Bolt	0700190018	0700190018	0700190018	0700190018
684	Motor Base	9358562000	9358562000	9358562000	9358562000
731-2	Holder (Guide Rail)	0600241018	0600241018	0600241018	0600241018
743	Remote Control Holder	9305642014	9305642014	9305642014	9305642014
755	Casing Cover	9358544006	9358544006	9358544006	9358544006
764	Drain Cap	9358746004	9358746004	9358746004	9358746004
771	Panel Assy	9359076018	9359076018	9359076018	9359076018
735	Distributor Assy	9373034018	9373034032	9373034025	9373034025
790	Coupring Pipe Assy	9373038016	9373038023	9373038023	9373038023
800	Bypass Pipe Assy	9373032014	9373032021	9373032021	9373032021
815	Terminal 7P	9358660102	-	9358660102	-
824-3	Fuse BET3.15A - 250V	0600222512	0600222512	0600222512	0600222512
870-1	Arm	9358565001	9358565001	9358565001	9358565001
870-2	Center Arm	9359280002	9359280002	9359280002	9359280002
875	Power Supply PCB Assy	9704561022 (EZ-00101HSE-P)	9704561077 (EZ-00210HSE-P)	9704561022 (EZ-00101HSE-P)	9704561077 (EZ-00210HSE-P)
876-1	Step Motor-H	9359106012	9359106012	9359106012	9359106012
876-2	Step Motor-V	9359105015	9359105015	9359105015	9359105015
982	Cord Clamp	9357886008	-	9357886008	-

Outdoor Unit Parts:

Ref. No.	Description	Part No. (AOY18FNBK / AOY18FNBN)	Part No. (AOY24FNBK / AOY24FNBN)	Part No. (AOY18UNBKL / AOY18UNBNL)	Part No. (AOY24UNBKL / AOY24UNBNL)
2	Fan Guard	9371187013	9371187013	9371187013	9371187013
4	Emblem-Rear	9351355005	9351355005	9351355005	9351355005
5	Front Panel Ptd	9371924014	9371924014	9371924014	9371924014
7	Connector Cover (Cabinet)	9366398004	9366398004	9366398004	9366398004
8	Wire Assy (Comp)	9372334010	9372334010	9372334010	9372334010
9	Side Panel R Ptd	9371927015	9371927015	9371927015	9371927015
12	Base Assy, Ptd	9371920054	9371920016	9371920054	9371920016
13-1	3-Way Valve Assy	9372205013	9372205013	9372205013	9372205013
13-2	2-Way Valve Assy	9372204016	-	9372204023	-
15	Condenser sub assy	9372313046	9372313022	9372313039	9372313015
16	Condenser Assy	9372181041	9372181027	9372181034	9372181010
17	U-pipe Y	9372638019	-	9372638019	-
18	Inlet pipe (condenser) assy	9372185025	-	-	-
20	Discharge pipe assy	9371581040	9371581033	-	-
26	Compressor Cover	9372327012	9372327012	9372327012	9372327012
29	Separate Wall	9371933016	9371933016	9371933016	9371933016
32	Control Box	9371935010	9371935010	9371935010	9371935010
34	Capacitor, Plastic	9900130022	9900270049	9900130022	9900130022
37	Running Capacitor	9703107122	9703107023	9703107122	9703107023
38	Capacitor Clamp Metal	9351770013	313791061807	9351770013	313791061807
39	Propeller Fan Assy	9366378013	-	9366378013	-
41	Motor Induct	9601671022	-	9601671015	-
45-1	Motor Bracket	9371929019	9371929019	9371929019	9371929019
45-2	Motor Bracket-Top	9371931012	9371931012	9371931012	9371931012
45-3	Motor Bracket Center	9371930015	9371930015	9371930015	9371930015
45-4	Motor Bracket Bottom	9371932019	9371932019	9371932019	9371932019
46	Compressor Assy	9372558027	9372558010	9372558027	9372558010
47-1	Rubber (Discharge Pipe)	313194159807	-	313194159807	-
51	Special Nut M5	9300301015	9300301015	9300301015	9300301015
55	Special Nut M8	9355091008	9355091008	9355091008	9355091008
58-1	Suction pipe A	9372176030	9372176047	9372176030	9372176047
64	Side Panel L Ptd	9371926018	9371926018	9371926018	9371926018
69-3	Bolt, Hex. Socket	301210060360	301210060360	301210060360	301210060360
85	Valve Plate Ptd	9371928012	9371928012	9371928012	9371928012
107	Rubber Seat-A	9351049010	9351049010	9351049010	9351049010
109	Termminal Cover (Comp)	9371511016	9371511016	9371511016	9371511016
187	Clip (Cable)	9352715006	9352715006	9352715006	9352715006
199	Br Sheet	9363708059	-	-	-
218-3	Relay	9900074012	9900074012	9900074012	9900074012
218-4	Power Relay	-	-	-	-
259	Muffler	9372369012	-	-	-
271	4-Way Valve Rubber	313728251908	313728251908	313728251908	313728251908
272	Strainer	9369287008	9369287008	9369287008	9369287008
333	Accumulator	9368391003	-	-	-
343	Solenoid	9900165017	-	9900165017	-
344	4-Way Valve	9970036019	9900163013	9970036019	9900163013
361	Accum Support Assy	9372252017	-	-	-
412	Cover Gasket (Comp.)	9371512013	9371512013	9371512013	9371512013
413	Heater (Crank Case)	-	-	-	-
527	Protectiive Net	9371934013	-	9371934013	-
734	Top Panel	9371925011	-	9371925011	-
735-3	Capillary Assy	9372197042	-	9372197028	-
754	Terminal Gask. Washer	9351053017	-	9351053017	-
815-3	Terminal-5P	9358660119	-	9358660119	-
823-2	Fuse Holder	0500063024	-	0500063024	-
824-4	Fuse	0600222529	-	0600222529	-
982-1	Cord Clamp-A	9359822011	-	9359822011	-
982-2	Cord Clamp-B	9359823018	-	9359823018	-

Standard Accessories

The following installation parts are furnished. Use them as required.

Indoor Unit Accessories

Name and Shape	Qty	Application	Parts No.	Name and Shape	Qty	Application	Parts No.
Cover plate (left)	1		9358536018	Drain hose	1	Adhesive type 70 x 230	9359242000
Cover plate (right)	1		9358535011	Insulation (drain hose)	1	For fixing the drain hose L 280 mm	9359225003
Installation template	1	For under ceiling type	9359107002	VT wire	1		313806350303
Bracket (left)	1	For suspending the indoor unit from ceiling	9358596005	Remote control unit	1	Use for air conditioner operation	9371190020 (for cooling model) / 9371190013 (for cooling & heating model)
Bracket (right)	1		9358595008	Remote control unit holder	1	Use as remote control unit holder	9305642014
Anchor bolt (M12)	4		313806339400	Battery (penlight)	2	For remote control unit	0600185534
Special nut	4		9305642014	Tapping screw ( 3 x 12)	2	For remote control unit holder installation	301141533125
Spring washer	4		-	-	-	-	-
Wall bracket	2	For suspending the indoor unit on the wall	301821112213	Tapping screw ( 4 x 20)	6	For fixing the wall bracket	301141164200
Tapping screw ( 4 x 10)	-	-	-	Drain pipe	1	For outdoor unit drain piping work [Heat & Cool model (Reverse cycle) only]	-
Coupler heat insulator (large)	1	For indoor side pipe joint (Large pipe)	9350716012	Drain cap	2		301171164104
Coupler heat insulator (small)	1	For indoor side pipe joint (Small pipe)	31209328104	-	-	-	-

Outdoor Unit Accessories

Name and Shape	Qty	Application	Parts No.
Drain pipe	1	For outdoor unit drain piping work [Heat & Cool model (Reverse cycle) only]	-
Drain cap	2		301171164104

Optional Parts for Indoor Unit

Name and Shape	Qty	Application	Parts No.
Nylon fastener	1	For fixing the drain hose	312300787605	Joint pipe-A	1	For indoor side pipe joint	9302812021

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