Fujitsu Split Type Air Conditioner - Cassette Type (50 Hz)

This service manual provides detailed information for the Fujitsu Split Type Air Conditioner, Cassette Type, for both indoor and outdoor units.

Specifications

Electrical Data

TYPE		Cooling & Heating
INDOOR UNIT	AUYA36LATU	AUYA45LATU
OUTDOOR UNIT	AOYA36LATL	AOYA45LATL
COOLING CAPACITY	10.0 kW	12.5 kW
HEATING CAPACITY	11.2 kW	14.0 kW
POWER SOURCE	230 V 50 Hz	230 V 50 Hz
RUNNING CURRENT (Cooling)	13.6 A	17.0 A
RUNNING CURRENT (Heating)	13.2 A	16.5 A
INPUT WATTS (Cooling)	3.11 kW	3.89 kW
INPUT WATTS (Heating)	3.02 kW	3.77 kW
E.E.R. (Cooling)	3.21 kW/kW	3.21 kW/kW
E.E.R. (Heating)	3.71 kW/kW	3.71 kW/kW
STARTING CURRENT	15 A	15 A
MOISTURE REMOVAL	3.5 L/hr	4.5 L/hr
AIRCIRCULATION INDOOR	1,650 m³/hr	1,750 m³/hr
AIRCIRCULATION OUTDOOR	6,600 m³/hr	6,600 m³/hr
MAXIMUM CURRENT	19.0 A	20.0 A

Fan Motor

INDOOR UNIT	Discrimination	MFF-45RV	MFF-45RV
	High speed	680 r.p.m.	720 r.p.m.
	Med speed	570 r.p.m.	590 r.p.m.
	Low speed	480 r.p.m.	500 r.p.m.
	Quiet (cool/heat)	400 / 420 r.p.m.	440 / 440 r.p.m.
OUTDOOR	Discrimination	MFE-60PO	MFE-60PO
	Upper fan	850 r.p.m.	850 r.p.m.
	Lower fan	750 r.p.m.	750 r.p.m.

Noise Level

INDOOR UNIT	High speed	50 dB	52 dB
	Med speed	46 dB	47 dB
	Low speed	41 dB	42 dB
	Quiet (cool/heat)	36 dB / 37 dB	39 dB / 39 dB
OUTDOOR UNIT	Cooling	54 dB	55 dB
	Heating	55 dB	56 dB

Dimensions

INDOOR UNIT	H x W x D	296 x 830 x 830 mm
OUTDOOR UNIT	H x W x D	1,290 x 900 x 330 mm

Weight

INDOOR UNIT	Gross / Net	54 kg / 39 kg
OUTDOOR UNIT	Gross / Net	107 kg / 98 kg

Compressor and Refrigerant

TYPE	Hermetic type, Inverter, 4 poles, 3 phase, DC motor, Twin Rotary
DISCRIMINATION	DA420A3F-21ZA
WEIGHT (with oil)	23.7 kg
REFRIGERANT TYPE	R410A
STANDARD REFRIGERANT	3,350 g
MAX PIPE LENGTH	50 m
MAX PIPE HEIGHT	30 m
Pipe length	20 m: 3,350 g	30 m: 3,850 g
	40 m: 4,350 g	50 m: 4,850 g
ADDITIONAL CHARGE	50 g/m

Dimensions - Indoor Unit

All dimensions are in millimeters (mm).

Side view: Shows the unit's side profile with key measurements for depth and height, including the placement of pipes and drain.

Bottom view: Illustrates the underside of the unit, detailing the fan, mounting points, and overall width and depth.

Panel: Details the dimensions and components of the detachable front panel, including the air grille and its mounting hardware.

Selection of setting: Diagrams showing side views for standard and slender settings, indicating how the unit fits within ceiling spaces.

Dimensions - Outdoor Unit

All dimensions are in millimeters (mm).

Front view: Shows the front of the outdoor unit with dimensions for width, height, and depth, including the air intake grilles.

Side view: Details the side profile of the outdoor unit, indicating its depth and height.

Bottom view: Displays the base of the outdoor unit, showing the air flow direction and mounting points.

Refrigerant System Diagram

The diagram illustrates the flow of refrigerant between the outdoor and indoor units. Arrows indicate the direction of refrigerant flow for cooling (solid line) and heating (dashed line). Key components include the condenser, compressor, accumulator, expansion valve, and evaporator.

Circuit Diagrams

Detailed circuit diagrams are provided for both the indoor and outdoor units, illustrating the electrical connections and components of the control and power supply boards.

Indoor Unit Circuit Diagrams

Controller PCB Assembly (Main PCB): Shows the main control board with connections for various sensors, motors, and communication interfaces.
Power Supply PCB Assembly: Details the power supply components and their connections.
Indicator PCB Assembly: Outlines the components related to the unit's indicator lights and switches.

Outdoor Unit Circuit Diagrams

Controller PCB Assembly (Main PCB): Depicts the main control board for the outdoor unit, including connections for sensors, valves, and communication.
Power Supply PCB Assembly: Shows the power supply circuitry for the outdoor unit.

Error Contents and Troubleshooting

Indoor Unit Error Codes

Troubleshooting can be performed using the indoor unit's display (wired or wireless remote control). The OPERATION, TIMER, and FILTER lamps indicate error conditions.

Error Contents	OPERATION lamp (RED)	TIMER lamp (GREEN)	FILTER lamp (ORANGE)
Indoor signal error	×	□	×
Wired remote controller abnormal	×	(8 times)	×
Indoor room temperature sensor error	(2 times)	(2 times)	×
Indoor heat exchanger temperature sensor (middle) error	(2 times)	(3 times)	×
Indoor heat exchanger temperature sensor (inlet) error	(2 times)	(4 times)	×
Float switch operated	(2 times)	(6 times)	×
Outdoor discharge pipe temperature sensor error	(3 times)	(2 times)	×
Outdoor heat exchanger temperature sensor (outlet) error	(3 times)	(3 times)	×
Outdoor temperature sensor error	(3 times)	(4 times)	×
Heatsink sensor error	(3 times)	(7 times)	×
Compressor temperature sensor error	(3 times)	(8 times)	×
2-way valve temperature sensor error	(3 times)	×	(2 times)
3-way valve temperature sensor error	(3 times)	×	(3 times)
Outdoor heat exchanger temperature sensor (middle) error	(3 times)	×	(4 times)
Indoor manual auto switch abnormal	(4 times)	(2 times)	×
Power supply frequency detection error	(4 times)	(4 times)	×
IPM protection	(5 times)	(2 times)	×
CT error	(5 times)	(3 times)	×
Compressor location error	(5 times)	(5 times)	×
Outdoor fan error	(5 times)	(6 times)	×
Connected indoor unit abnormal	(5 times)	(7 times)	×
Outdoor unit computer communication error	(5 times)	(8 times)	×
Indoor fan abnormal	(6 times)	(2-3 times)	×
Discharge temperature error	(7 times)	(2 times)	×
Excessive high pressure protection on cooling	(7 times)	(3 times)	×
4-way valve abnormal	(7 times)	(4 times)	×
Pressure switch abnormal	(7 times)	(5 times)	×
Compressor temperature error	(7 times)	(6 times)	×
Active filter abnormal	(8 times)	(2-3 times)	×
PFC circuit error	(8 times)	(4 times)	×

(Flash: 0.5s ON / 0.5s OFF; OFF: Lamp is off)

Remote Control Unit Error Codes

When an error occurs, "EE" will appear in the set room temperature display on the wired remote control.

Code	Error Contents
0113 / 2627	Indoor signal error
00	Wired remote controller abnormal
02	Indoor room temperature sensor error
04	Indoor heat exchanger temperature sensor (middle) error
28	Indoor heat exchanger temperature sensor (inlet) error
09	Float switch operated
0C	Outdoor discharge pipe temperature sensor error
06	Outdoor heat exchanger temperature sensor (outlet) error
0A	Outdoor temperature sensor error
0E	Heatsink sensor error
15	Compressor temperature sensor error
1d	2-way valve temperature sensor error
1E	3-way valve temperature sensor error
29	Outdoor heat exchanger temperature sensor (middle) error
20	Indoor manual auto switch abnormal
2A	Power supply frequency detection error
17	IPM protection
18	CT error
1A	Compressor location error
1b	Outdoor fan error
1F	Connected indoor unit abnormal
1c	Outdoor unit computer communication error
12	Indoor fan abnormal
0F	Discharge temperature error
24	Excessive high pressure protection on cooling
2c	4-way valve abnormal
16	Pressure switch abnormal
2b	Compressor temperature error
19	Active filter abnormal
25	PFC circuit error

If "CO" appears in the unit number display, there is a remote control error. Refer to the installation instruction sheet.

Outdoor Unit LEDs

During a malfunction, LEDs on the outdoor unit circuit board indicate the error.

LED	Error Contents
1 flash	Communication error (Indoor unit - Outdoor unit)
2 flash	Discharge pipe temperature sensor
3 flash	Outdoor heat exchanger temperature (outlet) sensor
4 flash	Outdoor temperature sensor
5 flash	Outdoor heat exchanger temperature (mid) sensor
6 flash	Discharge pipe temperature abnormal
7 flash	Compressor temperature sensor
8 flash	Heat sink temperature sensor
9 flash	Pressure switch abnormal
10 flash	Compressor temperature abnormal
12 flash	IPM error
13 flash	Compressor rotor position cannot detect
14 flash	Compressor cannot operate
15 flash	Outdoor fan abnormal (upper fan)
16 flash	Outdoor fan abnormal (lower fan)
5 sec. on / 1 sec. off (repeat)	Protect operation
1 sec. on / 1 sec. off (repeat)	Pump down operation
off	No error

Special Installation Setting - Pump Down

This procedure is for collecting refrigerant when moving the unit.

Procedure when the product is stopped:

Press the PUMP DOWN switch on the outdoor unit. The LED on the outdoor unit circuit board starts flashing (1 sec. on / 1 sec. off repeated).
The pump down operation (cooling operation) begins. Close the three-way valve (liquid).
After 2-3 minutes, operation stops. Close the three-way valve (gas) within one minute after operation stops.
The LED will go out three minutes after it stops. Disconnect the power supply after confirming the LED has gone out.

Procedure when the product is operating:

Press the PUMP DOWN switch on the outdoor unit. The LED starts flashing, and operation stops. Do not close the three-way valves yet.
The pump down operation (cooling operation) begins after three minutes. Close the three-way valve (liquid) after operation starts.
After 2-3 minutes, operation stops. Close the three-way valve (gas) within one minute after operation stops.
The LED will go out three minutes after it stops. Disconnect the power supply after confirming the LED has gone out.

Note: If repeating pump down, temporarily disconnect power after opening valves, wait 2-3 minutes, reconnect, and perform pump down. After pump down completion, temporarily disconnect power, open valves, wait 2-3 minutes, reconnect, and perform a test operation for cooling.

DANGER: The choke coil generates high voltages. Never touch this part.

Tightening Torques for Connections

Component	Size	Tightening Torque
Blank cap	6.35 mm (1/4 in.)	20 to 25 N-m (200 to 250 kgf-cm)
	9.52 mm (3/8 in.)	20 to 25 N-m (200 to 250 kgf-cm)
	12.70 mm (1/2 in.)	25 to 30 N-m (250 to 300 kgf-cm)
	15.88 mm (5/8 in.)	30 to 35 N-m (300 to 350 kgf-cm)
	19.05 mm (3/4 in.)	35 to 40 N-m (350 to 400 kgf-cm)
Charging port cap		10 to 12 N-m (100 to 120 kgf-cm)
Spindle (Hexagon wrench)		6 to 7 N-m (60 to 70 kgf-cm)

Parts - Indoor Unit

Intake Grille Sub Assy

Ref.	Description	Parts number
1	Decoration Plate	9378017016
2	Intake Grille Sub Assy	9362818131
3	Intake Grille	9362767019
4	Filter	9362766005
5	Grille Reinforcement-T (A)	9362738002
6	Grille Reinforcement-T (B)	9362739009
7	Grille Reinforcement-T (C)	9362740005
8	Grille Reinforcement-T (D)	9362741002
9	Grille Reinforcement-T (E)	9362742009
10	Insulation (Grille)-A	9362780001
11	Insulation (Grille)-B	9362781008
12	Grille Hook Holder	9362782005
13	Grille Hook-A	9362779012
14	Grille Hook-B	9362778015
15	Grille Spring	9362755009
16	Grille Hinge Wire	9362754002

Panel Base Components

Ref.	Description	Part number
21	Panel Frame Holder	9362758017
22	Panel Base	9362759014
23	Joint A	9362773003
24	Joint Shaft	9362771009
25	Louver Supporter	9362770019
26	Joint Gear	9362772006
27	Rubber Support Holder	9362799003
28	Step Motor	9900362027
29	Motor Gear	9362764001
30	Motor Holder	9362765008
31	Panel Frame Holder	9362761017
32	Panel Base Holder	9362760010
33	Louver Assy	9362836012
34	Wire Cover-B	9362788007
35	Spacial Nut-A (Large)	313005446653
36	Spacial Nut-B (Small)	313005446759
-	PCB Holder	9364855004
-	Indicator PCB Assy	9705891036

Evaporator and Drain Pan Components

Ref.	Description	Parts number
41	Evaporator Assy	9373799047
42	Evaporator B Assy	9373800040
43	Distributor Assy	9371325101
44	Coupling Pipe Assy	9373038290
45	Separate Wall	9362737005
46	Clamp No.1219	313361271706
47	Pipe Thermistor	9703297021
48	Thermistor Spring-A	313728262708
49	Evaporator Holder Assy	9362802017
50	Wind Guide Board	9373444015
51	Reinforcement (Eva.)-A	9362749008
52	Reinforcement (Eva.)-B	9362750004
53	Kit (Drain Pan Assy)	9370934021
54	Reinforcement (Drain Pan)	9362757003
55	Rubber Cap	313005174654
56	Pump Unit	9900360030
57	Drain Hose	9362784009
58	Drain Port	9362786003
59	Drain pump Holder	9362753005
60	Pump Cover-A	9362775007
61	Pump Cover-B	9362776004
62	Cushion Rubber (Pump)	9362777001
63	Float Switch	9900361020
-	Rubber (Discharge Pipe)	313194159807

Fan Motor Components

Ref.	Description	Parts number
81	Motor Cover	9362801010
82	Motor Holder	9378019010
83	Motor Assy	9378020016
84	Fan Motor	9362755006
85	Fan Assy (Turbo Fan)	9362735001
86	Fan Motor Base	9362736008
87	Fan Cover	9378021015
88	Fan Motor	9378023017
89	Motor Cover	9370624007
90	Fan Assy	9362819022
91	Fan Motor Holder	9362758017
92	Motor Holder	9362760010
93	Panel Base Holder	9362761017
94	Panel Base	9362762014
95	Panel Cover	9378023017
96	Panel Holder Assy	9362819022

Control Unit Components

Ref.	Description	Parts number
101	Control Unit Base	9362732048
102	Control Unit Cover	9362800013
103	Control Unit Assy	9362807007
104	Indicator PCB Assy	9362734004
105	Power PCB Assy	9362768009
106	PCB Holder	9802486014
107	Screw	9378019010
108	Screw	9378020016
109	Terminal Block	9362756006
110	Wire	9362735001
111	Wire Cover	9362792015
112	Motor Assy	9306489045

Parts - Outdoor Unit

External Components

Ref.	Description	Parts number
1	Top Panel Sub Assy	9374417025
2	Front Panel	9374094028
3	Fan Guard	9374330010
4	Grip Side	9374173013
5	Service Panel Sub Assy	9374415069
6	Right Panel Sub Assy	9374416141
7	Valve Cover	9374174010
--	Emblem Rear	9351355005

Internal Components

Ref.	Description	Parts number
9	Propeller Fan Assy	9366378020
10	Motor DC Brushless	9601882015
11	Condenser A Assy	9374433018
12	Condenser B Assy	9374434015
13	Sepa Wall	9374629015
14	Cap Foot	9374345014
15	Base Assy	9374166046
16	Coil Choke	9703458019

Refrigerant Circuit Components

Ref.	Description	Parts number
17	3-Way Valve Assy	9377958013
18	3-Way Valve Assy	9377959010
19	Compressor Assy	9378035010
20	Accumulator Assy	9375250034
21	Solenoid	9900165055
22	Pressure Switch	9900186012
23	4-Way Valve	9970035029
24	Check Valve Assy	9374274017
25	Coil (Expansion Valve)	9900197025
26	Strainer Assy	9372524039
42	Expansion Valve Assy	9370947175
54	Compressor Cover A	9374430109
55	Compressor Cover B	9374431106
56	Compressor Cover C	9372067086
57	Compressor Cover D	9375382025
58	Solenoid	9900165055

Electrical Components

Ref.	Description	Parts number
27	Inverter Box A	9374603015
28	Inverter Box B	9374625017
29	Inverter Box C	9374605026
30	Inverter Box Duct	9374609017
31	Inverter Box Cover	9374608010
32	Heat Sink B	9374607020
33	ACTPM	9707592016
36	Posistor	9704265012
37	Inverter PCB Assy (36)	9707537024
37	Inverter PCB Assy (45)	9707537017
38	Power PCB Assy	9705647022
39	Clamp (Cord)	9356857009
40	Terminal	9900203023
41	Fuse (Small)	0600376116
43	Thermistor (Discharge)	9704219084
44	Thermistor (Heat Exchanger)	9900374037
45	Thermistor (Out Temp)	9900378035
46	Compressor Thermistor	9900156060
47	Heatsink Thermistor	9900311018
48	Wire (Pressure Switch)	9367595051
50	Thermistor (Heat Exchanger)	9900403010
51	Fuse Holder (Small)	0501456016
52	Fuse Holder (Large)	0501454012
53	Fuse (Large)	0600086039

Accessories

Indoor Unit Accessories

Name and Shape	Q'ty	Application
Coupler heat insulation	2	For indoor side pipe joint
Tapping Screw (flush heads)	2	For installing the remote controller (option)
Special nut A (large flange)	4	For installing indoor unit
Special nut B (small flange)	4	For installing indoor unit
Template	1	For ceiling hole cutting
Binder	1	For fixing the remote controller cord
Blower cover insulation	2	For discharged air
Hook wire	2	For installing intake grille
Rubber sheet	2	For wiring cover
Remote control	1	For air conditioner operation
Remote controller cord	1	For connecting the remote controller

Outdoor Unit Accessories

Name and Shape	Q'ty	Application	Part number
Drain pipe / Drain cap	1	For outdoor unit drain piping work (May not be supplied, depending on the model)	9303029015
Drain cap	2		313166024302
Installation (seal)	1	For filling in a gap at the entrance of connection cords	9374756018

	Fujitsu Split Type Air Conditioner Cassette Service Manual Comprehensive service manual for Fujitsu Split Type Air Conditioners, Cassette type (50Hz) models AUY36TLB3W/AOY36TPB3L and AUY45TLB3W/AOY45TPB3L. Includes specifications, diagrams, error codes, disassembly illustrations, and parts lists.
	Fujitsu ASYA12LCC AOYR12LCC Split Type Air Conditioner Service Manual Comprehensive service manual for Fujitsu split type, wall-mounted room air conditioners, models ASYA12LCC and AOYR12LCC. Includes specifications, diagrams, error codes, disassembly instructions, parts lists, and accessories.
	Fujitsu ASYG14LECA Room Air Conditioner Service Manual This service manual provides detailed specifications, dimensions, refrigerant system diagrams, circuit diagrams, error detection codes, and parts lists for the Fujitsu ASYG14LECA Room Air Conditioner (Wall Mounted Type).
	Fujitsu ASYA18LEC / AOYR18LEC Split Type Room Air Conditioner Service Manual This service manual provides detailed specifications, diagrams, error codes, and parts lists for the Fujitsu ASYA18LEC indoor unit and AOYR18LEC outdoor unit, split-type room air conditioners.
	Fujitsu ASYG07LMCE/ASYG09LMCE Wall Mounted Air Conditioner Service Manual Comprehensive service manual for Fujitsu split type wall-mounted air conditioners, models ASYG07LMCE and ASYG09LMCE. Includes specifications, dimensions, refrigerant system diagram, circuit diagrams, error detection codes, and detailed parts lists for both indoor and outdoor units.
	Fujitsu ARYG45/54LHTA & AOYG45/54LATT Service Manual \| Technical Guide Comprehensive service manual for Fujitsu ARYG45LHTA, ARYG54LHTA indoor units and AOYG45LATT, AOYG54LATT outdoor units. Includes specifications, diagrams, error codes, and troubleshooting.
	Fujitsu Split Type Room Air Conditioner Service Manual - ABY45RBA3W, AOY45RPA3L Comprehensive service manual for Fujitsu Split Type Room Air Conditioner, Ceiling type (50Hz), models ABY45RBA3W and AOY45RPA3L. Covers specifications, diagrams, error codes, disassembly procedures, parts lists, and standard accessories.
	Fujitsu Split Type Room Air Conditioner Service Manual Comprehensive service manual for Fujitsu split type room air conditioners, covering models ASYA14LCC, AOYR14LCC, ASYA14LCL, ASYA18LCC, AOYR18LCC, and AOYR18LCL. Includes specifications, diagrams, error codes, and parts lists.