Daikin FTKB12AXVJURKB12AXVJU, FTKB18AXVJURKB18AXVJU, FTXB24AXVJURXB24AXVJU, FTXB12AXVJURXB12AXVJU, FTXB18AXVJURXB18AXVJU User Manual

SERVICE MANUAL

Inverter Wall Mounted Single Split

MODELS

Cooling Only

FTKB09AXVJU RKB09AXVJU

FTKB12AXVJU RKB12AXVJU

FTKB18AXVJU RKB18AXVJU

FTKB24AXVJU RKB24AXVJU

FTKN09AXVJU RKN09AXVJU

FTKN12AXVJU RKN12AXVJU

FTKN18AXVJU RKN18AXVJU

FTKN24AXVJU RKN24AXVJU

Heatpump

FTXB09AXVJU RXB09AXVJU

FTXB12AXVJU RXB12AXVJU

FTXB18AXVJU RXB18AXVJU

FTXB24AXVJU RXB24AXVJU

FTXN09AXVJU RXN09AXVJU

FTXN12AXVJU RXN12AXVJU

FTXN18AXVJU RXN18AXVJU

FTXN24AXVJU RXN24AXVJU

SM-5WM-Y-NA-B1

			Table of Contents
Table of Contents
1.0 Inverter Single Split......................................................................................................			1
1.1	Product line-up.........................................................................................................		1
1.2	Printed Circuit board (PCB) connector wiring diagram............................................		3
1.3	Piping Length & Elevation......................................................................................		10
1.4	Outline & Dimension..............................................................................................		11
1.5	Engineering Data...................................................................................................		15
2.0 Function & Control......................................................................................................			17
2.1 Temperature Control...............................................................................................			17
2.2	Cooling and Heating Mode Operation....................................................................		17
2.3	Dry Mode................................................................................................................		18
2.4 Fan Mode...............................................................................................................			19
2.5 Auto Mode..............................................................................................................			19
2.6	Cold Draft Prevention.............................................................................................		19
2.7	Sleep Mode............................................................................................................		20
2.8	Quiet Function........................................................................................................		20
2.9 Eco+ Function.........................................................................................................			20
2.10 Powerful Function.................................................................................................			21
2.11 Indoor - Outdoor Communication.........................................................................			21
2.12 Thermistors in RK(X)B,RK(X)N ...........................................................................			22
2.13		Minimum Off Time Control....................................................................................	23
2.14 Auto Restart.........................................................................................................			23
2.15 Auto Random Restart...........................................................................................			23
2.16		Four Way Valve Control.......................................................................................	24
2.17		Outdoor Fan Control............................................................................................	24
2.18		Rotation Regulating Functions.............................................................................	25
2.19		Defrost Cycle........................................................................................................	26
2.20		Indoor Coil Freeze Prevention.............................................................................	27
2.21		High Pressure Protection.....................................................................................	27
2.22		Discharge Pipe Temperature Control...................................................................	28
2.23		Overall Current Control........................................................................................	28
2.24		Overall Frequency Control...................................................................................	29
3.0 Service Diagnosis.......................................................................................................			31
3.1	Error Indication from Indoor...................................................................................		31
3.2 Error Code retrieved by handset.............................................................................			33
3.3	Error code description for Inverter..........................................................................		34

		Table of Contents
4.0	Wiring Connection......................................................................................................	61
5.0	Refrigerant Diagram....................................................................................................	65
6.0 Appendix A...................................................................................................................		67

ii

Table of Contents

Safety Cautions

Caution and warnings

•Be sure to read the following safety cautions before conducting repair work.

•The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The

“ Caution” items can also lead to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety caution items described below.

•About the pictograms

This symbol indicates an item for which caution must be exercised.

The pictogram shows the item to which attention must be paid.

This symbol indicates a prohibited action.

The prohibited item or action is shown inside or near the symbol.

This symbol indicates an action that must be taken, or an instruction.

The instruction is shown inside or near the symbol.

•After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer.

Caution in Repair

Warning

Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for a repair.

Working on the equipment that is connected to a power supply can cause an electrical shock.

If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not touch any electrically charged sections of the equipment.

If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas.

The refrigerant gas can cause frostbite.

When disconnecting the suction or discharge pipe of the compressor at the welded section, release the refrigerant gas completely at a well-ventilated place first.

If there is a gas remaining inside the compressor, the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected, and it can cause injury.

If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate toxic gases when it contacts flames.

The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit.

Be sure to discharge the capacitor completely before conducting repair work. A charged capacitor can cause an electrical shock.

Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug.

Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or fire.

Table of Contents

Caution

Do not repair the electrical components with wet hands.

Working on the equipment with wet hands can cause an electrical shock.

Do not clean the air conditioner by splashing water.

Washing the unit with water can cause an electrical shock.

Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

Be sure to turn off the power switch and unplug the power cable when cleaning the equipment.

The internal fan rotates at a high speed, and cause injury.

Do not tilt the unit when removing it.

The water inside the unit can spill and wet the furniture and floor.

Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting repair work.

Working on the unit when the refrigerating cycle section is hot can cause burns.

Use the welder in a well-ventilated place.

Using the welder in an enclosed room can cause oxygen deficiency.

iv

Table of Contents

Cautions Regarding Products after Repair

Warning

Be sure to use parts listed in the service parts list of the applicable model and appropriate
tools to conduct repair work. Never attempt to modify the equipment.
The use of inappropriate parts or tools can cause an electrical shock, excessive heat
generation or fire.
When relocating the equipment, make sure that the new installation site has sufficient
strength to withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation work is not
conducted securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard installation frame.	For integral
Incorrect use of the installation frame and improper installation can cause the equipment	units only
to fall, resulting in injury.
Be sure to install the product securely in the installation frame mounted on a window	For integral
frame.	units only
If the unit is not securely mounted, it can fall and cause injury.
Be sure to use an exclusive power circuit for the equipment, and follow the technical
standards related to the electrical equipment, the internal wiring regulations and the
instruction manual for installation when conducting electrical work.
Insufficient power circuit capacity and improper electrical work can cause an electrical
shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor units. Make
the connections securely and route the cable properly so that there is no force pulling the
cable at the connection terminals.
Improper connections can cause excessive heat generation or fire.
When connecting the cable between the indoor and outdoor units, make sure that the
terminal cover does not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause an
electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire.
Placing heavy items on the power cable, and heating or pulling the power cable can
damage the cable.
Do not mix air or gas other than the specified refrigerant (R-410A) in the refrigerant
system.
If air enters the refrigerating system, an excessively high pressure results, causing
equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the
refrigerant. After charging refrigerant, make sure that there is no refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to perform
pump-down and close the service valve, to prevent the refrigerant gas from leaking into
the room. The refrigerant gas itself is harmless, but it can generate toxic gases when it
contacts flames, such as fan and other heaters, stoves and ranges.
When replacing the coin battery in the remote controller, be sure to disposed of the old
battery to prevent children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.

Table of Contents

Caution

Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks.

Do not install the equipment in a place where there is a possibility of combustible gas leaks.

If a combustible gas leaks and remains around the unit, it can cause a fire.

Be sure to install the packing and seal on the installation frame properly.

If the packing and seal are not installed properly, water can enter the room and wet the furniture and floor.

Inspection after Repair

Warning

Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet all the way.

If the plug has dust or loose connection, it can cause an electrical shock or fire.

If the power cable and lead wires have scratches or deteriorated, be sure to replace them.

Damaged cable and wires can cause an electrical shock,excessive heat generation or fire.

Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire.

Caution

Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

Improper installation and connections can cause excessive heat generation, fire or an electrical shock.

If the installation platform or frame has corroded, replace it.

Corroded installation platform or frame can cause the unit to fall, resulting in injury.

Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can cause an electrical shock.

Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 Mohm or higher.

Faulty insulation can cause an electrical shock.

Be sure to check the drainage of the indoor unit after the repair.

Faulty drainage can cause the water to enter the room and wet the furniture and floor.

vi

Inverter Single Split

1.0Inverter Single Split

1.1Product line-up

1.1.1 Indoor Unit

Classification

Nomenclature

RemoteController

PCB

AirPurification

Marking

Others

BRC52A61

BRC52A62

BRC52B63

BRC52B64

W_2_03C

W_2_03D

W_2_03E

W_2_03E_M

W_2_04A

W_2_04B

Saranet Filter

Titanium Apatite

UL

CE

Auto Restart

FTKB09/12AXVJU

X

X

X

X

X

X

FTKN09/12AXVJU

X

X

X

X

X

FTKB18/24AXVJU

X

X

X

X

X

X

FTKN18/24AXVJU

X

X

X

X

X

FTXB09/12AXVJU

X

X

X

X

X

X

FTXN09/12AXVJU

X

X

X

X

X

FTXB18/24AXVJU

X

X

X

X

X

X

FTXN18/24AXVJU

X

X

X

X

X

1

Inverter Single Split

1.1.2 Outdoor Unit

Classification

Nomenclature

PCB

Refrigerant Control

Fin

Compressor

Marking

Others

Main PCB (ADGPA34)

Main PCB (Y364)

Filter PCB (YV62)

EXV

Hydrophilic (Blue)

Hydrophilic (Gold)

DC Inverter Swing

UL

CE

Drain Elbow

RKB09/12AXVJU

X

X

X

X

X

RKN09/12AXVJU

X

X

X

X

X

RKB18/24AXVJU

X

X

X

X

X

X

RKN18/24AXVJU

X

X

X

X

X

X

RXB09/12AXVJU

X

X

X

X

X

X

RXN09/12AXVJU

X

X

X

X

X

X

RXB18/24AXVJU

X

X

X

X

X

X

X

RXN18/24AXVJU

X

X

X

X

X

X

X

2

Inverter Single Split

1.2 Printed Circuit Board (PCB) connector wiring diagram

1.2.1 Indoor PCB: FTKB09/12AXVJU, FTKN09/12AXVJU, FTXB09/12AXVJU, FTXN09/12AXVJU

1.2.1.1 Main PCB: W_2_03D ; W_2_03E ; W_2_03E_M

Item	Indication on PCB	Description
1	A1	Connector for fan motor
2	A2	Connector for swing motor
3	A3	Connector for fan motor feedback
4	A4	Fuse
5	A5	Varistor
6	A6	Connector for wired controller
7	A7	Connector for signal receiver PCB
8	A8	Connector for heat exchanger thermistor

A1 A2 A3

A5	A4

A7

A6

A8

3

Inverter Single Split

1.2.1.2 Signal board

Item	Indication on PCB	Description
1	A1	Operational LED
2	A2	Connector for Control PCB
3	A3	Remote controller signal receiver
4	A4	Operation ON/OFF switch
5	A5	Buzzer

A1

A3

A2

A4

A5

Applicable Model :	Applicable Model :
FTKB09/12AXVJU	FTKN09/12AXVJU
FTXB09/12AXVJU	FTXN09/12AXVJU

4

Inverter Single Split

1.2.2 Indoor PCB: FTKB18/24AXVJU, FTKN18/24AXVJU, FTXB18/24AXVJU,

FTXN18/24AXVJU

1.2.2.1 Main PCB: W_2_04A ; W_2_04B

		Item			Indication on PCB	Description
	1				A1	Connector for fan motor
	2				A2	Connector for swing motor
	3				A3	Connector for fan motor feedback
	4				A4	Fuse
	5				A5	Varistor
	6				A6	Connector for wired controller
	7				A7	Connector for signal receiver PCB

5

Inverter Single Split

1.2.2.2 Signal board

Item	Indication on PCB	Description
1	A1	Operational LED
2	A2	Connector for Control PCB
3	A3	Remote controller signal receiver
4	A4	Operation ON/OFF switch
5	A5	Buzzer

A1

A3

A2

A4

A5

Applicable Model :	Applicable Model :
FTKB18/24AXVJU	FTKN18/24AXVJU
FTXB18/24AXVJU	FTXN18/24AXVJU

6

Inverter Single Split

1.2.3 Outdoor PCB: RKB09/12AXVJU, RKN09/12AXVJU, RXB09/12AXVJU, RXN09/12AXVJU

1.2.3.1 Main PCB

Item	Indication on PCB	Description
1	S11	Connector for S10 on main PCB
2	HL1, HN1, S	Connector for terminal board
3	E1, E2	Terminal for earth wire
4	HL2, HN2	Connector for HL3 HN3 on main PCB
5	HL4, HN4	Connector for S12 on main PCB
6	FU1	Fuse (3.15A, 250V)
7	FU3	Fuse (30A, 250V)
8	V2, V3	Varistor

7

Inverter Single Split

1.2.4 Outdoor PCB: RKB18/24AXVJU, RKN18/24AXVJU, RXB18/24AXVJU, RXN18/24AXVJU

1.2.4.1 Filter PCB

Item	Indication on PCB	Description
1	S11	Connector for indoor PCB
2	FU3	Fuse (20A)
3	V2, V3	Varistor

8

Inverter Single Split

1.2.4.2 Main PCB

	Item	Indication on PCB	Description
	1	S10	Connector for filter PCB
	2	S20	Connector for electronic expansion valve coil
	3	S40	Connector for overload protector
	4	S70	Connector for fan motor
	5	S80	Connector for four way valve coil
	6	S90	Connector for thermistors (outdoor temperature,
			outdoor heat exchanger, discharge pipe)
	7	HL3, HN3	Connector for filter PCB
	8	FU1, FU2	Fuse (3.15A)
	9	LED A	Service monitor LED (green)
	10	V1	Varistor

9

Inverter Single Split

1.3 Piping Length & Elevation

		Max. total piping	Max. height	Pre-charge for o	Additional charge
	Model	length, L	difference, E	to piping length
					[oz/ft (g/m)]
		[ft,(m)]	[ft,(m)]	[ft,(m)]
	RK(X)B09AX	65.6 (20)	32.8 (10)	25 (7.6)	0.21 (20)
	RK(X)N09AX
	RK(X)B12AX	65.6 (20)	32.8 (10)	25 (7.6)	0.21 (20)
	RK(X)N12AX
	RK(X)B18AX	98.4 (30)	32.8 (10)	25 (7.6)	0.21 (20)
	RK(X)N18AX
	RK(X)B24AX	98.4 (30)	32.8 (10)	25 (7.6)	0.21 (20)
	RK(X)N24AX

Remark : The refrigerant pre-charged in the outdoor unit is for piping length up to 25ft (7.6m).

Indoor unit
Outdoor Unit	L	E

10

Inverter Single Split

1.4 Outline & Dimension

1.4.1 Indoor Unit

Model: FTK(X)B09/12AX, FTK(X)N09/12AX

THE MARKSHOWS PIPING DIRECTION

	A
REAR	REAR
LEFT
	TOP VIEW
B
BOTTOM	BOTTOM
LOUVER	FRONT GRILLE FIXED SCREWS
	(INSIDE)
	FRONT VIEW

FOR ILLUSTRATIVE PURPOSES ONLY

RIGHT

C

SIGNAL RECEIVER	B	NAME PLATE
		TERMINAL
		BLOCK
INDOOR UNIT		WITH EARTH
ON/OFF SWITCH	SIDE VIEW	TERMINAL

ROOM TEMPERATURE THERMISTOR (INSIDE)



F

F

K

09/12

Model

Dimension

A

B

C

D

E

F

G

H

I

J

K

L

M

09/12

35-1/16

11-11/16

8-1/4

4-1/16

5-9/16

1-3/16

1-13/16

2-3/16

2-3/16

6

7-1/8

8-1/8

2-1/16

(890)

(297)

(210)

(104)

(141)

(30)

(46)

(55)

(56)

(153)

(181)

(207)

(52)

Note: Dimension in inch (mm)

11

Inverter Single Split

Model: FTK(X)B18/24AX, FTK(X)N18/24AX

THE MARKSHOWS PIPING DIRECTION

	A
REAR	REAR
LEFT
	TOP VIEW
B
BOTTOM	BOTTOM
LOUVER	FRONT GRILLE FIXED SCREWS
	(INSIDE)
	FRONT VIEW

FOR ILLUSTRATIVE PURPOSES ONLY

RIGHT

C

SIGNAL RECEIVER	B	NAME PLATE
		TERMINAL
		BLOCK
INDOOR UNIT		WITH EARTH
ON/OFF SWITCH	SIDE VIEW	TERMINAL

ROOM TEMPERATURE THERMISTOR (INSIDE)

Model	Dimension	A	B	C	D	E	F	G
	18/24	46-1/8	12-5/8	9-1/2	7-1/2	6-13/16	2-3/8	1-9/16
		(1172)	(320)	(242)	(190)	(173)	(61)	(40)
Model	Dimension	H	I	J	K	L	M
	18/24	1-3/4	1-7/8	3-9/16	8-5/8	22-13/16	1-3/4
		(45)	(48)	(91)	(219)	(580)	(45)

Note: Dimension in inch (mm)

12

Inverter Single Split

1.4.2 Outdoor Unit

Model: RK(X)B09/12AX, RK(X)N09/12AX

J

G

E	F	2.0	D
			A

FOR ILLUSTRATIVE PURPOSES ONLY

H I

O

N

	Q
	P
B	C

L

MK

Model	Dimension	A		B	C	D	E	F	G	H	I
	09/12	21-5/8	22-15/16		2	7/16	10-3/4	5/8	9/16	18-1/2	3-3/4
		(550)	(658)		(51)	(11)	(273)	(16)	(14)	(470)	(96)
Model	Dimension	J		K	L	M	N	O	P	Q
	09/12	3-11/16		3-11/16	2-3/8	9/16	5-1/4	5/16	3/8	11-3/4
		(93)		(94)	(60)	(14)	(133)	(8)	(10)	(299)

Note: Dimension in inch (mm)

13

Inverter Single Split

Model: RK(X)B18/24AX, RK(X)N18/24AX

FOR ILLUSTRATIVE PURPOSES ONLY

		A	N	C
	D
3.0				F
				E
B

	Dimension	A	B	C	D	E	F	G	H	I	J
	Model
	18	33-11/16	24-3/4	12-15/16	20-1/2	7-1/16	1-13/16	4	4-7/16	23-3/4	4-15/16
		(855)	(628)	(328)	(520)	(179)	(46)	(101)	(113)	(603)	(126)
	24	33-11/16	28-3/4	12-15/16	20-1/2	7-1/16	1-13/16	4	4-7/16	23-3/4	4-15/16
		(855)	(730)	(328)	(520)	(179)	(46)	(101)	(113)	(603)	(126)

	Dimension	K	L	M	N	O	P	Q	R	S	T
	Model
	18	6-7/16	9/16	1-5/16	15/16	14-1/4	2-7/8	2-15/16	5/16 (8)	2-5/8	1/4
		(164)	(15)	(34)	(23)	(362)	(73)	(75)		(67)	(7)
	24	6-7/16	9/16	1-5/16	15/16	14-1/4	2-7/8	2-15/16	5/16 (8)	2-5/8	1/4
		(164)	(15)	(34)	(23)	(362)	(73)	(75)		(67)	(7)

Note: Dimension in inch (mm)

14

Inverter Single Split

1.5 Engineering Data

1.5.1 Cooling Only

	Model		Indoor unit			FTKB09AXVJU	FTKB12AXVJU	FTKB18AXVJU	FTKB24AXVJU
			Outdoor unit			RKB09AXVJU	RKB12AXVJU	RKB18AXVJU	RKB24AXVJU
	Nominal Cooling Capacity (Min. ~ Max.)				Btu/h	8800 (4400 - 10200)	11000 (4400 - 13000)	18000 (4300 - 21200)	21200 (6000 - 22200)
					W	2570 (1300 - 3000)	3220 (1300 - 3800)	5270 (1260 - 6200)	6210 (1750 - 6500)
	Nominal Total Input Power				W	800	1294	1710	1927
	Nominal Running Current				A	3.60	5.79	7.48	8.47
	SEER					17	17	17	17
	EER				(Btu/h)/W	11.00	8.50	10.50	11.00
	Power Supply				V/Ph/Hz	208/230/1/60	208/230/1/60	208/230/1/60	208/230/1/60
		Airflow (H/M/L/T/Q)			cfm	330/272/215/378/165	360/282/232/392/165	430/374/318/486/274	555/486/405/605/336
	UNIT	Sound Pressure Level (H/M/L/T/Q)			dB(A)	42/35/30/43/23	42/35/32/43/22	40/37/35/43/32	47/44/41/49/37
		Height			in. (mm)	11-11/16 (297)	11-11/16 (297)	12-5/8 (320)	12-5/8 (320)
	INDOOR
		Depth			in. (mm)	8-1/4 (210)	8-1/4 (210)	9-1/2 (242)	9-1/2 (242)
		Width			in. (mm)	35-1/16 (890)	35-1/16 (890)	46-1/8 (1172)	46-1/8 (1172)
		Machine Weight			lbs (kg)	20 (9)	20 (9)	31 (14)	31 (14)
	UNIT	Sound Pressure Level			dB(A)	46	48	53	52
		Height			in. (mm)	21-5/8 (550)	21-5/8 (550)	25-11/16 (651)	29-11/16 (753)
	OUTDOOR
		Width			in. (mm)	25-15/16 (658)	25-15/16 (658)	33-11/16 (855)	33-11/16 (855)
		Depth			in. (mm)	10-3/4 (273)	10-3/4 (273)	12-15/16 (328)	12-15/16 (328)
		Machine Weight			lbs (kg)	53 (24)	57 (26)	82 (37)	97 (44)
	Piping Connections			Liquid	in. (mm)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)
				Gas	in. (mm)	3/8 (9.52)	3/8 (9.52)	1/2 (12.70)	5/8 (15.88)
	Operation Range				°F	50 ~115	50 ~115	14 ~115	14 ~115
	Model		Indoor unit			FTKN09AXVJU	FTKN12AXVJU	FTKN18AXVJU	FTKN24AXVJU
			Outdoor unit			RKN09AXVJU	RKN12AXVJU	RKN18AXVJU	RKN24AXVJU
	Nominal Cooling Capacity (Min. ~ Max.)				Btu/h	8800 (4400 - 10200)	11000 (4400 - 13000)	18000 (4300 - 21200)	21200 (6000 - 22200)
					W	2570 (1300 - 3000)	3220 (1300 - 3800)	5270 (1260 - 6200)	6210 (1750 - 6500)
	Nominal Total Input Power				W	800	1294	1710	1927
	Nominal Running Current				A	3.60	5.79	7.48	8.47
	SEER					17	17	17	17
	EER				(Btu/h)/W	11.00	8.50	10.50	11.00
	Power Supply				V/Ph/Hz	208/230/1/60	208/230/1/60	208/230/1/60	208/230/1/60
		Airflow (H/M/L/T/Q)			cfm	330/272/215/378/165	360/282/232/392/165	430/374/318/486/274	555/486/405/605/336
	UNIT
		Sound Pressure Level (H/M/L/T/Q)			dB(A)	42/35/30/43/23	42/35/32/43/22	40/37/35/43/32	47/44/41/49/37
		Height			in. (mm)	11-5/16 (288)	11-5/16 (288)	12-3/16 (310)	12-3/16 (310)
	INDOOR
		Depth			in. (mm)	8-1/4 (209)	8-1/4 (209)	9-5/16 (237)	9-5/16 (237)
		Width			in. (mm)	33-13/16 (859)	33-13/16 (859)	44-1/4 (1124)	44-1/4 (1124)
		Machine Weight			lbs (kg)	20 (9)	20 (9)	31 (14)	31 (14)
	UNIT	Sound Pressure Level			dB(A)	46	48	53	52
		Height			in. (mm)	21-5/8 (550)	21-5/8 (550)	25-11/16 (651)	29-11/16 (753)
	OUTDOOR
		Width			in. (mm)	25-15/16 (658)	25-15/16 (658)	33-11/16 (855)	33-11/16 (855)
		Depth			in. (mm)	10-3/4 (273)	10-3/4 (273)	12-15/16 (328)	12-15/16 (328)
		Machine Weight			lbs (kg)	53 (24)	57 (26)	82 (37)	97 (44)
	Piping Connections			Liquid	in. (mm)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)
				Gas	in. (mm)	3/8 (9.52)	3/8 (9.52)	1/2 (12.70)	5/8 (15.88)
	Operation Range				°F	50 ~115	50 ~115	14 ~115	14 ~115

15

										Inverter Single Split
	1.5.2 Heatpump
	Model			Indoor unit			FTXB09AXVJU	FTXB12AXVJU	FTXB18AXVJU	FTXB24AXVJU
				Outdoor unit			RXB09AXVJU	RXB12AXVJU	RXB18AXVJU	RXB24AXVJU
	Nominal Cooling Capacity (Min. ~ Max.)					Btu/h	8800 (4400 - 10200)	11000 (4400 - 13000)	18000 (4300 - 21200)	21200 (6000 - 22200)
						W	2570 (1300 - 3000)	3220 (1300 - 3800)	5270 (1260 - 6200)	6210 (1750 - 6500)
	Nominal Heating Capacity (Min. ~ Max.)					Btu/h	9400 (4400 - 13600)	11300 (4400 - 16200)	17900 (4000 - 22500)	21200 (4100 - 27300)
						W	2750 (1300 - 4000)	3310 (1300 - 4750)	5240 (1170 - 6600)	6210 (1200 - 8000)
	Nominal Total Input Power (Cooling)					W	800	1294	1710	1927
	Nominal Total Input Power (Heating)					W	774	1004	1590	1688
	Nominal Running Current (Cooling)					A	3.60	5.79	7.48	8.47
	Nominal Running Current (Heating)					A	3.51	4.60	7.03	7.56
	SEER						17	17	17	17
	EER					(Btu/h)/W	11.00	8.50	10.50	11.00
	COP					(Btu/h)/W	12.15	11.26	11.26	12.56
	HSPF						9	9	9	9
	Power Supply					V/Ph/Hz	208/230/1/60	208/230/1/60	208/230/1/60	208/230/1/60
			Airflow (H/M/L/T/Q) (Cooling)			cfm	330/272/215/378/165	360/282/232/392/165	430/374/318/486/274	555/486/405/605/336
	UNIT		Airflow (H/M/L/T/Q) (Heating)			cfm	330/272/215/378/165	360/282/232/392/165	435/374/318/486/274	580/486/405/605/336
			Sound Pressure Level (H/M/L/T/Q)			dB(A)	42/35/30/43/23	42/35/32/43/22	40/37/35/43/32	47/44/41/49/37
	INDOOR
			Height			in. (mm)	11-11/16 (297)	11-11/16 (297)	12-5/8 (320)	12-5/8 (320)
			Width			in. (mm)	35-1/16 (890)	35-1/16 (890)	46-1/8 (1172)	46-1/8 (1172)
			Depth			in. (mm)	8-1/4 (210)	8-1/4 (210)	9-1/2 (242)	9-1/2 (242)
			Machine Weight			lbs (kg)	20 (9)	20 (9)	31 (14)	31 (14)
	UNIT		Sound Pressure Level			dB(A)	46	48	53	52
			Height			in. (mm)	21-5/8 (550)	21-5/8 (550)	25-11/16 (651)	29-11/16 (753)
	OUTDOOR
			Width			in. (mm)	25-15/16 (658)	25-15/16 (658)	33-11/16 (855)	33-11/16 (855)
			Depth			in. (mm)	10-3/4 (273)	10-3/4 (273)	12-15/16 (328)	12-15/16 (328)
			Machine Weight			lbs (kg)	53 (24)	57 (26)	82 (37)	97 (44)
	Piping Connections				Liquid	in. (mm)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)
					Gas	in. (mm)	3/8 (9.52)	3/8 (9.52)	1/2 (12.70)	5/8 (15.88)
	Operation Range				Cooling	°F	50 ~115	50 ~115	14 ~115	14 ~115
					Heating	°F	5 ~ 64.4	5 ~ 64.4	5 ~ 64.4	5 ~ 64.4
	Model			Indoor unit			FTXN09AXVJU	FTXN12AXVJU	FTXN18AXVJU	FTXN24AXVJU
				Outdoor unit			RXN09AXVJU	RXN12AXVJU	RXN18AXVJU	RXN24AXVJU
	Nominal Cooling Capacity (Min. ~ Max.)					Btu/h	8800 (4400 - 10200)	11000 (4400 - 13000)	18000 (4300 - 21200)	21200 (6000 - 22200)
						W	2570 (1300 - 3000)	3220 (1300 - 3800)	5270 (1260 - 6200)	6210 (1750 - 6500)
	Nominal Heating Capacity (Min. ~ Max.)					Btu/h	9400 (4400 - 13600)	11300 (4400 - 16200)	17900 (4000 - 22500)	21200 (4100 - 27300)
						W	2750 (1300 - 4000)	3310 (1300 - 4750)	5240 (1170 - 6600)	6210 (1200 - 8000)
	Nominal Total Input Power (Cooling)					W	800	1294	1710	1927
	Nominal Total Input Power (Heating)					W	774	1004	1590	1688
	Nominal Running Current (Cooling)					WWA	3.60	5.79	7.48	8.47
	Nominal Running Current (Heating)					A	3.51	4.60	7.03	7.56
	SEER						17	17	17	17
	EER					(Btu/h)/W	11.00	8.50	10.50	11.00
	COP					(Btu/h)/W	12.15	11.26	11.26	12.56
	HSPF						9	9	9	9
	Power Supply					V/Ph/Hz	208/230/1/60	208/230/1/60	208/230/1/60	208/230/1/60
			Airflow (H/M/L/T/Q) (Cooling)			cfm	330/272/215/378/165	360/282/232/392/165	430/374/318/486/274	555/486/405/605/336
	UNIT		Airflow (H/M/L/T/Q) (Heating)			cfm	330/272/215/378/165	360/282/232/392/165	435/374/318/486/274	580/486/405/605/336
			Sound Pressure Level (H/M/L/T/Q)			dB(A)	42/35/30/43/23	42/35/32/43/22	40/37/35/43/32	47/44/41/49/37
	INDOOR
			Height			in. (mm)	11-5/16 (288)	11-5/16 (288)	12-3/16 (310)	12-3/16 (310)
			Width			in. (mm)	33-13/16 (859)	33-13/16 (859)	44-1/4 (1124)	44-1/4 (1124)
			Depth			in. (mm)	8-1/4 (209)	8-1/4 (209)	9-5/16 (237)	9-5/16 (237)
			Machine Weight			lbs (kg)	20 (9)	20 (9)	31 (14)	31 (14)
	UNIT		Sound Pressure Level			dB(A)	46	48	53	52
			Height			in. (mm)	21-5/8 (550)	21-5/8 (550)	25-11/16 (651)	29-11/16 (753)
	OUTDOOR
			Width			in. (mm)	25-15/16 (658)	25-15/16 (658)	33-11/16 (855)	33-11/16 (855)
			Depth			in. (mm)	10-3/4 (273)	10-3/4 (273)	12-15/16 (328)	12-15/16 (328)
			Machine Weight			lbs (kg)	53 (24)	57 (26)	82 (37)	97 (44)
	Piping Connections				Liquid	in. (mm)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)	1/4 (6.35)
					Gas	in. (mm)	3/8 (9.52)	3/8 (9.52)	1/2 (12.70)	5/8 (15.88)
	Operation Range				Cooling	°F	50 ~115	50 ~115	14 ~115	14 ~115
					Heating	°F	5 ~ 64.4	5 ~ 64.4	5 ~ 64.4	5 ~ 64.4

16

Algorithm & Control

2.0Function & Control

2.1Temperature Control

The temperature is detected by the room temperature thermistor (either on the unit or on the wired panel). The set temperature can be selected either through remote controller or wired controller by user.

Target temperature

Room thermistor temperature

Set temperature

Room temperature

2.2 Cooling and Heating Mode Operation

The system has 5 operating modes. The mode selection is done through the indoor by using the remote controller.

The operating modes are:

•Cool

•Heat

•Fan

•Auto

•Dry

2.2.1 Cooling Mode

When Tr ≥ Ts + 1.5°C (2.7°F)

• Compressor, Indoor Fan and Outdoor Fan ON.

When Tr ≤ Ts - 2°C (3.6°F)

• Compressor and Outdoor Fan OFF. Indoor Fan remained ON.

Tr = Room Temperature

Ts = Set Temperature

When cooling load is too small and the room temperature still drops below compressor cut off point, compressor will stop.

Compressor Capacity

Lowest Frequency

Time

T Ts - 2°C (3.6°F)

Compressor will stop

17

Algorithm & Control

2.2.2 Heating Mode:

When Ts > Tr - 1.0°C (1.8°F)

• Compressor, Indoor Fan and Outdoor Fan ON.

When Ts ≤ Tr - 1.5°C (2.7°F)

• Compressor and Outdoor Fan OFF. Indoor Fan speed will change to Super Low.

Tr = Room Temperature

Ts = Set Temperature

When heating load is too small, and the room temperature is still rising above compressor cut off point, compressor will stop.

Compressor Capacity

Lowest Frequency

Time

Tr - T (2.7°F)

Compressor will stop

2.3 Dry Mode

Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable.

The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones. Then, the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level.

							X
			Zone C = Thermostat ON
							Z
	Zone B					Zone B
		Y
						+0.5°C (0.9°F)
			Zone A= Thermostat OFF
Target temperature X	Thermostat OFF point Y						Thermostat ON point Z*
Setting temperature	Room thermistor temperature – X =					Room thermistor temperature – X =
	-2°C (3.6°F)						-0.5°C (0.9°F)

*Thermostat turns on also when the room temperature is in the zone B for 2 minutes.

18