Daikin FTXM-V Series User manual

[Applied Models]
Inverter Pair : Heat Pump
Inverter Pair
Wall Mounted Type FTXM-V Series
Service
Manual
SiUS042113E

SiUS042113E
iTable of Contents
Introduction ....................................................................................... 1
1. Safety Cautions...........................................................................................2
1.1 Warnings and Cautions Regarding Safety of Workers................................. 2
1.2 Warnings and Cautions Regarding Safety of Users..................................... 4
2. Icons Used ..................................................................................................7
3. Revision History ..........................................................................................8
Part 1 General Information ............................................................... 9
1. Applicable Models .....................................................................................10
2. Functions...................................................................................................11
Part 2 Specifications....................................................................... 12
1. Specifications ............................................................................................13
Part 3 Printed Circuit Board Connector Wiring Diagram................ 15
1. Indoor Unit.................................................................................................16
2. Outdoor Unit..............................................................................................20
2.1 09/12 class ................................................................................................. 20
2.2 18/24 class ................................................................................................. 21
Part 4 Functions and Control .......................................................... 23
1. Main Functions..........................................................................................24
1.1 Temperature Control .................................................................................. 24
1.2 Frequency Principle.................................................................................... 24
1.3 Airflow Direction Control............................................................................. 26
1.4 COMFORT AIRFLOW Operation ............................................................... 27
1.5 Fan Speed Control for Indoor Unit ............................................................. 29
1.6 Hybrid Cooling............................................................................................ 30
1.7 Automatic Cooling/Heating Changeover .................................................... 33
1.8 Thermostat Control..................................................................................... 34
1.9 NIGHT SET Mode ...................................................................................... 35
1.10 ECONO Operation .................................................................................... 35
1.11 2-Area INTELLIGENT EYE Operation ....................................................... 36
1.12 INTELLIGENT EYE Operation ................................................................... 40
1.13 POWERFUL Operation .............................................................................. 42
1.14 Clock Setting .............................................................................................. 43
1.15 WEEKLY TIMER Operation ....................................................................... 44
1.16 Brightness Setting of Indoor Unit Display................................................... 50
1.17 CLEAN Operation....................................................................................... 51
1.18 Wireless LAN Connection .......................................................................... 53
1.19 Other Functions.......................................................................................... 58
2. Thermistor Functions ................................................................................59
3. Control Specification .................................................................................61
3.1 Mode Hierarchy .......................................................................................... 61

SiUS042113E
Table of Contents ii
3.2 Frequency Control...................................................................................... 61
3.3 Standby Electricity Saving (Suspend Function) ......................................... 63
3.4 Controls at Mode Changing/Start-up.......................................................... 64
3.5 Discharge Pipe Temperature Control......................................................... 66
3.6 Input Current Control.................................................................................. 67
3.7 Freeze-up Protection Control ..................................................................... 68
3.8 Heating Peak-cut Control ........................................................................... 68
3.9 High Pressure Protection Control............................................................... 69
3.10 Outdoor Fan Control................................................................................... 70
3.11 Liquid Compression Protection Function.................................................... 70
3.12 Defrost Control ........................................................................................... 71
3.13 Electronic Expansion Valve Control ........................................................... 72
3.14 Malfunctions ............................................................................................... 75
Part 5 Remote Controller ................................................................ 76
1. Applicable Remote Controller ...................................................................77
2. ARC466A70 ..............................................................................................78
3. ARC466A71 ..............................................................................................80
Part 6 Service Diagnosis ................................................................. 82
1. General Problem Symptoms and Check Items .........................................84
2. Troubleshooting with LED .........................................................................85
2.1 Indoor Unit.................................................................................................. 85
2.2 Outdoor Unit ............................................................................................... 85
3. Service Diagnosis .....................................................................................86
3.1 Method 1 .................................................................................................... 86
3.2 Method 2 .................................................................................................... 87
4. Troubleshooting ........................................................................................89
4.1 Error Codes and Description ...................................................................... 89
4.2 Indoor Unit PCB Abnormality ..................................................................... 90
4.3 Freeze-up Protection Control/Heating Peak-cut Control ............................ 91
4.4 Indoor Fan Motor (DC Motor) or Related Abnormality ............................... 93
4.5 Thermistor or Related Abnormality............................................................. 95
4.6 Humidity Sensor Abnormality ..................................................................... 96
4.7 Refrigerant Shortage .................................................................................. 97
4.8 Low-voltage Detection or Over-voltage Detection...................................... 99
4.9 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 101
4.10 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) ................. 103
4.11 Outdoor Unit PCB Abnormality................................................................. 104
4.12 Actuation of High Pressure Switch ........................................................... 105
4.13 OL Activation (Compressor Overload) ..................................................... 106
4.14 Compressor Lock ..................................................................................... 109
4.15 DC Fan Lock ............................................................................................ 110
4.16 Input Overcurrent Detection ..................................................................... 111
4.17 Four Way Valve Abnormality.................................................................... 113
4.18 Discharge Pipe Temperature Control....................................................... 115
4.19 High Pressure Control in Cooling ............................................................. 117

SiUS042113E
iii Table of Contents
4.20 System Shutdown due to Temperature Abnormality in Compressor ....... 119
4.21 Compressor System Sensor Abnormality ................................................ 120
4.22 Position Sensor Abnormality .................................................................... 121
4.23 DC Voltage/Current Sensor Abnormality.................................................. 124
4.24 Thermistor or Related Abnormality (Outdoor Unit)................................... 126
4.25 Electrical Box Temperature Rise.............................................................. 128
4.26 Radiation Fin Temperature Rise .............................................................. 129
4.27 Output Overcurrent Detection .................................................................. 131
5. Check ......................................................................................................134
5.1 Thermistor Resistance Check .................................................................. 134
5.2 Indoor Fan Motor Connector Check ......................................................... 135
5.3 Power Supply Waveform Check............................................................... 135
5.4 Electronic Expansion Valve Check........................................................... 136
5.5 Four Way Valve Performance Check ....................................................... 137
5.6 Inverter Unit Refrigerant System Check................................................... 138
5.7 Inverter Analyzer Check ........................................................................... 138
5.8 Rotation Pulse Check on the Outdoor Unit PCB ...................................... 140
5.9 Installation Condition Check..................................................................... 141
5.10 Discharge Pressure Check....................................................................... 142
5.11 Outdoor Fan System Check ..................................................................... 142
5.12 Main Circuit Short Check.......................................................................... 142
5.13 Capacitor Voltage Check.......................................................................... 144
5.14 Power Module Check ............................................................................... 145
Part 7 Trial Operation and Field Settings ..................................... 147
1. Pump Down Operation............................................................................148
2. Forced Cooling Operation.......................................................................149
3. Trial Operation ........................................................................................150
4. Field Settings ..........................................................................................152
4.1 Temperature Display Switch .................................................................... 152
4.2 When 2 Units are Installed in 1 Room...................................................... 152
4.3 Facility Setting (cooling at low outdoor temperature) ............................... 153
4.4 Drain Pan Heater...................................................................................... 154
4.5 Service Mode of Wireless Remote Controller .......................................... 155
5. Silicone Grease on Power Transistor/Diode Bridge................................158
Part 8 Appendix ............................................................................. 159
1. Piping Diagrams......................................................................................160
1.1 Indoor Unit................................................................................................ 160
1.2 Outdoor Unit ............................................................................................. 161
2. Wiring Diagrams......................................................................................163
2.1 Indoor Unit................................................................................................ 163
2.2 Outdoor Unit ............................................................................................. 165
3. Operation Limit........................................................................................167

SiUS042113E
Introduction 1
1. Safety Cautions...........................................................................................2
1.1 Warnings and Cautions Regarding Safety of Workers................................. 2
1.2 Warnings and Cautions Regarding Safety of Users..................................... 4
2. Icons Used ..................................................................................................7
3. Revision History ..........................................................................................8
Introduction

Safety Cautions SiUS042113E
2Introduction
1. Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
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 Items The caution items are classified into Warning and Caution. The Warning items are
especially important since death or serious injury can result 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.
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 in the illustration or near the symbol.
This symbol indicates an action that must be taken, or an instruction.
The instruction is shown in the illustration or near the symbol.
1.1 Warnings and Cautions Regarding Safety of Workers
This manual is for the
person in charge of
maintenance and
inspection.
This appliance is
filled with R-32.
Warning
Do not store equipment in a room with fire sources (e.g., naked
flames, gas appliances, electric heaters).
Be sure to disconnect the power cable from the socket before
disassembling equipment for repair.
Working on equipment that is connected to the power supply may cause
an electrical shock.
If it is necessary to supply power to the equipment to conduct the repair or
inspect the circuits, do not touch any electrically charged sections of the
equipment.
If refrigerant gas is discharged during repair work, do not touch the
discharged refrigerant gas.
Refrigerant gas may cause frostbite.
When disconnecting the suction or discharge pipe of the
compressor at the welded section, evacuate the refrigerant gas
completely at a well-ventilated place first.
If there is gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges when the pipe is disconnected, and it
may cause injury.
If refrigerant gas leaks during repair work, ventilate the area.
Refrigerant gas may generate toxic gases when it contacts flames.

SiUS042113E Safety Cautions
Introduction 3
Be sure to discharge the capacitor completely before conducting
repair work.
The step-up capacitor supplies high-voltage electricity to the electrical
components of the outdoor unit.
A charged capacitor may cause an electrical shock.
Do not turn the air conditioner on or off by plugging in or
unplugging the power cable.
Plugging in or unplugging the power cable to operate the equipment may
cause an electrical shock or fire.
Be sure to wear a safety helmet, gloves, and a safety belt when
working in a high place (more than 2 m (6.5 ft)).
Insufficient safety measures may cause a fall.
In case of R-32 / R-410A refrigerant models, be sure to use pipes,
flare nuts and tools intended for the exclusive use with the R-32 /
R-410A refrigerant.
The use of materials for R-22 refrigerant models may cause a serious
accident, such as a damage of refrigerant cycle or equipment failure.
Do not mix air or gas other than the specified refrigerant (R-32 /
R-410A / R-22) in the refrigerant system.
If air enters the refrigerant system, an excessively high pressure results,
causing equipment damage and injury.
Caution
Do not repair electrical components with wet hands.
Working on the equipment with wet hands may cause an electrical shock.
Do not clean the air conditioner with water.
Washing the unit with water may cause an electrical shock.
Be sure to provide an earth / 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 may cause injury.
Be sure to conduct repair work with appropriate tools.
The use of inappropriate tools may cause injury.
Warning

Safety Cautions SiUS042113E
4Introduction
1.2 Warnings and Cautions Regarding Safety of Users
Be sure to check that the refrigerating cycle section has cooled
down enough before conducting repair work.
Working on the unit when the refrigerating cycle section is hot may cause
burns.
Conduct welding work in a well-ventilated place.
Using the welder in an enclosed room may cause oxygen deficiency.
Caution
Warning
Do not store the equipment in a room with fire sources (e.g., naked
flames, gas appliances, electric heaters).
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 may cause an electrical shock,
excessive heat generation or fire.
If the power cable and lead wires are scratched or have deteriorated,
be sure to replace them.
Damaged cable and wires may 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 may
cause an electrical shock, excessive heat generation or fire.
Be sure to use an exclusive power circuit for the equipment, and
follow the local 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 may cause
an electrical shock or fire.
Be sure to use the specified cable for wiring 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 may cause excessive heat generation or fire.
When wiring 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 may
cause an electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cables may cause an electrical shock or fire.
Placing heavy items on the power cable, or heating or pulling the power
cable may damage it.

SiUS042113E Safety Cautions
Introduction 5
Do not mix air or gas other than the specified refrigerant (R-32 /
R-410A / R-22) in the refrigerant system.
If air enters the refrigerant system, an excessively high pressure results,
causing equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leaking point and
repair it before charging the refrigerant. After charging the
refrigerant, make sure that there is no leak.
If the leaking point cannot be located and the repair work must be
stopped, be sure to pump-down, and close the service valve, to prevent
refrigerant gas from leaking into the room. Refrigerant gas itself is
harmless, but it may generate toxic gases when it contacts flames, such
as those from fan type and other heaters, stoves and ranges.
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 or the installation
work is not conducted securely, the equipment may fall and cause injury.
Check to make sure that the power cable plug is not dirty or loose,
then insert the plug into a power outlet securely.
If the plug is dusty or has a loose connection, it may cause an electrical
shock or fire.
When replacing the coin battery in the remote controller, be sure to
dispose of the old battery to prevent children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
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 combustible gas leaks and remains around the unit, it may cause a fire.
Check to see if parts and wires are mounted and connected
properly, and if connections at the soldered or crimped terminals
are secure.
Improper installation and connections may cause excessive heat
generation, fire or an electrical shock.
If the installation platform or frame has corroded, replace it.
A corroded installation platform or frame may cause the unit to fall,
resulting in injury.
Check the earth / grounding, and repair it if the equipment is not
properly earthed / grounded.
Improper earth / grounding may cause an electrical shock.
Warning

Safety Cautions SiUS042113E
6Introduction
Be sure to measure insulation resistance after the repair, and make
sure that the resistance is 1 M or higher.
Faulty insulation may cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage may cause water to enter the room and wet the furniture
and floor.
Do not tilt the unit when removing it.
The water inside the unit may spill and wet the furniture and floor.
Caution

SiUS042113E Icons Used
Introduction 7
2. Icons Used
The following icons are used to attract the attention of the reader to specific information.
Icon Type of
Information
Description
Warning
Warning Warning is used when there is danger of personal injury.
Caution
Caution Caution is used when there is danger that the reader,
through incorrect manipulation, may damage equipment,
lose data, get an unexpected result or have to restart (part
of) a procedure.
Note
Note Note provides information that is not indispensable, but
may nevertheless be valuable to the reader, such as tips
and tricks.
Reference
Reference Reference guides the reader to other places in this binder
or in this manual, where he/she will find additional
information on a specific topic.

Revision History SiUS042113E
8Introduction
3. Revision History
Month/Year Version Revised contents
04 / 2021 SiUS042113E First edition

SiUS042113E
Part 1 General Information 9
1. Applicable Models .....................................................................................10
2. Functions...................................................................................................11
Part 1
General Information

Applicable Models SiUS042113E
10 Part 1 General Information
1. Applicable Models
Indoor Unit
Outdoor Unit
FTXM09VVJU
FTXM12VVJU
FTXM18VVJU
FTXM24VVJU
RXM09VVJU
RXM12VVJU
RXM18VVJU
RXM24VVJU

SiUS042113E Functions
Part 1 General Information 11
2. Functions
Category Functions FTXM-V series
09/12 class 18/24 class
Basic Functions Inverter (with inverter power control) 
Operation limit Refer to page 167
Standby electricity saving 
Compressor Swing compressor 
Reluctance DC motor 
Comfortable
Airflow
Power-airflow dual flaps 
Wide-angle louvers 
Auto-swing (up and down) 
Auto-swing (right and left) 
3-D airflow 
COMFORT AIRFLOW operation (COANDA flap) 
Draftless airflow in heating 
Comfort Control Auto fan speed 
Switchable fan speed 
Indoor unit quiet operation 
OUTDOOR UNIT QUIET operation (manual) 
INTELLIGENT EYE operation (auto energy saving) 
2-area INTELLIGENT EYE operation (focus and comfort) —
Quick warming function (preheating operation) — 
Hot-start function 
Automatic defrosting 
Fan stop when thermo-off in cooling 
Automatic operation (cooling and heating) 
Program dry function — —
Hybrid cooling (dehumidifying function) 
Fan operation 
Lifestyle
Convenience
Inverter powerful operation 
ECONO operation 
Indoor unit ON/OFF button 
Signal reception indicator 
Health and
Cleanliness
Titanium apatite deodorizing filter 
Mold proof air filter 
Wipe-clean flat panel 
CLEAN (mold proof) operation 11
Removable drain pan 
Remote Control
and Timer
WEEKLY TIMER operation 
Count up-down ON/OFF timer 
24-hour ON/OFF TIMER 
NIGHT SET mode 
R/C with back light 
°F/°C changeover R/C temperature display (factory setting: °F) 
Wireless LAN adaptor (built in) 
DIII-NET compatible (adaptor) option option
Worry Free
(Reliability &
Durability)
Auto-restart (after power failure) 
Self-diagnosis with R/C 
Anti-corrosion treatment of outdoor heat exchanger 
Flexibility Chargeless 49.2 ft (15 m) 49.2 ft (15 m)
Either side drain (right or left) 
Year-round cooling applicable (–20°C(4°F)) 2
Remote Control Wireless 
Wired option option

—
1
2
: Available
: Not available
: Factory setting Off
: This operation limit is allowed by installing the air direction adjustment grille (option).

SiUS042113E
12 Part 2 Specifications
1. Specifications ............................................................................................13
Part 2
Specifications

SiUS042113E Specifications
Part 2 Specifications 13
1. Specifications
Model Indoor Unit FTXM09VVJU FTXM12VVJU
Outdoor Unit RXM09VVJU RXM12VVJU
Cooling Heating Cooling Heating
Power Supply Phase 1 1 
Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V
Capacity Rated (Min. - Max.) Btu/h 9,000 (4,400 ~ 12,500) 11,000 (4,400 ~ 19,500) 12,000 (4,800 ~ 16,000) 13,600 (4,800 ~ 22,600)
Power Consumption (Rated) W 552 701 909 906
Power Factor (Rated) % 92.5 94.6 96.2 96.8
SEER / HSPF 27.40 13.80 25.20 13.00
EER (Rated) Btu/Wh 16.30 — 13.20 —
COP (Rated) W/W — 4.60 — 4.40
Piping
Connection
Liquid in. (mm)  1/4 (6.4)  1/4 (6.4)
Gas in. (mm)  3/8 (9.5)  3/8 (9.5)
Drain in. (mm)  5/8 (16)  5/8 (16)
Max. Interunit Piping Length ft (m) 82-1/64 (25) 82-1/64 (25)
Max. Interunit Height Difference ft (m) 65-5/8 (20) 65-5/8 (20)
Chargeless ft (m) 49.2 (15) 49.2 (15)
Amount of Additional Charge of
Refrigerant
oz/ft
(g/m) 0.22 (20) 0.22 (20)
Indoor Unit FTXM09VVJU FTXM12VVJU
Front Panel Color (Munsell No.) White (N-9.5) White (N-9.5)
Airflow Rates H
cfm
(m³/min)
515 (14.6) 515 (14.6) 557 (15.8) 557 (15.8)
M 340 (9.6) 370 (10.5) 394 (11.2) 412 (11.7)
L 249 (7.1) 304 (8.6) 292 (8.3) 340 (9.6)
SL 219 (6.2) 249 (7.1) 225 (6.4) 255 (7.2)
Fan Type Cross Flow Fan Cross Flow Fan
Speed Steps 5 Steps, Quiet, Auto 5 Steps, Quiet, Auto
Heat Exchanger Type Multi Slit Fin Multi Slit Fin
Rows × Stages, Fin Pitch
(mm)
2 × 18, 1.4
1 × 8, 1.4
1 × 4, 1.4
2 × 18, 1.4
1 × 8, 1.4
1 × 4, 1.4
Dimensions (H × W × D) in. (mm) 11-3/4 × 36-1/4 × 10-13/16 (299 × 920 × 275) 11-3/4 × 36-1/4 × 10-13/16 (299 × 920 × 275)
Packaged Dimensions (H × W × D) in. (mm) 14-15/16 × 39-3/4 × 15-3/8 (380 × 1,010 × 391) 14-15/16 × 39-3/4 × 15-3/8 (380 × 1,010 × 391)
Weight (Mass) Lbs (kg) 29 (13) 29 (13)
Gross Weight (Gross Mass) Lbs (kg) 38 (17) 38 (17)
Sound Pressure Level (H / M / L / SL) dB(A) 43 / 33 / 25 / 22 43 / 35 / 30 / 25 45 / 37 / 29 / 23 45 / 39 / 32 / 26
Outdoor Unit RXM09VVJU RXM12VVJU
Casing Color Ivory White Ivory White
Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type
Model 2Y147BKCX1A 2Y147BKCX1A
Refrigerant Oil Type FW50DA FW50DA
Charge oz (L) 15.17 (0.430) 15.17 (0.430)
Refrigerant Type R-32 R-32
Charge Lbs (kg) 2.16 (0.98) 2.16 (0.98)
Airflow Rates H / SL cfm
(m³/min)
1,317 / 1,183
(37.3 / 33.5)
1,296 / 922
(36.7 / 26.1)
1,487 / 1,317
(42.1 / 37.3)
1,487 / 922
(42.1 / 26.1)
Fan Type Propeller Propeller
Heat Exchanger Type Waffle Fin Waffle Fin
Rows × Stages, Fin Pitch
(mm) 2 × 26, 1.4 2 × 26, 1.4
Dimensions (H × W × D) in. (mm) 23-7/16 × 33-1/4 × 11-13/16 (595 × 845 × 300) 23-7/16 × 33-1/4 × 11-13/16 (595 × 845 × 300)
Packaged Dimensions (H × W × D) in. (mm) 26 × 39-5/8 × 16-15/16 (660 × 1,007 × 430) 26 × 39-5/8 × 16-15/16 (660 × 1,007 × 430)
Weight (Mass) Lbs (kg) 96 (44) 96 (44)
Gross Weight (Gross Mass) Lbs (kg) 103 (47) 103 (47)
Sound Pressure Level (H / SL) dB(A) 47 / — 49 / — 49 / — 52 / —
Conditions Based on Indoor ; 80°FDB (26.7°CDB) /
67°FWB (19.4°CWB)
Outdoor ; 95°FDB (35°CDB) /
75°FWB (24°CWB)
Piping Length: 25 ft (7.5 m)
Indoor ; 70°FDB (21.1°CDB) /
60°FWB (15.6°CWB)
Outdoor ; 47°FDB (8.3°CDB)
/ 43°FWB (6.1°CWB)
Piping Length: 25 ft (7.5 m)
Indoor ; 80°FDB (26.7°CDB) /
67°FWB (19.4°CWB)
Outdoor ; 95°FDB (35°CDB) /
75°FWB (24°CWB)
Piping Length: 25 ft (7.5 m)
Indoor ; 70°FDB (21.1°CDB) /
60°FWB (15.6°CWB)
Outdoor ; 47°FDB (8.3°CDB)
/ 43°FWB (6.1°CWB)
Piping Length: 25 ft (7.5 m)
Drawing No. 3D133578A 3D133578A
Notes SL: The quiet fan level of the airflow rate setting. SL: The quiet fan level of the airflow rate setting.
Conversion Formulae
kcal/h = kW × 860
Btu/h = kW × 3412
cfm = m³/min × 35.3

Specifications SiUS042113E
14 Part 2 Specifications
Model Indoor Unit FTXM18VVJU FTXM24VVJU
Outdoor Unit RXM18VVJU RXM24VVJU
Cooling Heating Cooling Heating
Power Supply Phase 1 1 
Hz, V 60 Hz, 208 - 230 V 60 Hz, 208 - 230 V
Capacity Rated (Min. - Max.) Btu/h 18,000 (9,000 ~ 22,000) 21,600 (9,000 ~ 30,200) 21,600 (9,000 ~ 26,000) 24,000 (9,000 ~ 32,200)
Power Consumption (Rated) W 1,440 1,665 1,728 1,986
Power Factor (Rated) % 95.4 97.6 97.3 99
SEER / HSPF 22.70 12.50 22.00 12.50
EER (Rated) Btu/Wh 12.50 — 12.50 —
COP (Rated) W/W — 3.80 — 3.54
Piping
Connection
Liquid in. (mm)  1/4 (6.4)  1/4 (6.4)
Gas in. (mm)  1/2 (12.7)  5/8 (15.9)
Drain in. (mm)  5/8 (16)  5/8 (16)
Max. Interunit Piping Length ft (m) 98-1/2 (30) 98-1/2 (30)
Max. Interunit Height Difference ft (m) 82-1/64 (25) 82-1/64 (25)
Chargeless ft (m) 49.2 (15) 49.2 (15)
Amount of Additional Charge of
Refrigerant
oz/ft
(g/m) 0.22 (20) 0.22 (20)
Indoor Unit FTXM18VVJU FTXM24VVJU
Front Panel Color (Munsell No.) White (N-9.5) White (N-9.5)
Airflow Rates H
cfm
(m³/min)
776 (22.0) 776 (22.0) 845 (23.9) 845 (23.9)
M 583 (16.5) 559 (15.8) 652 (18.5) 606 (17.2)
L 482 (13.7) 467 (13.2) 498 (14.1) 498 (14.1)
SL 428 (12.1) 413 (11.7) 451 (12.8) 451 (12.8)
Fan Type Cross Flow Fan Cross Flow Fan
Speed Steps 5 Steps, Quiet, Auto 5 Steps, Quiet, Auto
Heat Exchanger Type Multi Slit Fin Multi Slit Fin
Rows × Stages, Fin Pitch
(mm)
2 × 18, 1.4
1 × 8, 1.4
1 × 4, 1.4
2 × 18, 1.4
1 × 8, 1.4
1 × 4, 1.4
Dimensions (H × W × D) in. (mm) 11-3/4 × 43-5/16 × 10-13/16 (299 × 1,100 × 275) 11-3/4 × 43-5/16 × 10-13/16 (299 × 1,100 × 275)
Packaged Dimensions (H × W × D) in. (mm) 15-13/16 × 47-11/16 × 15-1/2 (401 × 1,212 × 393) 15-13/16 × 47-11/16 × 15-1/2 (401 × 1,212 × 393)
Weight (Mass) Lbs (kg) 33 (15) 33 (15)
Gross Weight (Gross Mass) Lbs (kg) 46 (21) 46 (21)
Sound Pressure Level (H / M / L / SL) dB(A) 49 / 41 / 36 / 33 49 / 40 / 35 / 32 51 / 44 / 37 / 34 51 / 42 / 37 / 34
Outdoor Unit RXM18VVJU RXM24VVJU
Casing Color Ivory White Ivory White
Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type
Model 2Y260BPBX1A 2Y260BPBX1A
Refrigerant Oil Type FW68DA FW68DA
Charge oz (L) 31.75 (0.900) 31.75 (0.900)
Refrigerant Type R-32 R-32
Charge Lbs (kg) 2.98 (1.35) 2.98 (1.35)
Airflow Rates H / SL cfm
(m³/min)
2,119 / 1,833
(60.0 / 51.9)
2,062 / 1,773
(58.4 / 50.2)
2,179 / 1,833
(61.7 / 51.9)
2,119 / 1,833
(60.0 / 51.9)
Fan Type Propeller Propeller
Heat Exchanger Type Waffle Fin Waffle Fin
Rows × Stages, Fin Pitch
(mm) 2 × 32, 1.4 2 × 32, 1.4
Dimensions (H × W × D) in. (mm) 28-15/16 × 34-1/4 × 12-5/8 (735 × 870 × 320) 28-15/16 × 34-1/4 × 12-5/8 (735 × 870 × 320)
Packaged Dimensions (H × W × D) in. (mm) 31-7/8 × 41-1/2 × 18-1/4 (810 × 1,056 × 464) 31-7/8 × 41-1/2 × 18-1/4 (810 × 1,056 × 464)
Weight (Mass) Lbs (kg) 132 (60) 132 (60)
Gross Weight (Gross Mass) Lbs (kg) 143 (65) 143 (65)
Sound Pressure Level (H / SL) dB(A) 54 / — 55 / — 55 / — 56 / —
Conditions Based on Indoor ; 80°FDB (26.7°CDB) /
67°FWB (19.4°CWB)
Outdoor ; 95°FDB (35°CDB) /
75°FWB (24°CWB)
Piping Length: 25 ft (7.5 m)
Indoor ; 70°FDB (21.1°CDB) /
60°FWB (15.6°CWB)
Outdoor ; 47°FDB (8.3°CDB)
/ 43°FWB (6.1°CWB)
Piping Length: 25 ft (7.5 m)
Indoor ; 80°FDB (26.7°CDB) /
67°FWB (19.4°CWB)
Outdoor ; 95°FDB (35°CDB) /
75°FWB (24°CWB)
Piping Length: 25 ft (7.5 m)
Indoor ; 70°FDB (21.1°CDB) /
60°FWB (15.6°CWB)
Outdoor ; 47°FDB (8.3°CDB)
/ 43°FWB (6.1°CWB)
Piping Length: 25 ft (7.5 m)
Drawing No. 3D133579 3D133579
Notes SL: The quiet fan level of the airflow rate setting. SL: The quiet fan level of the airflow rate setting.
Conversion Formulae
kcal/h = kW × 860
Btu/h = kW × 3412
cfm = m³/min × 35.3

SiUS042113E
Part 3 Printed Circuit Board Connector Wiring Diagram 15
1. Indoor Unit.................................................................................................16
2. Outdoor Unit..............................................................................................20
2.1 09/12 class ................................................................................................. 20
2.2 18/24 class ................................................................................................. 21
Part 3
Printed Circuit Board
Connector Wiring Diagram

Indoor Unit SiUS042113E
16 Part 3 Printed Circuit Board Connector Wiring Diagram
1. Indoor Unit
Control PCB
(A1P) 1) S16 Connector for optional adaptor
2) S21 Connector for optional adaptor
3) S200 Connector for DC fan motor
4) S300A, S301B Connector for power supply PCB (A2P)
5) S400 Connector for swing motors
6) S501 Connector for indoor heat exchanger thermistor (R1T)
7) S600 Connector for humidity sensor PCB (A4P)
8) S602 Connector for INTELLIGENT EYE sensor PCB (A5P)
9) S800 Connector for display/signal receiver PCB (A3P)
10) S801 Connector for wireless LAN connection PCB (A6P)
S501
S300A
S301B
S400
S200
S21
S16
S600
S800 S801
S602
2P578254-10
2P578254-11