Daikin FTXS09DVJU User manual

SiUS04 - 702
[Applied Models]
zInverter Pair : Heat Pump
Inverter Pair
Wall MountedType D-Series

SiUS04-702
Table of Contents i
Inverter Pair
D-Series
zHeat Pump
Indoor Unit
FTXS09DVJU
FTXS12DVJU
FTXS15DVJU
FTXS18DVJU
FTXS24DVJU
Outdoor Unit
RX09FVJU
RX12FVJU
RX15FVJU
RX18FVJU
RX24FVJU

SiUS04-702
ii Table of Contents
1. Introduction ............................................................................................... vi
1.1 Safety Cautions...........................................................................................vi
1.2 Used Icons ...................................................................................................x
Part 1 List of Functions ...................................................................1
1. List of Functions.........................................................................................2
Part 2 Specifications .......................................................................3
1. Specifications.............................................................................................4
Part 3 Printed Circuit Board Connector Wiring Diagram ................7
1. Printed Circuit Board Connector Wiring Diagram.......................................8
1.1 FTXS09/12DVJU......................................................................................... 8
1.2 FTXS15/18/24DVJU.................................................................................. 10
1.3 RX09/12FVJU ........................................................................................... 12
1.4 RX15/18/24FVJU ...................................................................................... 14
Part 4 Function and Control...........................................................17
1. Main Functions.........................................................................................19
1.1 Frequency Principle................................................................................... 19
1.2 Power-Airflow Dual Flaps, Wide-Angle Louvres and Auto-Swing............. 21
1.3 Fan Speed Control for Indoor Units........................................................... 22
1.4 Programme Dry Function.......................................................................... 23
1.5 Automatic Operation.................................................................................. 24
1.6 Thermostat Control.................................................................................... 25
1.7 NIGHT SET Mode ..................................................................................... 26
1.8 INTELLIGENT EYE................................................................................... 27
1.9 HOME LEAVE Operation .......................................................................... 29
1.10 Inverter POWERFUL Operation................................................................ 30
1.11 Other Functions......................................................................................... 31
2. Function of Thermistor.............................................................................33
2.1 Heat Pump Model...................................................................................... 33
3. Control Specification (09/12 Class)..........................................................34
3.1 Mode Hierarchy......................................................................................... 34
3.2 Frequency Control..................................................................................... 35
3.3 Controls at Mode Changing / Start-up....................................................... 37
3.4 Discharge Pipe Temperature Control........................................................ 38
3.5 Input Current Control................................................................................. 39
3.6 Freeze-up Protection Control .................................................................... 39
3.7 Heating Peak-cut Control.......................................................................... 40
3.8 Fan Control................................................................................................ 40
3.9 Liquid Compression Protection Function 2................................................ 40
3.10 Defrost Control.......................................................................................... 41
3.11 Electronic Expansion Valve Control.......................................................... 42
3.12 Malfunctions .............................................................................................. 45
3.13 Forced Operation Mode ............................................................................ 46

SiUS04-702
Table of Contents iii
3.14 Additional Function.................................................................................... 46
4. Control Specification (15/18/24 Class).....................................................47
4.1 Mode Hierarchy......................................................................................... 47
4.2 Frequency Control..................................................................................... 48
4.3 Controls at Mode Changing / Start-up....................................................... 50
4.4 Discharge Pipe Temperature Control........................................................ 51
4.5 Input Current Control................................................................................. 52
4.6 Freeze-up Protection Control .................................................................... 53
4.7 Heating Peak-cut Control.......................................................................... 53
4.8 Fan Control................................................................................................ 54
4.9 Liquid Compression Protection Function 2................................................ 54
4.10 Low Hz High Pressure Limit...................................................................... 55
4.11 Defrost Control.......................................................................................... 55
4.12 Electronic Expansion Valve Control.......................................................... 56
4.13 Malfunctions .............................................................................................. 59
4.14 Forced Operation Mode ............................................................................ 60
4.15 Additional Function.................................................................................... 60
Part 5 Operation Manual ................................................................61
1. System Configuration...............................................................................62
2. Instruction.................................................................................................63
2.1 Safety Precautions .................................................................................... 63
2.2 FTXS09/12DVJU....................................................................................... 65
2.3 FTXS15/18/24DVJU.................................................................................. 90
Part 6 Service Diagnosis..............................................................115
1. Caution for Diagnosis.............................................................................116
2. Problem Symptoms and Measures........................................................118
3. Service Check Function.........................................................................119
4. Troubleshooting .....................................................................................122
4.1 Error Codes and Description................................................................... 122
4.2 Indoor Unit PCB Abnormality .................................................................. 123
4.3 Freeze-up Protection Control or High Pressure Control.......................... 124
4.4 Fan Motor or Related Abnormality .......................................................... 126
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................... 129
4.6 Signal Transmission Error (between Indoor and Outdoor Unit) .............. 130
4.7 OL Activation (Compressor Overload) .................................................... 132
4.8 Compressor Lock.................................................................................... 133
4.9 DC Fan Lock ........................................................................................... 135
4.10 Input Over Current Detection .................................................................. 136
4.11 Four Way Valve Abnormality................................................................... 139
4.12 Discharge Pipe Temperature Control...................................................... 143
4.13 High Pressure Control in Cooling............................................................ 145
4.14 Position Sensor Abnormality................................................................... 149
4.15 DC Voltage / Current Sensor Abnormality............................................... 151
4.16 CT or Related Abnormality...................................................................... 152
4.17 Thermistor or Related Abnormality (Outdoor Unit).................................. 154

SiUS04-702
iv Table of Contents
4.18 Electrical Box Temperature Rise............................................................. 156
4.19 Radiation Fin Temperature Rise ............................................................. 158
4.20 Output Over Current Detection................................................................ 160
4.21 Insufficient Gas........................................................................................ 164
4.22 Over-voltage Detection............................................................................ 168
4.23 Low-voltage Detection............................................................................. 169
5. Check.....................................................................................................170
5.1 How to Check.......................................................................................... 170
Part 7 Removal Procedure ...........................................................181
1. FTXS09/12DVJU....................................................................................182
1.1 Removal of Air Filter................................................................................ 182
1.2 Removal of Front Grille ........................................................................... 185
1.3 Removal of Horizontal Blade and Vertical Blade..................................... 188
1.4 Removal of Electrical Box, PCB and Swing Motor.................................. 190
1.5 Removal of Heat Exchanger ................................................................... 196
1.6 Install of Drain Plug ................................................................................. 199
1.7 Removal of Fan Rotor and Fan Motor..................................................... 201
2. FTXS15/18/24DVJU...............................................................................205
2.1 Removal of the Air Filter / Front Panel .................................................... 205
2.2 Removal of the Front Grille ..................................................................... 209
2.3 Removal of the Horizontal Blades / Vertical Blades................................ 212
2.4 Removal of the Electrical Box / PCB / Swing Motor................................ 215
2.5 Removal of the Heat Exchanger ............................................................. 223
2.6 Removal of the Fan Rotor / Fan Motor.................................................... 226
3. RX09/12FVJU........................................................................................229
3.1 Removal of Panels and Fan Motor.......................................................... 229
3.2 Removal of Electrical Box ....................................................................... 237
3.3 Removal of Reactor and Partition Plate.................................................. 239
3.4 Removal of Sound Blanket...................................................................... 241
3.5 Removal of Four Way Valve.................................................................... 244
3.6 Removal of Compressor.......................................................................... 246
3.7 Removal of PCB...................................................................................... 249
4. RX15/18/24FVJU...................................................................................252
4.1 Removal of the Panels and Plates.......................................................... 252
4.2 Removal of the Fan Motor / Propeller Fan.............................................. 257
4.3 Removal of the PCB / Electrical Box....................................................... 261
4.4 Removal of the Reactor........................................................................... 270
4.5 Removal of the Sound Blanket................................................................ 272
4.6 Removal of the Four Way Valve.............................................................. 275
4.7 Removal of the Electronic Expansion Valve............................................ 276
4.8 Removal of the Compressor.................................................................... 277
Part 8 Others ................................................................................279
1. Others ....................................................................................................280
1.1 Test Run from the Remote Controller ..................................................... 280
1.2 Jumper Settings ...................................................................................... 281

SiUS04-702
Table of Contents v
Part 9 Appendix............................................................................283
1. Piping Diagrams.....................................................................................284
1.1 Indoor Units............................................................................................. 284
1.2 Outdoor Units .......................................................................................... 285
2. Wiring Diagrams.....................................................................................287
2.1 Indoor Units............................................................................................. 287
2.2 Outdoor Units .......................................................................................... 288
Index ................................................................................................i
Drawings & Flow Charts .................................................................vii

Introduction SiUS04-702
vi
1. Introduction
1.1 Safety Cautions
Cautions 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 the item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates the prohibited action.
The prohibited item or action is shown in the illustration or near the symbol.
This symbol indicates the action that must be taken, or the instruction.
The instruction is shown in the illustration 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.
1.1.1 Cautions Regarding Safety of Workers
Warning
Be sure to disconnect the power cable plug from the plug socket before
disassembling the equipment for repair.
Working onthe equipment that is connected to thepower supply may cause an
electrical shook.
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 is discharged during the repair work, do not touch the
discharged refrigerant gas.
The 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 a gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges whenthe pipe is disconnected, and it may
cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The
refrigerant gas may 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 may 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 may
cause an electrical shock or fire.

SiUS04-702 Introduction
vii
Be sure to wear a safety helmet, gloves, and a safety belt when working at a
high place (more than 2m). Insufficient safety measures may cause a fall
accident.
In case of R410A refrigerant models, be sure to use pipes, flare nuts and tools
for the exclusive use of the R410A refrigerant.
The use of materials for R22 refrigerant models may cause a serious accident
such as a damage of refrigerant cycle as well as an equipment failure.
Warning
Caution
Do not repair the electrical components with wet hands.
Working on the equipment with wet hands may cause an electrical shock.
Do not clean the air conditioner by splashing water.
Washing the unit with water may 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.
Be sure to conduct repair work with appropriate tools.
The use of inappropriate tools may cause injury.
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.
Use the welder in a well-ventilated place.
Using the welder in an enclosed room may cause oxygen deficiency.

Introduction SiUS04-702
viii
1.1.2 Cautions Regarding Safety of Users
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 may cause an electrical shock,
excessive heat generation or fire.
If the power cable and lead wires have scratches or 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.
Besure touse anexclusivepowercircuitfortheequipment,and followthelocal
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 routethe cable properly so thatthere
is no force pulling the cable at the connection terminals.
Improper connections may cause excessive heat generation or fire.
When wiring between theindoor and outdoor units, make sure that the terminal
cover does not lift off or dismount because of the cable.
Ifthecoverisnotmountedproperly,the terminal connectionsectionmaycause
an electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable may cause an electrical shock or fire.
Placingheavyitems onthe powercable,and heatingorpulling thepower cable
may damage the cable.
Do not mix air or gas other than the specified refrigerant (R410A / R22) 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 leaking point and repair it
before charging the refrigerant. After charging refrigerant, make sure that there
is no refrigerant leak.
If the leaking point 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 may generate toxic gases when it contactsflames, such as fan
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 and if the installation
work is not conducted securely, the equipment may fall and cause injury.

SiUS04-702 Introduction
ix
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 has dustor loose connection, it may cause an electrical shock or fire.
Be sure to install the product correctly by using the provided standard
installation frame.
Incorrect use of the installation frame and improper installation may cause the
equipment to fall, resulting in injury.
For unitary type
only
Be sure to install the product securely in the installation frame mounted on the
window frame.
If the unit is not securely mounted, it may fall and cause injury.
For unitary type
only
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.
Warning
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 the combustible gas leaks and remains around the unit, it may cause a fire.
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 may cause excessive heat generation,
fire or an electrical shock.
If the installation platform or frame has corroded, replace it.
Corroded installation platform or frame may cause the unit to fall, resulting in
injury.
Check the grounding, and repair it if the equipment is not properly grounded.
Improper grounding may cause an electrical shock.