Daikin RX-W Series User manual

[Applied Models]
Inverter Pair : Heat Pump
Service
Manual
SiUS092230E
Inverter Pair RX-W Series

SiUS092230E
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....................................................................... 13
1. Specifications ............................................................................................14
1.1 Wall Mounted Type .................................................................................... 14
1.2 Duct Concealed Type................................................................................. 17
1.3 Ceiling Cassette Type ................................................................................ 20
Part 3 Printed Circuit Board Connector Wiring Diagram................ 22
1. Indoor Unit.................................................................................................23
1.1 FTXR09/12/18WVJUW(S)9........................................................................ 23
1.2 FDMQ09/12/15/18/24WVJU9..................................................................... 25
1.3 FFQ09/12/15/18W2VJU9 ........................................................................... 27
2. Sensor Kit for FFQ Series .........................................................................28
2.1 BRYQ60A2W(S)......................................................................................... 28
3. Wired Remote Controller...........................................................................29
3.1 BRC1E73 ................................................................................................... 29
4. Wireless Remote Controller Receiver for FDMQ Series ...........................30
4.1 BRC082A43 ............................................................................................... 30
5. Wireless Remote Controller Kit for FFQ Series ........................................31
5.1 BRC082A41W, BRC082A42W(S).............................................................. 31
6. Outdoor Unit..............................................................................................32
6.1 RX09/12WMVJU9 ...................................................................................... 32
6.2 RX15/18/24WMVJU9 ................................................................................. 34
Part 4 Functions and Control .......................................................... 36
1. Common Functions ...................................................................................38
1.1 Temperature Control .................................................................................. 38
1.2 Frequency Principle.................................................................................... 38
2. Functions for FTXR Series........................................................................40
2.1 Airflow Direction Control............................................................................. 40
2.2 Fan Speed Control for Indoor Unit ............................................................. 41
2.3 Program Dry Operation .............................................................................. 42
2.4 Automatic Cooling/Heating Changeover .................................................... 43
2.5 Thermostat Control..................................................................................... 44

SiUS092230E
Table of Contents ii
2.6 NIGHT SET Mode ...................................................................................... 45
2.7 ECONO Operation .................................................................................... 45
2.8 2-Area INTELLIGENT EYE Operation ....................................................... 46
2.9 POWERFUL Operation .............................................................................. 48
2.10 Multi-Monitor Lamp/TIMER Lamp .............................................................. 49
2.11 Clock Setting .............................................................................................. 50
2.12 WEEKLY TIMER Operation ....................................................................... 51
2.13 Other Functions.......................................................................................... 57
3. Functions for FDMQ/FFQ Series ..............................................................58
3.1 Airflow Direction Control............................................................................. 58
3.2 Fan Speed Control for Indoor Unit ............................................................. 59
3.3 Program Dry Operation .............................................................................. 60
3.4 Clock and Calendar Setting (With BRC1E73) ............................................ 61
3.5 Schedule Timer Operation (With BRC1E73).............................................. 63
3.6 Setback Function (With BRC1E73) ............................................................ 67
3.7 Drain Pump Control.................................................................................... 68
3.8 Hot Start Control (In Heating Operation Only)............................................ 70
3.9 Presence and Floor Sensors (Option)........................................................ 71
3.10 Other Functions.......................................................................................... 74
4. Thermistor Functions ................................................................................76
5. Control Specification .................................................................................77
5.1 Mode Hierarchy .......................................................................................... 77
5.2 Frequency Control...................................................................................... 77
5.3 Controls at Mode Changing/Start-up.......................................................... 79
5.4 Discharge Pipe Temperature Control......................................................... 82
5.5 Input Current Control.................................................................................. 83
5.6 High Pressure Protection Control............................................................... 84
5.7 Freeze-up Protection Control ..................................................................... 85
5.8 Heating Peak-cut Control ........................................................................... 86
5.9 Outdoor Fan Control................................................................................... 87
5.10 Liquid Compression Protection Function.................................................... 87
5.11 Defrost Control ........................................................................................... 88
5.12 Electronic Expansion Valve Control ........................................................... 89
5.13 Malfunctions ............................................................................................... 92
Part 5 Remote Controller ................................................................ 93
1. Applicable Remote Controller ...................................................................94
2. ARC466A36 ..............................................................................................95
3. BRC082A43 ..............................................................................................97
4. BRC082A41W, BRC082A42W(S).............................................................99
5. BRC944B2 ..............................................................................................101
6. BRC1E73 ................................................................................................102

SiUS092230E
iii Table of Contents
Part 6 Service Diagnosis ............................................................... 108
1. General Problem Symptoms and Check Items .......................................110
2. Troubleshooting with LED .......................................................................111
2.1 Indoor Unit................................................................................................ 111
2.2 Outdoor Unit ............................................................................................. 113
3. Service Diagnosis ...................................................................................114
3.1 ARC466 Series......................................................................................... 114
3.2 BRC1E73 ................................................................................................. 117
3.3 BRC082A43, BRC082A41W, BRC082A42W(S)...................................... 119
4. Error Codes and Description...................................................................123
5. Troubleshooting for FTXR Series............................................................124
5.1 Indoor Unit PCB Abnormality ................................................................... 124
5.2 Freeze-up Protection Control/Heating Peak-cut Control .......................... 126
5.3 Indoor Fan Motor (DC Motor) or Related Abnormality ............................. 127
5.4 Thermistor or Related Abnormality........................................................... 130
5.5 Front Panel Open/Close Fault.................................................................. 131
5.6 Low-voltage Detection or Over-voltage Detection.................................... 132
5.7 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 134
5.8 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) ................. 136
6. Troubleshooting for FDMQ, FFQ Series .................................................137
6.1 Indoor Unit PCB Abnormality ................................................................... 137
6.2 Drain Level Control System Abnormality.................................................. 138
6.3 Indoor Fan Motor or Related Abnormality ................................................ 139
6.4 Indoor Fan PCB Abnormality.................................................................... 144
6.5 Humidifier or Related Abnormality............................................................ 145
6.6 Thermistor or Related Abnormality........................................................... 146
6.7 Presence Sensor or Floor Sensor Abnormality ........................................ 147
6.8 Remote Controller Thermistor Abnormality .............................................. 148
6.9 Low-voltage Detection or Over-voltage Detection.................................... 149
6.10 Signal Transmission Error (Between Indoor and Outdoor Unit) ............... 151
6.11 Signal Transmission Error (Between Indoor Unit and
Remote Controller) ................................................................................... 153
6.12 Signal Transmission Error (Between MAIN/SUB Remote Controllers) .... 154
6.13 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) ................. 155
7. Troubleshooting for Outdoor Unit............................................................156
7.1 Outdoor Unit PCB Abnormality................................................................. 156
7.2 Actuation of High Pressure Switch ........................................................... 157
7.3 OL Activation (Compressor Overload) or HPS Activation
(High Pressure Switch)............................................................................. 159
7.4 OL Activation (Compressor Overload) ..................................................... 162
7.5 Compressor Lock ..................................................................................... 165
7.6 DC Fan Lock ............................................................................................ 166
7.7 Input Overcurrent Detection ..................................................................... 167
7.8 Four Way Valve Abnormality.................................................................... 169
7.9 Discharge Pipe Temperature Control....................................................... 171
7.10 High Pressure Control in Cooling ............................................................. 172

SiUS092230E
Table of Contents iv
7.11 System Shutdown due to Temperature Abnormality in
the Compressor........................................................................................ 174
7.12 Compressor Sensor System Abnormality ................................................ 175
7.13 Position Sensor Abnormality .................................................................... 176
7.14 DC Voltage/Current Sensor Abnormality.................................................. 179
7.15 Thermistor or Related Abnormality (Outdoor Unit)................................... 180
7.16 Electrical Box Temperature Rise.............................................................. 182
7.17 Radiation Fin Temperature Rise .............................................................. 183
7.18 Output Overcurrent Detection .................................................................. 185
8. Check ......................................................................................................188
8.1 Thermistor Resistance Check .................................................................. 188
8.2 Indoor Fan Motor Connector Check ......................................................... 189
8.3 Power Supply Waveform Check............................................................... 190
8.4 Electronic Expansion Valve Check........................................................... 191
8.5 Four Way Valve Performance Check ....................................................... 192
8.6 Inverter Unit Refrigerant System Check ................................................... 192
8.7 Inverter Analyzer Check ........................................................................... 193
8.8 Outdoor Fan Motor Check........................................................................ 196
8.9 Installation Condition Check..................................................................... 197
8.10 Discharge Pressure Check....................................................................... 197
8.11 Outdoor Fan System Check ..................................................................... 198
8.12 Main Circuit Short Check.......................................................................... 198
8.13 Power Module Check ............................................................................... 200
Part 7 Trial Operation and Field Settings ..................................... 202
1. Pump Down Operation............................................................................203
2. Forced Cooling Operation.......................................................................204
3. Trial Operation ........................................................................................206
3.1 FTXR Series............................................................................................. 206
3.2 FDMQ, FFQ Series .................................................................................. 207
4. Field Settings for FTXR Series................................................................210
4.1 Temperature Display Switch .................................................................... 210
4.2 When 2 Units are Installed in 1 Room...................................................... 210
4.3 Jumper and Switch Settings..................................................................... 211
5. Field Settings for FDMQ, FFQ Series .....................................................212
5.1 How to Change the Field Settings............................................................ 212
5.2 Overview of Field Settings for FDMQ Series............................................ 215
5.3 Overview of Field Settings for FFQ Series ............................................... 216
5.4 MAIN/SUB Setting when Using 2 Wired Remote Controllers................... 217
5.5 MAIN/SUB and Address Setting for Wireless Remote Controller
for FDMQ Series ...................................................................................... 218
5.6 MAIN/SUB and Address Setting for Wireless Remote Controller
for FFQ Series.......................................................................................... 221
6. Field Settings for Outdoor Unit................................................................224
6.1 Facility Setting (cooling at low outdoor temperature) ............................... 224
6.2 Warmer Airflow Setting............................................................................. 225
6.3 Drain Pan Heater...................................................................................... 226

SiUS092230E
vTable of Contents
7. Silicone Grease on Power Transistor/Diode Bridge................................227
Part 8 Appendix ............................................................................. 228
1. Piping Diagrams......................................................................................229
1.1 Indoor Unit................................................................................................ 229
1.2 Outdoor Unit ............................................................................................. 230
2. Wiring Diagrams......................................................................................232
2.1 Indoor Unit................................................................................................ 232
2.2 Outdoor Unit ............................................................................................. 235
3. Operation Limit........................................................................................237

SiUS092230E
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 SiUS092230E
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.
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.

SiUS092230E 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 SiUS092230E
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.

SiUS092230E 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 SiUS092230E
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

SiUS092230E 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 SiUS092230E
8Introduction
3. Revision History
Month/Year Version Revised contents
11 / 2022 SiUS092230E First edition

SiUS092230E
Part 1 General Information 9
1. Applicable Models .....................................................................................10
2. Functions...................................................................................................11
Part 1
General Information

Applicable Models SiUS092230E
10 Part 1 General Information
1. Applicable Models
Indoor Unit
Outdoor Unit
Wall mounted type Duct concealed type Ceiling cassette type
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FTXR09WVJUS9
FTXR12WVJUW9
FTXR12WVJUS9
FTXR18WVJUW9
FTXR18WVJUS9
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FDMQ12WVJU9
FDMQ15WVJU9
FDMQ18WVJU9
FDMQ24WVJU9
FFQ09W2VJU9
FFQ12W2VJU9
FFQ15W2VJU9
FFQ18W2VJU9
RX09WMVJU9
RX12WMVJU9
RX15WMVJU9
RX18WMVJU9
RX24WMVJU9

SiUS092230E Functions
Part 1 General Information 11
2. Functions
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Functions SiUS092230E
12 Part 1 General Information
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SiUS092230E
Part 2 Specifications 13
1. Specifications ............................................................................................14
1.1 Wall Mounted Type .................................................................................... 14
1.2 Duct Concealed Type................................................................................. 17
1.3 Ceiling Cassette Type ................................................................................ 20
Part 2
Specifications

Specifications SiUS092230E
14 Part 2 Specifications
1. Specifications
1.1 Wall Mounted Type
Model
Indoor Unit FTXR09WVJUW9 FTXR09WVJUS9
Outdoor Unit RX09WMVJU9 RX09WMVJU9
Cooling +HDWLQJ Cooling +HDWLQJ
3RZHU6XSSO\ 1 I9+] 1 I9+]
&DSDFLW\5DWHG0LQ0D[ %WXK    
5XQQLQJ&XUUHQW5DWHG A 4.28 - 3.87 3.83 - 3.46 4.28 - 3.87 3.83 - 3.46
3RZHU&RQVXPSWLRQ5DWHG W 819 - 819 733 - 733 819 - 819 733 - 733
3RZHU)DFWRU5DWHG % 92.0 - 92.0 92.0 - 92.1 92.0 - 92.0 92.0 - 92.1
SEER2 / HSPF2 18.00 7.50 18.00 7.50
((55DWHG %WXKā: 11.00 — 11.00 —
&235DWHG W/W — 4.00 — 4.00
Piping Connections
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Indoor Unit FTXR09WVJUW9 FTXR09WVJUS9
)URQW3DQHO&RORU :KLWH Silver
$LUÀRZ5DWH H / M / L / SL FIP 272 / 208 / 162 / 134 346 / 258 / 201 / 117 272 / 208 / 162 / 134 346 / 258 / 201 / 117
m3/min 7.7 / 5.9 / 4.6 / 3.8 9.8 / 7.3 / 5.7 / 3.3 7.7 / 5.9 / 4.6 / 3.8 9.8 / 7.3 / 5.7 / 3.3
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Sound Pressure Level H / M / L / SL G%$ 38 / 32 / 25 / 19 41 / 34 / 28 / 19 38 / 32 / 25 / 19 41 / 34 / 28 / 19
Outdoor Unit RX09WMVJU9 RX09WMVJU9
&DVLQJ&RORU ,YRU\:KLWH ,YRU\:KLWH
+HDW([FKDQJHU )LQ6SHF7XEH :DႉH)LQ3(I+L;6/7XEH :DႉH)LQ3(I+L;6/7XEH
)DQ0RWRU Motor Output HP 0.03 0.03
Compressor Type +HUPHWLFDOO\6HDOHG6ZLQJ7\SH +HUPHWLFDOO\6HDOHG6ZLQJ7\SH
Model 1YC23AUXD 1YC23AUXD
5HIULJHUDQW2LO Type FVC50K FVC50K
&KDUJH R]/  
5HIULJHUDQW Type R-410A R-410A
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)DQ Type Propeller Propeller
5XQQLQJ&XUUHQW5DWHG A 4.21 - 3.80 3.70 - 3.34 4.21 - 3.80 3.70 - 3.34
3RZHU&RQVXPSWLRQ5DWHG W 806 - 806 707 - 707 806 - 806 707 - 707
3RZHU)DFWRU5DWHG % 92.0 - 92.2 95.2 - 95.4 92.0 - 92.2 95.2 - 95.4
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Sound Pressure Level G%$ 46 50 46 50
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FIP P3/min × 35.3