Daikin RXSQ24TAVJU User manual

Service
Manual
SiUS331708EA
RXSQ24/36/48/60TAVJU
Heat Pump 60 Hz

SiUS331708EA
iTable of Contents
RXSQ-TAVJU
VRV LIFE Heat Pump Unit
R-410A 60 Hz
ED Reference
Refer to Engineering Data for the details of specifications, option list, etc.
1. Safety Cautions......................................................................................... vii
1.1 Warnings and Cautions Regarding Safety of Workers................................vii
1.2 Warnings and Cautions Regarding Safety of Users.....................................ix
2. Icons Used ................................................................................................ xii
Part 1 General Information .............................................................. 1
1. Model Names of Indoor/Outdoor Units........................................................2
1.1 Indoor Unit.................................................................................................... 2
1.2 Air Treatment Equipment ............................................................................. 3
1.3 Outdoor Unit ................................................................................................ 3
2. External Appearance...................................................................................4
2.1 Indoor Unit.................................................................................................... 4
2.2 Air Treatment Equipment ............................................................................. 5
2.3 Outdoor Unit ................................................................................................. 5
3. Connection Ratio.........................................................................................6
Item Model ED No.
VRV indoor unit
FXFQ-T
FXFQ-P
FXZQ-TA
FXZQ-M
FXUQ-P
FXEQ-P
FXDQ-M
FXSQ-TA
FXMQ-PB
FXHQ-M
FXAQ-P
FXLQ-M, FXNQ-M
FXTQ-TA
CXTQ-TA
EDUS391400-F14
EDUS391000-F1
EDUS391776-F9
EDUS391300-F9
EDUS391437-F15
EDUS391533-F16
EDUS39-600-F2
EDUS391777-F17
EDUS391503-F4
EDUS39-600-F5
EDUS391100-F6
EDUS391502-F7
FXTQ-TA Air Handling Unit
CXTQ-TA Cased Coil Unit
Outdoor-air processing unit FXMQ-MF EDUS39-900A-F10
Energy recovery ventilator VAM-G EDUS711116A
TM

SiUS331708EA
Table of Contents ii
Part 2 Refrigerant Circuit ................................................................ 7
1. Refrigerant Circuit .......................................................................................8
1.1 Outdoor Unit ................................................................................................. 8
1.2 Indoor Unit.................................................................................................. 14
1.3 Outdoor-Air Processing Unit....................................................................... 16
2. Functional Parts Layout ............................................................................17
2.1 RXSQ24/36TAVJU..................................................................................... 17
2.2 RXSQ48TAVJU.......................................................................................... 19
2.3 RXSQ60TAVJU.......................................................................................... 21
Part 3 Remote Controller ............................................................... 23
1. Applicable Models .....................................................................................24
2. Names and Functions ...............................................................................25
2.1 BRC1E73 ................................................................................................... 25
2.2 Wireless Remote Controller ....................................................................... 28
3. Main/Sub Setting.......................................................................................29
3.1 BRC1E73 ................................................................................................... 29
3.2 When Wireless Remote Controller is Used Together................................. 30
4. Address Setting for Wireless Remote Controller.......................................31
5. Centralized Control Group No. Setting......................................................33
5.1 BRC1E73 ................................................................................................... 33
5.2 Wireless Remote Controller ....................................................................... 35
6. Service Mode ............................................................................................36
6.1 BRC1E73 ................................................................................................... 36
Part 4 Functions and Control......................................................... 39
1. Operation Mode ........................................................................................40
2. Basic Control.............................................................................................41
2.1 Normal Operation ....................................................................................... 41
2.2 Compressor PI Control............................................................................... 42
2.3 Electronic Expansion Valve PI Control....................................................... 43
2.4 Cooling Operation Fan Control................................................................... 44
3. Special Control..........................................................................................45
3.1 Startup Control ........................................................................................... 45
3.2 Oil Return Operation .................................................................................. 47
3.3 Defrost Operation ....................................................................................... 49
3.4 Pump Down Residual Operation ................................................................ 50
3.5 Restart Standby.......................................................................................... 51
3.6 Stop Control ............................................................................................... 51
4. Protection Control .....................................................................................52
4.1 High Pressure Protection Control............................................................... 52
4.2 Low Pressure Protection Control................................................................ 54
4.3 Discharge Pipe Protection Control ............................................................. 55
4.4 Inverter Protection Control ......................................................................... 56

SiUS331708EA
iii Table of Contents
5. Other Control.............................................................................................58
5.1 Demand Operation ..................................................................................... 58
5.2 Heating Operation Prohibition .................................................................... 58
5.3 Gas Furnace Operation Prohibition............................................................ 58
5.4 Gas Furnace Operation Startup Prohibition ............................................... 58
6. Outline of Control (Indoor Unit) .................................................................59
6.1 Operation Flowchart ................................................................................... 59
6.2 Set Temperature and Control Temperature ............................................... 63
6.3 Remote Controller Thermistor .................................................................... 65
6.4 Thermostat Control..................................................................................... 67
6.5 List of Swing Flap Operations .................................................................... 70
6.6 Hot Start Control (In Heating Operation Only)............................................ 71
6.7 Louver Control for Preventing Ceiling Dirt.................................................. 72
6.8 Drain Pump Control.................................................................................... 73
6.9 Electronic Expansion Valve Control ........................................................... 75
6.10 Freeze-Up Prevention ................................................................................ 76
6.11 Heater Control (Except FXTQ-TA Models)................................................. 78
6.12 Heater Control (FXTQ-TA Models)............................................................. 79
6.13 Gas Furnace Control (CXTQ-TA Models) .................................................. 82
6.14 3-Step Thermostat Processing (FXTQ-TA Models) ................................... 83
6.15 2-Step Thermostat Processing (CXTQ-TA Models) ................................... 84
6.16 Fan Control (Heater Residual) (FXTQ-TA Models) .................................... 85
6.17 Interlocked with External Equipment
(FXTQ-TA and CXTQ-TA Models) ............................................................. 85
Part 5 Field Settings and Test Operation...................................... 87
1. Field Settings from Remote Controller ......................................................88
1.1 Wired Remote Controller — BRC1E73 ...................................................... 88
1.2 Wireless Remote Controller ....................................................................... 90
1.3 List of Field Settings for Indoor Unit ........................................................... 91
1.4 Gas Furnace Set Up................................................................................. 109
1.5 List of Field Settings for Outdoor-Air Processing Unit .............................. 110
1.6 Setting of Operation Control Mode........................................................... 110
2. Field Settings from Outdoor Unit.............................................................112
2.1 Capacity Setting ....................................................................................... 112
2.2 Setting Mode and Monitor Mode .............................................................. 113
2.3 Setting Mode 1 ......................................................................................... 114
2.4 Setting Mode 2 ......................................................................................... 115
2.5 Monitor Mode ........................................................................................... 121
2.6 Setting of Low Noise Operation and Demand Operation ......................... 123
2.7 Setting of Refrigerant Recovery Mode ..................................................... 126
2.8 Setting of Vacuuming Mode ..................................................................... 126
2.9 Final Charge Adjustment.......................................................................... 126
2.10 Check Operation ...................................................................................... 127
2.11 Setting of Auxiliary Heater Control ........................................................... 128
2.12 Setting of Heat Pump Lockout and Emergency Heat Mode..................... 129

SiUS331708EA
Table of Contents iv
3. Test Operation ........................................................................................131
3.1 Check Work Prior to Turning Power Supply ON ...................................... 131
3.2 Turn Power ON ........................................................................................ 131
3.3 Test Operation.......................................................................................... 132
3.4 Gas Furnace Test Operation.................................................................... 135
3.5 Error Codes and Corresponding Measures.............................................. 136
3.6 When Turning ON Power First Time ........................................................ 138
3.7 When Turning ON Power the Second Time and Subsequent.................. 138
3.8 When an Indoor Unit or Outdoor Unit has been Added,
or Indoor or Outdoor Unit PCB has been Changed.................................. 138
Part 6 Service Diagnosis.............................................................. 139
1. Servicing Items to be Confirmed .............................................................142
1.1 Troubleshooting........................................................................................ 142
1.2 Precautions for Maintenance.................................................................... 142
1.3 Refrigerant Properties (R-410A)............................................................... 143
2. Symptom-Based Troubleshooting...........................................................144
2.1 Indoor Unit Overall ................................................................................... 144
2.2 With Optional Infrared Presence/Floor Sensor......................................... 147
2.3 With Gas Furnace .................................................................................... 148
2.4 Gas Furnace Lockout Reset..................................................................... 148
3. Service Check Function ..........................................................................149
3.1 Wired Remote Controller.......................................................................... 149
3.2 Wireless Remote Controller ..................................................................... 150
4. Troubleshooting by Error Code ...............................................................152
4.1 Error Codes and Descriptions .................................................................. 152
4.2 Error Codes - Sub Codes ......................................................................... 154
4.3 Error Code Indication by Outdoor Unit PCB............................................. 156
4.4 External Protection Device Abnormality ................................................... 160
4.5 Indoor Unit PCB Abnormality ................................................................... 162
4.6 Drain Level Control System (S1L) Abnormality........................................ 163
4.7 Indoor Fan Motor (M1F) Lock, Overload .................................................. 165
4.8 Indoor Fan Motor Abnormality.................................................................. 168
4.9 Blower Motor Not Running ....................................................................... 172
4.10 Indoor Fan Motor Status Abnormality....................................................... 173
4.11 Low Indoor Airflow.................................................................................... 174
4.12 Swing Flap Motor Abnormality ................................................................. 175
4.13 Power Supply Voltage Abnormality .......................................................... 177
4.14 Blower Motor Stops for Over/Under Voltage ............................................ 178
4.15 Electronic Expansion Valve Coil Abnormality, Dust Clogging .................. 179
4.16 Gas Furnace Abnormality......................................................................... 180
4.17 Drain Level Above Limit ........................................................................... 181
4.18 Capacity Determination Device Abnormality ............................................ 182
4.19 Transmission Abnormality (between Indoor Unit PCB and Fan PCB) ..... 183
4.20 Blower Motor Communication Error ......................................................... 185
4.21 Climate Talk Communication Error .......................................................... 186
4.22 Thermistor Abnormality ............................................................................ 187

SiUS331708EA
vTable of Contents
4.23 Combination Abnormality (between Indoor Unit PCB and Fan PCB)....... 188
4.24 Blower Motor HP Mismatch...................................................................... 189
4.25 Indoor Blower Does Not Have Required Parameters to Function............ 190
4.26 Remote Sensor Abnormality .................................................................... 191
4.27 Humidity Sensor System Abnormality ...................................................... 192
4.28 Infrared Presence/Floor Sensor Error ...................................................... 193
4.29 Remote Controller Thermistor Abnormality .............................................. 198
4.30 Outdoor Main PCB Abnormality ............................................................... 199
4.31 Activation of High Pressure Switch .......................................................... 200
4.32 Activation of Low Pressure Sensor .......................................................... 202
4.33 Inverter Compressor Motor Lock.............................................................. 204
4.34 Outdoor Fan Motor Abnormality ............................................................... 206
4.35 Electronic Expansion Valve Coil Abnormality........................................... 208
4.36 Discharge Pipe Temperature Abnormality ............................................... 209
4.37 Thermistor Abnormality ............................................................................ 210
4.38 High Pressure Sensor Abnormality .......................................................... 211
4.39 Low Pressure Sensor Abnormality ........................................................... 212
4.40 PCB (for Inverter Compressor) Abnormality............................................. 213
4.41 Radiation Fin Temperature Rise Abnormality .......................................... 214
4.42 Inverter Compressor Instantaneous Overcurrent ..................................... 215
4.43 Inverter Compressor Overcurrent............................................................. 216
4.44 Inverter Compressor Startup Abnormality ................................................ 217
4.45 Transmission Error
(Between Microcomputers on the Outdoor Main PCB) ............................ 218
4.46 Inverter Circuit Capacitor High Voltage .................................................... 219
4.47 Radiation Fin Thermistor Abnormality ...................................................... 220
4.48 Refrigerant Shortage ................................................................................ 221
4.49 Power Supply Insufficient or Instantaneous Abnormality ......................... 223
4.50 Check Operation Not Executed................................................................ 225
4.51 Transmission Error between Indoor Units and Outdoor Unit.................... 226
4.52 Transmission Error between Remote Controller and Indoor Unit............. 228
4.53 Transmission Error between Main and Sub Remote Controllers ............. 229
4.54 Transmission Error between Indoor and
Outdoor Units in the Same System .......................................................... 230
4.55 Improper Combination of Indoor and Outdoor Units,
Indoor Units and Remote Controller......................................................... 231
4.56 Incorrect Gas Furnace Connecting Number............................................. 233
4.57 Incorrect Electric Heater Capacity Setting................................................ 234
4.58 Address Duplication of Centralized Controller.......................................... 235
4.59 Transmission Error between Centralized Controller and Indoor Unit ....... 236
4.60 System Not Set ........................................................................................ 239
4.61 System Abnormality, Refrigerant System Address Undefined ................. 240
4.62 Climate Talk Communication System Combination Error
(Before Initial Setting for Communication Completes) ............................. 242
4.63 Climate Talk Communication System Combination Error
(After Initial Setting for Communication Completes) ................................ 243
4.64 Defective PCB .......................................................................................... 244
4.65 Transmission Error (between Centralized Controllers) ............................ 245

SiUS331708EA
Table of Contents vi
4.66 Poor Centralized Controller Combination................................................. 247
4.67 Address Duplication, Poor Setting............................................................ 249
4.68 Operation Lamp Blinking .......................................................................... 251
4.69 Central Control Indicator Lamp Blinking (One blink) ................................ 253
4.70 Central Control Indicator Lamp Blinking (Two blinks) .............................. 256
5. Check ......................................................................................................257
5.1 High Pressure Check ............................................................................... 257
5.2 Low Pressure Check ................................................................................ 258
5.3 Superheat Operation Check..................................................................... 259
5.4 Power Transistor Check ........................................................................... 260
5.5 Refrigerant Overcharge Check................................................................. 261
5.6 Refrigerant Shortage Check..................................................................... 262
5.7 Vacuuming and Dehydration Procedure .................................................. 263
5.8 List of Inverter-Related Error Codes......................................................... 264
5.9 Concept of Inverter-Related Error Codes................................................. 265
5.10 Thermistor Check ..................................................................................... 266
5.11 Pressure Sensor Check ........................................................................... 269
5.12 Master Unit Centralized Connector Setting Table .................................... 270
5.13 Master/Slave Unit Setting Table............................................................... 271
5.14 Broken Wire Check of the Relay Wires .................................................... 272
5.15 Fan Motor Connector Check .................................................................... 273
5.16 Electronic Expansion Valve Coil Check ................................................... 273
Part 7 Appendix............................................................................ 275
1. Wiring Diagrams......................................................................................276
1.1 Outdoor Unit ............................................................................................. 276
1.2 Indoor Unit................................................................................................ 279
1.3 Air Treatment Equipment ......................................................................... 294

Safety Cautions SiUS331708EA
vii
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 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.
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 the 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
inspecting 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.

SiUS331708EA Safety Cautions
viii
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 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 and R-410A refrigerant models, be sure to use pipes, flare
nuts and tools intended for exclusive use with R-32 and R-410A
refrigerant.
The use of materials for R-22 refrigerant models may cause a serious accident,
such as damage to the 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 refrigerating system, excessively high pressure results, causing
equipment damage and injury.
Warning
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.

Safety Cautions SiUS331708EA
ix
1.2 Warnings and Cautions Regarding Safety of Users
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.
Conduct welding work in a well-ventilated place.
Using a 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.

SiUS331708EA Safety Cautions
x
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.
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 refrigerating system, excessively high pressure results, causing
equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leakage and repair it
before charging the refrigerant. After charging the refrigerant, make sure
that there is no leakage.
If the leakage 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 if 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.
Warning

Safety Cautions SiUS331708EA
xi
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 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.
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.
Be sure to measure insulation resistance after the repair, and make sure
that the resistance is 1 MΩor 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.

SiUS331708EA Icons Used
xii
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 A warning is used when there is danger of personal injury.
Caution
Caution A 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 A note provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
Reference A 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.

SiUS331708EA
1General Information
Part 1
General Information
1. Model Names of Indoor/Outdoor Units........................................................2
1.1 Indoor Unit.................................................................................................... 2
1.2 Air Treatment Equipment ............................................................................. 3
1.3 Outdoor Unit ................................................................................................ 3
2. External Appearance...................................................................................4
2.1 Indoor Unit.................................................................................................... 4
2.2 Air Treatment Equipment ............................................................................. 5
2.3 Outdoor Unit ................................................................................................. 5
3. Connection Ratio.........................................................................................6

SiUS331708EA Model Names of Indoor/Outdoor Units
General Information 2
1. Model Names of Indoor/Outdoor Units
1.1 Indoor Unit
Capacity Range (ton) 0.5 0.6 0.8 11.25 1.5 22.5 33.5 44.5 5
Power Supply,
Standard
Capacity Index 5.8 7.5 9.5 12 15 18 20 24 30 36 42 48 54 60
Ceiling Mounted Cassette
(Round Flow with Sensing) Type
FXFQ
— 07T 09T 12T 15T 18T — 24T 30T 36T — 48T — —
VJU
Ceiling Mounted Cassette
(Round Flow) Type — — 09P 12P — 18P — 24P 30P 36P — 48P — —
VISTA™ 2 × 2 Cassette Type
FXZQ
05TA 07TA 09TA 12TA 15TA 18TA — — — — — — — —
4 Way Ceiling Mounted
Cassette (2'×2') Type — 07M 09M 12M 15M 18M — — — — — — — — VJU9
4-Way Blow
Ceiling-Suspended Type FXUQ — — — — — — 18P 24P 30P 36P — — — —
VJU
One Way Blow Cassette Type FXEQ — 07P 09P 12P 15P 18P — 24P — — — — — —
Slim Ceiling Mounted Duct
Type FXDQ — 07M 09M 12M — 18M — 24M — — — — — —
MSP Concealed Ducted Type FXSQ 05TA 07TA 09TA 12TA 15TA 18TA — 24TA 30TA 36TA — 48TA 54TA —
Ceiling Mounted Duct Type
(Middle and High Static Pressure)
FXMQ — 07PB 09PB 12PB 15PB 18PB — 24PB 30PB 36PB — 48PB 54PB —
Ceiling Suspended Type FXHQ — — — 12M — — — 24M — 36M — — — —
Wall Mounted Type FXAQ — 07P 09P 12P — 18P — 24P — — — — — —
Floor Standing Type FXLQ — 07M 09M 12M — 18M — 24M — — — — — —
Concealed Floor Standing Type FXNQ — 07M 09M 12M — 18M — 24M — — — — — —
Air Handling Unit FXTQ
— — 09TA 12TA — 18TA — 24TA 30TA 36TA 42TA 48TA 54TA 60TA VJUA
— — 09TA 12TA — 18TA — 24TA 30TA 36TA 42TA 48TA 54TA 60TA VJUD
Cased Coil Unit CXTQ — — — — — — — 24TA — 36TA — 48TA — 60TA SBLU
VJ : 1 phase, 208/230 V, 60 Hz
SBL : 1 phase, 115 V, 60 Hz
U(VJU) : Standard symbol

Model Names of Indoor/Outdoor Units SiUS331708EA
3General Information
1.2 Air Treatment Equipment
Outdoor-Air Processing Unit
Energy Recovery Ventilator (VAM series)
1.3 Outdoor Unit
Series Model Name Power Supply,
Standard
FXMQ 48MF 72MF VJU
Series Model Name Power Supply,
Standard
VAM 300G 470G 600G 1200G VJU
VJ : 1 phase, 208/230 V, 60 Hz
U(VJU) : Standard symbol
Capacity Range 2 ton 3 ton 4 ton 5 ton Power Supply,
Standard
Capacity Index 24 36 48 57
Heat Pump RXSQ 24TA 36TA 48TA 60TA VJU
VJ : 1 phase, 208/230 V, 60 Hz
U(VJU) : Standard symbol

SiUS331708EA External Appearance
General Information 4
2. External Appearance
2.1 Indoor Unit
Ceiling mounted cassette (Round flow with sensing) type
FXFQ-T
Shown with BYCQ125B-W1
Ceiling mounted duct type (Middle and high static pressure)
FXMQ-PB
Ceiling mounted cassette (Round flow) type
FXFQ-P
Shown with BYCP125K-W1
Ceiling suspended type
FXHQ-M
VISTA™ 2 × 2 cassette type
FXZQ-TA
Shown with BYFQ60C3W1W
Wall mounted type
FXAQ-P
4 way ceiling mounted cassette (2’×2’) type
FXZQ-M
Shown with BYFQ60B8W1U
Floor standing type
FXLQ-M
4-way blow ceiling-suspended type
FXUQ-P
Concealed floor standing type
FXNQ-M
One way blow cassette type
FXEQ-P
Air handling unit
FXTQ-TA
Slim ceiling mounted duct type
FXDQ-M
Cased coil unit
CXTQ-TA
MSP concealed ducted type
FXSQ-TA

External Appearance SiUS331708EA
5General Information
2.2 Air Treatment Equipment
2.3 Outdoor Unit
Outdoor-air processing unit
FXMQ-MF
Energy recovery ventilator
(VAM series)
VAM-G
RXSQ60TAVJU
RXSQ24/36/48TAVJU
2/3/4 ton 5 ton

SiUS331708EA Connection Ratio
General Information 6
3. Connection Ratio
Outdoor Unit
Connection ratio = Total capacity index of the indoor units
Capacity index of the outdoor units
Type Min. connection ratio
Max. connection ratio
Types of connected indoor units
VRV indoor units
Single outdoor units 50% 130%
Model Name RXSQ24TAVJU RXSQ36TAVJU RXSQ48TAVJU RXSQ60TAVJU
Capacity Range 2 ton 3 ton 4 ton 5 ton
Capacity Index 24 36 48 57
Max. Number of
Connectable
Indoor Units
4689
Total Capacity
Index of Indoor
Units to be
Connected
12.0
~
31.2
18.0
~
46.8
24.0
~
62.4
28.5
~
74.1

SiUS331708EA
7Refrigerant Circuit
Part 2
Refrigerant Circuit
1. Refrigerant Circuit .......................................................................................8
1.1 Outdoor Unit ................................................................................................. 8
1.2 Indoor Unit.................................................................................................. 14
1.3 Outdoor-Air Processing Unit....................................................................... 16
2. Functional Parts Layout ............................................................................17
2.1 RXSQ24/36TAVJU..................................................................................... 17
2.2 RXSQ48TAVJU.......................................................................................... 19
2.3 RXSQ60TAVJU.......................................................................................... 21