Daikin CTXU25G2V1B User manual

Warning
Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the
world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a
particular country. Prior to purchase, please therefore confirm with your local authorised importer,
distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for
use, in the region where the product will be used. This statement does not purport to exclude, restrict
or modify the application of any local legislation.
Ask a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
Read the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Cautions on product corrosion
JMI-0107 JQA-1452
Organization:
DAIKIN INDUSTRIES, LTD.
AIR CONDITIONING MANUFACTURING DIVISION
Scope of Registration:
THE DESIGN/DEVELOPMENT AND MANUFACTURE OF
COMMERCIAL AIR CONDITIONING, HEATING, COOLING,
REFRIGERATING EQUIPMENT, COMMERCIAL HEATING
EQUIPMENT, RESIDENTIAL AIR CONDITIONING
EQUIPMENT, HEAT RECLAIM VENTILATION, AIR
CLEANING EQUIPMENT, MARINE TYPE CONTAINER
REFRIGERATION UNITS, COMPRESSORS AND VALVES.
Organization:
DAIKIN INDUSTRIES
(THAILAND) LTD.
Scope of Registration:
THE DESIGN/DEVELOPMENT
AND MANUFACTURE OF AIR
CONDITIONERS AND THE
COMPONENTS INCLUDING
COMPRESSORS USED FOR THEM
All of the Daikin Group’s business
facilities and subsidiaries in Japan
are certified under the ISO 14001
international standard for
environment management.
Dealer Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/
All rights reserved
c
SiBE12-908
Specifications, designs and other content appearing in this brochure are current as of June 2009 but subject to change without notice.
SiBE12-908
Printed in Japan 06/2009 B AK
SiBE12-908
[Applied Models]
 Inverter Multi : Heat Pump
Service Manual / Inverter Multi System with Humidifying G-Series
Inverter Multi System
with Humidifying
G-Series

SiBE12-908
iTable of Contents
Inverter Multi System
with Humidifying
G-Series
zHeat Pump
Indoor Unit
CTXU25G2V1B
CTXU35G2V1B
CTXU42G2V1B
CTXU50G2V1B
Outdoor Unit
2MXU40GV1B
2MXU50GV1B

SiBE12-908
Table of Contents ii
1. Introduction ............................................................................................vi
1.1 Safety Cautions.......................................................................................vi
1.2 Used Icons ...............................................................................................x
Part 1 List of Functions ................................................................ 1
1. Functions.................................................................................................2
Part 2 Specifications .................................................................... 4
1. Specifications..........................................................................................5
1.1 Indoor Units..............................................................................................5
1.2 Outdoor Units ...........................................................................................6
Part 3 Printed Circuit Board Connector Wiring Diagram ............. 8
1. Printed Circuit Board Connector Wiring Diagram....................................9
1.1 Indoor Units..............................................................................................9
1.2 Outdoor Units .........................................................................................11
Part 4 Function and Control........................................................ 13
1. Main Functions......................................................................................14
1.1 Frequency Principle................................................................................14
1.2 Thermostat Control.................................................................................16
1.3 Automatic Operation...............................................................................17
1.4 Program Dry Function............................................................................18
1.5 Airflow Direction Control.........................................................................19
1.6 Fan Speed Control for Indoor Units........................................................20
1.7 HUMID HEAT Operation........................................................................21
1.8 Fresh Air Supply Ventilation...................................................................26
1.9 2-AREA INTELLIGENT EYE..................................................................28
1.10 Inverter POWERFUL Operation.............................................................30
1.11 ECONO Mode........................................................................................31
1.12 NIGHT SET Mode ..................................................................................32
1.13 Other Functions......................................................................................33
1.14 Table for Special Modes.........................................................................35
2. Function of Thermistor..........................................................................37
2.1 Heat Pump Model...................................................................................37
3. Control Specification.............................................................................39
3.1 Mode Hierarchy......................................................................................39
3.2 Automatic switching for HUMID HEAT operation room..........................40
3.3 Frequency Control..................................................................................41
3.4 Controls at Mode Changing / Start-up....................................................43
3.5 Discharge Pipe Temperature Control.....................................................44
3.6 Input Current Control..............................................................................45
3.7 Freeze-up Protection Control.................................................................45
3.8 Heating Peak-cut Control .......................................................................46
3.9 Fan Control.............................................................................................46
3.10 Liquid Compression Protection Function 2.............................................47
3.11 Defrost Control.......................................................................................47
3.12 Electronic Expansion Valve Control.......................................................48
3.13 Malfunctions ...........................................................................................52

SiBE12-908
iii Table of Contents
3.14 Forced Operation Mode .........................................................................53
3.15 Additional Function.................................................................................53
Part 5 Installation / Operation Manual ....................................... 54
1. Installation Manual................................................................................55
1.1 Indoor Units............................................................................................55
1.2 Outdoor Units .........................................................................................67
2. System Configuration............................................................................79
3. Operation Manual..................................................................................80
3.1 Names of Parts.......................................................................................80
3.2 AUTO · DRY · COOL · HEAT · FAN Operation......................................82
3.3 Adjusting the Airflow Direction................................................................84
3.4 HUMID HEAT Operation........................................................................86
3.5 FRESH AIR SUPPLY VENTILATION ....................................................88
3.6 COMFORT AIRFLOW and INTELLIGENT EYE Operation....................89
3.7 POWERFUL and OUTDOOR UNIT QUIET Operation ..........................91
3.8 ECONO Operation .................................................................................92
3.9 TIMER Operation ...................................................................................93
3.10 WEEKLY TIMER Operation ...................................................................95
3.11 Note for Multi System...........................................................................100
Part 6 Service Diagnosis........................................................... 101
1. Service Check Function......................................................................103
1.1 Failure Diagnosis with Multi-Colored Indicator Lamp...........................103
1.2 Failure Diagnosis by LED Indication ....................................................103
1.3 Failure Diagnosis by Remote Controller...............................................104
2. Troubleshooting ..................................................................................107
2.1 Error Code Indication by Remote Controller ........................................107
2.2 Air conditioner does not run. ................................................................109
2.3 Air conditioner runs but does not cool (heat)........................................112
2.4 When operation starts, safety breaker works.......................................114
2.5 Air conditioner makes big noise and vibration......................................116
2.6 Air is not humidified enough.................................................................117
2.7 Indoor Unit PCB Abnormality ...............................................................120
2.8 Freeze-up Protection Control or Heating Peak-cut Control..................121
2.9 Fan Motor (DC Motor) or Related Abnormality.....................................123
2.10 Thermistor or Related Abnormality (Indoor Unit)..................................125
2.11 Humidity Sensor Abnormality...............................................................126
2.12 Signal Transmission Error (Indoor Unit - Outdoor Unit) .......................127
2.13 Incompatible Power Supply between Indoor Unit and Outdoor Unit....129
2.14 Incomplete Setting for Hose Length.....................................................130
2.15 Freeze-up Protection in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units)....................................................131
2.16 Outdoor Unit PCB Abnormality.............................................................132
2.17 OL Activation (Compressor Overload) .................................................133
2.18 Compressor Lock.................................................................................134
2.19 DC Fan Lock ........................................................................................135
2.20 Input Overcurrent Detection.................................................................136
2.21 Discharge Pipe Temperature Control...................................................138
2.22 High Pressure Control in Cooling.........................................................139
2.23 Compressor Sensor System Abnormality ............................................141

SiBE12-908
Table of Contents iv
2.24 Damper Abnormality.............................................................................142
2.25 Position Sensor Abnormality................................................................143
2.26 DC Voltage / DC Current Sensor Abnormality .....................................145
2.27 Thermistor or Related Abnormality (Outdoor Unit)...............................146
2.28 Abnormal Temperature in Electrical Box..............................................148
2.29 Temperature Rise in Radiation Fin.......................................................150
2.30 Output Overcurrent...............................................................................152
2.31 Refrigerant Shortage............................................................................154
2.32 Over Voltage Protection / Low Voltage Protection ...............................156
2.33 Outdoor Unit PCB Abnormality or
Communication Circuit Abnormality .....................................................157
2.34 Signal Transmission Error on Outdoor Unit PCB.................................160
2.35 Fan Motor System Abnormality / Fan Lock ..........................................162
2.36 Heater Wire Abnormality ......................................................................163
2.37 Humidifying Fan Outlet Thermistor Abnormality / Heater
Temperature Abnormality.....................................................................165
2.38 Lights-out of Microcomputer Status Lamp............................................167
3. Check..................................................................................................168
3.1 Fan Motor Connector Output Check ....................................................168
3.2 Thermistor Resistance Check ..............................................................169
3.3 Installation Condition Check.................................................................170
3.4 Outdoor Fan System Check (DC Motor) ..............................................170
3.5 Power Supply Waveform Check...........................................................171
3.6 Main Circuit Electrolytic Capacitor Check ............................................171
3.7 Refrigerant System Check ...................................................................172
3.8 “Inverter Checker” Check .....................................................................173
3.9 Power Transistor Check.......................................................................174
3.10 Discharge Pressure Check...................................................................175
3.11 Electronic Expansion Valve Check.......................................................176
3.12 Rotating Pulse Input on Outdoor Unit PCB Check...............................177
3.13 Main Circuit Short Check......................................................................179
3.14 Four Way Valve Performance Check...................................................180
Part 7 Removal Procedure ........................................................ 181
1. Indoor Unit...........................................................................................182
1.1 Removal of Air filter..............................................................................182
1.2 Removal of Front Panel........................................................................185
1.3 Removal of Front Grille ........................................................................187
1.4 Removal of Horizontal Blades and Vertical Blades..............................190
1.5 Removal of Electrical Box ....................................................................194
1.6 Removal of PCB...................................................................................197
1.7 Removal of the Connecting Duct..........................................................202
1.8 Removal of Heat Exchanger ................................................................203
1.9 Removal of Swing Motor......................................................................206
1.10 Removal of Fan Rotor..........................................................................210
2. Outdoor Unit........................................................................................213
2.1 Removal of Humidifier Unit...................................................................213
2.2 Removal of Heater ASSY / Humidifying Rotor
(Moisture Adsorption Element) / Humidifying Rotor Motor...................216
2.3 Removal of Damper Motor ...................................................................220
2.4 Removal of Limit Switch / Humidifying Thermistor...............................222

SiBE12-908
vTable of Contents
2.5 Removal of the Fan-valve-duct ASSY..................................................225
2.6 Removal of Hygroscopic Fan Rotor / Hygroscopic Fan Motor.............227
2.7 Removal of Panels and Plates .............................................................228
2.8 Removal of Electrical Box ....................................................................231
2.9 Removal of PCB...................................................................................236
2.10 Removal of Sound Blanket...................................................................242
2.11 Removal of the Propeller Fan / Fan Motor...........................................245
2.12 Removal of Thermistors .......................................................................248
2.13 Removal of Compressor.......................................................................250
2.14 Removal of the Four Way Valve / Electronic Expansion Valve............252
Part 8 Others ............................................................................. 254
1. Others .................................................................................................255
1.1 Trial Operation......................................................................................255
1.2 Jumper Settings ...................................................................................256
1.3 Application of Silicon Grease to a Power Transistor and
a Diode Bridge......................................................................................257
Part 9 Appendix......................................................................... 258
1. Piping Diagrams..................................................................................259
1.1 Indoor Units..........................................................................................259
1.2 Outdoor Units .......................................................................................260
2. Wiring Diagrams..................................................................................261
2.1 Indoor Units..........................................................................................261
2.2 Outdoor Units .......................................................................................262

SiBE12-908 Introduction
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 on the equipment that is connected to the power supply maycause 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 when the 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.

Introduction SiBE12-908
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.

SiBE12-908 Introduction
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.
Besureto useanexclusivepowercircuitfortheequipment,andfollowthelocal
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 sothat there
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.
Ifthe coveris notmounted properly,theterminal connection sectionmaycause
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.
Placingheavyitemson thepowercable, andheatingor pullingthepowercable
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
beforecharging the refrigerant.After charging refrigerant, makesure 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 maygenerate toxic gases when it contacts flames, 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.

Introduction SiBE12-908
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 dust or 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.

SiBE12-908 Introduction
x
1.2 Used Icons
Icons are used to attract the attention of the reader to specific information. The meaning of each
icon is described in the table below:
Be sure to measure the 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 the 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.
Be sure to install the packing and seal on the installation frame properly.
If the packing andseal are not installed properly, water may enterthe room and
wet the furniture and floor.
For unitary type
only
Caution
Icon Type of
Information Description
Note:
Note A “note” provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
Caution
Caution A “caution” is used when thereis danger that the reader, through
incorrectmanipulation, maydamage equipment, loose data, get
an unexpected result or has to restart (part of) a procedure.
Warning
Warning A “warning” is used when there is danger of personal injury.
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.

SiBE12-908
1List of Functions
Part 1
List of Functions
1. Functions.................................................................................................2

SiBE12-908 Functions
List of Functions 2
1. Functions
Category Functions
CTXU25-50G2V1B
Category Functions
CTXU25-50G2V1B
Basic
Function Inverter (with Inverter Power Control) {Health & Clean Air-Purifying Filter —
Operation Limit for Cooling (°CDB) —
Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter —
PAM Control — Air-Purifying Filter with Photocatalytic
Deodorizing Function —
Standby Electricity Saving — Titanium Apatite Photocatalytic
Air-Purifying Filter {
Compressor Oval Scroll Compressor —
Swing Compressor — Air Filter (Prefilter) {
Rotary Compressor — Wipe-clean Flat Panel {
Reluctance DC Motor — Washable Grille —
Comfortable
Airflow Power-Airflow Flap — Mold Proof Operation —
Power-Airflow Dual Flaps {Heating Dry Operation —
Wide-Angle Louvers {Good-Sleep Cooling Operation —
Vertical Auto-Swing (Up and Down) {Fresh Air Supply Ventilation {
Horizontal Auto-Swing (Right and Left) {Timer Weekly Timer {
3-D Airflow {24-Hour ON/OFF Timer {
Comfort Airflow Mode {Night Set Mode {
Comfort
Control Auto Fan Speed {Worry Free “Reliability &
Durability”
Auto-Restart (after Power Failure) {
Indoor Unit Quiet Operation {Self-Diagnosis (Digital, LED) Display {
Night Quiet Mode (Automatic) — Wiring Error Check —
Outdoor Unit Quiet Operation (Manual) — Anticorrosion Treatment of Outdoor
Heat Exchanger —
INTELLIGENT EYE —
2-Area INTELLIGENT EYE {Flexibility Multi-Split / Split Type Compatible
Indoor Unit —
Quick Warming Function —
Hot-Start Function {H/P, C/O Compatible Indoor Unit —
Automatic Defrosting — Flexible Voltage Correspondence —
Operation Automatic Operation {High Ceiling Application —
Humidifying Operation {Chargeless —
Program Dry Function {Either Side Drain (Right or Left) {
Fan Only {Power Selection —
Lifestyle
Convenience New POWERFUL Operation (Non-Inverter) —Remote
Control 5-Rooms Centralized Controller (Option) {
Inverter POWERFUL Operation {Remote Control Adaptor
(Normal Open-Pulse Contact) (Option) {
Priority-Room Setting —
Cooling / Heating Mode Lock — Remote Control Adaptor
(Normal Open Contact) (Option) {
HOME LEAVE Operation —
ECONO Mode {DIII-NET Compatible (Adaptor)
(Option) {
Indoor Unit ON/OFF Switch {Remote
Controller Wireless {
Multi-colored Indicator {Wired —
R/C with Back Light {
Temperature Display —
Note: {: Holding Functions
—: No Functions

Functions SiBE12-908
3List of Functions
Category Functions
2MXU40/50GV1B
Category Functions
2MXU40/50GV1B
Basic
Function Inverter (with Inverter Power Control) {Health & Clean Air-Purifying Filter —
Operation Limit for Cooling (°CDB) 10 ~
46 Photocatalytic Deodorizing Filter —
Operation Limit for Heating (°CWB) –15 ~
15.5 Air-Purifying Filter with Photocatalytic
Deodorizing Function —
PAM Control {Titanium Apatite Photocatalytic
Air-Purifying Filter —
Standby Electricity Saving — Air Filter (Prefilter) —
Compressor Oval Scroll Compressor — Wipe-clean Flat Panel —
Swing Compressor {Washable Grille —
Rotary Compressor — Mold Proof Operation —
Reluctance DC Motor {Heating Dry Operation —
Comfortable
Airflow Power-Airflow Flap — Good-Sleep Cooling Operation —
Power-Airflow Dual Flaps — Fresh Air Supply Ventilation {
Wide-Angle Louvers — Timer Weekly Timer —
Vertical Auto-Swing (Up and Down) — 24-Hour ON/OFF Timer —
Horizontal Auto-Swing (Right and Left) — Night Set Mode —
3-D Airflow — Worry Free
“Reliability &
Durability”
Auto-Restart (after Power Failure) —
Comfort Airflow Mode — Self-Diagnosis (Digital, LED) Display {
Comfort
Control Auto Fan Speed — Wiring-Error Check —
Indoor Unit Quiet Operation — Anticorrosion Treatment of Outdoor
Heat Exchanger {
Night Quiet Mode (Automatic) — Flexibility Multi-Split / Split Type Compatible
Indoor Unit —
Outdoor Unit Quiet Operation (Manual) {H/P, C/O Compatible Indoor Unit —
INTELLIGENT EYE — Flexible Voltage Correspondence —
2-Area INTELLIGENT EYE — High Ceiling Application —
Quick Warming Function {Chargeless 20m
Hot-Start Function — Either Side Drain (Right or Left) —
Automatic Defrosting {Power-Selection —
Operation Automatic Operation — Remote
Control 5-Rooms Centralized Controller (Option) —
Humidifying Operation — Remote Control Adaptor
(Normal Open-Pulse Contact) (Option) —
Program Dry Function — Remote Control Adaptor
(Normal Open Contact) (Option) —
Fan Only — DIII-NET Compatible (Adaptor) (Option) —
Lifestyle
Convenience New POWERFUL Operation (Non-Inverter) —Remote
Controller Wireless —
Inverter POWERFUL Operation — Wired —
Priority-Room Setting {
Cooling / Heating Mode Lock —
HOME LEAVE Operation —
ECONO Mode —
Indoor Unit ON/OFF Switch —
Multi-colored Indicator —
R/C with Back Light —
Temperature Display —
Note: {: Holding Functions
—: No Functions

SiBE12-908
Specifications 4
Part 2
Specifications
1. Specifications..........................................................................................5
1.1 Indoor Units..............................................................................................5
1.2 Outdoor Units ...........................................................................................6

Specifications SiBE12-908
5Specifications
1. Specifications
1.1 Indoor Units 50Hz 220-230-240V
Note: 1. ★: In humidifying operation, the operation sound increases by about 2dB in the indoor unit.
2. The humidifying capacity is 450ml/h under the following condition.
Outdoor air temperature: 7°CDB / 6°CWB
Humidifying hose length: 4.0m
Airflow rate of indoor unit: H tap
Model CTXU25G2V1B CTXU35G2V1B
Cooling Heating Cooling Heating
Rated Capacity 2.5kW Class 3.5kW Class
Front Panel Color White White
Airflow Rate m³/min
(cfm)
H 9.1 (321) 9.8 (346) 10.4 (367) 10.6 (374)
M 7.1 (252) 7.9 (280) 7.7 (270) 8.5 (302)
L 5.2 (182) 6.2 (217) 4.8 (170) 6.4 (226)
SL 3.7 (130) 5.2 (183) 3.5 (125) 5.4 (191)
Fan Type Cross Flow Fan Cross Flow Fan Motor Output W 23 23
Speed Steps 5 Steps, Quiet, Auto 5 Steps, Quiet, Auto
Air Direction Control Right, Left, Horizontal, Downward Right, Left, Horizontal, Downward
Air Filter Removable / Washable / Mildew Proof Removable / Washable / Mildew Proof
Running Current (Rated) A 0.09-0.08-0.08 0.10-0.10-0.09 0.12-0.12-0.11 0.13-0.13-0.12
Power Consumption (Rated) W 18 21 26 28
Power Factor % 90.9-97.8-93.8 95.5-91.3-97.2 98.5-94.2-98.5 97.9-93.6-97.2
Temperature Control Microcomputer Control Microcomputer Control
Dimensions (H×W×D) mm 295×800×215 295×800×215
Packaged Dimensions (H×W×D) mm 274×870×366 274×870×366
Weight kg 9 10
Gross Weight kg 13 14
Operation
Sound ★H/M/L/SL dBA 38/32/25/22 39/34/28/25 42/34/26/23 42/36/29/26
Sound Power H dBA 54 55 58 58
Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes
Piping Connection Liquid mm φ 6.4 φ 6.4
Gas mm φ 9.5 φ 9.5
Drain mm φ18.0 φ18.0
Drawing No. 3D063377 3D063378
Model CTXU42G2V1B CTXU50G2V1B
Cooling Heating Cooling Heating
Rated Capacity 4.2kW Class 5.0kW Class
Front Panel Color White White
Airflow Rate m³/min
(cfm)
H 9.1 (321) 11.2 (395) 10.2 (360) 11.0 (388)
M 7.7 (273) 9.4 (333) 8.6 (305) 9.3 (330)
L 6.3 (221) 7.7 (271) 7.0 (246) 7.6 (267)
SL 5.4 (190) 6.8 (240) 6.0 (212) 6.7 (236)
Fan Type Cross Flow Fan Cross Flow Fan Motor Output W 23 23
Speed Steps 5 Steps, Quiet, Auto 5 Steps, Quiet, Auto
Air Direction Control Right, Left, Horizontal, Downward Right, Left, Horizontal, Downward
Air Filter Removable / Washable / Mildew Proof Removable / Washable / Mildew Proof
Running Current (Rated) A 0.11-0.11-0.10 0.14-0.14-0.13 0.12-0.12-0.11 0.15-0.14-0.14
Power Consumption (Rated) W 24 30 26 32
Power Factor % 99.2-94.9-100.0 97.4-93.2-96.2 98.5-94.2-98.5 97.0-99.4-95.2
Temperature Control Microcomputer Control Microcomputer Control
Dimensions (H×W×D) mm 295×800×215 295×800×215
Packaged Dimensions (H×W×D) mm 274×870×366 274×870×366
Weight kg 10 10
Gross Weight kg 14 14
Operation
Sound ★H/M/L/SL dBA 42/38/33/30 42/38/33/30 43/39/34/31 44/39/34/31
Sound Power H dBA 58 58 59 60
Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes
Piping Connection Liquid mm φ 6.4 φ 6.4
Gas mm φ 9.5 φ12.7
Drain mm φ18.0 φ18.0
Drawing No. 3D063379 3D063380
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3

SiBE12-908 Specifications
Specifications 6
1.2 Outdoor Units 50Hz 220-230-240V
Note: 1. The data are based on the conditions shown in the table below.
2. ★: In humidifying operation, the operation sound increases by about 3dB in the outdoor unit.
Model 2MXU40GV1B
Cooling Heating
Capacity kW —
Power Consumption W —
Running Current A —
Casing Color Ivory White
Compressor Type Hermetically Sealed Swing Type Model 1YC23ABXD
Motor Output W 600
Refrigerant Oil Model FVC50K
Charge L 0.45
Refrigerant Type R-410A
Charge kg 1.20
Airflow Rate
m³/min HH 36 32 H33 32
L30 32
cfm HH 1,271 1,130 H 1,165 1,130
L 1,059 1,130
Fan Type Propeller
Motor Output W 50
Starting Current A 4.6
Dimensions (H×W×D) mm 675×765×285
Packaged Dimensions (H×W×D) mm 739×907×390
Weight kg 45
Gross Weight kg 49
Operation Sound ★dBA 47 48
Sound Power dBA 62 —
Piping Connection Liquid mm φ 6.4×2
Gas mm φ 9.5×2
Drain mm φ18
Heat Insulation Both Liquid & Gas Pipes
No. of Wiring Connection 3 for Power Supply, 4 for Interunit Wiring
Max. Interunit Piping Length m 30 (for Total of Each Room)
m 15 (for One Room)
Min. Interunit Piping Length m 3 (for One Room)
Amount of Additional Charge g/m 20 (20m or more)
Max. Installation Height Difference m 15 (between Indoor Unit and Outdoor Unit)
m 7.5 (between Indoor Units)
Drawing No. 3D063328A
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3
Cooling Heating Piping Length
Indoor ; 27°CDB/19°CWB
Outdoor ; 35°CDB Indoor ; 20°CDB Outdoor ; 7°CDB/6°CWB 5m

Specifications SiBE12-908
7Specifications
50Hz 220-230-240V
Note: 1. The data are based on the conditions shown in the table below.
2. ★: In humidifying operation, the operation sound increases by about 3dB in the outdoor unit.
Model 2MXU50GV1B
Cooling Heating
Capacity kW —
Power Consumption W —
Running Current A —
Casing Color Ivory White
Compressor Type Hermetically Sealed Swing Type Model 2YC36BXD
Motor Output W 1,100
Refrigerant Oil Model FVC50K
Charge L 0.65
Refrigerant Type R-410A
Charge kg 1.60
Airflow Rate
m³/min HH 37 34 H34 34
L34 34
cfm HH 1,306 1,200 H 1,200 1,200
L 1,200 1,200
Fan Type Propeller
Motor Output W 50
Starting Current A 6.3
Dimensions (H×W×D) mm 675×765×285
Packaged Dimensions (H×W×D) mm 739×907×390
Weight kg 49
Gross Weight kg 54
Operation Sound ★dBA 48 50
Sound Power dBA 63 —
Piping Connection Liquid mm φ 6.4×2
Gas mm φ9.5×1, φ12.7×1
Drain mm φ18.0
Heat Insulation Both Liquid and Gas Pipes
No. of Wiring Connection 3 for Power Supply, 4 for Interunit Wiring
Max. Interunit Piping Length m 30 (for Total of Each Room)
m 15 (for One Room)
Min. Interunit Piping Length m 3 (for One Room)
Amount of Additional Charge g/m 20 (20m or more)
Max. Installation Height Difference m 15 (between Indoor Unit and Outdoor Unit)
m 7.5 (between Indoor Units)
Drawing No. 3D063330A
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3
Cooling Heating Piping Length
Indoor ; 27°CDB/19°CWB
Outdoor ; 35°CDB Indoor ; 20°CDB Outdoor ; 7°CDB/6°CWB 5m

SiBE12-908
Printed Circuit Board Connector Wiring Diagram 8
Part 3
Printed Circuit Board
Connector Wiring Diagram
1. Printed Circuit Board Connector Wiring Diagram....................................9
1.1 Indoor Units..............................................................................................9
1.2 Outdoor Units .........................................................................................11

Printed Circuit Board Connector Wiring Diagram SiBE12-908
9Printed Circuit Board Connector Wiring Diagram
1. Printed Circuit Board Connector Wiring Diagram
1.1 Indoor Units
Connectors PCB(1) (Control PCB)
PCB(2) (Signal Receiver PCB)
PCB(3) (Display PCB)
PCB(4) (INTELLIGENT EYE sensor PCB)
Note: Other designations
PCB(1) (Control PCB)
PCB(3) (Display PCB)
1) S1 Connector for DC fan motor
2) S21 Connector for centralized control (HA)
3) S25 Connector for INTELLIGENT EYE sensor PCB
4) S32 Connector for heat exchanger thermistor
5) S41 Connector for swing motor
6) S46 Connector for display PCB
7) S47 Connector for signal receiver PCB
1) S48 Connector for control PCB
1) S49 Connector for control PCB
1) S26 Connector for control PCB
1) V1 Varistor
2) JA Address setting jumper
JB Fan speed setting when compressor is OFF on thermostat
JC Power failure recovery function (auto-restart)
∗Refer to page 256 for detail.
3) LED A LED for service monitor (green)
4) FU1 (F1U) Fuse (3.15A / 250V)
1) SW1 (S1W) Forced operation ON / OFF switch
2) LED1 LED for operation (multi-color)
3) LED2 LED for timer (yellow)
4) LED3 LED for INTELLIGENT EYE (green)
5) RTH1 (R1T) Room temperature thermistor