Daikin ATXS35EV1B7 User manual

SiBE04 - 824
[Applied Models]
zInverter Pair : Heat Pump
Inverter Pair
Wall Mounted Type E-Series

SiBE04-824
Table of Contents i
Inverter Pair
E-Series
zHeat Pump
Indoor Unit
ATXS25EV1B7
ATXS35EV1B7
ATXS50EV1B7
Outdoor Unit
ARXS25F3V1B
ARXS35F3V1B
ARXS50E3V1B

SiBE04-824
ii Table of Contents
1. Introduction .............................................................................................v
1.1 Safety Cautions ........................................................................................v
1.2 Used Icons .............................................................................................. ix
Part 1 List of Functions ................................................................ 1
1. List of Functions ......................................................................................2
Part 2 Specifications .................................................................... 3
1. Specifications ..........................................................................................4
Part 3 Printed Circuit Board Connector Wiring Diagram ............. 7
1. Printed Circuit Board Connector Wiring Diagram....................................8
1.1 Indoor Unit................................................................................................8
1.2 Outdoor Unit ...........................................................................................10
Part 4 Function and Control....................................................... 15
1. Main Functions......................................................................................16
1.1 Frequency Principle................................................................................16
1.2 Airflow Direction Control.........................................................................18
1.3 Fan Speed Control for Indoor Units........................................................19
1.4 Programme Dry Function .......................................................................20
1.5 Automatic Operation...............................................................................21
1.6 Thermostat Control.................................................................................22
1.7 NIGHT SET Mode ..................................................................................23
1.8 ECONO Mode ........................................................................................24
1.9 INTELLIGENT EYE ................................................................................25
1.10 Inverter POWERFUL Operation .............................................................27
1.11 Other Functions......................................................................................28
2. Function of Thermistor ..........................................................................30
3. Control Specification .............................................................................31
3.1 Mode Hierarchy ......................................................................................31
3.2 Frequency Control..................................................................................32
3.3 Controls at Mode Changing / Start-up....................................................34
3.4 Discharge Pipe Temperature Control.....................................................36
3.5 Input Current Control..............................................................................37
3.6 Freeze-up Protection Control .................................................................38
3.7 Heating Peak-cut Control .......................................................................38
3.8 Fan Control.............................................................................................39
3.9 Liquid Compression Protection Function 2.............................................39
3.10 Defrost Control .......................................................................................40
3.11 Electronic Expansion Valve Control .......................................................41
3.12 Malfunctions ...........................................................................................44
3.13 Forced Operation Mode .........................................................................45
3.14 Additional Function.................................................................................45
3.15 Facility Setting Jumper (cooling at low outdoor temperature) ................46
Part 5 Operation Manual ............................................................. 47
1. System Configuration............................................................................48

SiBE04-824
Table of Contents iii
2. Instruction..............................................................................................49
2.1 Safety precautions..................................................................................49
2.2 Name of Parts ........................................................................................51
2.3 Preparation Before Operation ................................................................54
2.4 AUTO · DRY · COOL · HEAT · FAN Operation ......................................57
2.5 Adjusting the Airflow Direction................................................................59
2.6 POWERFUL Operation ..........................................................................61
2.7 OUTDOOR UNIT QUIET Operation.......................................................62
2.8 ECONO Operation .................................................................................63
2.9 INTELLIGENT EYE Operation ...............................................................64
2.10 TIMER Operation ...................................................................................66
2.11 Care and Cleaning .................................................................................68
2.12 Troubleshooting......................................................................................71
Part 6 Service Diagnosis............................................................. 75
1. Caution for Diagnosis............................................................................76
2. Problem Symptoms and Measures .......................................................77
3. Service Check Function ........................................................................78
4. Troubleshooting ....................................................................................81
4.1 Error Codes and Description ..................................................................81
4.2 Indoor Unit PCB Abnormality .................................................................82
4.3 Freeze-up Protection Control or High Pressure Control.........................83
4.4 Fan Motor (DC Motor) or Related Abnormality.......................................85
4.5 Thermistor or Related Abnormality (Indoor Unit)....................................87
4.6 Signal Transmission Error (between Indoor and Outdoor Unit) .............88
4.7 Unspecified Voltage (between Indoor and Outdoor Units) .....................90
4.8 Outdoor Unit PCB Abnormality...............................................................91
4.9 OL Activation (Compressor Overload) ...................................................93
4.10 Compressor Lock ...................................................................................94
4.11 DC Fan Lock ..........................................................................................95
4.12 Input Over Current Detection .................................................................96
4.13 Four Way Valve Abnormality..................................................................99
4.14 Discharge Pipe Temperature Control...................................................101
4.15 High Pressure Control in Cooling .........................................................103
4.16 Compressor System Sensor Abnormality ............................................105
4.17 Position Sensor Abnormality ................................................................108
4.18 DC Voltage / Current Sensor Abnormality............................................109
4.19 CT or Related Abnormality ...................................................................110
4.20 Thermistor or Related Abnormality (Outdoor Unit)...............................112
4.21 Electrical Box Temperature Rise..........................................................114
4.22 Radiation Fin Temperature Rise ..........................................................116
4.23 Output Over Current Detection.............................................................120
4.24 Insufficient Gas.....................................................................................122
4.25 Over-voltage Detection.........................................................................126
4.26 Signal Transmission Error (on Outdoor Unit PCB)...............................127
5. Check ..................................................................................................128
5.1 How to Check .......................................................................................128

SiBE04-824
iv Table of Contents
Part 7 Removal Procedure ........................................................ 137
1. Indoor Unit...........................................................................................138
1.1 Removal of Air Filter.............................................................................138
1.2 Removal of Front Panel........................................................................140
1.3 Removal of Front Grille ........................................................................142
1.4 Removal of Horizontal Blades and Vertical Blades ..............................145
1.5 Removal of Electrical Box ....................................................................148
1.6 Removal of PCB...................................................................................151
1.7 Removal of Drain Pan Unit...................................................................157
1.8 Removal of Fan Motor..........................................................................161
1.9 Removal of Heat Exchanger ................................................................163
1.10 Removal of Fan Rotor ..........................................................................166
2. Outdoor Unit........................................................................................169
2.1 ARXS 25/35 F ......................................................................................169
2.2 ARXS 50 E ...........................................................................................194
Part 8 Others ............................................................................. 217
1. Others .................................................................................................218
1.1 Test Run from the Remote Controller ..................................................218
1.2 Jumper Settings ...................................................................................219
1.3 Application of Silicon Grease to a Power Transistor and
a Diode Bridge......................................................................................220
Part 9 Appendix......................................................................... 221
1. Piping Diagrams..................................................................................222
1.1 Indoor Units ..........................................................................................222
1.2 Outdoor Units .......................................................................................223
2. Wiring Diagrams..................................................................................224
2.1 Indoor Units ..........................................................................................224
2.2 Outdoor Units .......................................................................................225
Index ............................................................................................. i
Drawings & Flow Charts ................................................................ v

SiBE04-824 Introduction
v
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 may cause an
electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or
inspecting the circuits, do not touch any electrically charged sections of the
equipment.
If the refrigerant gas is discharged during the repair work, do not touch the
discharged refrigerant gas.
The refrigerant gas may cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the
welded section, evacuate the refrigerant gas completely at a well-ventilated
place first.
If there is a gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges 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 SiBE04-824
vi
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.

SiBE04-824 Introduction
vii
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.
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 cable may cause an electrical shock or fire.
Placing heavy items on the power cable, and heating or pulling the power cable
may damage the cable.
Do not mix air or gas other than the specified refrigerant (R410A / R22) in the
refrigerant system.
If air enters the refrigerating system, an excessively high pressure results,
causing equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leaking point and repair it
before charging the refrigerant. After charging refrigerant, make sure that there
is no refrigerant leak.
If the leaking point cannot be located and the repair work must be stopped, be
sure to perform pump-down and close the service valve, to prevent the
refrigerant gas from leaking into the room. The refrigerant gas itself is
harmless, but it may generate toxic gases when it 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 SiBE04-824
viii
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.

SiBE04-824 Introduction
ix
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 and seal are not installed properly, water may enter the 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 there is danger that the reader, through
incorrect manipulation, may damage 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.