Daikin FTXP20M5V1B9 Product information sheet

User Reference Guide
Daikin room air conditioners
FTXP20M5V1B9
FTXP25M5V1B9
FTXP35M5V1B9

Table of contents
User Reference Guide
2
FTXP20~35M5V1B9
Daikin room air conditioners
4D520466-7C – 2020.03
Table of contents
1 General safety precautions 4
1.1 About the documentation .............................................................................................................................................. 4
1.1.1 Meaning of warnings and symbols ................................................................................................................ 4
1.2 For the user..................................................................................................................................................................... 5
2 About the documentation 7
2.1 About this document ...................................................................................................................................................... 7
2.2 User reference guide at a glance.................................................................................................................................... 7
3 About the system 9
3.1 Indoor unit ...................................................................................................................................................................... 9
3.1.1 Indoor unit display.......................................................................................................................................... 10
3.2 About the user interface................................................................................................................................................. 10
3.2.1 Components: User interface .......................................................................................................................... 11
3.2.2 Status: User interface LCD.............................................................................................................................. 12
3.2.3 To operate the user interface ........................................................................................................................ 14
4 Before operation 15
4.1 Overview: Before operation ........................................................................................................................................... 15
4.2 To insert the batteries .................................................................................................................................................... 15
4.3 To fix the user interface to the wall................................................................................................................................ 15
4.4 To turn on the power supply .......................................................................................................................................... 16
5 Operation 17
5.1 Operation range.............................................................................................................................................................. 17
5.2 When to use which feature ............................................................................................................................................ 17
5.3 Operation mode and temperature setpoint .................................................................................................................. 18
5.3.1 To start/stop operation mode and to set the temperature.......................................................................... 19
5.4 Airflow rate ..................................................................................................................................................................... 20
5.4.1 To adjust the airflow rate ............................................................................................................................... 21
5.5 Airflow direction ............................................................................................................................................................. 21
5.5.1 To adjust vertical airflow direction ................................................................................................................ 22
5.5.2 To adjust horizontal airflow direction............................................................................................................ 22
5.5.3 To use 3-D airflow direction ........................................................................................................................... 22
5.6 Comfort airflow operation.............................................................................................................................................. 23
5.6.1 To start/stop Comfort airflow operation ....................................................................................................... 23
5.7 Powerful operation ......................................................................................................................................................... 23
5.7.1 To start/stop Powerful operation .................................................................................................................. 24
5.8 Econo operation.............................................................................................................................................................. 25
5.8.1 To start/stop Econo operation ....................................................................................................................... 25
5.9 OFF/ON timer operation................................................................................................................................................. 25
5.9.1 To start/stop OFF timer operation................................................................................................................. 26
5.9.2 To start/stop ON timer operation .................................................................................................................. 26
5.9.3 To combine OFF timer and ON timer............................................................................................................. 27
6 Energy saving and optimum operation 28
7 Maintenance and service 30
7.1 Overview: Maintenance and service .............................................................................................................................. 30
7.2 To clean the indoor unit and user interface................................................................................................................... 31
7.3 To clean the front panel ................................................................................................................................................. 31
7.4 About the air filters......................................................................................................................................................... 32
7.5 To open the front panel.................................................................................................................................................. 32
7.6 To clean the air filters ..................................................................................................................................................... 32
7.7 To clean the titanium apatite deodorizing filter and the silver particle filter (Ag-ion filter) ........................................ 34
7.8 To replace the titanium apatite deodorizing filter and the silver particle filter (Ag-ion filter) ..................................... 34
7.9 To close the front panel.................................................................................................................................................. 35
7.10 To take following items into account before a long idle period.................................................................................... 35
8 Troubleshooting 36
8.1 Symptoms that are NOT system malfunctions............................................................................................................... 39
8.1.1 Symptom: A sound like water flowing is heard ............................................................................................. 39
8.1.2 Symptom: A blowing sound is heard.............................................................................................................. 39
8.1.3 Symptom: A ticking sound is heard................................................................................................................ 39
8.1.4 Symptom: A whistling sound is heard............................................................................................................ 39
8.1.5 Symptom: A clicking sound during operation or idle time is heard .............................................................. 39
8.1.6 Symptom: A clapping sound is heard............................................................................................................. 39

Table of contents
User Reference Guide
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FTXP20~35M5V1B9
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4D520466-7C – 2020.03
8.1.7 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 40
8.1.8 Symptom: The units can give off odours ....................................................................................................... 40
8.1.9 Symptom: The outdoor fan rotates while the air conditioner is not in operation ....................................... 40
8.2 Solving problems based on error codes ......................................................................................................................... 40
9 Disposal 42
10 Glossary 43

1 | General safety precautions
User Reference Guide
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FTXP20~35M5V1B9
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4D520466-7C – 2020.03
1 General safety precautions
1.1 About the documentation
▪The original documentation is written in English. All other languages are
translations.
▪The precautions described in this document cover very important topics, follow
them carefully.
▪The installation of the system, and all activities described in the installation
manual and in the installer reference guide MUST be performed by an authorised
installer.
1.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of extreme hot or cold
temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate injury.
NOTICE
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbols used on the unit:

1 | General safety precautions
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4D520466-7C – 2020.03
Symbol Explanation
Before installation, read the installation and operation
manual, and the wiring instruction sheet.
Before performing maintenance and service tasks, read the
service manual.
For more information, see the installer and user reference
guide.
The unit contains rotating parts. Be careful when servicing or
inspecting the unit.
Symbols used in the documentation:
Symbol Explanation
Indicates a figure title or a reference to it.
Example: " 1–3 Figure title" means "Figure 3 in chapter 1".
Indicates a table title or a reference to it.
Example: " 1–3 Table title" means "Table 3 in chapter 1".
1.2 For the user
WARNING
If you are NOT sure how to operate the unit, contact your
installer.
WARNING
This appliance is not intended for use by persons, including
children, with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their
safety.
Children should be supervised to ensure that they do not
play with the appliance.
Cleaning and user maintenance must not be carried out by
children without supervision.
WARNING
To prevent electrical shocks or fire:
▪Do NOT rinse the unit.
▪Do NOT operate the unit with wet hands.
▪Do NOT place any objects containing water on the unit.

1 | General safety precautions
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CAUTION
▪Do NOT place any objects or equipment on top of the
unit.
▪Do NOT sit, climb or stand on the unit.
▪Units are marked with the following symbol:
This means that electrical and electronic products may NOT be mixed with
unsorted household waste. Do NOT try to dismantle the system yourself: the
dismantling of the system, treatment of the refrigerant, of oil and of other parts
must be done by an authorized installer and must comply with applicable
legislation.
Units must be treated at a specialized treatment facility for reuse, recycling and
recovery. By ensuring this product is disposed of correctly, you will help to
prevent potential negative consequences for the environment and human
health. For more information, contact your installer or local authority.
▪Batteries are marked with the following symbol:
This means that the batteries may NOT be mixed with unsorted household
waste. If a chemical symbol is printed beneath the symbol, this chemical symbol
means that the battery contains a heavy metal above a certain concentration.
Possible chemical symbols are: Pb: lead (>0.004%).
Waste batteries must be treated at a specialized treatment facility for reuse. By
ensuring waste batteries are disposed of correctly, you will help to prevent
potential negative consequences for the environment and human health.

2 | About the documentation
User Reference Guide
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2 About the documentation
2.1 About this document
Thank you for purchasing this product. Please:
▪Keep the documentation for future reference.
Target audience
Endusers
INFORMATION
This appliance is intended to be used by expert or trained users in shops, in light
industry, and on farms, or for commercial and household use by lay persons.
Documentation set
This document is part of a documentation set. The complete set consists of:
▪General safety precautions:
-Safety instructions that you must read before operating your system
-Format: Paper (in the box of the indoor unit)
▪Operation manual:
-Quick guide for basic usage
-Format: Paper (in the box of the indoor unit)
▪User reference guide:
-Detailed step-by-step instructions and background information for basic and
advanced usage
-Format: Digital files on http://www.daikineurope.com/support-and-manuals/
product-information/
Latest revisions of the supplied documentation may be available on the regional
Daikin website or via your installer.
The original documentation is written in English. All other languages are
translations.
2.2 User reference guide at a glance
Chapter Description
General safety precautions Safety instructions that you MUST read before
operation
About the documentation What documentation exists for the user
About the system ▪Operation range
▪Description of indoor unit and user
interface
Before operation What to do before starting operation
Operation How and when to use certain features

2 | About the documentation
User Reference Guide
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Chapter Description
Energy saving and optimum
operation
How to save energy
Maintenance and service How to maintain and service the unit
Troubleshooting What to do in case of problems
Disposal How to dispose of the system
Glossary Definition of terms

3 | About the system
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3 About the system
WARNING: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
NOTICE
Do NOT use the system for other purposes. In order to avoid any quality
deterioration, do NOT use the unit for cooling precision instruments, food, plants,
animals, or works of art.
3.1 Indoor unit
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet or outlet. When the fan
is rotating at high speed, it will cause injury.
INFORMATION
The sound pressure level is less than 70dBA.
WARNING
▪Do not modify, disassemble, remove, reinstall or repair the unit yourself as
incorrect dismantling or installation may cause an electric shock or fire. Contact
your dealer.
▪In case of accidental refrigerant leaks, make sure there are no naked flames. The
refrigerant itself is entirely safe, non-toxic and mildly flammable, but it will
generate toxic gas when it accidentally leaks into a room where combustible air
from fan heaters, gas cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been repaired or corrected
before resuming operation.
INFORMATION
The following figures are just examples and may NOT completely match your system
layout.
a
e
f
g
b
c
d

3 | About the system
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aAir inlet
bAir outlet
cFront panel
dIndoor unit display
eAir filter
fTitanium apatite deodorizing filter
gSilver particle filter
ON/OFF button
If the user interface is missing, you can use the ON/OFF button on the indoor unit
to start/stop operation. When operation is started using this button, the following
settings are used:
▪Operation mode = Automatic
▪Temperature setting = 25°C
▪Airflow rate = Automatic
3.1.1 Indoor unit display
ON/OFF
a
b
c
d
aSignal receiver
bOperation lamp
cTimer lamp
dON/OFF button
ON/OFF button
If the user interface is missing, you can use the ON/OFF button on the indoor unit
to start/stop operation. When operation is started using this button, the following
settings are used:
▪Operation mode = Automatic
▪Temperature setting = 25°C
▪Airflow rate = Automatic
3.2 About the user interface
▪Direct sunlight. Do NOT expose the user interface to direct sunlight.
▪Dust. Dust on the signal transmitter or receiver will reduce sensitivity. Wipe off
dust with a soft cloth.
▪Fluorescent lights. Signal communication might be disabled if fluorescent lamps
are in the room. In that case, contact your installer.
▪Other appliances. If the user interface signals operate other appliances, move
the other appliances, or contact your installer.
▪Curtains. Make sure that the signal between the unit and the user interface is
NOT blocked by curtains or other objects.

3 | About the system
User Reference Guide
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NOTICE
▪Do NOT drop the user interface.
▪Do NOT let the user interface get wet.
3.2.1 Components: User interface
b
l
k
c
d
e
f
j
i
h
g
a
aSignal receiver
bOFF button
cFan setting button
dEcono operation button
eSwing buttons
fTimer setting buttons (ON, OFF, cancel)
gPowerful operation button
hComfort operation button
iTemperature adjustment button
jOperation mode buttons
kAutomatic operation mode button
lLCD display
b
d
c
f
h
e
m
l
k
i
j
a
g

3 | About the system
User Reference Guide
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aSignal transmitter
bLCD display
cON/OFF button
dFan setting button
eTemperature adjustment button
fSwing button
gTimer cancel button
hON timer button
iOFF timer button
jComfort airflow button
kEcono button
lMode selector button
mPowerful button
3.2.2 Status: User interface LCD
Icon Description
Operation mode = Automatic
Operation mode = Drying
Operation mode = Heating
Operation mode = Cooling
Operation mode = Fan only
Powerful operation is active
Econo operation is active
The indoor unit receives a signal from the user interface
Current temperature setting
Airflow rate = Automatic
Airflow rate = Indoor unit quiet
Airflow rate = High
Airflow rate = Medium high
Airflow rate = Medium
Airflow rate = Medium low
Airflow rate = Low
Comfort operation is active
Automatic vertical swing is active
Automatic horizontal swing is active

3 | About the system
User Reference Guide
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Icon Description
ON timer is active
OFF timer is active
Icon Description
Operation mode = Automatic
Operation mode = Drying
Operation mode = Heating
Operation mode = Cooling
Operation mode = Fan only
Powerful operation is active
Econo operation is active
Operation is active
The indoor unit receives a signal from
the user interface
Current temperature setting
Airflow rate = Automatic
Airflow rate = Indoor unit quiet
Airflow rate = High
Airflow rate = Medium high
Airflow rate = Medium
Airflow rate = Medium low
Airflow rate = Low
Comfort operation is active
Auto vertical swing is active
ON timer is active
OFF timer is active

3 | About the system
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3.2.3 To operate the user interface
a
aSignal receiver
a
aSignal receiver
1Aim the signal transmitter at the signal receiver on the indoor unit (maximum
distance for communication is 7m).
Result: When the indoor unit receives a signal from the user interface, you will
hear a sound:
Sound Description
Beep-beep Operation starts.
Beep Setting changes.
Long beep Operation stops.

4 | Before operation
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4 Before operation
4.1 Overview: Before operation
This chapter describes what you have to do before operating the unit.
Typical workflow
Before operation usually consist of the following stages:
▪Inserting the batteries in the user interface.
▪Fixing the user interface to the wall.
▪Turning on the power supply.
4.2 To insert the batteries
The batteries will last for about 1 year.
1Remove the back cover.
2Insert both batteries at once.
3Put the cover back.
2
3
1
AAA.LR03
2
3
1
AAA.LR03
4.3 To fix the user interface to the wall
c
ba
2×
aUser interface
bScrews (field supply)
cUser interface holder

4 | Before operation
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2×
b ca
aUser interface
bScrews (field supply)
cUser interface holder
1Choose a place where the signals reach the unit.
2Attach the holder with screws to the wall or a similar location.
3Hang the user interface on the user interface holder.
4.4 To turn on the power supply
1Turn the circuit breaker on.
Result: The flap of the indoor unit will open and close to set the reference position.

5 | Operation
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5 Operation
5.1 Operation range
Use the system in the following temperature and humidity ranges for safe and
effective operation.
Operation mode Operation range
Cooling(a)(b) ▪Outdoor temperature: –10~46°C DB
▪Indoor temperature: 18~32°C DB
▪Indoor humidity: ≤80%
Heating(a) ▪Outdoor temperature: –15~24°C DB
▪Indoor temperature: 10~30°C DB
Drying(a) ▪Outdoor temperature: –10~46°C DB
▪Indoor temperature: 18~32°C DB
▪Indoor humidity: ≤80%
(a) A safety device might stop the operation of the system if the unit runs outside its
operation range.
(b) Condensation and water dripping might occur if the unit runs outside its operation range.
5.2 When to use which feature
You can use the following table to determine which features to use:¨
Feature Tasks
Basic features
Operation modes and
temperature
To start/stop the system and to set the
temperature:
▪Heat up or cool down a room.
▪Blow air in a room without heating or cooling.
▪Decrease the humidity in a room.
▪In Automatic mode, automatically select an
appropriate temperature and operation
mode.
+ Airflow direction To adjust the airflow direction (swing or fixed
position).
Airflow rate To adjust the amount of air blown into the
room.
To run more quietly.
Advanced features
Econo To use the system when you are also using
other power-consuming appliances.
To save energy.

5 | Operation
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Feature Tasks
Comfort To provide a comfortable airflow that does NOT
come in direct contact with people.
Powerful To cool down or heat up the room quickly.
ON timer + OFF timer To automatically turn ON or OFF the system.
Feature Tasks
Basic features
Operation modes and
temperature
To start/stop the system and to set the
temperature:
▪Heat up or cool down a room.
▪Blow air in a room without heating or cooling.
▪Decrease the humidity in a room.
▪In Automatic mode, automatically select an
appropriate temperature and operation
mode.
Airflow direction To adjust the airflow direction (swing or fixed
position).
Airflow rate To adjust the amount of air blown into the
room.
To run more quietly.
Advanced features
Econo To use the system when you are also using
other power-consuming appliances.
To save energy.
Comfort To provide a comfortable airflow that does NOT
come in direct contact with people.
Powerful To cool down or heat up the room quickly.
ON timer + OFF timer To automatically turn ON or OFF the system.
5.3 Operation mode and temperature setpoint
When. Adjust the system operation mode and set the temperature when you want
to:
▪Heat up or cool down a room
▪Blow air in a room without heating or cooling
▪Decrease the humidity in a room
What. The system operates differently, depending on the user selection.
Setting Description
Automatic The system cools down or heats up a room to
the temperature setpoint. It automatically
switches between cooling and heating if
necessary.

5 | Operation
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Setting Description
Drying The system decreases the humidity in a room
without changing the temperature.
Heating The system heats up a room to the temperature
setpoint.
Cooling The system cools down a room to the
temperature setpoint.
Fan The system only controls the airflow (airflow
rate and airflow direction).
The system does NOT control the temperature.
Additional info:
▪Outside temperature. The system's cooling or heating effect decreases when the
outside temperature is too high or too low.
▪Defrost operation. During heating operation, frost might occur on the outdoor
unit and decrease the heating capacity. In that case, the system automatically
switches to defrosting operation to remove the frost. During defrosting
operation, hot air is NOT blown from the indoor unit.
5.3.1 To start/stop operation mode and to set the temperature
: Unit is operating.
: Operation mode = Automatic
: Operation mode = Drying
: Operation mode = Heating
: Operation mode = Cooling
: Operation mode = Fan only
: Shows the set temperature.
1Press one or more times to select the operation mode.
Result: The mode will be set in the following sequence:
2Press to start operation.
Result: is displayed on the LCD.
Result: The operation lamp lights up.
3Press or on the button one or more times to lower or raise the
temperature.
Note: When using drying or fan only mode, you cannot adjust the temperature.

5 | Operation
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4Press to stop operation.
Result: disappears from the LCD.
Result: The operation lamp goes off.
: Operation mode = Automatic
: Operation mode = Drying
: Operation mode = Heating
: Operation mode = Cooling
: Operation mode = Fan only
: Shows the set temperature.
5Start operation by pressing one of the following buttons.
Mode Press Result
Automatic operation
The operation lamp lights up.
Cooling operation
Drying operation
Heating operation
Fan only operation
6Press or on the button one or more times to set the temperature.
You CANNOT adjust the temperature in drying or fan only operation mode.
Cooling operation Heating operation Automatic
operation
Drying or fan only
operation
18~32°C 10~30°C 18~30°C —
7Press to stop operation.
Result: The operation lamp goes off.
5.4 Airflow rate
1Press to choose:
5 airflow rate levels, from " " to " "
Automatic operation
Indoor unit quiet operation. When the airflow is set to " ", the
noise from the unit will be reduced.
INFORMATION
▪If the unit reach the temperature setpoint in cooling, heating or automatic mode.
Fan will stop operating.
▪When using drying operation mode, you CANNOT adjust the airflow rate setting.