DAIKIN FTXF20D5V1B Room Air Conditioner User Manual

FTXF20D5V1B Room Air Conditioner

Operation manual
Daikin room air conditioner

FTXF20D5V1B FTXF25D5V1B FTXF35D5V1B FTXF42D5V1B

Operation manual Daikin room air conditioner

English

Table of contents
Table of contents

1 About the documentation

2

1.1 About this document………………………………………………………… 2

2 User safety instructions

2

2.1 General………………………………………………………………………….. 2

2.2 Instructions for safe operation …………………………………………… 3

3 About the system

4

3.1 Indoor unit ……………………………………………………………………… 4

3.2 About the user interface …………………………………………………… 5

3.2.1 Components: User interface ………………………………… 5

3.2.2 Status: User interface LCD ………………………………….. 5

3.2.3 To operate the user interface……………………………….. 6

4 Before operation

6

4.1 To mount the user interface holder ……………………………………. 6

4.2 To insert the batteries………………………………………………………. 6

4.3 To turn on the power supply……………………………………………… 6

5 Operation

6

5.1 Operation range ……………………………………………………………… 6

5.2 When to use which feature……………………………………………….. 6

5.3 Operation mode and temperature setpoint………………………….. 7

5.3.1 To start/stop operation mode and to set the temperature……………………………………………………….. 7

5.3.2 Airflow rate ………………………………………………………… 7

5.3.3 Airflow direction………………………………………………….. 8

5.3.4 Comfort airflow operation…………………………………….. 8

5.3.5 Powerful operation ……………………………………………… 8

5.3.6 Econo operation…………………………………………………. 9

5.3.7 OFF/ON timer operation ……………………………………… 9

6 Energy saving and optimum operation

9

7 Maintenance and service

10

7.1 Overview: Maintenance and service ………………………………….. 10

7.2 To clean the indoor unit and user interface …………………………. 11

7.3 To clean the front panel……………………………………………………. 11

7.4 About the air filters ………………………………………………………….. 11

7.5 To clean the air filters ………………………………………………………. 11

7.6 To take following items into account before a long idle period.. 11

8 Troubleshooting

11

8.1 Symptoms that are NOT system malfunctions …………………….. 12

8.1.1 Symptom: A sound like water flowing is heard ……….. 12

8.1.2 Symptom: A blowing sound is heard……………………… 12

8.1.3 Symptom: A ticking sound is heard……………………….. 12

8.1.4 Symptom: A whistling sound is heard ……………………. 12

8.1.5 Symptom: A clicking sound during operation or idle

time is heard ……………………………………………………… 12

8.1.6 Symptom: A clapping sound is heard ……………………. 12

8.1.7 Symptom: The outdoor fan rotates while the air

conditioner is not in operation ………………………………. 12

8.2 Solving problems based on error codes……………………………… 12

9 Disposal

13

1 About the documentation
1.1 About this document
Thank you for purchasing this product. Please: Read the documentation carefully before operating the user
interface to ensure the best possible performance.

Request the installer to inform you about the settings that he used to configure your system. Check if he has filled in the installer settings tables. If NOT, request him to do so.
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 User safety instructions
Always observe the following safety instructions and regulations.
2.1 General
WARNING If you are NOT sure how to operate the unit, contact your installer.
WARNING This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction

Operation manual
2

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

concerning use of the appliance in a safe way and understand the hazards involved. Children SHALL NOT play with the appliance. Cleaning and user maintenance SHALL NOT be made 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.
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 authorised installer and MUST comply with applicable legislation. Units MUST be treated at a specialised 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 specialised 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 User safety instructions
2.2 Instructions for safe operation
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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.
WARNING
Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electrical 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.
CAUTION
ALWAYS use a user interface to adjust the position of the flaps and louvers. When the flaps and louvers are swinging and you move them forcibly by hand, the mechanism will break.
CAUTION
NEVER expose little children, plants or animals directly to the airflow.
WARNING
Do NOT place objects below the indoor and/or outdoor unit that may get wet. Otherwise condensation on the unit or refrigerant pipes, air filter dirt or drain blockage may cause dripping, and objects under the unit may get dirty or damaged.

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Operation manual
3

3 About the system
WARNING
Do NOT place a flammable spray bottle near the air conditioner and do NOT use sprays near the unit. Doing so may result in a fire.
WARNING
The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.
Turn off any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.
Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.
WARNING
Do NOT pierce or burn refrigerant cycle parts.
Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer.
Be aware that the refrigerant inside the system is odourless.
WARNING
The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).
DANGER: RISK OF ELECTROCUTION
To clean the air conditioner or air filter, be sure to stop operation and turn all power supplies OFF. Otherwise, an electrical shock and injury may result.

CAUTION After a long use, check the unit stand and fitting for damage. If damaged, the unit may fall and result in injury.
WARNING Be careful with ladders when working in high places.
DANGER: RISK OF ELECTROCUTION Before cleaning, be sure to stop the operation, turn the breaker OFF or pull out the supply cord. Otherwise, an electrical shock and injury may result.
WARNING Stop operation and shut OFF the power if anything unusual occurs (burning smells etc.). Leaving the unit running under such circumstances may cause breakage, electrical shock or fire. Contact your dealer.
CAUTION This unit is equipped with electrically powered safety measures, such as a refrigerant leak detector. In order to be effective, the unit must be electrically powered at all times after installation, except for short service periods.
3 About the system
WARNING: MILDLY 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.
INFORMATION The following figures are just examples and may NOT completely match your system layout.

Operation manual
4

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

3 About the system
3.2.1 Components: User interface
a a
e

b cd

f g

ON/OFF

h ij
k

l

a Air inlet b Air outlet c Flap (horizontal blade) d Louvers (vertical blades) e Front panel f Model name plate g Room temperature sensor h Signal receiver i Operation indicator (green) j Timer lamp (orange) k Indoor unit ON/OFF switch l Air 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
3.2 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.
NOTICE
Do NOT drop the user interface.
Do NOT let the user interface get wet.

b

m

c

l

d

e

k

f

j g

i

h

3.2.2

a Signal transmitter b LCD display c ON/OFF button d Fan setting button e Temperature adjustment button f Swing button g Timer cancel button h ON timer button i OFF timer button j Comfort airflow button k Econo button l Mode selector button m Powerful button
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
Operation is active The indoor unit receives a signal from the user interface Current temperature setting

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Airflow rate = Automatic Airflow rate = Indoor unit quiet
Operation manual
5

4 Before operation

Icon

Description 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
3.2.3 To operate the user interface

3 Hang the user interface on the user interface holder.

4.2 To insert the batteries
The batteries will last for about 1 year. 1 Remove the back cover. 2 Insert both batteries at once. 3 Put the cover back.

3

1

2

AAA.LR03
4.3 To turn on the power supply
1 Turn the circuit breaker on. Result: The flap of the indoor unit will open and close to set the reference position.

a

a Signal receiver

1 Aim 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
4.1 To mount the user interface holder

ab

2×
c

a User interface b Screws (field supply) c User interface holder
1 Choose a place where the signals reach the unit.
2 Attach the holder with screws to the wall or a similar location.

Operation manual
6

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: ­10~48°C DB

Indoor temperature: 18~32°C DB

Heating(a)

Indoor humidity: 80% Outdoor temperature: ­15~24°C DB

Drying(a)

Indoor temperature: 10~30°C DB Outdoor temperature: ­10~48°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

To start/stop the system and to set the Operation modes and temperature: 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).

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Feature Airflow rate

Tasks
To adjust the amount of air blown into the room.

Advanced features Econo

To run more quietly.
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
ON timer + timer

OFF

To cool down or heat up the room quickly.
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 Automatic
Drying

Description
The system cools down or heats up a room to the temperature setpoint. It automatically switches between cooling and heating if necessary.
The system decreases the humidity in a room.

Heating Cooling

The system heats up a room to the temperature setpoint.
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

5 Operation
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.

1 Press

one or more times to select the operation mode.

Result: The mode will be set in the following sequence:

2 Press

to start operation.

Result:

is displayed on the LCD.

Result: The operation lamp lights up.

3 Press 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.

4 Press

to stop operation.

Result:

disappears from the LCD.

Result: The operation lamp goes off.

5.3.2 Airflow rate
INFORMATION
When using drying operation mode, you CANNOT adjust the airflow rate setting.
The airflow rate in heating mode will lower to avoid generating cold airflow. When temperature of the airflow rise, operation will continue at the set airflow rate.

1 Press

to choose:

5 airflow rate levels, from ” ” to ” ” Automatic airflow rate operation
Indoor unit quiet operation. When the airflow rate is set to ” “, the noise from the unit will be reduced.
INFORMATION If the unit reach the temperature setpoint:
in cooling or automatic mode. Fan will stop operating. in heating mode. Fan will operate in low airflow rate.

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Operation manual
7

5 Operation

To adjust the airflow rate

1 Press

to change the airflow setting as follows:

5.3.3 Airflow direction

When. Adjust the airflow direction as desired.

What. The system directs the airflow differently, depending on the user selection (swinging or fixed position). It does so by moving the vertical blades.

Setting

Airflow direction

Vertical auto swing Moves up and down.

[–]

Stays in a fixed position.

CAUTION
ALWAYS use a user interface to adjust the angle of the flap. When the flap is swinging and you move it forcibly by hand, the mechanism will break.
Be careful when adjusting the louvers. Inside the air outlet, a fan is rotating at high speed.
The movable range of the flap varies according to the operation mode. The flap will stop at the upper position when the airflow rate is changed to low during the up and down swing setting.

a cb

a Flap range in cooling or drying operation b Flap range in hating operation c Flap range in fan only operation
To adjust the airflow direction

1 To use auto swing, press

.

Result: will appear on the LCD. Result: The flap (horizontal blade) will begin to swing.

2 To use fixed position, press desired position.

when the flap reaches the

Result: disappears from the LCD.

To adjust the louvers (vertical blades)
1 Hold 1 or both knobs and move the louvers.

a

a

a Knobs

Operation manual
8

INFORMATION
When the unit is installed in a corner of a room, the direction of the louvers should be facing away from the wall. Efficiency will drop if a wall blocks the air.

5.3.4 Comfort airflow operation

This operation can be used in heating or cooling operation mode. It will provide a comfortable wind that will NOT come in direct contact with people. The system automatically sets the fixed airflow position upward in Cooling and downward in Heating operation mode.

Cooling operation mode

Heating operation mode

INFORMATION
Powerful and Comfort airflow operation CANNOT be used at the same time. The last selected function takes priority. If the vertical automatic swing is selected, Comfort airflow operation will be cancelled.
To start/stop Comfort airflow operation

1 Press

to start.

Result: The flap position will change, is displayed on the LCD, and the airflow rate is set to automatic.

Mode

Position of flap…

Cooling/Drying

Up

Heating

Down

Note: Comfort airflow operation is NOT available in Fan only mode.

2 Press

to stop.

Result: The flap will return to the position from before the Comfort airflow mode; disappears from the LCD.

5.3.5 Powerful operation
This operation quickly maximizes the cooling/heating effect in any operation mode. You can get the maximum capacity.
INFORMATION Powerful operation CANNOT be used together with Econo and Comfort airflow operation. The last selected function takes priority. Powerful operation will NOT increase the capacity of the unit if it already operates at maximum capacity.
To start/stop Powerful operation

1 Press

to start.

Result:

is displayed on the LCD. Powerful operation runs

for 20 minutes; after that, operation returns to the previously set

mode.

2 Press Result:

to stop. disappears from the LCD.

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Note: Powerful operation can be set only when the unit is running. If

you press be cancelled;

or if you change operation mode, operation will disappears from the LCD.

5.3.6 Econo operation
This is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances.
INFORMATION
Powerful and Econo operation CANNOT be used at the same time. The last selected function takes priority.
Econo operation reduces power consumption of the outdoor unit by limiting the rotation speed of the compressor. If power consumption is already low, Econo operation will NOT further reduce power consumption.

To start/stop Econo operation

1 Press

to start.

Result: is displayed on the LCD.

2 Press

to stop.

Result: disappears from the LCD.

5.3.7 OFF/ON timer operation
Timer functions are useful for automatically switching the air conditioner off/on at night or in the morning. You can also use OFF timer and ON timer in combination.
INFORMATION Program the timer again in case of:
A breaker has turned the unit off. A power failure. After replacing batteries in the user interface.

To start/stop ON timer operation

1 Press

to start.

Result: up.

is displayed on the LCD and the timer lamp lights

INFORMATION

Each time

is pressed, the time setting advances by

1 hour. The timer can be set between 1 to 12 hours.

2 Press

to stop.

Result: goes off.

disappears from the LCD and the timer lamp

To start/stop OFF timer operation

Use this feature if the unit is operating and you want to stop operation after a certain time.

1 Press

to start.

Result: up.

is displayed on the LCD and the timer lamp lights

6 Energy saving and optimum operation

INFORMATION

Each time

is pressed, the time setting advances by

1 hour. The timer can be set between 1 to 9 hours.

2 Press

to stop.

Result: goes off.

disappears from the LCD and the timer lamp

INFORMATION
When you set the ON/OFF timer, the time setting is stored in the memory. The memory will be reset when the user interface batteries are replaced.
Use of night set mode in combination with OFF timer
The air conditioner automatically adjusts the temperature setting (0.5°C up in cooling, 2.0°C down in heating) to prevent excessive cooling/heating and ensure a comfortable sleeping temperature.

To combine OFF timer and ON timer

1 To set the timers, refer to “To start/stop OFF timer operation” 4[ 9] and “To start/stop ON timer operation” 4[ 9].

Result:

and are displayed on the LCD.

2 Example of what is displayed on the LCD if you combine the 2

timers:

6 Energy saving and optimum operation
INFORMATION
Even if the unit is turned OFF, it consumes electricity.
When the power turns back on after a power break, the previously selected mode will be resumed.
CAUTION
NEVER expose little children, plants or animals directly to the airflow.
NOTICE
Do NOT place objects below the indoor and/or outdoor unit that may get wet. Otherwise condensation on the unit or refrigerant pipes, air filter dirt or drain blockage may cause dripping, and objects under the unit may get dirty or damaged.
WARNING
Do NOT place a flammable spray bottle near the air conditioner and do NOT use sprays near the unit. Doing so may result in a fire.
CAUTION
Do NOT operate the system when using a room fumigation-type insecticide. Chemicals could collect in the unit, and endanger the health of people who are hypersensitive to chemicals.
Observe the following precautions to ensure the system operates properly.
Prevent direct sunlight from entering a room during cooling operation by using curtains or blinds.
Make sure the area is well ventilated. Do NOT block any ventilation openings.

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Operation manual
9

7 Maintenance and service
Ventilate often. Extended use requires special attention to ventilation.
Keep doors and windows closed. If the doors and windows remain open, air will flow out of your room causing a decrease in the cooling or heating effect.
Be careful NOT to cool or heat too much. To save energy, keep the temperature setting at a moderate level.
NEVER place objects near the air inlet or the air outlet of the unit. Doing so may cause a reduced heating/cooling effect or stop operation.
Turn the breaker off when the unit is NOT used for longer periods of time. If the breaker is on, the unit consumes electricity. Before restarting the unit, turn the breaker on 6 hours before operation to ensure smooth running.
Condensation may form if the humidity is above 80% or if the drain outlet gets blocked.
Adjust the room temperature properly for a comfortable environment. Avoid excessive heating or cooling. Notice that it may take some time for the room temperature to reach the set temperature. Consider using the timer setting options.
Adjust the air flow direction to avoid cool air from gathering on the floor or warm air against the ceiling. (Up during cooling or dry operation to the ceiling and down during heating operation.)
Avoid direct air flow to room inhabitants.
Operate the system within the recommended temperature range (26~28°C for cooling and 20~24°C for heating) to save energy.
7 Maintenance and service
7.1 Overview: Maintenance and service
The installer has to perform a yearly maintenance.
About the refrigerant This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent. Formula to calculate the quantity in CO2 equivalent tonnes: GWP value of the refrigerant × total refrigerant charge [in kg] / 1000
Please contact your installer for more information.
WARNING The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.
Turn off any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.
Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.
Operation manual
10

WARNING Do NOT pierce or burn refrigerant cycle parts. Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer. Be aware that the refrigerant inside the system is odourless.
WARNING The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). NOTICE Maintenance MUST be done by an authorised installer or service agent. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. DANGER: RISK OF ELECTROCUTION To clean the air conditioner or air filter, be sure to stop operation and turn all power supplies OFF. Otherwise, an electrical shock and injury may result. 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. CAUTION After a long use, check the unit stand and fitting for damage. If damaged, the unit may fall and result in injury. CAUTION Do NOT touch the heat exchanger fins. These fins are sharp and could result in cutting injuries. WARNING Be careful with ladders when working in high places. NOTICE Maintenance MUST be done by an authorized installer or service agent. Use Daikin service parts only. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals.
FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

7.2 To clean the indoor unit and user interface
NOTICE Do NOT use gasoline, benzene, thinner, polishing powder or liquid insecticide. Possible consequence: Discoloration and deformation.
Do NOT use water or air of 40°C or higher. Possible consequence: Discoloration and deformation.
Do NOT use polishing compounds.
Do NOT use a scrubbing brush. Possible consequence: The surface finishing peels off.
As an end user, you may NEVER clean inside parts of the unit by yourself; this work must be performed by a qualified service person. Contact your dealer.
DANGER: RISK OF ELECTROCUTION Before cleaning, be sure to stop the operation, turn the breaker OFF or pull out the supply cord. Otherwise, an electrical shock and injury may result.
1 Clean with a soft cloth. If it is difficult to remove stains, use water or a neutral detergent.
7.3 To clean the front panel

1 Clean the front panel with a soft cloth. If it is difficult to remove stains, use water or a neutral detergent.
7.4 About the air filters
Operating the unit with dirty filters means that the filter: CANNOT deodorise the air, CANNOT clean the air, poor heating/cooling, causes odour.
7.5 To clean the air filters
1 Push the tab at the centre of each air filter, then pull it down. 2 Pull out the air filters.

1

2

3 Wash the air filters with water or clean them with a vacuum cleaner.

8 Troubleshooting

4 Soak in lukewarm water for about 10 to 15 minutes.

5 Install all filters back in their original positions.
INFORMATION
If the dust does NOT come off easily, wash them with a neutral detergent diluted in lukewarm water. Dry the air filters in the shade.
It is recommended to clean the air filters every 2 weeks.

7.6 To take following items into account before a long idle period
Operate the unit in fan only mode for several hours to dry the inside of the unit.

1 Press

and select fan only operation.

2 Press

to start operation.

3 After operation stops, turn the breaker off.

4 Clean the air filters and replace them in their original position.

5 Remove the batteries from the user interface.

INFORMATION
It is recommended to have periodical maintenance performed by a specialist. For specialist maintenance, contact your dealer. Maintenance costs shall be borne by the customer.
In certain operating conditions the inside of the unit may get dirty after several seasons of use. This results in poor performance.

8 Troubleshooting

If one of the following malfunctions occur, take the measures shown below and contact your dealer.

The system MUST be repaired by a qualified service person.

Malfunction
If a safety device such as a fuse, a breaker or an earth leakage breaker frequently actuates or the ON/OFF switch does NOT properly work.
If water leaks from the unit.

Measure Turn OFF the main power switch.
Stop the operation.

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Operation manual
11

8 Troubleshooting

Malfunction

Measure

The operation switch does NOT work Turn OFF the power

well.

supply.

If the user interface display indicates the Notify your installer and

unit number, the operation lamp flashes report the malfunction

and the malfunction code appears.

code.

If the system does NOT operate properly except for the above mentioned cases and none of the above mentioned malfunctions is evident, investigate the system in accordance with the following procedures.

INFORMATION
Refer to the reference guide located on http:// www.daikineurope.com/support- and-manuals/productinformation/ for more troubleshooting tips.

If after checking all above items, it is impossible to fix the problem yourself, contact your installer and state the symptoms, the complete model name of the unit (with manufacturing number if possible) and the installation date (possibly listed on the warranty card).

WARNING
Stop operation and shut OFF the power if anything unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may cause breakage, electrical shock or fire. Contact your dealer.

8.1 Symptoms that are NOT system malfunctions
The following symptoms are NOT system malfunctions:
8.1.1 Symptom: A sound like water flowing is heard
This sound is caused by the refrigerant flowing in the unit. This sound may be generated when water is flowing away from
the unit during cooling or drying operation.
8.1.2 Symptom: A blowing sound is heard
This sound is generated when the direction of the refrigerant flow is changed (e.g. when switching from cooling to heating).
8.1.3 Symptom: A ticking sound is heard
This sound is generated when the unit slightly expands or contracts with changes in temperature.
8.1.4 Symptom: A whistling sound is heard
This sound is generated by the refrigerant flowing during defrost operation.
8.1.5 Symptom: A clicking sound during operation or idle time is heard
This sound is generated when the refrigerant control valves or electrical parts operate.
8.1.6 Symptom: A clapping sound is heard
This sound is generated when an external device sucks air out of the room (e.g. exhaust fan, extractor hood) while the doors and windows in the room are closed. Open the doors or windows, or turn off the device.

Operation manual
12

8.1.7 Symptom: The outdoor fan rotates while the air conditioner is not in operation
After operation has stopped. The outdoor fan continues to rotate for another 30 seconds for system protection.
While the air conditioner is not in operation. When the outdoor temperature is very high, the outdoor fan starts to rotate for system protection.

8.2 Solving problems based on error codes

Fault diagnosis by user interface
If the unit runs into a problem, you can identify the fault by checking the error code by the user interface. It is important to understand the problem and take measures before resetting the error code. This should be done by a licensed installer or your local dealer.

INFORMATION See the service manual for:
The complete list of error codes
A more detailed troubleshooting guideline for each error

To check the error code by the user interface
1 Aim the user interface at the unit and press 5 seconds.

for about

Result: blinks in the temperature setting display section.

2 Aim the user interface at the unit and press until a continuous beep is heard.

repeatedly

Result: The code is now displayed on the display.

INFORMATION
A short beep and 2 consecutive beeps indicate noncorresponding codes.

To cancel the code display, hold

for 5 seconds.

The code will also disappear from the display if the

button is NOT pressed within 1 minute.

System Error code Description
Normal Refrigerant shortage Overvoltage detection Signal transmission error (between indoor and outdoor unit) Indoor/outdoor unit combination fault

Indoor unit Error code Description
Indoor unit PCB abnormality Freeze-up protection or high-pressure control Fan motor (DC motor) abnormality Indoor heat exchanger thermistor abnormality Room temperature thermistor abnormality

Outdoor unit Error code Description
4-way valve abnormality Outdoor unit PCB abnormality Overload activation (compressor overload) Compressor lock

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Error code

Description DC fan lock Input power overcurrent Discharge pipe temperature control High-pressure control (in cooling mode) Compressor system sensor abnormality Position sensor abnormality DC voltage / current sensor abnormality Outdoor temperature thermistor abnormality Discharge pipe thermistor abnormality Outdoor heat exchanger thermistor abnormality Electrical parts heat error Radiation fin temperature rise Inverter instantaneous overcurrent (DC) Radiation fin thermistor abnormality Compressor internal temperature error

9 Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery.

9 Disposal

FTXF20~42D5V1B Daikin room air conditioner 3P520336-14P ­ 2021.09

Operation manual
13

Copyright 2021 Daikin

DAIKIN ISITMA VE SOUTMA SSTEMLER SAN.TC. A..
Gülsuyu Mahallesi, Fevzi Çakmak Caddesi, Burçak Sokak, No:20, 34848 Maltepe STANBUL / TÜRKYE Tel: 0216 453 27 00
Faks: 0216 671 06 00
Çari Merkezi: 444 999 0 Web: www.daikin.com.tr

Verantwortung für Energie und Umwelt

3P520336-14P 2021.09

References

• Daikin Global | A leading air conditioning and refrigeration innovator and provider for residential,commercial and industrial applications
• Internet - DENV | Daikin
• Internet - DENV | Daikin
• Internet - DENV | Daikin

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>