Daikin FXNA40A2VEB Handleiding

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Installer and user reference guide

VRV system air conditioner

FXNA20A2VEB

FXNA25A2VEB

FXNA32A2VEB

FXNA40A2VEB

FXNA50A2VEB

FXNA63A2VEB

Table of contents

Installer and user reference guide

FXNA-A

VRV system air conditioner

4P785124-1 – 2024.09

Table of contents

1 About the documentation 4

1.1 About this document...................................................................................................................................................... 4

2 General safety precautions 6

2.1 About the documentation.............................................................................................................................................. 6

2.1.1 Meaning of warnings and symbols................................................................................................................ 6

2.2 For the installer .............................................................................................................................................................. 7

2.2.1 General........................................................................................................................................................... 7

2.2.2 Installation site............................................................................................................................................... 8

2.2.3 Refrigerant — in case of R410A or R32......................................................................................................... 8

2.2.4 Electrical......................................................................................................................................................... 10

3 Specific installer safety instructions 13

3.1 Instructions for equipment using R32 refrigerant......................................................................................................... 15

3.1.1 Installation space requirements.................................................................................................................... 17

For the user 18

4 User safety instructions 19

4.1 General ........................................................................................................................................................................... 19

4.2 Instructions for safe operation ...................................................................................................................................... 20

5 About the system 25

5.1 System layout ................................................................................................................................................................. 25

5.2 Information requirements for fan coil units.................................................................................................................. 26

6 User interface 27

7 Before operation 28

8 Operation 29

8.1 Operation range ............................................................................................................................................................. 29

8.2 About operation modes ................................................................................................................................................. 29

8.2.1 Basic operation modes .................................................................................................................................. 29

8.2.2 Special heating operation modes.................................................................................................................. 30

8.3 To operate the system ................................................................................................................................................... 30

9 Energy saving and optimum operation 31

10 Maintenance and service 32

10.1 Precautions for maintenance and service ..................................................................................................................... 32

10.2 Cleaning the air filter and air outlet............................................................................................................................... 33

10.2.1 To clean the air filter...................................................................................................................................... 33

10.2.2 To clean the air outlet.................................................................................................................................... 34

10.3 Maintenance before a long stop period ........................................................................................................................ 34

10.4 Maintenance after a long stop period........................................................................................................................... 34

10.5 About the refrigerant ..................................................................................................................................................... 34

10.5.1 About the refrigerant leakage sensor ........................................................................................................... 35

11 Troubleshooting 37

11.1 Symptoms that are NOT system malfunctions.............................................................................................................. 38

11.1.1 Symptom: The system does not operate ...................................................................................................... 38

11.1.2 Symptom: White mist comes out of a unit (Indoor unit).............................................................................. 39

11.1.3 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)....................................................... 39

11.1.4 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes......... 39

11.1.5 Symptom: Noise of air conditioners (Indoor unit) ........................................................................................ 39

11.1.6 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ................................................................. 39

11.1.7 Symptom: Dust comes out of the unit .......................................................................................................... 39

11.1.8 Symptom: The units can give off odours....................................................................................................... 39

12 Relocation 40

13 Disposal 41

For the installer 42

Table of contents

Installer and user reference guide

FXNA-A

VRV system air conditioner

4P785124-1 – 2024.09

14 About the box 43

14.1 Indoor unit...................................................................................................................................................................... 43

14.1.1 To unpack and handle the unit...................................................................................................................... 43

14.1.2 To remove the accessories from the indoor unit.......................................................................................... 43

15 About the units and options 45

15.1 Identification .................................................................................................................................................................. 45

15.1.1 Identification label: Indoor unit..................................................................................................................... 45

15.2 About the indoor unit..................................................................................................................................................... 45

15.3 System layout ................................................................................................................................................................. 46

15.4 Combining units and options ......................................................................................................................................... 46

15.4.1 Possible options for the indoor unit.............................................................................................................. 46

16 Unit installation 48

16.1 Preparing the installation site ........................................................................................................................................ 48

16.1.1 Installation site requirements of the indoor unit.......................................................................................... 48

16.2 Mounting the indoor unit............................................................................................................................................... 50

16.2.1 Guidelines when installing the indoor unit ................................................................................................... 50

16.2.2 Guidelines when installing the ducting ......................................................................................................... 55

16.2.3 Guidelines when installing the drain piping .................................................................................................. 56

17 Piping installation 59

17.1 Preparing refrigerant piping........................................................................................................................................... 59

17.1.1 Refrigerant piping requirements................................................................................................................... 59

17.1.2 Refrigerant piping insulation ......................................................................................................................... 60

17.2 Connecting the refrigerant piping.................................................................................................................................. 60

17.2.1 About connecting the refrigerant piping ...................................................................................................... 60

17.2.2 Precautions when connecting the refrigerant piping ................................................................................... 61

17.2.3 Guidelines when connecting the refrigerant piping ..................................................................................... 62

17.2.4 Pipe bending guidelines................................................................................................................................. 62

17.2.5 To flare the pipe end ..................................................................................................................................... 62

17.2.6 To connect the refrigerant piping to the indoor unit ................................................................................... 63

18 Electrical installation 65

18.1 About connecting the electrical wiring.......................................................................................................................... 65

18.1.1 Precautions when connecting the electrical wiring...................................................................................... 65

18.1.2 Guidelines when connecting the electrical wiring........................................................................................ 66

18.1.3 Specifications of standard wiring components............................................................................................. 67

18.2 To connect the electrical wiring to the indoor unit....................................................................................................... 68

19 Commissioning 71

19.1 Overview: Commissioning.............................................................................................................................................. 71

19.2 Precautions when commissioning ................................................................................................................................. 71

19.3 Checklist before commissioning .................................................................................................................................... 72

19.4 To perform a test run..................................................................................................................................................... 72

20 Configuration 74

20.1 Field setting .................................................................................................................................................................... 74

21 Hand-over to the user 78

22 Troubleshooting 79

22.1 Solving problems based on error codes ........................................................................................................................ 79

22.1.1 Error codes: Overview ................................................................................................................................... 79

23 Disposal 81

24 Technical data 82

24.1 Wiring diagram ............................................................................................................................................................... 82

24.1.1 Unified wiring diagram legend ...................................................................................................................... 82

25 Glossary 85