Daikin RXYN10B7Y1B Bedienungsanleitung

Daikin Durchlauferhitzer und Boiler RXYN10B7Y1B

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Installer and user reference guide

CO₂ VRV heat pump

RXYN10B7Y1B

Table of contents

Installer and user reference guide

RXYN10B7Y1B

CO₂ VRV heat pump

4P773664-1 – 2025.02

Table of contents

1 About this document 6

1.1 Meaning of warnings and symbols ................................................................................................................................ 6

2 General safety precautions 8

2.1 For the installer .............................................................................................................................................................. 8

2.1.1 General........................................................................................................................................................... 8

2.1.2 Installation site............................................................................................................................................... 9

2.1.3 Refrigerant — in case of R744....................................................................................................................... 10

2.1.4 Electrical......................................................................................................................................................... 12

3 Specific installer safety instructions 14

For the user 22

4 User safety instructions 23

4.1 General ........................................................................................................................................................................... 23

4.2 Instructions for safe operation ...................................................................................................................................... 24

5 About the system 28

5.1 System layout ................................................................................................................................................................. 29

6 User interface 30

7 Operation 31

7.1 Before operation ............................................................................................................................................................ 31

7.2 Operation range ............................................................................................................................................................. 31

7.3 Field piping pressure ...................................................................................................................................................... 32

7.4 Operating the system..................................................................................................................................................... 32

7.4.1 About operating the system.......................................................................................................................... 32

7.4.2 About cooling, heating, fan only, and automatic operation......................................................................... 32

7.4.3 About the heating operation......................................................................................................................... 32

7.4.4 To operate the system................................................................................................................................... 33

7.5 Using the dry program ................................................................................................................................................... 33

7.5.1 About the dry program.................................................................................................................................. 33

7.5.2 To use the dry program ................................................................................................................................. 33

7.6 Adjusting the air flow direction...................................................................................................................................... 34

7.6.1 About the air flow flap................................................................................................................................... 34

7.7 Setting the master user interface .................................................................................................................................. 35

7.7.1 About setting the master user interface....................................................................................................... 35

7.7.2 To designate the master user interface ........................................................................................................ 35

8 Energy saving and optimum operation 36

8.1 Available main operation methods................................................................................................................................ 36

9 Maintenance and service 38

9.1 Precautions for maintenance and service ..................................................................................................................... 38

9.2 Maintenance before a long stop period ........................................................................................................................ 38

9.3 Maintenance after a long stop period ........................................................................................................................... 38

9.4 About the refrigerant ..................................................................................................................................................... 39

9.5 After-sales service .......................................................................................................................................................... 39

9.5.1 Recommended maintenance and inspection ............................................................................................... 39

9.5.2 Recommended maintenance and inspection cycles..................................................................................... 40

9.5.3 Shortened maintenance and replacement cycles......................................................................................... 40

10 Troubleshooting 42

10.1 Error codes: Overview.................................................................................................................................................... 43

10.2 Symptoms that are NOT system malfunctions .............................................................................................................. 46

10.2.1 Symptom: The system does not operate ...................................................................................................... 46

10.2.2 Symptom: Cool/Heat cannot be changed over............................................................................................. 46

10.2.3 Symptom: Fan operation is possible, but cooling and heating do not work................................................ 46

10.2.4 Symptom: The fan speed does not correspond to the setting..................................................................... 46

10.2.5 Symptom: The fan direction does not correspond to the setting ................................................................ 46

10.2.6 Symptom: White mist comes out of a unit (Indoor unit).............................................................................. 47

10.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)....................................................... 47

10.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes......... 47

10.2.9 Symptom: Noise of air conditioners (Indoor unit) ........................................................................................ 47