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Side 1/44
Installer and user reference guide
VRV IV system air conditioner
RXMLQ8T7Y1B*
RXYLQ10T7Y1B*
RXYLQ12T7Y1B*
RXYLQ14T7Y1B*
Table of contents
Installer and user reference guide
2
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1C – 2025.01
Table of contents
1 About the documentation 6
1.1 About this document...................................................................................................................................................... 6
1.2 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 R410A or R32......................................................................................................... 9
2.1.4 Electrical......................................................................................................................................................... 11
3 Specific installer safety instructions 13
For the user 16
4 User safety instructions 17
4.1 General ........................................................................................................................................................................... 17
4.2 Instructions for safe operation ...................................................................................................................................... 18
5 About the system 21
5.1 System layout ................................................................................................................................................................. 22
6 User interface 23
7 Operation 24
7.1 Before operation ............................................................................................................................................................ 24
7.2 Operation range ............................................................................................................................................................. 24
7.3 Operating the system..................................................................................................................................................... 25
7.3.1 About operating the system.......................................................................................................................... 25
7.3.2 About cooling, heating, fan only, and automatic operation......................................................................... 25
7.3.3 About the heating operation......................................................................................................................... 25
7.3.4 To operate the system (WITHOUT cool/heat changeover remote control switch)..................................... 26
7.3.5 To operate the system (WITH cool/heat changeover remote control switch) ............................................ 26
7.4 Using the dry program ................................................................................................................................................... 27
7.4.1 About the dry program.................................................................................................................................. 27
7.4.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) ................................... 27
7.4.3 To use the dry program (WITH cool/heat changeover remote control switch)........................................... 28
7.5 Adjusting the air flow direction...................................................................................................................................... 28
7.5.1 About the air flow flap................................................................................................................................... 28
7.6 Setting the master user interface .................................................................................................................................. 29
7.6.1 About setting the master user interface....................................................................................................... 29
7.6.2 To designate the master user interface (VRV DX and Hydrobox)................................................................. 30
7.7 About control systems ................................................................................................................................................... 30
8 Energy saving and optimum operation 31
8.1 Available main operation methods................................................................................................................................ 31
8.2 Available comfort settings.............................................................................................................................................. 32
9 Maintenance and service 33
9.1 Maintenance after a long stop period ........................................................................................................................... 33
9.2 Maintenance before a long stop period ........................................................................................................................ 34
9.3 About the refrigerant ..................................................................................................................................................... 34
9.4 After-sales service and warranty ................................................................................................................................... 34
9.4.1 Warranty period ............................................................................................................................................ 34
9.4.2 Recommended maintenance and inspection ............................................................................................... 34
9.4.3 Recommended maintenance and inspection cycles..................................................................................... 35
9.4.4 Shortened maintenance and replacement cycles......................................................................................... 36
10 Troubleshooting 37
10.1 Error codes: Overview.................................................................................................................................................... 38
10.2 Symptoms that are NOT system malfunctions .............................................................................................................. 40
10.2.1 Symptom: The system does not operate ...................................................................................................... 41
10.2.2 Symptom: Cool/Heat cannot be changed over............................................................................................. 41
10.2.3 Symptom: Fan operation is possible, but cooling and heating do not work................................................ 41
10.2.4 Symptom: The fan speed does not correspond to the setting..................................................................... 41
10.2.5 Symptom: The fan direction does not correspond to the setting ................................................................ 41
Table of contents
Installer and user reference guide
3
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1C – 2025.01
10.2.6 Symptom: White mist comes out of a unit (Indoor unit).............................................................................. 41
10.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)....................................................... 42
10.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes......... 42
10.2.9 Symptom: Noise of air conditioners (Indoor unit) ........................................................................................ 42
10.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ................................................................. 42
10.2.11 Symptom: Noise of air conditioners (Outdoor unit) ..................................................................................... 42
10.2.12 Symptom: Dust comes out of the unit .......................................................................................................... 42
10.2.13 Symptom: The units can give off odours....................................................................................................... 42
10.2.14 Symptom: The outdoor unit fan does not spin............................................................................................. 42
10.2.15 Symptom: The display shows "88" ................................................................................................................ 43
10.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation................. 43
10.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped................................... 43
10.2.18 Symptom: Hot air can be felt when the indoor unit is stopped ................................................................... 43
11 Relocation 44
12 Disposal 45
13 Technical data 46
13.1 Eco Design requirements ............................................................................................................................................... 46
For the installer 47
14 About the box 48
14.1 About LOOP BY DAIKIN................................................................................................................................................... 48
14.2 To unpack the outdoor unit ........................................................................................................................................... 49
14.3 To remove the accessories from the outdoor unit........................................................................................................ 49
14.4 Accessory pipes: Diameters ........................................................................................................................................... 50
14.5 To remove the transportation stay................................................................................................................................ 50
15 About the units and options 51
15.1 Identification label: Outdoor unit .................................................................................................................................. 51
15.2 About the outdoor unit .................................................................................................................................................. 52
15.3 System layout ................................................................................................................................................................. 52
15.4 Combining units and options ......................................................................................................................................... 53
15.4.1 About combining units and options .............................................................................................................. 53
15.4.2 Possible combinations of indoor units .......................................................................................................... 53
15.4.3 Possible combinations of outdoor units........................................................................................................ 53
15.4.4 Possible options for the outdoor unit ........................................................................................................... 54
16 Unit installation 56
16.1 Preparing the installation site ........................................................................................................................................ 56
16.1.1 Installation site requirements of the outdoor unit ....................................................................................... 56
16.1.2 Additional installation site requirements of the outdoor unit in cold climates ........................................... 58
16.1.3 Securing safety against refrigerant leaks ...................................................................................................... 59
16.2 Opening the unit ............................................................................................................................................................ 61
16.2.1 About opening the units................................................................................................................................ 61
16.2.2 To open the outdoor unit .............................................................................................................................. 61
16.2.3 To open the switch box of the outdoor unit ................................................................................................. 62
16.3 Mounting the outdoor unit............................................................................................................................................ 62
16.3.1 To provide the installation structure............................................................................................................. 62
17 Piping installation 64
17.1 Preparing refrigerant piping........................................................................................................................................... 64
17.1.1 Refrigerant piping requirements................................................................................................................... 64
17.1.2 Refrigerant piping insulation ......................................................................................................................... 65
17.1.3 To select the piping size................................................................................................................................. 65
17.1.4 To select refrigerant branch kits ................................................................................................................... 68
17.1.5 About the piping length................................................................................................................................. 69
17.1.6 Piping length: VRV DX only ............................................................................................................................ 70
17.1.7 Piping length: VRV DX and Hydrobox ............................................................................................................ 73
17.1.8 Piping length: VRV DX and RA DX .................................................................................................................. 74
17.1.9 Piping length: AHU......................................................................................................................................... 75
17.1.10 Multiple outdoor units: Possible layouts....................................................................................................... 77
17.2 Connecting the refrigerant piping.................................................................................................................................. 78
17.2.1 About connecting the refrigerant piping ...................................................................................................... 78
17.2.2 Precautions when connecting the refrigerant piping ................................................................................... 79
17.2.3 Multiple outdoor units: Knockout holes ....................................................................................................... 79
17.2.4 To route the refrigerant piping...................................................................................................................... 80
17.2.5 To connect the refrigerant piping to the outdoor unit................................................................................. 80

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Merke: Daikin
Kategori: Ikke kategorisert
Modell: RXYLQ12T7Y1B

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