Table of contents
Installer and user reference guide
2
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1D – 2024.03
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 14
For the user 17
4 User safety instructions 18
4.1 General ........................................................................................................................................................................... 18
4.2 Instructions for safe operation ...................................................................................................................................... 19
5 About the system 22
5.1 System layout ................................................................................................................................................................. 23
6 User interface 24
7 Operation 25
7.1 Before operation ............................................................................................................................................................ 25
7.2 Operation range ............................................................................................................................................................. 26
7.3 Operating the system..................................................................................................................................................... 27
7.3.1 About operating the system.......................................................................................................................... 27
7.3.2 About cooling, heating, fan only, and automatic operation......................................................................... 27
7.3.3 About the heating operation......................................................................................................................... 27
7.3.4 To operate the system (WITHOUT cool/heat changeover remote control switch)..................................... 28
7.3.5 To operate the system (WITH cool/heat changeover remote control switch) ............................................ 28
7.4 Using the dry program ................................................................................................................................................... 29
7.4.1 About the dry program.................................................................................................................................. 29
7.4.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) ................................... 29
7.4.3 To use the dry program (WITH cool/heat changeover remote control switch)........................................... 30
7.5 Adjusting the air flow direction...................................................................................................................................... 30
7.5.1 About the air flow flap................................................................................................................................... 30
7.6 Setting the master user interface .................................................................................................................................. 31
7.6.1 About setting the master user interface....................................................................................................... 31
7.6.2 To designate the master user interface (VRV DX and Hydrobox)................................................................. 32
7.7 About control systems ................................................................................................................................................... 32
8 Energy saving and optimum operation 34
8.1 Available main operation methods................................................................................................................................ 34
8.2 Available comfort settings.............................................................................................................................................. 35
9 Maintenance and service 36
9.1 Maintenance after a long stop period ........................................................................................................................... 36
9.2 Maintenance before a long stop period ........................................................................................................................ 37
9.3 About the refrigerant ..................................................................................................................................................... 37
9.4 After-sales service and warranty ................................................................................................................................... 37
9.4.1 Warranty period ............................................................................................................................................ 37
9.4.2 Recommended maintenance and inspection ............................................................................................... 38
9.4.3 Recommended maintenance and inspection cycles..................................................................................... 38
9.4.4 Shortened maintenance and replacement cycles......................................................................................... 39
10 Troubleshooting 40
10.1 Error codes: Overview.................................................................................................................................................... 41
10.2 Symptoms that are NOT system malfunctions .............................................................................................................. 44
10.2.1 Symptom: The system does not operate ...................................................................................................... 44
10.2.2 Symptom: Cool/Heat cannot be changed over............................................................................................. 44
10.2.3 Symptom: Fan operation is possible, but cooling and heating do not work................................................ 44
10.2.4 Symptom: The fan speed does not correspond to the setting..................................................................... 44
10.2.5 Symptom: The fan direction does not correspond to the setting ................................................................ 44
