Table of contents
Installer and user reference guide
2
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1C – 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 ................................................................................................................................................................. 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 ............................................................................................... 35
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 .............................................................................................................. 41
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
