Daikin VRV IV+ RXYTQ8U5YF, Installer And User Manual, Page: 2 / 144

Table of contents
Installer and user reference guide
2
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
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.............................................................................................................................................................. 25
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.......................................................................................................................... 26
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)............................................. 27
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) .................................... 28
7.4.3 To use the dry program (WITH cool/heat changeover remote control switch) ........................................... 28
7.5 Adjusting the air flow direction ...................................................................................................................................... 29
7.5.1
About the air flow flap.................................................................................................................................... 29
7.6 Setting the master user interface................................................................................................................................... 30
7.6.1
About setting the master user interface........................................................................................................ 30
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