Table of contents
Installer and user reference guide
2
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1B – 2021.02
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 24
7 Before operation 25
8 Operation 26
8.1 Operation range.............................................................................................................................................................. 26
8.2 Operating the system ..................................................................................................................................................... 26
8.2.1 About operating the system........................................................................................................................... 26
8.2.2 About cooling, heating, fan only, and automatic operation ......................................................................... 27
8.2.3 About the heating operation.......................................................................................................................... 27
8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch)...................................... 28
8.2.5 To operate the system (WITH cool/heat changeover remote control switch)............................................. 28
8.3 Using the dry program.................................................................................................................................................... 29
8.3.1 About the dry program................................................................................................................................... 29
8.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) .................................... 29
8.3.3 To use the dry program (WITH cool/heat changeover remote control switch) ........................................... 29
8.4 Adjusting the air flow direction ...................................................................................................................................... 30
8.4.1 About the air flow flap.................................................................................................................................... 30
8.5 Setting the master user interface................................................................................................................................... 31
8.5.1 About setting the master user interface........................................................................................................ 31
8.5.2 To designate the master user interface (VRV DX and Hydrobox) ................................................................. 32
8.6 About control systems .................................................................................................................................................... 32
9 Energy saving and optimum operation 33
9.1 Available main operation methods ................................................................................................................................ 33
9.2 Available comfort settings .............................................................................................................................................. 34
10 Maintenance and service 35
10.1 Maintenance after a long stop period............................................................................................................................ 35
10.2 Maintenance before a long stop period......................................................................................................................... 36
10.3 About the refrigerant...................................................................................................................................................... 36
10.4 After-sales service and warranty .................................................................................................................................... 36
10.4.1 Warranty period ............................................................................................................................................. 36
10.4.2 Recommended maintenance and inspection................................................................................................ 37
10.4.3 Recommended maintenance and inspection cycles ..................................................................................... 37
10.4.4 Shortened maintenance and replacement cycles ......................................................................................... 38
11 Troubleshooting 39
11.1 Error codes: Overview .................................................................................................................................................... 40
11.2 Symptoms that are NOT system malfunctions............................................................................................................... 43
11.2.1 Symptom: The system does not operate....................................................................................................... 43
11.2.2 Symptom: Cool/Heat cannot be changed over ............................................................................................. 43
11.2.3 Symptom: Fan operation is possible, but cooling and heating do not work ................................................ 43
11.2.4 Symptom: The fan speed does not correspond to the setting...................................................................... 43
