Table of contents
Installation and operation manual
6
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1A – 2020.01
Table of contents
1 About the documentation 7
1.1 About this document.................................................................. 7
2 Specific installer safety instructions 7
2.1 Instructions for equipment using R32 refrigerant ...................... 9
2.1.1 Installation space requirements .................................. 9
2.1.2 System layout requirements ....................................... 9
2.1.3 To determine the charge limitations............................ 11
For the user 14
3 User safety instructions 14
3.1 General...................................................................................... 14
3.2 Instructions for safe operation ................................................... 14
4 About the system 15
4.1 System layout............................................................................ 15
5 User interface 16
6 Operation 16
6.1 Operation range ........................................................................ 16
6.2 Operating the system ................................................................ 16
6.2.1 About operating the system ........................................ 16
6.2.2 About cooling, heating, fan only, and automatic
operation..................................................................... 16
6.2.3 About the heating operation........................................ 16
6.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch)............................. 16
6.2.5 To operate the system (WITH cool/heat changeover
remote control switch)................................................. 16
6.3 Using the dry program............................................................... 17
6.3.1 About the dry program ................................................ 17
6.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch)............................. 17
6.3.3 To use the dry program (WITH cool/heat changeover
remote control switch)................................................. 17
6.4 Adjusting the air flow direction................................................... 17
6.4.1 About the air flow flap ................................................. 17
6.5 Setting the master user interface .............................................. 18
6.5.1 About setting the master user interface ...................... 18
6.5.2 To designate the master user interface ...................... 18
7 Maintenance and service 18
7.1 About the refrigerant.................................................................. 18
7.2 After-sales service and warranty ............................................... 19
7.2.1 Warranty period .......................................................... 19
7.2.2 Recommended maintenance and inspection.............. 19
8 Troubleshooting 19
8.1 Error codes: Overview............................................................... 20
8.2 Symptoms that are NOT system malfunctions .......................... 20
8.2.1 Symptom: The system does not operate .................... 20
8.2.2 Symptom: Cool/Heat cannot be changed over ........... 20
8.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work..................................................... 21
8.2.4 Symptom: The fan speed does not correspond to the
setting ......................................................................... 21
8.2.5 Symptom: The fan direction does not correspond to
the setting ................................................................... 21
8.2.6 Symptom: White mist comes out of a unit (Indoor
unit)............................................................................. 21
8.2.7 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit)........................................................ 21
8.2.8 Symptom: The user interface reads "U4" or "U5" and
stops, but then restarts after a few minutes................ 21
8.2.9 Symptom: Noise of air conditioners (Indoor unit)........ 21
8.2.10 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................. 21
8.2.11 Symptom: Noise of air conditioners (Outdoor unit)...... 21
8.2.12 Symptom: Dust comes out of the unit.......................... 21
8.2.13 Symptom: The units can give off odours...................... 21
8.2.14 Symptom: The outdoor unit fan does not spin ............. 21
8.2.15 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation ....................... 21
8.2.16 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped .................................. 21
8.2.17 Symptom: Hot air can be felt when the indoor unit is
stopped ........................................................................ 21
9 Relocation 21
10 Disposal 22
For the installer 22
11 About the box 22
11.1 Outdoor unit................................................................................ 22
11.1.1 To unpack the outdoor unit .......................................... 22
11.1.2 To handle the outdoor unit........................................... 22
11.1.3 To remove the accessories from the outdoor unit........ 22
12 Unit installation 23
12.1 Preparing the installation site ..................................................... 23
12.1.1 Installation site requirements of the outdoor unit ......... 23
12.1.2 Additional installation site requirements of the
outdoor unit in cold climates ........................................ 23
12.2 Opening and closing the unit...................................................... 23
12.2.1 To open the outdoor unit.............................................. 23
12.2.2 To close the outdoor unit ............................................. 23
12.3 Mounting the outdoor unit........................................................... 24
12.3.1 To provide the installation structure............................. 24
12.3.2 To install the outdoor unit............................................. 24
12.3.3 To provide drainage..................................................... 24
12.3.4 To prevent the outdoor unit from falling over ............... 25
13 Piping installation 25
13.1 Preparing refrigerant piping........................................................ 25
13.1.1 Refrigerant piping requirements................................... 25
13.1.2 Refrigerant piping material........................................... 25
13.1.3 To select the piping size .............................................. 25
13.1.4 To select refrigerant branch kits................................... 26
13.2 Connecting the refrigerant piping ............................................... 26
13.2.1 To remove the spun pipes ........................................... 26
13.2.2 To connect the refrigerant piping to the outdoor unit ... 26
13.2.3 To connect the refrigerant branching kit ...................... 27
13.3 Checking the refrigerant piping .................................................. 28
13.3.1 Checking refrigerant piping: Setup............................... 28
13.3.2 To perform a leak test.................................................. 28
13.3.3 To perform vacuum drying........................................... 28
13.3.4 To check for leaks after charging refrigerant ............... 28
14 Charging refrigerant 28
14.1 Precautions when charging refrigerant....................................... 28
14.2 To determine the additional refrigerant amount ......................... 29
14.3 To charge refrigerant.................................................................. 29
14.4 Error codes when charging refrigerant ....................................... 30
14.5 To fix the fluorinated greenhouse gases label............................ 30
14.6 To check for refrigerant leaks after charging.............................. 31
15 Electrical installation 31
15.1 About electrical compliance........................................................ 31
15.2 Safety device requirements........................................................ 31
15.3 To connect the electrical wiring to the outdoor unit .................... 31
15.4 To connect the external outputs ................................................. 33
16 Finishing the outdoor unit installation 33
16.1 To insulate the refrigerant piping................................................ 33
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