Table of Contents
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FXMA-A
VRV system air conditioner
4P680920-1 - 2022.01
14.1
Overview: About the box ................................................................................................................................................ 43
14.2
Indoor unit ...................................................................................................................................................................... 43
14.2.1
To unpack and handle the unit ...................................................................................................................... 43
14.2.2
To remove the accessories from the indoor unit .......................................................................................... 44
15.1
Identification ................................................................................................................................................................... 45
15.1.1
Identification label: Indoor unit ..................................................................................................................... 45
15.2
About the indoor unit ..................................................................................................................................................... 45
15.3
System layout.................................................................................................................................................................. 45
15.4
Combining units and options.......................................................................................................................................... 46
15.4.1
Possible options for the indoor unit............................................................................................................... 46
16.1
Preparing the installation site......................................................................................................................................... 48
16.1.1
Installation site requirements of the indoor unit .......................................................................................... 48
16.2
Mounting the indoor unit ............................................................................................................................................... 51
16.2.1
Guidelines when installing the indoor unit.................................................................................................... 51
16.2.2
Guidelines when installing the ducting.......................................................................................................... 53
16.2.3
Guidelines when installing the drain piping................................................................................................... 55
17.1
Preparing refrigerant piping ........................................................................................................................................... 59
17.1.1
Refrigerant piping requirements.................................................................................................................... 59
17.1.2
Refrigerant piping insulation.......................................................................................................................... 60
17.2
Connecting the refrigerant piping .................................................................................................................................. 60
17.2.1
About connecting the refrigerant piping ....................................................................................................... 60
17.2.2
Precautions when connecting the refrigerant piping.................................................................................... 61
17.2.3
Guidelines when connecting the refrigerant piping...................................................................................... 62
17.2.4
Pipe bending guidelines ................................................................................................................................. 62
17.2.5
To flare the pipe end ...................................................................................................................................... 62
17.2.6
To connect the refrigerant piping to the indoor unit .................................................................................... 63
18.1
About connecting the electrical wiring .......................................................................................................................... 65
18.1.1
Precautions when connecting the electrical wiring....................................................................................... 65
18.1.2
Guidelines when connecting the electrical wiring......................................................................................... 66
18.1.3
Specifications of standard wiring components.............................................................................................. 67
18.2
To connect the electrical wiring to the indoor unit ....................................................................................................... 68
19.1
Overview: Commissioning .............................................................................................................................................. 70
19.2
Precautions when commissioning .................................................................................................................................. 70
19.3
Checklist before commissioning..................................................................................................................................... 71
19.4
To perform a test run...................................................................................................................................................... 71
20.1
Field setting..................................................................................................................................................................... 72
22.1
Solving problems based on error codes ......................................................................................................................... 79
22.1.1
Error codes: Overview .................................................................................................................................... 79
24.1
Wiring diagram................................................................................................................................................................ 82
24.1.1
Unified wiring diagram legend ....................................................................................................................... 82
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85
Installer and user reference guide
3
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Table of Contents
Troubleshooting
