Table of contents
Installer and user reference guide
3
FXMQ-A
VRV system air conditioner
4P701548-1 – 2022.07
15 About the units and options 38
15.1 Identification ................................................................................................................................................................... 38
15.1.1 Identification label: Indoor unit ..................................................................................................................... 38
15.2 About the indoor unit ..................................................................................................................................................... 38
15.3 System layout.................................................................................................................................................................. 38
15.4 Combining units and options.......................................................................................................................................... 39
15.4.1 Possible options for the indoor unit............................................................................................................... 39
16 Unit installation 40
16.1 Preparing the installation site......................................................................................................................................... 40
16.1.1 Installation site requirements of the indoor unit .......................................................................................... 40
16.2 Mounting the indoor unit ............................................................................................................................................... 42
16.2.1 Guidelines when installing the indoor unit.................................................................................................... 42
16.2.2 Guidelines when installing the ducting.......................................................................................................... 44
16.2.3 Guidelines when installing the drain piping................................................................................................... 45
17 Piping installation 49
17.1 Preparing refrigerant piping ........................................................................................................................................... 49
17.1.1 Refrigerant piping requirements.................................................................................................................... 49
17.1.2 Refrigerant piping insulation.......................................................................................................................... 50
17.2 Connecting the refrigerant piping .................................................................................................................................. 50
17.2.1 About connecting the refrigerant piping ....................................................................................................... 50
17.2.2 Precautions when connecting the refrigerant piping.................................................................................... 51
17.2.3 Guidelines when connecting the liquid piping............................................................................................... 52
17.2.4 Guidelines when connecting the gas piping .................................................................................................. 53
17.2.5 To connect the refrigerant piping to the indoor unit .................................................................................... 54
18 Electrical installation 56
18.1 About connecting the electrical wiring .......................................................................................................................... 56
18.1.1 Precautions when connecting the electrical wiring....................................................................................... 56
18.1.2 Guidelines when connecting the electrical wiring......................................................................................... 57
18.1.3 Specifications of standard wiring components.............................................................................................. 58
18.2 To connect the electrical wiring to the indoor unit ....................................................................................................... 59
19 Commissioning 62
19.1 Overview: Commissioning .............................................................................................................................................. 62
19.2 Precautions when commissioning .................................................................................................................................. 62
19.3 Checklist before commissioning ..................................................................................................................................... 63
19.4 To perform a test run...................................................................................................................................................... 64
20 Configuration 65
20.1 Field setting..................................................................................................................................................................... 65
21 Hand-over to the user 70
22 Troubleshooting 71
22.1 Solving problems based on error codes ......................................................................................................................... 71
22.1.1 Error codes: Overview .................................................................................................................................... 71
23 Disposal 72
24 Technical data 73
24.1 Wiring diagram................................................................................................................................................................ 73
24.1.1 Unified wiring diagram legend ....................................................................................................................... 73
25 Glossary 76
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