Table of contents
Installer reference guide
2
3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1 – 2019.10
Table of contents
1 General safety precautions 3
1.1 About the documentation .......................................................... 3
1.1.1 Meaning of warnings and symbols.............................. 3
1.2 For the installer.......................................................................... 3
1.2.1 General ....................................................................... 3
1.2.2 Installation site ............................................................ 3
1.2.3 Refrigerant .................................................................. 5
1.2.4 Brine............................................................................ 6
1.2.5 Water .......................................................................... 6
1.2.6 Electrical ..................................................................... 6
2 About the documentation 7
2.1 About this document.................................................................. 7
2.2 Installer reference guide at a glance ......................................... 7
3 About the box 7
3.1 Overview: About the box ........................................................... 7
3.2 Outdoor unit............................................................................... 7
3.2.1 To unpack the outdoor unit ......................................... 7
3.2.2 To remove the accessories from the outdoor unit....... 8
4 About the units and options 8
4.1 Overview: About the units and options...................................... 8
4.2 Identification .............................................................................. 8
4.2.1 Identification label: Outdoor unit ................................. 8
5 Preparation 8
5.1 Overview: Preparation............................................................... 8
5.2 Preparing the installation site .................................................... 8
5.2.1 Installation site requirements of the outdoor unit ........ 9
5.2.2 Additional installation site requirements of the
outdoor unit in cold climates ....................................... 10
5.2.3 Refrigerant piping length and height difference .......... 10
5.3 Preparing refrigerant piping....................................................... 10
5.3.1 Refrigerant piping requirements.................................. 10
5.3.2 Refrigerant piping insulation ....................................... 11
5.4 Preparing electrical wiring ......................................................... 11
5.4.1 About preparing electrical wiring................................. 11
6 Installation 11
6.1 Overview: Installation ................................................................ 11
6.2 Opening the unit ........................................................................ 12
6.2.1 About opening the unit................................................ 12
6.2.2 To open the outdoor unit............................................. 12
6.3 Mounting the outdoor unit.......................................................... 12
6.3.1 About mounting the outdoor unit................................. 12
6.3.2 Precautions when mounting the outdoor unit.............. 12
6.3.3 To provide the installation structure............................ 12
6.3.4 To install the outdoor unit............................................ 13
6.3.5 To provide drainage.................................................... 13
6.3.6 To prevent the outdoor unit from falling over .............. 13
6.4 Connecting the refrigerant piping .............................................. 13
6.4.1 About connecting the refrigerant piping ...................... 13
6.4.2 Precautions when connecting the refrigerant piping... 14
6.4.3 Guidelines when connecting the refrigerant piping..... 14
6.4.4 Pipe bending guidelines.............................................. 14
6.4.5 To flare the pipe end................................................... 15
6.4.6 Connections between outdoor and indoor unit using
reducers ...................................................................... 15
6.4.7 Using the stop valve and service port......................... 16
6.4.8 To connect the refrigerant piping to the outdoor unit .. 17
6.5 Checking the refrigerant piping ................................................. 17
6.5.1 About checking the refrigerant piping ......................... 17
6.5.2 Precautions when checking the refrigerant piping ...... 17
6.5.3 To check for leaks....................................................... 17
6.5.4 To perform vacuum drying.......................................... 17
6.6 Charging refrigerant ................................................................... 18
6.6.1 About charging refrigerant ........................................... 18
6.6.2 Precautions when charging refrigerant ........................ 18
6.6.3 About the refrigerant .................................................... 18
6.6.4 To determine the additional refrigerant amount........... 19
6.6.5 To determine the complete recharge amount.............. 19
6.6.6 To charge additional refrigerant................................... 19
6.6.7 To fix the fluorinated greenhouse gases label ............. 19
6.7 Connecting the electrical wiring.................................................. 19
6.7.1 About connecting the electrical wiring.......................... 19
6.7.2 Precautions when connecting the electrical wiring ...... 19
6.7.3 Guidelines when connecting the electrical wiring ........ 20
6.7.4 Specifications of standard wiring components............. 20
6.7.5 To connect the electrical wiring on the outdoor unit..... 21
6.8 Finishing the outdoor unit installation ......................................... 21
6.8.1 To finish the outdoor unit installation ........................... 21
6.8.2 About standby electricity saving function..................... 22
6.8.3 About priority room function......................................... 22
6.8.4 About night quiet mode ................................................ 22
6.8.5 About heat mode lock .................................................. 22
6.8.6 About cool mode lock................................................... 23
6.8.7 To close the outdoor unit ............................................. 23
7 Commissioning 23
7.1 Overview: Commissioning.......................................................... 23
7.2 Precautions when commissioning .............................................. 23
7.3 Checklist before commissioning................................................. 23
7.4 Checklist during commissioning ................................................. 23
7.5 Trial operation and testing.......................................................... 24
7.5.1 About wiring error check .............................................. 24
7.5.2 To perform a test run ................................................... 24
7.6 Starting up the outdoor unit ........................................................ 24
7.7 Fault diagnosis using LED on outdoor unit PCB ........................ 25
8 Hand-over to the user 25
9 Maintenance and service 25
9.1 Overview: Maintenance and service .......................................... 25
9.2 Maintenance safety precautions................................................. 25
9.3 Checklist for yearly maintenance of the outdoor unit ................. 25
9.4 About the compressor ................................................................ 25
10 Troubleshooting 26
10.1 Overview: Troubleshooting......................................................... 26
10.2 Precautions when troubleshooting ............................................. 26
10.3 Solving problems based on symptoms....................................... 26
10.3.1 Symptom: Indoor units fall, vibrate or make noise....... 26
10.3.2 Symptom: The unit is NOT heating or cooling as
expected ...................................................................... 26
10.3.3 Symptom: Water leakage............................................. 26
10.3.4 Symptom: Electrical leakage........................................ 26
10.3.5 Symptom: Priority room setting does NOT function..... 26
10.3.6 Symptom: Unit does NOT function or burn damage.... 26
11 Disposal 27
11.1 Overview: Disposal..................................................................... 27
11.2 To pump down............................................................................ 27
11.3 To start and stop forced cooling ................................................. 27
12 Technical data 28
12.1 Wiring diagram ........................................................................... 28
12.1.1 Unified wiring diagram legend...................................... 28
12.2 Piping diagram: Outdoor unit...................................................... 29
13 Glossary 31
