Table of contents
Installer reference guide
3
2MXM40+50A
R32 Split series
4P600463-4E – 2021.12
9 Electrical installation 47
9.1 About connecting the electrical wiring .......................................................................................................................... 47
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 47
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 49
9.1.3 Specifications of standard wiring components.............................................................................................. 50
9.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 50
10 Finishing the outdoor unit installation 52
10.1 To finish the outdoor unit installation............................................................................................................................ 52
10.2 To close the outdoor unit ............................................................................................................................................... 52
11 Configuration 53
11.1 About ECONO mode prohibition setting ........................................................................................................................ 53
11.1.1 To turn ON ECONO mode prohibition setting ............................................................................................... 53
11.2 About night quiet mode.................................................................................................................................................. 54
11.2.1 To turn ON the night quiet mode .................................................................................................................. 54
11.3 About heat mode lock .................................................................................................................................................... 54
11.3.1 To turn ON heat mode lock............................................................................................................................ 54
11.4 About standby electricity saving function ...................................................................................................................... 55
11.4.1 To turn ON standby electricity saving function ............................................................................................. 55
12 Commissioning 56
12.1 Overview: Commissioning .............................................................................................................................................. 56
12.2 Precautions when commissioning .................................................................................................................................. 56
12.3 Checklist before commissioning ..................................................................................................................................... 57
12.4 Checklist during commissioning ..................................................................................................................................... 57
12.5 Trial operation and testing ............................................................................................................................................. 58
12.5.1 To perform a test run ..................................................................................................................................... 58
12.6 Starting up the outdoor unit........................................................................................................................................... 58
13 Hand-over to the user 59
14 Maintenance and service 60
14.1 Overview: Maintenance and service .............................................................................................................................. 60
14.2 Maintenance safety precautions .................................................................................................................................... 60
14.3 Checklist for yearly maintenance of the outdoor unit................................................................................................... 61
14.4 About the compressor .................................................................................................................................................... 61
15 Troubleshooting 62
15.1 Overview: Troubleshooting ............................................................................................................................................ 62
15.2 Precautions when troubleshooting ................................................................................................................................ 62
15.3 Solving problems based on symptoms........................................................................................................................... 62
15.3.1 Symptom: Indoor units fall, vibrate or make noise ....................................................................................... 62
15.3.2 Symptom: The unit is NOT heating or cooling as expected........................................................................... 63
15.3.3 Symptom: Water leakage............................................................................................................................... 63
15.3.4 Symptom: Electrical leakage .......................................................................................................................... 63
15.3.5 Symptom: Unit does NOT function or burn damage..................................................................................... 63
15.4 Solving problems based on LED behaviour .................................................................................................................... 63
15.4.1 Fault diagnosis using LED on outdoor unit PCB ............................................................................................. 63
16 Disposal 65
16.1 Overview: Disposal.......................................................................................................................................................... 65
16.2 To pump down ................................................................................................................................................................ 65
16.3 To start and stop forced cooling..................................................................................................................................... 66
16.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch ....................................................... 66
16.3.2 To start and stop forced cooling using the indoor unit user interface ......................................................... 66
17 Technical data 67
17.1 Wiring diagram................................................................................................................................................................ 67
17.1.1 Unified wiring diagram legend ....................................................................................................................... 67
17.2 Piping diagram: Outdoor unit ......................................................................................................................................... 69
18 Glossary 71
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