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RXM-A, ARXM-A
R32 split series
4P718129-3A - 2023.07
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......................................................................................... 48
9.1.3
Specifications of standard wiring components.............................................................................................. 50
9.2
To connect the electrical wiring to the outdoor unit..................................................................................................... 50
10.1
To finish the outdoor unit installation............................................................................................................................ 52
10.2
Closing the unit ............................................................................................................................................................... 52
10.2.1
To close the outdoor unit............................................................................................................................... 52
11.1
Facility setting ................................................................................................................................................................. 53
11.1.1
To set the facility mode.................................................................................................................................. 53
11.2
Standby electricity saving function................................................................................................................................. 53
11.2.1
About the standby electricity saving function ............................................................................................... 53
11.2.2
To turn ON standby electricity saving function ............................................................................................. 54
12.1
Precautions when commissioning .................................................................................................................................. 55
12.2
Checklist before commissioning..................................................................................................................................... 55
12.3
Checklist during commissioning ..................................................................................................................................... 56
12.4
To perform a test run...................................................................................................................................................... 56
12.5
Starting up the outdoor unit........................................................................................................................................... 57
14.1
Overview: Maintenance and service .............................................................................................................................. 60
14.2
Maintenance safety precautions.................................................................................................................................... 60
14.3
Checklist for yearly maintenance of the outdoor unit................................................................................................... 60
14.4
About the compressor .................................................................................................................................................... 60
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
Fault diagnosis using LED on outdoor unit PCB.............................................................................................................. 63
16.1
Overview: Disposal.......................................................................................................................................................... 64
16.2
To pump down ................................................................................................................................................................ 64
16.3
To start and stop forced cooling..................................................................................................................................... 65
16.3.1
To start and stop forced cooling using the indoor unit ON/OFF switch ....................................................... 65
16.3.2
To start and stop forced cooling using the indoor unit user interface ......................................................... 65
17.1
Wiring diagram................................................................................................................................................................ 66
17.1.1
Unified wiring diagram legend ....................................................................................................................... 66
17.2
Piping diagram ................................................................................................................................................................ 69
17.2.1
Piping diagram: Outdoor unit......................................................................................................................... 69
Table of contents
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52
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55
58
59
62
64
66
71
Installer reference guide
3
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