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Table of contents
Installer reference guide
2
2(A)MXM40+50M(3)(4)V1B(9)_2(A)MXF40+50A2V1B
R32 Split series
4P600463-2 – 2019.10
Table of contents
About the documentation ..........................................................
Meaning of warnings and symbols..............................
For the installer..........................................................................
General .......................................................................
Installation site ............................................................
Refrigerant ..................................................................
Brine............................................................................
Water ..........................................................................
Electrical .....................................................................
About this document..................................................................
Installer reference guide at a glance .........................................
Overview: About the box ...........................................................
Outdoor unit...............................................................................
To unpack the outdoor unit .........................................
To remove the accessories from the outdoor unit.......
Overview: About the units and options......................................
Identification ..............................................................................
Identification label: Outdoor unit .................................
Overview: Preparation ...............................................................
Preparing the installation site ....................................................
Installation site requirements of the outdoor unit ........
Refrigerant piping length and height difference .......... 10
Preparing refrigerant piping .......................................................
Refrigerant piping requirements.................................. 10
Refrigerant piping insulation ....................................... 11
Preparing electrical wiring .........................................................
About preparing electrical wiring................................. 11
Overview: Installation ................................................................
Opening the unit ........................................................................
About opening the unit ................................................ 11
To open the outdoor unit............................................. 11
Mounting the outdoor unit..........................................................
About mounting the outdoor unit................................. 12
Precautions when mounting the outdoor unit.............. 12
To provide the installation structure ............................ 12
To install the outdoor unit............................................ 12
To provide drainage .................................................... 12
To prevent the outdoor unit from falling over .............. 13
Connecting the refrigerant piping ..............................................
About connecting the refrigerant piping ...................... 13
Precautions when connecting the refrigerant piping ... 13
Guidelines when connecting the refrigerant piping ..... 14
Pipe bending guidelines.............................................. 14
To flare the pipe end ................................................... 14
Using the stop valve and service port ......................... 15
To connect the refrigerant piping to the outdoor unit .. 16
Checking the refrigerant piping .................................................
About checking the refrigerant piping ......................... 16
Precautions when checking the refrigerant piping ...... 16
To check for leaks....................................................... 16
To perform vacuum drying .......................................... 16
Charging refrigerant ................................................................... 17
About charging refrigerant ........................................... 17
Precautions when charging refrigerant ........................ 17
About the refrigerant .................................................... 17
To determine the additional refrigerant amount ........... 18
To determine the complete recharge amount .............. 18
To charge additional refrigerant ................................... 18
To fix the fluorinated greenhouse gases label ............. 18
Connecting the electrical wiring.................................................. 18
About connecting the electrical wiring.......................... 18
Precautions when connecting the electrical wiring ...... 19
Guidelines when connecting the electrical wiring ........ 19
Specifications of standard wiring components............. 20
To connect the electrical wiring on the outdoor unit..... 20
Finishing the outdoor unit installation ......................................... 20
To finish the outdoor unit installation ........................... 20
About ECONO mode prohibition setting ...................... 21
About night quiet mode ................................................ 21
About heat mode lock .................................................. 21
About standby electricity saving function ..................... 21
To close the outdoor unit ............................................. 22
Overview: Commissioning .......................................................... 22
Precautions when commissioning .............................................. 22
Checklist before commissioning ................................................. 22
Checklist during commissioning ................................................. 22
Trial operation and testing .......................................................... 22
To perform a test run ................................................... 23
Starting up the outdoor unit ........................................................ 23
Fault diagnosis using LED on outdoor unit PCB ........................ 23
Overview: Maintenance and service .......................................... 23
Maintenance safety precautions................................................. 23
Checklist for yearly maintenance of the outdoor unit ................. 23
About the compressor ................................................................ 23
Overview: Troubleshooting......................................................... 24
Precautions when troubleshooting ............................................. 24
Solving problems based on symptoms....................................... 24
Symptom: Indoor units fall, vibrate or make noise ....... 24
Symptom: Water leakage............................................. 24
Symptom: Electrical leakage........................................ 24
Symptom: Unit does NOT function or burn damage .... 24
Overview: Disposal..................................................................... 24
To pump down............................................................................ 25
To start and stop forced cooling ................................................. 25
Wiring diagram ........................................................................... 25
Unified wiring diagram legend...................................... 25
Piping diagram: Outdoor unit...................................................... 26