Daikin VRV IV+ RXYTQ8U5/U7YF Installation And Operation Manual

Table of contentsInstallation and operation manual2RXYTQVRV IV+ heat pump for high ambient temperatures4P546223-1C – 2021.11Table of contents1 About the documentation 31.1 About this document.................................................................. 32 Specific installer safety instructions 3For the user 43 User safety instructions 43.1 General...................................................................................... 43.2 Instructions for safe operation ................................................... 54 About the system 64.1 System layout............................................................................ 65 User interface 66 Operation 66.1 Operation range ........................................................................ 66.2 Operating the system ................................................................ 76.2.1 About operating the system ........................................ 76.2.2 About cooling, heating, fan only, and automaticoperation ..................................................................... 76.2.3 About the heating operation........................................ 76.2.4 To operate the system (WITHOUT cool/heatchangeover remote control switch) ............................. 76.2.5 To operate the system (WITH cool/heat changeoverremote control switch)................................................. 76.3 Using the dry program............................................................... 86.3.1 About the dry program ................................................ 86.3.2 To use the dry program (WITHOUT cool/heatchangeover remote control switch) ............................. 86.3.3 To use the dry program (WITH cool/heat changeoverremote control switch)................................................. 86.4 Adjusting the air flow direction................................................... 86.4.1 About the air flow flap ................................................. 86.5 Setting the master user interface .............................................. 86.5.1 About setting the master user interface ...................... 87 Maintenance and service 97.1 About the refrigerant.................................................................. 97.2 After-sales service and warranty ............................................... 97.2.1 Warranty period .......................................................... 97.2.2 Recommended maintenance and inspection.............. 98 Troubleshooting 98.1 Error codes: Overview............................................................... 108.2 Symptoms that are NOT system malfunctions .......................... 118.2.1 Symptom: The system does not operate .................... 118.2.2 Symptom: Cool/Heat cannot be changed over ........... 118.2.3 Symptom: Fan operation is possible, but cooling andheating do not work..................................................... 118.2.4 Symptom: The fan speed does not correspond to thesetting ......................................................................... 118.2.5 Symptom: The fan direction does not correspond tothe setting ................................................................... 118.2.6 Symptom: White mist comes out of a unit (Indoorunit) ............................................................................. 118.2.7 Symptom: White mist comes out of a unit (Indoorunit, outdoor unit) ........................................................ 118.2.8 Symptom: The user interface reads "U4" or "U5" andstops, but then restarts after a few minutes ................ 118.2.9 Symptom: Noise of air conditioners (Indoor unit)........ 118.2.10 Symptom: Noise of air conditioners (Indoor unit,outdoor unit)................................................................ 118.2.11 Symptom: Noise of air conditioners (Outdoor unit) ..... 118.2.12 Symptom: Dust comes out of the unit ......................... 128.2.13 Symptom: The units can give off odours..................... 128.2.14 Symptom: The outdoor unit fan does not spin ............ 128.2.15 Symptom: The display shows "88"............................... 128.2.16 Symptom: The compressor in the outdoor unit doesnot stop after a short heating operation ....................... 128.2.17 Symptom: The inside of an outdoor unit is warmeven when the unit has stopped .................................. 128.2.18 Symptom: Hot air can be felt when the indoor unit isstopped ........................................................................ 129 Relocation 1210 Disposal 12For the installer 1211 About the box 1211.1 About ............................................................................ 1211.2 To remove the accessories from the outdoor unit ...................... 1211.3 Accessory pipes: Diameters....................................................... 1211.4 To remove the transportation stay.............................................. 1212 About the units and options 1312.1 About the outdoor unit ................................................................ 1312.2 System layout............................................................................. 1313 Unit installation 1313.1 Opening the unit ......................................................................... 1313.1.1 To open the outdoor unit.............................................. 1313.1.2 To open the electrical component box of the outdoorunit ............................................................................... 1313.2 Mounting the outdoor unit........................................................... 1413.2.1 To provide the installation structure ............................. 1414 Piping installation 1414.1 Preparing refrigerant piping........................................................ 1414.1.1 Refrigerant piping requirements................................... 1414.1.2 To select the piping size .............................................. 1514.1.3 To select refrigerant branch kits................................... 1614.1.4 Multiple outdoor units: Possible layouts....................... 1614.2 Connecting the refrigerant piping ............................................... 1714.2.1 To route the refrigerant piping...................................... 1714.2.2 To connect the refrigerant piping to the outdoor unit ... 1714.2.3 To connect the multi connection piping kit ................... 1714.2.4 To connect the refrigerant branching kit ...................... 1714.2.5 To protect against contamination................................. 1814.2.6 Using the stop valve and service port .......................... 1814.2.7 To remove the spun pipes ........................................... 1914.3 Checking the refrigerant piping .................................................. 1914.3.1 About checking the refrigerant piping .......................... 1914.3.2 Checking refrigerant piping: General guidelines .......... 2014.3.3 Checking refrigerant piping: Setup............................... 2014.3.4 To perform a leak test .................................................. 2014.3.5 To perform vacuum drying ........................................... 2014.3.6 To insulate the refrigerant piping ................................. 2014.4 Charging refrigerant ................................................................... 2114.4.1 Precautions when charging refrigerant ........................ 2114.4.2 About charging refrigerant ........................................... 2114.4.3 To determine the additional refrigerant amount ........... 2114.4.4 To charge refrigerant: Flow chart................................. 2314.4.5 To charge refrigerant ................................................... 2414.4.6 Step 6: To manually charge refrigerant........................ 2514.4.7 Error codes when charging refrigerant......................... 2514.4.8 Checks after charging refrigerant................................. 2515 Electrical installation 2615.1 Safety device requirements........................................................ 2615.2 Field wiring: Overview ................................................................ 2615.3 To route and fix the transmission wiring..................................... 2615.4 To connect the transmission wiring ............................................ 2715.5 To finish the transmission wiring ................................................ 2715.6 To route and fix the power supply .............................................. 27