Daikin VRV IV+ RXYTQ8U5/U7YF Installation And Operation Manual

17 CommissioningInstallation and operation manual31RXYTQVRV IV+ heat pump for high ambient temperatures4P546223-1C – 2021.11(a) It is necessary to use the optional external control adaptor foroutdoor unit (DTA104A61/62). See the instruction delivered withthe adaptor for further details.[2‑8]Te target temperature during cooling operation.[2‑8] Te target (°C)0 (default) Auto2 63 74 85 96 107 11[2‑9]Tc target temperature during heating operation.[2‑9] Tc target (°C)0 (default) Auto1 413 436 46[2‑20]Manual additional refrigerant charge.[2‑20] Description0 (default) Deactivated.1 Activated.To stop the manual additional refrigerantcharge operation (when the required additionalrefrigerant amount is charged), push BS3. Ifthis function was not aborted by pushing BS3,the unit will stop its operation after 30 minutes.If 30 minutes was not sufficient to add theneeded refrigerant amount, the function can bereactivated by changing the field setting again.16.1.9 To connect the PC configurator to theoutdoor unitX27Aa bc2 3 4 5H J S TX27AA1Pa PCb Cable (EKPCCAB*)c Outdoor unit main PCB17 CommissioningNOTICEGeneral commissioning checklist. Next to thecommissioning instructions in this chapter, a generalcommissioning checklist is also available on the DaikinBusiness Portal (authentication required).The general commissioning checklist is complementary tothe instructions in this chapter and can be used as aguideline and reporting template during the commissioningand hand-over to the user.After installation and once the field settings are defined, the installeris obliged to verify correct operation. Therefore a test run MUST beperformed according to the procedures described below.17.1 Precautions when commissioningCAUTIONDo NOT perform the test operation while working onthe indoor units.When performing the test operation, NOT ONLY theoutdoor unit, but the connected indoor unit will operate aswell. Working on an indoor unit while performing a testoperation is dangerous.NOTICEBe sure to turn ON the power 6 hours before operation inorder to have power running to the crankcase heater andto protect the compressor.During test operation, the outdoor unit and the indoor units will startup. Make sure that the preparations of all indoor units are finished(field piping, electrical wiring, air purge, ...). See installation manualof the indoor units for details.17.2 Checklist before commissioningAfter the installation of the unit, first check the items listed below.Once all checks are fulfilled, the unit MUST be closed. Power-up theunit after it is closed.You read the complete installation and operationinstructions, as described in the installer and userreference guide.InstallationCheck that the unit is properly installed, to avoid abnormalnoises and vibrations when starting up the unit.Field wiringBe sure that the field wiring has been carried outaccording to the instructions described in the chapterConnecting the electrical wiring, according to the wiringdiagrams and according to the applicable legislation.Power supply voltageCheck the power supply voltage on the local supply panel.The voltage MUST correspond to the voltage on thenameplate of the unit.Earth wiringBe sure that the earth wires have been connectedproperly and that the earth terminals are tightened.Insulation test of the main power circuitUsing a megatester for 500 V, check that the insulationresistance of 2 MΩ or more is attained by applying avoltage of 500 V DC between power terminals and earth.NEVER use the megatester for the transmission wiring.