Daikin FFA50A2VEB9 Installer And User Reference Manual

14 OperationInstaller and user reference guide24FFA25~60A2VEB(9)Split system air conditioners4P550955-4 – 2018.08Outdoor units Cooling HeatingRXS25~60 –10~46°C DB –15~24°C DB–16~18°C WB18~32°C DB 10~30°C DB2MXS50 10~46°C DB –15~24°C DB–16~18°C WB18~32°C DB 10~30°C DB3MXS40~684MXS68~805MXS90–10~46°C DB –15~24°C DB–16~18°C WB18~32°C DB 10~30°C DBRZQG71~140 –15~50°C DB –19~21°C DB–20~15.5°C WB18~37°C DB12~28°C WB10~27°C DBRZQSG71~140 –15~46°C DB –14~21°C DB–15~15.5°C WB20~37°C DB14~28°C WB10~27°C DBRZQ200~250 –5~46°C DB –14~21°C DB–15~15°C WB20~37°C DB14~28°C WB10~27°C DBFor combination with R32 outdoor unit, refer to the following table:Outdoor units Cooling HeatingRXM25~60 –10~46°C DB –15~24°C DB–16~18°C WB18~32°C DB 10~30°C DB2MXM503MXM40~684MXM68~805MXM90–10~46°C DB –15~24°C DB–16~18°C WB18~32°C DB 10~30°C DBRZAG35~60 –20~52°C DB –20~24°C DB–21~18°C WB18~32°C DB 10~30°C DBRZAG71~140 –20~52°C DB –19.5~21°C DB–20~15.5°C WB18~37°C DB12~28°C WB10~27°C DBRZASG71~140 –15~46°C DB –14~21°C DB–15~15.5°C WB20~37°C DB14~28°C WB10~27°C DBIndoor humidity ≤80%(a)Symbol ExplanationOutdoor temperatureIndoor temperature(a) To avoid condensation and water dripping out of the unit. Ifthe temperature or the humidity is beyond these conditions,safety devices may be put in action and the air conditionermay not operate.14.2 Operating the system14.2.1 About operating the system▪ To protect the unit, turn on the main power switch 6 hours beforeoperation.▪ If the main power supply is turned off during operation, operationwill restart automatically after the power turns back on again.14.2.2 About cooling, heating, fan only, andautomatic operation▪ The air flow rate may adjust itself depending on the roomtemperature or the fan may stop immediately. This is not amalfunction.14.2.3 About the heating operationIt may take longer to reach the set temperature for general heatingoperation than for cooling operation.The following operation is performed in order to prevent the heatingcapacity from dropping or cold air from blowing.Defrost operationIn heating operation, freezing of the outdoor unit's air cooled coilincreases over time, restricting the energy transfer to the outdoorunit's coil. Heating capability decreases and the system needs to gointo defrost operation to be able to remove frost from the outdoorunit’s coil. During defrost operation the heating capacity on theindoor unit side will temporarily drop until defrosting is completed.After defrosting, the unit will regain its full heating capacity.The indoor unit will stop fan operation, the refrigerant cycle willreverse and energy from inside the building will be used to defrostthe outdoor unit coil.The indoor unit will indicate defrost operation on the display .Hot startIn order to prevent cold air from blowing out of an indoor unit at thestart of heating operation, the indoor fan is automatically stopped.The display of the user interface shows . It may take sometime before the fan starts. This is not a malfunction.INFORMATION▪ The heating capacity drops when the outsidetemperature falls. If this happens, use another heatingdevice together with the unit. (When using together withappliances that produce open fire, ventilate the roomconstantly). Do not place appliances that produce openfire in places exposed to the air flow from the unit orunder the unit.▪ It takes some time to heat up the room from the timethe unit is started since the unit uses a hot-aircirculating system to heat the entire room.▪ If the hot air rises to the ceiling, leaving the area abovethe floor cold, we recommend that you use thecirculator (the indoor fan for circulating air). Contactyour dealer for details.14.2.4 To operate the system1 Press the operation mode selector button on the user interfaceseveral times and select the operation mode of your choice.Cooling operation