Daikin FFA25A2VEB Installation And Operation Manual

Contents

Daikin FFA25A2VEB Installation And Operation Manual Manual pdf 16 page image

12 OperationInstallation and operation manual16FFA25~60A2VEBSplit system air conditioners4P456960-1 – 2017.03Outdoor units Cooling Heating2MXM503MXM40~684MXM68~805MXM90Outdoortemperature–10~46°C DB –15~24°C DB–16~18°C WBIndoortemperature18~32°C DB 10~30°C DBRZAG71~140 Outdoortemperature–20~52°C DB –19.5~21°C DB–20~15.5°C WBIndoortemperature18~37°C DB12~28°C WB10~27°C DBRZASG71~140 Outdoortemperature–15~46°C DB –14~21°C DB–15~15.5°C WBIndoortemperature20~37°C DB14~28°C WB10~27°C DBIndoor humidity ≤80%(a)(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.12.2 Operating the system12.2.1 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.12.2.2 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.12.2.3 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 deliver enough heat to the indoorunits.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.12.2.4 To operate the system1 Press the operation mode selector button on the user interfaceseveral times and select the operation mode of your choice.Cooling operationHeating operationFan only operation2 Press the ON/OFF button on the user interface.Result: The operation lamp lights up and the system startsoperating.12.3 Using the dry program12.3.1 About the dry program▪ The function of this program is to decrease the humidity in yourroom with minimal temperature decrease (minimal room cooling).▪ The micro computer automatically determines temperature andfan speed (cannot be set by the user interface).▪ The system does not go into operation if the room temperature islow (<20°C).12.3.2 To use the dry programTo start1 Press the operation mode selector button on the user interfaceseveral times and select (program dry operation).2 Press the ON/OFF button of the user interface.Result: The operation lamp lights up and the system startsoperating.To stop3 Press the ON/OFF button on the user interface once again.Result: The operation lamp goes out and the system stopsoperating.NOTICEDo not turn off power immediately after the unit stops, butwait for at least 5 minutes.12.4 Adjusting the air flow directionRefer to the operation manual of the user interface.12.4.1 About the air flow flapDouble flow+multi-flow unitsFor the following conditions, a micro computer controls the air flowdirection which may be different from the display.Cooling Heating▪ When the room temperature islower than the settemperature.▪ When starting operation.▪ When the room temperature ishigher than the settemperature.▪ At defrost operation.▪ When operating continuously at horizontal air flow direction.▪ When continuous operation with downward air flow is performedat the time of cooling with a ceiling-suspended or a wall-mountedunit, the micro computer may control the flow direction, and thenthe user interface indication will also change.The air flow direction can be adjusted in one of the following ways:▪ The air flow flap itself adjusts its position.▪ The air flow direction can be fixed by the user.▪ Automatic and desired position .